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2009-04-13 David Daney <ddaney@caviumnetworks.com>

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* infrun.c (maybe_software_singlestep): New function.
	(resume): Call maybe_software_singlestep.
	(handle_inferior_event): Same.
This commit is contained in:
David Daney 2009-04-14 00:59:47 +00:00
parent bf21c8117e
commit 2facfe5cc4
2 changed files with 37 additions and 16 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2009-04-13 David Daney <ddaney@caviumnetworks.com>
* infrun.c (maybe_software_singlestep): New function.
(resume): Call maybe_software_singlestep.
(handle_inferior_event): Same.
2009-04-13 Tom Tromey <tromey@redhat.com>
* python/python-frame.c (frapy_richcompare): Return

47
gdb/infrun.c
View File

@ -950,6 +950,29 @@ set_schedlock_func (char *args, int from_tty, struct cmd_list_element *c)
}
}
/* Try to setup for software single stepping over the specified location.
Return 1 if target_resume() should use hardware single step.
GDBARCH the current gdbarch.
PC the location to step over. */
static int
maybe_software_singlestep (struct gdbarch *gdbarch, CORE_ADDR pc)
{
int hw_step = 1;
if (gdbarch_software_single_step_p (gdbarch)
&& gdbarch_software_single_step (gdbarch, get_current_frame ()))
{
hw_step = 0;
/* Do not pull these breakpoints until after a `wait' in
`wait_for_inferior' */
singlestep_breakpoints_inserted_p = 1;
singlestep_ptid = inferior_ptid;
singlestep_pc = pc;
}
return hw_step;
}
/* Resume the inferior, but allow a QUIT. This is useful if the user
wants to interrupt some lengthy single-stepping operation
@ -1031,20 +1054,9 @@ a command like `return' or `jump' to continue execution."));
}
}
if (step && gdbarch_software_single_step_p (gdbarch))
{
/* Do it the hard way, w/temp breakpoints */
if (gdbarch_software_single_step (gdbarch, get_current_frame ()))
{
/* ...and don't ask hardware to do it. */
step = 0;
/* and do not pull these breakpoints until after a `wait' in
`wait_for_inferior' */
singlestep_breakpoints_inserted_p = 1;
singlestep_ptid = inferior_ptid;
singlestep_pc = pc;
}
}
/* Do we need to do it the hard way, w/temp breakpoints? */
if (step)
step = maybe_software_singlestep (gdbarch, pc);
/* If there were any forks/vforks/execs that were caught and are
now to be followed, then do so. */
@ -2826,11 +2838,14 @@ targets should add new threads to the thread list themselves in non-stop mode.")
the inferior over it. If we have non-steppable watchpoints,
we must disable the current watchpoint; it's simplest to
disable all watchpoints and breakpoints. */
int hw_step = 1;
if (!HAVE_STEPPABLE_WATCHPOINT)
remove_breakpoints ();
registers_changed ();
target_resume (ecs->ptid, 1, TARGET_SIGNAL_0); /* Single step */
/* Single step */
hw_step = maybe_software_singlestep (current_gdbarch, read_pc ());
target_resume (ecs->ptid, hw_step, TARGET_SIGNAL_0);
waiton_ptid = ecs->ptid;
if (HAVE_STEPPABLE_WATCHPOINT)
infwait_state = infwait_step_watch_state;