/* Target-struct-independent code to start (run) and stop an inferior
process.
- Copyright (C) 1986-2015 Free Software Foundation, Inc.
+ Copyright (C) 1986-2016 Free Software Foundation, Inc.
This file is part of GDB.
#include "terminal.h"
#include "solist.h"
#include "event-loop.h"
+#include "thread-fsm.h"
+#include "common/enum-flags.h"
/* Prototypes for local functions */
}
}
+/* See infrun.h. */
+
+void
+mark_infrun_async_event_handler (void)
+{
+ mark_async_event_handler (infrun_async_inferior_event_token);
+}
+
/* When set, stop the 'step' command if we enter a function which has
no line number information. The normal behavior is that we step
over such function. */
fprintf_filtered (file, _("Mode of the step operation is %s.\n"), value);
}
-/* In asynchronous mode, but simulating synchronous execution. */
-
-int sync_execution = 0;
-
/* proceed and normal_stop use this to notify the user when the
inferior stopped in a different thread than it had been running
in. */
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;
if (has_vforked
&& !non_stop /* Non-stop always resumes both branches. */
- && (!target_is_async_p () || sync_execution)
+ && current_ui->prompt_state == PROMPT_BLOCKED
&& !(follow_child || detach_fork || sched_multi))
{
/* The parent stays blocked inside the vfork syscall until the
/* Detach new forked process? */
if (detach_fork)
{
- struct cleanup *old_chain;
-
/* Before detaching from the child, remove all breakpoints
from it. If we forked, then this has already been taken
care of by infrun.c. If we vforked however, any
CORE_ADDR step_range_start = 0;
CORE_ADDR step_range_end = 0;
struct frame_id step_frame_id = { 0 };
- struct interp *command_interp = NULL;
+ struct thread_fsm *thread_fsm = NULL;
if (!non_stop)
{
step_frame_id = tp->control.step_frame_id;
exception_resume_breakpoint
= clone_momentary_breakpoint (tp->control.exception_resume_breakpoint);
- command_interp = tp->control.command_interp;
+ thread_fsm = tp->thread_fsm;
/* For now, delete the parent's sr breakpoint, otherwise,
parent/child sr breakpoints are considered duplicates,
tp->control.step_range_end = 0;
tp->control.step_frame_id = null_frame_id;
delete_exception_resume_breakpoint (tp);
- tp->control.command_interp = NULL;
+ tp->thread_fsm = NULL;
}
parent = inferior_ptid;
tp->control.step_frame_id = step_frame_id;
tp->control.exception_resume_breakpoint
= exception_resume_breakpoint;
- tp->control.command_interp = command_interp;
+ tp->thread_fsm = thread_fsm;
}
else
{
struct thread_info *th, *tmp;
struct inferior *inf = current_inferior ();
int pid = ptid_get_pid (ptid);
+ ptid_t process_ptid;
/* This is an exec event that we actually wish to pay attention to.
Refresh our symbol table to the newly exec'd program, remove any
update_breakpoints_after_exec ();
/* What is this a.out's name? */
+ process_ptid = pid_to_ptid (pid);
printf_unfiltered (_("%s is executing new program: %s\n"),
- target_pid_to_str (inferior_ptid),
+ target_pid_to_str (process_ptid),
execd_pathname);
/* We've followed the inferior through an exec. Therefore, the
{
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);
}
if (follow_exec_mode_string == follow_exec_mode_new)
{
- struct program_space *pspace;
-
/* The user wants to keep the old inferior and program spaces
around. Create a new fresh one, and switch to it. */
the same ptid, which can confuse find_inferior_ptid. */
exit_inferior_num_silent (current_inferior ()->num);
- inf = add_inferior (pid);
- pspace = add_program_space (maybe_new_address_space ());
- inf->pspace = pspace;
- inf->aspace = pspace->aspace;
- add_thread (ptid);
+ inf = add_inferior_with_spaces ();
+ inf->pid = pid;
+ target_follow_exec (inf, execd_pathname);
set_current_inferior (inf);
- set_current_program_space (pspace);
+ set_current_program_space (inf->pspace);
+ add_thread (ptid);
}
else
{
/* Bit flags indicating what the thread needs to step over. */
-enum step_over_what
+enum step_over_what_flag
{
/* Step over a breakpoint. */
STEP_OVER_BREAKPOINT = 1,
expression. */
STEP_OVER_WATCHPOINT = 2
};
+DEF_ENUM_FLAGS_TYPE (enum step_over_what_flag, step_over_what);
/* Info about an instruction that is being stepped over. */
/* The instruction being stepped over triggers a nonsteppable
watchpoint. If true, we'll skip inserting watchpoints. */
int nonsteppable_watchpoint_p;
+
+ /* The thread's global number. */
+ int thread;
};
/* The step-over info of the location that is being stepped over.
