A recent change to glibc removed asm/ptrace.h from user.h for AArch64.
This meant that cross-native builds of gdbserver using trunk glibc broke
because linux-aarch64-low.c because user_hwdebug_state couldn't be found.
This is like commit #036cd38182bde32d8297b630cd5c861d53b8949e
2014-05-23 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
* linux-aarch64-low.c (asm/ptrace.h): Include.
When loading symbols for the vdso, also add its sections to target_sections.
This fixes an issue with record btrace where vdso instructions could not be
disassembled during replay.
* symfile-mem.c (symbol_file_add_from_memory): Add BFD sections.
testsuite/
* gdb.btrace/vdso.c: New.
* gdb.btrace/vdso.exp: New.
Allow gcore's capture_command_output function to be used by other tests.
testsuite/
* gdb.base/gcore.exp (capture_command_output): Move ...
* lib/gdb.exp (capture_command_output): ... here.
The btrace record target does not trace data. We therefore do not allow
accessing read-write memory during replay.
In some cases, this might be useful to advanced users, though, who we assume
to know what they are doing.
Add a set|show command pair to turn this memory access restriction off.
* record-btrace.c (record_btrace_allow_memory_access): Remove.
(replay_memory_access_read_only, replay_memory_access_read_write)
(replay_memory_access_types, replay_memory_access)
(set_record_btrace_cmdlist, show_record_btrace_cmdlist)
(cmd_set_record_btrace, cmd_show_record_btrace)
(cmd_show_replay_memory_access): New.
(record_btrace_xfer_partial, record_btrace_insert_breakpoint)
(record_btrace_remove_breakpoint): Replace
record_btrace_allow_memory_access with replay_memory_access.
(_initialize_record_btrace): Add commands.
* NEWS: Announce it.
testsuite/
* gdb.btrace/data.exp: Test it.
doc/
* gdb.texinfo (Process Record and Replay): Document it.
It should clear up confusion about the args parameter to mi_run_cmd_full.
Thanks to Joel for clear formulation. I also added a comment about the
impact of use_gdb_stub.
gdb/testsuite/ChangeLog:
2014-05-22 Simon Marchi <simon.marchi@ericsson.com>
* lib/mi-support.exp (mi_run_cmd_full): Add comments.
A recent change to glibc removed asm/ptrace.h from user.h for
AArch64. This meant that cross-native builds of gdb using trunk
glibc broke because aarch64-linux-nat.c because user_hwdebug_state
couldn't be found.
Fixed by including asm/ptrace.h like other ports.
2014-05-22 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
* aarch64-linux-nat.c (asm/ptrace.h): Include.
Move infrun.c declarations out of inferior.h to a new infrun.h file.
Tested by building on:
i686-w64-mingw32, enable-targets=all
x86_64-linux, enable-targets=all
i586-pc-msdosdjgpp
And also grepped the whole tree for each symbol moved to find where
infrun.h might be necessary.
gdb/
2014-05-22 Pedro Alves <palves@redhat.com>
* inferior.h (debug_infrun, debug_displaced, stop_on_solib_events)
(sync_execution, sched_multi, step_stop_if_no_debug, non_stop)
(disable_randomization, enum exec_direction_kind)
(execution_direction, stop_registers, start_remote)
(clear_proceed_status, proceed, resume, user_visible_resume_ptid)
(wait_for_inferior, normal_stop, get_last_target_status)
(prepare_for_detach, fetch_inferior_event, init_wait_for_inferior)
(insert_step_resume_breakpoint_at_sal)
(follow_inferior_reset_breakpoints, stepping_past_instruction_at)
(set_step_info, print_stop_event, signal_stop_state)
(signal_print_state, signal_pass_state, signal_stop_update)
(signal_print_update, signal_pass_update)
(update_signals_program_target, clear_exit_convenience_vars)
(displaced_step_dump_bytes, update_observer_mode)
(signal_catch_update, gdb_signal_from_command): Move
declarations ...
* infrun.h: ... to this new file.
* amd64-tdep.c: Include infrun.h.
* annotate.c: Include infrun.h.
* arch-utils.c: Include infrun.h.
* arm-linux-tdep.c: Include infrun.h.
* arm-tdep.c: Include infrun.h.
* break-catch-sig.c: Include infrun.h.
* breakpoint.c: Include infrun.h.
* common/agent.c: Include infrun.h instead of inferior.h.
* corelow.c: Include infrun.h.
* event-top.c: Include infrun.h.
* go32-nat.c: Include infrun.h.
* i386-tdep.c: Include infrun.h.
* inf-loop.c: Include infrun.h.
* infcall.c: Include infrun.h.
* infcmd.c: Include infrun.h.
* infrun.c: Include infrun.h.
* linux-fork.c: Include infrun.h.
* linux-nat.c: Include infrun.h.
* linux-thread-db.c: Include infrun.h.
* monitor.c: Include infrun.h.
* nto-tdep.c: Include infrun.h.
* procfs.c: Include infrun.h.
* record-btrace.c: Include infrun.h.
* record-full.c: Include infrun.h.
* remote-m32r-sdi.c: Include infrun.h.
* remote-mips.c: Include infrun.h.
