I notice that two lines of a recent changelog entry are not prefixed
with tab. They are prefixed with a space and a tab. This patch
is to remove the space.
gdb:
2013-12-18 Yao Qi <yao@codesourcery.com>
* ChangeLog: Fix the format of one entry.
Like when stepping, the current stack frame location is expected to be
printed as result of tfind command, if that results in moving to a
different function. In tfind_1 we see:
if (from_tty
&& (has_stack_frames () || traceframe_number >= 0))
{
enum print_what print_what;
/* NOTE: in imitation of the step command, try to determine
whether we have made a transition from one function to
another. If so, we'll print the "stack frame" (ie. the new
function and it's arguments) -- otherwise we'll just show the
new source line. */
if (frame_id_eq (old_frame_id,
get_frame_id (get_current_frame ())))
print_what = SRC_LINE;
else
print_what = SRC_AND_LOC;
print_stack_frame (get_selected_frame (NULL), 1, print_what, 1);
do_displays ();
}
However, when we haven't collected any registers in the tracepoint
(collect $regs), that doesn't actually work:
(gdb) tstart
(gdb) info tracepoints
Num Type Disp Enb Address What
1 tracepoint keep y 0x080483b7 in func0
at ../.././../git/gdb/testsuite/gdb.trace/circ.c:28
collect testload
installed on target
2 tracepoint keep y 0x080483bc in func1
at ../.././../git/gdb/testsuite/gdb.trace/circ.c:32
collect testload
installed on target
(gdb) c
Continuing.
Breakpoint 3, end () at ../.././../git/gdb/testsuite/gdb.trace/circ.c:72
72 }
(gdb) tstop
(gdb) tfind start
Found trace frame 0, tracepoint 1
#0 func0 () at ../.././../git/gdb/testsuite/gdb.trace/circ.c:28
28 }
(gdb) tfind
Found trace frame 1, tracepoint 2
32 }
(gdb)
When we don't have info about the stack available
(UNWIND_UNAVAILABLE), frames end up with outer_frame_id as frame ID.
And in the scenario above, the issue is that both frames before and
after the second tfind (the frames for func0 an func1) have the same
id (outer_frame_id), so the frame_id_eq check returns false, even
though the frames were of different functions. GDB knows that,
because the PC is inferred from the tracepoint's address, even if no
registers were collected.
To fix this, this patch adds support for frame ids with a valid code
address, but <unavailable> stack address, and then makes the unwinders
use that instead of the catch-all outer_frame_id for such frames. The
frame_id_eq check in tfind_1 then automatically does the right thing
as expected.
I tested with --directory=gdb.trace/ , before/after the patch, and
compared the resulting gdb.logs, then adjusted the tests to expect the
extra output that came out. Turns out that was only circ.exp, the
original test that actually brought this issue to light.
Tested on x86_64 Fedora 17, native and gdbserver.
gdb/
2013-12-17 Pedro Alves <palves@redhat.com>
* frame.h (enum frame_id_stack_status): New enum.
(struct frame_id) <stack_addr>: Adjust comment.
<stack_addr_p>: Delete field, replaced with ...
<stack_status>: ... this new field.
(frame_id_build_unavailable_stack): Declare.
* frame.c (frame_addr_hash, fprint_field, outer_frame_id)
(frame_id_build_special): Adjust.
(frame_id_build_unavailable_stack): New function.
(frame_id_build, frame_id_build_wild): Adjust.
(frame_id_p, frame_id_eq, frame_id_inner): Adjust to take into
account frames with unavailable stack.
* amd64-tdep.c (amd64_frame_this_id)
(amd64_sigtramp_frame_this_id, amd64_epilogue_frame_this_id): Use
frame_id_build_unavailable_stack.
* dwarf2-frame.c (dwarf2_frame_this_id): Likewise.
* i386-tdep.c (i386_frame_this_id, i386_epilogue_frame_this_id)
(i386_sigtramp_frame_this_id): Likewise.
gdb/testsuite/
2013-12-17 Pedro Alves <palves@redhat.com>
* gdb.trace/circ.exp: Expect frame info to be printed when
switching between frames with unavailable stack, but different
functions.
https://sourceware.org/ml/gdb-patches/2013-12/msg00144.html
The vector of unavailable parts of a value is currently byte based. Given
that we can model a value down to the bit level, we can potentially loose
information with the current implementation. After this patch we model the
unavailable information in bits.
gdb/ChangeLog
* dwarf2loc.c (read_pieced_value): Mark bits, not bytes
unavailable, use correct bit length.
* value.c (struct value): Extend comment on unavailable to
indicate that it is bit based.
(value_bits_available): New function.
(value_bytes_available): Call value_bits_available.
(value_entirely_available): Check against the bit length, not byte
length.
(mark_value_bits_unavailable): New function.
(mark_value_bytes_unavailable): Move contents to
mark_value_bits_unavailable, call to same.
(memcmp_with_bit_offsets): New function.
(value_available_contents_bits_eq): New function, takes the
functionality from value_available_contents_eq but uses
memcmp_with_bit_offsets now, and is bit not byte based.
(value_available_contents_eq): Move implementation into
value_available_contents_bits_eq, call to same.
(value_contents_copy_raw): Work on bits, not bytes.
(unpack_value_bits_as_long_1): Check availability in bits, not
bytes.
* value.h (value_bits_available): Declare new function.
(mark_value_bits_unavailable): Declare new function.
gdb/testsuite/ChangeLog
* gdb.trace/unavailable-dwarf-piece.c: New file.
* gdb.trace/unavailable-dwarf-piece.exp: New file.
Like on GNU/Linux (linux-thread-db.c), the Solaris solaris-threads
target (handles libthread_db.so) shouldn't be pushed when remote
debugging.
This uses the same predicate used by linux-thread-db.c.
gdb/
2013-12-16 Pedro Alves <palves@redhat.com>
PR 16329
* sol-thread.c (check_for_thread_db): If the target can't run or
isn't a core, return without pushing.
This reverts commit 07293be448, as it
causes an unintended change of behavior with GDB/MI's =library-loaded
events: The host-name="<path>" part of the event is now showing the
target-side path instead of the host-side path.
This revert affects Darwin and AIX systems, however, where the BFD
is either artificial or icomplete, leading to the outputt of
"info shared" not containing the information we'd like. For instance,
on Darwin, we would see:
(top-gdb) info shared
From To Syms Read Shared Object Library
0x00007fff8d060de4 0x00007fff8d09ce1f Yes (*) i386:x86-64
0x00007fff8af08b10 0x00007fff8b1c6f73 Yes (*) i386:x86-64
To compensate for that, we overwrite the filename of the associated bfd.
gdb/ChangeLog:
Revert the following commit:
* solib.c (solib_map_sections): Remove code overwriting
SO->SO_NAME with the bfd's filename.
Make the following changes required after the revert above:
* solib-aix.c (solib_aix_bfd_open): Set the filename of the
returned bfd to a copy of the synthetic pathname.
* solib-darwin.c (darwin_bfd_open): Set the filename of the
returned bfd to a copy of PATHNAME.
This function has the following code:
elt_type = type;
for (i = n; i > 1; i--)
elt_type = TYPE_TARGET_TYPE (type);
For multi-dimension arrays, the code above tries to find the array
type corresponding to the dimension we're trying to inspect.
The problem is that, past the second dimension, the loop does
nothing other than repeat the first iteration. There is a little
thinko where it got the TYPE_TARGET_TYPE of TYPE instead of ELT_TYPE!
To my surprise, I was unable to produce an Ada exemple that demonstrated
the problem. That's because the examples I created all trigger a parallel
___XA type which we then use in place of the ELT_TYPE in order to
determine the bounds - see the code that immediately follows our
loop above:
index_type_desc = ada_find_parallel_type (type, "___XA");
ada_fixup_array_indexes_type (index_type_desc);
if (index_type_desc != NULL)
[...]
So, in order to avoid depending on an Ada example where the compiler
can potentially decide one way or the other, I decided to use an
artificial example, written in C. With ...
int multi[1][2][3];
... forcing the language to Ada, and trying to print the 'last,
we get:
(gdb) p multi'last(1)
$1 = 0
(gdb) p multi'last(2)
$2 = 1
(gdb) p multi'last(3)
$3 = 1 <<<--- This should be 2!
Additionally, I noticed that a couple of check_typedef's were missing.
This patch adds them. And since the variable in question only gets
used within an "else" block, I moved the variable declaration and
use inside that block - making it clear what the scope of the variable
is.
gdb/ChangeLog:
* ada-lang.c (ada_array_bound_from_type): Move the declaration
and assignment of variable "elt_type" inside the else block
where it is used. Add two missing check_typedef calls.
Fix bug where we got TYPE's TYPE_TARGET_TYPE, where in fact
we really wanted to get ELT_TYPE's TYPE_TARGET_TYPE.
gdb/testsuite/ChangeLog:
* gdb.ada/arraydim: New testcase.
PR python/16113
* NEWS (Python Scripting): Add entry for the new feature and the
new attribute of gdb.Field objects.
* python/py-type.c (gdbpy_is_field): New function
(convert_field): Add 'parent_type' attribute to gdb.Field
objects.
* python/py-value.c (valpy_getitem): Allow subscript value to be
a gdb.Field object.
(value_has_field): New function
(get_field_flag): New function
* python/python-internal.h (gdbpy_is_field): Add declaration.
testsuite/
* gdb.python/py-value-cc.cc: Improve test case.
* gdb.python/py-value-cc.exp: Add new tests to test usage of
gdb.Field objects as subscripts on gdb.Value objects.
doc/
* gdb.texinfo (Values From Inferior): Add a note about using
gdb.Field objects as subscripts on gdb.Value objects.
(Types In Python): Add description about the new attribute
"parent_type" of gdb.Field objects.
I have a case that could use an exception for "unsupported feature".
I found UNSUPPORTED_ERROR, but looking deeper, I think as is, reusing
it for other things would be fragile. E.g., if the Python script
sourced by source_script_from_stream triggers any other missing
functionality that would result in UNSUPPORTED_ERROR being propagated
out to source_script_from_stream, that would confuse the error for
Python not being built into GDB.
This patch thus redoes things a little. Instead of using an exception
for the "No Python" scenario, check whether Python is configured in
before actually trying to source the file. It adds a new function
instead of using #ifdef HAVE_PYTHON directly, as that is better at
avoiding bitrot, as both Python and !Python paths are visible to the
compiler this way.
Tested on Fedora 17, with and without Python.
gdb/
2013-12-12 Pedro Alves <palves@redhat.com>
* cli/cli-cmds.c (source_script_from_stream) Use have_python
instead of catching UNSUPPORTED_ERROR.
* exceptions.h (UNSUPPORTED_ERROR): Delete.
* python/python.c (source_python_script) [!HAVE_PYTHON]: Internal
error if called.
* python/python.h (have_python): New static inline function.
This patch sanitizes the access to gdbarch made by various functions of
the SDT probe API. Before this patch, gdbarch was being accessed via
the probe's objfile; however, this proved to cause a bug on 32-bit ARM
targets because during the parsing of the probe's arguments the code
needed to access some pseudo-registers of the architecture, and this
information is not fully correct on the objfile's gdbarch.
Basically, the approach taken was to instead pass the current/selected
frame to the parsing and evaluation functions, so that they can extract
the gdbarch directly from the frame. It solved the ARM bug reported
above, and also contributed to make the API cleaner.
Tested on x86_64 and 32-bit ARM.
2013-12-11 Sergio Durigan Junior <sergiodj@redhat.com>
* break-catch-throw.c (fetch_probe_arguments): Pass selected frame
to get_probe_argument_count and evaluate_probe_argument.
* probe.c (get_probe_argument_count): Adjust declaration to accept
frame. Pass frame to probe_ops's get_probe_argument_count.
(evaluate_probe_argument): Likewise, for evaluate_probe_argument.
(probe_safe_evaluate_at_pc): Pass frame to
get_probe_argument_count and evaluate_probe_argument.
* probe.h (struct probe_ops) <get_probe_argument_count,
evaluate_probe_argument>: Adjust declarations to accept frame.
(get_probe_argument_count, evaluate_probe_argument): Likewise.
* solib-svr4.c (solib_event_probe_action): Get current frame.
Pass it to get_probe_argument_count.
(svr4_handle_solib_event): Get current frame. Pass it to
get_probe_argument_count and evaluate_probe_argument.
* stap-probe.c (stap_parse_probe_arguments): Adjust declaration to
accept gdbarch. Do not obtain it from the probe's objfile.
(stap_get_probe_argument_count): Adjust declaration to accept
frame. Obtain gdbarch from the frame. Call generic
can_evaluate_probe_arguments. Pass gdbarch to
stap_parse_probe_arguments.
(stap_get_arg): Adjust declaration to accept gdbarch. Pass it to
stap_parse_probe_arguments.
(stap_evaluate_probe_argument): Adjust declaration to accept
frame. Obtain gdbarch from the frame. Pass gdbarch to
stap_get_arg.
(stap_compile_to_ax): Pass agent_expr's gdbarch to stap_get_arg.
(compute_probe_arg): Obtain gdbarch from frame. Pass frame to
get_probe_argument_count and evaluate_probe_argument.
* c-lang.c (c_get_string): Ignore the declared size of the object
if a specific length is requested.
testsuite/
* gdb.python/py-value.c: #include stdlib.h, string.h.
(str): New struct.
(main): New local xstr.
* gdb.python/py-value.exp (test_value_in_inferior): Add test to
fetch a value as a string with a length beyond the declared length
of the array.
GDB is able to cache memory accesses requested in target_read_code,
so target_read_code is more efficient than general target_read_memory.
This patch uses target_read_code and its variants to read target
memory in the functions related to i386_skip_prologue. It improves
the performance when doing 'b foo' (foo is a function) in remote
debugging.
Nowadays, when we set a breakpoint on function f1, GDB will fetch the
code in f1 to determine the start of the function body (say skip the
prologue), it requests read from target many times. With this patch
applied, the number of RSP 'm' packets are reduced.
gdb:
2013-12-10 Yao Qi <yao@codesourcery.com>
* corefile.c (read_code): New function.
(read_code_integer): New function.
(read_code_unsigned_integer): New function.
* gdbcore.h (read_code): Declare.
(read_code_integer): Declare.
(read_code_unsigned_integer): Declare.
* i386-tdep.c (i386_follow_jump): Call target_read_code instead
of target_read_memory. Call read_code_unsigned_integer instead
of read_memory_unsigned_integer.
(i386_analyze_struct_return): Likewise.
(i386_skip_probe): Likewise.
(i386_analyze_stack_align): Likewise.
(i386_match_pattern): Likewise.
(i386_skip_noop): Likewise.
(i386_analyze_frame_setup): Likewise.
(i386_analyze_register_saves): Likewise.
(i386_skip_prologue): Likewise.
(i386_skip_main_prologue): Likewise.
(i386_frame_cache_1): Likewise.
This helps with the following issue: Given an Ada program defining
a global variable:
package Pck is
Watch : Integer := 1974;
end Pck;
When printing the address of this variable, GDB also tries to print
the associated symbol name:
(gdb) p watch'address
$1 = (access integer) 0x6139d8 <pck__watch>
^^
||
The problem is that GDB prints the variable's linkage name, instead
of its natural name. This is because the language of the associated
minimal symbol never really gets set.
This patch adds handling for Ada symbols in symbol_find_demangled_name.
After this patch, we now get:
(gdb) p watch'address
$1 = (access integer) 0x6139d8 <pck.watch>
^
|
gdb/ChangeLog:
* symtab.c (symbol_find_demangled_name): Add handling of
Ada symbols.
gdb/testsuite/ChangeLog:
* gdb.ada/int_deref.exp: Add test verifying that we print
the decoded symbol name when printing the address of Ada
symbols.
This adds "exec-run-start-option" in the output of the -list-features
commands, allowing front-ends to easily determine whether -exec-run
supports the --start option.
gdb/ChangeLog:
* mi/mi-main.c (mi_cmd_list_features): add "exec-run-start-option".
* NEWS: Expand the entry documenting the new -exec-run --start
option to mention the corresponding new entry in the output of
"-list-features".
gdb/doc/ChangeLog:
* gdb.texinfo (GDB/MI Miscellaneous Commands): Document the new
"exec-run-start-option" entry in the output of the "-list-features"
command.
gdb/testsuite/ChangeLog:
* gdb.mi/mi-start.exp: Add test verifying that -list-features
contains "exec-run-start-option".
We observed on Windows 2012 that we were unable to unwind past
exception handlers. For instance, with any Ada program raising
an exception that does not get handled:
% gnatmake -g a -bargs -shared
% gdb a
(gdb) start
(gdb) catch exception unhandled
Catchpoint 2: unhandled Ada exceptions
(gdb) c
Catchpoint 2, unhandled CONSTRAINT_ERROR at <__gnat_unhandled_exception> (
e=0x645ff820 <constraint_error>) at s-excdeb.adb:53
53 s-excdeb.adb: No such file or directory.
At this point, we can already see that something went wrong, since
the frame selected by the debugger corresponds to a runtime function
rather than the function in the user code that caused the exception
to be raised (in our case procedure A).
This is further confirmed by the fact that we are unable to unwind
all the way to procedure A:
(gdb) bt
#0 <__gnat_unhandled_exception> (e=0x645ff820 <constraint_error>)
at s-excdeb.adb:53
#1 0x000000006444e9a3 in <__gnat_notify_unhandled_exception> (excep=0x284d2
+0)
at a-exextr.adb:144
#2 0x00000000645f106a in __gnat_personality_imp ()
from C:\[...]\libgnat-7.3.dll
#3 0x000000006144d1b7 in _GCC_specific_handler (ms_exc=0x242fab0,
this_frame=0x242fe60, ms_orig_context=0x242f5c0, ms_disp=0x242ef70,
gcc_per=0x645f0960 <__gnat_personality_imp>)
at ../../../src/libgcc/unwind-seh.c:289
#4 0x00000000645f1211 in __gnat_personality_seh0 ()
from C:\[...]\libgnat-7.3.dll
#5 0x000007fad3879f4d in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
It turns out that the unwinder has been doing its job flawlessly
up until frame #5. The address in frame #5 is correct, but GDB
is not able to associate it with any symbol or unwind record.
And this is because this address is inside ntdll.dll, and when
we received the LOAD_DLL_DEBUG_EVENT for that DLL, the system
was not able to tell us the name of the library, thus causing us
to silently ignoring the event. Because GDB does not know about
ntdll.dll, it is unable to access the unwind information from it.
And because the function at that address does not use a frame
pointer, the unwinding becomes impossible.
This patch helps recovering ntdll.dll at the end of the "run/attach"
phase, simply by trying to locate that specific DLL again.
In terms of our medium to long term planning, it seems to me that
we should be able to simplify the code by ignoring LOAD_DLL_DEBUG_EVENT
during the startup phase, and modify windows_ensure_ntdll_loaded
to then detect and report all shared libraries after we've finished
inferior creation. But for a change just before 7.7 branch creation,
I thought it was safest to just handle ntdll.dll specifically. This
is less intrusive, and ntdll is the only DLL affected by the problem
I know so far.
gdb/ChangeLog:
* windows-nat.c (handle_load_dll): Add comments.
(windows_ensure_ntdll_loaded): New function.
(do_initial_windows_stuff): Use windows_ensure_ntdll_loaded.
Add FIXME comment.
Hi,
I see such warning below on one compiler I am using.
cc1: warnings being treated as errors
../../workspace/gdb/stack.c: In function 'frame_info':
../../workspace/gdb/stack.c:1519:20: error: 'caller_pc' may be used uninitialized in this function
Go through the gdb-patches archives and find the "canonical" way to
fix this warning is to initialize the variable.
gdb:
2013-12-08 Yao Qi <yao@codesourcery.com>
* stack.c (frame_info): Initialize variable caller_pc.
Doing "info frame" in the outermost frame, when that was indicated by
the next frame saying the unwound PC is undefined/not saved, results
in error and incomplete output:
(gdb) bt
#0 thread_function0 (arg=0x0) at threads.c:63
#1 0x00000034cf407d14 in start_thread (arg=0x7ffff7fcb700) at pthread_create.c:309
#2 0x000000323d4f168d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115
(gdb) frame 2
#2 0x000000323d4f168d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115
115 call *%rax
(gdb) info frame
Stack level 2, frame at 0x0:
rip = 0x323d4f168d in clone (../sysdeps/unix/sysv/linux/x86_64/clone.S:115); saved rip Register 16 was not saved
(gdb)
Not saved register values are treated as optimized out values
internally throughout. stack.c:frame_info is handing unvailable
values, but not optimized out ones. The patch deletes the
frame_unwind_caller_pc_if_available wrapper function and instead lets
errors propagate to frame_info (it's only user).
As frame_unwind_pc now needs to be able to handle and cache two
different error scenarios, the prev_pc.p variable is replaced with an
enumeration.
(FWIW, I looked into making gdbarch_unwind_pc or a variant return
struct value's instead, but it results in lots of boxing and unboxing
for no real gain -- e.g., the mips and arm implementations need to do
computation on the unboxed PC value. Might as well throw an error on
first attempt to get at invalid contents.)
After the patch, we get:
(gdb) info frame
Stack level 2, frame at 0x0:
rip = 0x323d4f168d in clone (../sysdeps/unix/sysv/linux/x86_64/clone.S:115); saved rip = <not saved>
Outermost frame: outermost
caller of frame at 0x7ffff7fcafc0
source language asm.
Arglist at 0x7ffff7fcafb8, args:
Locals at 0x7ffff7fcafb8, Previous frame's sp is 0x7ffff7fcafc8
(gdb)
A new test is added. It's based off dw2-reg-undefined.exp, and tweaked to
mark the return address (rip) of "stop_frame" as undefined.
Tested on x86_64 Fedora 17.
gdb/
2013-12-06 Pedro Alves <palves@redhat.com>
* frame.c (enum cached_copy_status): New enum.
(struct frame_info) <prev_pc.p>: Change type to enum
cached_copy_status.
(fprint_frame): Handle not saved and unavailable prev_pc values.
(frame_unwind_pc_if_available): Delete and merge contents into ...
(frame_unwind_pc): ... here. Handle OPTIMIZED_OUT_ERROR. Adjust
to use enum cached_copy_status.
(frame_unwind_caller_pc_if_available): Delete.
(create_new_frame): Adjust.
* frame.h (frame_unwind_caller_pc_if_available): Delete
declaration.
* stack.c (frame_info): Use frame_unwind_caller_pc instead of
frame_unwind_caller_pc_if_available, and handle
NOT_AVAILABLE_ERROR and OPTIMIZED_OUT_ERROR errors.
* valprint.c (val_print_optimized_out): Use val_print_not_saved.
(val_print_not_saved): New function.
* valprint.h (val_print_not_saved): Declare.
gdb/testsuite/
2013-12-06 Pedro Alves <palves@redhat.com>
* gdb.dwarf2/dw2-undefined-ret-addr.S: New file.
* gdb.dwarf2/dw2-undefined-ret-addr.c: New file.
* gdb.dwarf2/dw2-undefined-ret-addr.exp: New file.
In order to catch <optimized out> errors like we catch <unavailable>
errors, this adds a new OPTIMIZED_OUT_ERROR error code, and throws it
in various places.
gdb/ChangeLog
2013-12-06 Andrew Burgess <aburgess@broadcom.com>
Pedro Alves <palves@redhat.com>
* exceptions.h (errors): Add OPTIMIZED_OUT_ERROR.
* dwarf2loc.c (write_pieced_value): Throw OPTIMIZED_OUT_ERROR.
* frame.c (frame_unwind_register): Throw OPTIMIZED_OUT_ERROR.
* spu-tdep.c (spu_software_single_step): Throw
OPTIMIZED_OUT_ERROR.
* valops.c (value_assign): Throw OPTIMIZED_OUT_ERROR.
The introductory comment to free_objfile is obsolete.
This patch fixes it by removing all the obsolete bits.
2013-12-06 Tom Tromey <tromey@redhat.com>
* objfiles.c (free_objfile): Update comment.
I happened to notice that nothing uses objfile_to_front.
This patch removes it.
2013-12-06 Tom Tromey <tromey@redhat.com>
* objfiles.h (objfile_to_front): Remove.
* objfiles.c (objfile_to_front): Remove.
This removes an unnecessary declaration from minsyms.c.
2013-12-06 Tom Tromey <tromey@redhat.com>
* minsyms.c (get_symbol_leading_char): Remove unnecessary
declaration.
This improves the packing of struct partial_symtab. I noticed with
pahole that were were a couple of holes. This consolidates the holes
without, I think, affecting readability -- it just moves the "user"
field a bit earlier in the struct. This change saves a small amount
of memory.
2013-12-06 Tom Tromey <tromey@redhat.com>
* psympriv.h (struct partial_symtab) <user>: Move earlier.
This fixes a couple of old "32x64" FIXME comments by using paddress
with current_gdbarch rather than hex_string and a cast to long.
2013-12-06 Tom Tromey <tromey@redhat.com>
* cli/cli-cmds.c (edit_command): Use paddress, not hex_string.
(list_command): Likewise.
This puts the psymtab filename in the filename bcache.
This saves a small amount of memory.
2013-12-06 Tom Tromey <tromey@redhat.com>
* psymtab.c (allocate_psymtab): Put the filename in the filename
bcache.
This makes symtab::dirname const and updates one spot to avoid an
intermediate constless result.
2013-12-06 Tom Tromey <tromey@redhat.com>
* buildsym.c (end_symtab_from_static_block): Use obstack_copy0.
* symtab.h (struct symtab) <dirname>: Now const.
This makes symtab::filename const and removes a newly unnecessary
cast.
2013-12-06 Tom Tromey <tromey@redhat.com>
* symfile.c (allocate_symtab): Remove cast.
* symtab.h (struct symtab) <filename>: Now const.
While looking into the probe API, it seemed to me that there were a
number of methods in sym_probe_fns that were not needed. This patch
removes them.
Specifically, it seems to me that sym_probe_fns ought to be concerned
with the API for constructing the probes. Any method relating to some
aspect of an individual probe can be handled via the probe's own
vtable. That is, the double indirection here doesn't seem useful --
it certainly isn't in fact used, but also I couldn't think of a
potential use.
2013-12-06 Tom Tromey <tromey@redhat.com>
* break-catch-throw.c (fetch_probe_arguments): Use
get_probe_argument_count and evaluate_probe_argument.
* elfread.c (elf_get_probe_argument_count)
(elf_can_evaluate_probe_arguments, elf_evaluate_probe_argument)
(elf_compile_to_ax): Remove.
(elf_probe_fns): Update.
* probe.c (get_probe_argument_count, can_evaluate_probe_arguments)
(evaluate_probe_argument): Call method on probe, not via sym
functions.
* stap-probe.c (compute_probe_arg): Use get_probe_argument_count,
evaluate_probe_argument.
(compile_probe_arg): Use get_probe_argument_count. Call method on
probe, not via sym functions.
* symfile-debug.c (debug_sym_get_probe_argument_count)
(debug_can_evaluate_probe_arguments)
(debug_sym_evaluate_probe_argument, debug_sym_compile_to_ax):
Remove.
(debug_sym_probe_fns): Remove.
* symfile.h (struct sym_probe_fns) <sym_get_probe_argument_count,
can_evaluate_probe_arguments, sym_evaluate_probe_argument,
sym_compile_to_ax>: Remove fields.
* p-exp.y (exp : field_exp name): Do not call mark_struct_expression.
(exp : field_exp name COMPLETE): New rule.
(exp : SIZEOF): Set correct current_type.
(last_was_structop): Remove static variable.
(yylex): Remove saw_structop local variable.
Adapt code to removal of variables above.
With a simple Ada program where I have 3 functions, one just calling
the next, the backtrace is currently broken when GDB is compiled
at -O2:
#0 hello.first () at hello.adb:5
#1 0x0000000100001475 in hello.second () at hello.adb:10
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
It turns out that a recent patch deleted the assignment of variable
this_id, making it an unitialized variable:
* frame-unwind.c (default_frame_unwind_stop_reason): Return
UNWIND_OUTERMOST if the frame's ID is outer_frame_id.
* frame.c (get_prev_frame_1): Remove outer_frame_id check.
The hunk in question starts with:
- /* Check that this frame is not the outermost. If it is, don't try
- to unwind to the prev frame. */
- this_id = get_frame_id (this_frame);
- if (frame_id_eq (this_id, outer_frame_id))
(the code was removed as redundant - but removing the assignment
was in fact not intentional).
There is no other code in this function that sets the variable.
Instead of re-adding the statement in the lone section where it is
actually used, I inlined it, and then got rid of the variable
altogether. This way, and until we start needing this frame ID
in another location within that function, we dont' have to worry
about the variable's validity/lifetime.
gdb/ChangeLog:
* frame.c (get_prev_frame_1): Delete variable "this_id".
Replace its use by a call to get_frame_id.
We've observed in Windows 2012 that ntdll.dll contains some unwind
records with the version field set to 2. This patch adjusts the
decoder to accept records flagged with this version as well.
Version 2 appears to still be largely undocumented at this stage.
However, apart from a mysterious opcode 6, everything else still
seems to remain the same. So this patch also changes the decoder
to ignore those opcodes; before this change, the debugger would
silently stop the decoding, and let the frame unwinder make do
with what it the decoder managed to decode up to that point.
It's unclear at this point what we're losing by not being able to
decode that opcode. But the information does not appear to be critical,
at least as far as call unwinding is concerned.
gdb/ChangeLog:
(from Tristan Gingold <gingold@adacore.com>)
(from Joel Brobecker <brobecker@adacore.com>)
* amd64-windows-tdep.c (amd64_windows_frame_decode_insns):
Accept version 2. Ignore operations using opcode 6.
Consider the following code:
type Ptr is access all Integer;
IP : Ptr := new Integer'(123);
IP is the Ada exception of a pointer to an integer. To dereference
the pointer and get its value, the user uses the reserved word "all"
as follow:
(gdb) p ip.all
$1 = 123
Ada being a case-insensitive language, the casing should not matter.
Unfortunately, for the reserved word "all", things don't work. For
instance:
(gdb) p ip.ALL
Type integer is not a structure or union type
This patch fixes the problem.
gdb/ChangeLog:
* ada-lex.l (find_dot_all): Use strncasecmp instead of strncmp.
gdb/testsuite/ChangeLog:
* gdb.ada/dot_all: New testcase.
With a program raising an exception, trying to debug that program
in GDB/MI mode can yield a crash:
% gdb -i=mi foo
(gdb)
-catch-exception -e "Program_Error"
^done,bkptno="2",bkpt={number="2",type="breakpoint",[...]
(gdb)
-exec-continue
^running
*running,thread-id="all"
(gdb)
=library-loaded,id=[...]
&"warning: failed to reevaluate internal exception condition for catchpoint 2: Error in expression, near `'.\n"
zsh: 22956 bus error (core dumped) gdb -q -i=mi foo
The problem is triggered by a problem in the compiler which causes
EXP in the following TRY_CATCH block to change unexpectedly when
parse_exp_1 throws an error :
| TRY_CATCH (e, RETURN_MASK_ERROR)
| {
| exp = parse_exp_1 (&s, bl->address,
| block_for_pc (bl->address), 0);
| }
In ada-lang.c:create_excep_cond_exprs, EXP is initialized to NULL,
and is expected to remain NULL if parse_exp_1 throws. Instead,
its value gets changed to something invalid. This later crashes
the debugger, when trying to evaluate the bogus expression.
This patch works around the issue by simply forcing EXP back to NULL
when an exception was thrown. A comment explaining why, and the sort
of timeline we're looking at for a fix, is also added.
gdb/ChangeLog:
* ada-lang.c (create_excep_cond_exprs): Force EXP to NULL
when parse_exp_1 threw an error. Add comment.
This patch extends a bit the news entry we added which documents
general support of the --language option, to add a small reference
to the associated entry which was also added to the "-list-features"
command output.
gdb/ChangeLog:
* NEWS: Mention "-list-features" in the entry documenting
the support for the "--language" option.
Now that the -info-gdb-mi-command is available, there is no need for
this entry. The entry and associated new commands were added recently
enough that no front-end out there should be depending on it yet.
gdb/ChangeLog:
* mi/mi-main.c (mi_cmd_list_features): Remove "ada-exceptions".
gdb/doc/ChangeLog:
* gdb.texinfo (GDB/MI Miscellaneous Commands): Remove the
documentation of the "ada-exceptions" entry.
... when trying to execute an undefined GDB/MI command. When trying
to execute a GDB/MI command which does not exist, the current error
result record looks like this:
-unsupported
^error,msg="Undefined MI command: unsupported"
The only indication that the command does not exist is the error
message. It would be a little fragile for a consumer to rely solely
on the contents of the error message in order to determine whether
a command exists or not.
This patch improves the situation by adding concept of error
code, starting with one well-defined error code ("undefined-command")
identifying errors due to a non-existant command. Here is the new
output:
-unsupported
^error,msg="Undefined MI command: unsupported",code="undefined-command"
This error code is only displayed when the corresponding error
condition is met. Otherwise, the error record remains unchanged.
For instance:
-symbol-list-lines foo.adb
^error,msg="-symbol-list-lines: Unknown source file name."
For frontends to be able to know whether they can rely on this
variable, a new entry "undefined-command-error-code" has been
added to the "-list-features" command. Another option would be
to always generate an error="..." variable (for the default case,
we could decide for instance that the error code is the empty string).
But it seems more efficient to provide that info in "-list-features"
and then only add the error code when meaningful.
gdb/ChangeLog:
(from Pedro Alves <palves@redhat.com>)
(from Joel Brobecker <brobecker@adacore.com>)
* exceptions.h (enum_errors) <UNDEFINED_COMMAND_ERROR>: New enum.
* mi/mi-parse.c (mi_parse): Throw UNDEFINED_COMMAND_ERROR instead
of a regular error when the GDB/MI command does not exist.
* mi/mi-main.c (mi_cmd_list_features): Add
"undefined-command-error-code".
(mi_print_exception): Print an "undefined-command"
error code if EXCEPTION.ERROR is UNDEFINED_COMMAND_ERROR.
* NEWS: Add entry documenting the new "code" variable in
"^error" result records.
gdb/doc/ChangeLog:
* gdb.texinfo (GDB/MI Result Records): Fix the syntax of the
"^error" result record concerning the error message. Document
the error code that may also be part of that result record.
(GDB/MI Miscellaneous Commands): Document the
"undefined-command-error-code" element in the output of
the "-list-features" GDB/MI command.
gdb/testsuite/ChangeLog:
* gdb.mi/mi-undefined-cmd.exp: New testcase.
This patch adds a new GDB/MI command meant for graphical frontends
trying to determine whether a given GDB/MI command exists or not.
Examples:
-info-gdb-mi-command unsupported-command
^done,command={exists="false"}
(gdb)
-info-gdb-mi-command symbol-list-lines
^done,command={exists="true"}
(gdb)
At the moment, this is the only piece of information that this
command returns.
Eventually, and if needed, we can extend it to provide
command-specific pieces of information, such as updates to
the command's syntax since inception. This could become,
for instance:
-info-gdb-mi-command symbol-list-lines
^done,command={exists="true",features=[]}
(gdb)
-info-gdb-mi-command catch-assert
^done,command={exists="true",features=["conditions"]}
In the first case, it would mean that no extra features,
while in the second, it announces that the -catch-assert
command in this version of the debugger supports a feature
called "condition" - exact semantics to be documented with
combined with the rest of the queried command's documentation.
But for now, we start small, and only worry about existance.
And to bootstrap the process, I have added an entry in the
output of the -list-features command as well ("info-gdb-mi-command"),
allowing the graphical frontends to go through the following process:
1. Send -list-features, collect info from there as before;
2. Check if the output contains "info-gdb-mi-command".
If it does, then support for various commands can be
queried though -info-gdb-mi-command. Newer commands
will be expected to always be checked via this new
-info-gdb-mi-command.
gdb/ChangeLog:
* mi/mi-cmds.h (mi_cmd_info_gdb_mi_command): Declare.
* mi/mi-cmd-info.c (mi_cmd_info_gdb_mi_command): New function.
* mi/mi-cmds.c (mi_cmds): Add -info-gdb-mi-command command.
* mi/mi-main.c (mi_cmd_list_features): Add "info-gdb-mi-command"
field to output of "-list-features".
* NEWS: Add entry for new -info-gdb-mi-command.
gdb/doc/ChangeLog:
* gdb.texinfo (GDB/MI Miscellaneous Commands): Document
the new -info-gdb-mi-command GDB/MI command. Document
the meaning of "-info-gdb-mi-command" in the output of
-list-features.
gdb/testsuite/ChangeLog:
* gdb.mi/mi-i-cmd.exp: New file.
gdb/
2013-12-02 Doug Evans <dje@google.com>
Jan Kratochvil <jan.kratochvil@redhat.com>
* objfiles.c (allocate_objfile): Save original_name as an absolute
path.
* objfiles.h (struct objfile): Expand comment on original_name.
* source.c (openp): Call gdb_abspath.
* utils.c (gdb_abspath): New function.
* utils.h (gdb_abspath): Declare.
gdb/testsuite/
2013-12-02 Doug Evans <dje@google.com>
* gdb.dwarf/dwp-symlink.c: Fake out gdb to not load debug info
at start.
* gdb.dwarf/dwp-symlink.exp: Test trying to load dwp when the binary
has been specified with a relative path and we have chdir'd before
accessing the debug info.
Confirmed that cross building a mingw gdb still works, and also made
sure it was gnulib's sys/stat.h that was defining the values, by
hacking the header with #errors where the macros are defined.
gdb/
2013-12-02 Pedro Alves <palves@redhat.com>
* ctf.c (ctf_start): Use S_IRGRP, S_IXGRP, S_IXOTH
unconditionally.
Remote servers may cut the connection abruptly since they are not
required to reply to a 'k' (Kill) packet sent from GDB.
This patch addresses any issues arising from such scenario, which
leads to a GDB internal error due to an attempt to pop the target more
than once. With the patch, this failure is handled gracefully.
Here's the GDB backtrace Maciej got running the testsuite against
QEMU. Full paths edited out for brevity.
#0 0x55573430 in __kernel_vsyscall ()
#1 0x557a2951 in raise () from /lib32/libc.so.6
#2 0x557a5d82 in abort () from /lib32/libc.so.6
#3 0x0826e2e4 in dump_core ()
at .../gdb/utils.c:635
#4 0x0826e5b6 in internal_vproblem (problem=0x85200c0,
file=0x8416be8 ".../gdb/target.c", line=2861,
fmt=0x84174ac "could not find a target to follow mourn inferior",
ap=0xffa4796c "\f")
at .../gdb/utils.c:804
#5 0x0826e5fb in internal_verror (
file=0x8416be8 ".../gdb/target.c", line=2861,
fmt=0x84174ac "could not find a target to follow mourn inferior",
ap=0xffa4796c "\f")
at .../gdb/utils.c:820
#6 0x0826e633 in internal_error (
file=0x8416be8 ".../gdb/target.c", line=2861,
string=0x84174ac "could not find a target to follow mourn inferior")
at .../gdb/utils.c:830
#7 0x081b4ad0 in target_mourn_inferior ()
at .../gdb/target.c:2861
#8 0x08082283 in remote_kill (ops=0x85245e0)
at .../gdb/remote.c:7840
#9 0x081b06d1 in target_kill ()
at .../gdb/target.c:486
#10 0x081b42f6 in dispose_inferior (inf=0xa501c60, args=0x0)
at .../gdb/target.c:2570
#11 0x08290cfc in iterate_over_inferiors (
callback=0x81b42af <dispose_inferior>, data=0x0)
at .../gdb/inferior.c:396
#12 0x081b435a in target_preopen (from_tty=1)
at .../gdb/target.c:2591
#13 0x0807c2c6 in remote_open_1 (name=0xa5538b6 "localhost:1237", from_tty=1,
target=0x85245e0, extended_p=0)
at .../gdb/remote.c:4292
#14 0x0807b7a8 in remote_open (name=0xa5538b6 "localhost:1237", from_tty=1)
at .../gdb/remote.c:3655
#15 0x080a23d4 in do_cfunc (c=0xa464f30, args=0xa5538b6 "localhost:1237",
from_tty=1)
at .../gdb/cli/cli-decode.c:107
#16 0x080a4c3b in cmd_func (cmd=0xa464f30, args=0xa5538b6 "localhost:1237",
from_tty=1)
at .../gdb/cli/cli-decode.c:1882
#17 0x0826bebf in execute_command (p=0xa5538c3 "7", from_tty=1)
at .../gdb/top.c:467
#18 0x08193f2d in command_handler (command=0xa5538a8 "")
at .../gdb/event-top.c:435
#19 0x08194463 in command_line_handler (
rl=0xa778198 "target remote localhost:1237")
at .../gdb/event-top.c:633
#20 0x082ba92b in rl_callback_read_char ()
at .../readline/callback.c:220
#21 0x08193adf in rl_callback_read_char_wrapper (client_data=0x0)
at .../gdb/event-top.c:164
#22 0x08193e57 in stdin_event_handler (error=0, client_data=0x0)
at .../gdb/event-top.c:375
#23 0x08192f29 in handle_file_event (data=...)
at .../gdb/event-loop.c:768
#24 0x0819266a in process_event ()
at .../gdb/event-loop.c:342
#25 0x08192708 in gdb_do_one_event ()
at .../gdb/event-loop.c:394
#26 0x08192781 in start_event_loop ()
at .../gdb/event-loop.c:431
#27 0x08193b08 in cli_command_loop (data=0x0)
at .../gdb/event-top.c:179
#28 0x0818bc26 in current_interp_command_loop ()
at .../gdb/interps.c:327
#29 0x0818c4e5 in captured_command_loop (data=0x0)
at .../gdb/main.c:267
#30 0x0818a37f in catch_errors (func=0x818c4d0 <captured_command_loop>,
func_args=0x0, errstring=0x8402108 "", mask=RETURN_MASK_ALL)
at .../gdb/exceptions.c:524
#31 0x0818d736 in captured_main (data=0xffa47f10)
at .../gdb/main.c:1067
#32 0x0818a37f in catch_errors (func=0x818c723 <captured_main>,
func_args=0xffa47f10, errstring=0x8402108 "", mask=RETURN_MASK_ALL)
at .../gdb/exceptions.c:524
#33 0x0818d76c in gdb_main (args=0xffa47f10)
at .../gdb/main.c:1076
#34 0x0804dd1b in main (argc=5, argv=0xffa47fd4)
at .../gdb/gdb.c:34
The corresponding gdb.log excerpt:
(gdb) PASS: gdb.base/bitfields.exp: bitfield uniqueness (u9)
cont
Continuing.
Breakpoint 1, break1 () at .../gdb/testsuite/gdb.base/bitfields.c:44
44 }
(gdb) PASS: gdb.base/bitfields.exp: continuing to break1 #9
print flags
$10 = {uc = 0 '\000', s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 1 '\001'}
(gdb) PASS: gdb.base/bitfields.exp: bitfield uniqueness (sc)
delete breakpoints
Delete all breakpoints? (y or n) y
(gdb) info breakpoints
No breakpoints or watchpoints.