static void
set_step_over_info (struct address_space *aspace, CORE_ADDR address,
- int nonsteppable_watchpoint_p)
+ int nonsteppable_watchpoint_p,
+ int thread)
{
step_over_info.aspace = aspace;
step_over_info.address = address;
step_over_info.nonsteppable_watchpoint_p = nonsteppable_watchpoint_p;
+ step_over_info.thread = thread;
}
/* 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;
+ step_over_info.thread = -1;
}
/* See infrun.h. */
/* See infrun.h. */
+int
+thread_is_stepping_over_breakpoint (int thread)
+{
+ return (step_over_info.thread != -1
+ && thread == step_over_info.thread);
+}
+
+/* See infrun.h. */
+
int
stepping_past_nonsteppable_watchpoint (void)
{
return 0;
}
+/* Return true if thread represented by PTID is doing a displaced
+ step. */
+
+static int
+displaced_step_in_progress_thread (ptid_t ptid)
+{
+ struct displaced_step_inferior_state *displaced;
+
+ gdb_assert (!ptid_equal (ptid, null_ptid));
+
+ displaced = get_displaced_stepping_state (ptid_get_pid (ptid));
+
+ return (displaced != NULL && ptid_equal (displaced->step_ptid, ptid));
+}
+
/* Return true if process PID has a thread doing a displaced step. */
static int
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);
{
struct displaced_step_inferior_state *displaced_state;
- if (ex.error != MEMORY_ERROR)
+ if (ex.error != MEMORY_ERROR
+ && ex.error != NOT_SUPPORTED_ERROR)
throw_exception (ex);
if (debug_infrun)
static void keep_going_pass_signal (struct execution_control_state *ecs);
static void prepare_to_wait (struct execution_control_state *ecs);
static int keep_going_stepped_thread (struct thread_info *tp);
-static int thread_still_needs_step_over (struct thread_info *tp);
-static void stop_all_threads (void);
+static step_over_what thread_still_needs_step_over (struct thread_info *tp);
/* Are there any pending step-over requests? If so, run all we can
now and return true. Otherwise, return false. */
{
struct execution_control_state ecss;
struct execution_control_state *ecs = &ecss;
- enum step_over_what step_what;
+ step_over_what step_what;
int must_be_in_line;
next = thread_step_over_chain_next (tp);
static void
infrun_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid)
{
- struct displaced_step_request *it;
struct displaced_step_inferior_state *displaced;
if (ptid_equal (inferior_ptid, old_ptid))
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
stop_all_threads ();
set_step_over_info (get_regcache_aspace (regcache),
- regcache_read_pc (regcache), 0);
+ regcache_read_pc (regcache), 0, tp->global_num);
step = maybe_software_singlestep (gdbarch, pc);
gdb_assert (!(thread_has_single_step_breakpoints_set (tp) && step));
/* Decide the set of threads to ask the target to resume. */
- if ((step || thread_has_single_step_breakpoints_set (tp))
- && tp->control.trap_expected)
+ if (tp->control.trap_expected)
{
/* We're allowing a thread to run past a breakpoint it has
- hit, by single-stepping the thread with the breakpoint
- removed. In which case, we need to single-step only this
- thread, and keep others stopped, as they can miss this
- breakpoint if allowed to run. */
+ hit, either by single-stepping the thread with the breakpoint
+ removed, or by displaced stepping, with the breakpoint inserted.
+ In the former case, we need to single-step only this thread,
+ and keep others stopped, as they can miss this breakpoint if
+ allowed to run. That's not really a problem for displaced
+ stepping, but, we still keep other threads stopped, in case
+ another thread is also stopped for a breakpoint waiting for
+ its turn in the displaced stepping queue. */
resume_ptid = inferior_ptid;
}
else
\f
/* Proceeding. */
+/* See infrun.h. */
+
+/* Counter that tracks number of user visible stops. This can be used
+ to tell whether a command has proceeded the inferior past the
+ current location. This allows e.g., inferior function calls in
+ breakpoint commands to not interrupt the command list. When the
+ call finishes successfully, the inferior is standing at the same
+ breakpoint as if nothing happened (and so we don't call
+ normal_stop). */
+static ULONGEST current_stop_id;
+
+/* See infrun.h. */
+
+ULONGEST
+get_stop_id (void)
+{
+ return current_stop_id;
+}
+
+/* Called when we report a user visible stop. */
+
+static void
+new_stop_id (void)
+{
+ current_stop_id++;
+}
+
/* Clear out all variables saying what to do when inferior is continued.
First do this, then set the ones you want, then call `proceed'. */
if (!signal_pass_state (tp->suspend.stop_signal))
tp->suspend.stop_signal = GDB_SIGNAL_0;
+ thread_fsm_delete (tp->thread_fsm);
+ tp->thread_fsm = NULL;
+
tp->control.trap_expected = 0;
tp->control.step_range_start = 0;
tp->control.step_range_end = 0;
tp->control.proceed_to_finish = 0;
- tp->control.command_interp = NULL;
tp->control.stepping_command = 0;
/* Discard any remaining commands or status from previous stop. */
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 ();
}
to make progress when resumed. Returns an bitwise or of enum
step_over_what bits, indicating what needs to be stepped over. */
-static int
+static step_over_what
thread_still_needs_step_over (struct thread_info *tp)
{
- struct inferior *inf = find_inferior_ptid (tp->ptid);
- int what = 0;
+ step_over_what what = 0;
if (thread_still_needs_step_over_bp (tp))
what |= STEP_OVER_BREAKPOINT;
{
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.
