The target debug methods are inconsistently maintained. Most to_*
methods have some kind of targetdebug awareness, but not all of them
do. The ones that do vary in the quantity and quality of output they
generate.
This patch changes most of the target debug methods to be
automatically generated. All the arguments are printed, and separate
lines are printed for entering and existing the outermost call to the
target stack.
For example now you'd see:
-> multi-thread->to_terminal_ours (...)
-> multi-thread->to_is_async_p (...)
<- multi-thread->to_is_async_p (0x1ebb580) = 1
<- multi-thread->to_terminal_ours (0x1ebb580)
-> multi-thread->to_thread_address_space (...)
<- multi-thread->to_thread_address_space (0x1ebb580, 26802) = 1
In this case you can see nested calls. The "multi-thread" on the left
hand side is the topmost target's shortname.
There are some oddities with this patch. I'm on the fence about it
all, I really just wrote it on a whim.
It's not simple to convert every possible method, since a few don't
participate in target delegation.
Printing is done by type, so I introduced some new
debug-printing-specific typedefs to handle cases where it is nicer to
do something else.
On the plus side, this lays the groundwork for making targetdebug
affect every layer of the target stack. The idea would be to wrap
each target_ops in the stack with its own debug_target, and then you
could see calls propagate down the stack and back up; I suppose with
indentation to make it prettier. (That said there are some gotchas
lurking in this idea due to target stack introspection.)
Regtested on x86-64 Fedora 20.
2014-07-24 Tom Tromey <tromey@redhat.com>
* make-target-delegates (munge_type, write_debugmethod): New
functions.
(debug_names): New global.
($TARGET_DEBUG_PRINTER): New global.
(write_function_header): Strip TARGET_DEBUG_PRINTER from the type
name.
Write debug methods. Generate init_debug_target.
* target-debug.h: New file.
* target-delegates.c: Rebuild.
* target.c: Include target-debug.h.
(debug_target): Hoist definition.
(target_kill, target_get_section_table, target_memory_map)
(target_flash_erase, target_flash_done, target_detach)
(target_disconnect, target_wait, target_resume)
(target_pass_signals, target_program_signals, target_follow_fork)
(target_mourn_inferior, target_search_memory)
(target_thread_address_space, target_close)
(target_find_new_threads, target_core_of_thread)
(target_verify_memory, target_insert_mask_watchpoint)
(target_remove_mask_watchpoint): Remove targetdebug code.
(debug_to_post_attach, debug_to_prepare_to_store)
(debug_to_files_info, debug_to_insert_breakpoint)
(debug_to_remove_breakpoint, debug_to_can_use_hw_breakpoint)
(debug_to_region_ok_for_hw_watchpoint)
(debug_to_can_accel_watchpoint_condition)
(debug_to_stopped_by_watchpoint, debug_to_stopped_data_address)
(debug_to_watchpoint_addr_within_range)
(debug_to_insert_hw_breakpoint, debug_to_remove_hw_breakpoint)
(debug_to_insert_watchpoint, debug_to_remove_watchpoint)
(debug_to_terminal_init, debug_to_terminal_inferior)
(debug_to_terminal_ours_for_output, debug_to_terminal_ours)
(debug_to_terminal_save_ours, debug_to_terminal_info)
(debug_to_load, debug_to_post_startup_inferior)
(debug_to_insert_fork_catchpoint)
(debug_to_remove_fork_catchpoint)
(debug_to_insert_vfork_catchpoint)
(debug_to_remove_vfork_catchpoint)
(debug_to_insert_exec_catchpoint)
(debug_to_remove_exec_catchpoint, debug_to_has_exited)
(debug_to_can_run, debug_to_thread_architecture, debug_to_stop)
(debug_to_rcmd, debug_to_pid_to_exec_file): Remove.
(setup_target_debug): Call init_debug_target.
* target.h (TARGET_DEBUG_PRINTER): New macro.
(struct target_ops) <to_resume, to_wait, to_pass_signals,
to_program_signals>: Use TARGET_DEBUG_PRINTER.
This patch rewrites the make-target-delegates matching code a little
bit. The result is functionally the same (the output has some small
whitespace differences), but the new code is more forgiving regarding
the formatting of target.h. In particular now there's no need to
ensure that the return type and the method name appear on the same
line.
2014-07-23 Tom Tromey <tromey@redhat.com>
* make-target-delegates ($ARGS_PART): Match trailing close paren.
($INTRO_PART): Don't match whitespace.
($METHOD_TRAILER): Move earlier. Remove trailing semicolon and
argument matching.
($METHOD): Add $METHOD_TRAILER.
(trim): Rewrite.
(scan_target_h): New sub.
Change main loop not to collect state.