(gdb) delete breakpoints
(gdb) info breakpoints
No breakpoints or watchpoints.
(gdb) break break2
Breakpoint 2 at 0x85f8: file .../gdb/testsuite/gdb.base/bitfields.c, line 48.
(gdb) entering gdb_reload
target remote localhost:1235
A program is being debugged already. Kill it? (y or n) y
Remote connection closed
.../gdb/target.c:2861: internal-error: could not find a target to follow mourn inferior
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) ^Ccontinue
Please answer y or n.
.../gdb/target.c:2861: internal-error: could not find a target to follow mourn inferior
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) Resyncing due to internal error.
n
.../gdb/target.c:2861: internal-error: could not find a target to follow mourn inferior
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) y
Command aborted.
(gdb) print/x flags
$11 = {uc = 0x0, s1 = 0x0, u1 = 0x0, s2 = 0x0, u2 = 0x0, s3 = 0x0, u3 = 0x0, s9 = 0x0, u9 = 0x0, sc = 0x0}
(gdb) FAIL: gdb.base/bitfields.exp: bitfield containment #1
cont
The program is not being run.
(gdb) FAIL: gdb.base/bitfields.exp: continuing to break2 (the program is no longer running)
print/x flags
$12 = {uc = 0x0, s1 = 0x0, u1 = 0x0, s2 = 0x0, u2 = 0x0, s3 = 0x0, u3 = 0x0, s9 = 0x0, u9 = 0x0, sc = 0x0}
(gdb) FAIL: gdb.base/bitfields.exp: bitfield containment #2
delete breakpoints
Delete all breakpoints? (y or n) y
(gdb) info breakpoints
No breakpoints or watchpoints.
(gdb) delete breakpoints
(gdb) info breakpoints
No breakpoints or watchpoints.
(gdb) break break3
Breakpoint 3 at 0x8604: file .../gdb/testsuite/gdb.base/bitfields.c, line 52.
(gdb) entering gdb_reload
target remote localhost:1236
Remote debugging using localhost:1236
Reading symbols from .../lib/ld-linux.so.3...done.
Loaded symbols for .../lib/ld-linux.so.3
0x41001b80 in _start () from .../lib/ld-linux.so.3
(gdb) continue
Continuing.
Breakpoint 3, break3 () at .../gdb/testsuite/gdb.base/bitfields.c:52
52 }
(gdb) print flags
$13 = {uc = 0 '\000', s1 = 0, u1 = 1, s2 = 0, u2 = 3, s3 = 0, u3 = 7, s9 = 0, u9 = 511, sc = 0 '\000'}
(gdb) PASS: gdb.base/bitfields.exp: unsigned bitfield ranges
gdb/
2013-12-02 Pedro Alves <pedro@codesourcery.com>
Maciej W. Rozycki <macro@codesourcery.com>
* remote.c (putpkt_for_catch_errors): Remove function.
(remote_kill): Handle TARGET_CLOSE_ERROR from the kill packet
gracefully.
In remote-notif.c:handle_notification, we have a loop,
for (i = 0; i < ARRAY_SIZE (notifs); i++)
{
nc = notifs[i];
if (strncmp (buf, nc->name, strlen (nc->name)) == 0
&& buf[strlen (nc->name)] == ':')
break;
}
/* We ignore notifications we don't recognize, for compatibility
with newer stubs. */
if (nc == NULL)
return;
If the notification is not in the list 'notifs', the last entry is
used, which is wrong. It should be NULL. This patch fixes it.
gdb:
2013-12-02 Pedro Alves <palves@redhat.com>
PR remote/15974
* remote-notif.c (handle_notification): Return early if no
notification is found.
Not all systems supporting getrlimit also support RLIMIT_NOFILE
(Eg. All LynxOS systems appear to be lacking support for this).
So check its existance before using it.
gdb/ChangeLog:
* common/filestuff.c (fdwalk): Add "defined(RLIMIT_NOFILE)"
preprocessor check.
Simplify handling of auto-loaded objfile scripts.
.debug_gdb_scripts was always intended to handle more than just python,
thus the rightful home for the code that processes it is not in py-foo.c.
This is just a cleanup to move the code to a better place.
This also simplifies the handling of the ${objfile}-${suffix} auto-loaded
scripts. There's no need for each of the the handlers to do is-safe-to-load
checking, or call maybe_add_script. Doing it in the caller removes the
duplication.
* auto-load.h (script_language): New members name, auto_load_enabled.
Add missing comments on struct members.
(auto_load_objfile_script): Delete.
* auto-load.c: #include "cli/cli-cmds.h".
(auto_load_gdb_scripts_enabled): New function.
(script_language_gdb): Update, add new members.
(source_gdb_script_for_objfile): Simplify, auto-load safe-checking
and call to maybe_add_script moved to caller.
(auto_load_objfile_script_1): Auto-load safe-checking and
call to maybe_add_script moved here.
(auto_load_objfile_script): Make static. Early exit if support for
scripting language hasn't been compiled in, or auto-loading has been
disabled.
(source_section_scripts): Argument "source_name" renamed to
"section_name". All uses updated. Replace uses of AUTO_SECTION_NAME
with section_name. Skip loading script if support for scripting
language hasn't been compiled in, or auto-loading has been disabled.
Call language->source_script_for_objfile instead of calling
source_python_script_for_objfile directly.
(load_auto_scripts_for_objfile): Update.
* python/py-auto-load.c: Delete #include "cli/cli-cmds.h".
(gdbpy_load_auto_script_for_objfile): Delete.
(auto_load_python_scripts_enabled): New function.
(script_language_python): Update, add new members.
(gdbpy_script_language_defn): New function.
* python/python.h (gdbpy_load_auto_scripts_for_objfile): Delete.
(gdbpy_script_language_defn): Declare.
* auto-load.c (AUTO_SECTION_NAME): Moved here and renamed from
py-auto-load.c, GDBPY_AUTO_SECTION_NAME.
(source_section_scripts): Moved here from py-auto-load.c.
(auto_load_section_scripts): Ditto.
* python/py-auto-load.c (GDBPY_AUTO_SECTION_NAME): Moved to
auto-load.c, renamed AUTO_SECTION_NAME.
(source_section_scripts, auto_load_section_scripts): Moved to
auto-load.c.
This commit removes the "#include gdb_string.h" from gdbarch.sh, fixing
a small nit caused by Tom's commit
0e9f083f4c.
Checked-in as obvious.
2013-11-29 Sergio Durigan Junior <sergiodj@redhat.com>
* gdbarch.sh: Remove include of "gdb_string.h", replace by
<string.h>.
Unfortunately, UNWIND_NULL_ID is exported to Python as
gdb.FRAME_UNWIND_NULL_ID so we can't really eliminate it.
(I'd assume scripts just check the result of Frame.unwind_stop_reason,
and compare it to gdb.FRAME_UNWIND_NO_REASON. That at most, they'll
pass the result of Frame.unwind_stop_reason to
gdb.frame_stop_reason_string. I'd prefer to just get rid of it, but
because we make an API promise, we get to keep this around for
compatibility, in case a script does refer to gdb.FRAME_UNWIND_NULL_ID
directly.)
gdb/
2013-11-29 Pedro Alves <palves@redhat.com>
* unwind_stop_reasons.def (UNWIND_NULL_ID): Update comment.
gdb/doc/
2013-11-29 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Frames In Python) <gdb.FRAME_UNWIND_NULL_ID>:
Update comment.
The memory management of bp_location->target_info.conditions|tcommands
is currently a little fragile. If the target reports support for
target conditions or commands, and then target side breakpoint support
is disabled, or some error is thrown before remote_add_target_side_XXX
is called, we'll leak these lists. This patch makes us free these
lists when the locations are deleted, and also, just before recreating
the commands|conditions lists.
Tested on x86_64 Fedora 17, native and gdbserver.
gdb/
2013-11-29 Pedro Alves <palves@redhat.com>
* breakpoint.c (build_target_condition_list): Release previous
conditions.
(build_target_command_list): Release previous commands.
(bp_location_dtor): Release target conditions and commands.
* remote.c (remote_add_target_side_condition): Don't release
conditions.
(remote_add_target_side_commands): Don't release commands.
GDB on x86_64-linux is unable to disassemble on core-file target.
$ ./gdb ./testsuite/gdb.base/corefile
(gdb) core-file ./testsuite/gdb.base/corefile.core
(gdb) disassemble main
Dump of assembler code for function main:
0x0000000000400976 <+0>: Cannot access memory at address 0x400976
However, it works if we turn code-cache off.
(gdb) set code-cache off
(gdb) disassemble main,+4
Dump of assembler code from 0x400976 to 0x40097a:
0x0000000000400976 <main+0>: push %rbp
0x0000000000400977 <main+1>: mov %rsp,%rbp
End of assembler dump.
When code-cache is off, GDB will iterate target_ops from top to bottom
and call to_xfer_partial. When current_target is "core", it will call
to_xfer_partial of target "exec", which reads the contents for
disassemble. However, dcache uses TARGET_OBJECT_RAW_MEMORY to read,
but target_xfer_partial doesn't delegate requests to beneath for
TARGET_OBJECT_RAW_MEMORY.
This patch factors out the iteration from top to bottom to a new
function, raw_memory_xfer_partial, and use it for
TARGET_OBJECT_RAW_MEMORY.
Regression tested on x86_64-linux.
gdb:
2013-11-29 Yao Qi <yao@codesourcery.com>
Pedro Alves <palves@redhat.com>
* dcache.c (dcache_read_line): Use current_target.beneath
instead of ¤t_target.
* target.c (memory_xfer_partial_1): Factor code out to ...
(raw_memory_xfer_partial): ... it. New function.
(target_xfer_partial): Call raw_memory_xfer_partial if OBJECT
is TARGET_OBJECT_RAW_MEMORY.
* breakpoint.h (gdbpy_breakpoint_object): Renamed from
breakpoint_object. All uses updated.
* python/python-internal.h (gdbpy_breakpoint_object): Renamed from
breakpoint_object. All uses updated.
* python.c (*): All uses of breakpoint_object updated.
* python.h (*): All uses of breakpoint_object updated.
* python/py-breakpoint.c (*): All uses of breakpoint_object updated.
* python/py-finishbreakpoint.c (*): Ditto.
When printing an entirely optimized out structure/class/union, we
print a single <optimized out> instead of printing <optimized out> for
each field.
This patch makes an entirely unavailable structure/class/union be
likewise displayed with a single "<unavailable>" rather than the whole
object with all fields <unavailable>.
This seems good because this way the user can quickly tell whether the
whole value is unavailable, rather than having to skim all fields.
Consistency with optimized out values also seems to be a good thing to
have.
A few updates to gdb.trace/unavailable.exp where required.
Tested on x86_64 Fedora 17, native gdbserver.
gdb/
2013-11-28 Andrew Burgess <aburgess@broadcom.com>
Pedro Alves <palves@redhat.com>
* valprint.c (value_check_printable): If the value is entirely
unavailable, print a single "<unavailable>" instead of printing
all subfields.
gdb/testsuite/
2013-11-28 Andrew Burgess <aburgess@broadcom.com>
* gdb.trace/unavailable.exp (gdb_collect_args_test): Update
expected results.
(gdb_collect_locals_test): Likewise.
(gdb_collect_globals_test): Likewise.
The stop_reason != UNWIND_NO_REASON doesn't currently have "set debug
frame" output. This patch makes it print the stop_reason enum value
as a string.
gdb/
2013-11-28 Pedro Alves <palves@redhat.com>
* frame.c (get_prev_frame_1) <stop_reason != UNWIND_NO_REASON>:
Add "set debug frame" output.
(frame_stop_reason_symbol_string): New function.
After the previous patch, it should be clear that the
this_frame->unwind->stop_reason check is redundant with the
outer_frame_id check just below. We can now move the frame_id_eq
comparison to the default this_frame->unwind->stop_reason callback.
Tested on x86_64 Fedora 17.
gdb/
2013-11-28 Pedro Alves <palves@redhat.com>
* frame-unwind.c (default_frame_unwind_stop_reason): Return
UNWIND_OUTERMOST if the frame's ID is outer_frame_id.
* frame.c (get_prev_frame_1): Remove outer_frame_id check.
- The UNWIND_NULL_ID check in get_prev_frame_1 used to really be
against null_frame_id, back before we had outer_frame_id. We didn't
have UNWIND_OUTERMOST when outer_frame_id was added, but we do now,
and it's more accurate.
- It used to be necessary to check for the sentinel frame explicitly
because that uses null_frame_id for frame id. Since no other frame
can have that id nowadays (it's asserted by compute_frame_id), we
don't need that explicit check.
Tested on x86_64 Fedora 17.
gdb/
2013-11-28 Pedro Alves <palves@redhat.com>
* frame.c (get_prev_frame_1): If the frame id is outer_frame_id,
set the unwind stop reason to UNWIND_OUTERMOST, not
UNWIND_NULL_ID. Remove explicit check for sentinel frame.
Another spot that missed the previous related text adjustments.
Tested on x86_64 Fedora 17.
gdb/
2013-11-28 Pedro Alves <palves@redhat.com>
* frame.c (frame_unwind_register): Say the register was "not
saved" instead of "optimized out".
Avoid false positives if the search pattern "lose" is found in path
descriptions in comments generated by the preprocessor.
See <https://sourceware.org/bugzilla/show_bug.cgi?id=16152>.
gdb/
2013-11-27 Steffen Sledz <sledz@dresearch-fe.de>
* configure.ac: Tighten Cygwin detection check.
* configure: Rebuild.
value_of_register_lazy uses the type of REGNUM in FRAME, but given
multi-arch, the arch of FRAME might be different from the previous
frame's arch, and therefore the type of register REGNUM should be
retrieved from the unwound arch. This used to be correct before the
previous change.
Tested on x86_64 Fedora 17.
gdb/
2013-11-27 Pedro Alves <palves@redhat.com>
* frame-unwind.c (frame_unwind_got_optimized): Use the type of the
register in the previous frame's arch.
"set debug frame 1" is printing "<optimized out>" for not saved
registers. That's because the unwinders are returning optimized out
not_lval values instead of optimized out lval_register values. "<not
saved>" is how val_print_optimized_out prints lval_register values.
...
- { frame_unwind_register_value (frame=0,regnum=7(rsp),...) -> <optimized out> }
+ { frame_unwind_register_value (frame=0,regnum=7(rsp),...) -> <not saved> }
...
Tested on x86_64 Fedora 17.
2013-11-27 Pedro Alves <palves@redhat.com>
* frame-unwind.c (frame_unwind_got_optimized): Return
an lval_register value instead of a not_lval value.
If a value is entirely optimized out, then there's nothing for
value_fetch_lazy to fetch. Sequences like:
if (value_lazy (retval))
value_fetch_lazy (retval);
End up allocating the value contents buffer, wasting memory, for no
use.
gdb/ChangeLog
2013-11-26 Andrew Burgess <aburgess@broadcom.com>
* value.c (allocate_optimized_out_value): Mark value as non-lazy.
This reverts da2b2fdf57 and some
follow-up patches. They were incorrect.
2013-11-26 Tom Tromey <tromey@redhat.com>
* dwarf2-frame.c (dwarf2_frame_cache): Revert patch from
2013-11-22.
2013-11-26 Tom Tromey <tromey@redhat.com>
* gdb.dwarf2/dw2-unspecified-ret-addr.S: Remove.
* gdb.dwarf2/dw2-unspecified-ret-addr.c: Remove.
* gdb.dwarf2/dw2-unspecified-ret-addr.exp: Remove.
The MPX patch has broken the I386_XSTATE_SIZE macro. For AVX machines,
it ends up returning I386_XSTATE_SSE_SIZE. Where it first reads
I386_XSTATE_AVX_SIZE, it should have read I386_XSTATE_AVX:
#define I386_XSTATE_SIZE(XCR0) \
(((XCR0) & I386_XSTATE_BNDCFG) != 0 ? I386_XSTATE_BNDCFG_SIZE \
: (((XCR0) & I386_XSTATE_BNDREGS) != 0 ? I386_XSTATE_BNDCFG_SIZE \
- : (((XCR0) & I386_XSTATE_AVX_SIZE) != 0 ? I386_XSTATE_AVX_SIZE \
+ : (((XCR0) & I386_XSTATE_AVX) != 0 ? I386_XSTATE_AVX_SIZE \
: I386_XSTATE_SSE_SIZE)))
The patch goes a step further and improves readability of the macro,
by adding a couple other auxiliary macros.
2013-11-26 Walfred Tedeschi <walfred.tedeschi@intel.com>
* i386-xstate.h (I386_XSTATE_MPX): New Macro.
(I386_XSTATE_MPX_MASK): Makes use of I386_XSTATE_MPX.
(HAS_MPX): New macro.
(HAS_AVX): New macro.
(I386_XSTATE_SIZE): Uses HAS_MPX and HAS_AVX.
This patch teaches "disassembly" use code cache mechanism to read
target code.
gdb:
2013-11-24 Yao Qi <yao@codesourcery.com>
* disasm.c (dis_asm_read_memory): Call target_read_code
instead of target_read_memory.
Similar to stack cache, in this patch, we add
TARGET_OBJECT_CODE_MEMORY to read code from target and add a new
option "set code-cache on|off" to optimize code accesses by
using the target memory cache.
In V4:
- Remove "without affecting correctness" from NEWS and doc.
- Replace "ON" with "on" in doc.
- "access" -> "accesses".
In V3:
- Rename functions and variables.
- Update command help, doc and NEWS entry.
- Invalidate cache on option transitions, to align with
the behaviour of "stack-cache". Since cache invalidation is
transparent to users, users don't know option "stack-cache"
transitions cause code cache invalidation.
V2 was reviewed by Doug. There are some changes in V3, so I post it
here.
gdb:
2013-11-24 Yao Qi <yao@codesourcery.com>
* NEWS: Add note on new "set code-cache" option.
* target-dcache.c (code_cache_enabled_1): New variable.
(code_cache_enabled): New variable.
(show_code_cache, set_code_cache): New function.
(code_cache_enabled_p): New function.
(_initialize_target_dcache): Register command.
* target-dcache.h (code_cache_enabled_p): Declare.
* target.c (memory_xfer_partial_1):Handle
TARGET_OBJECT_CODE_MEMORY and code_cache_enabled.
(target_read_code): New function.
* target.h (enum target_object) <TARGET_OBJECT_CODE_MEMORY>:
New.
(target_read_code): Declare.
gdb/doc:
2013-11-24 Yao Qi <yao@codesourcery.com>
* gdb.texinfo (Caching Remote Data): Document new
"set/show stack-cache" option.
Hi,
This patch does some renamings on "stack-cache" related functions and
variables.
In the review to "code cache" series v2, we have some discussions on the
name of predicate function 'stack_cache_enabled', and have some options,
1 keep it unchanged, as it is already a predicate clearly,
2 rename it to stack_cache_enabled_p,
3 rename it to enable_stack_cache_p,
I choose #2, because 'stack_cache_enabled' is a predicate, but
it's better to add "_p" suffix to stress this. There are some other
similar patterns used in GDB source, such as unop_user_defined_p
and agent_loaded_p.
Then, I have to rename variable stack_cache_enabled_p to something
else. The option is "stack-cache", so I'd like to name the variable
associated with this command as "stack_cache". Similarly, the commands
associated with this command should be renamed to "set_stack_cache"
and "show_stack_cache" respectively.
gdb:
2013-11-24 Yao Qi <yao@codesourcery.com>
* target-dcache.c (stack_cache_enabled_p_1): Rename to ...
(stack_cache_enabled_1): ... this. New variable.
(stack_cache_enabled_p): Rename to ...
(stack_cache_enabled): ... this. New variable.
(set_stack_cache_enabled_p): Rename to ...
(set_stack_cache): ... this. Update caller.
(show_stack_cache_enabled_p): Rename to ...
(show_stack_cache): ... this. Update caller.
(stack_cache_enabled): Rename to ...
(stack_cache_enabled_p): ... this. Update caller.
(_initialize_target_dcache): Replace "data cache" with
"target memory cache".
* target-dcache.h (stack_cache_enabled): Remove declaration.
(stack_cache_enabled_p): Add declaration.
* cli/cli-script.c (multi_line_command_p): New function.
(recurse_read_control_structure, read_command_lines_1): Call it.
(execute_control_command): Consistently have a blank line between
each case.
PR gdb/16196:
* valprint.c (read_string): Set new variable fetchlen based on
fetchlimit and size. Use it in call to partial_memory_read.
Update comment.
PR gdb/16196:
* valprint.c (read_string): Set new variable fetchlen based on
fetchlimit and size. Use it in call to partial_memory_read.
Update comment.
Debugging PR 16155 further, I found that the DWARF unwinder found the
function in question, but thought it had no registers saved
(fs->regs.num_regs == 0).
It seems to me that if a frame does not specify the return address
column, or if the return address column is explicitly marked as
DWARF2_FRAME_REG_UNSPECIFIED, then we should set the
"undefined_retaddr" flag and let the DWARF unwinder gracefully stop.
This patch implements that idea.
With this patch the backtrace works properly:
(gdb) bt
#0 0x0000007fb7ed485c in nanosleep () from /lib64/libc.so.6
#1 0x0000007fb7ed4508 in sleep () from /lib64/libc.so.6
#2 0x00000000004008bc in thread_function (arg=0x4) at threadapply.c:73
#3 0x0000007fb7fad950 in start_thread () from /lib64/libpthread.so.0
#4 0x0000007fb7f0956c in clone () from /lib64/libc.so.6
2013-11-22 Tom Tromey <tromey@redhat.com>
PR backtrace/16155:
* dwarf2-frame.c (dwarf2_frame_cache): Set undefined_retaddr if
the return address column is unspecified.
2013-11-22 Tom Tromey <tromey@redhat.com>
* gdb.dwarf2/dw2-bad-cfi.c: New file.
* gdb.dwarf2/dw2-bad-cfi.exp: New file.
* gdb.dwarf2/dw2-bad-cfi.S: New file.
If value_fetch_lazy loops infinitely while unwrapping lval_register
values, it means we either somehow ended up with two frames with the
same ID in the frame chain, or some code is trying to unwind behind
get_prev_frame's back (e.g., a frame unwind sniffer trying to unwind).
In any case, it should always be an internal error to end up in this
situation.
This patch adds a check and throws an internal error if the same frame
is returned.
2013-11-22 Tom Tromey <tromey@redhat.com>
Pedro Alves <palves@redhat.com>
PR backtrace/16155
* value.c (value_fetch_lazy): Internal error if
get_frame_register_value returns the same register.
Given we already have the frame id stash, which holds the ids of all
frames in the chain, detecting corrupted stacks with wide stack cycles
with non-consecutive dup frame ids is just as cheap as just detecting
cycles in consecutive frames:
#0 frame_id1
#1 frame_id2
#2 frame_id3
#3 frame_id1
#4 frame_id2
#5 frame_id3
#6 frame_id1
... forever ...
We just need to check whether the stash already knows about a given
frame id instead of comparing the ids of the previous/this frames.
Tested on x86_64 Fedora 17.
gdb/
2013-11-22 Pedro Alves <palves@redhat.com>
Tom Tromey <tromey@redhat.com>
* frame.c (frame_stash_add): Now returns whether a frame with the
same ID was already known.
(compute_frame_id): New function, factored out from get_frame_id.
(get_frame_id): No longer lazilly compute the frame id here.
(get_prev_frame_if_no_cycle): New function. Detects wider stack
cycles.
(get_prev_frame_1): Use it instead of get_prev_frame_raw directly,
and checking for stack cycles here.
The UNWIND_SAME_ID check is done between THIS_FRAME and the next frame
when we go try to unwind the previous frame. But at this point, it's
already too late -- we ended up with two frames with the same ID in
the frame chain. Each frame having its own ID is an invariant assumed
throughout GDB. This patch applies the UNWIND_SAME_ID detection
earlier, right after the previous frame is unwound, discarding the dup
frame if a cycle is detected.
The patch includes a new test that fails before the change. Before
the patch, the test causes an infinite loop in GDB, after the patch,
the UNWIND_SAME_ID logic kicks in and makes the backtrace stop with:
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
The test uses dwarf CFI to emulate a corrupted stack with a cycle. It
has a function with registers marked DW_CFA_same_value (most
importantly RSP/RIP), so that GDB computes the same ID for that frame
and its caller. IOW, something like this:
#0 - frame_id_1
#1 - frame_id_2
#2 - frame_id_3
#3 - frame_id_4
#4 - frame_id_4 <<<< outermost (UNWIND_SAME_ID).
(The test's code is just a copy of dw2-reg-undefined.S /
dw2-reg-undefined.c, adjusted to use DW_CFA_same_value instead of
DW_CFA_undefined, and to mark a different set of registers.)
The infinite loop is here, in value_fetch_lazy:
while (VALUE_LVAL (new_val) == lval_register && value_lazy (new_val))
{
frame = frame_find_by_id (VALUE_FRAME_ID (new_val));
...
new_val = get_frame_register_value (frame, regnum);
}
get_frame_register_value can return a lazy register value pointing to
the next frame. This means that the register wasn't clobbered by
FRAME; the debugger should therefore retrieve its value from the next
frame.
To be clear, get_frame_register_value unwinds the value in question
from the next frame:
struct value *
get_frame_register_value (struct frame_info *frame, int regnum)
{
return frame_unwind_register_value (frame->next, regnum);
^^^^^^^^^^^
}
In other words, if we get a lazy lval_register, it should have the
frame ID of the _next_ frame, never of FRAME.
At this point in value_fetch_lazy, the whole relevant chunk of the
stack up to frame #4 has already been unwound. The loop always
"unlazies" lval_registers in the "next/innermost" direction, not in
the "prev/unwind further/outermost" direction.
So say we're looking at frame #4. get_frame_register_value in frame
#4 can return a lazy register value of frame #3. So the next
iteration, frame_find_by_id tries to read the register from frame #3.
But, since frame #4 happens to have same id as frame #3,
frame_find_by_id returns frame #4 instead. Rinse, repeat, and we have
an infinite loop.
This is an old latent problem, exposed by the recent addition of the
frame stash. Before we had a stash, frame_find_by_id(frame_id_4)
would walk over all frames starting at the current frame, and would
always find #3 first. The stash happens to return #4 instead:
struct frame_info *
frame_find_by_id (struct frame_id id)
{
struct frame_info *frame, *prev_frame;
...
/* Try using the frame stash first. Finding it there removes the need
to perform the search by looping over all frames, which can be very
CPU-intensive if the number of frames is very high (the loop is O(n)
and get_prev_frame performs a series of checks that are relatively
expensive). This optimization is particularly useful when this function
is called from another function (such as value_fetch_lazy, case
VALUE_LVAL (val) == lval_register) which already loops over all frames,
making the overall behavior O(n^2). */
frame = frame_stash_find (id);
if (frame)
return frame;
for (frame = get_current_frame (); ; frame = prev_frame)
{
gdb/
2013-11-22 Pedro Alves <palves@redhat.com>
PR 16155
* frame.c (get_prev_frame_1): Do the UNWIND_SAME_ID check between
this frame and the new previous frame, not between this frame and
the next frame.
gdb/testsuite/
2013-11-22 Pedro Alves <palves@redhat.com>
PR 16155
* gdb.dwarf2/dw2-dup-frame.S: New file.
* gdb.dwarf2/dw2-dup-frame.c: New file.
* gdb.dwarf2/dw2-dup-frame.exp: New file.
Two rationales, same patch.
TL;DR 1:
dwarf2_frame_cache recursion is evil. dwarf2_frame_cache calls
dwarf2_tailcall_sniffer_first which then recurses into
dwarf2_frame_cache.
TL;DR 2:
An unwinder trying to unwind is evil. dwarf2_frame_sniffer calls
dwarf2_frame_cache which calls dwarf2_tailcall_sniffer_first which
then tries to unwind the PC of the previous frame.
Avoid all that by deferring dwarf2_tailcall_sniffer_first until it's
really necessary.
Rationale 1
===========
A frame sniffer should not try to unwind, because that bypasses all
the validation checks done by get_prev_frame. The UNWIND_SAME_ID
scenario is one such case where GDB is currently broken because (in
part) of this (the next patch adds a test that would fail without
this).
GDB goes into an infinite loop in value_fetch_lazy, here:
while (VALUE_LVAL (new_val) == lval_register && value_lazy (new_val))
{
frame = frame_find_by_id (VALUE_FRAME_ID (new_val));
...
new_val = get_frame_register_value (frame, regnum);
}
(top-gdb) bt
#0 value_fetch_lazy (val=0x11516d0) at ../../src/gdb/value.c:3510
#1 0x0000000000584bd8 in value_optimized_out (value=0x11516d0) at ../../src/gdb/value.c:1096
#2 0x00000000006fe7a1 in frame_register_unwind (frame=0x1492600, regnum=16, optimizedp=0x7fffffffcdec, unavailablep=0x7fffffffcde8, lvalp=0x7fffffffcdd8, addrp=
0x7fffffffcde0, realnump=0x7fffffffcddc, bufferp=0x7fffffffce10 "@\316\377\377\377\177") at ../../src/gdb/frame.c:940
#3 0x00000000006fea3a in frame_unwind_register (frame=0x1492600, regnum=16, buf=0x7fffffffce10 "@\316\377\377\377\177") at ../../src/gdb/frame.c:990
#4 0x0000000000473b9b in i386_unwind_pc (gdbarch=0xf54660, next_frame=0x1492600) at ../../src/gdb/i386-tdep.c:1771
#5 0x0000000000601dfa in gdbarch_unwind_pc (gdbarch=0xf54660, next_frame=0x1492600) at ../../src/gdb/gdbarch.c:2870
#6 0x0000000000693db5 in dwarf2_tailcall_sniffer_first (this_frame=0x1492600, tailcall_cachep=0x14926f0, entry_cfa_sp_offsetp=0x7fffffffcf00)
at ../../src/gdb/dwarf2-frame-tailcall.c:389
#7 0x0000000000690928 in dwarf2_frame_cache (this_frame=0x1492600, this_cache=0x1492618) at ../../src/gdb/dwarf2-frame.c:1245
#8 0x0000000000690f46 in dwarf2_frame_sniffer (self=0x8e4980, this_frame=0x1492600, this_cache=0x1492618) at ../../src/gdb/dwarf2-frame.c:1423
#9 0x000000000070203b in frame_unwind_find_by_frame (this_frame=0x1492600, this_cache=0x1492618) at ../../src/gdb/frame-unwind.c:112
#10 0x00000000006fd681 in get_frame_id (fi=0x1492600) at ../../src/gdb/frame.c:408
#11 0x00000000007006c2 in get_prev_frame_1 (this_frame=0xdc1860) at ../../src/gdb/frame.c:1826
#12 0x0000000000700b7a in get_prev_frame (this_frame=0xdc1860) at ../../src/gdb/frame.c:2056
#13 0x0000000000514588 in frame_info_to_frame_object (frame=0xdc1860) at ../../src/gdb/python/py-frame.c:322
#14 0x000000000051784c in bootstrap_python_frame_filters (frame=0xdc1860, frame_low=0, frame_high=-1) at ../../src/gdb/python/py-framefilter.c:1396
#15 0x0000000000517a6f in apply_frame_filter (frame=0xdc1860, flags=7, args_type=CLI_SCALAR_VALUES, out=0xed7a90, frame_low=0, frame_high=-1)
at ../../src/gdb/python/py-framefilter.c:1492
#16 0x00000000005e77b0 in backtrace_command_1 (count_exp=0x0, show_locals=0, no_filters=0, from_tty=1) at ../../src/gdb/stack.c:1777
#17 0x00000000005e7c0f in backtrace_command (arg=0x0, from_tty=1) at ../../src/gdb/stack.c:1891
#18 0x00000000004e37a7 in do_cfunc (c=0xda4fa0, args=0x0, from_tty=1) at ../../src/gdb/cli/cli-decode.c:107
#19 0x00000000004e683c in cmd_func (cmd=0xda4fa0, args=0x0, from_tty=1) at ../../src/gdb/cli/cli-decode.c:1882
#20 0x00000000006f35ed in execute_command (p=0xcc66c2 "", from_tty=1) at ../../src/gdb/top.c:468
#21 0x00000000005f8853 in command_handler (command=0xcc66c0 "bt") at ../../src/gdb/event-top.c:435
#22 0x00000000005f8e12 in command_line_handler (rl=0xfe05f0 "@") at ../../src/gdb/event-top.c:632
#23 0x000000000074d2c6 in rl_callback_read_char () at ../../src/readline/callback.c:220
#24 0x00000000005f8375 in rl_callback_read_char_wrapper (client_data=0x0) at ../../src/gdb/event-top.c:164
#25 0x00000000005f876a in stdin_event_handler (error=0, client_data=0x0) at ../../src/gdb/event-top.c:375
#26 0x00000000005f72fa in handle_file_event (data=...) at ../../src/gdb/event-loop.c:768
#27 0x00000000005f67a3 in process_event () at ../../src/gdb/event-loop.c:342
#28 0x00000000005f686a in gdb_do_one_event () at ../../src/gdb/event-loop.c:406
#29 0x00000000005f68bb in start_event_loop () at ../../src/gdb/event-loop.c:431
#30 0x00000000005f83a7 in cli_command_loop (data=0x0) at ../../src/gdb/event-top.c:179
#31 0x00000000005eeed3 in current_interp_command_loop () at ../../src/gdb/interps.c:327
#32 0x00000000005ef8ff in captured_command_loop (data=0x0) at ../../src/gdb/main.c:267
#33 0x00000000005ed2f6 in catch_errors (func=0x5ef8e4 <captured_command_loop>, func_args=0x0, errstring=0x8b6554 "", mask=RETURN_MASK_ALL)
at ../../src/gdb/exceptions.c:524
#34 0x00000000005f0d21 in captured_main (data=0x7fffffffd9e0) at ../../src/gdb/main.c:1067
#35 0x00000000005ed2f6 in catch_errors (func=0x5efb9b <captured_main>, func_args=0x7fffffffd9e0, errstring=0x8b6554 "", mask=RETURN_MASK_ALL)
at ../../src/gdb/exceptions.c:524
#36 0x00000000005f0d57 in gdb_main (args=0x7fffffffd9e0) at ../../src/gdb/main.c:1076
#37 0x000000000045bb6a in main (argc=4, argv=0x7fffffffdae8) at ../../src/gdb/gdb.c:34
(top-gdb)
GDB is trying to unwind the PC register of the previous frame (frame
#5 above), starting from the frame being sniffed (the THIS frame).
But the THIS frame's unwinder says the PC of the previous frame is
actually the same as the previous's frame's next frame (which is the
same frame we started with, the THIS frame), therefore it returns an
lval_register lazy value with frame set to THIS frame. And so the
value_fetch_lazy loop never ends.
Rationale 2
===========
As an experiment, I tried making dwarf2-frame.c:read_addr_from_reg use
address_from_register. That caused a bunch of regressions, but it
actually took me a long while to figure out what was going on. Turns
out dwarf2-frame.c:read_addr_from_reg is called while computing the
frame's CFA, from within dwarf2_frame_cache. address_from_register
wants to create a register with frame_id set to the frame being
constructed. To create the frame id, we again call dwarf2_frame_cache,
which given:
static struct dwarf2_frame_cache *
dwarf2_frame_cache (struct frame_info *this_frame, void **this_cache)
{
...
if (*this_cache)
return *this_cache;
returns an incomplete object to the caller:
static void
dwarf2_frame_this_id (struct frame_info *this_frame, void **this_cache,
struct frame_id *this_id)
{
struct dwarf2_frame_cache *cache =
dwarf2_frame_cache (this_frame, this_cache);
...
(*this_id) = frame_id_build (cache->cfa, get_frame_func (this_frame));
}
As cache->cfa is still 0 (we were trying to compute it!), and
get_frame_id recalls this id from here on, we end up with a broken
frame id in recorded for this frame. Later, when inspecting locals,
the dwarf machinery needs to know the selected frame's base, which
calls get_frame_base:
CORE_ADDR
get_frame_base (struct frame_info *fi)
{
return get_frame_id (fi).stack_addr;
}
which as seen above then returns 0 ...
So I gave up using address_from_register.
But, the pain of investigating this made me want to have GDB itself
assert that recursion never happens here. So I wrote a patch to do
that. But, it triggers on current mainline, because
dwarf2_tailcall_sniffer_first, called from dwarf2_frame_cache, unwinds
the this_frame.
A sniffer shouldn't be trying to unwind, exactly because of this sort
of tricky issue. The patch defers calling
dwarf2_tailcall_sniffer_first until it's really necessary, in
dwarf2_frame_prev_register (thus actually outside the sniffer path).
As this makes the call to dwarf2_frame_sniffer in dwarf2_frame_cache
unnecessary again, the patch removes that too.
Tested on x86_64 Fedora 17.
gdb/
2013-11-22 Pedro Alves <palves@redhat.com>
PR 16155
* dwarf2-frame.c (struct dwarf2_frame_cache)
<checked_tailcall_bottom, entry_cfa_sp_offset,
entry_cfa_sp_offset_p>: New fields.
(dwarf2_frame_cache): Adjust to use the new cache fields instead
of locals. Don't call dwarf2_tailcall_sniffer_first here.
(dwarf2_frame_prev_register): Call it here, but only once.
Two rationales, same patch.
TL;DR 1:
dwarf2_frame_cache recursion is evil. dwarf2_frame_cache calls
dwarf2_tailcall_sniffer_first which then recurses into
dwarf2_frame_cache.
TL;DR 2:
An unwinder trying to unwind is evil. dwarf2_frame_sniffer calls
dwarf2_frame_cache which calls dwarf2_tailcall_sniffer_first which
then tries to unwind the PC of the previous frame.
Avoid all that by deferring dwarf2_tailcall_sniffer_first until it's
really necessary.
Rationale 1
===========
A frame sniffer should not try to unwind, because that bypasses all
the validation checks done by get_prev_frame. The UNWIND_SAME_ID
scenario is one such case where GDB is currently broken because (in
part) of this (the next patch adds a test that would fail without
this).
GDB goes into an infinite loop in value_fetch_lazy, here:
while (VALUE_LVAL (new_val) == lval_register && value_lazy (new_val))
{
frame = frame_find_by_id (VALUE_FRAME_ID (new_val));
...
new_val = get_frame_register_value (frame, regnum);
}
(top-gdb) bt
#0 value_fetch_lazy (val=0x11516d0) at ../../src/gdb/value.c:3510
#1 0x0000000000584bd8 in value_optimized_out (value=0x11516d0) at ../../src/gdb/value.c:1096
#2 0x00000000006fe7a1 in frame_register_unwind (frame=0x1492600, regnum=16, optimizedp=0x7fffffffcdec, unavailablep=0x7fffffffcde8, lvalp=0x7fffffffcdd8, addrp=
0x7fffffffcde0, realnump=0x7fffffffcddc, bufferp=0x7fffffffce10 "@\316\377\377\377\177") at ../../src/gdb/frame.c:940
#3 0x00000000006fea3a in frame_unwind_register (frame=0x1492600, regnum=16, buf=0x7fffffffce10 "@\316\377\377\377\177") at ../../src/gdb/frame.c:990
#4 0x0000000000473b9b in i386_unwind_pc (gdbarch=0xf54660, next_frame=0x1492600) at ../../src/gdb/i386-tdep.c:1771
#5 0x0000000000601dfa in gdbarch_unwind_pc (gdbarch=0xf54660, next_frame=0x1492600) at ../../src/gdb/gdbarch.c:2870
#6 0x0000000000693db5 in dwarf2_tailcall_sniffer_first (this_frame=0x1492600, tailcall_cachep=0x14926f0, entry_cfa_sp_offsetp=0x7fffffffcf00)
at ../../src/gdb/dwarf2-frame-tailcall.c:389
#7 0x0000000000690928 in dwarf2_frame_cache (this_frame=0x1492600, this_cache=0x1492618) at ../../src/gdb/dwarf2-frame.c:1245
#8 0x0000000000690f46 in dwarf2_frame_sniffer (self=0x8e4980, this_frame=0x1492600, this_cache=0x1492618) at ../../src/gdb/dwarf2-frame.c:1423
#9 0x000000000070203b in frame_unwind_find_by_frame (this_frame=0x1492600, this_cache=0x1492618) at ../../src/gdb/frame-unwind.c:112
#10 0x00000000006fd681 in get_frame_id (fi=0x1492600) at ../../src/gdb/frame.c:408
#11 0x00000000007006c2 in get_prev_frame_1 (this_frame=0xdc1860) at ../../src/gdb/frame.c:1826
#12 0x0000000000700b7a in get_prev_frame (this_frame=0xdc1860) at ../../src/gdb/frame.c:2056
#13 0x0000000000514588 in frame_info_to_frame_object (frame=0xdc1860) at ../../src/gdb/python/py-frame.c:322
#14 0x000000000051784c in bootstrap_python_frame_filters (frame=0xdc1860, frame_low=0, frame_high=-1) at ../../src/gdb/python/py-framefilter.c:1396
#15 0x0000000000517a6f in apply_frame_filter (frame=0xdc1860, flags=7, args_type=CLI_SCALAR_VALUES, out=0xed7a90, frame_low=0, frame_high=-1)
at ../../src/gdb/python/py-framefilter.c:1492
#16 0x00000000005e77b0 in backtrace_command_1 (count_exp=0x0, show_locals=0, no_filters=0, from_tty=1) at ../../src/gdb/stack.c:1777
#17 0x00000000005e7c0f in backtrace_command (arg=0x0, from_tty=1) at ../../src/gdb/stack.c:1891
#18 0x00000000004e37a7 in do_cfunc (c=0xda4fa0, args=0x0, from_tty=1) at ../../src/gdb/cli/cli-decode.c:107
#19 0x00000000004e683c in cmd_func (cmd=0xda4fa0, args=0x0, from_tty=1) at ../../src/gdb/cli/cli-decode.c:1882
#20 0x00000000006f35ed in execute_command (p=0xcc66c2 "", from_tty=1) at ../../src/gdb/top.c:468
#21 0x00000000005f8853 in command_handler (command=0xcc66c0 "bt") at ../../src/gdb/event-top.c:435
#22 0x00000000005f8e12 in command_line_handler (rl=0xfe05f0 "@") at ../../src/gdb/event-top.c:632
#23 0x000000000074d2c6 in rl_callback_read_char () at ../../src/readline/callback.c:220
#24 0x00000000005f8375 in rl_callback_read_char_wrapper (client_data=0x0) at ../../src/gdb/event-top.c:164
#25 0x00000000005f876a in stdin_event_handler (error=0, client_data=0x0) at ../../src/gdb/event-top.c:375
#26 0x00000000005f72fa in handle_file_event (data=...) at ../../src/gdb/event-loop.c:768
#27 0x00000000005f67a3 in process_event () at ../../src/gdb/event-loop.c:342
#28 0x00000000005f686a in gdb_do_one_event () at ../../src/gdb/event-loop.c:406
#29 0x00000000005f68bb in start_event_loop () at ../../src/gdb/event-loop.c:431
#30 0x00000000005f83a7 in cli_command_loop (data=0x0) at ../../src/gdb/event-top.c:179
#31 0x00000000005eeed3 in current_interp_command_loop () at ../../src/gdb/interps.c:327
#32 0x00000000005ef8ff in captured_command_loop (data=0x0) at ../../src/gdb/main.c:267
#33 0x00000000005ed2f6 in catch_errors (func=0x5ef8e4 <captured_command_loop>, func_args=0x0, errstring=0x8b6554 "", mask=RETURN_MASK_ALL)
at ../../src/gdb/exceptions.c:524
#34 0x00000000005f0d21 in captured_main (data=0x7fffffffd9e0) at ../../src/gdb/main.c:1067
#35 0x00000000005ed2f6 in catch_errors (func=0x5efb9b <captured_main>, func_args=0x7fffffffd9e0, errstring=0x8b6554 "", mask=RETURN_MASK_ALL)
at ../../src/gdb/exceptions.c:524
#36 0x00000000005f0d57 in gdb_main (args=0x7fffffffd9e0) at ../../src/gdb/main.c:1076
#37 0x000000000045bb6a in main (argc=4, argv=0x7fffffffdae8) at ../../src/gdb/gdb.c:34
(top-gdb)
GDB is trying to unwind the PC register of the previous frame (frame
#5 above), starting from the frame being sniffed (the THIS frame).