if (siggnal != GDB_SIGNAL_DEFAULT)
tp->suspend.stop_signal = siggnal;
- /* Record the interpreter that issued the execution command that
- caused this thread to resume. If the top level interpreter is
- MI/async, and the execution command was a CLI command
- (next/step/etc.), we'll want to print stop event output to the MI
- console channel (the stepped-to line, etc.), as if the user
- entered the execution command on a real GDB console. */
- tp->control.command_interp = command_interp ();
-
resume_ptid = user_visible_resume_ptid (tp->control.stepping_command);
/* If an exception is thrown from this point on, make sure to
discard_cleanups (old_chain);
- /* Wait for it to stop (if not standalone)
- and in any case decode why it stopped, and act accordingly. */
- /* Do this only if we are not using the event loop, or if the target
- does not support asynchronous execution. */
+ /* Tell the event loop to wait for it to stop. If the target
+ supports asynchronous execution, it'll do this from within
+ target_resume. */
if (!target_can_async_p ())
- {
- wait_for_inferior ();
- normal_stop ();
- }
+ mark_async_event_handler (infrun_async_inferior_event_token);
}
\f
have consistent output as if the stop event had been
reported. */
ecs->ptid = info->ptid;
- ecs->event_thread = find_thread_ptid (info->ptid);
+ ecs->event_thread = info;
ecs->ws.kind = TARGET_WAITKIND_STOPPED;
ecs->ws.value.sig = GDB_SIGNAL_0;
if (!ecs->wait_some_more)
{
- struct thread_info *tp;
+ /* Cancel any running execution command. */
+ thread_cancel_execution_command (info);
normal_stop ();
-
- /* Finish off the continuations. */
- tp = inferior_thread ();
- do_all_intermediate_continuations_thread (tp, 1);
- do_all_continuations_thread (tp, 1);
}
do_cleanups (old_chain);
static void
reinstall_readline_callback_handler_cleanup (void *arg)
{
- if (!interpreter_async)
+ struct ui *ui = current_ui;
+
+ if (!ui->async)
{
/* We're not going back to the top level event loop yet. Don't
install the readline callback, as it'd prep the terminal,
return;
}
- if (async_command_editing_p && !sync_execution)
+ if (ui->command_editing && ui->prompt_state != PROMPT_BLOCKED)
gdb_rl_callback_handler_reinstall ();
}
+/* Clean up the FSMs of threads that are now stopped. In non-stop,
+ that's just the event thread. In all-stop, that's all threads. */
+
+static void
+clean_up_just_stopped_threads_fsms (struct execution_control_state *ecs)
+{
+ struct thread_info *thr = ecs->event_thread;
+
+ if (thr != NULL && thr->thread_fsm != NULL)
+ thread_fsm_clean_up (thr->thread_fsm, thr);
+
+ if (!non_stop)
+ {
+ ALL_NON_EXITED_THREADS (thr)
+ {
+ if (thr->thread_fsm == NULL)
+ continue;
+ if (thr == ecs->event_thread)
+ continue;
+
+ switch_to_thread (thr->ptid);
+ thread_fsm_clean_up (thr->thread_fsm, thr);
+ }
+
+ if (ecs->event_thread != NULL)
+ switch_to_thread (ecs->event_thread->ptid);
+ }
+}
+
+/* Helper for all_uis_check_sync_execution_done that works on the
+ current UI. */
+
+static void
+check_curr_ui_sync_execution_done (void)
+{
+ struct ui *ui = current_ui;
+
+ if (ui->prompt_state == PROMPT_NEEDED
+ && ui->async
+ && !gdb_in_secondary_prompt_p (ui))
+ {
+ target_terminal_ours ();
+ observer_notify_sync_execution_done ();
+ ui_register_input_event_handler (ui);
+ }
+}
+
+/* See infrun.h. */
+
+void
+all_uis_check_sync_execution_done (void)
+{
+ struct switch_thru_all_uis state;
+
+ SWITCH_THRU_ALL_UIS (state)
+ {
+ check_curr_ui_sync_execution_done ();
+ }
+}
+
+/* See infrun.h. */
+
+void
+all_uis_on_sync_execution_starting (void)
+{
+ struct switch_thru_all_uis state;
+
+ SWITCH_THRU_ALL_UIS (state)
+ {
+ if (current_ui->prompt_state == PROMPT_NEEDED)
+ async_disable_stdin ();
+ }
+}
+
/* 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 execution_control_state *ecs = &ecss;
struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
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));
+ /* Events are always processed with the main UI as current UI. This
+ way, warnings, debug output, etc. are always consistently sent to
+ the main console. */
+ make_cleanup_restore_current_ui ();
+ current_ui = main_ui;
+
/* End up with readline processing input, if necessary. */
make_cleanup (reinstall_readline_callback_handler_cleanup, NULL);
event. */
target_dcache_invalidate ();
- make_cleanup_restore_integer (&execution_direction);
- execution_direction = target_execution_direction ();
+ scoped_restore save_exec_dir
+ = make_scoped_restore (&execution_direction, target_execution_direction ());
- ecs->ptid = do_target_wait (waiton_ptid, &ecs->ws, TARGET_WNOHANG);
+ ecs->ptid = do_target_wait (waiton_ptid, &ecs->ws,
+ target_can_async_p () ? TARGET_WNOHANG : 0);
if (debug_infrun)
print_target_wait_results (waiton_ptid, ecs->ptid, &ecs->ws);
if (!ecs->wait_some_more)
{
struct inferior *inf = find_inferior_ptid (ecs->ptid);
+ int should_stop = 1;
+ struct thread_info *thr = ecs->event_thread;
+ int should_notify_stop = 1;
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)
- normal_stop ();
-
- if (target_has_execution
- && ecs->ws.kind != TARGET_WAITKIND_NO_RESUMED
- && ecs->ws.kind != TARGET_WAITKIND_EXITED
- && ecs->ws.kind != TARGET_WAITKIND_SIGNALLED
- && ecs->event_thread->step_multi
- && ecs->event_thread->control.stop_step)
- inferior_event_handler (INF_EXEC_CONTINUE, NULL);
+ if (thr != NULL)
+ {
+ struct thread_fsm *thread_fsm = thr->thread_fsm;
+
+ if (thread_fsm != NULL)
+ should_stop = thread_fsm_should_stop (thread_fsm, thr);
+ }
+
+ if (!should_stop)
+ {
+ keep_going (ecs);
+ }
else
{
- inferior_event_handler (INF_EXEC_COMPLETE, NULL);
- cmd_done = 1;
+ clean_up_just_stopped_threads_fsms (ecs);
+
+ if (thr != NULL && thr->thread_fsm != NULL)
+ {
+ should_notify_stop
+ = thread_fsm_should_notify_stop (thr->thread_fsm);
