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2001-06-01 Michael Snyder <msnyder@redhat.com>

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* thread.c (delete_step_resume_breakpoint): New function.
	Maintain internal consistency of the thread list while deleting
	a step_resume_breakpoint.
	* gdbthread.h (delete_step_resume_breakpoint): Export.
	* breakpoint.c (bpstat_find_step_resume_breakpoint):
	Make thread-aware: don't return a step_resume_breakpoint
	for the wrong thread.
	* infrun.c (wait_for_inferior): Call delete_step_resume_breakpoint
	instead of delete_breakpoint_current_contents.
	(fetch_inferior_event): Ditto.
	(handle_inferior_event): Call delete_step_resume_breakpoint
	instead of delete_breakpoint.
This commit is contained in:
Michael Snyder 2001-06-02 00:36:20 +00:00
parent c6ad9598d0
commit 8601f500c8
5 changed files with 43 additions and 7 deletions
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12
gdb/ChangeLog
View File

@ -1,5 +1,17 @@
2001-06-01 Michael Snyder <msnyder@redhat.com>
* thread.c (delete_step_resume_breakpoint): New function.
Maintain internal consistency of the thread list while deleting
a step_resume_breakpoint.
* gdbthread.h (delete_step_resume_breakpoint): Export.
* breakpoint.c (bpstat_find_step_resume_breakpoint):
Make thread-aware: don't return a step_resume_breakpoint
for the wrong thread.
* infrun.c (wait_for_inferior): Call delete_step_resume_breakpoint
instead of delete_breakpoint_current_contents.
(fetch_inferior_event): Ditto.
(handle_inferior_event): Call delete_step_resume_breakpoint
instead of delete_breakpoint.
* infrun.c (handle_inferior_event): After singlestepping over a
thread-specific breakpoint, use currently_stepping() to decide
whether to step or continue.

8
gdb/breakpoint.c
View File

@ -1719,13 +1719,19 @@ bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
struct breakpoint *
bpstat_find_step_resume_breakpoint (bpstat bsp)
{
int current_thread;
if (bsp == NULL)
error ("Internal error (bpstat_find_step_resume_breakpoint)");
current_thread = pid_to_thread_id (inferior_ptid);
for (; bsp != NULL; bsp = bsp->next)
{
if ((bsp->breakpoint_at != NULL) &&
(bsp->breakpoint_at->type == bp_step_resume))
(bsp->breakpoint_at->type == bp_step_resume) &&
(bsp->breakpoint_at->thread == current_thread ||
bsp->breakpoint_at->thread == -1))
return bsp->breakpoint_at;
}

3
gdb/gdbthread.h
View File

@ -78,6 +78,9 @@ extern struct thread_info *add_thread (ptid_t ptid);
/* Delete an existing thread list entry. */
extern void delete_thread (ptid_t);
/* Delete a step_resume_breakpoint from the thread database. */
extern void delete_step_resume_breakpoint (void *);
/* Translate the integer thread id (GDB's homegrown id, not the system's)
into a "pid" (which may be overloaded with extra thread information). */
extern ptid_t thread_id_to_pid (int);

10
gdb/infrun.c
View File

@ -1277,7 +1277,7 @@ wait_for_inferior (void)
struct execution_control_state ecss;
struct execution_control_state *ecs;
old_cleanups = make_cleanup (delete_breakpoint_current_contents,
old_cleanups = make_cleanup (delete_step_resume_breakpoint,
&step_resume_breakpoint);
make_cleanup (delete_breakpoint_current_contents,
&through_sigtramp_breakpoint);
@ -1341,7 +1341,7 @@ fetch_inferior_event (void *client_data)
if (!async_ecs->wait_some_more)
{
old_cleanups = make_exec_cleanup (delete_breakpoint_current_contents,
old_cleanups = make_exec_cleanup (delete_step_resume_breakpoint,
&step_resume_breakpoint);
make_exec_cleanup (delete_breakpoint_current_contents,
&through_sigtramp_breakpoint);
@ -2362,8 +2362,7 @@ handle_inferior_event (struct execution_control_state *ecs)
interferes with us */
if (step_resume_breakpoint != NULL)
{
delete_breakpoint (step_resume_breakpoint);
step_resume_breakpoint = NULL;
delete_step_resume_breakpoint (&step_resume_breakpoint);
}
/* Not sure whether we need to blow this away too, but probably
it is like the step-resume breakpoint. */
@ -2461,8 +2460,7 @@ handle_inferior_event (struct execution_control_state *ecs)
step_resume_breakpoint =
bpstat_find_step_resume_breakpoint (stop_bpstat);
}
delete_breakpoint (step_resume_breakpoint);
step_resume_breakpoint = NULL;
delete_step_resume_breakpoint (&step_resume_breakpoint);
break;
case BPSTAT_WHAT_THROUGH_SIGTRAMP:

17
gdb/thread.c
View File

@ -65,6 +65,23 @@ static void restore_current_thread (ptid_t);
static void switch_to_thread (ptid_t ptid);
static void prune_threads (void);
void
delete_step_resume_breakpoint (void *arg)
{
struct breakpoint **breakpointp = (struct breakpoint **) arg;
struct thread_info *tp;
if (*breakpointp != NULL)
{
delete_breakpoint (*breakpointp);
for (tp = thread_list; tp; tp = tp->next)
if (tp->step_resume_breakpoint == *breakpointp)
tp->step_resume_breakpoint = NULL;
*breakpointp = NULL;
}
}
static void
free_thread (struct thread_info *tp)
{