But the THIS frame's unwinder says the PC of the previous frame is
actually the same as the previous's frame's next frame (which is the
same frame we started with, the THIS frame), therefore it returns an
lval_register lazy value with frame set to THIS frame. And so the
value_fetch_lazy loop never ends.
Rationale 2
===========
As an experiment, I tried making dwarf2-frame.c:read_addr_from_reg use
address_from_register. That caused a bunch of regressions, but it
actually took me a long while to figure out what was going on. Turns
out dwarf2-frame.c:read_addr_from_reg is called while computing the
frame's CFA, from within dwarf2_frame_cache. address_from_register
wants to create a register with frame_id set to the frame being
constructed. To create the frame id, we again call dwarf2_frame_cache,
which given:
static struct dwarf2_frame_cache *
dwarf2_frame_cache (struct frame_info *this_frame, void **this_cache)
{
...
if (*this_cache)
return *this_cache;
returns an incomplete object to the caller:
static void
dwarf2_frame_this_id (struct frame_info *this_frame, void **this_cache,
struct frame_id *this_id)
{
struct dwarf2_frame_cache *cache =
dwarf2_frame_cache (this_frame, this_cache);
...
(*this_id) = frame_id_build (cache->cfa, get_frame_func (this_frame));
}
As cache->cfa is still 0 (we were trying to compute it!), and
get_frame_id recalls this id from here on, we end up with a broken
frame id in recorded for this frame. Later, when inspecting locals,
the dwarf machinery needs to know the selected frame's base, which
calls get_frame_base:
CORE_ADDR
get_frame_base (struct frame_info *fi)
{
return get_frame_id (fi).stack_addr;
}
which as seen above then returns 0 ...
So I gave up using address_from_register.
But, the pain of investigating this made me want to have GDB itself
assert that recursion never happens here. So I wrote a patch to do
that. But, it triggers on current mainline, because
dwarf2_tailcall_sniffer_first, called from dwarf2_frame_cache, unwinds
the this_frame.
A sniffer shouldn't be trying to unwind, exactly because of this sort
of tricky issue. The patch defers calling
dwarf2_tailcall_sniffer_first until it's really necessary, in
dwarf2_frame_prev_register (thus actually outside the sniffer path).
As this makes the call to dwarf2_frame_sniffer in dwarf2_frame_cache
unnecessary again, the patch removes that too.
Tested on x86_64 Fedora 17.
gdb/
2013-11-22 Pedro Alves <palves@redhat.com>
PR 16155
* dwarf2-frame.c (struct dwarf2_frame_cache)
<checked_tailcall_bottom, entry_cfa_sp_offset,
entry_cfa_sp_offset_p>: New fields.
(dwarf2_frame_cache): Adjust to use the new cache fields instead
of locals. Don't call dwarf2_tailcall_sniffer_first here.
(dwarf2_frame_prev_register): Call it here, but only once.
is_intlike was mostly duplicating is_integral_type, with the exception
of the handling of TYPE_CODE_PTR when parameter PTR_OK is nonzero.
This patches deletes the is_intlike function, using is_integral_type
instead, and adjusting the two locations where this function gets
called.
The code should remain strictly equivalent.
gdb/ChangeLog:
* python/py-value.c (is_intlike): Delete.
(valpy_int): Replace use of CHECK_TYPEDEF and is_intlike
by use of is_integral_type.
(valpy_long): Replace use of CHECK_TYPEDEF and is_intlike
by use of is_integral_type and check for TYPE_CODE_PTR.
This fixes the mingw build breakage reported by Pierre.
I found that the gnulib strerror module somehow requires us to pull in
the gethostname module. However, pulling in the gethostname module
makes many things break.
I've sent a bug report to gnulib.
Meanwhile, removing the strerror module should not harm gdb and fixes
the build.
I'm checking this in.
2013-11-20 Tom Tromey <tromey@redhat.com>
* gnulib/update-gnulib.sh (IMPORTED_GNULIB_MODULES): Remove
strerror module.
* gnulib/aclocal.m4: Update.
* gnulib/config.in: Update.
* gnulib/configure: Update.
* gnulib/import/Makefile.am: Update.
* gnulib/import/Makefile.in: Update.
* gnulib/import/errno.in.h: Remove.
* gnulib/import/intprops.h: Remove.
* gnulib/import/m4/errno_h.m4: Remove.
* gnulib/import/m4/gnulib-cache.m4: Update.
* gnulib/import/m4/gnulib-comp.m4: Update.
* gnulib/import/m4/strerror.m4: Remove.
* gnulib/import/m4/sys_socket_h.m4: Remove.
* gnulib/import/strerror-override.c: Remove.
* gnulib/import/strerror-override.h: Remove.
* gnulib/import/strerror.c: Remove.
* gnulib/update-gnulib.sh: Update.
Boundary length is simpler implemented by means of a pretty
printer. This simplifies users life when examining a bound register.
Changelog:
2013-11-20 Walfred Tedeschi <walfred.tedeschi@intel.com>
* python/lib/gdb/command/bound_register.py: New file.
* gdb/data-directory/Makefile.in: copy bond_register.py to the right path to
be initialized at gdb startup.
testsuite/
* gdb.python/py-pp-maint.exp: Consider new pretty-print added for registers.
Change-Id: Id4f39845e5ece56c370a1fd4343648909f08b731
Signed-off-by: Walfred Tedeschi <walfred.tedeschi@intel.com>
Conflicts:
gdb/ChangeLog
2013-06-24 Walfred Tedeschi <walfred.tedeschi@intel.com>
* amd64-linux-nat.c (amd64_linux_gregset32_reg_offset):
Add MPX registers.
(amd64_linux_read_description): Add initialization for MPX and
AVX independently.
* amd64-linux-tdep.c: Includes features/i386/amd64-mpx-linux.c.
(amd64_linux_gregset_reg_offset): Add MPX registers.
(amd64_linux_core_read_description): Add initialization for MPX
registers.
(_initialize_amd64_linux_tdep): Initialize MPX targets.
* amd64-linux-tdep.h (AMD64_LINUX_RAX_REGNUM): Set it to the last
register on the list.
(tdesc_amd64_mpx_linux) Add new target for MPX.
* amd64-tdep.c: Includes features/i386/amd64-mpx.c.
(amd64_mpx_names): MPX register names.
(amd64_init_abi): Add MPX register while initializing the ABI.
(_initialize_amd64_tdep): Initialize MPX targets.
* amd64-tdep.h (amd64_regnum): Add MPX registers.
(AMD64_NUM_REGS): Set number of registers taking MPX into account.
Change-Id: I4a785c181e2fb45e4086650b2f87426caeb2f800
Signed-off-by: Walfred Tedeschi <walfred.tedeschi@intel.com>
Conflicts:
gdb/ChangeLog
2013-11-20 Walfred Tedeschi <walfred.tedeschi@intel.com>
* i386-linux-nat.c (GETXSTATEREGS_SUPPLIES): Add MPX
registers on the range of registers to be read from
xsave buffer.
(i386_linux_read_description): Add case for MPX.
* i386-linux-tdep.c: Include features/i386/i386-mpx-linux.c.
(i386_linux_gregset_reg_offset): Add MPX registers.
(i386_linux_core_read_description): Initialize also MPX.
(_initialize_i386_linux_tdep): Add mpx initialization.
* i386-tdep.h (gdbarch_tdep): Add fields bnd0r_regnum, bnd0_regnum,
mpx_register_names.
(i386_regnum): Add MPX registers.
(I386_MPX_NUM_REGS): New macro.
(i386_bnd_regnum_p): New function.
* i386-linux-tdep.h (I386_LINUX_NUM_REGS): Set
number of registers to be the number of BNDSTATUS.
(tdesc_i386_mpx_linux): Add description for MPX Linux registers.
* i386-tdep.c: Include features/i386/i386-mpx.c.
(i386_mpx_names): Add MPX register names array.
(i386_bnd_names): Add bnd pseudo register names array.
(i386_bndr_regnum_p): Lookup register numbers for bnd raw
registers.
(i386_bndr_regnum_p): Lookup register numbers for bnd raw registers.
(386_mpx_ctrl_regnum_p): Lookup register numbers for MPX control
registers.
(i386_bnd_type): New function.
(i386_pseudo_register_type): Use i386_bnd_type for bnd pseudo
register types.
(i386_pseudo_register_read_into_value): Add bnd case.
(i386_pseudo_register_write): Add bnd pseudo registers.
(i386_register_reggroup_p): Add MPX register to the group all.
(i386_validate_tdesc_p): Add MPX to the target description
validation.
(i386_pseudo_register_name): Add bnd pseudo registers.
(i386_gdbarch_init): Add MPX for architecture initialization.
(_initia_initialize_i386_tdep): Add mpx initialization.
* i387-tdep.c (xsave_mpx_offset): New vector for MPX offsets on
XSAVE buffer.
(XSAVE_MPX_ADDR): New macro.
(i387_supply_xsave): Add MPX case.
(i387_collect_xsave): Add MPX case.
* i387-tdep.h (I387_BND0R_REGNUM): New macro.
(I387_BNDCFGU_REGNUM): New macro.
(I387_NUM_MPX_REGS): New macro.
(I387_NUM_BND_REGS): New macro.
(I387_NUM_MPX_CTRL_REGS): New macro.
(I387_MPXEND_REGNUM): New macro.
* common/i386-xstate.h (I386_XSTATE_BNDREGS): New macro.
(I386_XSTATE_BNDCFG): Likewise.
(I386_XSTATE_MPX_MASK): Likewise.
(I386_XSTATE_ALL_MASK): New macro represents flags for all states.
(I386_XSTATE_BNDREGS_SIZE): New macro.
(I386_XSTATE_BNDCFG_SIZE): Likewise.
(I386_XSTATE_SIZE): Adapt for MPX.
(I386_XSTATE_MAX_SIZE): Likewise.
Change-Id: I9ddb7d49434d86fa18eb6b99515203d7c567aefd
Signed-off-by: Walfred Tedeschi <walfred.tedeschi@intel.com>
Conflicts:
gdb/ChangeLog
Bitfields are represented by intervals [start, begin]. It means that for an
interval comprised by only one bit start and end will be equal.
The present condition does not always hold. On the other hand in target-description.c
(tdesc_gdb_type) bitfield is created when "f->type" is null. The routine
maint_print_maint_print_c_tdesc_cmd is modified to follow the same strategy.
2013-11-20 Walfred Tedeschi <walfred.tedeschi@intel.com>
* target-descriptions.c (maint_print_maint_print_c_tdesc_cmd):
Modified logic of creating a bitfield to be in sync with
tdesc_gdb_type.
testsuite/
* gdb.xml/maint_print_struct.xml (bitfield): Added bitfield having
start and end equal 0.
Change-Id: I8c62db049995f0c0c30606d9696b86afe237cbb9
Since as far back as the beginning of the sourceware repository
the ARM port has printed an error "Infinite loop detected" when
the next_pc calculated is the same as the current one, for example
when encountering a branch to the current PC address.
This causes the test gdb.base/random-signal.exp as the error message
is not expected. I have not been able to find a good reason for the
message to be here so remove it and let the test pass.
gdb/ChangeLog:
2013-11-20 Will Newton <will.newton@linaro.org>
* arm-tdep.c (arm_get_next_pc): Remove "Infinite loop detected"
error message.
Hi,
Nowadays, 'target_dcache' is a global variable in GDB, which is not
necessary. It can be a per-address-space variable. In this patch, we
associate target_dcache to address_space.
gdb/doc:
2013-11-20 Yao Qi <yao@codesourcery.com>
* gdb.texinfo (Caching Target Data): Update doc for
per-address-space dcache.
gdb:
2013-11-20 Yao Qi <yao@codesourcery.com>
* progspace.h (struct address_space_data): Declare.
* target-dcache.c: Include "progspace.h".
(target_dache): Remove.
(target_dcache_aspace_key): New.
(target_dcache_cleanup): New function.
(target_dcache_init_p): Get data through
target_dcache_aspace_key.
(target_dcache_invalidate): Likewise.
(target_dcache_get): Likewise.
(target_dcache_get_or_init): Likewise.
(_initialize_target_dcache): Initialize
target_dcache_aspace_key.
After previous patch, 'target_dcache' is initialized lazily. It is
possible that 'target_dcache' is still NULL when GDB writes to memory.
In this case, update to 'target_dcache' can be skipped.
gdb:
2013-11-20 Yao Qi <yao@codesourcery.com>
* target.c (memory_xfer_partial_1): Update 'target_dcache' if
it is initialized.
Variable 'whatever' is not used at all. This patch is to remove it.
gdb/testsuite:
2013-11-19 Yao Qi <yao@codesourcery.com>
* lib/mi-support.exp (mi_child_regexp): Remove 'whatever'.
(mi_list_varobj_children_range): Likewise.
Hi,
"It's" should be "Its". This patch is to fix it. Committed as
obvious.
gdb:
2013-11-19 Yao Qi <yao@codesourcery.com>
* varobj.c (varobj_get_type): Fix typo.
Consider the following variable:
type Small is range -128 .. 127;
SR : Small := 48;
Trying to get its value as an integer within Python code yields:
(gdb) python sr = gdb.parse_and_eval('sr')
(gdb) python print int(sr)
Traceback (most recent call last):
File "<string>", line 1, in <module>
gdb.error: Cannot convert value to int.
Error while executing Python code.
This is happening because our variable is a range type, and
py-value's is_intlike does not handle TYPE_CODE_RANGE. This
patch fixes this.
gdb/ChangeLog:
* python/py-value.c (is_intlike): Add TYPE_CODE_RANGE handling.
gdb/testsuite/ChangeLog:
* gdb.ada/py_range: New testcase.
The corresponding gdb_dirent.h and gdb_stat.h no longer exist.
We rely on gnulib for those, now.
gdb/ChangeLog:
* contrib/ari/gdb_ari.sh: Remove checks for "dirent.h" and
"stat.h".
This patch is purely mechanical. It removes gdb_stat.h and changes
the code to use sys/stat.h.
2013-11-18 Tom Tromey <tromey@redhat.com>
* common/gdb_stat.h: Remove.
* ada-lang.c: Use sys/stat.h, not gdb_stat.h.
* common/filestuff.c: Use sys/stat.h, not gdb_stat.h.
* common/linux-osdata.c: Use sys/stat.h, not gdb_stat.h.
* corefile.c: Use sys/stat.h, not gdb_stat.h.
* ctf.c: Use sys/stat.h, not gdb_stat.h.
* darwin-nat.c: Use sys/stat.h, not gdb_stat.h.
* dbxread.c: Use sys/stat.h, not gdb_stat.h.
* dwarf2read.c: Use sys/stat.h, not gdb_stat.h.
* exec.c: Use sys/stat.h, not gdb_stat.h.
* gdbserver/linux-low.c: Use sys/stat.h, not gdb_stat.h.
* gdbserver/remote-utils.c: Use sys/stat.h, not gdb_stat.h.
* inf-child.c: Use sys/stat.h, not gdb_stat.h.
* jit.c: Use sys/stat.h, not gdb_stat.h.
* linux-nat.c: Use sys/stat.h, not gdb_stat.h.
* m68klinux-nat.c: Use sys/stat.h, not gdb_stat.h.
* main.c: Use sys/stat.h, not gdb_stat.h.
* mdebugread.c: Use sys/stat.h, not gdb_stat.h.
* mi/mi-cmd-env.c: Use sys/stat.h, not gdb_stat.h.
* nto-tdep.c: Use sys/stat.h, not gdb_stat.h.
* objfiles.c: Use sys/stat.h, not gdb_stat.h.
* procfs.c: Use sys/stat.h, not gdb_stat.h.
* remote-fileio.c: Use sys/stat.h, not gdb_stat.h.
* remote-mips.c: Use sys/stat.h, not gdb_stat.h.
* remote.c: Use sys/stat.h, not gdb_stat.h.
* rs6000-nat.c: Use sys/stat.h, not gdb_stat.h.
* sol-thread.c: Use sys/stat.h, not gdb_stat.h.
* solib-spu.c: Use sys/stat.h, not gdb_stat.h.
* source.c: Use sys/stat.h, not gdb_stat.h.
* symfile.c: Use sys/stat.h, not gdb_stat.h.
* symmisc.c: Use sys/stat.h, not gdb_stat.h.
* symtab.c: Use sys/stat.h, not gdb_stat.h.
* top.c: Use sys/stat.h, not gdb_stat.h.
* xcoffread.c: Use sys/stat.h, not gdb_stat.h.
configure doesn't check for sys/types.h any more, but it still tries
to use the result of the check. This removes that use as well.
2013-11-18 Tom Tromey <tromey@redhat.com>
* configure: Rebuild.
* configure.ac: Remove check of HAVE_SYS_TYPES_H.
We don't use the result of checking for unistd.h, so this removes the
check.
2013-11-18 Tom Tromey <tromey@redhat.com>
* configure: Rebuild.
* configure.ac: Don't check for unistd.h.
stdlib.h is universal as well, so there is no need to check for it.
2013-11-18 Tom Tromey <tromey@redhat.com>
* configure: Rebuild.
* configure.ac: Don't check for stdlib.h
* defs.h: Include stdlib.h unconditionally.
2013-11-18 Tom Tromey <tromey@redhat.com>
* configure: Rebuild.
* configure.ac: Don't check for stdlib.h.
* gdbreplay.c: Unconditionally include stdlib.h.
gdb already unconditionally includes stddef.h in many places.
I think there is no reason to check for its existence.
Also, Zack Weinberg's header file survey agrees:
http://hacks.owlfolio.org/header-survey/
This patch removes the configure check and the inclusion guards.
It also removes a redundant inclusion that I noticed in defs.h.
2013-11-18 Tom Tromey <tromey@redhat.com>
* config.in: Rebuild.
* configure: Rebuild.
* configure.ac: Don't check for stddef.h.
* defs.h: Unconditionally include stddef.h. Remove duplicate
inclusion.
This removes gdb_dirent.h and updates the code to use dirent.h
instead. It also removes the now-useless configure checks.
2013-11-18 Tom Tromey <tromey@redhat.com>
* common/common.m4 (GDB_AC_COMMON): Don't use AC_HEADER_DIRENT.
* common/gdb_dirent.h: Remove.
* common/filestuff.c: Use dirent.h.
* common/linux-osdata.c: Use dirent.h.
(NAMELEN): Define.
* config.in: Rebuild.
* configure: Rebuild.
* configure.ac: Don't use AC_HEADER_DIRENT.
* linux-fork.c: Use dirent.h
* linux-nat.c: Use dirent.h.
* nto-procfs.c: Use dirent.h.
* procfs.c: Use dirent.h.
2013-11-18 Tom Tromey <tromey@redhat.com>
* config.in: Rebuild.
* configure: Rebuild.
* configure.ac: Don't use AC_HEADER_DIRENT.
Now that we are using the gnulib string.h module, we don't need to
check for string.h or strings.h. This removes the last few checks
from the source and from the configure scripts.
2013-11-18 Tom Tromey <tromey@redhat.com>
* configure: Rebuild.
* common/common.m4 (GDB_AC_COMMON): Don't check for string.h or
strings.h.
2013-11-18 Tom Tromey <tromey@redhat.com>
* server.h: Don't check HAVE_STRING_H.
* gdbreplay.c: Don't check HAVE_STRING_H.
* configure: Rebuild.
This removes gdb_string.h. This patch is purely mechanical. I
created it by running the two commands:
git rm common/gdb_string.h
perl -pi -e's/"gdb_string.h"/<string.h>/;' *.[chyl] */*.[chyl]
2013-11-18 Tom Tromey <tromey@redhat.com>
* common/gdb_string.h: Remove.
* aarch64-tdep.c: Use string.h, not gdb_string.h.
* ada-exp.y: Use string.h, not gdb_string.h.
* ada-lang.c: Use string.h, not gdb_string.h.
* ada-lex.l: Use string.h, not gdb_string.h.
* ada-typeprint.c: Use string.h, not gdb_string.h.
* ada-valprint.c: Use string.h, not gdb_string.h.
* aix-thread.c: Use string.h, not gdb_string.h.
* alpha-linux-tdep.c: Use string.h, not gdb_string.h.
* alpha-mdebug-tdep.c: Use string.h, not gdb_string.h.
* alpha-nat.c: Use string.h, not gdb_string.h.
* alpha-osf1-tdep.c: Use string.h, not gdb_string.h.
* alpha-tdep.c: Use string.h, not gdb_string.h.
* alphanbsd-tdep.c: Use string.h, not gdb_string.h.
* amd64-dicos-tdep.c: Use string.h, not gdb_string.h.
* amd64-linux-nat.c: Use string.h, not gdb_string.h.
* amd64-linux-tdep.c: Use string.h, not gdb_string.h.
* amd64-nat.c: Use string.h, not gdb_string.h.
* amd64-sol2-tdep.c: Use string.h, not gdb_string.h.
* amd64fbsd-tdep.c: Use string.h, not gdb_string.h.
* amd64obsd-tdep.c: Use string.h, not gdb_string.h.
* arch-utils.c: Use string.h, not gdb_string.h.
* arm-linux-nat.c: Use string.h, not gdb_string.h.
* arm-linux-tdep.c: Use string.h, not gdb_string.h.
* arm-tdep.c: Use string.h, not gdb_string.h.
* arm-wince-tdep.c: Use string.h, not gdb_string.h.
* armbsd-tdep.c: Use string.h, not gdb_string.h.
* armnbsd-nat.c: Use string.h, not gdb_string.h.
* armnbsd-tdep.c: Use string.h, not gdb_string.h.
* armobsd-tdep.c: Use string.h, not gdb_string.h.
* avr-tdep.c: Use string.h, not gdb_string.h.
* ax-gdb.c: Use string.h, not gdb_string.h.
* ax-general.c: Use string.h, not gdb_string.h.
* bcache.c: Use string.h, not gdb_string.h.
* bfin-tdep.c: Use string.h, not gdb_string.h.
* breakpoint.c: Use string.h, not gdb_string.h.
* build-id.c: Use string.h, not gdb_string.h.
* buildsym.c: Use string.h, not gdb_string.h.
* c-exp.y: Use string.h, not gdb_string.h.
* c-lang.c: Use string.h, not gdb_string.h.
* c-typeprint.c: Use string.h, not gdb_string.h.
* c-valprint.c: Use string.h, not gdb_string.h.
* charset.c: Use string.h, not gdb_string.h.
* cli-out.c: Use string.h, not gdb_string.h.
* cli/cli-cmds.c: Use string.h, not gdb_string.h.
* cli/cli-decode.c: Use string.h, not gdb_string.h.
* cli/cli-dump.c: Use string.h, not gdb_string.h.
* cli/cli-interp.c: Use string.h, not gdb_string.h.
* cli/cli-logging.c: Use string.h, not gdb_string.h.
* cli/cli-script.c: Use string.h, not gdb_string.h.
* cli/cli-setshow.c: Use string.h, not gdb_string.h.
* cli/cli-utils.c: Use string.h, not gdb_string.h.
* coffread.c: Use string.h, not gdb_string.h.
* common/common-utils.c: Use string.h, not gdb_string.h.
* common/filestuff.c: Use string.h, not gdb_string.h.
* common/linux-procfs.c: Use string.h, not gdb_string.h.
* common/linux-ptrace.c: Use string.h, not gdb_string.h.
* common/signals.c: Use string.h, not gdb_string.h.
* common/vec.h: Use string.h, not gdb_string.h.
* core-regset.c: Use string.h, not gdb_string.h.
* corefile.c: Use string.h, not gdb_string.h.
* corelow.c: Use string.h, not gdb_string.h.
* cp-abi.c: Use string.h, not gdb_string.h.
* cp-support.c: Use string.h, not gdb_string.h.
* cp-valprint.c: Use string.h, not gdb_string.h.
* cris-tdep.c: Use string.h, not gdb_string.h.
* d-lang.c: Use string.h, not gdb_string.h.
* dbxread.c: Use string.h, not gdb_string.h.
* dcache.c: Use string.h, not gdb_string.h.
* demangle.c: Use string.h, not gdb_string.h.
* dicos-tdep.c: Use string.h, not gdb_string.h.
* disasm.c: Use string.h, not gdb_string.h.
* doublest.c: Use string.h, not gdb_string.h.
* dsrec.c: Use string.h, not gdb_string.h.
* dummy-frame.c: Use string.h, not gdb_string.h.
* dwarf2-frame.c: Use string.h, not gdb_string.h.
* dwarf2loc.c: Use string.h, not gdb_string.h.
* dwarf2read.c: Use string.h, not gdb_string.h.
* elfread.c: Use string.h, not gdb_string.h.
* environ.c: Use string.h, not gdb_string.h.
* eval.c: Use string.h, not gdb_string.h.
* event-loop.c: Use string.h, not gdb_string.h.
* exceptions.c: Use string.h, not gdb_string.h.
* exec.c: Use string.h, not gdb_string.h.
* expprint.c: Use string.h, not gdb_string.h.
* f-exp.y: Use string.h, not gdb_string.h.
* f-lang.c: Use string.h, not gdb_string.h.
* f-typeprint.c: Use string.h, not gdb_string.h.
* f-valprint.c: Use string.h, not gdb_string.h.
* fbsd-nat.c: Use string.h, not gdb_string.h.
* findcmd.c: Use string.h, not gdb_string.h.
* findvar.c: Use string.h, not gdb_string.h.
* fork-child.c: Use string.h, not gdb_string.h.
* frame.c: Use string.h, not gdb_string.h.
* frv-linux-tdep.c: Use string.h, not gdb_string.h.
* frv-tdep.c: Use string.h, not gdb_string.h.
* gdb.c: Use string.h, not gdb_string.h.
* gdb_bfd.c: Use string.h, not gdb_string.h.
* gdbarch.c: Use string.h, not gdb_string.h.
* gdbtypes.c: Use string.h, not gdb_string.h.
* gnu-nat.c: Use string.h, not gdb_string.h.
* gnu-v2-abi.c: Use string.h, not gdb_string.h.
* gnu-v3-abi.c: Use string.h, not gdb_string.h.
* go-exp.y: Use string.h, not gdb_string.h.
* go-lang.c: Use string.h, not gdb_string.h.
* go32-nat.c: Use string.h, not gdb_string.h.
* hppa-hpux-tdep.c: Use string.h, not gdb_string.h.
* hppa-linux-nat.c: Use string.h, not gdb_string.h.
* hppanbsd-tdep.c: Use string.h, not gdb_string.h.
* hppaobsd-tdep.c: Use string.h, not gdb_string.h.
* i386-cygwin-tdep.c: Use string.h, not gdb_string.h.
* i386-dicos-tdep.c: Use string.h, not gdb_string.h.
* i386-linux-nat.c: Use string.h, not gdb_string.h.
* i386-linux-tdep.c: Use string.h, not gdb_string.h.
* i386-nto-tdep.c: Use string.h, not gdb_string.h.
* i386-sol2-tdep.c: Use string.h, not gdb_string.h.
* i386-tdep.c: Use string.h, not gdb_string.h.
* i386bsd-tdep.c: Use string.h, not gdb_string.h.
* i386gnu-nat.c: Use string.h, not gdb_string.h.
* i386nbsd-tdep.c: Use string.h, not gdb_string.h.
* i386obsd-tdep.c: Use string.h, not gdb_string.h.
* i387-tdep.c: Use string.h, not gdb_string.h.
* ia64-libunwind-tdep.c: Use string.h, not gdb_string.h.
* ia64-linux-nat.c: Use string.h, not gdb_string.h.
* inf-child.c: Use string.h, not gdb_string.h.
* inf-ptrace.c: Use string.h, not gdb_string.h.
* inf-ttrace.c: Use string.h, not gdb_string.h.
* infcall.c: Use string.h, not gdb_string.h.
* infcmd.c: Use string.h, not gdb_string.h.
* inflow.c: Use string.h, not gdb_string.h.
* infrun.c: Use string.h, not gdb_string.h.
* interps.c: Use string.h, not gdb_string.h.
* iq2000-tdep.c: Use string.h, not gdb_string.h.
* irix5-nat.c: Use string.h, not gdb_string.h.
* jv-exp.y: Use string.h, not gdb_string.h.
* jv-lang.c: Use string.h, not gdb_string.h.
* jv-typeprint.c: Use string.h, not gdb_string.h.
* jv-valprint.c: Use string.h, not gdb_string.h.
* language.c: Use string.h, not gdb_string.h.
* linux-fork.c: Use string.h, not gdb_string.h.
* linux-nat.c: Use string.h, not gdb_string.h.
* lm32-tdep.c: Use string.h, not gdb_string.h.
* m2-exp.y: Use string.h, not gdb_string.h.
* m2-typeprint.c: Use string.h, not gdb_string.h.
* m32c-tdep.c: Use string.h, not gdb_string.h.
* m32r-linux-nat.c: Use string.h, not gdb_string.h.
* m32r-linux-tdep.c: Use string.h, not gdb_string.h.
* m32r-rom.c: Use string.h, not gdb_string.h.
* m32r-tdep.c: Use string.h, not gdb_string.h.
* m68hc11-tdep.c: Use string.h, not gdb_string.h.
* m68k-tdep.c: Use string.h, not gdb_string.h.
* m68kbsd-tdep.c: Use string.h, not gdb_string.h.
* m68klinux-nat.c: Use string.h, not gdb_string.h.
* m68klinux-tdep.c: Use string.h, not gdb_string.h.
* m88k-tdep.c: Use string.h, not gdb_string.h.
* macrocmd.c: Use string.h, not gdb_string.h.
* main.c: Use string.h, not gdb_string.h.
* mdebugread.c: Use string.h, not gdb_string.h.
* mem-break.c: Use string.h, not gdb_string.h.
* memattr.c: Use string.h, not gdb_string.h.
* memory-map.c: Use string.h, not gdb_string.h.
* mep-tdep.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-break.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-disas.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-env.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-stack.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-var.c: Use string.h, not gdb_string.h.
* mi/mi-cmds.c: Use string.h, not gdb_string.h.
* mi/mi-console.c: Use string.h, not gdb_string.h.
* mi/mi-getopt.c: Use string.h, not gdb_string.h.
* mi/mi-interp.c: Use string.h, not gdb_string.h.
* mi/mi-main.c: Use string.h, not gdb_string.h.
* mi/mi-parse.c: Use string.h, not gdb_string.h.
* microblaze-rom.c: Use string.h, not gdb_string.h.
* microblaze-tdep.c: Use string.h, not gdb_string.h.
* mingw-hdep.c: Use string.h, not gdb_string.h.
* minidebug.c: Use string.h, not gdb_string.h.
* minsyms.c: Use string.h, not gdb_string.h.
* mips-irix-tdep.c: Use string.h, not gdb_string.h.
* mips-linux-tdep.c: Use string.h, not gdb_string.h.
* mips-tdep.c: Use string.h, not gdb_string.h.
* mips64obsd-tdep.c: Use string.h, not gdb_string.h.
* mipsnbsd-tdep.c: Use string.h, not gdb_string.h.
* mipsread.c: Use string.h, not gdb_string.h.
* mn10300-linux-tdep.c: Use string.h, not gdb_string.h.
* mn10300-tdep.c: Use string.h, not gdb_string.h.
* monitor.c: Use string.h, not gdb_string.h.
* moxie-tdep.c: Use string.h, not gdb_string.h.
* mt-tdep.c: Use string.h, not gdb_string.h.
* nbsd-tdep.c: Use string.h, not gdb_string.h.
* nios2-linux-tdep.c: Use string.h, not gdb_string.h.
* nto-procfs.c: Use string.h, not gdb_string.h.
* nto-tdep.c: Use string.h, not gdb_string.h.
* objc-lang.c: Use string.h, not gdb_string.h.
* objfiles.c: Use string.h, not gdb_string.h.
* opencl-lang.c: Use string.h, not gdb_string.h.
* osabi.c: Use string.h, not gdb_string.h.
* osdata.c: Use string.h, not gdb_string.h.
* p-exp.y: Use string.h, not gdb_string.h.
* p-lang.c: Use string.h, not gdb_string.h.
* p-typeprint.c: Use string.h, not gdb_string.h.
* parse.c: Use string.h, not gdb_string.h.
* posix-hdep.c: Use string.h, not gdb_string.h.
* ppc-linux-nat.c: Use string.h, not gdb_string.h.
* ppc-sysv-tdep.c: Use string.h, not gdb_string.h.
* ppcfbsd-tdep.c: Use string.h, not gdb_string.h.
* ppcnbsd-tdep.c: Use string.h, not gdb_string.h.
* ppcobsd-tdep.c: Use string.h, not gdb_string.h.
* printcmd.c: Use string.h, not gdb_string.h.
* procfs.c: Use string.h, not gdb_string.h.
* prologue-value.c: Use string.h, not gdb_string.h.
* python/py-auto-load.c: Use string.h, not gdb_string.h.
* python/py-gdb-readline.c: Use string.h, not gdb_string.h.
* ravenscar-thread.c: Use string.h, not gdb_string.h.
* regcache.c: Use string.h, not gdb_string.h.
* registry.c: Use string.h, not gdb_string.h.
* remote-fileio.c: Use string.h, not gdb_string.h.
* remote-m32r-sdi.c: Use string.h, not gdb_string.h.
* remote-mips.c: Use string.h, not gdb_string.h.
* remote-sim.c: Use string.h, not gdb_string.h.
* remote.c: Use string.h, not gdb_string.h.
* reverse.c: Use string.h, not gdb_string.h.
* rs6000-aix-tdep.c: Use string.h, not gdb_string.h.
* ser-base.c: Use string.h, not gdb_string.h.
* ser-go32.c: Use string.h, not gdb_string.h.
* ser-mingw.c: Use string.h, not gdb_string.h.
* ser-pipe.c: Use string.h, not gdb_string.h.
* ser-tcp.c: Use string.h, not gdb_string.h.
* ser-unix.c: Use string.h, not gdb_string.h.
* serial.c: Use string.h, not gdb_string.h.
* sh-tdep.c: Use string.h, not gdb_string.h.
* sh64-tdep.c: Use string.h, not gdb_string.h.
* shnbsd-tdep.c: Use string.h, not gdb_string.h.
* skip.c: Use string.h, not gdb_string.h.
* sol-thread.c: Use string.h, not gdb_string.h.
* solib-dsbt.c: Use string.h, not gdb_string.h.
* solib-frv.c: Use string.h, not gdb_string.h.
* solib-osf.c: Use string.h, not gdb_string.h.
* solib-spu.c: Use string.h, not gdb_string.h.
* solib-target.c: Use string.h, not gdb_string.h.
* solib.c: Use string.h, not gdb_string.h.
* somread.c: Use string.h, not gdb_string.h.
* source.c: Use string.h, not gdb_string.h.
* sparc-nat.c: Use string.h, not gdb_string.h.
* sparc-sol2-tdep.c: Use string.h, not gdb_string.h.
* sparc-tdep.c: Use string.h, not gdb_string.h.
* sparc64-tdep.c: Use string.h, not gdb_string.h.
* sparc64fbsd-tdep.c: Use string.h, not gdb_string.h.
* sparc64nbsd-tdep.c: Use string.h, not gdb_string.h.
* sparcnbsd-tdep.c: Use string.h, not gdb_string.h.
* spu-linux-nat.c: Use string.h, not gdb_string.h.
* spu-multiarch.c: Use string.h, not gdb_string.h.
* spu-tdep.c: Use string.h, not gdb_string.h.
* stabsread.c: Use string.h, not gdb_string.h.
* stack.c: Use string.h, not gdb_string.h.
* std-regs.c: Use string.h, not gdb_string.h.
* symfile.c: Use string.h, not gdb_string.h.
* symmisc.c: Use string.h, not gdb_string.h.
* symtab.c: Use string.h, not gdb_string.h.
* target.c: Use string.h, not gdb_string.h.
* thread.c: Use string.h, not gdb_string.h.
* tilegx-linux-nat.c: Use string.h, not gdb_string.h.
* tilegx-tdep.c: Use string.h, not gdb_string.h.
* top.c: Use string.h, not gdb_string.h.
* tracepoint.c: Use string.h, not gdb_string.h.
* tui/tui-command.c: Use string.h, not gdb_string.h.
* tui/tui-data.c: Use string.h, not gdb_string.h.
* tui/tui-disasm.c: Use string.h, not gdb_string.h.
* tui/tui-file.c: Use string.h, not gdb_string.h.
* tui/tui-layout.c: Use string.h, not gdb_string.h.
* tui/tui-out.c: Use string.h, not gdb_string.h.
* tui/tui-regs.c: Use string.h, not gdb_string.h.
* tui/tui-source.c: Use string.h, not gdb_string.h.
* tui/tui-stack.c: Use string.h, not gdb_string.h.
* tui/tui-win.c: Use string.h, not gdb_string.h.
* tui/tui-windata.c: Use string.h, not gdb_string.h.
* tui/tui-winsource.c: Use string.h, not gdb_string.h.
* typeprint.c: Use string.h, not gdb_string.h.
* ui-file.c: Use string.h, not gdb_string.h.
* ui-out.c: Use string.h, not gdb_string.h.
* user-regs.c: Use string.h, not gdb_string.h.
* utils.c: Use string.h, not gdb_string.h.
* v850-tdep.c: Use string.h, not gdb_string.h.
* valarith.c: Use string.h, not gdb_string.h.
* valops.c: Use string.h, not gdb_string.h.
* valprint.c: Use string.h, not gdb_string.h.
* value.c: Use string.h, not gdb_string.h.
* varobj.c: Use string.h, not gdb_string.h.
* vax-tdep.c: Use string.h, not gdb_string.h.
* vaxnbsd-tdep.c: Use string.h, not gdb_string.h.
* vaxobsd-tdep.c: Use string.h, not gdb_string.h.
* windows-nat.c: Use string.h, not gdb_string.h.
* xcoffread.c: Use string.h, not gdb_string.h.
* xml-support.c: Use string.h, not gdb_string.h.
* xstormy16-tdep.c: Use string.h, not gdb_string.h.
* xtensa-linux-nat.c: Use string.h, not gdb_string.h.
This imports the gnulib strstr and strerror modules. It doesn't make
any other changes to gdb; I found it simpler to work with the branch
if I made the changes more indepdendent than I had previously.
2013-11-18 Tom Tromey <tromey@redhat.com>
* gnulib/update-gnulib.sh (IMPORTED_GNULIB_MODULES): Add strerror
and strstr.
* gnulib/aclocal.m4: Update.
* gnulib/config.in: Update.
* gnulib/configure: Update.
* gnulib/import/Makefile.am: Update.
* gnulib/import/Makefile.in: Update.
* gnulib/import/errno.in.h: New.
* gnulib/import/intprops.h: New.
* gnulib/import/m4/errno_h.m4: New.
* gnulib/import/m4/gnulib-cache.m4: Update.
* gnulib/import/m4/gnulib-comp.m4: Update.
* gnulib/import/m4/strerror.m4: New.
* gnulib/import/m4/strstr.m4: New.
* gnulib/import/m4/sys_socket_h.m4: New.
* gnulib/import/strerror-override.c: New.
* gnulib/import/strerror-override.h: New.
* gnulib/import/strerror.c: New.
* gnulib/import/strstr.c: New.
While adding modules I found that the current approach of listing all
the modules on one line made it harder to experiment -- any conflicts
from git were a pain to resolve.
This patch splits the list of modules so that there is one module per
line.
2013-11-18 Tom Tromey <tromey@redhat.com>
* gnulib/update-gnulib.sh (IMPORTED_GNULIB_MODULES): Split into
multiple lines.
2013-11-18 Jose E. Marchesi <jose.marchesi@oracle.com>
* sparc-tdep.c (sparc_is_annulled_branch_insn): New function.
* sparc-tdep.h: And its prototype.
* sparc64-linux-tdep.c (sparc64_linux_get_longjmp_target): New
function.
(sparc64_linux_init_abi): Register the get_longjmp_target hook.
Since 'struct dwarf_expr_context_funcs::read_addr_from_reg' is now
only used for addresses, we can make it use unpack_pointer. And since
we now have 'struct dwarf_expr_context_funcs'::get_reg_value, there's
no need for speculation about using values here.
Tested on x86_64 Fedora 17.
gdb/
2013-11-18 Pedro Alves <palves@redhat.com>
* dwarf2-frame.c (read_addr_from_reg): Remove stale comment and
use unpack_pointer.
Following the addition of the --language optiton to all GDB/MI
commands, I realized that there was no easy way for front-ends
to figure out whether this features is available or not. So I added
a "language-option" entry to -list-features.
gdb/ChangeLog:
* mi/mi-main.c (mi_cmd_list_features): Add "language-options"
to -list-features output.
gdb/doc/ChangeLog:
* gdb.texinfo (GDB/MI Miscellaneous Commands): Document the new
"language-option" entry in the output of the "-list-features"
command.
This is to help make it slightly clearer how this method is expected
to extract data from the given register.
gdb/ChangeLog:
* dwarf2expr.h (struct dwarf_expr_context_funcs)
<read_addr_from_reg>: Renames "read_reg".
* dwarf2-frame.c (read_addr_from_reg): Renames "read_reg".
Adjust comment.
(dwarf2_frame_ctx_funcs, execute_stack_op, dwarf2_frame_cache):
Use read_addr_from_reg in place of read_reg.
* dwarf2expr.c (execute_stack_op): Use read_addr_from_reg
in place of read_reg.
