#include "symtab.h"
#include "frame.h"
#include "inferior.h"
-#include "exceptions.h"
#include "breakpoint.h"
#include "gdb_wait.h"
#include "gdbcore.h"
void init_thread_stepping_state (struct thread_info *tss);
-static void init_infwait_state (void);
-
static const char follow_fork_mode_child[] = "child";
static const char follow_fork_mode_parent[] = "parent";
if (info_verbose || debug_infrun)
{
- target_terminal_ours ();
+ target_terminal_ours_for_output ();
fprintf_filtered (gdb_stdlog,
- "Detaching after fork from "
- "child process %d.\n",
+ _("Detaching after %s from "
+ "child process %d.\n"),
+ has_vforked ? "vfork" : "fork",
child_pid);
}
}
if (info_verbose || debug_infrun)
{
- target_terminal_ours ();
- if (has_vforked)
- fprintf_filtered (gdb_stdlog,
- _("Attaching after process %d "
- "vfork to child process %d.\n"),
- parent_pid, child_pid);
- else
- fprintf_filtered (gdb_stdlog,
- _("Attaching after process %d "
- "fork to child process %d.\n"),
- parent_pid, child_pid);
+ target_terminal_ours_for_output ();
+ fprintf_filtered (gdb_stdlog,
+ _("Attaching after process %d "
+ "%s to child process %d.\n"),
+ parent_pid,
+ has_vforked ? "vfork" : "fork",
+ child_pid);
}
/* Add the new inferior first, so that the target_detach below
parent_inf->waiting_for_vfork_done = 0;
}
else if (detach_fork)
- target_detach (NULL, 0);
+ {
+ if (info_verbose || debug_infrun)
+ {
+ target_terminal_ours_for_output ();
+ fprintf_filtered (gdb_stdlog,
+ _("Detaching after fork from "
+ "child process %d.\n"),
+ child_pid);
+ }
+
+ target_detach (NULL, 0);
+ }
/* Note that the detach above makes PARENT_INF dangling. */
if (debug_infrun || info_verbose)
{
- target_terminal_ours ();
+ target_terminal_ours_for_output ();
if (exec)
- fprintf_filtered (gdb_stdlog,
- "Detaching vfork parent process "
- "%d after child exec.\n",
- inf->vfork_parent->pid);
+ {
+ fprintf_filtered (gdb_stdlog,
+ _("Detaching vfork parent process "
+ "%d after child exec.\n"),
+ inf->vfork_parent->pid);
+ }
else
- fprintf_filtered (gdb_stdlog,
- "Detaching vfork parent process "
- "%d after child exit.\n",
- inf->vfork_parent->pid);
+ {
+ fprintf_filtered (gdb_stdlog,
+ _("Detaching vfork parent process "
+ "%d after child exit.\n"),
+ inf->vfork_parent->pid);
+ }
}
target_detach (NULL, 0);
statement through an exec(). */
th->control.step_resume_breakpoint = NULL;
th->control.exception_resume_breakpoint = NULL;
+ th->control.single_step_breakpoints = NULL;
th->control.step_range_start = 0;
th->control.step_range_end = 0;
matically get reset there in the new process.). */
}
-/* Non-zero if we just simulating a single-step. This is needed
- because we cannot remove the breakpoints in the inferior process
- until after the `wait' in `wait_for_inferior'. */
-static int singlestep_breakpoints_inserted_p = 0;
-
-/* The thread we inserted single-step breakpoints for. */
-static ptid_t singlestep_ptid;
-
-/* PC when we started this single-step. */
-static CORE_ADDR singlestep_pc;
-
-/* Info about an instruction that is being stepped over. Invalid if
- ASPACE is NULL. */
+/* Info about an instruction that is being stepped over. */
struct step_over_info
{
- /* The instruction's address space. */
+ /* If we're stepping past a breakpoint, this is the address space
+ and address of the instruction the breakpoint is set at. We'll
+ skip inserting all breakpoints here. Valid iff ASPACE is
+ non-NULL. */
struct address_space *aspace;
-
- /* The instruction's address. */
CORE_ADDR address;
+
+ /* The instruction being stepped over triggers a nonsteppable
+ watchpoint. If true, we'll skip inserting watchpoints. */
+ int nonsteppable_watchpoint_p;
};
/* The step-over info of the location that is being stepped over.
