value);
}
-/* Nonzero means expecting a trace trap
- and should stop the inferior and return silently when it happens. */
-
-int stop_after_trap;
-
/* Nonzero after stop if current stack frame should be printed. */
static int stop_print_frame;
{
char *name = exec_file_find (execd_pathname, NULL);
- execd_pathname = alloca (strlen (name) + 1);
+ execd_pathname = (char *) alloca (strlen (name) + 1);
strcpy (execd_pathname, name);
xfree (name);
}
static void
displaced_step_clear_cleanup (void *arg)
{
- struct displaced_step_inferior_state *state = arg;
+ struct displaced_step_inferior_state *state
+ = (struct displaced_step_inferior_state *) arg;
displaced_step_clear (state);
}
struct thread_info *tp = find_thread_ptid (ptid);
struct regcache *regcache = get_thread_regcache (ptid);
struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct address_space *aspace = get_regcache_aspace (regcache);
CORE_ADDR original, copy;
ULONGEST len;
struct displaced_step_closure *closure;
copy = gdbarch_displaced_step_location (gdbarch);
len = gdbarch_max_insn_length (gdbarch);
+ if (breakpoint_in_range_p (aspace, copy, len))
+ {
+ /* There's a breakpoint set in the scratch pad location range
+ (which is usually around the entry point). We'd either
+ install it before resuming, which would overwrite/corrupt the
+ scratch pad, or if it was already inserted, this displaced
+ step would overwrite it. The latter is OK in the sense that
+ we already assume that no thread is going to execute the code
+ in the scratch pad range (after initial startup) anyway, but
+ the former is unacceptable. Simply punt and fallback to
+ stepping over this breakpoint in-line. */
+ if (debug_displaced)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "displaced: breakpoint set in scratch pad. "
+ "Stepping over breakpoint in-line instead.\n");
+ }
+
+ do_cleanups (old_cleanups);
+ return -1;
+ }
+
/* Save the original contents of the copy area. */
- displaced->step_saved_copy = xmalloc (len);
+ displaced->step_saved_copy = (gdb_byte *) xmalloc (len);
ignore_cleanups = make_cleanup (free_current_contents,
&displaced->step_saved_copy);
status = target_read_memory (copy, displaced->step_saved_copy, len);
static const char schedlock_off[] = "off";
static const char schedlock_on[] = "on";
static const char schedlock_step[] = "step";
+static const char schedlock_replay[] = "replay";
static const char *const scheduler_enums[] = {
schedlock_off,
schedlock_on,
schedlock_step,
+ schedlock_replay,
NULL
};
-static const char *scheduler_mode = schedlock_off;
+static const char *scheduler_mode = schedlock_replay;
static void
show_scheduler_mode (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
resume. */
resume_ptid = inferior_ptid;
}
+ else if ((scheduler_mode == schedlock_replay)
+ && target_record_will_replay (minus_one_ptid, execution_direction))
+ {
+ /* User-settable 'scheduler' mode requires solo thread resume in replay
+ mode. */
+ resume_ptid = inferior_ptid;
+ }
else if (!sched_multi && target_supports_multi_process ())
{
/* Resume all threads of the current process (and none of other
void
clear_proceed_status (int step)
{
+ /* With scheduler-locking replay, stop replaying other threads if we're
+ not replaying the user-visible resume ptid.
+
+ This is a convenience feature to not require the user to explicitly
+ stop replaying the other threads. We're assuming that the user's
+ intent is to resume tracing the recorded process. */
+ if (!non_stop && scheduler_mode == schedlock_replay
+ && target_record_is_replaying (minus_one_ptid)
+ && !target_record_will_replay (user_visible_resume_ptid (step),
+ execution_direction))
+ target_record_stop_replaying ();
+
if (!non_stop)
{
struct thread_info *tp;
inferior->control.stop_soon = NO_STOP_QUIETLY;
}
- stop_after_trap = 0;
-
observer_notify_about_to_proceed ();
}
{
return (scheduler_mode == schedlock_on
|| (scheduler_mode == schedlock_step
- && tp->control.stepping_command));
+ && tp->control.stepping_command)
+ || (scheduler_mode == schedlock_replay
+ && target_record_will_replay (minus_one_ptid,
+ execution_direction)));
}
/* Basic routine for continuing the program in various fashions.