* dwarf2loc.c (dwarf_expr_read_addr_from_reg): Renames
dwarf_expr_read_reg.
(dwarf_expr_ctx_funcs): Replace dwarf_expr_read_reg
with dwarf_expr_read_addr_from_reg.
(needs_frame_read_addr_from_reg): Renames needs_frame_read_reg.
(needs_frame_ctx_funcs): Replace needs_frame_read_reg with
needs_frame_read_addr_from_reg.
Similar to qsort(), the glibc version of memcpy() also declares its
arguments with __attribute__(__nonnull__(...)). If NULL is passed
anyway, upstream GCC's new pass '-fisolate-erroneous-paths' typically
causes a trap in such cases. I've encountered this with GDB in
chain_candidate() when trying to execute the break.exp test case.
gdb/
2013-11-13 Andreas Arnez <arnez@linux.vnet.ibm.com>
* dwarf2loc.c (chain_candidate): Prevent invoking memcpy with
NULL.
This patch fixes PR c++/16117.
gdb has an extension so that users can use expressions like FILE::NAME
to choose a variable of the given name from the given file. The bug
is that this extension takes precedence over ordinary C++ expressions
of the same form. You might think this is merely hypothetical, but
now that C++ headers commonly do not use an extension, it is more
common.
This patch fixes the bug by making two related changes. First, it
changes gdb to prefer the ordinary C++ meaning of a symbol over the
extended meaning. Second, it arranges for single-quoting of the
symbol to indicate a preference for the extension.
Built and regtested on x86-64 Fedora 18.
New test case included.
2013-11-15 Tom Tromey <tromey@redhat.com>
PR c++/16117:
* c-exp.y (lex_one_token): Add "is_quoted_name" argument.
(classify_name): Likewise. Prefer a field of "this" over a
filename.
(classify_inner_name, yylex): Update.
2013-11-15 Tom Tromey <tromey@redhat.com>
* gdb.texinfo (Variables): Note gdb rules for ambiguous cases.
Add example.
2013-11-15 Tom Tromey <tromey@redhat.com>
* gdb.cp/includefile: New file.
* gdb.cp/filename.exp: New file.
* gdb.cp/filename.cc: New file.
Consider the following code, compiled at -O2 on ppc-linux:
procedure Increment (Val : in out Float; Msg : String);
The implementation does not really matter in this case). In our example,
this function is being called from a function with Param_1 set to 99.0.
Trying to break inside that function, and running until reaching that
breakpoint yields:
(gdb) b increment
Breakpoint 1 at 0x100014b4: file callee.adb, line 6.
(gdb) run
Starting program: /[...]/foo
Breakpoint 1, callee.increment (val=99.0, val@entry=0.0, msg=...)
at callee.adb:6
6 if Val > 200.0 then
The @entry value for parameter "val" is incorrect, it should be 99.0.
The associated call-site parameter DIE looks like this:
.uleb128 0xc # (DIE (0x115) DW_TAG_GNU_call_site_parameter)
.byte 0x2 # DW_AT_location
.byte 0x90 # DW_OP_regx
.uleb128 0x21
.byte 0x3 # DW_AT_GNU_call_site_value
.byte 0xf5 # DW_OP_GNU_regval_type
.uleb128 0x3f
.uleb128 0x25
The DW_AT_GNU_call_site_value uses a DW_OP_GNU_regval_type
operation, referencing register 0x3f=63, which is $f31,
an 8-byte floating register. In that register, the value is
stored using the usual 8-byte float format:
(gdb) info float
f31 99.0 (raw 0x4058c00000000000)
The current code evaluating DW_OP_GNU_regval_type operations
currently is (dwarf2expr.c:execute_stack_op):
result = (ctx->funcs->read_reg) (ctx->baton, reg);
result_val = value_from_ulongest (address_type, result);
result_val = value_from_contents (type,
value_contents_all (result_val));
What the ctx->funcs->read_reg function does is read the contents
of the register as if it contained an address. The rest of the code
continues that assumption, thinking it's OK to then use that to
create an address/ulongest struct value, which we then re-type
to the type specified by DW_OP_GNU_regval_type.
We're getting 0.0 above because the read_reg implementations
end up treating the contents of the FP register as an integral,
reading only 4 out of the 8 bytes. Being a big-endian target,
we read the high-order ones, which gives us zero.
This patch fixes the problem by introducing a new callback to
read the contents of a register as a given type, and then adjust
the handling of DW_OP_GNU_regval_type to use that new callback.
gdb/ChangeLog:
* dwarf2expr.h (struct dwarf_expr_context_funcs) <read_reg>:
Extend the documentation a bit.
<get_reg_value>: New field.
* dwarf2loc.c (dwarf_expr_get_reg_value)
(needs_frame_get_reg_value): New functions.
(dwarf_expr_ctx_funcs, needs_frame_ctx_funcs): Add "get_reg_value"
callback.
* dwarf2-frame.c (get_reg_value): New function.
(dwarf2_frame_ctx_funcs): Add "get_reg_value" callback.
* dwarf2expr.c (execute_stack_op) <DW_OP_GNU_regval_type>:
Use new callback to compute result_val.
gdb/testsuite/ChangeLog:
* gdb.ada/O2_float_param: New testcase.
ELFv2 needs different plt call stubs to ELFv1, register usage differs
too. When I added these to ld I changed register usage in the ELFv1
stubs as well, simplifying the linker code and (perhaps) future
maintenance. All well and good, but this means gdb needs to cope with
more stub variants. This patch also handles skipping over addis/addi
setting up r2 in ELFv2 global entry code. We want breakpoints to be
set past this point to catch calls via the local entry point.
* ppc64-tdep.c (ppc64_plt_entry_point): Renamed from..
(ppc64_desc_entry_point): ..this. Update comments here and at
call points.
(ppc64_standard_linkage1, ppc64_standard_linkage2,
ppc64_standard_linkage3): Update comments.
(ppc64_standard_linkage4, ppc64_standard_linkage5,
(ppc64_standard_linkage6, ppc64_standard_linkage7): New insn
patterns.
(ppc64_standard_linkage4_target): New function.
(ppc64_skip_trampoline_code): Skip ELFv2 patterns too.
* rs6000-tdep.c (skip_prologue): Skip ELFv2 r2 setup. Correct
nop match. Fix comment wrap.
Before all this stop_soon handling, we have code that can end in
keep_going. Particularly, the thread_hop_needed code looked
suspicious considering breakpoint always-inserted mode, though on
closer inspection, it'd take connecting to multiple remote targets
that shared the same address space to trigger that.
Still, I think it's clearer if all this remote connection setup /
attach code is placed early, before any keep_going path could be
reached.
gdb/
2013-11-14 Pedro Alves <palves@redhat.com>
* infrun.c (handle_signal_stop): Move STOP_QUIETLY,
STOP_QUIETLY_REMOTE and 'stop_after_trap' handling earlier.
After the previous patches, we only ever reach the code after the
initial 'switch (ecs->ws.kind)' switch for TARGET_WAITKIND_STOPPED.
We can now factor out all that to its own function.
Unfortunately, stepped_after_stopped_by_watchpoint needed to move to
the ecs. I think that indicates a state machine bug -- no event other
than TARGET_WAITKIND_STOPPED indicates a single-step actually
finished. TARGET_WAITKIND_SYSCALL_XXX, TARGET_WAITKIND_FORK, etc. are
all events that are triggered from the kernel, _within_ a syscall,
IOW, from userspace's perspective, halfway through an instruction
being executed. This might actually matter for the syscall events, as
syscalls can change memory (and thus trigger watchpoints).
gdb/
2013-11-14 Pedro Alves <palves@redhat.com>
* infrun.c (struct execution_control_state)
<stepped_after_stopped_by_watchpoint>: New field.
(get_inferior_stop_soon): New function.
(handle_inferior_event): 'stepped_after_stopped_by_watchpoint' was
moved to struct execution_control_state -- adjust. Use
get_inferior_stop_soon. Split TARGET_WAITKIND_STOPPED handling to
new function.
(handle_signal_stop): New function, factored out from
handle_inferior_event.
After the previous patch, there's actually no breakpoint type that
returns BPSTAT_SIGNAL_HIDE, so we can go back to having
bpstat_explains_signal return a boolean. The signal hiding actually
disappears.
gdb/
2013-11-14 Pedro Alves <palves@redhat.com>
* break-catch-sig.c (signal_catchpoint_explains_signal): Adjust to
return a boolean.
* breakpoint.c (bpstat_explains_signal): Adjust to return a
boolean.
(explains_signal_watchpoint, base_breakpoint_explains_signal):
Adjust to return a boolean.
* breakpoint.h (enum bpstat_signal_value): Delete.
(struct breakpoint_ops) <explains_signal>: New returns a boolean.
(bpstat_explains_signal): Likewise.
* infrun.c (handle_inferior_event) <random signal checks>:
bpstat_explains_signal now returns a boolean - adjust. No longer
consider hiding signals.
Looking at the current random signal checks:
if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP)
random_signal
= !((bpstat_explains_signal (ecs->event_thread->control.stop_bpstat,
GDB_SIGNAL_TRAP)
!= BPSTAT_SIGNAL_NO)
|| stopped_by_watchpoint
|| ecs->event_thread->control.trap_expected
|| (ecs->event_thread->control.step_range_end
&& (ecs->event_thread->control.step_resume_breakpoint
== NULL)));
else
{
enum bpstat_signal_value sval;
sval = bpstat_explains_signal (ecs->event_thread->control.stop_bpstat,
ecs->event_thread->suspend.stop_signal);
random_signal = (sval == BPSTAT_SIGNAL_NO);
if (sval == BPSTAT_SIGNAL_HIDE)
ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_0;
}
We can observe:
- the stepping checks bit:
...
|| ecs->event_thread->control.trap_expected
|| (ecs->event_thread->control.step_range_end
&& (ecs->event_thread->control.step_resume_breakpoint
== NULL)));
...
is just like currently_stepping:
static int
currently_stepping (struct thread_info *tp)
{
return ((tp->control.step_range_end
&& tp->control.step_resume_breakpoint == NULL)
|| tp->control.trap_expected
|| bpstat_should_step ());
}
except it misses the bpstat_should_step check (***).
It's not really necessary to check bpstat_should_step in the
random signal tests, because software watchpoints always end up in
the bpstat list anyway, which means bpstat_explains_signal with
GDB_SIGNAL_TRAP always returns at least BPSSTAT_SIGNAL_HIDE, but I
think the code is clearer if we reuse currently_stepping.
*** - bpstat_should_step checks to see if there's any software
watchpoint in the breakpoint list, because we need to force the
target to single-step all the way, to evaluate the watchpoint's
value at each step.
- we never hide GDB_SIGNAL_TRAP, even if the bpstat returns
BPSTAT_SIGNAL_HIDE, which is actually the default for all
breakpoints. If we make the default be BPSTAT_SIGNAL_PASS, then
we can merge the two bpstat_explains_signal paths.
gdb/
2013-11-14 Pedro Alves <palves@redhat.com>
* breakpoint.c (bpstat_explains_signal) <Moribund locations>:
Return BPSTAT_SIGNAL_PASS instead of BPSTAT_SIGNAL_HIDE.
(explains_signal_watchpoint): Return BPSTAT_SIGNAL_PASS instead of
BPSTAT_SIGNAL_HIDE.
(base_breakpoint_explains_signal): Return BPSTAT_SIGNAL_PASS
instead of BPSTAT_SIGNAL_HIDE.
* infrun.c (handle_inferior_event): Rework random signal checks.
This goes a step forward in making only TARGET_WAITKIND_STOPPED talk
about signals.
There's no reason for the "catchpoint" TARGET_WAITKIND_XXXs to consult
bpstat about signals -- unlike breakpoints, all these events are
continuable, so we don't need to do a remove-break/step/reinsert-break
-like dance. That means we don't actually need to run them through
process_event_stop_test (for the bpstat_what checks), and can just use
bpstat_causes_stop instead. Note we were already using it in the
TARGET_WAITKIND_(V)FORKED cases.
Then, these "catchpoint" waitkinds don't need to set
ecs->random_signal for anything, because they check it immediately
afterwards (and the value they set is never used again).
gdb/
2013-11-14 Pedro Alves <palves@redhat.com>
* infrun.c (struct execution_control_state): Remove
'random_signal' field.
(handle_syscall_event): Use bpstat_causes_stop instead of
bpstat_explains_signal. Don't set ecs->random_signal.
(handle_inferior_event): New 'random_signal' local.
<TARGET_WAITKIND_FORKED, TARGET_WAITKIND_VFORKED,
TARGET_WAITKIND_EXECD>: Use bpstat_causes_stop instead of
bpstat_explains_signal. Don't set ecs->random_signal.
<TARGET_WAITKIND_STOPPED>: Adjust to use local instead of
ecs->random_signal.
This comment applies to the whole handle_inferior_event flow, top to
bottom. Best move it to the function's intro.
gdb/
2013-11-14 Pedro Alves <palves@redhat.com>
* infrun.c (handle_inferior_event): Move comment from the
function's body to the function's description, adjusted.
Of all the TARGET_WAITKIND_XXXs event kinds other than
TARGET_WAITKIND_STOPPED, TARGET_WAITKIND_LOADED is the only kind that
doesn't end in a return, instead falling through to all the
signal/breakpoint/stepping handling code. But it only falls through
in the STOP_QUIETLY_NO_SIGSTOP and STOP_QUIETLY_REMOTE cases, which
means the
/* This is originated from start_remote(), start_inferior() and
shared libraries hook functions. */
if (stop_soon == STOP_QUIETLY || stop_soon == STOP_QUIETLY_REMOTE)
{
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: quietly stopped\n");
stop_stepping (ecs);
return;
}
bit is eventually reached. All tests before that is reached will
always fail. It's simpler to inline the stop_soon checks close to the
TARGET_WAITKIND_LOADED code, which allows removing the fall through.
Tested on x86_64 Fedora 17, but that doesn't exercise this
TARGET_WAITKIND_LOADED.
Also ran gdb.base/solib-disc.exp on Cygwin/gdbserver, which exercises
reconnection while the inferior is stopped at an solib event, but then
again, gdbserver always replies a regular trap on initial connection,
instead of the last event the program had seen:
Sending packet: $?#3f...Packet received: T0505:4ca72800;04:f8a62800;08:62fcc877;thread:d28;
Sending packet: $Hc-1#09...Packet received: E01
Sending packet: $qAttached#8f...Packet received: 0
Packet qAttached (query-attached) is supported
infrun: clear_proceed_status_thread (Thread 3368)
Sending packet: $qOffsets#4b...Packet received:
infrun: wait_for_inferior ()
infrun: target_wait (-1, status) =
infrun: 42000 [Thread 3368],
infrun: status->kind = stopped, signal = GDB_SIGNAL_TRAP
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc = 0x77c8fc62
infrun: quietly stopped
infrun: stop_stepping
So the only way to exercise this would be to hack gdbserver. I didn't
go that far though. I'm reasonably confident this is correct.
gdb/
2013-11-14 Pedro Alves <palves@redhat.com>
* infrun.c (handle_inferior_event) <TARGET_WAITKIND_LOADED>:
Handle STOP_QUIETLY_NO_SIGSTOP and STOP_QUIETLY_REMOTE here.
Assert we never fall through out of the TARGET_WAITKIND_LOADED
case.
While digging into a different memory corruption error, I happened to
notice one coming from the linetable code. In a couple of spots, the
wrong termination condition was used in a loop, leading gdb to read
one element past the end of the linetable.
Built and regtested on x86-64 Fedora 18. Also verified using
valgrind. I'm checking this in.
2013-11-14 Tom Tromey <tromey@redhat.com>
* python/py-linetable.c (ltpy_has_line)
(ltpy_get_all_source_lines): Fix loop termination condition.
Frontend sometimes need to evaluate expressions that are
language-specific. For instance, Eclipse uses the following
expression to determine the size of an address on the target:
-data-evaluate-expression "sizeof (void*)"
Unfortunately, if the main of the program being debugged is not C,
this may not work. For instance, if the main is in Ada, you get...
-data-evaluate-expression "sizeof (void*)"
^error,msg="No definition of \"sizeof\" in current context."
... and apparently decides to stop the debugging session as a result.
The recommendation sent was to specifically set the language to C
before trying to evaluate the expression. Something such as:
1. save current language
2. set language c
3. -data-evaluate-expression "sizeof (void*)"
4. Restore language
This has the same disadvantages as the ones outlined in the "Context
Management" section of the GDB/MI documentation regarding setting
the current thread or the current frame, thus recommending the use of
general command-line switches such as --frame, or --thread instead.
This patch follows the same steps for the language, adding a similar
new command option: --language LANG. Example of use:
-data-evaluate-expression --language c "sizeof (void*)"
^done,value="4"
gdb/ChangeLog:
* mi/mi-parse.h (struct mi_parse) <language>: New field.
* mi/mi-main.c (mi_cmd_execute): Temporarily set language to
PARSE->LANGUAGE during command execution, if set.
* mi/mi-parse.c: Add "language.h" #include.
(mi_parse): Add parsing of "--language" command option.
* NEWS: Add entry mentioning the new "--language" command option.
gdb/testsuite/ChangeLog:
* gdb.mi/mi-language.exp: New file.
gdb/doc/ChangeLog:
* gdb.texinfo (Show): Add xref anchor for "show language" command.
(Context management): Place current subsection text into its own
subsubsection. Add new subsubsection describing the "--language"
command option.
This function provides the exact same functionality as extract_arg,
except that it takes a "const char**" instead of a "char **".
It allows us also to re-implement extract_arg almost as a simple
wrapper around the new function.
gdb/ChangeLog:
Pedro Alves <palves@redhat.com>
Joel Brobecker <brobecker@adacore.com>
* cli/cli-utils.h (extract_arg_const): Add declaration.
* cli/cli-utils.c (extract_arg_const): New function.
(extract_arg): Reimplement using extract_arg_const.
In addition to the fact that language.h depends on a number of struct
types declared in symtab.h, language.h also depends on an enumerated
type (domain_enum). So language.h should #include "symtab.h".
gdb/ChangeLog:
* language.h: Add "symtab.h" #include.
Rather than having -list-features report support for the GDB/MI
commands providing access to Ada exception catchpoints with one entry,
and the GDB/MI command providing the list of Ada exceptions with
a second entry, this patch merges it all within one single entry.
This is OK, because all these commands were added within a short
amount of time, and within the same release cycle; and it reduces
a bit the size of the output.
gdb/ChangeLog:
* mi/mi-main.c (mi_cmd_list_features): Replace "info-ada-exceptions"
entry with "ada-exceptions".
gdb/doc/ChangeLog:
* gdb.texinfo (GDB/MI Miscellaneous Commands): Delete
the documentation of "info-ada-exceptions" in the output
of the "-list-features" command. Add the documentation
of the "ada-exception" entry instead.
This patch aims at fixing the following problem, where the user:
. debugs its program
. makes a modification and rebuilds it *without exiting the debugger*
. returns to its debugging session and restarts the inferior
In that situation, the debugger notices that the underlying executable
has changed and that re-reading its symbols is needed. Shortly after
displaying a message informing the user of the situation, GDB crashes:
(gdb) run
[...]
`/[...]/dest' has changed; re-reading symbols.
zsh: 13434922 segmentation fault (core dumped)
The crash occurs while trying to allocate some memory on the bfd_bfd
obstack. But, at some point in time, the whole obstack data gets
corrupted, nullified. So the memory allocation fails trying to call
a function at a NULL address. (side note: when debugging GDB in GDB,
top-gdb reports a SIGILL, while the shell makes it look like it was
a SIGSEGV - the discrepancy is not critical to the investigation
and therefore was not explored)
The corruption occurred because the region where the per_bfd data
got free'ed nearly after it got allocated! This is what happens,
in chronological order (see reread_symbols):
1. GDB notices that the executable has changed, decides to
re-read its symbols.
2. Opens a new bfd, unrefs the old one
3. Calls set_objfile_per_bfd (objfile);
4. Re-initializes the objfile's obstack:
obstack_init (&objfile->objfile_obstack);
I think that the normal behavior for set_objfile_per_bfd would
be to search for already-allocated shared per_bfd data, and
allocate new one if not found. The critical difference between
a platform such as x86_64-linuxe where it works, and ppc-aix,
where it doesn't lies in the fact that bfd-data sharing is not
activated on ppc-aix, and as a result, the per-bfd data gets
allocated on the objfile's obstack instead of in the bfd objalloc:
/* If the object requires gdb to do relocations, we simply fall
back to not sharing data across users. These cases are rare
enough that this seems reasonable. */
if (abfd != NULL && !gdb_bfd_requires_relocations (abfd))
{
storage = bfd_zalloc (abfd, sizeof (struct objfile_per_bfd_storage));
set_bfd_data (abfd, objfiles_bfd_data, storage);
}
else
storage = OBSTACK_ZALLOC (&objfile->objfile_obstack,
struct objfile_per_bfd_storage);
Allocating that per_bfd storage is of course nearly useless since
we end up free-ing right after in step (4) above. Eventually,
the memory region ends up being re-used, hence the corruption
leading to the crash.
This fix was simply to move the call to set_objfile_per_bfd after
the objfile's obstack re-initialization.
gdb/ChangeLog:
* symfile.c (reread_symbols): Move call to set_objfile_per_bfd
after re-initialization of OBJFILE's obstack.
Upstream GCC's new pass '-fisolate-erroneous-paths' may introduce
traps at places where GCC has determined undefined behavior, e.g. when
passing a NULL pointer to a function that defines this argument as
__attribute__(__nonnull__(...)). In particular this applies to
uniquify_strings(), because it invokes qsort() with NULL when the
'strings' vector is empty. I hit this problem on s390x when trying to
execute "break main" on a C program.
gdb/
2013-11-12 Andreas Arnez <arnez@linux.vnet.ibm.com>
* objc-lang.c (uniquify_strings): Prevent invoking qsort with
NULL.
* dwarf2read.c (read_index_from_section): Update comment.
(struct dw2_symtab_iterator): New member global_seen.
(dw2_symtab_iter_init): Initialize it.
(dw2_symtab_iter_next): Skip duplicate global symbols.
(dw2_expand_symtabs_matching): Ditto.
This patch adds a new command "info exceptions" whose purpose is to
provide the list of exceptions currently defined in the inferior.
The usage is:
(gdb) info exceptions [REGEXP]
Without argument, the command lists all exceptions. Otherwise,
only those whose name match REGEXP are listed.
For instance:
(gdb) info exceptions
All defined Ada exceptions:
constraint_error: 0x613dc0
program_error: 0x613d40
storage_error: 0x613d00
tasking_error: 0x613cc0
global_exceptions.a_global_exception: 0x613a80
global_exceptions.a_private_exception: 0x613ac0
The name of the command, as well as its output is part of a legacy
I inherited long ago. It's output being parsed by frontends such as
GPS, I cannot easily change it. Same for the command name.
The implementation is mostly self-contained, and is written in a way
that should make it easy to implement the GDB/MI equivalent. The
careful reviewer will notice that the code added in ada-lang.h could
normally be made private inside ada-lang.c. But these will be used
by the GDB/MI implementation. Rather than making those private now,
only to move them later, I've made them public right away.
gdb/ChangeLog:
* ada-lang.h: #include "vec.h".
(struct ada_exc_info): New.
(ada_exc_info): New typedef.
(DEF_VEC_O(ada_exc_info)): New vector.
(ada_exceptions_list): Add declaration.
* ada-lang.c (ada_is_exception_sym)
(ada_is_non_standard_exception_sym, compare_ada_exception_info)
(sort_remove_dups_ada_exceptions_list)
(ada_exc_search_name_matches, ada_add_standard_exceptions)
(ada_add_exceptions_from_frame, ada_add_global_exceptions)
(ada_exceptions_list_1, ada_exceptions_list)
(info_exceptions_command): New function.
(_initialize_ada_language): Add "info exception" command.
gdb/testsuite/ChangeLog:
* gdb.ada/info_exc: New testcase.
When using the GDB/MI commands to insert a catchpoint on a specific
Ada exception, any re-evaluation of that catchpoint (for instance
a re-evaluation performed after a shared library got mapped by the
inferior) fails. For instance, with any Ada program:
(gdb)
-catch-exception -e program_error
^done,bkptno="1",bkpt={[...]}
(gdb)
-exec-run
=thread-group-started,id="i1",pid="28315"
=thread-created,id="1",group-id="i1"
^running
*running,thread-id="all"
(gdb)
=library-loaded,[...]
&"warning: failed to reevaluate internal exception condition for catchpoint 1: No definition of \"exec\" in current context.\n"
&"warning: failed to reevaluate internal exception condition for catchpoint 1: No definition of \"exec\" in current context.\n"
[...]
The same is true if using an Ada exception catchpoint.
The problem comes from the fact that that we deallocate the strings
given as arguments to create_ada_exception_catchpoint, while the latter
just makes shallow copies of those strings, thus creating dandling
pointers.
This patch fixes the issue by passing freshly allocated strings to
create_ada_exception_catchpoint, while at the same time updating
create_ada_exception_catchpoint's documentation to make it clear
that deallocating the strings is no longer the responsibility of
the caller.
gdb/ChangeLog:
* ada-lang.c (create_ada_exception_catchpoint): Enhance
the documentation of fields "except_string" and "condition".
* mi/mi-cmd-catch.c (mi_cmd_catch_assert): Reallocate
CONDITION on the heap before passing it to
create_ada_exception_catchpoint.
(mi_cmd_catch_exception): Likewise for EXCEPTION_NAME and
CONDITION.
gdb/testsuite/ChangeLog:
* gdb.ada/mi_ex_cond: New testcase.
Tested on x86_64-linux. The "-break-list" test FAILs without
this patch.
An earlier patch removed the check for "syscall" since the results
were not used in the C code. However, the result was used, via the
cache variable, elsewhere in configure.
This patch fixes the problem by checking for "syscall" at the point at
which HAVE_TKILL_SYSCALL is defined.
2013-11-11 Tom Tromey <tromey@redhat.com>
* config.in, configure: Rebuild.
* configure.ac (HAVE_TKILL_SYSCALL): Check for "syscall".
* dwarf2read.c (dwarf2_read_debug): Change to unsigned int.
(create_debug_types_hash_table): Only print debugging messages for
each TU if dwarf2-read >= 2.
(process_queue): Ditto.
(_initialize_dwarf2_read): Make "set debug dwarf2-read" a zuinteger.
Update doc string.
doc/
* gdb.texinfo (Debugging Output): Update text for
"set debug dwarf2-read".
My grepping around showed that HAVE_MULTIPLE_PROC_FDS is only ever
mentioned in a comment in configure.ac. Since the macro is long dead,
let's remove the last mention.
2013-11-08 Tom Tromey <tromey@redhat.com>
* configure: Rebuild.
* configure.ac: Remove mentions of HAVE_MULTIPLE_PROC_FDS.
Now that the configury needed for the "common" and "target"
directories is in common.m4, some code in gdb's configure.ac is
redundant.
I ran this script after making an "ID" file using mkid:
sed -n 's/^.*\(HAVE_[A-Z0-9_]*\).*$/\1/p' config.in |
while read x; do
echo ===== $x
gid $x | egrep -v '^(testsuite|gnulib|common|target|gdbserver)/'
done
This finds all the spots using HAVE_ defines, and, more importantly,
makes it clear which defines aren't used in the main parts of gdb.
From this I came up with this patch to remove all the unused bits.
There are a few that are subtly used -- for example the configure
script sometimes checks internal configure cache variables, meaning
some checks cannot be removed.
2013-11-08 Tom Tromey <tromey@redhat.com>
* configure, config.in: Rebuild.
* configure.ac: Remove unused configury.
m32c-tdep.c is the last user of HAVE_STRING_H in gdb proper. It
really ought to be using gdb_string.h instead, as the rest of gdb
does.
2013-11-08 Tom Tromey <tromey@redhat.com>
* m32c-tdep.c: Use gdb_string.h.
The removal of solib-sunos.c also removed the last user of various
macros defined by configure.
This patch removes the corresponding configure code.
2013-11-08 Tom Tromey <tromey@redhat.com>
* configure, config.in: Rebuild.
* configure.ac: Remove all link.h-related checks.
It has bothered me for a while that files in common/ use macros
defined via autoconf checks, but rely on each configure.ac doing the
proper checks independently.
This patch introduces common/common.m4 which consolidates the checks
assumed by code in common.
The rule I propose is that if something is needed or used by common,
it should be checked for by common.m4. However, if the check is also
needed by gdb or gdbserver, then it should be duplicated there.
Built and regtested on x86-64 Fedora 18 (though this is hardly the
most strenuous case) and using the Fedora 18 mingw cross compilers. I
also examined the config.in diffs to ensure that symbols did not go
missing.
2013-11-08 Tom Tromey <tromey@redhat.com>
* acinclude.m4: Include common.m4.
* common/common.m4: New file.
* configure, config.in: Rebuild.
* configure.ac: Use GDB_AC_COMMON.
2013-11-08 Tom Tromey <tromey@redhat.com>
* acinclude.m4: Include common.m4, codeset.m4.
* configure, config.in: Rebuild.
* configure.ac: Use GDB_AC_COMMON.
This patch constifies the target_ops method to_detach.
This is a small cleanup, but also, I think, a bug-prevention fix,
since gdb already acts as if the "args" argument here was const.
In particular, top.c:quit_force calls kill_or_detach via
iterate_over_inferiors. kill_or_detach calls target_detach, passing
the same argument each time. So, if one of these methods was not
const-correct, then kill_or_detach would change its behavior in a
strange way.
I could not build every target I modified in this patch. I've
inspected them all by hand, though. Many targets do not use the
"args" parameter; a couple pass it to atoi; and a few pass it on to
the to_detach method of the target beneath. The only code that
required a real change was in linux-nat.c, and that only needed the
introduction of a temporary variable for const-correctness.
2013-11-08 Tom Tromey <tromey@redhat.com>
* aix-thread.c (aix_thread_detach): Update.
* corelow.c (core_detach): Update.
* darwin-nat.c (darwin_detach): Update.
* dec-thread.c (dec_thread_detach): Update.
* gnu-nat.c (gnu_detach): Update.
* go32-nat.c (go32_detach): Update.
* inf-ptrace.c (inf_ptrace_detach): Update.
* inf-ttrace.c (inf_ttrace_detach): Update.
* linux-fork.c (linux_fork_detach): Update.
* linux-fork.h (linux_fork_detach): Update.
* linux-nat.c (linux_nat_detach): Update. Introduce "tem"
local for const-correctness.
* linux-thread-db.c (thread_db_detach): Update.
* monitor.c (monitor_detach): Update.
* nto-procfs.c (procfs_detach): Update.
* procfs.c (procfs_detach): Update.
* record.c (record_detach): Update.
* record.h (record_detach): Update.
* remote-m32r-sdi.c (m32r_detach): Update.
* remote-mips.c (mips_detach): Update.
* remote-sim.c (gdbsim_detach): Update.
* remote.c (remote_detach_1, remote_detach)
(extended_remote_detach): Update.
* sol-thread.c (sol_thread_detach): Update.
* target.c (target_detach): Make "args" const.
(init_dummy_target): Update.
* target.h (struct target_ops) <to_detach>: Make argument const.
(target_detach): Likewise.
* windows-nat.c (windows_detach): Update.
* python/py-breakpoint.c (bppy_get_temporary): New function.
(bppy_init): New keyword: temporary. Parse it and set breakpoint
to temporary if True.
2013-11-07 Phil Muldoon <pmuldoon@redhat.com>
* gdb.python/py-breakpoint.exp: Add temporary breakpoint tests.
2013-11-07 Phil Muldoon <pmuldoon@redhat.com>
* gdb.texinfo (Breakpoints In Python): Document temporary
option in breakpoint constructor, and add documentation to the
temporary attribute.
This patch does some cleanups, removing some language-related stuff.
Note that mi_cmd_var_info_expression uses varobj_language_string,
which is redundant, because we can get language name from
lang->la_natural_name.
varobj_language_string doesn't have "Ada", which looks like a bug to
me. With this patch applied, this problem doesn't exist, because the
language name is got from the same place (field la_natural_name).
gdb:
2013-11-07 Yao Qi <yao@codesourcery.com>
* mi/mi-cmd-var.c: Include "language.h".
(mi_cmd_var_info_expression): Get language name from
language_defn.
* varobj.c (varobj_language_string): Remove.
(variable_language): Remove declaration.
(languages): Remove.
(varobj_get_language): Change the type of return value.
(variable_language): Remove.
* varobj.h (enum varobj_languages): Remove.
(varobj_language_string): Remove declaration.
(varobj_get_language): Update declaration.
gdb/doc:
2013-11-07 Yao Qi <yao@codesourcery.com>
* gdb.texinfo (GDB/MI Variable Objects): Update doc about the
output of "-var-info-expression".
Hi,
When I add another name of language, I find field 'la_name' can be
'const char *'. This patch is to constify it.
gdb:
2013-11-07 Yao Qi <yao@codesourcery.com>
* language.c (language_str): Return const char *.
(add_language): Add const to 'language_names'
* language.h (struct language_defn) <la_name>: Add const.
(language_str: Update declaration.
When checking for the presence of the TDB regset, the current code
interprets ENODATA from PTRACE_GETREGSET as an indication that the TDB
regset *could* occur on this system, but the inferior stopped outside
a transaction. However, the Linux kernel actually reports ENODATA
even on systems without the transactional execution facility. Thus
the logic is now changed to check the TE field in the HWCAP as well.
This version also checks the existence of the TDB regset -- just to be
on the safe side when running on TE-enabled hardware with a kernel
that does not offer the TDB regset for some reason.
gdb/
* s390-linux-nat.c (s390_read_description): Consider the TE field
in the HWCAP for determining 'have_regset_tdb'.
gdbserver/
* linux-s390-low.c (HWCAP_S390_TE): New define.
(s390_arch_setup): Consider the TE field in the HWCAP for
determining 'have_regset_tdb'.
When reading objects with corrupt debug information it is possible that
the sibling chain can form a loop, which leads to an infinite loop and
memory exhaustion.
Avoid this situation by disregarding and DW_AT_sibling values that point
to a lower address than the current entry.
gdb/ChangeLog:
2013-11-06 Will Newton <will.newton@linaro.org>
PR gdb/12866
* dwarf2read.c (skip_one_die): Sanity check DW_AT_sibling
values. (read_partial_die): Likewise.
We add a new dir gdb.perf in testsuite for all performance tests.
However, current 'make check' logic will either run dejagnu in
directory testsuite or iterate all gdb.* directories which has *.exp
files. Both of them will run tests in gdb.perf. We want to achieve:
1) typical 'make check' should not run performance tests. In each perf
test case, GDB_PERFTEST_MODE is checked. If it doesn't exist, return.
2) run perf tests easily. We add a new makefile target 'check-perf'.
gdb:
2013-11-06 Yao Qi <yao@codesourcery.com>
* Makefile.in (check-perf): New target.
gdb/testsuite:
2013-11-06 Yao Qi <yao@codesourcery.com>
* Makefile.in (check-perf): New target.
* configure.ac (AC_OUTPUT): Output Makefile in gdb.perf.
* configure: Re-generated.
* gdb.perf/Makefile.in: New.
I noticed a large (100MB) restore took hours to complete. The problem
is memory_xfer_partial repeatedly mallocs and memcpys the entire
100MB buffer for breakpoint shadow handling only to find a small
portion of it is actually written.
The testcase that originally took hours now takes 50 seconds.
gdb/
2013-07-29 Anton Blanchard <anton@samba.org>
* target.c (memory_xfer_partial): Cap write to 4KB.
As discussed on the GDB ML[1], libc probes for longjmp were not being
loaded if a custom <arch>_get_longjmp_target function was not
implemented.
This is trivially fixed by moving the 'if (!gdbarch_get_longjmp_target_p
(gdbarch))' down, just bellow libc probe code and above the per-objfile
cache lookup.
While the condition could also be removed altogether with no
side-effects, it is in fact an optimization to avoid searching for
symbols if the arch doesn't provide support for get_longjmp_target().
This has been tested on PPC and PPC64.
[1] https://sourceware.org/ml/gdb/2013-10/msg00191.html
gdb/
2013-11-01 Tiago Stürmer Daitx <tdaitx@linux.vnet.ibm.com>
* breakpoint.c (create_longjmp_master_breakpoint): Allow libc
probe scan even when the arch provides no get_longjmp_target.
IMO, it doesn't make sense to map random syscall, fork, etc. events to
GDB_SIGNAL_TRAP, and possible have the debuggee see that trap. This
just seems conceptually wrong to me - these aren't real signals a
debuggee would ever see. In fact, when stopped for those events, on
Linux, the debuggee isn't in a signal-stop -- there's no way to
resume-and-deliver-signal at that point, for example. E.g., when
stopped at a fork event:
(gdb) catch fork
Catchpoint 2 (fork)
(gdb) c
Continuing.
Catchpoint 2 (forked process 4570), 0x000000323d4ba7c4 in __libc_fork () at ../nptl/sysdeps/unix/sysv/linux/fork.c:131
131 pid = ARCH_FORK ();
(gdb) set debug infrun 1
(gdb) signal SIGTRAP
Continuing with signal SIGTRAP.
infrun: clear_proceed_status_thread (process 4566)
infrun: proceed (addr=0xffffffffffffffff, signal=5, step=0)
infrun: resume (step=0, signal=5), trap_expected=0, current thread [process 4566] at 0x323d4ba7c4
infrun: wait_for_inferior ()
infrun: target_wait (-1, status) =
infrun: 4566 [process 4566],
infrun: status->kind = exited, status = 0
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_EXITED
[Inferior 1 (process 4566) exited normally]
infrun: stop_stepping
(gdb)
Note the signal went nowhere. It was swallowed.
Resuming with a SIGTRAP from a syscall event does queue the signal,
but doesn't deliver it immediately, like "signal SIGTRAP" from a real
signal would. It's still an artificial SIGTRAP:
(gdb) catch syscall
Catchpoint 2 (any syscall)
(gdb) c
Continuing.
Catchpoint 2 (call to syscall clone), 0x000000323d4ba7c4 in __libc_fork () at ../nptl/sysdeps/unix/sysv/linux/fork.c:131
131 pid = ARCH_FORK ();
(gdb) set debug infrun 1
(gdb) signal SIGTRAP
Continuing with signal SIGTRAP.
infrun: clear_proceed_status_thread (process 4622)
infrun: proceed (addr=0xffffffffffffffff, signal=5, step=0)
infrun: resume (step=0, signal=5), trap_expected=0, current thread [process 4622] at 0x323d4ba7c4
infrun: wait_for_inferior ()
infrun: target_wait (-1, status) =
infrun: 4622 [process 4622],
infrun: status->kind = exited syscall
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_SYSCALL_RETURN
infrun: syscall number = '56'
infrun: BPSTAT_WHAT_STOP_NOISY
infrun: stop_stepping
Catchpoint 2 (returned from syscall clone), 0x000000323d4ba7c4 in __libc_fork () at ../nptl/sysdeps/unix/sysv/linux/fork.c:131
131 pid = ARCH_FORK ();
(gdb) c
Continuing.
infrun: clear_proceed_status_thread (process 4622)
infrun: proceed (addr=0xffffffffffffffff, signal=144, step=0)
infrun: resume (step=0, signal=0), trap_expected=0, current thread [process 4622] at 0x323d4ba7c4
infrun: wait_for_inferior ()
infrun: target_wait (-1, status) =
infrun: 4622 [process 4622],
infrun: status->kind = stopped, signal = SIGTRAP
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc = 0x323d4ba7c4
infrun: random signal 5
Program received signal SIGTRAP, Trace/breakpoint trap.
infrun: stop_stepping
0x000000323d4ba7c4 in __libc_fork () at ../nptl/sysdeps/unix/sysv/linux/fork.c:131
131 pid = ARCH_FORK ();
(gdb)
In all the above, I used 'signal SIGTRAP' to emulate 'handle SIGTRAP
pass'. As described in "keep_going", 'handle SIGTRAP pass' does have
its place:
/* Do not deliver GDB_SIGNAL_TRAP (except when the user
explicitly specifies that such a signal should be delivered
to the target program). Typically, that would occur when a
user is debugging a target monitor on a simulator: the target
monitor sets a breakpoint; the simulator encounters this
breakpoint and halts the simulation handing control to GDB;
GDB, noting that the stop address doesn't map to any known
breakpoint, returns control back to the simulator; the
simulator then delivers the hardware equivalent of a
GDB_SIGNAL_TRAP to the program being debugged. */
... and I've made use of that myself when implementing/debugging
stubs/monitors. But in these cases, treating these events as SIGTRAP
possibly injects signals in the debuggee they'd never see otherwise,
because you need to use ptrace to enable these special events, which
aren't real signals.
There's more. Take this bit of handle_inferior_event, where we
determine whether a real signal (TARGET_WAITKIND_STOPPED) was random
or not:
if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP)
ecs->random_signal
= !((bpstat_explains_signal (ecs->event_thread->control.stop_bpstat,
GDB_SIGNAL_TRAP)
!= BPSTAT_SIGNAL_NO)
|| stopped_by_watchpoint
|| ecs->event_thread->control.trap_expected
|| (ecs->event_thread->control.step_range_end
&& (ecs->event_thread->control.step_resume_breakpoint
== NULL)));
else
{
enum bpstat_signal_value sval;
sval = bpstat_explains_signal (ecs->event_thread->control.stop_bpstat,
ecs->event_thread->suspend.stop_signal);
ecs->random_signal = (sval == BPSTAT_SIGNAL_NO);
if (sval == BPSTAT_SIGNAL_HIDE)
ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_TRAP;
}
Note that the
if (sval == BPSTAT_SIGNAL_HIDE)
ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_TRAP;
bit is only reacheable for signals != GDB_SIGNAL_TRAP. AFAICS, sval
can only be BPSTAT_SIGNAL_HIDE if nothing in the bpstat returns
BPSTAT_SIGNAL_PASS. So that excludes a "catch signal" for the signal
in question in the bpstat. All other catchpoints that aren't based on
breakpoints behind the scenes call process_event_stop_test directly
(don't pass through here) (well, almost all: TARGET_WAITKIND_LOADED
does have a fall through, but only for STOP_QUIETLY or
STOP_QUIETLY_NO_SIGSTOP, which still return before this code is
reached). Catchpoints that are implemented as breakpoints behind the
scenes can only appear in the bpstat if the signal was GDB_SIGNAL_TRAP
(bkpt_breakpoint_hit returns false otherwise). So that leaves a
target reporting a hardware watchpoint hit with a signal other than
GDB_SIGNAL_TRAP. And even then it looks quite wrong to me to
magically convert the signal into a GDB_SIGNAL_TRAP here too -- if the
user has set SIGTRAP to "handle pass", the program will see a trap
that gdb invented, not one the program would ever see without gdb in
the picture.
Tested on x86_64 Fedora 17.
gdb/
2013-10-31 Pedro Alves <palves@redhat.com>
* infrun.c (handle_syscall_event): Don't set or clear stop_signal.