* remote-notif.c: Include infrun.h.
* remote-sim.c: Include infrun.h.
* remote.c: Include infrun.h.
* reverse.c: Include infrun.h.
* rs6000-tdep.c: Include infrun.h.
* s390-linux-tdep.c: Include infrun.h.
* solib-irix.c: Include infrun.h.
* solib-osf.c: Include infrun.h.
* solib-svr4.c: Include infrun.h.
* target.c: Include infrun.h.
* top.c: Include infrun.h.
* windows-nat.c: Include infrun.h.
* mi/mi-interp.c: Include infrun.h.
* mi/mi-main.c: Include infrun.h.
* python/py-threadevent.c: Include infrun.h.
A small cleanup - so we can call the print routine without affecting
--return-child-result.
gdb/
2014-05-22 Pedro Alves <palves@redhat.com>
* infrun.c (handle_inferior_event): Store the exit code for
--return-child-result here, instead of ...
(print_exited_reason): ... here.
The other part of PR gdb/13860 is about console execution commands in
MI getting their output half lost. E.g., take the finish command,
executed on a frontend's GDB console:
sync:
finish
&"finish\n"
~"Run till exit from #0 usleep (useconds=10) at ../sysdeps/unix/sysv/linux/usleep.c:27\n"
^running
*running,thread-id="1"
(gdb)
~"0x00000000004004d7 in foo () at stepinf.c:6\n"
~"6\t usleep (10);\n"
~"Value returned is $1 = 0\n"
*stopped,reason="function-finished",frame={addr="0x00000000004004d7",func="foo",args=[],file="stepinf.c",fullname="/home/pedro/gdb/tests/stepinf.c",line="6"},thread-id="1",stopped-threads="all",core="1"
async:
finish
&"finish\n"
~"Run till exit from #0 usleep (useconds=10) at ../sysdeps/unix/sysv/linux/usleep.c:27\n"
^running
*running,thread-id="1"
(gdb)
*stopped,reason="function-finished",frame={addr="0x00000000004004d7",func="foo",args=[],file="stepinf.c",fullname="/home/pedro/gdb/tests/stepinf.c",line="6"},gdb-result-var="$1",return-value="0",thread-id="1",stopped-threads="all",core="0"
Note how all the "Value returned" etc. output is missing in async mode.
The same happens with e.g., catchpoints:
=breakpoint-modified,bkpt={number="1",type="catchpoint",disp="keep",enabled="y",what="22016",times="1"}
~"\nCatchpoint "
~"1 (forked process 22016), 0x0000003791cbd8a6 in __libc_fork () at ../nptl/sysdeps/unix/sysv/linux/fork.c:131\n"
~"131\t pid = ARCH_FORK ();\n"
*stopped,reason="fork",disp="keep",bkptno="1",newpid="22016",frame={addr="0x0000003791cbd8a6",func="__libc_fork",args=[],file="../nptl/sysdeps/unix/sysv/linux/fork.c",fullname="/usr/src/debug/glibc-2.14-394-g8f3b1ff/nptl/sysdeps/unix/sysv/linux/fork.c",line="131"},thread-id="1",stopped-threads="all",core="0"
where all those ~ lines are missing in async mode, or just the "step"
current line indication:
s
&"s\n"
^running
*running,thread-id="all"
(gdb)
~"13\t foo ();\n"
*stopped,frame={addr="0x00000000004004ef",func="main",args=[{name="argc",value="1"},{name="argv",value="0x7fffffffdd78"}],file="stepinf.c",fullname="/home/pedro/gdb/tests/stepinf.c",line="13"},thread-id="1",stopped-threads="all",core="3"
(gdb)
Or in the case of the PRs example, the "Stopped due to shared library
event" note:
start
&"start\n"
~"Temporary breakpoint 1 at 0x400608: file ../../../src/gdb/testsuite/gdb.mi/solib-main.c, line 21.\n"
=breakpoint-created,bkpt={number="1",type="breakpoint",disp="del",enabled="y",addr="0x0000000000400608",func="main",file="../../../src/gdb/testsuite/gdb.mi/solib-main.c",fullname="/home/pedro/gdb/mygit/src/gdb/testsuite/gdb.mi/solib-main.c",line="21",times="0",original-location="main"}
~"Starting program: /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/solib-main \n"
=thread-group-started,id="i1",pid="21990"
=thread-created,id="1",group-id="i1"
^running
*running,thread-id="all"
(gdb)
=library-loaded,id="/lib64/ld-linux-x86-64.so.2",target-name="/lib64/ld-linux-x86-64.so.2",host-name="/lib64/ld-linux-x86-64.so.2",symbols-loaded="0",thread-group="i1"
~"Stopped due to shared library event (no libraries added or removed)\n"
*stopped,reason="solib-event",thread-id="1",stopped-threads="all",core="3"
(gdb)
IMO, if you're typing execution commands in a frontend's console, you
expect to see their output. Indeed it's what you get in sync mode. I
think async mode should do the same. Deciding what to mirror to the
console wrt to breakpoints and random stops gets messy real fast.