stepping over. */
static void
-set_step_over_info (struct address_space *aspace, CORE_ADDR address)
+set_step_over_info (struct address_space *aspace, CORE_ADDR address,
+ int nonsteppable_watchpoint_p)
{
step_over_info.aspace = aspace;
step_over_info.address = address;
+ step_over_info.nonsteppable_watchpoint_p = nonsteppable_watchpoint_p;
}
/* Called when we're not longer stepping over a breakpoint / an
{
step_over_info.aspace = NULL;
step_over_info.address = 0;
+ step_over_info.nonsteppable_watchpoint_p = 0;
}
/* See infrun.h. */
step_over_info.address));
}
+/* See infrun.h. */
+
+int
+stepping_past_nonsteppable_watchpoint (void)
+{
+ return step_over_info.nonsteppable_watchpoint_p;
+}
+
+/* Returns true if step-over info is valid. */
+
+static int
+step_over_info_valid_p (void)
+{
+ return (step_over_info.aspace != NULL
+ || stepping_past_nonsteppable_watchpoint ());
+}
+
\f
/* Displaced stepping. */
if (ptid_equal (inferior_ptid, old_ptid))
inferior_ptid = new_ptid;
- if (ptid_equal (singlestep_ptid, old_ptid))
- singlestep_ptid = new_ptid;
-
for (displaced = displaced_step_inferior_states;
displaced;
displaced = displaced->next)
static void
resume_cleanups (void *ignore)
{
+ if (!ptid_equal (inferior_ptid, null_ptid))
+ delete_single_step_breakpoints (inferior_thread ());
+
normal_stop ();
}
&& 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;
}
event, displaced stepping breaks the vfork child similarly as single
step software breakpoint. */
if (use_displaced_stepping (gdbarch)
- && (tp->control.trap_expected
- || (step && gdbarch_software_single_step_p (gdbarch)))
+ && tp->control.trap_expected
&& sig == GDB_SIGNAL_0
&& !current_inferior ()->waiting_for_vfork_done)
{
at the current address, deliver the signal without stepping, and
once we arrive back at the step-resume breakpoint, actually step
over the breakpoint we originally wanted to step over. */
- if (singlestep_breakpoints_inserted_p
- && tp->control.trap_expected && sig != GDB_SIGNAL_0)
+ if (thread_has_single_step_breakpoints_set (tp)
+ && sig != GDB_SIGNAL_0
+ && step_over_info_valid_p ())
{
/* If we have nested signals or a pending signal is delivered
immediately after a handler returns, might might already have
tp->step_after_step_resume_breakpoint = 1;
}
- remove_single_step_breakpoints ();
- singlestep_breakpoints_inserted_p = 0;
+ delete_single_step_breakpoints (tp);
clear_step_over_info ();
tp->control.trap_expected = 0;
/* If STEP is set, it's a request to use hardware stepping
facilities. But in that case, we should never
use singlestep breakpoint. */
- gdb_assert (!(singlestep_breakpoints_inserted_p && step));
+ gdb_assert (!(thread_has_single_step_breakpoints_set (tp) && step));
/* Decide the set of threads to ask the target to resume. Start
by assuming everything will be resumed, than narrow the set
set_running (resume_ptid, 1);
/* Maybe resume a single thread after all. */
- if ((step || singlestep_breakpoints_inserted_p)
+ if ((step || thread_has_single_step_breakpoints_set (tp))
&& tp->control.trap_expected)
{
/* We're allowing a thread to run past a breakpoint it has
resume_ptid = inferior_ptid;
}
- if (gdbarch_cannot_step_breakpoint (gdbarch))
- {
+ if (execution_direction != EXEC_REVERSE
+ && step && breakpoint_inserted_here_p (aspace, pc))
+ {
+ /* The only case we currently need to step a breakpoint
+ instruction is when we have a signal to deliver. See
+ handle_signal_stop where we handle random signals that could
+ take out us out of the stepping range. Normally, in that
+ case we end up continuing (instead of stepping) over the
+ signal handler with a breakpoint at PC, but there are cases
+ where we should _always_ single-step, even if we have a
+ step-resume breakpoint, like when a software watchpoint is
+ set. Assuming single-stepping and delivering a signal at the
+ same time would takes us to the signal handler, then we could
+ have removed the breakpoint at PC to step over it. However,
+ some hardware step targets (like e.g., Mac OS) can't step
+ into signal handlers, and for those, we need to leave the
+ breakpoint at PC inserted, as otherwise if the handler
+ recurses and executes PC again, it'll miss the breakpoint.