* target-delegates.c: Rebuild.
target-delegates.c was out of date. This patch rebuilds it.
Built and regtested on x86-64 Fedora 20.
Committed as obvious.
2014-07-16 Tom Tromey <tromey@redhat.com>
* target-delegates.c: Rebuild.
This converts to_get_thread_local_address to use
TARGET_DEFAULT_NORETURN. One possible oddity is that this changes the
text of the kind of exception thrown in some cases. This doesn't seem
to be a problem; in fact perhaps the final call to 'error' in
target_translate_tls_address should be changed to call
generic_tls_error.
2014-07-07 Tom Tromey <tromey@redhat.com>
* target.h (struct target_ops) <to_get_thread_local_address>: Use
TARGET_DEFAULT_NORETURN.
* target.c (generic_tls_error): New function.
(target_translate_tls_address): Don't search target stack.
* target-delegates.c: Rebuild.
* ppc-linux-tdep.c (ppc_linux_spe_context): Don't search target
stack.
* linux-thread-db.c (thread_db_get_thread_local_address):
Unconditionally call beneath target.
This makes arguments to to_get_bookmark and to_goto_bookmark const and
fixes the fallout. Tested by rebuilding. The only thing of note is
the new split between cmd_record_goto and record_goto -- basically
separating the CLI function from a new internal API, to allow const
propagation.
2014-06-26 Tom Tromey <tromey@redhat.com>
* record-full.c (record_full_get_bookmark): Make "args" const.
(record_full_goto_bookmark): Make "raw_bookmark" const.
* record.c (record_goto): New function.
(cmd_record_goto): Use it. Now static.
* record.h (record_goto): Declare.
(cmd_record_goto): Remove declaration.
* target-delegates.c: Rebuild.
* target.h (struct target_ops) <to_get_bookmark,
to_goto_bookmark>: Make parameter const.
This makes the argument to the target_ops to_load method "const", and
fixes up the fallout. Tested by rebuilding all the affected files.
2014-06-26 Tom Tromey <tromey@redhat.com>
* defs.h (generic_load): Update.
* m32r-rom.c (m32r_load_gen): Make "filename" const.
* monitor.c (monitor_load): Make "args" const.
* remote-m32r-sdi.c (m32r_load): Make "args" const.
* remote-mips.c (mips_load_srec, pmon_load_fast): Make "args"
const.
(mips_load): Make "file" const.
* remote-sim.c (gdbsim_load): Make "args" const.
* remote.c (remote_load): Make "name" const.
* symfile.c (generic_load): Make "args" const.
* target-delegates.c: Rebuild.
* target.c (target_load): Make "arg" const.
(debug_to_load): Make "args" const.
* target.h (struct target_ops) <to_load>: Make parameter const.
(target_load): Update.
Add new target functions to_prepare_to_generate_core and
to_done_generating_core that are called before and after generating a core
file, respectively.
This allows targets to prepare for core file generation and to clean up
afterwards.
gdb/
* target.h (target_ops) <to_prepare_to_generate_core>
<to_done_generating_core>: New.
(target_prepare_to_generate_core, target_done_generating_core): New.
* target.c (target_prepare_to_generate_core)
(target_done_generating_core): New.
* target-delegates.c: Regenerate.
* gcore.c: (write_gcore_file): Rename to ...
(write_gcore_file_1): ...this.
(write_gcore_file): Call target_prepare_to_generate_core
and target_done_generating_core.
This converts to_thread_address_space to use TARGET_DEFAULT_FUNC.
This method was one of a handful not using the normal target
delegation approach. The only rationale here is consistency in the
target vector.
Built and regtested on x86-64 Fedora 20.
2014-06-04 Tom Tromey <tromey@redhat.com>
* target-delegates.c: Rebuild.
* target.c (default_thread_address_space): New function.
(target_thread_address_space): Simplify.
* target.h (struct target_ops) <to_thread_address_space>: Add
TARGET_DEFAULT_FUNC.
This does two things:
1. Adds a test.
Recently compare-sections got a new "-r" switch, but given no test
existed for compare-sections, the patch was allowed in with no
testsuite addition. This now adds a test for both compare-sections
and compare-sections -r.
2. Makes the compare-sections command work against all targets.
Currently, compare-sections only works with remote targets, and only
those that support the qCRC packet. The patch makes it so that if the
target doesn't support accelerating memory verification, then GDB
falls back to comparing memory itself. This is of course slower, but
it's better than nothing, IMO. While testing against extended-remote
GDBserver I noticed that we send the qCRC request to the target if
we're connected, but not yet running a program. That can't work of
course -- the patch fixes that. This all also goes in the direction
of bridging the local/remote parity gap.