E.g., say "s" trips on a breakpoint. We'd clearly want to mirror the
event to the console in this case. But what about more complicated
cases like "s&; thread n; s&", and one of those steps spawning a new
thread, and that thread hitting a breakpoint? It's impossible in
general to track whether the thread had any relation to the commands
that had been executed. So I think we should just simplify and always
mirror breakpoints and random events to the console.
Notes:
- mi->out is the same as gdb_stdout when MI is the current
interpreter. I think that referring to that directly is cleaner.
An earlier revision of this patch made the changes that are now
done in mi_on_normal_stop directly in infrun.c:normal_stop, and so
not having an obvious place to put the new uiout by then, and not
wanting to abuse CLI's uiout, I made a temporary uiout when
necessary.
- Hopefuly the rest of the patch is more or less obvious given the
comments added.
Tested on x86_64 Fedora 20, no regressions.
2014-05-21 Pedro Alves <palves@redhat.com>
PR gdb/13860
* gdbthread.h (struct thread_control_state): New field
`command_interp'.
* infrun.c (follow_fork): Copy the new thread control field to the
child fork thread.
(clear_proceed_status_thread): Clear the new thread control field.
(proceed): Set the new thread control field.
* interps.h (command_interp): Declare.
* interps.c (command_interpreter): New global.
(command_interp): New function.
(interp_exec): Set `command_interpreter' while here.
* cli-out.c (cli_uiout_dtor): New function.
(cli_ui_out_impl): Install it.
* mi/mi-interp.c: Include cli-out.h.
(mi_cmd_interpreter_exec): Add comment.
(restore_current_uiout_cleanup): New function.
(ui_out_free_cleanup): New function.
(mi_on_normal_stop): If finishing an execution command started by
a CLI command, or any kind of breakpoint-like event triggered,
print the stop event to the output (CLI) stream.
* mi/mi-out.c (mi_ui_out_impl): Install NULL `dtor' handler.
2014-05-21 Pedro Alves <palves@redhat.com>
PR gdb/13860
* gdb.mi/mi-cli.exp (line_callee4_next_step): New global.
(top level): Test that output related to execution commands is
sent to the console with CLI commands, but not with MI commands.
Test that breakpoint events are always mirrored to the console.
Also expect the new source line to be output after a "next" in
async mode too. Make it a pass/fail test.
* gdb.mi/mi-solib.exp: Test that the CLI solib event note is
output.
* lib/mi-support.exp (mi_gdb_expect_cli_output): New procedure.
I noticed that "list" behaves differently in CLI vs MI. Particularly:
$ ./gdb -nx -q ./testsuite/gdb.mi/mi-cli
Reading symbols from /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/mi-cli...done.
(gdb) start
Temporary breakpoint 1 at 0x40054d: file ../../../src/gdb/testsuite/gdb.mi/basics.c, line 62.
Starting program: /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/mi-cli
Temporary breakpoint 1, main () at ../../../src/gdb/testsuite/gdb.mi/basics.c:62
62 callee1 (2, "A string argument.", 3.5);
(gdb) list
57 {
58 }
59
60 main ()
61 {
62 callee1 (2, "A string argument.", 3.5);
63 callee1 (2, "A string argument.", 3.5);
64
65 do_nothing (); /* Hello, World! */
66
(gdb)
Note the list started at line 57. IOW, the program stopped at line
62, and GDB centered the list on that.
compare with:
$ ./gdb -nx -q ./testsuite/gdb.mi/mi-cli -i=mi
=thread-group-added,id="i1"
~"Reading symbols from /home/pedro/gdb/mygit/build/gdb/testsuite/gdb.mi/mi-cli..."
~"done.\n"
(gdb)
start
&"start\n"
...
~"\nTemporary breakpoint "
~"1, main () at ../../../src/gdb/testsuite/gdb.mi/basics.c:62\n"
~"62\t callee1 (2, \"A string argument.\", 3.5);\n"
*stopped,reason="breakpoint-hit",disp="del",bkptno="1",frame={addr="0x000000000040054d",func="main",args=[],file="../../../src/gdb/testsuite/gdb.mi/basics.c",fullname="/home/pedro/gdb/mygit/src/gdb/testsuite/gdb.mi/basics.c",line="62"},thread-id="1",stopped-threads="all",core="0"
=breakpoint-deleted,id="1"
(gdb)
-interpreter-exec console list
~"62\t callee1 (2, \"A string argument.\", 3.5);\n"
~"63\t callee1 (2, \"A string argument.\", 3.5);\n"
~"64\t\n"
~"65\t do_nothing (); /* Hello, World! */\n"
~"66\t\n"
~"67\t callme (1);\n"
~"68\t callme (2);\n"
~"69\t\n"
~"70\t return 0;\n"
~"71\t}\n"
^done
(gdb)
Here the list starts at line 62, where the program was stopped.
This happens because print_stack_frame, called from both normal_stop
and mi_on_normal_stop, is the function responsible for setting the
current sal from the selected frame, overrides the PRINT_WHAT
argument, and only after that does it decide whether to center the
current sal line or not, based on the overridden value, and it will
always decide false.
(The print_stack_frame call in mi_on_normal_stop is a little different
from the call in normal_stop, in that it is an unconditional
SRC_AND_LOC call. A future patch will make those uniform.)