(handle_inferior_event) <TARGET_WAITKIND_FORKED,
TARGET_WAITKIND_VFORKED>: Don't set stop_signal to
GDB_SIGNAL_TRAP, or clear it. Pass GDB_SIGNAL_0 to
bpstat_explains signal, instead of GDB_SIGNAL_TRAP.
<bpstat handling>: If the bpstat chain wants the signal to be
hidden, then set stop_signal to GDB_SIGNAL_0 instead of
GDB_SIGNAL_TRAP.
As suggested before, rename the S/390-related source files (tdep and nat)
such that "-linux-" occurs in the file name, like with other GNU/Linux
targets. Since no other operating system is currently supported by GDB
on this architecture, this isn't strictly necessary. But the old names
sometimes caused GDB contributors to miss these files when performing a
change that affects all GNU/Linux targets. The latest such incident was
observed here:
https://sourceware.org/ml/gdb-patches/2013-09/msg00619.html
gdb/
2013-10-30 Andreas Arnez <arnez@linux.vnet.ibm.com>
* s390-tdep.h: Rename to...
* s390-linux-tdep.h: ...here.
* s390-tdep.c: Rename to...
* s390-linux-tdep.c: ...here. Adjust #include.
* s390-nat.c: Rename to...
* s390-linux-nat.c: ...here. Adjust #include.
* config/s390/s390.mh: Rename to...
* config/s390/linux.mh: ...here. Reflect rename s390-nat.o ->
s390-linux-nat.o.
* configure.host: Reflect host rename "s390" -> "linux".
* configure.tgt: Reflect rename s390-tdep.o -> s390-linux-tdep.o.
* Makefile.in (ALL_TARGET_OBS): Likewise.
(HFILES_NO_SRCDIR): Reflect rename s390-tdep.h ->
s390-linux-tdep.h.
(ALLDEPFILES): Reflect rename of .c files.
gdb/
2013-10-30 Andreas Arnez <arnez@linux.vnet.ibm.com>
* s390-nat.c: Whitespace cleanup.
* s390-tdep.c: Likewise.
* s390-tdep.h: Remove empty line at end of file.
I tried to build gdb on the AIX machine in the GCC compile farm
(gcc111), but it failed in a couple of spots because gdb uses "reg" as
a variable name and the AIX <curses.h> defines "reg" to "register".
I saw that we already had a workaround for this lurking in utils.c, so
I just moved that to gdb_curses.h.
This fixed the problem on AIX and still builds on x86-64 Fedora 18.
2013-10-29 Tom Tromey <tromey@redhat.com>
* utils.c (reg): Move undefinition...
* gdb_curses.h: ... here. Update comment to mention AIX.
https://sourceware.org/ml/gdb-patches/2013-08/msg00171.html
gdb/ChangeLog
* infcmd.c (default_print_one_register_info): Use val_print to
print all values even optimized out or unavailable ones. Don't
try to print a raw form of optimized out or unavailable values.
gdb/testsuite/ChangeLog
* gdb.trace/unavailable.exp (gdb_unavailable_registers_test):
Expect <unavailable> pattern.
In registry.c:registry_clear_data, the registered data is iterated and
invoke each 'free' function with the data passed:
for (registration = data_registry->registrations, i = 0;
i < fields->num_data;
registration = registration->next, i++)
if (fields->data[i] != NULL && registration->data->free != NULL)
adaptor (registration->data->free, container, fields->data[i]);
we can see that data is passed to function 'free' and data is not NULL.
In each usage, we don't have to get the data again through key and
do NULL pointer checking. This patch is to simplify them.
gdb:
2013-10-29 Yao Qi <yao@codesourcery.com>
* auto-load.c (auto_load_pspace_data_cleanup): Get data from
parameter 'arg' instead of from program_space_data.
* objfiles.c (objfiles_pspace_data_cleanup): Likewise.
* solib-darwin.c (darwin_pspace_data_cleanup): Likewise.
* solib-dsbt.c (dsbt_pspace_data_cleanup): Likewise.
* solib-svr4.c (svr4_pspace_data_cleanup): Likewise.
* inflow.c (inflow_inferior_data_cleanup): Get data from
parameter 'arg' instead of inferior_data.
* registry.h: Add comments.
I was reading this, checking the the possible returns, and this
particular path confused a tiny little. Above we do:
if (!stopped_by_watchpoint)
{
...
return 0;
}
so any return after that always return true.
Tested on x86_64 Fedora 17.
gdb/
2013-10-28 Pedro Alves <palves@redhat.com>
* breakpoint.c (watchpoints_triggered)
<!target_stopped_data_address>: Hardcode return 1.
Now that all ecs->random_signal handing is always done before the
'process_event_stop_test' label, we can easily make that a real
function and actually give it a describing comment that somewhat makes
sense.
Reindenting the new function will be handled in a follow up patch.
2013-10-28 Pedro Alves <palves@redhat.com>
* infrun.c (process_event_stop_test): New function, factored out
from handle_inferior_event.
(handle_inferior_event): 'process_event_stop_test' is now a
function instead of a goto label -- adjust.
We only ever call "goto process_event_stop_test;" right after checking
that ecs->random_signal is clear. The code at the
process_event_stop_test label looks like:
/* For the program's own signals, act according to
the signal handling tables. */
if (ecs->random_signal)
{
... random signal handling ...
return;
}
else
{
... the stop tests that actually matter for the goto callers.
}
So this moves the label into the else branch. It'll make converting
process_event_stop_test into a function a bit clearer.
gdb/
2013-10-28 Pedro Alves <palves@redhat.com>
* infrun.c (handle_inferior_event): Move process_event_stop_test
goto label to the else branch of the ecs->random_signal check,
along with FRAME and GDBARCH re-fetching.
I recently added a new ecs->random_signal test after the "switch back to
stepped thread" code, and before the stepping tests. Looking at
making process_event_stop_test a proper function, I realized it'd be
better to keep ecs->random_signal related code together. To do that,
I needed to factor out the "switch back to stepped thread" code to a new
function, and call it in both the "random signal" and "not random
signal" paths.
gdb/
2013-10-28 Pedro Alves <palves@redhat.com>
* infrun.c (switch_back_to_stepped_thread): New function, factored
out from handle_inferior_event.
(handle_inferior_event): Adjust to call
switch_back_to_stepped_thread. Call it also at the tail of the
random signal handling, and return, instead of also handling
random signals just before the stepping tests.
'ecs' is always memset before being passed to handle_inferior_event.
The stop func is only filled in later in the flow. And since "Remove
dead sets/clears of ecs->random signal", nothing ever sets
ecs->random_signal before this part is reached either.
(Also tested with some added assertions in place.)
gdb/
2013-10-28 Pedro Alves <palves@redhat.com>
* infrun.c (clear_stop_func): Delete.
(handle_inferior_event): Don't call clear_stop_func and don't
clear 'ecs->random_signal'.
On 10/25/2013 11:34 AM, Joel Brobecker wrote:
> Also, as a followup, I think it would be beneficial if we renamed
> field "lang" in the varobj_root into "lang_ops". I think it's more
> descriptive, especially since "lang" is used elsewhere with different
> meanings (and types).
Here is the patch to rename 'lang' to 'lang_ops'. Committed as obvious.
gdb:
2013-10-27 Yao Qi <yao@codesourcery.com>
* varobj.c (struct varobj_root) <lang>: Rename to 'lang_ops'.
(varobj_create, varobj_get_path_expr): Update.
(varobj_value_has_mutated, varobj_update): Likewise.
(create_child_with_value, new_root_variable): Likewise.
(number_of_children, name_of_variable): Likewise.
(value_of_child, my_value_of_variable): Likewise.
(varobj_value_is_changeable_p): Likewise.
This is a follow-up series to move language stuff out of varobj.c.
This patch adds a new field la_varobj_ops in struct language_defn so
that each language has varobj-related options. Not every language
supports varobj, and the operations are identical to operations of c
languages.
'struct language_defn' is the ideal place to save all language-related
operations. After this patch, some cleanups can be done in patch 2/2,
which removes language-related stuff completely from varobj.c.
Regression tested on x86_64-linux.
gdb:
2013-10-25 Yao Qi <yao@codesourcery.com>
* language.h (struct lang_varobj_ops): Declare.
(struct language_defn) <la_varobj_ops>: New field.
* ada-lang.c: Include "varobj.h"
(defn ada_language_defn): Initialize field 'la_varobj_ops' by
ada_varobj_ops.
* c-lang.c: Include "varobj.h"
(c_language_defn): Initialize field 'la_varobj_ops' by
c_varobj_ops.
(cplus_language_defn): Initialize field 'la_varobj_ops' by
cplus_varobj_ops.
(asm_language_defn): Initialize field 'la_varobj_ops' by
default_varobj_ops.
(minimal_language_defn): Likewise.
* d-lang.c (d_language_defn): Likewise.
* f-lang.c (f_language_defn): Likewise.
* go-lang.c (go_language_defn): Likewise.
* m2-lang.c (m2_language_defn): Likewise.
* objc-lang.c (objc_language_defn): Likewise.
* opencl-lang.c (opencl_language_defn): Likewise.
* p-lang.c (pascal_language_defn): Likewise.
* language.c (unknown_language_defn): Likewise.
(auto_language_defn): Likewise.
(local_language_defn): Likewise.
* jv-lang.c (java_language_defn): Initialize field
'la_varobj_ops' by java_varobj_ops.
* varobj.c (varobj_create): Update.
* varobj.h (default_varobj_ops): Define macro.
With:
struct static_struct { static int aaa; };
struct static_struct sss;
int main () { return 0; }
We get:
(gdb) p sss
$1 = {static aaa = <optimized out>}
(gdb) p sss.aaa
field aaa is nonexistent or has been optimized out
Note that the "field aaa ..." message is an error being thrown.
GDB is graceful everywhere else when printing optimized out values.
IOW it usually prints an <optimized out> value and puts that in the
value history. I see no reason for here to be different, more so that
when the print the whole "containing" object (well, it's a static
field, so it's not really a container), we already print <optimized
out>.
After the patch:
(gdb) p sss
$1 = {static aaa = <optimized out>}
(gdb) p sss.aaa
$2 = <optimized out>
The value_entirely_optimized_out checks are there to preserve
behavior. Without those, if the static field is a struct/union, GDB
would go and print its fields one by one (and print <optimized out>
for each).
Tested on x86_64 Fedora 17.
gdb/
2013-10-25 Pedro Alves <palves@redhat.com>
* cp-valprint.c (cp_print_value_fields): No longer handle a NULL
static field value.
(cp_print_static_field): If the value is entirely optimized out,
print <optimized out> here.
* jv-valprint.c (java_print_value_fields): No longer handle a NULL
static field value.
* p-valprint.c (pascal_object_print_static_field): If the value is
entirely optimized out, print <optimized out> here.
* valops.c (do_search_struct_field)
(value_struct_elt_for_reference): No longer handle a NULL static
field value.
* value.c (value_static_field): Return an optimized out value
instead of NULL.
gdb/testsuite/
2013-10-25 Pedro Alves <palves@redhat.com>
* gdb.cp/m-static.exp: Adjust expected output of printing a
nonexistent or optimized out static field. Also test printing the
the "container" object.
When I do 'si', I find many 'qXfer:traceframe-info:read' packets are sent,
which is not necessary. It slows down the single step.
(gdb) si
Sending packet: $qTStatus#49...Packet received: T0;tnotrun:0;tframes:0;tcreated:0;tfree:500000;tsize:500000;circular:0;disconn:0;starttime:0;stoptime:0;username:;notes::
Sending packet: $Z0,80483c7,1#b4...Packet received: OK
Sending packet: $Z0,4ce5b6b0,1#6e...Packet received: OK
Sending packet: $QPassSignals:e;10;14;17;1a;1b;1c;21;24;25;2c;4c;#5f...Packet received: OK
Sending packet: $vCont;s:p1b15.1b15;c#20...Packet received: T0505:44efffbf;04:44efffbf;08:d1830408;thread:p1b15.1b15;core:3;
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $mbfffef40,40#c0...Packet received: d183040878efffbf2e840408030000000000a040030000000500000070efffbf07000000010000004984040807000000030000000500000000000000b396e84c
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $z0,80483c7,1#d4...Packet received: OK
Sending packet: $z0,4ce5b6b0,1#8e...Packet received: OK
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
This problem was introduced by this patch
(https://sourceware.org/ml/gdb-patches/2013-04/msg00000.html), in
which get_traceframe_number is not checked before calling
traceframe_available_memory. This patch moves the check to
remote_traceframe_info, say, if GDB doesn't have traceframe selected, GDB
doesn't need to send qXfer:traceframe-info:read packets.
With this patch applied, there is no qXfer:traceframe-info:read sent
out and single step is speed up a little bit.
Here is the experiment I did:
Num of single step Original Patched
single-step cpu_time 10000 8.08 7.57
single-step cpu_time 20000 16.23 14.23
single-step cpu_time 30000 24.19 21.59
single-step cpu_time 40000 32.49 28.0
single-step wall_time 10000 14.1974210739 13.2641420364
single-step wall_time 20000 28.5278921127 25.0541369915
single-step wall_time 30000 42.5864038467 38.0038759708
single-step wall_time 40000 57.2107698917 49.2350611687
single-step vmsize 10000 16128 16388
single-step vmsize 20000 16128 16388
single-step vmsize 30000 16260 16520
single-step vmsize 40000 16444 16704
The patch is tested on x86_64-linux.
gdb:
2013-10-24 Yao Qi <yao@codesourcery.com>
* remote.c (remote_traceframe_info): Return early if
traceframe is not selected.
gdb/
* linux-tdep.c (linux_corefile_thread_callback): Propagate any
failure from register information collection.
gdb/testsuite/
* lib/gdb.exp (gdb_gcore_cmd): Also handle a "Target does not
support core file generation" reply.
Occasionaly we hear about people having problems with GDB not being
able to start programs (with "run"/"start"). GDB spawns a shell to
start the program, and most often, it'll be the case that the problem
is actually with the user's shell setup.
GDB has code to disable the use of the shell to start programs.
That's the STARTUP_WITH_SHELL macro that native targets could set to 0
in their nm.h file (though no target actually uses it nowadays).
This patch makes that setting a run-time knob instead. This will be
useful to quickly diagnose such shell issues, and might also come in
handy at other times (such as when debugging the shell itself, if you
don't have a different shell handy).
gdb/
2013-10-24 Pedro Alves <palves@redhat.com>
* NEWS (New options): Mention set/show startup-with-shell.
* config/alpha/nm-osf3.h (START_INFERIOR_TRAPS_EXPECTED): Set to 2
instead of 3.
* fork-child.c (fork_inferior, startup_inferior): Handle 'set
startup-with-shell'.
(show_startup_with_shell): New function.
(_initialize_fork_child): Register the set/show startup-with-shell
commands.
* inf-ptrace.c (inf_ptrace_create_inferior): Remove comment.
* inf-ttrace.c (inf_ttrace_him): Remove comment.
* procfs.c (procfs_init_inferior): Remove comment.
* infcmd.c (startup_with_shell): New global.
* inferior.h (startup_with_shell): Declare global.
(STARTUP_WITH_SHELL): Delete.
(START_INFERIOR_TRAPS_EXPECTED): Set to 1 by default instead of 2.
gdb/doc/
2013-10-24 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Starting): Document set/show startup-with-shell.
The other day while debugging something related to random signals, I
got confused with "set debug infrun 1" output, for it said:
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc = 0x323d4e8b94
infrun: random signal 20
On GNU/Linux, 20 is SIGTSTP. For some reason, it took me a few
minutes to realize that 20 is actually a GDB signal number, not a
target signal number (duh!). In any case, I propose making GDB's
output clearer here:
One way would be to use gdb_signal_to_name, like already used
elsewhere:
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc = 0x323d4e8b94
infrun: random signal SIGCHLD (20)
but I think that might confuse someone too ("20? Why does GDB believe
SIGCHLD is 20?"). So I thought of printing the enum string instead:
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc = 0x323d4e8b94
infrun: random signal GDB_SIGNAL_CHLD (20)
Looking at a more complete infrun debug log, we had actually printed
the (POSIX) signal name name a bit before:
infrun: target_wait (-1, status) =
infrun: 9300 [Thread 0x7ffff7fcb740 (LWP 9300)],
infrun: status->kind = stopped, signal = SIGCHLD
...
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc = 0x323d4e8b94
infrun: random signal 20
So I'm now thinking that it'd be even better to make infrun output
consistently use the enum symbol string, like so:
infrun: clear_proceed_status_thread (Thread 0x7ffff7fca700 (LWP 25663))
infrun: clear_proceed_status_thread (Thread 0x7ffff7fcb740 (LWP 25659))
- infrun: proceed (addr=0xffffffffffffffff, signal=144, step=1)
+ infrun: proceed (addr=0xffffffffffffffff, signal=GDB_SIGNAL_DEFAULT, step=1)
- infrun: resume (step=1, signal=0), trap_expected=0, current thread [Thread 0x7ffff7fcb740 (LWP 25659)] at 0x400700
+ infrun: resume (step=1, signal=GDB_SIGNAL_0), trap_expected=0, current thread [Thread 0x7ffff7fcb740 (LWP 25659)] at 0x400700
infrun: wait_for_inferior ()
infrun: target_wait (-1, status) =
infrun: 25659 [Thread 0x7ffff7fcb740 (LWP 25659)],
- infrun: status->kind = stopped, signal = SIGCHLD
+ infrun: status->kind = stopped, signal = GDB_SIGNAL_CHLD
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc = 0x400700
- infrun: random signal 20
+ infrun: random signal (GDB_SIGNAL_CHLD)
infrun: random signal, keep going
- infrun: resume (step=1, signal=20), trap_expected=0, current thread [Thread 0x7ffff7fcb740 (LWP 25659)] at 0x400700
+ infrun: resume (step=1, signal=GDB_SIGNAL_CHLD), trap_expected=0, current thread [Thread 0x7ffff7fcb740 (LWP 25659)] at 0x400700
infrun: prepare_to_wait
infrun: target_wait (-1, status) =
infrun: 25659 [Thread 0x7ffff7fcb740 (LWP 25659)],
- infrun: status->kind = stopped, signal = SIGTRAP
+ infrun: status->kind = stopped, signal = GDB_SIGNAL_TRAP
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc = 0x400704
infrun: stepi/nexti
infrun: stop_stepping
GDB's signal numbers are public and hardcoded (see
include/gdb/signals.h), so there's really no need to clutter the
output with numeric values in some places while others not. Replacing
the magic "144" with GDB_SIGNAL_DEFAULT in "proceed"'s debug output
(see above) I think is quite nice.
I posit that all this makes it clearer to newcomers that GDB has its
own signal numbering (and that there must be some mapping going on).
Tested on x86_64 Fedora 17.
gdb/
2013-10-23 Pedro Alves <palves@redhat.com>
* common/gdb_signals.h (gdb_signal_to_symbol_string): Declare.
* common/signals.c: Include "gdb_assert.h".
(signals): New field 'symbol'.
(SET): Use the 'symbol' parameter.
(gdb_signal_to_symbol_string): New function.
* infrun.c (handle_inferior_event) <random signal>: In debug
output, print the random signal enum as string in addition to its
number.
* target/waitstatus.c (target_waitstatus_to_string): Print the
signal's enum value as string instead of the (POSIX) signal name.
In the first hunk, the format string was off-by-one for cmd, and cmd
itself was larger than the maximum size required. cmd was reduced in
size and the format string adjusted.
In the second hunk, the format string was off-by-one for local_address,
remote_address and extra, although the buffers for the two addresses
were large enough for this not to matter. The specifiers for the two
addresses was corrected, and a number of unused variables including
extra were suppressed from parsing.
In the third hunk, the format string was off-by-one for name,
dependencies and status. This code was rewritten using strtok since
dependencies can be arbitrarily long.
gdb/
2013-10-23 Gary Benson <gbenson@redhat.com>
PR 16013
* common/linux-osdata.c (command_from_pid): Reduced size of cmd
from 32 to 18. Adjusted fscanf format string accordingly.
(Avoids leaving cmd unterminated.)
(print_sockets): Do not parse tlen, inode, sl, timeout, txq, rxq,
trun, retn or extra. (Avoids leaving extra unterminated.) Check
that local_address and remote_address will not overflow.
(linux_xfer_osdata_modules): Parse lines using strtok to avoid
leaving dependencies unterminated. Parse size as "%u" to match
definition.
'*ecs' is always memset by handle_inferior_event's callers, so all
these clears are unnecessary. There's one place that sets the flag to
true, but, afterwards, before ecs->random_signal is ever read, we
reach the part of handle_inferior_even that clears ecs->random_signal,
among other things:
clear_stop_func (ecs);
ecs->event_thread->stepping_over_breakpoint = 0;
bpstat_clear (&ecs->event_thread->control.stop_bpstat);
ecs->event_thread->control.stop_step = 0;
stop_print_frame = 1;
ecs->random_signal = 0;
stopped_by_random_signal = 0;
So all these ecs->random_signal accesses are dead code.
Tested on x86_64 Fedora 17.
gdb/
2013-10-22 Pedro Alves <palves@redhat.com>
* infrun.c (handle_inferior_event) <thread hop>: Don't clear or
set ecs->random signal.
https://sourceware.org/ml/gdb-patches/2013-10/msg00477.html
gdb/ChangeLog
* breakpoint.c (update_watchpoint): If hardware watchpoints are
forced off, downgrade them to software watchpoints if possible,
and error out if not possible.
(watch_command_1): Move watchpoint type selection closer to
watchpoint creation, and extend the comments.
gdb/testsuite/ChangeLog
* gdb.base/watchpoints.exp: Add test for setting software
watchpoints of different types before starting the inferior.
I noticed something odd while doing "stepi" over a fork syscall:
...
(gdb) set disassemble-next-line on
...
(gdb) si
0x000000323d4ba7c2 131 pid = ARCH_FORK ();
0x000000323d4ba7a4 <__libc_fork+132>: 64 4c 8b 04 25 10 00 00 00 mov %fs:0x10,%r8
0x000000323d4ba7ad <__libc_fork+141>: 31 d2 xor %edx,%edx
0x000000323d4ba7af <__libc_fork+143>: 4d 8d 90 d0 02 00 00 lea 0x2d0(%r8),%r10
0x000000323d4ba7b6 <__libc_fork+150>: 31 f6 xor %esi,%esi
0x000000323d4ba7b8 <__libc_fork+152>: bf 11 00 20 01 mov $0x1200011,%edi
0x000000323d4ba7bd <__libc_fork+157>: b8 38 00 00 00 mov $0x38,%eax
=> 0x000000323d4ba7c2 <__libc_fork+162>: 0f 05 syscall
0x000000323d4ba7c4 <__libc_fork+164>: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
0x000000323d4ba7ca <__libc_fork+170>: 0f 87 2b 01 00 00 ja 0x323d4ba8fb <__libc_fork+475>
(gdb) si
0x000000323d4ba7c4 131 pid = ARCH_FORK ();
0x000000323d4ba7a4 <__libc_fork+132>: 64 4c 8b 04 25 10 00 00 00 mov %fs:0x10,%r8
0x000000323d4ba7ad <__libc_fork+141>: 31 d2 xor %edx,%edx
0x000000323d4ba7af <__libc_fork+143>: 4d 8d 90 d0 02 00 00 lea 0x2d0(%r8),%r10
0x000000323d4ba7b6 <__libc_fork+150>: 31 f6 xor %esi,%esi
0x000000323d4ba7b8 <__libc_fork+152>: bf 11 00 20 01 mov $0x1200011,%edi
0x000000323d4ba7bd <__libc_fork+157>: b8 38 00 00 00 mov $0x38,%eax
0x000000323d4ba7c2 <__libc_fork+162>: 0f 05 syscall
=> 0x000000323d4ba7c4 <__libc_fork+164>: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
0x000000323d4ba7ca <__libc_fork+170>: 0f 87 2b 01 00 00 ja 0x323d4ba8fb <__libc_fork+475>
(gdb) si
0x000000323d4ba7c4 131 pid = ARCH_FORK ();
0x000000323d4ba7a4 <__libc_fork+132>: 64 4c 8b 04 25 10 00 00 00 mov %fs:0x10,%r8
0x000000323d4ba7ad <__libc_fork+141>: 31 d2 xor %edx,%edx
0x000000323d4ba7af <__libc_fork+143>: 4d 8d 90 d0 02 00 00 lea 0x2d0(%r8),%r10
0x000000323d4ba7b6 <__libc_fork+150>: 31 f6 xor %esi,%esi
0x000000323d4ba7b8 <__libc_fork+152>: bf 11 00 20 01 mov $0x1200011,%edi
0x000000323d4ba7bd <__libc_fork+157>: b8 38 00 00 00 mov $0x38,%eax
0x000000323d4ba7c2 <__libc_fork+162>: 0f 05 syscall
=> 0x000000323d4ba7c4 <__libc_fork+164>: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
0x000000323d4ba7ca <__libc_fork+170>: 0f 87 2b 01 00 00 ja 0x323d4ba8fb <__libc_fork+475>
(gdb) si
0x000000323d4ba7ca 131 pid = ARCH_FORK ();
0x000000323d4ba7a4 <__libc_fork+132>: 64 4c 8b 04 25 10 00 00 00 mov %fs:0x10,%r8
0x000000323d4ba7ad <__libc_fork+141>: 31 d2 xor %edx,%edx
0x000000323d4ba7af <__libc_fork+143>: 4d 8d 90 d0 02 00 00 lea 0x2d0(%r8),%r10
0x000000323d4ba7b6 <__libc_fork+150>: 31 f6 xor %esi,%esi
0x000000323d4ba7b8 <__libc_fork+152>: bf 11 00 20 01 mov $0x1200011,%edi
0x000000323d4ba7bd <__libc_fork+157>: b8 38 00 00 00 mov $0x38,%eax
0x000000323d4ba7c2 <__libc_fork+162>: 0f 05 syscall
0x000000323d4ba7c4 <__libc_fork+164>: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
=> 0x000000323d4ba7ca <__libc_fork+170>: 0f 87 2b 01 00 00 ja 0x323d4ba8fb <__libc_fork+475>
Notice how the third "si" didn't actually make progress.
Turning on infrun and lin-lwp debug, we see:
(gdb)
infrun: clear_proceed_status_thread (process 5252)
infrun: proceed (addr=0xffffffffffffffff, signal=144, step=1)
infrun: resume (step=1, signal=0), trap_expected=0, current thread [process 5252] at 0x323d4ba7c4
LLR: Preparing to step process 5252, 0, inferior_ptid process 5252
RC: Not resuming sibling process 5252 (not stopped)
LLR: PTRACE_SINGLESTEP process 5252, 0 (resume event thread)
sigchld
infrun: wait_for_inferior ()
linux_nat_wait: [process -1], []
LLW: enter
LNW: waitpid(-1, ...) returned 5252, No child processes
LLW: waitpid 5252 received Child exited (stopped)
LLW: Candidate event Child exited (stopped) in process 5252.
SEL: Select single-step process 5252
LLW: exit
infrun: target_wait (-1, status) =
infrun: 5252 [process 5252],
infrun: status->kind = stopped, signal = SIGCHLD
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc = 0x323d4ba7c4
infrun: random signal 20
infrun: stepi/nexti
infrun: stop_stepping
So the inferior got a SIGCHLD (because the fork child exited while
we're doing 'si'), and since that signal is set to "nostop noprint
pass" (by default), it's considered a random signal, so it should not
cause a stop. But, it resulted in an immediate a stop_stepping call
anyway. So the single-step never really finished.
This is a regression caused by:
[[PATCH] Do not respawn signals, take 2.]
https://sourceware.org/ml/gdb-patches/2012-06/msg00702.html
Specifically, caused by this change (as mentioned in the "the lost
step issue first" part of that mail):
diff --git a/gdb/infrun.c b/gdb/infrun.c
index 53db335..3e8dbc8 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -4363,10 +4363,8 @@ process_event_stop_test:
(leaving the inferior at the step-resume-breakpoint without
actually executing it). Either way continue until the
breakpoint is really hit. */
- keep_going (ecs);
- return;
}
-
+ else
/* Handle cases caused by hitting a breakpoint. */
{
That made GDB fall through to the
> /* In all-stop mode, if we're currently stepping but have stopped in
> some other thread, we need to switch back to the stepped thread. */
> if (!non_stop)
part. However, if we don't have a stepped thread to get back to,
we'll now also fall through to all the "stepping" tests. For line
stepping, that'll turn out okay, as we'll just end up realizing the
thread is still in the stepping range, and needs to be re-stepped.
However, for stepi/nexti, we'll reach:
if (ecs->event_thread->control.step_range_end == 1)
{
/* It is stepi or nexti. We always want to stop stepping after
one instruction. */
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: stepi/nexti\n");
ecs->event_thread->control.stop_step = 1;
print_end_stepping_range_reason ();
stop_stepping (ecs);
return;
}
and stop, even though the thread actually made no progress. The fix
is to restore the keep_going call, but put it after the "switch back
to the stepped thread" code, and before the stepping tests.
Tested on x86_64 Fedora 17, native and gdbserver. New test included.
gdb/
2013-10-18 Pedro Alves <palves@redhat.com>
PR gdb/16062
* infrun.c (handle_inferior_event): Keep going if we got a random
signal we should not stop for, instead of falling through to the
step tests.
gdb/testsuite/
2013-10-18 Pedro Alves <palves@redhat.com>
PR gdb/16062
* gdb.threads/stepi-random-signal.c: New file.
* gdb.threads/stepi-random-signal.exp: New file.
This patch fixes PR gdb/15995.
The bug here is that gdb's printf command does not flush the output
stream. This makes a printf that is not newline-terminated interleave
incorrectly with other forms of output, such as that generated via a
call to an external program using "shell".
I note that the "output" command already does this flushing.
The fix is to call gdb_flush in printf_command.
Built and regtested on x86-64 Fedora 18.
New test case included.
PR gdb/15995:
* printcmd.c (printcmd): Call gdb_flush.
* gdb.base/printcmds.exp (test_printf): Test printf flushing.
I noticed that one field in elfread.c:struct elfinfo is unused.
This patch removes it.
* elfread.c (struct elfinfo) <stabindexsect>: Remove.
(elf_locate_sections): Update.
As a result of previous patch, extern functions in ada-varobj.c can be
made static, and ada-varobj.h can be removed too.
gdb:
2013-10-17 Yao Qi <yao@codesourcery.com>
* Makefile.in (HFILES_NO_SRCDIR): Remove ada-varobj.h.
* ada-varobj.c: Remove the include of ada-varobj.h.
(ada_varobj_get_number_of_children): Declare.
(ada_varobj_get_name_of_child): Make it static.
(ada_varobj_get_path_expr_of_child): Likewise.
(ada_varobj_get_value_of_child): Likewise.
(ada_varobj_get_type_of_child): Likewise.
(ada_varobj_get_value_of_array_variable): Likewise.
* ada-varobj.h: Remove.
The first one, dw2_get_real_path from gdb/dwarf2read.c, was actually
making use of OBSTACK_CALLOC which already calls "sizeof" for its third
argument.
The second, download_tracepoint_1 from gdb/gdbserver/tracepoint.c, was
explicitly calling "sizeof" inside another "sizeof".
This patch fixed both functions.
gdb/ChangeLog
2013-10-16 Sergio Durigan Junior <sergiodj@redhat.com>
PR gdb/16014
* dwarf2read.c (dw2_get_real_path): Remove unnecessary call to
sizeof.
gdb/gdbserver/ChangeLog
2013-10-16 Sergio Durigan Junior <sergiodj@redhat.com>
PR gdb/16014
* tracepoint.c (download_tracepoint_1): Remove unnecessary double
call to sizeof.
both from gdb/target.c, do a "return" calling another function. But both
are marked as void. Despite the fact that the functions being called are
void as well, this is wrong. This patch fixes this by calling the functions
and then returning in the next line.
2013-10-16 Sergio Durigan Junior <sergiodj@redhat.com>
PR gdb/16042
* target.c (target_disable_btrace): Fix invalid return value for
void function.
(target_teardown_btrace): Likewise.
gdb/
* nios2-tdep.c (nios2_reg_names): Use "sstatus" rather than "ba"
as the preferred name of r30.
* nios2-linux-tdep.c (reg_offsets): Likewise.
* features/nios2-cpu.xml: Likewise.
* features/nios2-linux.c: Regenerated.
* features/nios2.c: Regenerated.
* regformats/nios2-linux.dat: Regenerated.
gdb/
2013-10-13 Jan Kratochvil <jan.kratochvil@redhat.com>
Canonicalize directories for EXEC_FILENAME.
* exec.c (exec_file_attach): Use gdb_realpath_keepfile for
exec_filename.
* utils.c (gdb_realpath_keepfile): New function.
* utils.h (gdb_realpath_keepfile): New declaration.
gdb/testsuite/
2013-10-13 Jan Kratochvil <jan.kratochvil@redhat.com>
Canonicalize directories for EXEC_FILENAME.
* gdb.base/argv0-symlink.exp
(kept file symbolic link name for info inferiors): New.
(kept directory symbolic link name): Setup kfail.
(kept directory symbolic link name for info inferiors): New.
This patch introduces two new GDB/MI commands implementing the equivalent
of the "catch exception" and "catch assert" GDB/CLI commands.
gdb/ChangeLog:
* breakpoint.h (init_ada_exception_breakpoint): Add parameter
"enabled".
* breakpoint.c (init_ada_exception_breakpoint): Add parameter
"enabled". Set B->ENABLE_STATE accordingly.
* ada-lang.h (ada_exception_catchpoint_kind): Move here from
ada-lang.c.
(create_ada_exception_catchpoint): Add declaration.
* ada-lang.c (ada_exception_catchpoint_kind): Move to ada-lang.h.
(create_ada_exception_catchpoint): Make non-static. Add new
parameter "disabled". Use it in call to
init_ada_exception_breakpoint.
(catch_ada_exception_command): Add parameter "enabled" in call
to create_ada_exception_catchpoint.
(catch_assert_command): Likewise.
* mi/mi-cmds.h (mi_cmd_catch_assert, mi_cmd_catch_exception):
Add declarations.
* mi/mi-cmds.c (mi_cmds): Add the "catch-assert" and
"catch-exception" commands.
* mi/mi-cmd-catch.c: Add #include "ada-lang.h".
(mi_cmd_catch_assert, mi_cmd_catch_exception): New functions.
This is in preparation for making that type public, in order to be
able to use make create_ada_exception_catchpoint public as well,
making it usable from the GDB/MI implementation.
gdb/ChangeLog:
* ada-lang.c (enum ada_exception_catchpoint_kind): Renames
"enum exception_catchpoint_kind". Replace the "ex_" prefix
of all its enumerates with "ada_". Update the rest of this
file throughout.
This patch reworks a bit how the different steps required to insert
an Ada exception catchpoints are organized. They used to be:
1. Call a "decode" function which does:
1.a. Parse the command and its arguments
1.b. Create a SAL & OPS from some of those arguments
2. Call create_ada_exception_catchpoint using SAL as well
as some of the arguments extracted above.
The bulk of the change consists in integrating step (1.b) into
step (2) in order to turn create_ada_exception_catchpoint into
a function whose arguments are all user-level concepts. This
paves the way from a straightforward implementation of the equivalent
commands in the GDB/MI interpreter.
gdb/ChangeLog:
* ada-lang.c (ada_decode_exception_location): Delete.
(create_ada_exception_catchpoint): Remove arguments "sal",
"addr_string" and "ops". Add argument "ex_kind" instead.
Adjust implementation accordingly, calling ada_exception_sal
to get the entities it no longer gets passed as arguments.
Document the function's arguments.
(catch_ada_exception_command): Use catch_ada_exception_command_split
instead of ada_decode_exception_location, and update call to
create_ada_exception_catchpoint.
(catch_ada_assert_command_split): Renames
ada_decode_assert_location. Remove parameters "addr_string" and
"ops", and now returns void. Adjust implementation accordingly.
Update the function documentation.
(catch_assert_command): Use catch_ada_assert_command_split
instead of ada_decode_assert_location. Update call to
create_ada_exception_catchpoint.
Consider the following example:
% gdb -q -batch -ex 'source nonexistant-file'
[nothing]
One would have at least expected the debugger to warn about
not finding the file, similar to the error shown when using
a more interactive mode. Eg:
(gdb) source nonexistant-file
nonexistant-file: No such file or directory.
Not raising an error appears to be intentional, presumably in order
to prevent this situation from stoping the execution of a GDB script.
But the lack of at least a warning makes it harder for a user to
diagnose any issue, if the file was expected to be there and readable.
This patch adds a warning in that case:
% gdb -q -batch -ex 'source nonexistant-file'
warning: nonexistant-file: No such file or directory.
gdb/ChangeLog:
* utils.h (perror_warning_with_name): Add declaration.
* utils.c (perror_warning_with_name): New function.
* cli/cli-cmds.c (source_script_with_search): Add call to
perror_warning_with_name if from_tty is nul.
gdb/testsuite/ChangeLog:
* gdb.base/source-nofile.gdb: New file.
* gdb.base/source.exp: Add two tests verifying the behavior when
the "source" command is given a non-existant filename.
The main purpose of this patch is to extract the part of
throw_perror_with_name that computes a string providing the system
error message combined with a prefix string. This will become useful
later on to provide a routine which prints a warning using that
perror_string, rather than throwing an error.
gdb/ChangeLog:
* utils.c (perror_string): New function, extracted out of
throw_perror_with_name.
(throw_perror_with_name): Rework to use perror_string.
If we are running on a Linux platform we should call linux_init_abi
in order to get all the useful hooks it enables.
gdb/ChangeLog:
2013-10-10 Will Newton <will.newton@linaro.org>
* aarch64-linux-tdep.c (aarch64_linux_init_abi): Call
linux_init_abi.
This patch renames the "set/show remotebaud" commands into
"set/show serial baud", and moves its implementation into serial.c.
It also moves the "baud_rate" global from top.c to serial.c, where
the new code is being added (the alternative was to add an include
of target.h).
And to facilitate the transition to the new setting name, this
patch also preserves the old commands, and marks them as deprecated
to alert the users of the change.
gdb/ChangeLog:
* cli/cli-cmds.c (show_baud_rate): Moved to serial.c as
serial_baud_show_cmd.
(_initialize_cli_cmds): Delete the code creating the
"set/show remotebaud" commands.
* serial.c (baud_rate): Move here from top.c.
(serial_baud_show_cmd): Move here from cli/cli-cmds.c.
(_initialize_serial): Create "set/show serial baud" commands.
Add "set/show remotebaud" command aliases.
* top.c (baud_rate): Moved to serial.c.
* NEWS: Document the new "set/show serial baud" commands,
replacing "set/show remotebaud".
gdb/doc/ChangeLog:
* gdb.texinfo: Replace "set remotebaud" and "show remotebaud"
by "set serial baud" and "show serial baud" (resp) throughout.
target_read_memory & friends build on top of target_read (thus on top
of the target_xfer machinery), but turn all errors to EIO, an errno
value. I think we'd better convert all these to return a
target_xfer_error too, like target_xfer_partial in a previous patch.
The patch starts by doing that.
(The patch does not add a enum target_xfer_error value for '0'/no
error, and likewise does not change the return type of several of
these functions to enum target_xfer_error, because different functions
return '0' with different semantics.)
I audited the tree for memory_error calls, EIO checks, places where
GDB hardcodes 'errno = EIO', and also for strerror calls. What I
found is that nowadays there's really no need to handle random errno
values, other than the EIOs gdb itself hardcodes. No doubt errno
values would appear in common code back in the day when
target_xfer_memory was the main interface to access memory, but
nowadays, any errno value that deprecated interface could return is
just absorved by default_xfer_partial:
else if (xfered == 0 && errno == 0)
/* "deprecated_xfer_memory" uses 0, cross checked against
ERRNO as one indication of an error. */
return 0;
else
return -1;
There are two places in the code that check for EIO and print "out of
bounds", and defer to strerror for other errors. That's
c-lang.c:c_get_string, and valprint.c.:val_print_string. AFAICT, the
strerror branch can never be reached nowadays, as the only error
possible to get at those points is EIO, given that it's GDB itself
that set that errno value (in target_read_memory, etc.).
breakpoint.c:insert_bp_location always prints the error val as if an
errno, returned by target_insert_breakpoint, with strerr. Now the
error here is either always EIO for mem-break.c targets (again
hardcoded by the target_read_memory/target_write_memory functions), so
this always prints "Input/output error" or similar (depending on
host), or, for remote targets (and probably others), this gem:
Error accessing memory address 0x80200400: Unknown error -1.
This patch makes these 3 places print the exact same error
memory_error prints. This changes output, but I think this is better,
for making memory error output consistent with other commands, and, it
means we have a central place to tweak for memory errors.
E.g., this changes:
Cannot insert breakpoint 1.
Error accessing memory address 0x5fc660: Input/output error.
to:
Cannot insert breakpoint 1.
Cannot access memory at address 0x5fc660
Which I find pretty much acceptable.
Surprisingly, only py-prettyprint.exp had a regression, for needing an
adjustment. I also grepped the testsuite for the old errors, and
found no other hits.
Now that errno values aren't used anywhere in any of these memory
access related routines, I made memory_error itself take a
target_xfer_error instead of an errno. The new
target_xfer_memory_error function added recently is no longer
necessary, and is thus removed.
Tested on x86_64 Fedora 17, native and gdbserver.
gdb/
2013-10-09 Pedro Alves <palves@redhat.com>
* breakpoint.c (insert_bp_location): Use memory_error_message to
build the memory error string.
* c-lang.c: Include "gdbcore.h".
(c_get_string): Use memory_error to throw error.
(target_xfer_memory_error): Delete.
(memory_error_message): New, factored out from
target_xfer_memory_error.
(memory_error): Change parameter type to target_xfer_error.
Rewrite.
(read_memory): Use memory_error instead of
target_xfer_memory_error.
* gdbcore.h: Include "target.h".
(memory_error): Change parameter type to target_xfer_error.
(memory_error_message): Declare function.
* target.c (target_read_memory, target_read_stack)
(target_write_memory, target_write_raw_memory): Return
TARGET_XFER_E_IO on error. Adjust comments.
(get_target_memory): Pass TARGET_XFER_E_IO to memory_error,
instead of EIO.
* target.h (target_read, target_insert_breakpoint)
(target_remove_breakpoint): Adjust comments.
* valprint.c (partial_memory_read): Rename parameter, and adjust
comment.
(val_print_string): Use memory_error_message to build the memory
error string.
gdb/testsuite/
2013-10-09 Pedro Alves <palves@redhat.com>
* gdb.python/py-prettyprint.exp (run_lang_tests): Adjust expected
output.
gdb/
2013-10-09 Jan Kratochvil <jan.kratochvil@redhat.com>
* common/filestuff.c (gdb_fopen_cloexec): Remove initialization of
result variable. Rename variable fopen_e_ever_failed to
fopen_e_ever_failed_einval. Retry fopen only for errno EINVAL.