+ }
+
+ if (should_notify_stop)
+ {
+ int proceeded = 0;
+
+ /* We may not find an inferior if this was a process exit. */
+ if (inf == NULL || inf->control.stop_soon == NO_STOP_QUIETLY)
+ proceeded = normal_stop ();
+
+ if (!proceeded)
+ {
+ inferior_event_handler (INF_EXEC_COMPLETE, NULL);
+ cmd_done = 1;
+ }
+ }
}
}
/* Revert thread and frame. */
do_cleanups (old_chain);
- /* If the inferior was in sync execution mode, and now isn't,
- restore the prompt (a synchronous execution command has finished,
- and we're ready for input). */
- if (interpreter_async && was_sync && !sync_execution)
- observer_notify_sync_execution_done ();
+ /* If a UI was in sync execution mode, and now isn't, restore its
+ prompt (a synchronous execution command has finished, and we're
+ ready for input). */
+ all_uis_check_sync_execution_done ();
if (cmd_done
- && !was_sync
&& exec_done_display_p
&& (ptid_equal (inferior_ptid, null_ptid)
|| !is_running (inferior_ptid)))
/* Set the cached copy of the last ptid/waitstatus. */
-static void
+void
set_last_target_status (ptid_t ptid, struct target_waitstatus status)
{
target_last_wait_ptid = ptid;
}
}
-/* Stop all threads. */
+/* A cleanup that disables thread create/exit events. */
static void
+disable_thread_events (void *arg)
+{
+ target_thread_events (0);
+}
+
+/* See infrun.h. */
+
+void
stop_all_threads (void)
{
/* We may need multiple passes to discover all threads. */
entry_ptid = inferior_ptid;
old_chain = make_cleanup (switch_to_thread_cleanup, &entry_ptid);
+ target_thread_events (1);
+ make_cleanup (disable_thread_events, NULL);
+
/* Request threads to stop, and then wait for the stops. Because
threads we already know about can spawn more threads while we're
trying to stop them, and we only learn about new threads when we
{
/* All resumed threads exited. */
}
- else if (ws.kind == TARGET_WAITKIND_EXITED
+ else if (ws.kind == TARGET_WAITKIND_THREAD_EXITED
+ || ws.kind == TARGET_WAITKIND_EXITED
|| ws.kind == TARGET_WAITKIND_SIGNALLED)
{
if (debug_infrun)
}
else
{
+ struct inferior *inf;
+
t = find_thread_ptid (event_ptid);
if (t == NULL)
t = add_thread (event_ptid);
t->resumed = 0;
t->control.may_range_step = 0;
+ /* This may be the first time we see the inferior report
+ a stop. */
+ inf = find_inferior_ptid (event_ptid);
+ if (inf->needs_setup)
+ {
+ switch_to_thread_no_regs (t);
+ setup_inferior (0);
+ }
+
if (ws.kind == TARGET_WAITKIND_STOPPED
&& ws.value.sig == GDB_SIGNAL_0)
{
{
enum gdb_signal sig;
struct regcache *regcache;
- struct address_space *aspace;
if (debug_infrun)
{
fprintf_unfiltered (gdb_stdlog, "infrun: stop_all_threads done\n");
}
+/* Handle a TARGET_WAITKIND_NO_RESUMED event. */
+
+static int
+handle_no_resumed (struct execution_control_state *ecs)
+{
+ struct inferior *inf;
+ struct thread_info *thread;
+
+ if (target_can_async_p ())
+ {
+ struct ui *ui;
+ int any_sync = 0;
+
+ ALL_UIS (ui)
+ {
+ if (ui->prompt_state == PROMPT_BLOCKED)
+ {
+ any_sync = 1;
+ break;
+ }
+ }
+ if (!any_sync)
+ {
+ /* There were no unwaited-for children left in the target, but,
+ we're not synchronously waiting for events either. Just
+ ignore. */
+
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: TARGET_WAITKIND_NO_RESUMED "
+ "(ignoring: bg)\n");
+ prepare_to_wait (ecs);
+ return 1;
+ }
+ }
+
+ /* Otherwise, if we were running a synchronous execution command, we
+ may need to cancel it and give the user back the terminal.
+
+ In non-stop mode, the target can't tell whether we've already
+ consumed previous stop events, so it can end up sending us a
+ no-resumed event like so:
+
+ #0 - thread 1 is left stopped
+
+ #1 - thread 2 is resumed and hits breakpoint
+ -> TARGET_WAITKIND_STOPPED
+
+ #2 - thread 3 is resumed and exits
+ this is the last resumed thread, so
+ -> TARGET_WAITKIND_NO_RESUMED
+
+ #3 - gdb processes stop for thread 2 and decides to re-resume
+ it.
+
+ #4 - gdb processes the TARGET_WAITKIND_NO_RESUMED event.
+ thread 2 is now resumed, so the event should be ignored.
+
+ IOW, if the stop for thread 2 doesn't end a foreground command,
+ then we need to ignore the following TARGET_WAITKIND_NO_RESUMED
+ event. But it could be that the event meant that thread 2 itself
+ (or whatever other thread was the last resumed thread) exited.
+
+ To address this we refresh the thread list and check whether we
+ have resumed threads _now_. In the example above, this removes
+ thread 3 from the thread list. If thread 2 was re-resumed, we
+ ignore this event. If we find no thread resumed, then we cancel
+ the synchronous command show "no unwaited-for " to the user. */
+ update_thread_list ();
+
+ ALL_NON_EXITED_THREADS (thread)
+ {
+ if (thread->executing
+ || thread->suspend.waitstatus_pending_p)
+ {
+ /* There were no unwaited-for children left in the target at
+ some point, but there are now. Just ignore. */
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: TARGET_WAITKIND_NO_RESUMED "
+ "(ignoring: found resumed)\n");
+ prepare_to_wait (ecs);
+ return 1;
+ }
+ }
+
+ /* Note however that we may find no resumed thread because the whole
+ process exited meanwhile (thus updating the thread list results
+ in an empty thread list). In this case we know we'll be getting
+ a process exit event shortly. */
+ ALL_INFERIORS (inf)
+ {
+ if (inf->pid == 0)
+ continue;
+
+ thread = any_live_thread_of_process (inf->pid);
+ if (thread == NULL)
+ {
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: TARGET_WAITKIND_NO_RESUMED "
+ "(expect process exit)\n");
+ prepare_to_wait (ecs);
+ return 1;
+ }
+ }
+
+ /* Go ahead and report the event. */
+ return 0;
+}
+
/* Given an execution control state that has been freshly filled in by
an event from the inferior, figure out what it means and take
appropriate action.