A previous version of this patch made MI uniform with CLI here, by
making print_stack_frame also center when MI is active. That changed
the output of a "list" command in mi-cli.exp, to expect line 57
instead of 62, as per the example above.
However, looking deeper, that list in question is the first "list"
after the program stops, and right after the stop, before the "list",
the test did "set listsize 1". Let's try the same thing with the CLI:
(gdb) start
62 callee1 (2, "A string argument.", 3.5);
(gdb) set listsize 1
(gdb) list
57 {
Huh, that's unexpected. Why the 57? It's because print_stack_frame,
called in reaction to the breakpoint stop, expecting the next "list"
to show 10 lines (the listsize at the time) around line 62, sets the
lines listed range to 57-67 (62 +/- 5). If the user changes the
listsize before "list", why would we still show that range? Looks
bogus to me.
So the fix for this whole issue should be delay trying to center the
listing to until actually listing, so that the correct listsize can be
taken into account. This makes MI and CLI uniform too, as it deletes
the center code from print_stack_frame.
A series of tests are added to list.exp to cover this. mi-cli.exp was
after all correct all along, but it now gains an additional test that
lists lines with listsize 10, to ensure the centering is consistent
with CLI's.
One related Python test changed related output -- it's a test that
prints the line number after stopping for a breakpoint, similar to the
new list.exp tests. Previously we'd print the stop line minus 5 (due
to the premature centering), now we print the stop line. I think
that's a good change.
Tested on x86_64 Fedora 20.
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* cli/cli-cmds.c (list_command): Handle the first "list" after the
current source line having changed.
* frame.h (set_current_sal_from_frame): Remove 'center' parameter.
* infrun.c (normal_stop): Adjust call to
set_current_sal_from_frame.
* source.c (clear_lines_listed_range): New function.
(set_current_source_symtab_and_line, identify_source_line): Clear
the lines listed range.
(line_info): Handle the first "info line" after the current source
line having changed.
* stack.c (print_stack_frame): Remove center handling.
(set_current_sal_from_frame): Remove 'center' parameter. Don't
center sal.line.
gdb/testsuite/
2014-05-21 Pedro Alves <palves@redhat.com>
* gdb.base/list.exp (build_pattern, test_list): New procedures.
Use them to test variations of "list" after reaching a breakpoint.
* gdb.mi/mi-cli.exp (line_main_callme_2): New global.
Test "list" with listsize 10 after reaching a breakpoint.
* gdb.python/python.exp (decode_line current location line
number): Adjust expected line number.
This reverts commit 8c217a4b68.
Following this
https://sourceware.org/ml/gdb-patches/2014-05/msg00462.html
I suggest reverting my previous commit. I will follow with another
patch to add comments, to clarify some things as stated in the mail
thread.
I ran make check with on gdb.mi, and the test that the commit broke
passes again.
gdb/testsuite/ChangeLog:
2014-05-21 Simon Marchi <simon.marchi@ericsson.com>
* lib/mi-support.exp (mi_run_cmd_full): Revert to original
behavior for $args, pass it directly to "run".
Most ports do the same thing in the tail of their mourn routine - call
generic_mourn_inferior+inf_child_maybe_unpush_target.
This factors that out to a convenience function. More could be done,
but this converts only the really obvious ones.
Tested by building GDB on x86_64 Fedora 20, mingw32 and djgpp. The
rest is untested, but I think a patch can't get more obvious.
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* inf-child.c (inf_child_mourn_inferior): New function.
* inf-child.h (inf_child_mourn_inferior): New declaration.
* darwin-nat.c (darwin_mourn_inferior): Use
inf_child_mourn_inferior.
* gnu-nat.c (gnu_mourn_inferior): Likewise.
* inf-ptrace.c (inf_ptrace_mourn_inferior): Likewise.
* inf-ttrace.c (inf_ttrace_mourn_inferior): Likewise.
* nto-procfs.c (procfs_mourn_inferior): Likewise.
* windows-nat.c (windows_mourn_inferior): Likewise.
This fixes:
PASS: gdb.base/info-macros.exp: info macro -a -- FOO
ERROR: internal buffer is full.
UNRESOLVED: gdb.base/info-macros.exp: info macros 2
ERROR: internal buffer is full.
UNRESOLVED: gdb.base/info-macros.exp: info macros 3
ERROR: internal buffer is full.
UNRESOLVED: gdb.base/info-macros.exp: info macros 4
FAIL: gdb.base/info-macros.exp: info macros *$pc
ERROR: internal buffer is full.
UNRESOLVED: gdb.base/info-macros.exp: next
FAIL: gdb.base/info-macros.exp: info macros
ERROR: internal buffer is full.
UNRESOLVED: gdb.base/info-macros.exp: next
FAIL: gdb.base/info-macros.exp: info macros 6
ERROR: internal buffer is full.
UNRESOLVED: gdb.base/info-macros.exp: next
FAIL: gdb.base/info-macros.exp: info macros 7
ERROR: internal buffer is full.