+ So we leave the breakpoint inserted anyway, but we need to
+ record that we tried to step a breakpoint instruction, so
+ that adjust_pc_after_break doesn't end up confused. */
+ gdb_assert (sig != GDB_SIGNAL_0);
+
+ tp->stepped_breakpoint = 1;
+
/* Most targets can step a breakpoint instruction, thus
executing it normally. But if this one cannot, just
continue and we will hit it anyway. */
- if (step && breakpoint_inserted_here_p (aspace, pc))
+ if (gdbarch_cannot_step_breakpoint (gdbarch))
step = 0;
}
tp->suspend.stop_signal = GDB_SIGNAL_0;
/* Advise target which signals may be handled silently. If we have
- removed breakpoints because we are stepping over one (which can
- happen only if we are not using displaced stepping), we need to
- receive all signals to avoid accidentally skipping a breakpoint
- during execution of a signal handler. */
- if ((step || singlestep_breakpoints_inserted_p)
- && tp->control.trap_expected
- && !use_displaced_stepping (gdbarch))
+ removed breakpoints because we are stepping over one (in any
+ thread), we need to receive all signals to avoid accidentally
+ skipping a breakpoint during execution of a signal handler. */
+ if (step_over_info_valid_p ())
target_pass_signals (0, NULL);
else
target_pass_signals ((int) GDB_SIGNAL_LAST, signal_pass);
struct regcache *regcache = get_current_regcache ();
set_step_over_info (get_regcache_aspace (regcache),
- regcache_read_pc (regcache));
+ regcache_read_pc (regcache), 0);
}
else
clear_step_over_info ();
correctly when the inferior is stopped. */
tp->prev_pc = regcache_read_pc (get_current_regcache ());
- /* Reset to normal state. */
- init_infwait_state ();
-
/* Resume inferior. */
resume (tp->control.trap_expected || step || bpstat_should_step (),
tp->suspend.stop_signal);
target_last_wait_ptid = minus_one_ptid;
previous_inferior_ptid = inferior_ptid;
- init_infwait_state ();
/* Discard any skipped inlined frames. */
clear_inline_frame_state (minus_one_ptid);
-
- singlestep_ptid = null_ptid;
- singlestep_pc = 0;
}
\f
infwait_nonstep_watch_state
};
-/* The PTID we'll do a target_wait on.*/
-ptid_t waiton_ptid;
-
/* Current inferior wait state. */
static enum infwait_states infwait_state;
const char *stop_func_name;
int wait_some_more;
- /* We were in infwait_step_watch_state or
- infwait_nonstep_watch_state state, and the thread reported an
- event. */
- int stepped_after_stopped_by_watchpoint;
-
/* True if the event thread hit the single-step breakpoint of
another thread. Thus the event doesn't cause a stop, the thread
needs to be single-stepped past the single-step breakpoint before
nullify_last_target_wait_ptid ();
}
-/* Callback for iterate_over_threads. */
+/* Delete the step resume, single-step and longjmp/exception resume
+ breakpoints of TP. */
-static int
-delete_step_resume_breakpoint_callback (struct thread_info *info, void *data)
+static void
+delete_thread_infrun_breakpoints (struct thread_info *tp)
{
- if (is_exited (info->ptid))
- return 0;
-
- delete_step_resume_breakpoint (info);
- delete_exception_resume_breakpoint (info);
- return 0;
+ delete_step_resume_breakpoint (tp);
+ delete_exception_resume_breakpoint (tp);
+ delete_single_step_breakpoints (tp);
}
-/* In all-stop, delete the step resume breakpoint of any thread that
- had one. In non-stop, delete the step resume breakpoint of the
- thread that just stopped. */
+/* If the target still has execution, call FUNC for each thread that