This removes another yet instance of a deprecated_xfer_memory user.
Tested by building a --enable-targets=all gdb, on x86-64 Fedora 17.
gdb/
2013-10-09 Pedro Alves <palves@redhat.com>
* monitor.c (monitor_write_memory, monitor_write_memory_bytes)
(monitor_write_memory_longlongs, monitor_write_memory_block):
Constify 'myaddr' parameter.
(monitor_xfer_memory): Adjust interface as monitor_xfer_partial
helper.
(monitor_xfer_partial): New function.
(init_base_monitor_ops): Don't install a deprecated_xfer_memory
hook. Install a to_xfer_partial hook.
* bfd-in2.h: Rebuild.
* opncls.c (bfd_get_alt_debug_link_info): Change type of
buildid_len to bfd_size_type.
gdb
* dwarf2read.c (dwarf2_get_dwz_file): Update for type change in
bfd_get_alt_debug_link_info.
gdb/
2013-10-09 Jan Kratochvil <jan.kratochvil@redhat.com>
New flag OBJF_NOT_FILENAME.
* auto-load.c (auto_load_objfile_script): Check also OBJF_NOT_FILENAME.
* jit.c (jit_object_close_impl): Use OBJF_NOT_FILENAME for
allocate_objfile.
(jit_bfd_try_read_symtab): Use OBJF_NOT_FILENAME for
symbol_file_add_from_bfd.
* jv-lang.c (get_dynamics_objfile): Use OBJF_NOT_FILENAME for
allocate_objfile.
* objfiles.c (allocate_objfile): Assert OBJF_NOT_FILENAME if NAME is
NULL.
* objfiles.h (OBJF_NOT_FILENAME): New.
This patch fixes gdb PR symtab/15597.
The bug is that the .gnu_debugaltlink section includes the build-id of
the alt file, but gdb does not use it.
This patch fixes the problem by changing gdb to do what it ought to
always have done: verify the build id of the file found using the
filename in .gnu_debugaltlink; and if that does not match, try to find
the correct debug file using the build-id and debug-file-directory.
This patch touches BFD. Previously, gdb had its own code for parsing
.gnu_debugaltlink; I changed it to use the BFD functions after those
were introduced. However, the BFD functions are incorrect -- they
assume that .gnu_debugaltlink is formatted like .gnu_debuglink.
However, it it is not. Instead, it consists of a file name followed
by the build-id -- no alignment, and the build-id is not a CRC.
Fixing this properly is a bit of a pain. But, because
separate_alt_debug_file_exists just has a FIXME for the build-id case,
I did not fix it properly. Instead I introduced a hack. This leaves
BFD working just as well as it did before my patch.
I'm willing to do something better here but I could use some guidance
as to what. It seems that the build-id code in BFD is largely punted
on.
FWIW gdb is the only user of bfd_get_alt_debug_link_info outside of
BFD itself.
I moved the build-id logic out of elfread.c and into a new file.
This seemed cleanest to me.
Writing a test case was a bit of a pain. I added a couple new
features to the DWARF assembler to handle this.
Built and regtested on x86-64 Fedora 18.
* bfd-in2.h: Rebuild.
* opncls.c (bfd_get_alt_debug_link_info): Add buildid_len
parameter. Change type of buildid_out. Update.
(get_alt_debug_link_info_shim): New function.
(bfd_follow_gnu_debuglink): Use it.
* Makefile.in (SFILES): Add build-id.c.
(HFILES_NO_SRCDIR): Add build-id.h.
* build-id.c: New file, largely from elfread.c. Modified
most functions.
* build-id.h: New file.
* dwarf2read.c (dwarf2_get_dwz_file): Update for change to
bfd_get_alt_debug_link_info. Verify dwz file's build-id.
Search for dwz file using build-id.
* elfread.c (build_id_bfd_get, build_id_verify)
(build_id_to_debug_filename, find_separate_debug_file): Remove.
* gdb.dwarf2/dwzbuildid.exp: New file.
* lib/dwarf.exp (Dwarf::_section): Add "flags" and "type"
parameters.
(Dwarf::_defer_output): Change "section" parameter to
"section_spec"; update.
(Dwarf::gnu_debugaltlink, Dwarf::_note, Dwarf::build_id): New
procs.
Upon trying to print the value of a variant record, a user noticed
the following problem:
(gdb) print rt
warning: Unknown upper bound, using 1.
warning: Unknown upper bound, using 1.
$1 = (a => ((a1 => (4), a2 => (4)), (a1 => (8), a2 => (8))))
The expected output is:
(gdb) print rt
$1 = (a => ((a1 => (4, 4), a2 => (8, 8)), (a1 => (4, 4),
a2 => (8, 8))))
The problems comes from the fact that components "a1" and "a2" are
defined as arrays whose upper bound is dynamic. To determine the value
of that upper bound, GDB relies on the GNAT encoding and searches
for the parallel ___U variable. Unfortunately, the search fails
while doing a binary search inside the partial symtab of the unit
where the array and its bound (and therefore the parallel ___U variable)
are defined.
It fails because partial symbols are sorted using strcmp_iw_ordered,
while Ada symbol lookups are performed using a different comparison
function (ada-lang.c:compare_names). The two functions are supposed
to be compatible, but a change performed in April 2011 modified
strcmp_iw_ordered, introducing case-sensitivity issues. As a result,
the two functions would now disagree when passed the following
two arguments:
string1="common__inner_arr___SIZE_A_UNIT"
string2="common__inner_arr__T4s___U"
The difference starts at "_SIZE_A_UNIT" vs "T4s___U". So, it's mostly
a matter of comparing '_' with 'T'.
On the one hand, strcmp_iw_ordered would return -1, while compare_names
returned 11. The change that made all the difference is that
strcmp_iw_ordered now performs a case-insensitive comparison,
and only resorts to case-sentitive comparison if the first comparison
finds an equality. This changes everything, because while 'T' (84)
and 't' (116) are on opposite sides of '_' (95).
This patch aims at restoring the compatibility between the two
functions, by adding case-sensitivity handling in the Ada comparison
function.
gdb/ChangeLog:
* ada-lang.c (compare_names_with_case): Renamed from
compare_names, adding a new parameter "casing" and its handling.
New function documentation.
(compare_names): New function, implemented using
compare_names_with_case.
This moves the demangled_names_hash from the objfile into the per-BFD
object. This is part of the objfile splitting project.
The demangled names hash is independent of the program space. And, it
is needed by the symbol tables. Both of these things indicate that it
must be pushed into the per-BFD object, which this patch does.
Built and regtested on x86-64 Fedora 18.
* objfiles.c (free_objfile_per_bfd_storage): Delete the
demangled_names_hash.
(free_objfile): Don't delete the demangled_names_hash.
* objfiles.h (struct objfile_per_bfd_storage)
<demangled_names_hash>: New field.
(struct objfile) <demangled_names_hash>: Move to
objfile_per_bfd_storage.
* symfile.c (reread_symbols): Don't delete the
demangled_names_hash.
* symtab.c (create_demangled_names_hash): Update.
(symbol_set_names): Update.
Right now we always share per-BFD data across objfiles, if there is a
BFD. This works fine. However, we're going to start sharing more
data, and sometimes this data will come directly from sections of the
BFD. If such a section has SEC_RELOC set, then the data coming from
that section will not be truly sharable -- the section will be
program-space-dependent, and re-read by gdb for each objfile.
This patch disallows per-BFD sharing in this case. This is a bit
"heavy" in that we could in theory examine each bit of shared data for
suitability. However, that is more complicated, and SEC_RELOC is rare
enough that I think we needn't bother.
Note that the "no sharing" case is equivalent to "gdb works as it
historically did". That is, the sharing is a new(-ish) optimization.
Built and regtested on x86-64 Fedora 18.
* gdb_bfd.c (struct gdb_bfd_data) <relocation_computed,
needs_relocations>: New fields.
(gdb_bfd_requires_relocations): New function.
* gdb_bfd.h (gdb_bfd_requires_relocations): Declare.
* objfiles.c (get_objfile_bfd_data): Disallow sharing if
the BFD needs relocations applied.
It seems "gone" may confuse people, while that was exactly what it was
trying to avoid. Switch to saying "no longer in the thread list",
which is really the predicate GDB uses.
gdb/
2013-10-07 Pedro Alves <palves@redhat.com>
PR breakpoints/11568
* breakpoint.c (remove_threaded_breakpoints): Say "no longer in
the thread list" instead of "gone".
will hold the signal number when the inferior terminates due to the
uncaught signal.
I've made modifications on infrun.c:handle_inferior_event such that
$_exitcode gets cleared when the inferior signalled, and vice-versa.
This assumption was made because the variables are mutually
exclusive, i.e., when the inferior terminates because of an uncaught
signal it is not possible for it to return. I have also made modifications
such that when a corefile is loaded, $_exitsignal gets set to the uncaught
signal that "killed" the inferior, and $_exitcode is cleared.
The patch also adds a NEWS entry, documentation bits, and a testcase. The
documentation entry explains how to use $_exitsignal and $_exitcode in a
GDB script, by making use of the new $_isvoid convenience function.
gdb/
2013-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* NEWS: Mention new convenience variable $_exitsignal.
* corelow.c (core_open): Reset exit convenience variables. Set
$_exitsignal to the uncaught signal which generated the corefile.
* infrun.c (handle_inferior_event): Reset exit convenience
variables. Set $_exitsignal for TARGET_WAITKIND_SIGNALLED.
(clear_exit_convenience_vars): New function.
* inferior.h (clear_exit_convenience_vars): New prototype.
gdb/testsuite/
2013-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.base/corefile.exp: Test whether $_exitsignal is set and
$_exitcode is void when opening a corefile.
* gdb.base/exitsignal.exp: New file.
* gdb.base/segv.c: Likewise.
* gdb.base/normal.c: Likewise.
gdb/doc/
2013-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.texinfo (Convenience Variables): Document $_exitsignal.
Update entry for $_exitcode.
* NEWS: Mention support for DWP file format version 2.
* dwarf2read.c (dwarf2_section_info): Convert asection field to a
union of asection, containing_section. New fields virtual_offset
and is_virtual. Change type of readin filed from int to char.
(dwo_sections, dwo_file): Tweak comments.
(dwp_v2_section_ids): New enum.
(dwp_sections): New fields abbrev, info, line, loc, macinfo, macro,
str_offsets, types.
(virtual_v1_dwo_sections): Renamed from virtual_dwo_sections.
All uses updated.
(virtual_v2_dwo_sections): New struct.
(dwp_hash_table): New fields version, nr_columns. Change type of
section_pool field to a union.
(dwp_file): New field version.
(dwarf2_has_info): Check for virtual sections.
(get_containing_section): New function.
(get_section_bfd_owner, get_section_bfd_section): Call it.
(dwarf2_locate_sections): Update.
(dwarf2_section_empty_p): Update.
(dwarf2_read_section): Handle virtual sections.
(locate_dwz_sections): Update.
(create_dwp_hash_table): Document and handle V2 format.
(locate_v1_virtual_dwo_sections): Renamed from
locate_virtual_dwo_sections and update. All callers updated.
(create_dwo_unit_in_dwp_v1): Renamed from create_dwo_in_dwp.
Delete arg htab. Rename arg section_index to unit_index.
All callers updated.
(MAX_NR_V1_DWO_SECTIONS): Renamed from MAX_NR_DWO_SECTIONS.
All uses updated.
(create_dwp_v2_section, create_dwo_unit_in_dwp_v2): New functions.
(lookup_dwo_unit_in_dwp): Add V2 support.
(dwarf2_locate_dwo_sections): Update.
(dwarf2_locate_common_dwp_sections): Renamed from
dwarf2_locate_dwp_sections and update. All callers updated.
(dwarf2_locate_v2_dwp_sections): New function.
(open_and_init_dwp_file): Add V2 support.
(read_str_index): New locals str_section, str_offsets_section.
The ptid_t contructors, accessors and predicates are documented in
_three_ places, and each place uses a different wording.
E.g, the descriptions in the .c file of the new ptid_lwp_p, ptid_tid_p
weren't updated in the final revision like the descriptions in the .h
file were. Clearly, switching to a style that has a single central
description avoids such issues.
Worse, some of the existing descriptions are plain wrong, such as:
/* Attempt to find and return an existing ptid with the given PID, LWP,
and TID components. If none exists, create a new one and return
that. */
ptid_t ptid_build (int pid, long lwp, long tid);
The function does nothing that complicated. It's just a simple
constructor.
So this gets rid of all the unnecessary descriptions, leaving only the
ones near the function declarations in the header file, and
fixes/clarifies those that remain.
gdb/
2013-10-04 Pedro Alves <palves@redhat.com>
* common/ptid.c (null_ptid, minus_one_ptid, ptid_build)
(pid_to_ptid, ptid_get_pid, ptid_get_lwp, ptid_get_tid)
(ptid_equal, ptid_is_pid, ptid_lwp_p, ptid_tid_p): Replace
describing comments with references to ptid.h.
* common/ptid.h: Remove intro description of constructors,
accessors and predicates.
(struct ptid): Reformat.
(minus_one_ptid, ptid_build, pid_to_ptid, ptid_get_pid)
(ptid_get_lwp, ptid_get_tid, ptid_equal, ptid_is_pid): Change
describing comments.
This patch fixes a small typo after the BUILD_THREAD -> ptid_build
conversion.
gdb/ChangeLog:
* aix-thread.c (sync_threadlists): Add missing ')' in call
to ptid_build.
We're casting "addr" into "addr_ptr", but this variable is actually
a parameter with that very same type...
gdb/ChangeLog:
* aix-thread.c (ptrace32): Remove cast to addr_ptr.
gdb/ChangeLog:
* mi/mi-main.c (run_one_inferior): Add function description.
Make ARG a pointer to an integer whose value determines whether
we should "run" or "start" the program.
(mi_cmd_exec_run): Add handling of the "--start" option.
Reject all other command-line options.
* NEWS: Add entry for "-exec-run"'s new "--start" option.
gdb/doc/ChangeLog:
* gdb.texinfo (GDB/MI Program Execution): Document "-exec-run"'s
new "--start" option.
gdb/testsuite/ChangeLog:
* gdb.mi/mi-start.c, gdb.mi/mi-start.exp: New files.
This patch moves pending_event to remote_notif_state. All pending
events are destroyed in remote_notif_state_xfree. However,
discard_pending_stop_replies release pending event too, so the pending
event of stop notification is released twice, we need some refactor
here. We add a new function discard_pending_stop_replies_in_queue
which only discard events in stop_reply_queue, and let
remote_notif_state_xfree release pending event for all notif_client.
After this change, discard_pending_stop_replies is only attached to
ifnerior_exit observer, so the INF can't be NULL any more. The
NULL checking is removed too.
gdb:
2013-10-04 Yao Qi <yao@codesourcery.com>
* remote-notif.h (REMOTE_NOTIF_ID): New enum.
(struct notif_client) <pending_event>: Moved
to struct remote_notif_state.
<id>: New field.
(struct remote_notif_state) <pending_event>: New field.
(notif_event_xfree): Declare.
* remote-notif.c (handle_notification): Adjust.
(notif_event_xfree): New function.
(do_notif_event_xfree): Call notif_event_xfree.
(remote_notif_state_xfree): Call notif_event_xfree to free
each element in field pending_event.
* remote.c (discard_pending_stop_replies): Remove declaration.
(discard_pending_stop_replies_in_queue): Declare.
(remote_close): Call discard_pending_stop_replies_in_queue
instead of discard_pending_stop_replies.
(remote_start_remote): Adjust.
(stop_reply_xfree): Call notif_event_xfree.
(notif_client_stop): Adjust initialization.
(remote_notif_remove_all): Rename it to ...
(remove_stop_reply_for_inferior): ... this. Update comments.
Don't check INF is NULL.
(discard_pending_stop_replies): Return early if notif_state is
NULL. Adjust. Don't check INF is NULL.
(remote_notif_get_pending_events): Adjust.
(discard_pending_stop_replies_in_queue): New function.
(remote_wait_ns): Likewise.
Hi,
This FIXME goes into my eyes, when I am about to modify something here,
/* Name is allocated by name_of_child. */
/* FIXME: xstrdup should not be here. */
This FIXME was introduced in the python pretty-pretter patches.
Python pretty-printing [6/6]
https://sourceware.org/ml/gdb-patches/2009-05/msg00467.html
create_child_with_value is called in two paths,
1. varobj_list_children -> create_child -> create_child_with_value,
2. install_dynamic_child -> install_dynamic_child -> varobj_add_child
-> create_child_with_value
In path #1, 'name' is allocated by name_of_child, as the original
comment said, we don't have to duplicate NAME in
create_child_with_value. In path #2, 'name' is got from
PyArg_ParseTuple, and we have to duplicate NAME.
This patch removes the call to xstrdup in create_child_with_value
and call xstrudp in update_dynamic_varobj_children (path #2).
gdb:
2013-10-04 Yao Qi <yao@codesourcery.com>
* varobj.c (create_child_with_value): Remove 'const' from the
type of parameter 'name'.
(varobj_add_child): Likewise.
(install_dynamic_child): Remove 'const' from the type of
parameter 'name'.
(varobj_add_child): Likewise.
(create_child_with_value): Likewise. Update comments. Don't
duplicate 'name'.
(update_dynamic_varobj_children): Duplicate 'name'
and pass it to install_dynamic_child.
* python/py-value.c (convert_value_from_python): Move PyInt_Check
conversion logic to occur after PyLong_Check. Comment on order
change significance.
* python/py-arch.c (archpy_disassemble): Comment on order of
conversion for integers and longs.
If enabling PTRACE_O_TRACEFORK fails, we never test for
PTRACE_O_TRACESYSGOOD support. Before PTRACE_O_TRACESYSGOOD is checked,
we have:
/* First, set the PTRACE_O_TRACEFORK option. If this fails, we
know for sure that it is not supported. */
ret = ptrace (PTRACE_SETOPTIONS, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) PTRACE_O_TRACEFORK);
if (ret != 0)
{
ret = ptrace (PTRACE_KILL, child_pid, (PTRACE_TYPE_ARG3) 0,
(PTRACE_TYPE_ARG4) 0);
if (ret != 0)
{
warning (_("linux_check_ptrace_features: failed to kill child"));
return;
}
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
warning (_("linux_check_ptrace_features: failed "
"to wait for killed child"));
else if (!WIFSIGNALED (status))
warning (_("linux_check_ptrace_features: unexpected "
"wait status 0x%x from killed child"), status);
return; <<<<<<<<<<<<<<<<<
}
Note that early return. If PTRACE_O_TRACEFORK isn't supported, we're
not checking PTRACE_O_TRACESYSGOOD. This didn't use to be a problem
before the unification of this whole detection business in
linux-ptrace.c. Before, the sysgood detection was completely
separate:
static void
linux_test_for_tracesysgood (int original_pid)
{
int ret;
sigset_t prev_mask;
/* We don't want those ptrace calls to be interrupted. */
block_child_signals (&prev_mask);
linux_supports_tracesysgood_flag = 0;
ret = ptrace (PTRACE_SETOPTIONS, original_pid, 0, PTRACE_O_TRACESYSGOOD);
if (ret != 0)
goto out;
linux_supports_tracesysgood_flag = 1;
out:
restore_child_signals_mask (&prev_mask);
}
So we need to get back the decoupling somehow. I think it's cleaner
to split the seperate feature detections to separate functions. This
patch does that. The new functions are named for their counterparts
that existed before this code was moved to linux-ptrace.c.
Note I've used forward declarations for the new functions to make the
patch clearer, as otherwise the patch would look like I'd be adding a
bunch of new code. A reorder can be done in a follow up patch.
Tested on x86_64 Fedora 17.
gdb/
2013-10-03 Pedro Alves <palves@redhat.com>
* common/linux-ptrace.c (linux_check_ptrace_features): Factor out
the PTRACE_O_TRACESYSGOOD and PTRACE_O_TRACEFORK to separate
functions. Always test for PTRACE_O_TRACESYSGOOD even if
PTRACE_O_TRACEFORK is not supported.
(linux_test_for_tracesysgood): New function.
(linux_test_for_tracefork): New function, factored out from
linux_check_ptrace_features, and also don't kill child_pid here.
Currently, in some scenarios, GDB prints <optimized out> when printing
outer frame registers. An <optimized out> register is a confusing
concept. What this really means is that the register is
call-clobbered, or IOW, not saved by the callee. This patch makes GDB
say that instead.
Before patch:
(gdb) p/x $rax $1 = <optimized out>
(gdb) info registers rax
rax <optimized out>
After patch:
(gdb) p/x $rax
$1 = <not saved>
(gdb) info registers rax
rax <not saved>
However, if for some reason the debug info describes a variable as
being in such a register (**), we still want to print <optimized out>
when printing the variable. IOW, <not saved> is reserved for
inspecting registers at the machine level. The patch uses
lval_register+optimized_out to encode the not saved registers, and
makes it so that optimized out variables always end up in
!lval_register values.
** See <https://sourceware.org/ml/gdb-patches/2012-08/msg00787.html>.
Current/recent enough GCC doesn't mark variables/arguments as being in
call-clobbered registers in the ranges corresponding to function
calls, while older GCCs did. Newer GCCs will just not say where the
variable is, so GDB will end up realizing the variable is optimized
out.
frame_unwind_got_optimized creates not_lval optimized out registers,
so by default, in most cases, we'll see <optimized out>.
value_of_register is the function eval.c uses for evaluating
OP_REGISTER (again, $pc, etc.), and related bits. It isn't used for
anything else. This function makes sure to return lval_register
values. The patch makes "info registers" and the MI equivalent use it
too. I think it just makes a lot of sense, as this makes it so that
when printing machine registers ($pc, etc.), we go through a central
function.
We're likely to need a different encoding at some point, if/when we
support partially saved registers. Even then, I think
value_of_register will still be the spot to tag the intention to print
machine register values differently.
value_from_register however may also return optimized out
lval_register values, so at a couple places where we're computing a
variable's location from a dwarf expression, we convert the resulting
value away from lval_register to a regular optimized out value.
Tested on x86_64 Fedora 17
gdb/
2013-10-02 Pedro Alves <palves@redhat.com>
* cp-valprint.c (cp_print_value_fields): Adjust calls to
val_print_optimized_out.
* jv-valprint.c (java_print_value_fields): Likewise.
* p-valprint.c (pascal_object_print_value_fields): Likewise.
* dwarf2loc.c (dwarf2_evaluate_loc_desc_full)
<DWARF_VALUE_REGISTER>: If the register was not saved, return a
new optimized out value.
* findvar.c (address_from_register): Likewise.
* frame.c (put_frame_register): Tweak error string to say the
register was not saved, rather than optimized out.
* infcmd.c (default_print_one_register_info): Adjust call to
val_print_optimized_out. Use value_of_register instead of
get_frame_register_value.
* mi/mi-main.c (output_register): Use value_of_register instead of
get_frame_register_value.
* valprint.c (valprint_check_validity): Likewise.
(val_print_optimized_out): New value parameter. If the value is
lval_register, print <not saved> instead.
(value_check_printable, val_print_scalar_formatted): Adjust calls
to val_print_optimized_out.
* valprint.h (val_print_optimized_out): New value parameter.
* value.c (struct value) <optimized_out>: Extend comment.
(error_value_optimized_out): New function.
(require_not_optimized_out): Use it. Use a different string for
lval_register values.
* value.h (error_value_optimized_out): New declaration.
* NEWS: Mention <not saved>.
gdb/testsuite/
2013-10-02 Pedro Alves <palves@redhat.com>
* gdb.dwarf2/dw2-reg-undefined.exp <pattern_rax_rbx_rcx_print,
pattern_rax_rbx_rcx_info>: Set to "<not saved>".
* gdb.mi/mi-reg-undefined.exp (opt_out_pattern): Delete.
(not_saved_pattern): New.
Replace use of the former with the latter.
gdb/doc/
2013-10-02 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Registers): Expand description of saved registers
in frames. Explain <not saved>.
This avoids duplicating the logic comparing two symbol_search
objects (in search_symbols_equal and compare_search_syms).
gdb/ChangeLog:
* symtab.c (search_symbols_equal): Delete.
(sort_search_symbols_remove_dups): Replace call to
search_symbols_equal by call to compare_search_syms,
adjusting as necessary.
* arm-wince-tdep.c: Remove inclusion of "solib.h" and
"solib-target.h". Include "windows-tdep.h".
(arm_wince_init_abi): Call windows_init_abi. Remove call to
set_solib_ops and set_gdbarch_has_dos_based_file_system.
* configure.tgt (arm*-wince-pe | arm*-*-mingw32ce*): Append
windows-tdep.o to gdb_target_obs.
* amd64-windows-tdep.c: Remove inclusion of "solib.h" and
"solib-target.h".
(amd64_windows_init_abi): Don't call set_solib_ops and
set_gdbarch_iterate_over_objfiles_in_search_order. Call
windows_init_abi instead.
* i386-cygwin-tdep.c: Remove inclusion of "solib.h" and
"solib-target.h".
(i386_cygwin_init_abi): Don't call set_solib_ops,
set_gdbarch_has_dos_based_file_system and
set_gdbarch_iterate_over_objfiles_in_search_order. Call
windows_init_abi instead.
* windows-tdep.c: Include "solib.h" and "solib-target.h".
(windows_init_abi): New function.
(windows_iterate_over_objfiles_in_search_order): Make it
static.
* windows-tdep.h (windows_init_abi): Declare.
(windows_iterate_over_objfiles_in_search_order): Remove
declaration.
So far elinos.py was assuming that the whole ELinOS environment was
around to find the system libraries; if some environment variables
were missing, the script would just abort.
This was a bit extreme. It is possible to do better than that: to get
the core system libraries, one doesn't need to have a full environment
but just the path to the CDK. The path to kernel project is only
needed for the optional Xenomai libs.
gdb/ChangeLog:
* system-gdbinit/elinos.py (get_elinos_environment): Return an
incomplete dictionnary instead of None in case of missing
environment variables.
(elinos_init): in case of an incomplete environment, best
effort to load system libraries instead of abort.
When building the program with the shared GNAT runtime, the debugger
is unable to insert Ada exception catchpoints until that runtime
has been mapped to memory. In other words, we expect the user to start
the program first, before attempting to insert that catchpoint.
The detection mechanism that tries to provide some useful tips to
the user fails when the program itself contains a trampoline symbol
matching the symbol that the catchpoint is trying to use. This
results in the following error message:
(gdb) catch exception
Your Ada runtime appears to be missing some debugging information.
Cannot insert Ada exception catchpoint in this configuration.
Instead, we expected the following error message:
(gdb) catch exception
Unable to insert catchpoint. Try to start the program first.
gdb/ChangeLog:
* ada-lang.c (ada_has_this_exception_support): Ignore
mst_solib_trampoline minimal symbols.
* i386-darwin-nat.c (darwin_complete_target): Install methods for
hardware watchpoint.
(i386_darwin_dr_set): Support 32 and 64 bit states.
(i386_darwin_dr_get): Likewise.
(i386_darwin_dr_set_control): Make static.
(i386_darwin_dr_set_addr, i386_darwin_dr_get_addr)
(i386_darwin_dr_get_status, i386_darwin_dr_get_control): Likewise.
It is possible to have a build of glibc where SYS_perf_event_open is not
defined (because when the glibc was compiled, the syscall did not exist),
but have newer kernel headers installed so that linux/perf_event.h is
available. In this setup, you get a build failure:
./common/linux-btrace.c: In function 'kernel_supports_btrace':
./common/linux-btrace.c:316:23: error: 'SYS_perf_event_open' undeclared (first use in this function)
Update the ifdef check to also see if the syscall is available.
URL: https://bugs.gentoo.org/473522
Reported-by: William Throwe <wtt6@cornell.edu>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
(dwp_file): Split loaded_cutus into loaded_cus, loaded_tus.
All uses updated.
(dwarf2_section_empty_p): Rename arg from "info" to "section".
(dwarf2_read_section): Delete unused local "header". Add section
name to error message.
(create_dwo_in_dwp): Tweak comment.
(MAX_NR_DWO_SECTIONS): Combine count of .debug_macro + .debug_macinfo.
(get_section_bfd_owner, get_section_bfd_section): New functions.
(get_section_name, get_section_file_name): New functions.
(get_section_id, get_section_flags): New functions.
(*): Use new functions to access section fields.
(lookup_dwo_unit_in_dwp): Renamed from lookup_dwo_in_dwp. Remove
arg "htab". All callers updated.
(create_debug_types_hash_table): Remove redundant copy of
abbrev_section.
(create_dwo_in_dwp): Tweak comments.
(read_str_index): Tweak comment. Record dwarf form name in static
local.
I tried debugging a remote Windows program on Linux host, and pointed the
sysroot to "/some/path/" rather than "remote:", and I found GDB couldn't
find the dlls in the sysroot. If the dll name is
"C:/Windows/system32/ntdll.dll", I end up with the sysroot+in_pathname
concatenated this way:
(top-gdb) p temp_pathname
$1 = 0x228b690 "/some/pathC:/Windows/system32/ntdll.dll"
^^
That is, a directory separator is missing. This is a regression.
The problem is that solib_find decides that since the target path has
a drive spec, a separator is not necessary, which is clearly wrong in
this case. That check was added in
<https://sourceware.org/ml/gdb-patches/2013-06/msg00028.html>, to
handle the case of sysroot being "remote:". This patch fixes that
original issue in a different way. Instead of checking whether the
path has a drive spec, check whether the sysroot is "remote:". The
patch adds a table that helps visualize the cases that need a
separator. I also confirmed the original issue is still handled as
expected. That is, that "set sysroot remote:" still does the right
thing.
remote_filename_p returns true if the filename is prefixed with
"remote:". In this case, we need to check whether the filename is
exactly "remote:". I thought of different ways or either changing
remote_filename_p or adding another convenience function to remote.c
to avoid exposing the "remote:" prefix out of remote.c. But all
attempts turned out adding lot of over needless complication. So the
patch just exposes the prefix behind a new macro, which allows using a
straighforward strcmp.
gdb/
2013-09-27 Pedro Alves <palves@redhat.com>
* remote.h (REMOTE_SYSROOT_PREFIX): New define.
(remote_filename_p): Add comment.
* remote.c (remote_filename_p): Adjust to use
REMOTE_SYSROOT_PREFIX.
* solib.c (solib_find): When deciding whether we need to add a
directory separator, check whether the sysroot is "remote:"
instead of checking whether the patch has a drive spec. Add
comments.
I noticed these fields aren't really necessary -- if the T stop reply
indicated any we have any special event, the fallthrough doesn't
really do anything.
Tested on x86_64 Fedora 17 w/ local gdbserver, and also confirmed
"catch load" against a Windows gdbserver running under Wine, which
exercises TARGET_WAITKIND_LOADED, still works as expected.
gdb/
2013-09-27 Pedro Alves <palves@redhat.com>
* remote.c (struct stop_reply) <solibs_changed, replay_event>:
Delete fields.
(remote_parse_stop_reply): Adjust, setting event->ws.kind
directly.
AMD64_R15_REGNUM when a register index is expected.
* amd64-windows-tdep.c (amd64_windows_dummy_call_integer_regs):
Substitute in array.
* amd64-tdep.c (amd64_dwarf_regmap): Ditto.
(amd64_push_arguments): Substitute in integer_regnum array.
* NEWS: Mention "set debug symfile".
* Makefile.in (SFILES): Add symfile-debug.c.
(COMMON_OBS): Add symfile-debug.o.
* elfread.c (elf_symfile_read): Use objfile_set_sym_fns to set the
objfile's symbol functions.
* objfiles.h (objfile_set_sym_fns): Declare.
* symfile-debug.c: New file.
* symfile.c (syms_from_objfile_1): Use objfile_set_sym_fns to set the
objfile's symbol functions.
(reread_symbols): Ditto.
All uses updated.
(add_symtab_fns): Update prototype.
* symfile.c (sym_fns_ptr): Delete. Replace with ...
(registered_sym_fns): ... this.
(symtab_fns): Update.
(add_symtab_fns): New arg "flavour". All callers updated.
(find_sym_fns): Rewrite to use new sym_fns registry.
2013-09-25 Andreas Arnez <arnez@linux.vnet.ibm.com>
PR shlibs/8882
* solib-svr4.c (svr4_read_so_list): Skip the vDSO when reading
link map entries.
testsuite/ChangeLog:
2013-09-25 Andreas Arnez <arnez@linux.vnet.ibm.com>
PR shlibs/8882
* gdb.base/corefile.exp: Add a check to assure warning-free
core-file load.
This is no longer useful, as it was introduced to reuse the funcall
handling code in amd64-tdep.c in the context of x64-windows. But
we have since then changed the implementations to be completely
independent of each other.
This reverts the non-windows-specific part of the change called:
amd64: Integer parameters in function calls on Windows
(the x64-windows portion has already been reverted)
gdb/ChangeLog:
Revert:
* i386-tdep.h (enum amd64_reg_class): New, moved here from
amd64-tdep.c.
(struct gdbarch_tdep): Add fields call_dummy_num_integer_regs,
call_dummy_integer_regs, and classify.
* amd64-tdep.h (amd64_classify): Add declaration.
* amd64-tdep.c (amd64_dummy_call_integer_regs): New static constant.
(amd64_reg_class): Delete, moved to i386-tdep.h.
(amd64_classify): Make non-static. Move declaration to amd64-tdep.h.
Replace call to amd64_classify by call to tdep->classify.
(amd64_push_arguments): Get the list of registers to use for
passing integer parameters from the gdbarch tdep structure,
rather than using a hardcoded one. Replace calls to amd64_classify
by calls to tdep->classify.
(amd64_push_dummy_call): Get the register number used for
the "hidden" argument from tdep->call_dummy_integer_regs.
(amd64_init_abi): Initialize tdep->call_dummy_num_integer_regs
and tdep->call_dummy_integer_regs. Set tdep->classify.
This is no longer useful, as it was introduced to reuse the funcall
handling code in amd64-tdep.c in the context of x64-windows. But
we have since then changed the implementations to be completely
independent of each other.
This reverts the non-windows-specific part of the change called:
amd64-windows: memory args passed by pointer during function calls.
(the x64-windows portion has already been reverted)
gdb/ChangeLog:
Revert:
* i386-tdep.h (gdbarch_tdep): Add field memory_args_by_pointer.
* amd64-tdep.c (amd64_push_arguments): Add handling of architectures
where tdep->memory_args_by_pointer is non-zero.
This is no longer useful, as it was introduced to reuse the funcall
handling code in amd64-tdep.c in the context of x64-windows. But
we have since then changed the implementations to be completely
independent of each other.
This reverts the non-windows-specific part of the change called:
amd64-windows: 32 bytes allocated on stack by caller for integer
parameter regs
(the x64-windows portion has already been reverted)
gdb/ChangeLog:
Revert:
* i386-tdep.h (struct gdbarch_tdep): Add new field
integer_param_regs_saved_in_caller_frame.
* amd64-tdep.c (amd64_push_dummy_call): Allocate some memory on
stack if tdep->integer_param_regs_saved_in_caller_frame is set.
This patch provides a standalone implementation of function calls
on amd64-windows, instead of providing some bits and pieces hooking
into the function call implementation meant for sysV (in amd64-tdep).
It makes better sense to do it this way, because the two ABIs are
actually very different; for instance, the concept of argument
classification, which is so central in the sysV ABI and drove the
the implementation in amd64-tdep, makes no sense for Windows. It
is therefore better for the Windows implementation to be completely
separate, rather than rely on adaptations of the sysV implementation.
gdb/ChangeLog:
* amd64-tdep.c: #include "value.h"
(amd64_windows_classify): Delete.
(amd64_windows_passed_by_integer_register)
(amd64_windows_passed_by_xmm_register)
(amd64_windows_passed_by_pointer)
(amd64_windows_adjust_args_passed_by_pointer)
(amd64_windows_store_arg_in_reg, amd64_windows_push_arguments)
(amd64_windows_push_dummy_call): New functions.
(amd64_windows_init_abi): Remove setting of
tdep->call_dummy_num_integer_regs, tdep->call_dummy_integer_regs,
tdep->classify, tdep->memory_args_by_pointer and
tdep->integer_param_regs_saved_in_caller_frame.
Add call to set_gdbarch_push_dummy_call.
gdb/
2013-09-24 Jan Kratochvil <jan.kratochvil@redhat.com>
* dwarf2read.c (open_and_init_dwp_file): Try open_dwp_file also with
objfile->original_name.
gdb/testsuite/
2013-09-24 Jan Kratochvil <jan.kratochvil@redhat.com>
* gdb.dwarf2/dwp-symlink.c: New file.
* gdb.dwarf2/dwp-symlink.exp: New file.
gdb/
2013-09-24 Jan Kratochvil <jan.kratochvil@redhat.com>
Pass down original filename for objfile.
* coffread.c (coff_symfile_read): Update symbol_file_add_separate call.
* elfread.c (elf_symfile_read): Likewise.
* jit.c (jit_object_close_impl): Update allocate_objfile call, no
longer set ORIGINAL_NAME.
(jit_bfd_try_read_symtab): Update symbol_file_add_from_bfd call.
* jv-lang.c (get_dynamics_objfile): Update allocate_objfile call.
* machoread.c (macho_add_oso_symfile): Add parameter name. Update
symbol_file_add_from_bfd call.
(macho_symfile_read_all_oso): Update two macho_add_oso_symfile calls.
(macho_check_dsym): Add parameter filenamep. Change function comment.
Set *filenamep.
(macho_symfile_read): New variable dsym_filename. Update
macho_check_dsym call. Use it for symbol_file_add_separate.
* objfiles.c (allocate_objfile): Add parameter name. New comment for
it. Use it for objfile->original_name.
(objfile_name): Return OBFD's filename, if available.
* objfiles.h (allocate_objfile): Add new parameter name.
* solib.c (solib_read_symbols): Update symbol_file_add_from_bfd call.
* symfile-mem.c (symbol_file_add_from_memory): Update
symbol_file_add_from_bfd call.
* symfile.c (read_symbols): Update symbol_file_add_separate call, new
comment for it.
(symbol_file_add_with_addrs): New parameter name, add function comment
for it. Remove variable name. Update allocate_objfile call.
(symbol_file_add_separate): New parameter name, add function comment
for it. Update symbol_file_add_with_addrs call.
(symbol_file_add_from_bfd): New parameter name. Update
symbol_file_add_with_addrs call.
(symbol_file_add): Update symbol_file_add_from_bfd call.
(reread_symbols): New variable original_name. Save
objfile->original_name by it.
* symfile.h (symbol_file_add_from_bfd, symbol_file_add_separate): Add
second parameter.
The recent change to make GDB auto-delete thread-specific breakpoints
when the corresponding thread is deleted
(https://sourceware.org/ml/gdb-patches/2013-09/msg00038.html) caused
gdb.base/nextoverexit.exp to regress.
Breakpoint 1, main () at .../gdb/testsuite/gdb.base/nextoverexit.c:21
21 exit (0);
(gdb) next
[Inferior 1 (process 25208) exited normally]
Thread-specific breakpoint -5 deleted - thread 1 is gone.
Thread-specific breakpoint -6 deleted - thread 1 is gone.
Thread-specific breakpoint -7 deleted - thread 1 is gone.
Thread-specific breakpoint 0 deleted - thread 1 is gone.
(gdb) FAIL: gdb.base/nextoverexit.exp: next over exit (the program exited)
We shouldn't be seeing this for internal or momentary breakpoints. In
fact, we shouldn't even be trying to delete them, as whatever created
them will take care or it, and therefore it's dangerous to delete them
behind the creator's back.
I thought it'd still be good to tag thread-specific internal/momentary
breakpoints such that we'll no longer try to keep them insert in the
target, as they'll cause stops and thread hops in other threads, so I
tried disabling them instead. That caused a problem when following a
child fork, and detaching from the parent, as we try to reset the
step-resume etc. breakpoints to the new child's thread
(breakpoint_re_set_thread), after the parent thread is already gone
(and the breakpoints are marked disabled). I fixed that by
re-enabling internal/momentary breakpoints there, but, that didn't
feel super safe either (maybe we'd need a new flag in struct
breakpoint instead, to tag the thread-specific breakpoint as "not to
be inserted"). It felt like I was heading down a design rat hole,
and, other things will usually delete internal/momentary breakpoints
soon enough, so I left that little optimization for some other day.
So, internal/momentary breakpoints are no longer deleted/disabled at
all, and we end up with a one-liner fix.
Tested on x86_64 Fedora 17.
gdb/
2013-09-19 Pedro Alves <palves@redhat.com>
* breakpoint.c (remove_threaded_breakpoints): Skip non-user
breakpoints.
This removes another instance of a deprecated_xfer_memory user.
gdb/
2013-09-19 Pedro Alves <palves@redhat.com>
Thomas Schwinge <thomas@codesourcery.com>
Yue Lu <hacklu.newborn@gmail.com>
* gnu-nat.c (gnu_read_inferior, gnu_write_inferior): Make static.
Take a gdb_byte pointer instead of a char pointer.
* gnu-nat.c (gnu_xfer_memory): Adjust interface as
gnu_xfer_partial helper.
(gnu_xfer_partial): New function.
(gnu_target): Don't install a deprecated_xfer_memory hook.
Install a to_xfer_partial hook.
gdb/
2013-09-19 Jan Kratochvil <jan.kratochvil@redhat.com>
Constification.
* main.c (captured_main): Replace catch_command_errors by
catch_command_errors_const. Twice.
* symfile.c (symbol_file_add_main_1): Make args parameter const.
(symbol_file_add): Make name parameter const.
(symbol_file_add_main, symbol_file_add_main_1): Make args parameter const.
(symfile_bfd_open): Make name parameter const, rename it to cname. Add
variable name. Change their usage accordingly.
* symfile.h (symbol_file_add, symfile_bfd_open): Make first parameter
const.
(symbol_file_add_main): Make args parameter const.
Ulrich Weigand <uweigand@de.ibm.com>
* xcoffread.c (struct coff_symbol): Use CORE_ADDR as type
of c_value member.
(read_xcoff_symtab): Use CORE_ADDR as type of fcn_start_addr.
2013-09-18 Pedro Alves <palves@redhat.com>
Yue Lu <hacklu.newborn@gmail.com>
* gnu-nat.c (inf_validate_procs, gnu_wait, gnu_resume)
(gnu_create_inferior)
(gnu_attach, gnu_thread_alive, gnu_pid_to_str, cur_thread)
(set_sig_thread_cmd): Use the lwpid field of ptids to
store/extract thread ids instead of the tid field.
* i386gnu-nat.c (gnu_fetch_registers): Adjust.
instead of ptid_t.tid.