UNRESOLVED: gdb.base/info-macros.exp: info macros info-macros.c:42 (PRMS
gdb/NNNN)
with the arm-eabi target tested on the i686-mingw32 host where GCC
defines enough macros to exhaust expect's 30000 characters of buffer
space.
* lib/gdb.exp (default_gdb_init): Bump `match_max' up from
30000 to 65536.
Sometimes it's useful to be able to disable the automatic connection
to the native target. E.g., sometimes GDB disconnects from the
extended-remote target I was debugging, without me noticing it, and
then I do "run". That starts the program locally, and only after a
little head scratch session do I figure out the program is running
locally instead of remotely as intended. Same thing with "attach",
"info os", etc.
With the patch, we now can have this instead:
(gdb) set auto-connect-native-target off
(gdb) target extended-remote :9999
...
*gdb disconnects*
(gdb) run
Don't know how to run. Try "help target".
To still be able to connect to the native target with
auto-connect-native-target set to off, I've made "target native" work
instead of erroring out as today.
Before:
(gdb) target native
Use the "run" command to start a native process.
After:
(gdb) target native
Done. Use the "run" command to start a process.
(gdb) maint print target-stack
The current target stack is:
- native (Native process)
- exec (Local exec file)
- None (None)
(gdb) run
Starting program: ./a.out
...
I've also wanted this for the testsuite, when running against the
native-extended-gdbserver.exp board (runs against gdbserver in
extended-remote mode). With a non-native-target board, it's always a
bug to launch a program with the native target. Turns out we still
have one such case this patch catches:
(gdb) break main
Breakpoint 1 at 0x4009e5: file ../../../src/gdb/testsuite/gdb.base/coremaker.c, line 138.
(gdb) run
Don't know how to run. Try "help target".
(gdb) FAIL: gdb.base/corefile.exp: run: with core
On the patch itself, probably the least obvious bit is the need to go
through all targets, and move the unpush_target call to after the
generic_mourn_inferior call instead of before. This is what
inf-ptrace.c does too, ever since multi-process support was added.
The reason inf-ptrace.c does things in that order is that in the
current multi-process/single-target model, we shouldn't unpush the
target if there are still other live inferiors being debugged. The
check for that is "have_inferiors ()" (a misnomer nowadays...), which
does:
have_inferiors (void)
{
for (inf = inferior_list; inf; inf = inf->next)
if (inf->pid != 0)
return 1;
It's generic_mourn_inferior that ends up clearing inf->pid, so we need
to call it before the have_inferiors check. To make all native
targets behave the same WRT to explicit "target native", I've added an
inf_child_maybe_unpush_target function that targets call instead of
calling unpush_target directly, and as that includes the
have_inferiors check, I needed to adjust the targets.
Tested on x86_64 Fedora 20, native, and also with the
extended-gdbserver board.
Confirmed a cross build of djgpp gdb still builds.
Smoke tested a cross build of Windows gdb under Wine.
Untested otherwise.
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* inf-child.c (inf_child_ops, inf_child_explicitly_opened): New
globals.
(inf_child_open_target): New function.
(inf_child_open): Use inf_child_open_target to push the target
instead of erroring out.
(inf_child_disconnect, inf_child_close)
(inf_child_maybe_unpush_target): New functions.
(inf_child_target): Install inf_child_disconnect and
inf_child_close. Store a pointer to the returned object.
* inf-child.h (inf_child_open_target, inf_child_maybe_unpush): New
declarations.
* target.c (auto_connect_native_target): New global.
(show_default_run_target): New function.
(find_default_run_target): Return NULL if automatically connecting
to the native target is disabled.
(_initialize_target): Install set/show auto-connect-native-target.
* NEWS: Mention "set auto-connect-native-target", and "target
native".
* linux-nat.c (super_close): New global.
(linux_nat_close): Call super_close.
(linux_nat_add_target): Store a pointer to the base class's
to_close method.
* inf-ptrace.c (inf_ptrace_mourn_inferior, inf_ptrace_detach): Use
inf_child_maybe_unpush.
* inf-ttrace.c (inf_ttrace_him): Don't push the target if it is
already pushed.
(inf_ttrace_mourn_inferior): Only unpush the target after mourning
the inferior. Use inf_child_maybe_unpush_target.
(inf_ttrace_attach): Don't push the target if it is already
pushed.
(inf_ttrace_detach): Use inf_child_maybe_unpush_target.
* darwin-nat.c (darwin_mourn_inferior): Only unpush the target
after mourning the inferior. Use inf_child_maybe_unpush_target.
(darwin_attach_pid): Don't push the target if it is already
pushed.
* gnu-nat.c (gnu_mourn_inferior): Only unpush the target after
mourning the inferior. Use inf_child_maybe_unpush_target.
(gnu_detach): Use inf_child_maybe_unpush_target.
* go32-nat.c (go32_create_inferior): Don't push the target if it
is already pushed.
(go32_mourn_inferior): Use inf_child_maybe_unpush_target.
* nto-procfs.c (procfs_is_nto_target): Adjust comment.
(procfs_open): Rename to ...
(procfs_open_1): ... this. Add target_ops parameter. Adjust
comments. Can target_preopen before changing node. Call
inf_child_open_target to push the target explicitly.