+ just stopped. In all-stop, that's all the non-exited threads; in
+ non-stop, that's the current thread, only. */
+
+typedef void (*for_each_just_stopped_thread_callback_func)
+ (struct thread_info *tp);
static void
-delete_step_thread_step_resume_breakpoint (void)
+for_each_just_stopped_thread (for_each_just_stopped_thread_callback_func func)
{
- if (!target_has_execution
- || ptid_equal (inferior_ptid, null_ptid))
- /* If the inferior has exited, we have already deleted the step
- resume breakpoints out of GDB's lists. */
+ if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
return;
if (non_stop)
{
- /* If in non-stop mode, only delete the step-resume or
- longjmp-resume breakpoint of the thread that just stopped
- stepping. */
- struct thread_info *tp = inferior_thread ();
-
- delete_step_resume_breakpoint (tp);
- delete_exception_resume_breakpoint (tp);
+ /* If in non-stop mode, only the current thread stopped. */
+ func (inferior_thread ());
}
else
- /* In all-stop mode, delete all step-resume and longjmp-resume
- breakpoints of any thread that had them. */
- iterate_over_threads (delete_step_resume_breakpoint_callback, NULL);
+ {
+ struct thread_info *tp;
+
+ /* In all-stop mode, all threads have stopped. */
+ ALL_NON_EXITED_THREADS (tp)
+ {
+ func (tp);
+ }
+ }
+}
+
+/* Delete the step resume and longjmp/exception resume breakpoints of
+ the threads that just stopped. */
+
+static void
+delete_just_stopped_threads_infrun_breakpoints (void)
+{
+ for_each_just_stopped_thread (delete_thread_infrun_breakpoints);
+}
+
+/* Delete the single-step breakpoints of the threads that just
+ stopped. */
+
+static void
+delete_just_stopped_threads_single_step_breakpoints (void)
+{
+ for_each_just_stopped_thread (delete_single_step_breakpoints);
}
/* A cleanup wrapper. */
static void
-delete_step_thread_step_resume_breakpoint_cleanup (void *arg)
+delete_just_stopped_threads_infrun_breakpoints_cleanup (void *arg)
{
- delete_step_thread_step_resume_breakpoint ();
+ delete_just_stopped_threads_infrun_breakpoints ();
}
/* Pretty print the results of target_wait, for debugging purposes. */
fprintf_unfiltered
(gdb_stdlog, "infrun: wait_for_inferior ()\n");
- old_cleanups =
- make_cleanup (delete_step_thread_step_resume_breakpoint_cleanup, NULL);
+ old_cleanups
+ = make_cleanup (delete_just_stopped_threads_infrun_breakpoints_cleanup,
+ NULL);
while (1)
{
struct execution_control_state ecss;
struct execution_control_state *ecs = &ecss;
struct cleanup *old_chain;
+ ptid_t waiton_ptid = minus_one_ptid;
memset (ecs, 0, sizeof (*ecs));
do_cleanups (old_cleanups);
}
+/* Cleanup that reinstalls the readline callback handler, if the
+ target is running in the background. If while handling the target
+ event something triggered a secondary prompt, like e.g., a
+ pagination prompt, we'll have removed the callback handler (see
+ gdb_readline_wrapper_line). Need to do this as we go back to the
+ event loop, ready to process further input. Note this has no
+ effect if the handler hasn't actually been removed, because calling
+ rl_callback_handler_install resets the line buffer, thus losing
+ input. */
+
+static void
+reinstall_readline_callback_handler_cleanup (void *arg)
+{
+ if (async_command_editing_p && !sync_execution)
+ gdb_rl_callback_handler_reinstall ();
+}
+
/* 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 *ts_old_chain;
int was_sync = sync_execution;
int cmd_done = 0;
+ ptid_t waiton_ptid = minus_one_ptid;
memset (ecs, 0, sizeof (*ecs));