In preparation for reusing gnu-nat.c in gdbserver, switch to storing
thread ids in the lwpid field of ptid_t rather than in the tid
field. The Hurd's thread model is 1:1, so it doesn't feel wrong
anyway.
gdb/
2013-09-18 Pedro Alves <palves@redhat.com>
* gnu-nat.c (inf_validate_procs, gnu_wait, gnu_resume)
(gnu_create_inferior)
(gnu_attach, gnu_thread_alive, gnu_pid_to_str, cur_thread)
(set_sig_thread_cmd): Use the lwpid field of ptids to
store/extract thread ids instead of the tid field.
* i386gnu-nat.c (gnu_fetch_registers): Adjust.
https://sourceware.org/ml/gdb-patches/2013-08/msg00170.html
gdb/ChangeLog
* infcmd.c (default_print_one_register_info): Add detection of
optimized out values.
(default_print_registers_info): Switch to using
get_frame_register_value.
gdb/testsuite/ChangeLog
* gdb.dwarf2/dw2-reg-undefined.exp: Change pattern for info
register to "<optimized out>", and also print the registers.
By inspection, I noticed that when I made the gnu-nat use
ptid(pid,0,tid) to represent a thread, instead of using ptid(tid,0,0),
in <https://sourceware.org/ml/gdb-patches/2008-08/msg00175.html>, I
introduced a bug.
The change was:
else
{
- int tid = PIDGET (thread_id_to_pid (atoi (args)));
+ int tid = ptid_get_tid (thread_id_to_pid (atoi (args)));
if (tid < 0)
error (_("Thread ID %s not known. Use the \"info threads\" command to\n"
"see the IDs of currently known threads."), args);
and thread_id_to_pid does:
ptid_t
thread_id_to_pid (int num)
{
struct thread_info *thread = find_thread_id (num);
if (thread)
return thread->ptid;
else
return pid_to_ptid (-1);
}
(pid_to_ptid (-1) is the same as minus_one_ptid.)
So before, we were really looking at the pid, where thread_id_to_pid
stores the -1.
The right fix is to compare the whole ptid to minus_one_ptid, of
course.
Completely untested, but I think it's obvious enough, so I went ahead
and put it in.
gdb/
2013-09-18 Pedro Alves <palves@redhat.com>
* gnu-nat.c (set_sig_thread_cmd): Compare the thread's ptid to
minus_one_ptid instead of looking at the ptid's tid field and
comparing that to -1.
PR gdb/11568 is about thread-specific breakpoints being left behind
when the corresponding thread exits.
Currently:
(gdb) b start thread 2
Breakpoint 3 at 0x400614: file thread-specific-bp.c, line 23.
(gdb) b end
Breakpoint 4 at 0x40061f: file thread-specific-bp.c, line 29.
(gdb) c
Continuing.
[Thread 0x7ffff7fcb700 (LWP 14925) exited]
[Switching to Thread 0x7ffff7fcc740 (LWP 14921)]
Breakpoint 4, end () at thread-specific-bp.c:29
29 }
(gdb) info threads
Id Target Id Frame
* 1 Thread 0x7ffff7fcc740 (LWP 14921) "thread-specific" end () at thread-specific-bp.c:29
(gdb) info breakpoints
Num Type Disp Enb Address What
2 breakpoint keep y 0x0000000000400614 in start at thread-specific-bp.c:23
breakpoint already hit 1 time
3 breakpoint keep y 0x0000000000400614 in start at thread-specific-bp.c:23 thread 2
stop only in thread 2
4 breakpoint keep y 0x000000000040061f in end at thread-specific-bp.c:29
breakpoint already hit 1 time
Note that the thread-specific breakpoint 3 stayed around, even though
thread 2 is gone.
There's no way that breakpoint can trigger again (*), so the PR argues
that the breakpoint should just be removed, like local watchpoints.
I'm ambivalent on this -- it could be reasonable to disable the
breakpoint (kind of like breakpoint in shared library code when the
DSO is unloaded), so the user could still use it as visual template
for creating other breakpoints (copy/paste command lists, etc.), or we
could have a way to change to which thread a breakpoint applies. But,
several people pushed this direction, and I don't plan on arguing...
(*) - actually, there is ... thread numbers are reset on "run", so
the user could do "break foo thread 2", "run", and expect the
breakpoint to hit again on the second thread. But given gdb's thread
numbering can't really be stable, that'd only work sufficiently well
for thread 1, so we'd better call it unsupported.
So with the patch, whenever a thread is deleted from GDB's list, GDB
goes through the thread-specific breakpoints and deletes corresponding
breakpoints. Since this is user-visible, GDB prints out:
Thread-specific breakpoint 3 deleted - thread 2 is gone.
And of course, we end up with:
(gdb) info breakpoints
Num Type Disp Enb Address What
2 breakpoint keep y 0x0000000000400614 in start at thread-specific-bp.c:23
breakpoint already hit 1 time
4 breakpoint keep y 0x000000000040061f in end at thread-specific-bp.c:29
breakpoint already hit 1 time
2013-09-17 Muhammad Waqas <mwaqas@codesourcery.com>
Pedro Alves <palves@redhat.com>
PR gdb/11568
* breakpoint.c (remove_threaded_breakpoints): New function.
(_initialize_breakpoint): Attach remove_threaded_breakpoints
as thread_exit observer.
2013-09-17 Muhammad Waqas <mwaqas@codesourccery.com>
Jan Kratochvil <jan.kartochvil@redhat.com>
Pedro Alves <palves@redhat.com>
PR gdb/11568
* gdb.thread/thread-specific-bp.c: New file.
* gdb.thread/thread-specific-bp.exp: New file.
"info threads" changes the default source for "break" and "list", to
whatever the location of the first/bottom thread in the thread list
is...
(gdb) b start
(gdb) c
...
(gdb) list
*lists "start"*
(gdb) b 23
Breakpoint 3 at 0x400614: file test.c, line 23.
(gdb) info threads
Id Target Id Frame
* 2 Thread 0x7ffff7fcb700 (LWP 1760) "test" start (arg=0x0) at test.c:23
1 Thread 0x7ffff7fcc740 (LWP 1748) "test" 0x000000323dc08e60 in pthread_join (threadid=140737353922304, thread_return=0x0) at pthread_join.c:93
(gdb) b 23
Breakpoint 4 at 0x323dc08d90: file pthread_join.c, line 23.
^^^^^^^^^^^^^^^
(gdb) list
93 lll_wait_tid (pd->tid);
94
95
96 /* Restore cancellation mode. */
97 CANCEL_RESET (oldtype);
98
99 /* Remove the handler. */
100 pthread_cleanup_pop (0);
101
102
The issue is that print_stack_frame always sets the current sal to the
frame's sal. print_frame_info (which print_stack_frame calls to do
most of the work) also sets the last displayed sal, but only if
print_what isn't LOCATION. Now the call in question, from within
thread.c:print_thread_info, does pass in LOCATION as print_what, but
print_stack_frame doesn't have the same check print_frame_info has.
We could consider adding it, but setting these globals depending on
print_what isn't very clean, IMO. What we have is two logically
distinct operations mixed in the same function(s):
#1 - print frame, in the format specified by {print_what,
print_level and print_args}.
#2 - We're displaying a frame to the user, and I want the default
sal to point here, because the program stopped here, or the user
did some context-changing command (up, down, etc.).
So I added a new parameter to print_stack_frame & friends for point
#2, and went through all calls in the tree adjusting as necessary.
Tested on x86_64 Fedora 17.
gdb/
2013-09-17 Pedro Alves <palves@redhat.com>
PR gdb/15911
* ada-tasks.c (task_command_1): Adjust call to print_stack_frame.
* bsd-kvm.c (bsd_kvm_open, bsd_kvm_proc_cmd, bsd_kvm_pcb_cmd):
* corelow.c (core_open):
* frame.h (print_stack_frame, print_frame_info): New
'set_current_sal' parameter.
* infcmd.c (finish_command, kill_command): Adjust call to
print_stack_frame.
* inferior.c (inferior_command): Likewise.
* infrun.c (normal_stop): Likewise.
* linux-fork.c (linux_fork_context): Likewise.
* record-full.c (record_full_goto_entry, record_full_restore):
Likewise.
* remote-mips.c (common_open): Likewise.
* stack.c (print_stack_frame): New 'set_current_sal' parameter.
Use it.
(print_frame_info): New 'set_current_sal' parameter. Set the last
displayed sal depending on the new paremeter instead of looking at
print_what.
(backtrace_command_1, select_and_print_frame, frame_command)
(current_frame_command, up_command, down_command): Adjust call to
print_stack_frame.
* thread.c (print_thread_info, restore_selected_frame)
(do_captured_thread_select): Adjust call to print_stack_frame.
* tracepoint.c (tfind_1): Likewise.
* mi/mi-cmd-stack.c (mi_cmd_stack_list_frames)
(mi_cmd_stack_info_frame): Likewise.
* mi/mi-interp.c (mi_on_normal_stop): Likewise.
* mi/mi-main.c (mi_cmd_exec_return, mi_cmd_trace_find): Likewise.
gdb/testsuite/
* gdb.threads/info-threads-cur-sal-2.c: New file.
* gdb.threads/info-threads-cur-sal.c: New file.
* gdb.threads/info-threads-cur-sal.exp: New file.
"You should provide one parameter..." while it should be saying "... one
argument...". Replaced.
2013-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
* value.c (isvoid_internal_fn): Replace "parameter" with
"argument".
<https://sourceware.org/ml/gdb-patches/2013-09/msg00301.html>
<https://sourceware.org/ml/gdb-patches/2013-09/msg00383.html>
This patch adds a new convenience function called $_isvoid, whose
only purpose is to check whether an expression is void or not.
This became necessary because the new convenience variable
$_exitsignal (not yet approved) has a mutual exclusive behavior
with $_exitcode, i.e., when one is "defined" (i.e., non-void),
the other is cleared (i.e., becomes void). Doug wanted a way to
identify which variable to use, and checking for voidness is the
obvious solution.
It is worth mentioning that my first attempt, after a conversation with
Doug, was to actually implement a new $_isdefined() convenience
function. I would do that (for convenience variables) by calling
lookup_only_internalvar. However, I found a few problems:
- Whenever I called $_isdefined ($variable), $variable became defined
(with a void value), and $_isdefined always returned true.
- Then, I tried to implement $_isdefined ("variable"), and do the "$" +
"variable" inside GDB, thus making it impossible for GDB to create the
convenience variable. However, it was hard to extract the string
without having to mess with values and their idiossincrasies.
Therefore, I decided to abandon this attempt (specially because I
didn't want to spend too much time struggling with it).
Anyway, after talking to Doug again we decided that it would be easier
to implement $_isvoid, and this will probably help in cases like
<http://stackoverflow.com/questions/3744554/testing-if-a-gdb-convenience-variable-is-defined>.
I wrote a NEWS entry for it, and some new lines on the documentation.
gdb/
2013-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
* NEWS: Mention new convenience function $_isvoid.
* value.c (isvoid_internal_fn): New function.
(_initialize_values): Add new convenience function $_isvoid.
gdb/doc/
2013-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.texinfo (Convenience Functions): Mention new convenience
function $_isvoid.
gdb/testsuite/
2013-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.base/gdbvars.c (foo_void): New function.
(foo_int): Likewise.
* gdb.base/gdbvars.exp (test_convenience_functions): New
function. Call it.
Remove AT_HWCAP macro definintion as it is provided in
added include file.
* s390-tdep.c: Remove system header <elf.h>
Add "elf/common.h" header for AT_HWCAP definition.
(s390_core_read_description): Use correct CORE_ADDR
for hwcap local variable used as third parameter
of function target_auxv_search.
gdb/
2013-09-13 Jan Kratochvil <jan.kratochvil@redhat.com>
Code cleanup.
* symfile.c (reread_symbols): Move variable obfd_filename to a more
inner block.
Tested by building for --target=arm-eabi, and playing with the debug
output a bit.
gdb/
2013-09-06 Pedro Alves <palves@redhat.com>
* remote-sim.c (dump_mem, gdbsim_fetch_register)
(gdbsim_store_register, gdbsim_kill, gdbsim_load)
(gdbsim_create_inferior, gdbsim_open, gdbsim_close)
(gdbsim_detach, gdbsim_resume_inferior, gdbsim_wait)
(gdbsim_files_info, gdbsim_mourn_inferior): Send debug output to
gdb_stdlog.
This brings in some standard functionality hitherdo missing from
the CRIS/CRISv32 port thanks to the new call to gdbarch_init_osabi,
as well as clearly showing that there is Linux support for this
platform by virtue of the existence of a cris-linux-tdep.c file.
2013-09-06 Ricard Wanderlof <ricardw@axis.com>
* Makefile.in (ALL_TARGET_OBS): Add cris-linux-tdep.o.
* configure.tgt: Add cris-linux-tdep.o and linux-tdep.o to
gdb_target_obs for cris target.
* cris-tdep.c (struct gdbarch_tdep): Move to cris-tdep.h.
(cris_gdbarch_init): Move calls to
set_gdbarch_fetch_tls_load_module_address and
set_solib_svr4_fetch_link_map_offsets to cris-linux-tdep.c.
Add call to gdbarch_init_osabi.
* cris-linux-tdep.c: New file.
* cris-tdep.h: New file.
https://sourceware.org/ml/gdb-patches/2013-09/msg00179.html
gdb/ChangeLog
* cli/cli-interp.c (_initialize_cli_interp): Add a
command_loop_proc to interp_procs.
* event-top.c (cli_command_loop): Change signature to match
interp_command_loop_ftype.
* event-top.h (cli_command_loop): Same.
* interps.c (interp_new): Require every interpreter to have a
command_loop_proc.
(current_interp_command_loop): Just call the command_loop_proc on
the current interpreter.
* tui/tui-interp.c (_initialize_tui_interp): Add a
command_loop_proc to interp_procs.
A couple years ago, dwarf_expr_fetch used to return a CORE_ADDR. It
was made to return a ULONGEST since, and the 'dwarf_regnum' local
adjusted accordingly, but, we kept printing it with paddress.
gdbarch_dwarf2_reg_to_regnum takes the register number as 'int', so
there's really no point in using ULONGEST/pulongest either.
gdb/
2013-09-05 Pedro Alves <palves@redhat.com>
* dwarf2loc.c (dwarf2_evaluate_loc_desc_full): 'dwarf_regnum'
local is now int instead of ULONGEST. Print it with %d
instead of paddress.
I noticed that value_of_register (used for getting values _of_
registers ($pc, $rax, etc.), rather than variables _in_ registers),
kind of builds a franken-value, by propagating the lval and address of
the frame register value, but not the entire location, like necessary
for lval_computed (if some unwinder ever returns that, the resulting
value will misbehave). This gets in the way of printing optimized out
(not saved) lval_registers differently from other optimized out
values, as it doesn't make sure the resulting value is lval_register.
I started out by just doing something like:
- VALUE_LVAL (reg_val) = lval;
- set_value_address (reg_val, addr);
+ VALUE_LVAL (reg_val) = lval_register;
... just like value_of_register_lazy below. That's sufficient to fix
the issue.
Then I noticed this is using frame_register, which we should avoid
nowadays, for it returns elements of a value, but not all that's
sometimes necessary (unavailable-ness is all or nothing with it, for
instance), and considered using get_frame_register_value instead
(which returns a struct value), and value_contents_copy, just like
value_fetch_lazy's handling of lval_register. But at that point, I
realized we might as well just defer all that work to
value_of_register_lazy/value_fetch_lazy...
Doing it this way adds a frame_find_by_id lookup (from within
value_fetch_lazy), while we already have a frame pointer handy in
value_of_register. I considered factoring out the lazy register
fetching out of value_fetch_lazy, into a function that takes a frame
pointer and call that instead, avoiding the lookup, but then it looked
like too much complication for an early optimization, and went back to
keeping it simple.
Tested on x86_64 Fedora 17.
gdb/
2013-09-05 Pedro Alves <palves@redhat.com>
* findvar.c (value_of_register): Rework in terms of
value_of_register_lazy.
I stumbled on the TUI's register-changed decision code before (used to
decided whether the register should be highlighted in the register
window), for it is trying to compare all the different possible states
and contents or previous/current register contents, and as such may
need updating whenever the value machinery changes to have more state.
It's just much simpler and more future proof to compare the
previous/current printable representation instead.
The bit in tui_register_format that returns early if the register has
no name gets a bit in the way of the new prototype (what to return in
that case? NULL, empty string, etc.?). Fortunately, that check isn't
really necessary. All the callers will have already skipped unnamed
registers.
gdb/
2013-09-05 Pedro Alves <palves@redhat.com>
* tui/tui-regs.c (tui_register_format): Don't look at the
register's name here. Return string representing register
value instead of storing it in the data element.
(tui_get_register): Compare register string representations
instead of register value states and contents.
I've stumbled on this by inspection.
When the TUI's register window is first displayed, it always shows the
registers of the current frame, instead of of the selected frame,
which is obviously bogus.
E.g.,
(gdb) step # into "function"
(gdb) up
(gdb) tui reg general # or C-x 2, C-x 2
shows the registers of "function", rather than the caller's.
A subsequent:
(gdb) frame
or
(gdb) down
(gdb) up
can be used as workaround to "fix" it.
gdb/
2013-09-05 Pedro Alves <palves@redhat.com>
PR tui/15933
* tui/tui-regs.c (tui_show_registers): Show registers of the
selected frame, not the current frame.
(queue_and_load_dwo_tu): New function.
(lookup_dwo_signatured_type): Set per_cu.tu_read.
(maybe_queue_comp_unit): Rename this_cu argument to dependent_cu.
Make dependent_cu optional.
(dw2_do_instantiate_symtab): If we just loaded a CU from a DWO,
and an older .gdb_index is in use, queue and load all its TUs too.
testsuite/
* gdb.base/enumval.c (ZERO): New enum value.
(main): Use it
* gdb.base/enumval.exp: Test ability to print ZERO.
gdb/
2013-09-04 Jan Kratochvil <jan.kratochvil@redhat.com>
Code cleanup: Change OPF_DISABLE_REALPATH to OPF_RETURN_REALPATH.
* cli/cli-cmds.c (find_and_open_script): Add OPF_RETURN_REALPATH to
variable search_flags.
* defs.h (OPF_DISABLE_REALPATH): Rename to ...
(OPF_RETURN_REALPATH): ... here.
* dwarf2read.c (try_open_dwop_file): Set OPF_RETURN_REALPATH for flags.
* exec.c (exec_file_attach): Remove OPF_DISABLE_REALPATH from openp
call. Twice.
* nto-tdep.c (nto_find_and_open_solib): Add OPF_RETURN_REALPATH for
openp call.
* solib.c (solib_find): Likewise. Four times.
* source.c (openp): Change OPF_DISABLE_REALPATH to OPF_RETURN_REALPATH
in the function comment and for the realpath_fptr variable.
(source_full_path_of): Add OPF_RETURN_REALPATH for openp call.
(find_and_open_source): Likewise. Twice.
* symfile.c (symfile_bfd_open): Likewise, also twice.
Pedro Alves <palves@redhat.com>
* symfile.c (add_symbol_file_command): Error out on unknown
option. Handle EXPECTING_SEC_ADDR/EXPECTING_SEC_NAME before '-'
options and collapse into single conditional branch.
2013-09-13 Muhammad Bilal <mbilal@codesourcery.com>
Pedro Alves <palves@redhat.com>
* gdb.base/relocate.exp: Check that invalid options are
rejected.
detach_fork.
* inf-ptrace.c (inf_ptrace_follow_fork): Likewise.
* inf-ttrace.c (inf_ttrace_follow_fork): Likewise.
* inferior.h (detach_fork): Remove.
* infrun.c (detach_fork): Adjust comment and make it
static.
(follow_fork): Pass detach_fork parameter to
target_follow_fork.
* linux-nat.c (linux_child_follow_fork): New parameter
detach_fork.
* target.c (target_follow_fork): New parameter detach_fork.
Pass detach_fork as parameter and print its value.
* target.h (struct target_ops) <to_follow_fork>: New int
parameter.
(target_follow_fork): New parameter detach_fork.
The field "bfd" no longer exists in struct target_section.
Use the_bfd_section->owner instead.
gdb/ChangeLog:
* solib-ia64-hpux.c (ia64_hpux_relocate_section_addresses):
Replace sec->bfd by sec->the_bfd_section->owner.
* NEWS: Add entry mentioning support for native Windows x64
SEH data.
* amd64-windows-tdep.c: #include "objfiles.h", "frame-unwind.h",
"coff/internal.h", "coff/i386.h", "coff/pe.h" and "libcoff.h".
(struct amd64_windows_frame_cache): New struct.
(amd64_windows_w2gdb_regnum): New global.
(pc_in_range, amd64_windows_frame_decode_epilogue)
(amd64_windows_frame_decode_insns, amd64_windows_find_unwind_info)
(amd64_windows_frame_cache, amd64_windows_frame_prev_register)
(amd64_windows_frame_this_id): New functions.
(amd64_windows_frame_unwind): New static global.
(amd64_windows_skip_prologue): New function.
(amd64_windows_init_abi): Call frame_unwind_prepend_unwinder
with amd64_windows_frame_unwind. Call set_gdbarch_skip_prologue
with amd64_windows_skip_prologue.
When I looked for print_stack_frame calls in MI, I wondered why this
one passing down SRC_AND_LOC. print_stack_frame does:
/* For mi, alway print location and address. */
if (ui_out_is_mi_like_p (current_uiout))
print_what = LOC_AND_ADDRESS;
So it really doesn't matter which value is passed down, but, to avoid
confusion in readers, it's better to use the MI standard here.
There's another SRC_AND_LOC in mi-interp.c, but that one makes sense.
gdb/
2013-08-30 Pedro Alves <palves@redhat.com>
* mi/mi-main.c (mi_cmd_trace_find): Use LOC_AND_ADDRESS instead of
SRC_AND_LOC.
I noticed SRC_LINE has special handling within print_stack_frame (mid
statement handling), so I audited all uses, and noticed the one in
restore_selected_frame. I actually added this warning myself back in
2008, but reading back, I think we can do better. "reparsed frame" is
probably confusing to users.
Old:
warning: Couldn't restore frame #2 in current thread, at reparsed frame #0
45 w = 0;
(gdb)
New:
warning: Couldn't restore frame #2 in current thread. Bottom (innermost) frame selected:
#0 foo () at foo.c:45
45 w = 0;
(gdb)
Tested on x86_64 Fedora 17.
gdb/
2013-08-30 Pedro Alves <palves@redhat.com>
* thread.c (restore_selected_frame): Use SRC_AND_LOC, and change
warning text.
1 is SRC_AND_LOC.
Then, this is passing -1 as print_level argument to print_stack_frame.
-1 is not a valid print_level value (it's a regular boolean). But, it
used to be, before
<https://sourceware.org/ml/gdb-patches/2004-04/msg00585.html>.
What happened is that bsd-kvm.c did not exist at the time of that
patch, but went into the tree about a month after, without being
adjusted to the new interface.
Fixed now, exactly as e.g., ocd.c had been adjusted:
> --- ocd.c 18 Jan 2004 19:26:51 -0000 1.28
> +++ ocd.c 23 Apr 2004 14:29:12 -0000
> @@ -225,7 +225,7 @@
> flush_cached_frames ();
> registers_changed ();
> stop_pc = read_pc ();
> - print_stack_frame (get_selected_frame (), -1, 1);
> + print_stack_frame (get_selected_frame (), 0, SRC_AND_LOC);
gdb/
2013-08-30 Pedro Alves <palves@redhat.com>
* bsd-kvm.c (bsd_kvm_open, bsd_kvm_proc_cmd, bsd_kvm_pcb_cmd):
Adjust arguments to print_stack_frame.
This is declaring a function that no longer exists. It was deleted
back in 2003-01-13:
...
show_and_print_stack_frame, print_only_stack_frame_stub,
print_only_stack_frame): Delete functions.
gdb/
2013-08-30 Pedro Alves <palves@redhat.com>
* frame.h (show_and_print_stack_frame): Delete declaration.
Thread support got broken when adding 64bit support on ppc-aix.
Upon digging further, I found that the following patch...
| * gdb_ptrace.h: Use ptrace64 instead of ptrace if HAVE_PTRACE64
| is defined.
| * rs6000-nat.c: Check for __ld_info64_ if compiling 64 BIT gdb.
| (rs6000_ptrace32): Call ptrace64 instead of ptrace if present.
| (rs6000_ptrace64): Call ptace64 instead of ptracex if present.
| * configure.ac: Check for ptrace64.
| * configure, config.in: Regenerate.
... is responsible for this regression:
(gdb) x /x &__n_pthreads
0xf06a8258 <__n_pthreads>: Cannot access memory at address 0xf06a8258
Prior to the patch, we have:
(gdb) x /x &__n_pthreads
0xf06a8258 <__n_pthreads>: 0x00000003
The problem occurs inside rs6000_ptrace32, while calling ptrace64.
The address is given to rs6000_ptrace32 as an "int *", while
ptrace64 takes a "long long". The cast causes the address to be
sign-extended, which results in GDB trying to read the wrong address.
This patch fixes the issue by casting the address to a "uintptr_t"
instead, and letting the compiler do the implicit conversion to
"long long" in the function call.
gdb/ChangeLog:
* rs6000-nat.c (rs6000_ptrace32): Cast "addr" to "uintptr_t"
instead of "long long" in call to ptrace64.
https://sourceware.org/ml/gdb-patches/2013-08/msg00605.html
gdb/ChangeLog
* mi/mi-interp.c (mi_command_loop): Change signature to match
interp_command_loop_ftype.
(mi1_command_loop): Remove.
(mi2_command_loop): Remove.
(mi3_command_loop): Remove.
(mi_interpreter_resume): Remove setting of
deprecated_command_loop_hook.
(_initialize_mi_interp): Set mi_command_loop as the command loop
callback.
I came across a pattern used to construct a value in the following way:
struct value *val = allocate_value_lazy (type);
VALUE_LVAL (val) = lval_memory;
set_value_address (val, address);
Instead we fold the above call into:
value_at_lazy (type, addr);
2013-08-27 Sanimir Agovic <sanimir.agovic@intel.com>
* dwarf2loc.c (dwarf2_evaluate_loc_desc_full): Use value_at_lazy instead
of assembling value via allocate_value_lazy and attribute setter.
* findvar.c (default_read_var_value): Use value_at_lazy instead of
assembling value via allocate_value_lazy and attribute setter.
* valops.c (do_search_struct_field): Use value_at_lazy instead of
assembling value via allocate_value_lazy and attribute setter.
* python/py-framefilter.c (py_print_frame): Remove usage of
PyString_AsString. Use python_string_to_host_string instead.
Refactor function to work with a string as a new allocation
instead of a pointer.
(py_print_frame): Ditto.
* python/lib/gdb/frames.py (return_list): Cain iterators together
instead of adding them as a list.
(_sort_list): Call return_list, and remove duplicate code.
(execute_frame_filters): Convert iterator to a list with list().
* python/lib/gdb/command/frame_filters.py
(SetFrameFilterPriority._set_filter_priority): Convert priority
attribute to an integer.
* python/lib/gdb/FrameIterator.py (FrameIterator.next): Define
wrapper function __next__.
* python/lib/gdb/FrameDecorator.py: If basestring not defined,
define as "str".
2013-08-29 Phil Muldoon <pmuldoon@redhat.com>
* gdb.python/py-framefilter.py (FrameFilter.filter): Check
itertools for imap attribute. Otherwise use map().
(ElidingIterator): Define wrapper function __next__.
* gdb.python/py-framefilter-mi.exp: Do not use execfile,
use exec (open (read ())) instead.
* gdb.python/py-framefilter.exp: Ditto.
* gdb.python/py-arch.exp: Update print based test to Python 3.x
compliance.
* gdb.python/py-frame.exp: Ditto.
* gdb.python/py-type.exp: Ditto.
As uintptr_t is used stdint.h must be included on all architectures.
2013-08-28 Will Newton <will.newton@linaro.org>
* common/linux-ptrace.c: Include stdint.h unconditionally.
This stops another target from installing a
target_ops->deprecated_xfer_memory method.
Tested on native MinGW.
gdb/
2013-08-27 Pedro Alves <palves@redhat.com>
* windows-nat.c (windows_xfer_memory): Adjust prototype to follow
xfer_partial's interface. Return TARGET_XFER_E_IO on error.
(windows_xfer_partial): Defer TARGET_OBJECT_MEMORY handling to
windows_xfer_memory directly.
(init_windows_ops): Don't install a deprecated_xfer_memory method.
darwin_xfer_partial already handles TARGET_OBJECT_MEMORY, so this
method is not necessary.
gdb/
2013-08-27 Pedro Alves <palves@redhat.com>
* darwin-nat.c (darwin_xfer_memory): Delete.
(_initialize_darwin_inferior): Don't install a
deprecated_xfer_memory method.
This is the patch to add new option '--skip-unavailable' to MI
commands '-stack-list-{locals, arguments, variables}'. This patch
extends list_args_or_locals to add a new parameter 'skip_unavailable',
and don't list locals or arguments if values are unavailable and
'skip_unavailable' is true.
This is inspecting a trace frame (tfind mode), where only a few
locals have been collected.
-stack-list-locals, no switch vs new switch:
-stack-list-locals --simple-values
^done,locals=[{name="array",type="unsigned char [2]"},{name="i",type="int",value="<unavailable>"}]
-stack-list-locals --skip-unavailable --simple-values
^done,locals=[{name="array",type="unsigned char [2]"}]
-stack-list-arguments, no switch vs new switch:
-stack-list-arguments --simple-values
^done,stack-args=[frame={level="0",args=[{name="j",type="int",value="4"},{name="s",type="char *",value="<unavailable>"}]},frame={level="1",args=[]}]
-stack-list-arguments --skip-unavailable --simple-values
^done,stack-args=[frame={level="0",args=[{name="j",type="int",value="4"}]},frame={level="1",args=[]}]
-stack-list-variables, no switch vs new switch:
-stack-list-variables --simple-values
^done,variables=[{name="j",arg="1",type="int",value="4"},{name="s",arg="1",type="char *",value="<unavailable>"},{name="array",type="unsigned char [2]"},{name="i",type="int",value="<unavailable>"}]
-stack-list-variables --skip-unavailable --simple-values
^done,variables=[{name="j",arg="1",type="int",value="4"},{name="array",type="unsigned char [2]"}]
tests are added to test these new options.
gdb:
2013-08-27 Pedro Alves <pedro@codesourcery.com>
Yao Qi <yao@codesourcery.com>
* mi/mi-cmd-stack.c (list_args_or_locals): Adjust prototype.
(parse_no_frames_option): Remove.
(mi_cmd_stack_list_locals): Handle --skip-unavailable.
(mi_cmd_stack_list_args): Adjust.
(mi_cmd_stack_list_variables): Handle --skip-unavailable.
(list_arg_or_local): Add new parameter 'skip_unavailable'. Return
early if SKIP_UNAVAILABLE is true and ARG->val is unavailable.
Caller update.
(list_args_or_locals): New parameter 'skip_unavailable'.
Handle it.
* valprint.c (scalar_type_p): Rename to ...
(val_print_scalar_type_p): ... this. Make extern.
(val_print, value_check_printable): Adjust.
* valprint.h (val_print_scalar_type_p): Declare.
* value.c (value_entirely_unavailable): New function.
* value.h (value_entirely_unavailable): Declare.
* NEWS: Mention the new option "--skip-unavailable" to MI
commands '-stack-list-locals', '-stack-list-arguments' and
'-stack-list-variables'.
gdb/doc:
2013-08-27 Pedro Alves <pedro@codesourcery.com>
Yao Qi <yao@codesourcery.com>
* gdb.texinfo (GDB/MI Stack Manipulation) <-stack-list-locals>:
Document new --skip-unavailable option.
<-stack-list-variables>: Document new --skip-unavailable option.
gdb/testsuite:
2013-08-27 Yao Qi <yao@codesourcery.com>
* gdb.trace/entry-values.exp: Test unavailable entry value is
not shown when option '--skip-unavailable' is specified.
* gdb.trace/mi-trace-unavailable.exp (test_trace_unavailable):
Add tests for new option '--skip-unavailable'.
This patch is to add a new function mi_getopt_allow_unknown, which
returns -1 silently (without throwing error) when unknown option is
met, and use this function to parse options for command
'-stack-list-arguments'.
gdb/
* mi/mi-cmd-stack.c (parse_no_frames_option): Remove.
(mi_cmd_stack_list_args): Use mi_getopt_silent to handle
options.
* mi/mi-getopt.c (mi_getopt): Remove.
(mi_getopt_1): Renamed from mi_getopt. Add one parameter
'error_on_unknown'.
(mi_getopt): Call mi_getopt_1.
(mi_getopt_silent): New.
* mi/mi-getopt.h (mi_getopt_silent): Declare.
* symmisc.c (maintenance_print_objfiles): Argument is now an optional
regexp of objfiles to print.
(_initialize_symmisc): Update doc string for "mt print objfiles".
doc/
* gdb.texinfo (Maintenance Commands): "maint print objfiles" now takes
an optional regexp.
(dump_msymbols, dump_objfile): Ditto.
(maintenance_info_symtabs): Mark as dont_repeat.
(_initialize_symmisc): Improve doc string for "mt info symtabs".
'ret' is used to hold the return of target_read, and pass it on. Both
target_read and target_read_live_memory return LONGEST.
gdb/
2013-08-23 Pedro Alves <palves@redhat.com>
* target.c (target_read_live_memory): Change type of 'ret' local
to LONGEST.
There's no need for deprecated_xfer_memory nowadays. Memory access
goes through target_xfer_partial/TARGET_OBJECT_MEMORY, etc. In fact,
the remote target already handles that, and is deferring to the same
helpers the deprecated_xfer_memory hook is. Basically, only a few
adjustments to make these helper routines's interfaces closer to
target_xfer_partial's were necessary.
Tested on x86_64 Fedora 17 w/ gdbserver.
gdb/
2013-08-23 Pedro Alves <palves@redhat.com>
* remote.c (remote_write_bytes_aux, remote_write_bytes)
(remote_read_bytes): Change return type to LONGEST, and adjust to
return a target_xfer_error on error.
(remote_xfer_memory): Delete.
(remote_flash_write): Change type of 'ret' local to LONGEST.
(remote_xfer_partial, remote_xfer_partial): Adjust.
(init_remote_ops): Don't install a deprecated_xfer_memory hook.
PR gdb/15501
* breakpoint.c (enable_command, disable_command): Iterate over
all specified breakpoint locations.
2013-07-12 Muhammad Waqas <mwaqas@codesourccery.com>
PR gdb/15501
* gdb.base/ena-dis-br.exp: Add test to verify
enable/disable commands work correctly with
multiple arguments that include multiple locations.
This time, it passes all the tests and comes with a nearly complete
XML file (plus a script that can nearly regenerate the XML file).
(I elected to leave out __ARM_NR_cmpxchg, since it has dire warnings
to the effect that the only pieces of code that should be aware of it
are the implementation and the __kuser_cmpxchg code in entry-armv.S.)
gdb/
2013-08-14 Samuel Bronson <naesten@gmail.com>
ARM Linux support for `catch syscall'.
* syscalls/arm-linux.py: New file.
* syscalls/arm-linux.xml: Likewise.
* arm-linux-tdep.c (arm_linux_get_syscall_number): New function.
(arm_linux_init_abi): Register the new function and syscall xml file.
* data-directory/Makefile.in: Install the new syscall xml file.
* NEWS: Brag about this.
gdb/testsuite/
2013-08-14 Samuel Bronson <naesten@gmail.com>
ARM Linux support for `catch syscall'.
* gdb.base/catch-syscall.exp: Test this on ARM now.
(fill_all_syscalls_numbers): ARM has close/chroot on 6/61, too.
In entry-values.exp, we have a test where the entry value of 'j' is
unavailable, so it is expected that printing j@entry yields
"<unavailable>". However, the actual output is:
(gdb) frame
#0 0x0000000000400540 in foo (i=0, i@entry=2, j=2, j@entry=<error reading variable: Cannot access memory at address 0x6009e8>)
The error is thrown here:
#0 throw_it (reason=RETURN_ERROR, error=MEMORY_ERROR, fmt=0x8cd550 "Cannot access memory at address %s", ap=0x7fffffffc8e8) at ../../src/gdb/exceptions.c:373
#1 0x00000000005e2f9c in throw_error (error=MEMORY_ERROR, fmt=0x8cd550 "Cannot access memory at address %s") at ../../src/gdb/exceptions.c:422
#2 0x0000000000673a5f in memory_error (status=5, memaddr=6293992) at ../../src/gdb/corefile.c:204
#3 0x0000000000673aea in read_memory (memaddr=6293992, myaddr=0x7fffffffca60 "\200\316\377\377\377\177", len=4) at ../../src/gdb/corefile.c:223
#4 0x00000000006784d1 in dwarf_expr_read_mem (baton=0x7fffffffcd50, buf=0x7fffffffca60 "\200\316\377\377\377\177", addr=6293992, len=4) at ../../src/gdb/dwarf2loc.c:334
#5 0x000000000067645e in execute_stack_op (ctx=0x1409480, op_ptr=0x7fffffffce87 "\237<\005@", op_end=0x7fffffffce88 "<\005@") at ../../src/gdb/dwarf2expr.c:1045
#6 0x0000000000674e29 in dwarf_expr_eval (ctx=0x1409480, addr=0x7fffffffce80 "\003\350\t`", len=8) at ../../src/gdb/dwarf2expr.c:364
#7 0x000000000067c5b2 in dwarf2_evaluate_loc_desc_full (type=0x10876d0, frame=0xd8ecc0, data=0x7fffffffce80 "\003\350\t`", size=8, per_cu=0xf24c40, byte_offset=0)
at ../../src/gdb/dwarf2loc.c:2236
#8 0x000000000067cc65 in dwarf2_evaluate_loc_desc (type=0x10876d0, frame=0xd8ecc0, data=0x7fffffffce80 "\003\350\t`", size=8, per_cu=0xf24c40)
at ../../src/gdb/dwarf2loc.c:2407
#9 0x000000000067a5d4 in dwarf_entry_parameter_to_value (parameter=0x13a7960, deref_size=18446744073709551615, type=0x10876d0, caller_frame=0xd8ecc0, per_cu=0xf24c40)
at ../../src/gdb/dwarf2loc.c:1160
#10 0x000000000067a962 in value_of_dwarf_reg_entry (type=0x10876d0, frame=0xd8de70, kind=CALL_SITE_PARAMETER_DWARF_REG, kind_u=...) at ../../src/gdb/dwarf2loc.c:1310
#11 0x000000000067aaca in value_of_dwarf_block_entry (type=0x10876d0, frame=0xd8de70, block=0xf1c2d4 "Q", block_len=1) at ../../src/gdb/dwarf2loc.c:1363
#12 0x000000000067e7c9 in locexpr_read_variable_at_entry (symbol=0x13a7540, frame=0xd8de70) at ../../src/gdb/dwarf2loc.c:3326
#13 0x00000000005daab6 in read_frame_arg (sym=0x13a7540, frame=0xd8de70, argp=0x7fffffffd0e0, entryargp=0x7fffffffd100) at ../../src/gdb/stack.c:362
#14 0x00000000005db384 in print_frame_args (func=0x13a7470, frame=0xd8de70, num=-1, stream=0xea3890) at ../../src/gdb/stack.c:669
#15 0x00000000005dc338 in print_frame (frame=0xd8de70, print_level=1, print_what=SRC_AND_LOC, print_args=1, sal=...) at ../../src/gdb/stack.c:1199
#16 0x00000000005db8ee in print_frame_info (frame=0xd8de70, print_level=1, print_what=SRC_AND_LOC, print_args=1) at ../../src/gdb/stack.c:851
#17 0x00000000005da2bb in print_stack_frame (frame=0xd8de70, print_level=1, print_what=SRC_AND_LOC) at ../../src/gdb/stack.c:169
#18 0x00000000005de236 in frame_command (level_exp=0x0, from_tty=1) at ../../src/gdb/stack.c:2265
dwarf2_evaluate_loc_desc_full (frame #7) knows to handle
NOT_AVAILABLE_ERROR errors, but read_memory always throws
a generic error.
Presently, only the value machinery knows to handle unavailable
memory. We need to push the awareness down to the target_xfer layer,
making it return a finer grained error indication. We can only return
a generic -1 nowadays, which leaves the upper layers with no clue on
why the xfer failed. Use target_xfer_partial directly, rather than
propagating the error through target_read_memory so as to get a better
address to display in the error message.
(target_read_memory & friends build on top of target_read (thus the
target_xfer machinery), but turn all errors to EIO, an errno value. I
think this is a mistake, and we'd better convert all these to return a
target_xfer_error too, but that can be done separately. I looked
around a bit over memory_error calls, and the need to handle random
errno values, other than the EIOs gdb itself hardcodes, probably comes
(only) from deprecated_xfer_memory, which uses errno for error
indication, but I didn't look exhaustively. We should really get rid
of deprecated_xfer_memory and of passing down errno values as error
indication in target_read & friends methods).
Tested on x86_64 Fedora 17, native and gdbserver. Fixes the test in
the PR, which will be added to the testsuite later.
gdb/
2013-08-22 Pedro Alves <palves@redhat.com>
PR gdb/15871
* corefile.c (target_xfer_memory_error): New function.
(memory_error): Defer EIO to target_memory_error.
(read_memory): Use target_xfer_partial, and handle finer-grained
target xfer errors.
* target.c (target_xfer_error_to_string): New function.
(memory_xfer_partial_1): If memory is known to be
unavailable, return TARGET_XFER_E_UNAVAILABLE instead of -1.
(target_xfer_partial): Make extern.
* target.h (enum target_xfer_error): New enum.
(target_xfer_error_to_string): Declare function.
(target_xfer_partial): Declare function.
(struct target_ops) <xfer_partial>: Adjust describing comment.
(pending_macros): Ditto.
(get_macro_table): New function.
(buildsym_init): Initialize subfile_stack.
* coffread.c (type_vector,type_vector_length): Moved here from
buildsym.h.
(INITIAL_TYPE_VECTOR_LENGTH): Ditto.
(coff_symtab_read): Use it.
* dbxread.c (read_ofile_symtab): Delete init of subfile_stack.
* dwarf2read.c (macro_start_file): Replace uses of pending_macros
with call to get_macro_table.
* stabsread.c (type_vector,type_vector_length): Moved here from
buildsym.h.
(INITIAL_TYPE_VECTOR_LENGTH): Ditto.
* buildsym.h (get_macro_table): Declare.
This fixes PR python/15816.
The bug here is that python-selftest.exp can fail:
No symbol "RETURN_MASK_ALL" in current context.
RETURN_MASK_ALL is a macro, so if macros do not end up in the
debuginfo (very typical) then the test fails.
It seemed simplest to me to simply turn the RETURN_MASK_ defines into
enum constants. This way they end up in the debuginfo and all is
well.
PR python/15816:
* exceptions.h (return_mask): Now an enum.
(RETURN_MASK_QUIT, RETURN_MASK_ERROR, RETURN_MASK_ALL): Now
enum constants.