I didn't decouple 1. from 2., because that would mean that the test
would need to handle the case of the target not supporting the
command.
Tested on x86_64 Fedora 17, native, remote GDBserver, and
extended-remote GDBserver. I also hack-disabled qCRC support to make
sure the fallback paths in remote.c work.
gdb/doc/
2014-05-20 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Memory) <compare-sections>: Generalize comments to
not be remote specific. Add cross reference to the qCRC packet.
(Separate Debug Files): Update cross reference to the qCRC packet.
(General Query Packets) <qCRC packet>: Add anchor.
gdb/
2014-05-20 Pedro Alves <palves@redhat.com>
* NEWS: Mention that compare-sections now works with all targets.
* remote.c (PACKET_qCRC): New enum value.
(remote_verify_memory): Don't send qCRC if the target has no
execution. Use packet_support/packet_ok. If the target doesn't
support the qCRC packet, fallback to a deep memory copy.
(compare_sections_command): Say "target image" instead of "remote
executable".
(_initialize_remote): Add PACKET_qCRC to the list of config
packets that have no associated command. Extend comment.
* target.c (simple_verify_memory, default_verify_memory): New
function.
* target.h (struct target_ops) <to_verify_memory>: Default to
default_verify_memory.
(simple_verify_memory): New declaration.
* target-delegates.c: Regenerate.
gdb/testsuite/
2014-05-20 Pedro Alves <palves@redhat.com>
* gdb.base/compare-sections.c: New file.
* gdb.base/compare-sections.exp: New file.
A patch in the target cleanup series caused a regression when using
record with target-async. Version 4 of the patch is here:
https://sourceware.org/ml/gdb-patches/2014-03/msg00159.html
The immediate problem is that record supplies to_can_async_p and
to_is_async_p methods, but does not supply a to_async method. So,
when target-async is set, record claims to support async -- but if the
underlying target does not support async, then the to_async method
call will end up in that method's default implementation, namely
tcomplain.
This worked previously because the record target used to provide a
to_async method; one that (erroneously, only at push time) checked the
other members of the target stack, and then simply dropped to_async
calls in the "does not implement async" case.
My first thought was to simply drop tcomplain as the default for
to_async. This works, but Pedro pointed out that the only reason
record has to supply to_can_async_p and to_is_async_p is that these
default to using the find_default_run_target machinery -- and these
defaults are only needed by "run" and "attach".
So, a nicer solution presents itself: change run and attach to
explicitly call into the default run target when needed; and change
to_is_async_p and to_can_async_p to default to "return 0". This makes
the target stack simpler to use and lets us remove the method
implementations from record. This is also in harmony with other plans
for the target stack; namely trying to reduce the impact of
find_default_run_target. This approach makes it clear that
find_default_is_async_p is not needed -- it is asking whether a target
that may not even be pushed is actually async, which seems like a
nonsensical question.
While an improvement, this approach proved to introduce the same bug
when using the core target. Looking a bit deeper, the issue is that
code in "attach" and "run" may need to use either the current target
stack or the default run target -- but different calls into the target
API in those functions could wind up querying different targets.
This new patch makes the target to use more explicit in "run" and
"attach". Then these commands explicitly make the needed calls
against that target. This ensures that a single target is used for
all relevant operations. This lets us remove a couple find_default_*
functions from various targets, including the dummy target. I think
this is a decent understandability improvement.
One issue I see with this patch is that the new calls in "run" and
"attach" are not very much like the rest of the target API. I think
fundamentally this is due to bad factoring in the target API, which
may need to be fixed for multi-target. Tackling that seemed ambitious
for a regression fix.
While working on this I noticed that there don't seem to be any test
cases that involve both target-async and record, so this patch changes
break-precsave.exp to add some. It also changes corefile.exp to add
some target-async tests; these pass with current trunk and with this
patch applied, but fail with the v1 patch.
This patch differs from v4 in that it moves initialization of
to_can_async_p and to_supports_non_stop into inf-child, adds some
assertions to complete_target_initialization, and adds some comments
to target.h.
Built and regtested on x86-64 Fedora 20.
2014-03-12 Tom Tromey <tromey@redhat.com>
* inf-child.c (return_zero): New function.
(inf_child_target): Set to_can_async_p, to_supports_non_stop.
* aix-thread.c (aix_thread_inferior_created): New function.
(aix_thread_attach): Remove.
(init_aix_thread_ops): Don't set to_attach.
(_initialize_aix_thread): Register inferior_created observer.
* corelow.c (init_core_ops): Don't set to_attach or
to_create_inferior.
* exec.c (init_exec_ops): Don't set to_attach or
to_create_inferior.
* infcmd.c (run_command_1): Use find_run_target. Make direct
target calls.