return;
}
- if (ecs->ws.kind == TARGET_WAITKIND_NO_RESUMED
- && target_can_async_p () && !sync_execution)
+ if (ecs->ws.kind == TARGET_WAITKIND_THREAD_EXITED)
{
- /* There were no unwaited-for children left in the target, but,
- we're not synchronously waiting for events either. Just
- ignore. Otherwise, if we were running a synchronous
- execution command, we need to cancel it and give the user
- back the terminal. */
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog,
- "infrun: TARGET_WAITKIND_NO_RESUMED (ignoring)\n");
+ fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_THREAD_EXITED\n");
prepare_to_wait (ecs);
return;
}
+ if (ecs->ws.kind == TARGET_WAITKIND_NO_RESUMED
+ && handle_no_resumed (ecs))
+ return;
+
/* Cache the last pid/waitstatus. */
set_last_target_status (ecs->ptid, ecs->ws);
prepare_to_wait (ecs);
return;
+ case TARGET_WAITKIND_THREAD_CREATED:
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_THREAD_CREATED\n");
+ if (!ptid_equal (ecs->ptid, inferior_ptid))
+ context_switch (ecs->ptid);
+ if (!switch_back_to_stepped_thread (ecs))
+ keep_going (ecs);
+ return;
+
case TARGET_WAITKIND_EXITED:
case TARGET_WAITKIND_SIGNALLED:
if (debug_infrun)
}
gdb_flush (gdb_stdout);
- target_mourn_inferior ();
+ target_mourn_inferior (inferior_ptid);
stop_print_frame = 0;
stop_waiting (ecs);
return;
{
struct regcache *regcache = get_thread_regcache (ecs->ptid);
struct gdbarch *gdbarch = get_regcache_arch (regcache);
- struct displaced_step_inferior_state *displaced
- = get_displaced_stepping_state (ptid_get_pid (ecs->ptid));
/* If checking displaced stepping is supported, and thread
ecs->ptid is displaced stepping. */
- if (displaced && ptid_equal (displaced->step_ptid, ecs->ptid))
+ if (displaced_step_in_progress_thread (ecs->ptid))
{
struct inferior *parent_inf
= find_inferior_ptid (ecs->ptid);
if (ecs->ws.kind == TARGET_WAITKIND_FORKED)
{
+ struct displaced_step_inferior_state *displaced
+ = get_displaced_stepping_state (ptid_get_pid (ecs->ptid));
+
/* Restore scratch pad for child process. */
displaced_step_restore (displaced, ecs->ws.value.related_pid);
}
parent = ecs->ptid;
child = ecs->ws.value.related_pid;
+ /* At this point, the parent is marked running, and the
+ child is marked stopped. */
+
+ /* If not resuming the parent, mark it stopped. */
+ if (follow_child && !detach_fork && !non_stop && !sched_multi)
+ set_running (parent, 0);
+
+ /* If resuming the child, mark it running. */
+ if (follow_child || (!detach_fork && (non_stop || sched_multi)))
+ set_running (child, 1);
+
/* In non-stop mode, also resume the other branch. */
if (!detach_fork && (non_stop
|| (sched_multi && target_is_non_stop_p ())))
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_NO_HISTORY\n");
/* Reverse execution: target ran out of history info. */
+ /* Switch to the stopped thread. */
+ if (!ptid_equal (ecs->ptid, inferior_ptid))
+ context_switch (ecs->ptid);
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog, "infrun: stopped\n");
+
delete_just_stopped_threads_single_step_breakpoints ();
- stop_pc = regcache_read_pc (get_thread_regcache (ecs->ptid));
+ stop_pc = regcache_read_pc (get_thread_regcache (inferior_ptid));
observer_notify_no_history ();
stop_waiting (ecs);
return;
restart_threads (struct thread_info *event_thread)
{
struct thread_info *tp;
- struct thread_info *step_over = NULL;
/* In case the instruction just stepped spawned a new thread. */
update_thread_list ();
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.
context_switch (ecs->ptid);
if (deprecated_context_hook)
- deprecated_context_hook (pid_to_thread_id (ecs->ptid));
+ deprecated_context_hook (ptid_to_global_thread_id (ecs->ptid));
}
/* At this point, get hold of the now-current thread's frame. */
stop_stack_dummy = what.call_dummy;
}
+ /* A few breakpoint types have callbacks associated (e.g.,
+ bp_jit_event). Run them now. */
+ bpstat_run_callbacks (ecs->event_thread->control.stop_bpstat);
+
/* If we hit an internal event that triggers symbol changes, the
current frame will be invalidated within bpstat_what (e.g., if we
hit an internal solib event). Re-fetch it. */
keep_going_stepped_thread (struct thread_info *tp)
{
struct frame_info *frame;
- struct gdbarch *gdbarch;
struct execution_control_state ecss;
struct execution_control_state *ecs = &ecss;
stop_pc = regcache_read_pc (get_thread_regcache (tp->ptid));
frame = get_current_frame ();
- gdbarch = get_frame_arch (frame);
/* If the PC of the thread we were trying to single-step has
changed, then that thread has trapped or been signaled, but the
/* set_momentary_breakpoint_at_pc invalidates FRAME. */
frame = NULL;
- bp->thread = tp->num;
+ bp->thread = tp->global_num;
inferior_thread ()->control.exception_resume_breakpoint = bp;
}
}
bp = set_momentary_breakpoint_at_pc (get_frame_arch (frame),
handler, bp_exception_resume);
- bp->thread = tp->num;
+ bp->thread = tp->global_num;
inferior_thread ()->control.exception_resume_breakpoint = bp;
}
struct regcache *regcache = get_current_regcache ();
int remove_bp;
int remove_wps;
- enum step_over_what step_what;
+ step_over_what step_what;
/* Either the trap was not expected, but we are continuing
anyway (if we got a signal, the user asked it be passed to
&& (remove_wps || !use_displaced_stepping (ecs->event_thread)))
{
set_step_over_info (get_regcache_aspace (regcache),
- regcache_read_pc (regcache), remove_wps);
+ regcache_read_pc (regcache), remove_wps,
+ ecs->event_thread->global_num);
}
else if (remove_wps)
- set_step_over_info (NULL, 0, remove_wps);
+ set_step_over_info (NULL, 0, remove_wps, -1);
/* If we now need to do an in-line step-over, we need to stop
all other threads. Note this must be done before
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: prepare_to_wait\n");
- /* This is the old end of the while loop. Let everybody know we
- want to wait for the inferior some more and get called again
- soon. */
ecs->wait_some_more = 1;
+
+ if (!target_is_async_p ())
+ mark_infrun_async_event_handler ();
}
/* We are done with the step range of a step/next/si/ni command.