Built and regtested on x86-64 Fedora 18.
This moves the "gdbarch" field from the objfile into the BFD.
This field's value is derived from the BFD and is immutable over the
lifetime of the BFD. This makes it a reasonable candidate for pushing
into the per-BFD object.
This is part of the long-term objfile splitting project. In the long
run I think this patch will make it simpler to moves types from the
objfile to the per-BFD object; but the patch makes sense as a minor
cleanup by itself.
Built and regtested on x86-64 Fedora 18.
* cp-namespace.c (cp_lookup_symbol_imports_or_template): Use
get_objfile_arch.
* elfread.c (elf_rel_plt_read, elf_gnu_ifunc_record_cache)
(elf_gnu_ifunc_resolve_by_got): Use get_objfile_arch.
* jit.c (jit_object_close_impl): Update.
* jv-lang.c (get_dynamics_objfile): Update.
* linespec.c (add_minsym): Use get_dynamics_objfile.
* objfiles.c (get_objfile_bfd_data): Initialize 'gdbarch' field.
(allocate_objfile): Don't initialize 'gdbarch' field.
(get_objfile_arch): Update.
* objfiles.h (struct objfile_per_bfd_storage) <gdbarch>: New field,
moved from...
(struct objfile) <gdbarch>: ... here. Remove.
* stap-probe.c (stap_can_evaluate_probe_arguments): Use
get_objfile_arch.
* symfile.c (init_entry_point_info): Use get_objfile_arch.
for IBM long double nan and inf.
(floatformat_is_negative, floatformat_classify,
floatformat_mantissa): Similarly.
(floatformat_ieee_single, floatformat_ieee_double,
floatformat_ieee_quad, floatformat_arm_ext,
floatformat_ia64_spill): Delete unused vars.
(_initialize_doublest): Delete unused function.
* gdbtypes.c (floatformats_ibm_long_double): Use new big- and
little-endian variants of floatformat_ibm_long_double.
* Makefile.in (SFILES): Remove common/target-common.c and
add target/waitstatus.c.
(HFILES_NO_SRCDIR): Remove common/target-common.h and add
target/resume.h, target/wait.h and target/waitstatus.h.
(COMMON_OBS): Remove target-common.o and add
waitstatus.o.
(target-common.o): Remove.
(waitstatus.o): New target object file.
* common/target-common.c: Move contents to
target/waitstatus.c and remove.
* common/target-common.h: Move contents to other files and
remove.
(enum resume_kind: Move to target/resume.h.
(TARGET_WNOHANG): Move to target/wait.h.
(enum target_waitkind): Move to target/waitstatus.h.
(struct target_waitstatus): Likewise.
* target.h: Do not include target-common.h and
include target/resume.h, target/wait.h and
target/waitstatus.h.
* target/resume.h: New file.
* target/wait.h: New file.
* target/waitstatus.h: New file.
* target/waitstatus.c: New file.
gdb/gdbserver/
* Makefile.in (INCLUDE_CFLAGS): Include -I$(srcdir)/../.
(SFILES): Remove $(srcdir)/common/target-common.c and
add $(srcdir)/target/waitstatus.c.
(OBS): Remove target-common.o and add waitstatus.o.
(server_h): Remove $(srcdir)/../common/target-common.h and
add $(srcdir)/../target/resume.h, $(srcdir)/../target/wait.h
and $(srcdir)/../target/waitstatus.h.
(target-common.o): Remove.
(waitstatus.o): New target object file.
* target.h: Do not include target-common.h and
include target/resume.h, target/wait.h and
target/waitstatus.h.
In http://sourceware.org/ml/gdb-patches/2013-08/msg00174.html , the
issue of child signal handling around ptrace option support discovery
being different between GDB and GDBserver came up.
I recalled adding these block_child_signals calls, and the "We don't
want those ptrace calls to be interrupted" comment, but not exactly
why. So I looked into it. My first guess is that I got confused.
The patch that added this
<http://sourceware.org/ml/gdb-patches/2009-04/msg00125.html> rewrote
the linux native async support completely, and the old async support
code had the SIGCHLD handler itself do waitpid, so in places that we'd
want a blocking waitpid, we'd have to have the signal handler blocked.
That was probably the mindset I had at the time. Anyway, whatever the
case, looks like I was wrong on the need for this blocking.
Given GDBserver doesn't block like this, I investigated why this is
currently needed on GDB but not on GDBserver.
I removed the block_child_signals (and restore) calls, and hacked
linux-nat.c to call linux_test_for_tracefork in a loop, like:
@@ -534,7 +534,10 @@ static int
linux_supports_tracefork (int pid)
{
if (linux_supports_tracefork_flag == -1)
- linux_test_for_tracefork (pid);
+ {
+ while (1)
+ linux_test_for_tracefork (pid);
+ }
return linux_supports_tracefork_flag;
}
Running the resulting GDB, I then saw bad things happening.
Specifically, I'd end up with a bunch of zombies, and eventually, the
machine would refuse to spawn new processes, claming insufficient
resources.
The issue is that linux_test_for_tracefork test forks, and has the
child fork again. If we don't block SIGCHLD on entry to the function,
the children will inherit SIGCHLD's action/disposition (meaning,
SIGCHLD will be unblocked in the child). When the first child forks
again a second child, and that child exits, the first child gets a
SIGCHLD. Now, when we try to wrap up for the whole options test, we
kill the first child, and collect the waitstatus. Here, when SIGCHLD
isn't blocked, GDB will first see the child reporting a stop with
SIGCHLD. gdbserver's ptrace options test does a PTRACE_KILL loop at
the end, which catches the SIGCHLD, and retries the kill. The GDB
version did not do that. So the GDB version would proceed, leaving
the child zombie (until GDB exists), as nothing collected its final
waitstatus.
So this patch makes the GDB version of linux_test_for_tracefork do the
exact same as the GDBserver version, removes all this unnecessary
blocking throughout, and adds a couple comments at places that do need
it -- namely: places where we'll use sleep with sigsuspend; and
linux_async_pipe, as that destroys the pipe the signal handler
touches.
Tested on x86_64 Fedora 17, sync and async.
gdb/
2013-08-19 Pedro Alves <palves@redhat.com>
* linux-nat.c (linux_test_for_tracefork)
(linux_test_for_tracesysgood, linux_child_follow_fork)
(lin_lwp_attach_lwp, linux_nat_resume): Don't block child signals.
(linux_nat_wait_1): Extend comment.
(linux_async_pipe): Add comment.
This moves a few static variables from thread-info functions into
remote_state. Pedro said on irc that these functions implement the
ancient thread-discovery method and that he wouldn't be surprised if
they had rotted; nevertheless it seems safer to me to make them
explicitly per-remote.
This necessitated moving a couple of macros and a typedef earlier in
the file.
* remote.c (struct remote_state) <echo_nextthread, nextthread,
resultthreadlist>: New fields.
(OPAQUETHREADBYTES, threadref, MAXTHREADLISTRESULTS): Move earlier.
(remote_get_threadlist, remote_threadlist_iterator): Use
new fields. Remove static variables.
This moves the globals remote_stopped_by_watchpoint_p and
remote_watch_data_address into remote_state.
* remote.c (struct remote_state) <remote_stopped_by_watchpoint_p,
remote_watch_data_address>: New fields.
(remote_stopped_by_watchpoint_p, remote_watch_data_address): Remove.
(process_stop_reply, remote_wait_as)
(remote_check_watch_resources, remote_stopped_data_address): Update.
The global sizeof_pkt is only used in remote_trace_find, like so:
reply = remote_get_noisy_reply (&(rs->buf), &sizeof_pkt);
I think in this situation it is more correct to use the recorded size
of the buffer. Otherwise it seems that some skew could result.
* remote.c (sizeof_pkt): Remove.
(remote_trace_find): Use rs->buf_size, not sizeof_pkt.
This moves the use_threadextra_query and use_threadinfo_query globals
into remote_state.
* remote.c (struct remote_state) <use_threadinfo_query,
use_threadextra_query>: New fields.
(remote_threads_info, remote_threads_extra_info)
(remote_open_1): Update.
This moves a few static variables out of remote_read_qxfer and into
remote_state.
* remote.c (struct remote_state) <finished_object,
finished_annex, finished_offset>: New fields.
(remote_read_qxfer): Use remote_state fields; remove static
variables.
This moves the global last_sent_step into remote_state.
* remote.c (struct remote_state) <last_sent_step>:
New field.
(last_sent_step): Remove.
(remote_resume, remote_wait_as): Update.
This moves the global last_sent_signal into remote_state.
* remote.c (struct remote_state) <last_sent_signal>:
New field.
(last_sent_signal): Remove.
(new_remote_state, remote_resume, remote_wait_as): Update.
This moves the global last_program_signals_packet into remote_state.
* remote.c (struct remote_state) <last_program_signals_packet>:
New field.
(last_program_signals_packet): Remove.
(remote_program_signals, remote_open_1): Update.
This moves the global last_pass_packet into remote_state.
* remote.c (struct remote_state) <last_pass_packet>:
New field.
(last_pass_packet): Remove.
(remote_pass_signals, remote_open_1): Update.
This moves the global remote_traceframe_number into remote_state.
* remote.c (struct remote_state) <remote_traceframe_number>:
New field.
(remote_traceframe_number): Remove.
(new_remote_state, remote_open_1, set_remote_traceframe)
(remote_trace_find): Update.
Add new_remote_state and change remote_state to be a pointer. This is
a preparatory patch for a later series. It could perhaps be omitted,
but new_remote_state also does some initialization that was previously
done for the globals.
* remote.c (remote_state): Now a pointer.
(get_remote_state_raw): Update.
(new_remote_state): New function.
(_initialize_remote): Use new_remote_state.
gdb has a copy of some CRC code that also appears in libiberty.
This patch just removes the local copy.
You may notice that "crc32" returns unsigned long but "xcrc32" returns
unsigned int. However, this does not matter, because crc32 actually
does all its operations in unsigned int type, and only the return
result is widened. So, the difference does not matter.
* remote.c (crc32_table, crc32): Remove.
(remote_verify_memory): Use xcrc32.
in order to match GNU Coding Standards.
2013-08-13 Sergio Durigan Junior <sergiodj@redhat.com>
* value.h (create_internalvar_type_lazy): Adjust prototype
declaration.
http://sourceware.org/ml/gdb-patches/2013-08/msg00340.html
gdb/ChangeLog
* common/format.c (parse_format_string): Don't allow '#' flag for
pointer arguments in format string.
gdb/testsuite/ChangeLog
* gdb.base/printcmds.exp (test_printf): Add test for printf of
pointer with various flags.
<http://sourceware.org/ml/gdb-patches/2013-08/msg00289.html>
I have chosen to revert the patch applied to the AVR target-dependent code.
Therefore, this patch does just that. It is better to keep the tree
buildable than to keep this patch in, for now.
2013-08-12 Sergio Durigan Junior <sergiodj@redhat.com>
Revert implementation of gdbarch_gdb_signal_{to,from}_target for
AVR.
* avr-tdep.c: Remove include of "linux-tdep.h". Remove enum with
different signals between the generic Linux kernel implementation
and AVR's.
(avr_linux_gdb_signal_from_target): Delete.
(avr_linux_gdb_signal_to_target): Delete.
(avr_gdbarch_init): Don't set gdbarch_gdb_signal_{to,from}_target.
It will be used when one wants to convert between the internal GDB signal
representation (enum gdb_signal) and the target's representation.
The idea of this patch came from a chat between Pedro and I on IRC, plus
the discussion of my patches to add the new $_exitsignal convenience
variable:
<http://sourceware.org/ml/gdb-patches/2013-06/msg00452.html>
<http://sourceware.org/ml/gdb-patches/2013-06/msg00352.html>
What I did was to investigate, on the Linux kernel, which targets shared
the signal numbers definition with the generic definition, present at
<include/uapi/asm-generic/signal.h>. For the record, I used linux-3.10-rc7
as the main source of information, always looking at
<arch/<ARCH_NAME>/include/uapi/asm/signal.h>. For SIGRTMAX (which defaults
to _NSIG in most cases), I had to look at different signal-related
files, but most of them (except MIPS) were defined to 64 anyway.
Then, with all the differences in hand, I implemented the bits on each
target.
2013-08-09 Sergio Durigan Junior <sergiodj@redhat.com>
* linux-tdep.c: Define enum with generic signal numbers.
(linux_gdb_signal_from_target): New function.
(linux_gdb_signal_to_target): Likewise.
(linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target
methods to the functions above.
* linux-tdep.h (linux_gdb_signal_from_target): New prototype.
(linux_gdb_signal_to_target): Likewise.
* alpha-linux-tdep.c: Define new enum with signals different
from generic Linux kernel.
(alpha_linux_gdb_signal_from_target): New function.
(alpha_linux_gdb_signal_to_target): Likewise.
(alpha_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target
with the functions mentioned above.
* avr-tdep.c: Define enum with differences between Linux kernel
and AVR signals.
(avr_linux_gdb_signal_from_target): New function.
(avr_linux_gdb_signal_to_target): Likewise.
(avr_gdbarch_init): Set gdbarch_gdb_signal_{to,from}_target to
the functions mentioned above.
* sparc-linux-tdep.c: Define enum with differences between SPARC
and generic Linux kernel signal numbers.
(sparc32_linux_gdb_signal_from_target): New function.
(sparc32_linux_gdb_signal_to_target): Likewise.
(sparc32_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target
to the functions defined above.
* xtensa-linux-tdep.c: Define enum with differences between
Xtensa and Linux kernel generic signals.
(xtensa_linux_gdb_signal_from_target): New function.
(xtensa_linux_gdb_signal_to_target): Likewise.
(xtensa_linux_init_abi): Set gdbarch_gdb_signal_to_target
to the functions defined above.
* mips-linux-tdep.c: Define enum with differences between
signals in MIPS and Linux kernel generic ones.
(mips_gdb_signal_to_target): New function.
(mips_gdb_signal_from_target): Redefine to use new enum, handle
only different signals from the Linux kernel generic.
(mips_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target
the functions defined above.
* mips-linux-tdep.h (enum mips_signals): Remove.
XMALLOC is defined in defs.h.
Tested by building with --enable-targets=all.
gdb/
2013-08-09 Pedro Alves <palves@redhat.com>
* avr-tdep.c (XMALLOC): Delete macro.
* cli/cli-dump.c (XMALLOC): Delete macro.
I noticed the functions declared in cli-dump.h aren't used anywhere
outside cli-dump.c.
The original patch that introduced cli-dump.c didn't include this header:
http://sourceware.org/ml/gdb-patches/2002-03/msg00518.html
But for some reason that I couldn't find from reading the archives around
that patch's discussion, cli-dump.h was introduced in the final checkin,
at:
http://sourceware.org/ml/gdb-patches/2002-03/msg00596.html
There seems to be no point in keeping this around nowadays.
gdb/
2013-08-09 Pedro Alves <palves@redhat.com>
* cli/cli-dump.c: Don't include cli/cli-dump.h.
(scan_expression_with_cleanup, scan_filename_with_cleanup)
(fopen_with_cleanup, add_dump_command): Make static.
* cli/cli-dump.h: Delete file.
* Makefile.in (HFILES_NO_SRCDIR): Remove reference to
cli/cli-dump.h.
Before:
(gdb) tsave ~/a/b
Unable to open file '~/a/b' for saving trace data (No such file or directory)
After:
(gdb) tsave ~/a/b
Unable to open file '/home/pedro/a/b' for saving trace data (No such file or directory)
Tested on x86_64 Fedora 17.
gdb/
2013-08-09 Pedro Alves <palves@redhat.com>
* tracepoint.c (tfile_start): Show tilde-expanded filename in
error message.
Most commands in GDB show the tilde-expanded filename in user visible
output. This makes "save breakpoints" behave the same.
Before:
(gdb) save breakpoints ~/a/b
Unable to open file '~/a/b' for saving (No such file or directory)
After:
(gdb) save breakpoints ~/a/b
Unable to open file '/home/pedro/a/b' for saving (No such file or directory)
Tested on x86_64 Fedora 17.
gdb/
2013-08-09 Pedro Alves <palves@redhat.com>
* breakpoint.c (save_breakpoints): Show tilde-expanded filename in
error message.
Most commands in GDB show the tilde-expanded filename in user visible
output. This makes gcore behave the same.
Before:
(gdb) generate-core-file ~/a/b
Failed to open '~/a/b' for output.
(gdb) generate-core-file ~/core
Saved corefile ~/core
After:
(gdb) generate-core-file ~/a/b
Failed to open '/home/pedro/a/b' for output.
(gdb) generate-core-file ~/core
Saved corefile /home/pedro/core
Tested on x86_64 Fedora 17.
gdb/
2013-08-09 Pedro Alves <palves@redhat.com>
* gcore.c (create_gcore_bfd): Don't use tilde_expand here.
(gcore_command): Use tilde_expand here, and when showing the
filename to the user, show the expanded version.
* stack.c (read_frame_arg): Set 'entryval_error' to NULL if
'entryval' is set.
gdb/testsuite/
* gdb.trace/collection.exp (gdb_collect_args_test): Set
"only" and "both" to 'print entry-values' before selecting
trace frame.
Before this patch, this fails:
(gdb) generate-core-file ~/core
Failed to open '~/core' for output.
After the patch:
(gdb) generate-core-file ~/core
Saved corefile ~/core
gdb/
2013-08-08 Azat Khuzhin <a3at.mail@gmail.com> (tiny change)
* gcore.c (create_gcore_bfd): Use tilde_expand.
* frame.h (read_frame_local): Declare.
* mi/mi-cmd-stack.c (list_args_or_locals): Call
read_frame_local.
* stack.c (read_frame_local): New.
gdb/testsuite/
* gdb.trace/mi-trace-unavailable.exp: Don't set
"print entry-values" to "no".
(test_trace_unavailable): Set various values to
"print entry-values" to test that the output of
'-stack-list-locals' is not affected, and then set
set "print entry-values" to "no".
This fixes some derivation.exp regressions with "dwz -m".
The bug here is that the imported PU is given language_minimal.
However, it ought to be C++.
The "pretend language" machinery exists to solve this problem, but it
wasn't handled in process_psymtab_comp_unit. So, this patch adds it
there.
Built and regtested, both normally and using "dwz -m", on x86-64
Fedora 18.
PR symtab/15028:
* dwarf2read.c (struct process_psymtab_comp_unit_data): New.
(process_psymtab_comp_unit_reader): Use it.
(process_psymtab_comp_unit): Update. Add "pretend_language"
argument.
(dwarf2_build_psymtabs_hard): Update.
(scan_partial_symbols): Pass CU's language to
process_psymtab_comp_unit.
After the previous patch in the series, nothing uses the "quick"
method find_symbol_file.
This patch removes it.
Tested by rebuilding.
* dwarf2read.c (dw2_get_primary_filename_reader): Remove.
(dwarf2_gdb_index_functions): Update.
* psymtab.c (find_symbol_file_from_partial): Remove.
(psym_functions): Update.
* symfile.h (struct quick_symbol_functions) <find_symbol_file>:
Remove.
With "dwz -m", "main" appears in both the PU and the importing CU when
running anon-struct.exp. However, the PU does not have a file name.
So, find_main_filename returns the empty string, making
deduce_language_from_filename return language_unknown.
This patch fixes this problem by changing gdb to use the ordinary
symbol-lookup functions to find "main"'s symbol. Then, it examines the
symbol's language.
I think this is cleaner than the current approach. For one thing it
avoids trying to guess the language based on the source file name,
instead deferring to the presumably more reliable debuginfo.
Another possible fix would have been to change how the file name is
found via the "qf" methods. However, I think the approach given is
preferable for the reason outlined above.
This required a minor test suite change, as now a symtab is expanded
during the search for "main".
Built and regtested (both ways) on x86-64 Fedora 18.
* symfile.c (set_initial_language): Look up "main" symbol
and use its language.
* symtab.c (find_main_filename): Remove.
* symtab.h (find_main_filename): Remove.
* gdb.base/maint.exp: Allow zero symtabs to be expanded.
Doug pointed out a while ago that in the final dwz -m patch, nothing
ever set symtab::user.
This patch fixes this oversight and adds a test case showing why it is
important.
Built and regtested (both ways) on x86-64 Fedora 18.
The new test unconditionally tests the partial unit machinery, which I
think is an added plus.
* dwarf2read.c (recursively_compute_inclusions): Add
"immediate_parent" argument. Set symtab's "user" field
if not set.
(compute_symtab_includes): Update.
* gdb.dwarf2/dwz.exp: New file.
The bug here is that, with dwz -m, a function (and a label) appear in
both a PU and a CU when running cplabel.exp. So, a breakpoint gets
two locations:
(gdb) break foo::bar:to_the_top
Breakpoint 2 at 0x400503: foo::bar:to_the_top. (2 locations)
What is especially wacky is that both locations are at the same place:
(gdb) info b
Num Type Disp Enb Address What
1 breakpoint keep y <MULTIPLE>
1.1 y 0x000000000040051c foo::bar:get_out_of_here
1.2 y 0x000000000040051c foo::bar:get_out_of_here
This happens due to the weird way we run "dwz -m".
It's unclear to me that this would ever happen for real code.
While I think this borders on "diminishing returns" territory, the fix
is pretty straightforward: use the existing address-filtering function
in linespec to also filter when looking at labels.
Built and regtested (both ways) on x86-64 Fedora 18.
* linespec.c (convert_linespec_to_sals): Use maybe_add_address
when adding label symbols.
Ulrich Weigand <uweigand@de.ibm.com>
* gdb_ptrace.h: Use ptrace64 instead of ptrace if HAVE_PTRACE64
is defined.
* rs6000-nat.c: Check for __ld_info64_ if compiling 64 BIT gdb.
(rs6000_ptrace32): Call ptrace64 instead of ptrace if present.
(rs6000_ptrace64): Call ptace64 instead of ptracex if present.
* configure.ac: Check for ptrace64.
* configure, config.in: Regenerate.
Ulrich Weigand <uweigand@de.ibm.com>
* aixthread.c: Call ptrace64 instead of ptracex if defined.
Call ptrace64 instead of ptrace if defined.
Add macro addr_ptr to take care of ptrace address argument.
(pdc_read_regs): Likewise.
(pdc_write_regs): Likewise.
(aix_thread_resume): Likewise.
(fetch_regs_kernel_thread): Likewise.
(store_regs_kernel_thread): Likewise.
This removes a few more erroneous calls to add_target. These calls
end up installing the target in a user-visible way; but these targets
are all auto-activated and, I think, should never be explicitly
requested.
I have no way to test these.
* aix-thread.c (_initialize_aix_thread): Use
complete_target_initialization.
* bsd-uthread.c (_initialize_bsd_uthread): Use
complete_target_initialization.
* dec-thread.c (_initialize_dec_thread): Use
complete_target_initialization.
* ravenscar-thread.c (_initialize_ravenscar): Use
complete_target_initialization.
* sol-thread.c (_initialize_sol_thread): Use
complete_target_initialization.
* spu-multiarch.c (_initialize_spu_multiarch): Use
complete_target_initialization.
This is another patch in my ongoing series to "split" objfile to share
more read-only data across inferiors. See
http://sourceware.org/gdb/wiki/ObjfileSplitting
When symbols are finally shared, there will be no back-link from the
symbol to its containing objfile, because there may be more than one
such objfile. So, all such back-links must be removed.
One hidden back-link is the msymbol_objfile function. Since
(eventually) a symbol may appear in more than one objfile, trying to
look up the objfile given just a symbol cannot work.
This patch removes msymbol_objfile in favor of using a bound minimal
symbol. It introduces a new function to make this conversion simpler
in some spots.
The bonus of this patch is that using msymbol_objfile is slower than
simply looking up the owning objfile in the first place.
Built and regtested on x86-64 Fedora 18.
* ada-exp.y (write_var_or_type): Use bound_minimal_symbol.
* ada-lang.c (ada_lookup_simple_minsym): Return
bound_minimal_symbol.
* ada-lang.h (ada_lookup_simple_minsym): Update.
* c-exp.y (variable): Use lookup_bound_minimal_symbol.
* f-exp.y (variable): Use lookup_bound_minimal_symbol.
* go-exp.y (variable): Use lookup_bound_minimal_symbol.
* jv-exp.y (push_expression_name): Use lookup_bound_minimal_symbol.
* m2-exp.y (variable): Use lookup_bound_minimal_symbol.
* minsyms.c (msymbol_objfile): Remove.
(lookup_minimal_symbol_internal): New function, from
lookup_minimal_symbol.
(lookup_minimal_symbol): Rewrite using
lookup_minimal_symbol_internal.
(lookup_bound_minimal_symbol): New function.
* minsyms.h (msymbol_objfile): Remove.
(lookup_bound_minimal_symbol): Declare.
* p-exp.y (variable): Use lookup_bound_minimal_symbol.
* parse.c (write_exp_msymbol): Change parameter to a
bound_minimal_symbol.
(write_dollar_variable): Use lookup_bound_minimal_symbol.
* parser-defs.h (write_exp_msymbol): Update.
* printcmd.c (address_info): Use lookup_bound_minimal_symbol.
* symfile.c (simple_read_overlay_table): Use
lookup_bound_minimal_symbol.
* symtab.c (skip_prologue_sal): Don't use msymbol_objfile.
(search_symbols): Likewise.
(print_msymbol_info): Take a bound_minimal_symbol argument.
(symtab_symbol_info, rbreak_command): Update.
* symtab.h (struct symbol_search) <msymbol>: Change type
to bound_minimal_symbol.
* valops.c (find_function_in_inferior): Use
lookup_bound_minimal_symbol.
* value.c (value_fn_field): Use lookup_bound_minimal_symbol.
Code cleanup.
* remote.c (cleanup_sigint_signal_handler): Rename the declaration
to ...
(async_cleanup_sigint_signal_handler): ... this.
(initialize_sigint_signal_handler): Remove declaration.
(handle_remote_sigint): Rename the declaration to ...
(async_handle_remote_sigint): ... this.
(handle_remote_sigint_twice): Rename the declaration to ...
(async_handle_remote_sigint_twice): ... this.
(async_remote_interrupt, async_remote_interrupt_twice)
(remote_interrupt): Remove the declarations.
(remote_interrupt_twice): Rename the declaration ...
(sync_remote_interrupt_twice): ... this.
(sigint_remote_twice_token): Rename the variable to ...
(async_sigint_remote_twice_token): ... this.
(sigint_remote_token): Rename the variable to ...
(async_sigint_remote_token): ... this.
(initialize_sigint_signal_handler): Rename the function to ...
(async_initialize_sigint_signal_handler): ... this. Update the name
inside.
(handle_remote_sigint): Rename the function to ...
(async_handle_remote_sigint): ... this. Update the names inside.
(handle_remote_sigint_twice): Rename the function to ...
(async_handle_remote_sigint_twice): ... this. Update the names inside.
(cleanup_sigint_signal_handler): Rename the function to ...
(async_cleanup_sigint_signal_handler): ... this.
(remote_interrupt): Rename the function to ...
(sync_remote_interrupt): this. Update the names inside.
(remote_interrupt_twice): Rename the function to ...
(sync_remote_interrupt_twice): this. Update the names inside.
(remote_terminal_inferior, remote_terminal_ours, remote_wait_as)
(_initialize_remote): Update the names inside.
This patch fixes PR symtab/15719.
The bug is that "watch -location" crashes on a certain expression.
The problem is that fetch_subexp_value is catching an exception.
For ordinary watchpoints this is ok; but for location watchpoints,
it is better for the exception to propagate.
Built and regtested on x86-64 Fedora 18.
New test case included.
PR symtab/15719:
* breakpoint.c (update_watchpoint, watchpoint_check)
(watch_command_1): Update.
* eval.c (fetch_subexp_value): Add "preserve_errors"
parameter.
* ppc-linux-nat.c (check_condition): Update.
* value.h (fetch_subexp_value): Update.
* gdb.base/watchpoint.c (struct foo5): New.
(nullptr): New global.
* gdb.base/watchpoint.exp (test_watch_location): Add test.
http://sourceware.org/ml/gdb-patches/2013-08/msg00067.html
This call to add_file_handler is a duplicate of one that is in
gdb_setup_readline that is always executed.
gdb/ChangeLog
* mi/mi-interp.c (mi_interpreter_resume): Remove call to
add_file_handler.
* dwarf2read.c (struct dwarf2_per_cu_data): New member tu_read.
(fill_in_sig_entry_from_dwo_entry): Reorganize asserts.
Add assert of sig_entry->dwo_unit == NULL.
(lookup_dwo_signatured_type): Don't assign TU to a DWO if the TU
had already been read.
(read_signatured_type): Set per_cu.tu_read.
testsuite/
* gdb.dwarf2/fission-mix.exp: New file.
* gdb.dwarf2/fission-mix.h: New file.
* gdb.dwarf2/fission-mix.c: New file.
* gdb.dwarf2/fission-mix2.c: New file.
effectively, struct symbol_search **.
(make_cleanup_free_search_symbols): Change arg to struct
symbol_search **. All callers updated.
(compare_search_syms): Compare symtab file name and block as well.
(search_symbols_equal): New function.
(sort_search_symbols_remove_dups): Renamed from sort_search_symbols.
New args new_head, new_tail. Result is now void. Remove dups after
sorting the symbols.
(search_symbols): Sort all found symbols once, after all have been
found, and remove duplicates. Simplify cleanup tracking of result.
* symtab.h (make_cleanup_free_search_symbols): Update prototype.
* dwarf2read.c (recursively_compute_inclusions): Change type of result
parameter to VEC (symtab_ptr) **. New parameter all_type_symtabs.
Watch for duplicate symtabs coming from type units.
(compute_symtab_includes): Update call to
recursively_compute_inclusions. Build vector of included symtabs
instead of per_cus.
* symtab.h (symtab_ptr): New typedef.
(DEF_VEC_P (symtab_ptr)): New VEC type.
* linespec.c (symtab_p): Delete. All uses updated to use symtab_ptr
instead.
http://sourceware.org/ml/gdb-patches/2013-07/msg00777.html
gdb/ChangeLog
* remote-mips.c (mips_error): Replace use of
deprecated_throw_reason with throw_verror. Use the error message
passed to mips_error as the error message for throw_verror.
* tracepoint.c (trace_dump_command): Select the current frame.
gdb/testsuite/
* gdb.trace/backtrace.exp (gdb_backtrace_tdp_4): Test command
'tdump' on stack frame 0 and 1 respectively.
http://sourceware.org/ml/gdb-patches/2013-07/msg00317.html
gdb/ChangeLog
* value.c (value_fetch_lazy): Mark optimized out values as such
rather than raising an error.
gdb/testsuite/ChangeLog
* gdb.dwarf2/pieces-optimized-out.exp: Expect "<optimized out>"
when printing an optimized out value. Expect an error when using
an optimized out value in an expression.
http://sourceware.org/ml/gdb-patches/2013-07/msg00316.html
gdb/ChangeLog
* value.c (value_fetch_lazy): Ensure parent value is not lazy
before checking which bits of the parent, not the child, value are
valid.
gdb/testsuite/ChangeLog
* gdb.dwarf2/pieces-optimized-out.exp: New file.
* gdb.dwarf2/pieces-optimized-out.c: New file.
* gdb.dwarf2/pieces-optimized-out.S: New file.
PR gdb/15715
* top.c: Include "filenames.h".
(set_history_filename): New function.
(init_main): Install it as set hook of the "set history filename"
command.
2013-07-30 Muhammad Bilal <mbilal@codesourcery.com>
PR gdb/15715
* gdb.base/setshow.exp: Test that relative paths passed to
'set history filename' are converted to absolute paths.
* Makefile.in (SFILES): Add common/mips-linux-watch.c.
(mips-linux-watch.o): New rule.
(mips_linux_watch_h): New variable.
* configure.srv <mips*-*-linux*>: Add mips-linux-watch.o to
srv_tgtobj.
* linux-mips-low.c: Include mips-linux-watch.h.
(struct arch_process_info, struct arch_lwp_info): New.
(update_watch_registers_callback): New function.
(mips_linux_new_process, mips_linux_new_thread) New functions.
(mips_linux_prepare_to_resume, mips_insert_point): New
functions.
(mips_remove_point, mips_stopped_by_watchpoint): New
functions.
(rsp_bp_type_to_target_hw_bp_type): New function.
(mips_stopped_data_address): New function.
(the_low_target): Add watchpoint support functions.
gdb/
* NEWS: Mention that GDBserver now supports hardware
watchpoints on the MIPS GNU/Linux target.
* mips-linux-nat.c (get_irw_mask): Rename to ...
(mips_linux_watch_get_irw_mask): ... this. Rename parameter
'set' to 'n'. Update function comment. All callers changed.
(get_reg_mask): Rename parameter 'set' to 'n'. Update
function comment. All callers changed.
(get_num_valid): Rename to ...
(mips_linux_watch_get_num_valid): ... this. Rename parameter
'set' to 'n'. Update function comment. All callers changed.
(get_watchlo): Rename to ...
(mips_linux_watch_get_watchlo): ... this. Rename parameter
'set' to 'n'. Update function comment. All callers changed.
(set_watchlo): Rename to ...
(mips_linux_watch_set_watchlo): ... this. Rename parameter
'set' to 'n'. Update function comment. All callers changed.
(get_watchhi): Rename to ...
(mips_linux_watch_get_watchhi): ... this. Update function
comment. All callers changed.
(set_watchhi): Rename to ...
(mips_linux_watch_set_watchhi): ... this. Update function
comment. All callers changed.
(mips_linux_read_watch_registers): Update function comment.
Add new parameters 'lwpid', 'watch_readback', and
'watch_readback_valid'. Update.
(type_to_irw): Rename to ...
(mips_linux_watch_type_to_irw): ... this. Update function
comment. All callers changed.
(fill_mask): Update function comment.
(try_one_watch): Rename to ...
(mips_linux_watch_try_one_watch): ... this. Change the type
of parameter 'irw' from 'unsigned' to 'uint32_t'.
(populate_regs_from_watches): Rename to ...
(mips_linux_watch_populate_regs): ... this. Add parameter
'current_watches'. All callers changed.
When GDB is run with IO redirected to a pipe, the 'interrupt' command
causes it to kill its own process group instead of the inferior's.
The problem manifests itself in async mode, native debugging:
$ cat | gdb <file>
(gdb) set target-async on
(gdb) run &
(gdb) interrupt
A debugging session is active.
Inferior 1 [process 20584] will be killed.
Quit anyway? (y or n) [answered Y; input not from terminal]
In this case, GDB tells that its stdin isn't a tty and doesn't save
the inferior's process group in
inflow.c:terminal_init_inferior_with_pgrp. The 'interrupt' command
tries to 'kill' the inferior's process group in
`inf-ptrace.c:inf_ptrace_stop`, but since that wasn't saved in the
first place, GDB kills process group 0, meaning, its own process
group.
When GDB is used from a frontend, that means killing its own process
group including the frontend and possibly the X session. This was
originally seen with SublimeGDB:
https://github.com/quarnster/SublimeGDB/issues/29.
The patch makes GDB save the inferior pgid regardless of having a
terminal, as pgid is used not only to reset foreground process group,
but also to interrupt the inferior process. It also adds a regression
test. Luckily, we can emulate not having a terminal with "set
interactive-mode off", avoiding the need of special magic to spawn gdb
with a pipe.
Tested on x86_64 Fedora 17.
gdb/
2013-07-26 Cyril Nikolaev <cyril@nichtverstehen.de>
* inflow.c (terminal_init_inferior_with_pgrp): Save inferior
process group regardless of having tty on stdin.
gdb/testsuite/
2013-07-26 Pedro Alves <palves@redhat.com>
* gdb.base/interrupt-noterm.c, gdb.base/interrupt-noterm.exp: New
files.
This patch fixes the target double-close problem (PR remote/15266),
and in the process removes pop_target entire (PR remote/15256).
The first issue is that pop_target calls target_close. However, it
then calls unpush_target, which also calls target_close. This means
targets must be able to be closed twice. Not only is this strange,
but it also directly contradicts the contract of to_xclose targets.
(We currently have just a single such target, and it is never pushed;
but I plan to add more, and so this latent bug is triggered.)
The second issue is that it seems to me that calling pop_target is
often unsafe. This is what cropped up in 15256, where the remote
target assumed that it could pop_target -- but there was another
target higher on the stack, leading to confusion.
But, it is always just as easy to call unpush_target as it is to call
pop_target; and it is also safer. So, removing pop_target seemed like
an improvement.
Finally, this adds an assertion to target_close to ensure that no
currently-pushed target can be closed.
Built and regtested on x86-64 Fedora 18; both natively and using the
native-gdbserver board file.
PR remote/15256, PR remote/15266:
* bfd-target.c (target_bfd_reopen): Initialize to_magic.
* monitor.c (monitor_detach): Use unpush_target.
* remote-m32r-sdi.c (m32r_detach): Use unpush_target.
* remote-mips.c (mips_detach): Use unpush_target. Don't
call mips_close.
* remote-sim.c (gdbsim_detach): Use unpush_target.
* target.c (pop_target): Remove.
(pop_all_targets_above): Don't call target_close.
(target_close): Assert that the target is unpushed.
* target.h (pop_target): Don't declare.
* tracepoint.c (tfile_open): Use unpush_target.
Right now, "help target" will include this line:
target multi-thread -- Threads and pthreads support
However, it doesn't make sense to invoke "target multi-thread".
This patch fixes the problem by not registering the multi-thread
target. add_target does some needed initialization of the target_ops,
so I broke this out into a new function.
It isn't clear to me whether this patch requires a test case or not.
I'm not sure whether there are other unregistered targets; but if
there are, it seems unlikely that we test for their absence from the
help.
Built and regtested on x86-64 Fedora 18.
* linux-thread-db.c (init_thread_db_ops): Call
complete_target_initialization.
(_initialize_thread_db): Don't call add_target.
* target.c (complete_target_initialization): New function.
(add_target_with_completer): Call it.
* target.h (complete_target_initialization): Declare.
* hppa-tdep.h (enum hppa_regnum): Add members for all space registers.
* hppaobsd-tdep.c (HPPAOBSD_SIZEOF_GREGS): Add comment.
(HPPANBSD_SIZEOF_GREGS): New define.
(hppaobsd_supply_gregset): Handle additional registers.
* hppabsd-nat.c (hppabsd_gregset_supplies_p): Adjust to indicate
we provide more registers now.
(hppabsd_supply_gregset): Supply additional registers.
(hppabsd_collect_gregset): Collect additional registers.
http://sourceware.org/ml/gdb-patches/2013-07/msg00236.html
gdb/ChangeLog
* mi/mi-main.c (output_register): Make MI 'r' format use standard
'z' format code. Remove error for optimized out values, standard
code will handle these fine.
gdb/testsuite/ChangeLog
* gdb.mi/mi-reg-undefined.exp: New file.
* gdb.mi/mi-reg-undefined.c: Likewise.
* gdb.mi/mi-reg-undefined.S: Likewise.
http://sourceware.org/ml/gdb-patches/2013-07/msg00235.html
gdb/ChangeLog
* NEWS: Mention new 'z' formatter.
* printcmd.c (print_scalar_formatted): Add new 'z' formatter.
(_initialize_printcmd): Mention 'z' formatter in help text of the
'x' command.
gdb/doc/ChangeLog
* gdb.texinfo (Output Formats): Mention the new 'z' formatter.
gdb/testsuite/ChangeLog
* gdb.base/printcmds.exp (test_print_int_arrays): Add tests for x,
z, o, and t output formats.
* gdb.base/display.exp: Use 'k' as an undefined format now that
'z' is defined.
* breakpoint.c (create_longjmp_master_breakpoint): Check if probe
interface can evaluate arguments. Fallback to the old mode if it
cannot.
(create_exception_master_breakpoint): Likewise.
* elfread.c (elf_can_evaluate_probe_arguments): New function.
(struct sym_probe_fns elf_probe_fns): Export function above to the
probe interface.
* probe.c (can_evaluate_probe_arguments): New function.
* probe.h (struct probe_ops) <can_evaluate_probe_arguments>: New
function pointer.
(can_evaluate_probe_arguments): New function prototype.
* solib-svr4.c (svr4_create_solib_event_breakpoints): Check if
probe interface can evaluate arguments. Fallback to the old mode
if it cannot.
* stap-probe.c (stap_get_probe_argument_count): Check if probe
interface can evaluate arguments. Warning the user if it cannot.
(stap_can_evaluate_probe_arguments): New function.
(struct probe_ops stap_probe_ops): Export function above to the
probe interface.
* symfile.h (struct sym_probe_fns) <can_evaluate_probe_arguments>:
New function pointer.
init_cutu_and_read_dies creates an outer cleanup and uses its
immediately nested inner cleanup conditionally. This seems overly
complicated to me; simpler is to just deal with the outer cleanup and
drop the inner one. That is what this patch implements.
* dwarf2read.c (init_cutu_and_read_dies): Remove 'free_cu_cleanup'.
Simplify cleanup handling.
dwarf_decode_line_header has one return that is missing a call to
do_cleanups. This patch adds it.
This was found using the cleanup checker.
* dwarf2read.c (dwarf_decode_line_header): Call do_cleanups
on all return paths.
* ppc-linux-nat.c (PPC_DEBUG_FEATURE_DATA_BP_DAWR): New define.
(ppc_linux_region_ok_for_hw_watchpoint): Add checking to use the new
DAWR interface for longer ranges hardware watchpoint (up to 512 bytes).
http://sourceware.org/ml/gdb-patches/2013-07/msg00322.html
gdb/ChangeLog
* common/format.c (parse_format_string): Add checks for NULL
character before calling strchr.
gdb/testsuite/ChangeLog
* gdb.base/printcmds.exp (test_printf): Add tests for format
strings with missing format specifier.
* ppc-linux-nat.c: Since the new PowerPC specific ptrace interface is
now available for embedded (BookE) and server (BookS) processors,
correct mentions of 'booke' and adjust comments accordingly in order to
avoid confusion. Rename struct 'booke_debug_info' to 'hwdebug_info'.
(have_ptrace_booke_interface): Rename function and variable
'have_ptrace_booke_interface' to 'have_ptrace_hwdebug_interface'.
Rename struct 'booke_debug_info' to 'hwdebug_info'. Update all uses.
(booke_cmp_hw_point): Rename function 'booke_cmp_hw_point' to
'hwdebug_point_cmp'. Update all uses.
(booke_find_thread_points_by_tid): Rename function
'booke_find_thread_points_by_tid' to
'hwdebug_find_thread_points_by_tid'. Update all uses.
(booke_insert_point): Rename function 'booke_insert_point' to
'hwdebug_insert_point'. Update all uses.
(booke_remove_point): Rename function 'booke_remove_point' to
'hwdebug_remove_point'. Update all uses.
PR threads/13217
* thread.c (thread_apply_all_command): Check for valid threads
and thread count.
(thread_array_cleanup): New struct.
(set_thread_refcount): New function.
