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2009-07-18 Michael Snyder <msnyder@vmware.com> 

* infrun.c (handle_inferior_event): Remove an execution_direction
	check in the "check for subroutine calls" test, and add some
	additional handling for reverse-stepping through shared libraries.
This commit is contained in:
Michael Snyder 2009-07-18 23:35:31 +00:00
parent 99f752754d
commit fdd654f3cc
2 changed files with 41 additions and 3 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2009-07-18 Michael Snyder <msnyder@vmware.com>
* infrun.c (handle_inferior_event): Remove an execution_direction
check in the "check for subroutine calls" test, and add some
additional handling for reverse-stepping through shared libraries.
2009-07-18 Anthony Green <green@moxielogic.com>
* moxie-tdep.c (moxie_analyze_prologue): Take gdbarch as last

38
gdb/infrun.c
View File

@ -3776,9 +3776,8 @@ infrun: not switching back to stepped thread, it has vanished\n");
previous frame must have valid frame IDs. */
if (!frame_id_eq (get_stack_frame_id (frame),
ecs->event_thread->step_stack_frame_id)
&& (frame_id_eq (frame_unwind_caller_id (frame),
ecs->event_thread->step_stack_frame_id)
|| execution_direction == EXEC_REVERSE))
&& frame_id_eq (frame_unwind_caller_id (frame),
ecs->event_thread->step_stack_frame_id))
{
CORE_ADDR real_stop_pc;
@ -3806,6 +3805,7 @@ infrun: not switching back to stepped thread, it has vanished\n");
/* Reverse stepping through solib trampolines. */
if (execution_direction == EXEC_REVERSE
&& ecs->event_thread->step_over_calls != STEP_OVER_NONE
&& (gdbarch_skip_trampoline_code (gdbarch, frame, stop_pc)
|| (ecs->stop_func_start == 0
&& in_solib_dynsym_resolve_code (stop_pc))))
@ -3923,6 +3923,38 @@ infrun: not switching back to stepped thread, it has vanished\n");
return;
}
/* Reverse stepping through solib trampolines. */
if (execution_direction == EXEC_REVERSE
&& ecs->event_thread->step_over_calls != STEP_OVER_NONE)
{
if (gdbarch_skip_trampoline_code (gdbarch, frame, stop_pc)
|| (ecs->stop_func_start == 0
&& in_solib_dynsym_resolve_code (stop_pc)))
{
/* Any solib trampoline code can be handled in reverse
by simply continuing to single-step. We have already
executed the solib function (backwards), and a few
steps will take us back through the trampoline to the
caller. */
keep_going (ecs);
return;
}
else if (in_solib_dynsym_resolve_code (stop_pc))
{
/* Stepped backward into the solib dynsym resolver.
Set a breakpoint at its start and continue, then
one more step will take us out. */
struct symtab_and_line sr_sal;
init_sal (&sr_sal);
sr_sal.pc = ecs->stop_func_start;
insert_step_resume_breakpoint_at_sal (gdbarch,
sr_sal, null_frame_id);
keep_going (ecs);
return;
}
}
/* If we're in the return path from a shared library trampoline,
we want to proceed through the trampoline when stepping. */
if (gdbarch_in_solib_return_trampoline (gdbarch,