}
}
+/* Some targets/architectures can do extra processing/display of
+ segmentation faults. E.g., Intel MPX boundary faults.
+ Call the architecture dependent function to handle the fault. */
+
+static void
+handle_segmentation_fault (struct ui_out *uiout)
+{
+ struct regcache *regcache = get_current_regcache ();
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+
+ if (gdbarch_handle_segmentation_fault_p (gdbarch))
+ gdbarch_handle_segmentation_fault (gdbarch, uiout);
+}
+
void
print_signal_received_reason (struct ui_out *uiout, enum gdb_signal siggnal)
{
+ struct thread_info *thr = inferior_thread ();
+
annotate_signal ();
- if (siggnal == GDB_SIGNAL_0 && !ui_out_is_mi_like_p (uiout))
+ if (ui_out_is_mi_like_p (uiout))
+ ;
+ else if (show_thread_that_caused_stop ())
{
- struct thread_info *t = inferior_thread ();
+ const char *name;
+
+ ui_out_text (uiout, "\nThread ");
+ ui_out_field_fmt (uiout, "thread-id", "%s", print_thread_id (thr));
- ui_out_text (uiout, "\n[");
- ui_out_field_string (uiout, "thread-name",
- target_pid_to_str (t->ptid));
- ui_out_field_fmt (uiout, "thread-id", "] #%d", t->num);
- ui_out_text (uiout, " stopped");
+ name = thr->name != NULL ? thr->name : target_thread_name (thr);
+ if (name != NULL)
+ {
+ ui_out_text (uiout, " \"");
+ ui_out_field_fmt (uiout, "name", "%s", name);
+ ui_out_text (uiout, "\"");
+ }
}
+ else
+ ui_out_text (uiout, "\nProgram");
+
+ if (siggnal == GDB_SIGNAL_0 && !ui_out_is_mi_like_p (uiout))
+ ui_out_text (uiout, " stopped");
else
{
- ui_out_text (uiout, "\nProgram received signal ");
+ ui_out_text (uiout, " received signal ");
annotate_signal_name ();
if (ui_out_is_mi_like_p (uiout))
ui_out_field_string
annotate_signal_string ();
ui_out_field_string (uiout, "signal-meaning",
gdb_signal_to_string (siggnal));
+
+ if (siggnal == GDB_SIGNAL_SEGV)
+ handle_segmentation_fault (uiout);
+
annotate_signal_string_end ();
}
ui_out_text (uiout, ".\n");
bpstat_print contains the logic deciding in detail what to print,
based on the event(s) that just occurred. */
-void
-print_stop_event (struct target_waitstatus *ws)
+static void
+print_stop_location (struct target_waitstatus *ws)
{
int bpstat_ret;
enum print_what source_flag;
SRC_AND_LOC: Print location and source line. */
if (do_frame_printing)
print_stack_frame (get_selected_frame (NULL), 0, source_flag, 1);
+}
+
+/* See infrun.h. */
+
+void
+print_stop_event (struct ui_out *uiout)
+{
+ struct cleanup *old_chain;
+ struct target_waitstatus last;
+ ptid_t last_ptid;
+ struct thread_info *tp;
+
+ get_last_target_status (&last_ptid, &last);
+
+ old_chain = make_cleanup_restore_current_uiout ();
+ current_uiout = uiout;
+
+ print_stop_location (&last);
/* Display the auto-display expressions. */
do_displays ();
-}
-/* Here to return control to GDB when the inferior stops for real.
- Print appropriate messages, remove breakpoints, give terminal our modes.
+ do_cleanups (old_chain);
- STOP_PRINT_FRAME nonzero means print the executing frame
- (pc, function, args, file, line number and line text).
- BREAKPOINTS_FAILED nonzero means stop was due to error
- attempting to insert breakpoints. */
+ tp = inferior_thread ();
+ if (tp->thread_fsm != NULL
+ && thread_fsm_finished_p (tp->thread_fsm))
+ {
+ struct return_value_info *rv;
+
+ rv = thread_fsm_return_value (tp->thread_fsm);
+ if (rv != NULL)
+ print_return_value (uiout, rv);
+ }
+}
+
+/* See infrun.h. */
void
+maybe_remove_breakpoints (void)
+{
+ if (!breakpoints_should_be_inserted_now () && target_has_execution)
+ {
+ if (remove_breakpoints ())
+ {
+ target_terminal_ours_for_output ();
+ printf_filtered (_("Cannot remove breakpoints because "
+ "program is no longer writable.\nFurther "
+ "execution is probably impossible.\n"));
+ }
+ }
+}
+
+/* The execution context that just caused a normal stop. */
+
+struct stop_context
+{
+ /* The stop ID. */
+ ULONGEST stop_id;
+
+ /* The event PTID. */
+
+ ptid_t ptid;
+
+ /* If stopp for a thread event, this is the thread that caused the
+ stop. */
+ struct thread_info *thread;
+
+ /* The inferior that caused the stop. */
+ int inf_num;
+};
+
+/* Returns a new stop context. If stopped for a thread event, this
+ takes a strong reference to the thread. */
+
+static struct stop_context *
+save_stop_context (void)
+{
+ struct stop_context *sc = XNEW (struct stop_context);
+
+ sc->stop_id = get_stop_id ();
+ sc->ptid = inferior_ptid;
+ sc->inf_num = current_inferior ()->num;
+
+ if (!ptid_equal (inferior_ptid, null_ptid))
+ {
+ /* Take a strong reference so that the thread can't be deleted
+ yet. */
+ sc->thread = inferior_thread ();
+ sc->thread->refcount++;
+ }
+ else
+ sc->thread = NULL;
+
+ return sc;
+}
+
+/* Release a stop context previously created with save_stop_context.