+ /* End up with readline processing input, if necessary. */
+ make_cleanup (reinstall_readline_callback_handler_cleanup, NULL);
+
/* We're handling a live event, so make sure we're doing live
debugging. If we're looking at traceframes while the target is
running, we're going to need to get back to that mode after
still for the thread which has thrown the exception. */
make_bpstat_clear_actions_cleanup ();
+ make_cleanup (delete_just_stopped_threads_infrun_breakpoints_cleanup, NULL);
+
/* Now figure out what to do with the result of the result. */
handle_inferior_event (ecs);
{
struct inferior *inf = find_inferior_pid (ptid_get_pid (ecs->ptid));
- delete_step_thread_step_resume_breakpoint ();
+ delete_just_stopped_threads_infrun_breakpoints ();
/* We may not find an inferior if this was a process exit. */
if (inf == NULL || inf->control.stop_soon == NO_STOP_QUIETLY)
void
init_thread_stepping_state (struct thread_info *tss)
{
+ tss->stepped_breakpoint = 0;
tss->stepping_over_breakpoint = 0;
+ tss->stepping_over_watchpoint = 0;
tss->step_after_step_resume_breakpoint = 0;
}
software breakpoint. In this case (prev_pc == breakpoint_pc),
we also need to back up to the breakpoint address. */
- if (singlestep_breakpoints_inserted_p
+ if (thread_has_single_step_breakpoints_set (ecs->event_thread)
|| !ptid_equal (ecs->ptid, inferior_ptid)
|| !currently_stepping (ecs->event_thread)
- || ecs->event_thread->prev_pc == breakpoint_pc)
+ || (ecs->event_thread->stepped_breakpoint
+ && ecs->event_thread->prev_pc == breakpoint_pc))
regcache_write_pc (regcache, breakpoint_pc);
do_cleanups (old_cleanups);
}
}
-static void
-init_infwait_state (void)
-{
- waiton_ptid = pid_to_ptid (-1);
- infwait_state = infwait_normal_state;
-}
-
static int
stepped_in_from (struct frame_info *frame, struct frame_id step_frame_id)
{
&& ecs->ws.kind != TARGET_WAITKIND_EXITED)
set_executing (ecs->ptid, 0);
- switch (infwait_state)
- {
- case infwait_normal_state:
- if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: infwait_normal_state\n");
- break;
-
- case infwait_step_watch_state:
- if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog,
- "infrun: infwait_step_watch_state\n");
-
- ecs->stepped_after_stopped_by_watchpoint = 1;
- break;
-
- case infwait_nonstep_watch_state:
- if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog,
- "infrun: infwait_nonstep_watch_state\n");
- insert_breakpoints ();
-
- /* FIXME-maybe: is this cleaner than setting a flag? Does it
- handle things like signals arriving and other things happening
- in combination correctly? */
- ecs->stepped_after_stopped_by_watchpoint = 1;
- break;
-
- default:
- internal_error (__FILE__, __LINE__, _("bad switch"));
- }
-
- infwait_state = infwait_normal_state;
- waiton_ptid = pid_to_ptid (-1);
-
switch (ecs->ws.kind)
{
case TARGET_WAITKIND_LOADED:
gdb_flush (gdb_stdout);
target_mourn_inferior ();
- singlestep_breakpoints_inserted_p = 0;
- cancel_single_step_breakpoints ();
stop_print_frame = 0;
stop_waiting (ecs);
return;
detach_breakpoints (ecs->ws.value.related_pid);
}
- if (singlestep_breakpoints_inserted_p)
- {
- /* Pull the single step breakpoints out of the target. */
- remove_single_step_breakpoints ();
- singlestep_breakpoints_inserted_p = 0;
- }
+ delete_just_stopped_threads_single_step_breakpoints ();
/* In case the event is caught by a catchpoint, remember that
the event is to be followed at the next resume of the thread,
if (!ptid_equal (ecs->ptid, inferior_ptid))