(attach_command): Use find_attach_target. Make direct target
calls.
* record-btrace.c (init_record_btrace_ops): Don't set
to_create_inferior.
* record-full.c (record_full_can_async_p, record_full_is_async_p):
Remove.
(init_record_full_ops, init_record_full_core_ops): Update. Don't
set to_create_inferior.
* target.c (complete_target_initialization): Add assertion.
(target_create_inferior): Remove.
(find_default_attach, find_default_create_inferior): Remove.
(find_attach_target, find_run_target): New functions.
(find_default_is_async_p, find_default_can_async_p)
(target_supports_non_stop, target_attach): Remove.
(init_dummy_target): Don't set to_create_inferior or
to_supports_non_stop.
* target.h (struct target_ops) <to_attach>: Add comment. Remove
TARGET_DEFAULT_FUNC.
<to_create_inferior>: Add comment.
<to_can_async_p, to_is_async_p, to_supports_non_stop>: Use
TARGET_DEFAULT_RETURN.
<to_can_async_p, to_supports_non_stop, to_can_run>: Add comments.
(find_attach_target, find_run_target): Declare.
(target_create_inferior): Remove.
(target_has_execution_1): Update comment.
(target_supports_non_stop): Remove.
* target-delegates.c: Rebuild.
2014-03-12 Tom Tromey <tromey@redhat.com>
* gdb.base/corefile.exp (corefile_test_run, corefile_test_attach):
New procs. Add target-async tests.
* gdb.reverse/break-precsave.exp (precsave_tests): New proc.
Add target-async tests.
This patch is to change the default implementation of to_traceframe_info
from 'return NULL' to tcomplain, which is intended. If new target
supports tracepoint, this method should be implemented, otherwise,
an error is thrown.
gdb:
2014-03-06 Yao Qi <yao@codesourcery.com>
* target.h (struct target_ops) <to_traceframe_info>: Use
TARGET_DEFAULT_NORETURN (tcomplain ()).
* target-delegates.c: Regenerated.
This converts to_get_unwinder and to_get_tailcall_unwinder to methods
and arranges for them to use the new delegation scheme.
This just lets us avoid having a differing style (neither new-style
nor INHERIT) of delegation in the tree.
2014-02-19 Tom Tromey <tromey@redhat.com>
* target.c (target_get_unwinder): Rewrite.
(target_get_tailcall_unwinder): Rewrite.
* record-btrace.c (record_btrace_to_get_unwinder): New function.
(record_btrace_to_get_tailcall_unwinder): New function.
(init_record_btrace_ops): Update.
* target.h (struct target_ops) <to_get_unwinder,
to_get_tailcall_unwinder>: Now function pointers. Use
TARGET_DEFAULT_RETURN.
This converts to_decr_pc_after_break to the new style of delegation,
removing forward_target_decr_pc_after_break.
2014-02-19 Tom Tromey <tromey@redhat.com>
* record-btrace.c (record_btrace_decr_pc_after_break): Delegate
directly.
* target-delegates.c: Rebuild.
* target.h (struct target_ops) <to_decr_pc_after_break>: Use
TARGET_DEFAULT_FUNC.
* target.c (default_target_decr_pc_after_break): Rename from
forward_target_decr_pc_after_break. Simplify.
(target_decr_pc_after_break): Rely on delegation.
This changes instances of TARGET_DEFAULT_RETURN(0) to
TARGET_DEFAULT_RETURN(NULL) when appropriate. The use of "0" was a
relic from an earlier implementation of make-target-delegates; and I
didn't want to go back through the long patch series, fixing up
conflicts, just to change this small detail.
2014-02-19 Tom Tromey <tromey@redhat.com>
* target-delegates.c: Rebuild.
* target.h (struct target_ops) <to_extra_thread_info,
to_thread_name, to_pid_to_exec_file, to_get_section_table,
to_memory_map, to_read_description, to_traceframe_info>: Use NULL,
not 0, in TARGET_DEFAULT_RETURN.
This switches to_read_description to the "new normal" delegation
scheme. This one was a bit trickier than the other changes due to the
way that target_read_description handled delegation. I examined all
the target implementations of to_read_description and changed the ones
returning NULL to instead delegate.
2014-02-19 Tom Tromey <tromey@redhat.com>
* arm-linux-nat.c (arm_linux_read_description): Delegate when
needed.
* corelow.c (core_read_description): Delegate when needed.
* remote.c (remote_read_description): Delegate when needed.
* target-delegates.c: Rebuild.
* target.c (target_read_description): Rewrite.
* target.h (struct target_ops) <to_read_description>: Update
comment. Use TARGET_DEFAULT_RETURN.