+ Releases the strong reference to the thread as well. */
+
+static void
+release_stop_context_cleanup (void *arg)
+{
+ struct stop_context *sc = (struct stop_context *) arg;
+
+ if (sc->thread != NULL)
+ sc->thread->refcount--;
+ xfree (sc);
+}
+
+/* Return true if the current context no longer matches the saved stop
+ context. */
+
+static int
+stop_context_changed (struct stop_context *prev)
+{
+ if (!ptid_equal (prev->ptid, inferior_ptid))
+ return 1;
+ if (prev->inf_num != current_inferior ()->num)
+ return 1;
+ if (prev->thread != NULL && prev->thread->state != THREAD_STOPPED)
+ return 1;
+ if (get_stop_id () != prev->stop_id)
+ return 1;
+ return 0;
+}
+
+/* See infrun.h. */
+
+int
normal_stop (void)
{
struct target_waitstatus last;
ptid_t last_ptid;
struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
ptid_t pid_ptid;
+ struct switch_thru_all_uis state;
get_last_target_status (&last_ptid, &last);
+ new_stop_id ();
+
/* If an exception is thrown from this point on, make sure to
propagate GDB's knowledge of the executing state to the
frontend/user running state. A QUIT is an easy exception to see
&& last.kind != TARGET_WAITKIND_EXITED
&& last.kind != TARGET_WAITKIND_NO_RESUMED)
{
- target_terminal_ours_for_output ();
- printf_filtered (_("[Switching to %s]\n"),
- target_pid_to_str (inferior_ptid));
- annotate_thread_changed ();
+ SWITCH_THRU_ALL_UIS (state)
+ {
+ target_terminal_ours_for_output ();
+ printf_filtered (_("[Switching to %s]\n"),
+ target_pid_to_str (inferior_ptid));
+ annotate_thread_changed ();
+ }
previous_inferior_ptid = inferior_ptid;
}
if (last.kind == TARGET_WAITKIND_NO_RESUMED)
{
- gdb_assert (sync_execution || !target_can_async_p ());
-
- target_terminal_ours_for_output ();
- printf_filtered (_("No unwaited-for children left.\n"));
+ SWITCH_THRU_ALL_UIS (state)
+ if (current_ui->prompt_state == PROMPT_BLOCKED)
+ {
+ target_terminal_ours_for_output ();
+ printf_filtered (_("No unwaited-for children left.\n"));
+ }
}
/* Note: this depends on the update_thread_list call above. */
- if (!breakpoints_should_be_inserted_now () && target_has_execution)
- {
- if (remove_breakpoints ())
- {
- target_terminal_ours_for_output ();
- printf_filtered (_("Cannot remove breakpoints because "
- "program is no longer writable.\nFurther "
- "execution is probably impossible.\n"));
- }
- }
+ maybe_remove_breakpoints ();
/* If an auto-display called a function and that got a signal,
delete that auto-display to avoid an infinite recursion. */
if (stopped_by_random_signal)
disable_current_display ();
- /* Notify observers if we finished a "step"-like command, etc. */
- if (target_has_execution
- && last.kind != TARGET_WAITKIND_SIGNALLED
- && last.kind != TARGET_WAITKIND_EXITED
- && inferior_thread ()->control.stop_step)
- {
- /* But not if in the middle of doing a "step n" operation for
- n > 1 */
- if (inferior_thread ()->step_multi)
- goto done;
-
- observer_notify_end_stepping_range ();
- }
-
- target_terminal_ours ();
- async_enable_stdin ();
-
- /* Set the current source location. This will also happen if we
- display the frame below, but the current SAL will be incorrect
- during a user hook-stop function. */
- if (has_stack_frames () && !stop_stack_dummy)
- set_current_sal_from_frame (get_current_frame ());
-
- /* Let the user/frontend see the threads as stopped, but defer to
- call_function_by_hand if the thread finished an infcall
- successfully. We may be e.g., evaluating a breakpoint condition.
- In that case, the thread had state THREAD_RUNNING before the
- infcall, and shall remain marked running, all without informing
- the user/frontend about state transition changes. */
- if (target_has_execution
- && inferior_thread ()->control.in_infcall
- && stop_stack_dummy == STOP_STACK_DUMMY)
- discard_cleanups (old_chain);
- else
- do_cleanups (old_chain);
-
- /* Look up the hook_stop and run it (CLI internally handles problem
- of stop_command's pre-hook not existing). */
- if (stop_command)
- catch_errors (hook_stop_stub, stop_command,
- "Error while running hook_stop:\n", RETURN_MASK_ALL);
-
- if (!has_stack_frames ())
- goto done;
+ SWITCH_THRU_ALL_UIS (state)
+ {
+ async_enable_stdin ();
+ }
- if (last.kind == TARGET_WAITKIND_SIGNALLED
- || last.kind == TARGET_WAITKIND_EXITED)
- goto done;
+ /* Let the user/frontend see the threads as stopped. */
+ do_cleanups (old_chain);
/* Select innermost stack frame - i.e., current frame is frame 0,
- and current location is based on that.
- Don't do this on return from a stack dummy routine,
- or if the program has exited. */
-
- if (!stop_stack_dummy)
+ and current location is based on that. Handle the case where the
+ dummy call is returning after being stopped. E.g. the dummy call
+ previously hit a breakpoint. (If the dummy call returns
+ normally, we won't reach here.) Do this before the stop hook is
+ run, so that it doesn't get to see the temporary dummy frame,
+ which is not where we'll present the stop. */
+ if (has_stack_frames ())
{
- select_frame (get_current_frame ());
+ if (stop_stack_dummy == STOP_STACK_DUMMY)
+ {
+ /* Pop the empty frame that contains the stack dummy. This
+ also restores inferior state prior to the call (struct
+ infcall_suspend_state). */
+ struct frame_info *frame = get_current_frame ();
+
+ gdb_assert (get_frame_type (frame) == DUMMY_FRAME);
+ frame_pop (frame);
+ /* frame_pop calls reinit_frame_cache as the last thing it
+ does which means there's now no selected frame. */
+ }
- /* If --batch-silent is enabled then there's no need to print the current
- source location, and to try risks causing an error message about
- missing source files. */
- if (stop_print_frame && !batch_silent)
- print_stop_event (&last);
- }
-
- if (stop_stack_dummy == STOP_STACK_DUMMY)
- {
- /* Pop the empty frame that contains the stack dummy.