(procfs_attach): Don't push the target if it is already pushed.
(procfs_detach): Use inf_child_maybe_unpush_target.
(procfs_create_inferior): Don't push the target if it is already
pushed.
(nto_native_ops): New global.
(procfs_open): Reimplement.
(procfs_native_open): New function.
(init_procfs_targets): Install procfs_native_open as to_open of
"target native". Store a pointer to the "native" target in
nto_native_ops.
* procfs.c (procfs_attach): Don't push the target if it is already
pushed.
(procfs_detach): Use inf_child_maybe_unpush_target.
(procfs_mourn_inferior): Only unpush the target after mourning the
inferior. Use inf_child_maybe_unpush_target.
(procfs_init_inferior): Don't push the target if it is already
pushed.
* windows-nat.c (do_initial_windows_stuff): Don't push the target
if it is already pushed.
(windows_detach): Use inf_child_maybe_unpush_target.
(windows_mourn_inferior): Only unpush the target after mourning
the inferior. Use inf_child_maybe_unpush_target.
gdb/doc/
2014-05-21 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Starting): Document "set/show
auto-connect-native-target".
(Target Commands): Document "target native".
gdb/testsuite/
2014-05-21 Pedro Alves <palves@redhat.com>
* boards/gdbserver-base.exp (GDBFLAGS): Set to "set
auto-connect-native-target off".
* gdb.base/auto-connect-native-target.c: New file.
* gdb.base/auto-connect-native-target.exp: New file.
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* NEWS: Mention that the "child", "GNU, "djgpp", "darwin-child"
and "procfs" targets are now called "native" instead.
Although the string says "Done.", nothing is pushing the target as is.
Removing the method override let's us fall through to the the base
to_open implemention in inf-child.c, which will push the target in
reaction to "target native" in a follow up patch.
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* go32-nat.c (go32_open): Delete.
(go32_target): Don't override the to_open method.
This makes QNX/NTO end up with two targets. It preserves "target
procfs <node>", and adds a "native" target to be like other native
ports.
Not tested.
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* nto-procfs.c (procfs_can_run): New function.
(nto_procfs_ops): New global.
(init_procfs_targets): New, based on procfs_target. Install
"target native" in addition to "target procfs".
(_initialize_procfs): Call init_procfs_targets instead of adding
the target here.
To be like other native targets.
Leave to_shortname, to_longname, to_doc as inf-child.c sets them:
t->to_shortname = "native";
t->to_longname = "Native process";
t->to_doc = "Native process (started by the \"run\" command).";
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* windows-nat.c (windows_target): Don't override to_shortname,
to_longname or to_doc.
To be like other native targets.
Leave to_shortname, to_longname, to_doc as inf-child.c sets them:
t->to_shortname = "native";
t->to_longname = "Native process";
t->to_doc = "Native process (started by the \"run\" command).";
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* gnu-nat.c (gnu): Don't override to_shortname, to_longname or
to_doc.
To be like other native targets.
Leave to_shortname, to_longname, to_doc as inf-child.c sets them:
t->to_shortname = "native";
t->to_longname = "Native process";
t->to_doc = "Native process (started by the \"run\" command).";
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* darwin-nat.c (_initialize_darwin_inferior): Don't override
to_shortname, to_longname or to_doc.
To be like other native targets.
Leave to_shortname, to_longname, to_doc as inf-child.c sets them:
t->to_shortname = "native";
t->to_longname = "Native process";
t->to_doc = "Native process (started by the \"run\" command).";
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* go32-nat.c (go32_target): Don't override to_shortname,
to_longname or to_doc.
I had been pondering renaming "target child" to something else.
"child" is a little lie in case of "attach", and not exactly very
clear to users, IMO. By best suggestion is "target native". If I
were to explain what "target child" is, I'd just start out with "it's
the native target" anyway. I was worrying a little that "native"
might be a lie too if some port comes up with a default target that
can run but is not really native, but I think that's a very minor
issue - we can consider that "native" really means the default built
in target that GDB supports, instead of saying that's the target that
debugs host native processes, if it turns out necessary.
This change doesn't affect users much, because "target child" results
in error today:
(gdb) target child
Use the "run" command to start a child process.
Other places "child" is visible:
(gdb) help target
...
List of target subcommands:
target child -- Child process (started by the "run" command)
target core -- Use a core file as a target
target exec -- Use an executable file as a target
...
(gdb) info target
Symbols from "/home/pedro/gdb/mygit/build/gdb/gdb".
Child process:
Using the running image of child Thread 0x7ffff7fc9740 (LWP 4818).
While running this, GDB does not access memory from...
...
These places will say "native" instead. I think that's a good thing.
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* inf-child.c (inf_child_open): Remove mention of "child".
(inf_child_target): Rename target to "native" instead of "child".
gdb/testsuite/
2014-05-21 Pedro Alves <palves@redhat.com>
* gdb.base/default.exp: Test "target native" instead of "target
child".
Now that all invocations of regset_alloc() have been removed, the
function is dropped. Since regset_alloc() was the only function
provided by regset.c, this source file is removed as well.
Clear the naming confusion about "regset" versus "sparc*regset". The
latter was used to represent the *map* of a register set, not the
register set itself, and is thus renamed accordingly.