context_switch (ecs->ptid);
- singlestep_breakpoints_inserted_p = 0;
- cancel_single_step_breakpoints ();
-
stop_pc = regcache_read_pc (get_thread_regcache (ecs->ptid));
/* Do whatever is necessary to the parent branch of the vfork. */
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_NO_HISTORY\n");
/* Reverse execution: target ran out of history info. */
- /* Pull the single step breakpoints out of the target. */
- if (singlestep_breakpoints_inserted_p)
- {
- if (!ptid_equal (ecs->ptid, inferior_ptid))
- context_switch (ecs->ptid);
- remove_single_step_breakpoints ();
- singlestep_breakpoints_inserted_p = 0;
- }
+ delete_just_stopped_threads_single_step_breakpoints ();
stop_pc = regcache_read_pc (get_thread_regcache (ecs->ptid));
observer_notify_no_history ();
stop_waiting (ecs);
gdbarch = get_frame_arch (frame);
/* Pull the single step breakpoints out of the target. */
- if (singlestep_breakpoints_inserted_p)
+ if (gdbarch_software_single_step_p (gdbarch))
{
- /* However, before doing so, if this single-step breakpoint was
- actually for another thread, set this thread up for moving
- past it. */
- if (!ptid_equal (ecs->ptid, singlestep_ptid)
- && ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP)
+ if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP)
{
struct regcache *regcache;
struct address_space *aspace;
regcache = get_thread_regcache (ecs->ptid);
aspace = get_regcache_aspace (regcache);
pc = regcache_read_pc (regcache);
- if (single_step_breakpoint_inserted_here_p (aspace, pc))
+
+ /* However, before doing so, if this single-step breakpoint was
+ actually for another thread, set this thread up for moving
+ past it. */
+ if (!thread_has_single_step_breakpoint_here (ecs->event_thread,
+ aspace, pc))
+ {
+ if (single_step_breakpoint_inserted_here_p (aspace, pc))
+ {
+ if (debug_infrun)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: [%s] hit another thread's "
+ "single-step breakpoint\n",
+ target_pid_to_str (ecs->ptid));
+ }
+ ecs->hit_singlestep_breakpoint = 1;
+ }
+ }
+ else
{
if (debug_infrun)
{
fprintf_unfiltered (gdb_stdlog,
- "infrun: [%s] hit step over single-step"
- " breakpoint of [%s]\n",
- target_pid_to_str (ecs->ptid),
- target_pid_to_str (singlestep_ptid));
+ "infrun: [%s] hit its "
+ "single-step breakpoint\n",
+ target_pid_to_str (ecs->ptid));
}
- ecs->hit_singlestep_breakpoint = 1;
}
}
- remove_single_step_breakpoints ();
- singlestep_breakpoints_inserted_p = 0;
+ delete_just_stopped_threads_single_step_breakpoints ();
}
- if (ecs->stepped_after_stopped_by_watchpoint)
+ if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP
+ && ecs->event_thread->control.trap_expected
+ && ecs->event_thread->stepping_over_watchpoint)
stopped_by_watchpoint = 0;
else
stopped_by_watchpoint = watchpoints_triggered (&ecs->ws);
It is far more common to need to disable a watchpoint to step
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 (!target_have_steppable_watchpoint)
- {
- remove_breakpoints ();
- /* See comment in resume why we need to stop bypassing signals
- while breakpoints have been removed. */
- target_pass_signals (0, NULL);
- }
- /* Single step */
- hw_step = maybe_software_singlestep (gdbarch, stop_pc);
- target_resume (ecs->ptid, hw_step, GDB_SIGNAL_0);
- waiton_ptid = ecs->ptid;
- if (target_have_steppable_watchpoint)
- infwait_state = infwait_step_watch_state;
- else
- infwait_state = infwait_nonstep_watch_state;
- prepare_to_wait (ecs);
+ disable all watchpoints.