- This also restores inferior state prior to the call
- (struct infcall_suspend_state). */
- struct frame_info *frame = get_current_frame ();
-
- gdb_assert (get_frame_type (frame) == DUMMY_FRAME);
- frame_pop (frame);
- /* frame_pop() calls reinit_frame_cache as the last thing it
- does which means there's currently no selected frame. We
- don't need to re-establish a selected frame if the dummy call
- returns normally, that will be done by
- restore_infcall_control_state. However, we do have to handle
- the case where the dummy call is returning after being
- stopped (e.g. the dummy call previously hit a breakpoint).
- We can't know which case we have so just always re-establish
- a selected frame here. */
select_frame (get_current_frame ());
- }
-done:
- annotate_stopped ();
+ /* Set the current source location. */
+ set_current_sal_from_frame (get_current_frame ());
+ }
- /* Suppress the stop observer if we're in the middle of:
+ /* Look up the hook_stop and run it (CLI internally handles problem
+ of stop_command's pre-hook not existing). */
+ if (stop_command != NULL)
+ {
+ struct stop_context *saved_context = save_stop_context ();
+ struct cleanup *old_chain
+ = make_cleanup (release_stop_context_cleanup, saved_context);
- - a step n (n > 1), as there still more steps to be done.
+ catch_errors (hook_stop_stub, stop_command,
+ "Error while running hook_stop:\n", RETURN_MASK_ALL);
- - a "finish" command, as the observer will be called in
- finish_command_continuation, so it can include the inferior
- function's return value.
+ /* If the stop hook resumes the target, then there's no point in
+ trying to notify about the previous stop; its context is
+ gone. Likewise if the command switches thread or inferior --
+ the observers would print a stop for the wrong
+ thread/inferior. */
+ if (stop_context_changed (saved_context))
+ {
+ do_cleanups (old_chain);
+ return 1;
+ }
+ do_cleanups (old_chain);
+ }
- - calling an inferior function, as we pretend we inferior didn't
- run at all. The return value of the call is handled by the
- expression evaluator, through call_function_by_hand. */
+ /* Notify observers about the stop. This is where the interpreters
+ print the stop event. */
+ if (!ptid_equal (inferior_ptid, null_ptid))
+ observer_notify_normal_stop (inferior_thread ()->control.stop_bpstat,
+ stop_print_frame);
+ else
+ observer_notify_normal_stop (NULL, stop_print_frame);
- if (!target_has_execution
- || last.kind == TARGET_WAITKIND_SIGNALLED
- || last.kind == TARGET_WAITKIND_EXITED
- || last.kind == TARGET_WAITKIND_NO_RESUMED
- || (!(inferior_thread ()->step_multi
- && inferior_thread ()->control.stop_step)
- && !(inferior_thread ()->control.stop_bpstat
- && inferior_thread ()->control.proceed_to_finish)
- && !inferior_thread ()->control.in_infcall))
- {
- if (!ptid_equal (inferior_ptid, null_ptid))
- observer_notify_normal_stop (inferior_thread ()->control.stop_bpstat,
- stop_print_frame);
- else
- observer_notify_normal_stop (NULL, stop_print_frame);
- }
+ annotate_stopped ();
if (target_has_execution)
{
longer needed. Keeping those around slows down things linearly.
Note that this never removes the current inferior. */
prune_inferiors ();
+
+ return 0;
}
static int
"to change these tables.\n"));
}
-/* Check if it makes sense to read $_siginfo from the current thread
- at this point. If not, throw an error. */
-
-static void
-validate_siginfo_access (void)
-{
- /* No current inferior, no siginfo. */
- if (ptid_equal (inferior_ptid, null_ptid))
- error (_("No thread selected."));
-
- /* Don't try to read from a dead thread. */
- if (is_exited (inferior_ptid))
- error (_("The current thread has terminated"));
-
- /* ... or from a spinning thread. */
- if (is_running (inferior_ptid))
- error (_("Selected thread is running."));
-}
-
/* The $_siginfo convenience variable is a bit special. We don't know
for sure the type of the value until we actually have a chance to
fetch the data. The type can change depending on gdbarch, so it is
{
LONGEST transferred;
- validate_siginfo_access ();
+ /* If we can access registers, so can we access $_siginfo. Likewise
+ vice versa. */
+ validate_registers_access ();
transferred =
target_read (¤t_target, TARGET_OBJECT_SIGNAL_INFO,
{
LONGEST transferred;
- validate_siginfo_access ();
+ /* If we can access registers, so can we access $_siginfo. Likewise
+ vice versa. */
+ validate_registers_access ();
transferred = target_write (¤t_target,
TARGET_OBJECT_SIGNAL_INFO,
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;
static void
infrun_async_inferior_event_handler (gdb_client_data data)
{
- /* If the target is closed while this event source is marked, we
- will reach here without execution, or a target to call
- target_wait on, which is an error. Instead of tracking whether
- the target has been popped already, or whether we do have threads
- with pending statutes, simply ignore the event. */
- if (!target_is_async_p ())
- return;
-
inferior_event_handler (INF_REG_EVENT, NULL);
}
signal_print[GDB_SIGNAL_WAITING] = 0;
signal_stop[GDB_SIGNAL_CANCEL] = 0;
signal_print[GDB_SIGNAL_CANCEL] = 0;
+ signal_stop[GDB_SIGNAL_LIBRT] = 0;
+ signal_print[GDB_SIGNAL_LIBRT] = 0;
/* Update cached state. */
signal_cache_update (-1);
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