The following identifiers are renamed:
sparc32_bsd_fpregset => sparc32_bsd_fpregmap
sparc32_linux_core_gregset => sparc32_linux_core_gregmap
sparc32_sol2_fpregset => sparc32_sol2_fpregmap
sparc32_sol2_gregset => sparc32_sol2_gregmap
sparc32_sunos4_fpregset => sparc32_sunos4_fpregmap
sparc32_sunos4_gregset => sparc32_sunos4_gregmap
sparc32nbsd_gregset => sparc32nbsd_gregmap
sparc64_bsd_fpregset => sparc64_bsd_fpregmap
sparc64_linux_core_gregset => sparc64_linux_core_gregmap
sparc64_linux_ptrace_gregset => sparc64_linux_ptrace_gregmap
sparc64_sol2_fpregset => sparc64_sol2_fpregmap
sparc64_sol2_gregset => sparc64_sol2_gregmap
sparc64fbsd_gregset => sparc64fbsd_gregmap
sparc64nbsd_gregset => sparc64nbsd_gregmap
sparc64obsd_core_gregset => sparc64obsd_core_gregmap
sparc64obsd_gregset => sparc64obsd_gregmap
sparc_fpregset => sparc_fpregmap
sparc_gregset => sparc_gregmap
sparc_sol2_fpregset => sparc_sol2_fpregmap
sparc_sol2_gregset => sparc_sol2_gregmap
Also, all local variables 'gregset' and 'fpregset' are renamed to
'gregmap' and 'fpregmap', respectively.
Removes the 'arch' field from the regset structure, since it
represents the only "dynamic" data in a regset. It was referenced in
some regset supply- and collect routines, to get access to the gdbarch
associated with the regset. Naturally, the affected routines always
have access to the regcache to be supplied to or collected from. Thus
the gdbarch associated with that regcache can be used instead.
I have posted:
TLS variables access for -static -lpthread executables
https://sourceware.org/ml/libc-help/2014-03/msg00024.html
and the GDB patch below has been confirmed as OK for current glibcs.
Further work should be done for newer glibcs:
Improve TLS variables glibc compatibility
https://sourceware.org/bugzilla/show_bug.cgi?id=16954
Still the patch below implements the feature in a fully functional way backward
compatible with current glibcs, it depends on the following glibc source line:
csu/libc-tls.c
main_map->l_tls_modid = 1;
gdb/
2014-05-21 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix TLS access for -static -pthread.
* linux-thread-db.c (struct thread_db_info): Add td_thr_tlsbase_p.
(try_thread_db_load_1): Initialize it.
(thread_db_get_thread_local_address): Call it if LM is zero.
* target.c (target_translate_tls_address): Remove LM_ADDR zero check.
* target.h (struct target_ops) (to_get_thread_local_address): Add
load_module_addr comment.
gdb/gdbserver/
2014-05-21 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix TLS access for -static -pthread.
* gdbserver/thread-db.c (struct thread_db): Add td_thr_tlsbase_p.
(thread_db_get_tls_address): Call it if LOAD_MODULE is zero.
(thread_db_load_search, try_thread_db_load_1): Initialize it.
gdb/testsuite/
2014-05-21 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix TLS access for -static -pthread.
* gdb.threads/staticthreads.c <HAVE_TLS> (tlsvar): New.
<HAVE_TLS> (thread_function, main): Initialize it.
* gdb.threads/staticthreads.exp: Try gdb_compile_pthreads for $have_tls.
Add clean_restart.
<$have_tls != "">: Check TLSVAR.
Message-ID: <20140410115204.GB16411@host2.jankratochvil.net>
The dcache (code/stack cache) is supposed to be transparent, but it's
actually not in one case. dcache tries to read chunks (cache lines)
at a time off of the target. This may end up trying to read
unaccessible or unavailable memory. Currently the caller gets an xfer
error in this case. But if the specific bits of memory the caller
actually wanted are available and accessible, then the caller should
get the memory it wanted, not an error.
gdb/
2014-05-21 Pedro Alves <palves@redhat.com>
* dcache.c (dcache_read_memory_partial): If reading the cache line
fails, fallback to reading just the memory the caller wanted.
gdb/testsuite/
2014-05-21 Pedro Alves <palves@redhat.com>
* gdb.base/dcache-line-read-error.c: New.
* gdb.base/dcache-line-read-error.exp: New.
gas/
* config/tc-mips.c (file_mips_opts_checked): New static global.
(s_module): New static function.
(file_ase): Remove.
(mips_pseudo_table): Add .module handler.
(mips_set_ase): Add opts argument and use instead of mips_opts.
(md_assemble): Use file_mips_check_options.
(md_parse_option): Update to use file_mips_opts instead of mips_opts.
(mips_set_architecture): Delete function. Moved to...
(mips_after_parse_args): Here. All logic now applies to
file_mips_opts first and then copies the final state to mips_opts.
Move error checking and defaults inference to mips_check_options and
file_mips_check_options.
(mips_check_options): New static function. Common option checking for
command line, .module and .set. Use .module values in error messages
instead of refering to command line options.