+
+ Any breakpoint at PC must also be stepped over -- if there's
+ one, it will have already triggered before the watchpoint
+ triggered, and we either already reported it to the user, or
+ it didn't cause a stop and we called keep_going. In either
+ case, if there was a breakpoint at PC, we must be trying to
+ step past it. */
+ ecs->event_thread->stepping_over_watchpoint = 1;
+ keep_going (ecs);
return;
}
+ ecs->event_thread->stepped_breakpoint = 0;
ecs->event_thread->stepping_over_breakpoint = 0;
+ ecs->event_thread->stepping_over_watchpoint = 0;
bpstat_clear (&ecs->event_thread->control.stop_bpstat);
ecs->event_thread->control.stop_step = 0;
stop_print_frame = 1;
if (random_signal)
{
/* Signal not for debugging purposes. */
- int printed = 0;
struct inferior *inf = find_inferior_pid (ptid_get_pid (ecs->ptid));
enum gdb_signal stop_signal = ecs->event_thread->suspend.stop_signal;
return;
}
- if (ecs->event_thread->control.step_range_end != 0
- && ecs->event_thread->suspend.stop_signal != GDB_SIGNAL_0
- && pc_in_thread_step_range (stop_pc, ecs->event_thread)
+ if (ecs->event_thread->suspend.stop_signal != GDB_SIGNAL_0
+ && (pc_in_thread_step_range (stop_pc, ecs->event_thread)
+ || ecs->event_thread->control.step_range_end == 1)
&& frame_id_eq (get_stack_frame_id (frame),
ecs->event_thread->control.step_stack_frame_id)
&& ecs->event_thread->control.step_resume_breakpoint == NULL)
"single-step range\n");
insert_hp_step_resume_breakpoint_at_frame (frame);
+ ecs->event_thread->step_after_step_resume_breakpoint = 1;
/* Reset trap_expected to ensure breakpoints are re-inserted. */
ecs->event_thread->control.trap_expected = 0;
keep_going (ecs);
is the third argument to the probe. */
arg_value = probe_safe_evaluate_at_pc (frame, 2);
if (arg_value)
- jmp_buf_pc = value_as_address (arg_value);
+ {
+ jmp_buf_pc = value_as_address (arg_value);
+ jmp_buf_pc = gdbarch_addr_bits_remove (gdbarch, jmp_buf_pc);
+ }
else if (!gdbarch_get_longjmp_target_p (gdbarch)
|| !gdbarch_get_longjmp_target (gdbarch,
frame, &jmp_buf_pc))
fprintf_unfiltered (gdb_stdlog,
"infrun: expected thread advanced also\n");
+ /* Clear the info of the previous step-over, as it's no
+ longer valid. It's what keep_going would do too, if
+ we called it. Must do this before trying to insert
+ the sss breakpoint, otherwise if we were previously
+ trying to step over this exact address in another
+ thread, the breakpoint ends up not installed. */
+ clear_step_over_info ();
+
insert_single_step_breakpoint (get_frame_arch (frame),
get_frame_address_space (frame),
stop_pc);
- singlestep_breakpoints_inserted_p = 1;
ecs->event_thread->control.trap_expected = 1;
- singlestep_ptid = inferior_ptid;
- singlestep_pc = stop_pc;
resume (0, GDB_SIGNAL_0);
prepare_to_wait (ecs);
{
volatile struct gdb_exception e;
struct regcache *regcache = get_current_regcache ();
+ int remove_bp;
+ int remove_wps;
/* Either the trap was not expected, but we are continuing
anyway (if we got a signal, the user asked it be passed to
(watchpoints, etc.) but the one we're stepping over, step one
instruction, and then re-insert the breakpoint when that step
is finished. */
- if ((ecs->hit_singlestep_breakpoint
- || thread_still_needs_step_over (ecs->event_thread))
- && !use_displaced_stepping (get_regcache_arch (regcache)))
+
+ remove_bp = (ecs->hit_singlestep_breakpoint
+ || thread_still_needs_step_over (ecs->event_thread));
+ remove_wps = (ecs->event_thread->stepping_over_watchpoint
+ && !target_have_steppable_watchpoint);
+
+ if (remove_bp && !use_displaced_stepping (get_regcache_arch (regcache)))
{
set_step_over_info (get_regcache_aspace (regcache),
- regcache_read_pc (regcache));
+ regcache_read_pc (regcache), remove_wps);
}
+ else if (remove_wps)
+ set_step_over_info (NULL, 0, remove_wps);
else
clear_step_over_info ();
return;
}
- ecs->event_thread->control.trap_expected
- = (ecs->event_thread->stepping_over_breakpoint
- || ecs->hit_singlestep_breakpoint);
+ ecs->event_thread->control.trap_expected = (remove_bp || remove_wps);
/* Do not deliver GDB_SIGNAL_TRAP (except when the user
explicitly specifies that such a signal should be delivered
&& last.kind != TARGET_WAITKIND_EXITED
&& inferior_thread ()->control.stop_step)
{
- /* But not if if in the middle of doing a "step n" operation for
+ /* But not if in the middle of doing a "step n" operation for
n > 1 */
if (inferior_thread ()->step_multi)
goto done;
projects / deliverable / binutils-gdb.git / blobdiff