}
}
+/* A cleanup that restores the execution direction to the value saved
+ in *ARG. */
+
+static void
+restore_execution_direction (void *arg)
+{
+ enum exec_direction_kind *save_exec_dir = (enum exec_direction_kind *) arg;
+
+ execution_direction = *save_exec_dir;
+}
+
/* Asynchronous version of wait_for_inferior. It is called by the
event loop whenever a change of state is detected on the file
descriptor corresponding to the target. It can be called more than
struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
struct cleanup *ts_old_chain;
int was_sync = sync_execution;
+ enum exec_direction_kind save_exec_dir = execution_direction;
int cmd_done = 0;
ptid_t waiton_ptid = minus_one_ptid;
event. */
target_dcache_invalidate ();
- make_cleanup_restore_integer (&execution_direction);
+ make_cleanup (restore_execution_direction, &save_exec_dir);
execution_direction = target_execution_direction ();
ecs->ptid = do_target_wait (waiton_ptid, &ecs->ws,
return;
}
- if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP
- && stop_after_trap)
- {
- if (!ptid_equal (ecs->ptid, inferior_ptid))
- context_switch (ecs->ptid);
- if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: stopped\n");
- stop_print_frame = 0;
- stop_waiting (ecs);
- return;
- }
-
/* This originates from attach_command(). We need to overwrite
the stop_signal here, because some kernels don't ignore a
SIGSTOP in a subsequent ptrace(PTRACE_CONT,SIGSTOP) call.
static void
restore_current_uiout_cleanup (void *arg)
{
- struct ui_out *saved_uiout = arg;
+ struct ui_out *saved_uiout = (struct ui_out *) arg;
current_uiout = saved_uiout;
}
static struct stop_context *
save_stop_context (void)
{
- struct stop_context *sc = xmalloc (sizeof (struct stop_context));
+ struct stop_context *sc = XNEW (struct stop_context);
sc->stop_id = get_stop_id ();
sc->ptid = inferior_ptid;
static void
release_stop_context_cleanup (void *arg)
{
- struct stop_context *sc = arg;
+ struct stop_context *sc = (struct stop_context *) arg;
if (sc->thread != NULL)
sc->thread->refcount--;
size_t len = TYPE_LENGTH (type);
struct cleanup *back_to;
- siginfo_data = xmalloc (len);
+ siginfo_data = (gdb_byte *) xmalloc (len);
back_to = make_cleanup (xfree, siginfo_data);
if (target_read (¤t_target, TARGET_OBJECT_SIGNAL_INFO, NULL,
static void
do_restore_infcall_suspend_state_cleanup (void *state)
{
- restore_infcall_suspend_state (state);
+ restore_infcall_suspend_state ((struct infcall_suspend_state *) state);
}
struct cleanup *
/* Other fields: */
enum stop_stack_kind stop_stack_dummy;
int stopped_by_random_signal;
- int stop_after_trap;
/* ID if the selected frame when the inferior function call was made. */
struct frame_id selected_frame_id;
/* Other fields: */
inf_status->stop_stack_dummy = stop_stack_dummy;
inf_status->stopped_by_random_signal = stopped_by_random_signal;
- inf_status->stop_after_trap = stop_after_trap;
inf_status->selected_frame_id = get_frame_id (get_selected_frame (NULL));
/* Other fields: */
stop_stack_dummy = inf_status->stop_stack_dummy;
stopped_by_random_signal = inf_status->stopped_by_random_signal;
- stop_after_trap = inf_status->stop_after_trap;
if (target_has_stack)
{
static void
do_restore_infcall_control_state_cleanup (void *sts)
{
- restore_infcall_control_state (sts);
+ restore_infcall_control_state ((struct infcall_control_state *) sts);
}
struct cleanup *
static void
restore_inferior_ptid (void *arg)
{
- ptid_t *saved_ptid_ptr = arg;
+ ptid_t *saved_ptid_ptr = (ptid_t *) arg;
inferior_ptid = *saved_ptid_ptr;
xfree (arg);
Set exec-direction / show exec-direction commands
(returns error unless target implements to_set_exec_direction method). */
-int execution_direction = EXEC_FORWARD;
+enum exec_direction_kind execution_direction = EXEC_FORWARD;
static const char exec_forward[] = "forward";
static const char exec_reverse[] = "reverse";
static const char *exec_direction = exec_forward;
scheduler_enums, &scheduler_mode, _("\
Set mode for locking scheduler during execution."), _("\
Show mode for locking scheduler during execution."), _("\
-off == no locking (threads may preempt at any time)\n\
-on == full locking (no thread except the current thread may run)\n\
-step == scheduler locked during stepping commands (step, next, stepi, nexti).\n\
- In this mode, other threads may run during other commands."),
+off == no locking (threads may preempt at any time)\n\
+on == full locking (no thread except the current thread may run)\n\
+ This applies to both normal execution and replay mode.\n\
+step == scheduler locked during stepping commands (step, next, stepi, nexti).\n\
+ In this mode, other threads may run during other commands.\n\
+ This applies to both normal execution and replay mode.\n\
+replay == scheduler locked in replay mode and unlocked during normal execution."),
set_schedlock_func, /* traps on target vector */
show_scheduler_mode,
&setlist, &showlist);
projects / deliverable / binutils-gdb.git / blobdiff