(file_mips_check_options): New static function. A wrapper for
mips_check_options with file_mips_opts. Updates BFD arch based on
final options.
(s_mipsset): Split into s_mipsset and parse_code_option. Settings
supported by both .set and .module are moved to parse_code_option.
Warnings and errors are kept in s_mipsset because when
parse_code_option is used with s_module the warnings are deferred
until code is generated. Any setting supporting 'default' value is
kept in s_mipsset as it is not applicable to s_module. Inferred
settings are also kept in s_mipsset as s_module does not infer any
settings. Use mips_check_options.
(parse_code_option): New static function derived from s_mipsset.
(s_module): New static function that implements .module. Allows file
level settings to be changed until code is generated.
(s_cpload, s_cpsetup, s_cplocal): Use file_mips_check_options.
(s_cprestore, s_cpreturn, s_cpadd, mips_address_bytes): Likewise.
(mips_elf_final_processing): Update file_ase to file_mips_opts.ase.
(md_mips_end): Use file_mips_check_options.
* doc/c-mips.texi: Document .module.
gas/testsuite
* gas/mips/mips.exp: Add new tests. Use 64-bit ABI for relax-bc1any.
Fix micromips arch definition to use mips64r2 consistently.
* gas/mips/module-defer-warn1.s: New.
* gas/mips/module-defer-warn1.d: New.
* gas/mips/module-defer-warn2.s: New.
* gas/mips/module-defer-warn2.l: New.
* gas/mips/module-override.d: New.
* gas/mips/module-override.s: New.
* gas/mips/mips-gp32-fp64.l: Update expected output.
* gas/mips/mips-gp64-fp32-pic.l: Update expected output.
* gas/mips/mips-gp64-fp32.l: Update expected output.
UNRESOLVED: gdb.multi/base.exp: remove-inferiors 2-3
UNRESOLVED: gdb.multi/base.exp: check remove-inferiors
gdb is crashing because it's accessing/freeing already freed memory.
==16368== Invalid read of size 4
==16368== at 0x660A9D: find_pc_section (binutils-gdb/gdb/objfiles.c:1349)
==16368== by 0x663ECB: lookup_minimal_symbol_by_pc_section (binutils-gdb/gdb/minsyms.c:734)
==16368== by 0x5D987A: find_pc_sect_symtab (binutils-gdb/gdb/symtab.c:2153)
==16368== by 0x5D4D77: blockvector_for_pc_sect (binutils-gdb/gdb/block.c:168)
==16368== by 0x5D4F59: block_for_pc_sect (binutils-gdb/gdb/block.c:246)
==16368== by 0x5D4F9B: block_for_pc (binutils-gdb/gdb/block.c:258)
==16368== by 0x734C5D: inline_frame_sniffer (binutils-gdb/gdb/inline-frame.c:218)
==16368== by 0x732104: frame_unwind_try_unwinder (binutils-gdb/gdb/frame-unwind.c:108)
==16368== by 0x73223F: frame_unwind_find_by_frame (binutils-gdb/gdb/frame-unwind.c:159)
==16368== by 0x72D5AA: compute_frame_id (binutils-gdb/gdb/frame.c:453)
==16368== by 0x7300EC: get_prev_frame_if_no_cycle (binutils-gdb/gdb/frame.c:1758)
==16368== by 0x73079A: get_prev_frame_always (binutils-gdb/gdb/frame.c:1931)
==16368== Address 0x5b13500 is 16 bytes inside a block of size 24 free'd
==16368== at 0x403072E: free (valgrind/coregrind/m_replacemalloc/vg_replace_malloc.c:445)
==16368== by 0x762134: xfree (binutils-gdb/gdb/common/common-utils.c:108)
==16368== by 0x65DACF: objfiles_pspace_data_cleanup (binutils-gdb/gdb/objfiles.c:91)
==16368== by 0x75E546: program_spaceregistry_callback_adaptor (binutils-gdb/gdb/progspace.c:45)
==16368== by 0x7644F6: registry_clear_data (binutils-gdb/gdb/registry.c:82)
==16368== by 0x7645AB: registry_container_free_data (binutils-gdb/gdb/registry.c:95)
==16368== by 0x75E5B4: program_space_free_data (binutils-gdb/gdb/progspace.c:45)
==16368== by 0x75E9BA: release_program_space (binutils-gdb/gdb/progspace.c:167)
==16368== by 0x75EB9B: prune_program_spaces (binutils-gdb/gdb/progspace.c:269)
==16368== by 0x75303D: remove_inferior_command (binutils-gdb/gdb/inferior.c:792)
==16368== by 0x50B5FD: do_cfunc (binutils-gdb/gdb/cli/cli-decode.c:107)
==16368== by 0x50E6F2: cmd_func (binutils-gdb/gdb/cli/cli-decode.c:1886)
The problem originates from the get_current_arch call in
py-progspace.c:py_free_pspace. The inferior associated with the
pspace is gone, and the current inferior is a different one and is running.
Therefore get_current_arch tries to read the current frame which
causes reads of data in the current program space which we've just deleted.
* python/py-progspace.c (py_free_pspace): Call target_gdbarch
instead of get_current_arch.
