/* Multi-process/thread control for GDB, the GNU debugger.
- Copyright (C) 1986-2019 Free Software Foundation, Inc.
+ Copyright (C) 1986-2021 Free Software Foundation, Inc.
Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
static int highest_thread_num;
-/* True if any thread is, or may be executing. We need to track this
- separately because until we fully sync the thread list, we won't
- know whether the target is fully stopped, even if we see stop
- events for all known threads, because any of those threads may have
- spawned new threads we haven't heard of yet. */
-static int threads_executing;
+/* The current/selected thread. */
+static thread_info *current_thread_;
-static int thread_alive (struct thread_info *);
+/* Returns true if THR is the current thread. */
-/* RAII type used to increase / decrease the refcount of each thread
- in a given list of threads. */
-
-class scoped_inc_dec_ref
+static bool
+is_current_thread (const thread_info *thr)
{
-public:
- explicit scoped_inc_dec_ref (const std::vector<thread_info *> &thrds)
- : m_thrds (thrds)
- {
- for (thread_info *thr : m_thrds)
- thr->incref ();
- }
-
- ~scoped_inc_dec_ref ()
- {
- for (thread_info *thr : m_thrds)
- thr->decref ();
- }
-
-private:
- const std::vector<thread_info *> &m_thrds;
-};
-
+ return thr == current_thread_;
+}
struct thread_info*
inferior_thread (void)
{
- struct thread_info *tp = find_thread_ptid (inferior_ptid);
- gdb_assert (tp);
- return tp;
+ gdb_assert (current_thread_ != nullptr);
+ return current_thread_;
}
/* Delete the breakpoint pointed at by BP_P, if there's one. */
thread_cancel_execution_command (tp);
- clear_inline_frame_state (tp->ptid);
+ clear_inline_frame_state (tp);
}
/* Set the TP's state as exited. */
static void
-set_thread_exited (thread_info *tp, int silent)
+set_thread_exited (thread_info *tp, bool silent)
{
- /* Dead threads don't need to step-over. Remove from queue. */
+ /* Dead threads don't need to step-over. Remove from chain. */
if (tp->step_over_next != NULL)
- thread_step_over_chain_remove (tp);
+ global_thread_step_over_chain_remove (tp);
if (tp->state != THREAD_EXITED)
{
struct thread_info *last;
for (last = inf->thread_list; last->next != NULL; last = last->next)
- ;
+ gdb_assert (ptid != last->ptid
+ || last->state == THREAD_EXITED);
+
+ gdb_assert (ptid != last->ptid
+ || last->state == THREAD_EXITED);
+
last->next = tp;
}
}
struct thread_info *
-add_thread_silent (ptid_t ptid)
+add_thread_silent (process_stratum_target *targ, ptid_t ptid)
{
- struct inferior *inf = find_inferior_ptid (ptid);
- gdb_assert (inf != NULL);
-
- thread_info *tp = find_thread_ptid (inf, ptid);
- if (tp)
- /* Found an old thread with the same id. It has to be dead,
- otherwise we wouldn't be adding a new thread with the same id.
- The OS is reusing this id --- delete it, and recreate a new
- one. */
- {
- /* In addition to deleting the thread, if this is the current
- thread, then we need to take care that delete_thread doesn't
- really delete the thread if it is inferior_ptid. Create a
- new template thread in the list with an invalid ptid, switch
- to it, delete the original thread, reset the new thread's
- ptid, and switch to it. */
-
- if (inferior_ptid == ptid)
- {
- thread_info *new_thr = new_thread (inf, null_ptid);
-
- /* Make switch_to_thread not read from the thread. */
- new_thr->state = THREAD_EXITED;
- switch_to_no_thread ();
+ gdb_assert (targ != nullptr);
- /* Now we can delete it. */
- delete_thread (tp);
+ inferior *inf = find_inferior_ptid (targ, ptid);
- /* Now reset its ptid, and reswitch inferior_ptid to it. */
- new_thr->ptid = ptid;
- new_thr->state = THREAD_STOPPED;
- switch_to_thread (new_thr);
-
- gdb::observers::new_thread.notify (new_thr);
-
- /* All done. */
- return new_thr;
- }
- else
- /* Just go ahead and delete it. */
- delete_thread (tp);
- }
+ /* We may have an old thread with the same id in the thread list.
+ If we do, it must be dead, otherwise we wouldn't be adding a new
+ thread with the same id. The OS is reusing this id --- delete
+ the old thread, and create a new one. */
+ thread_info *tp = find_thread_ptid (inf, ptid);
+ if (tp != nullptr)
+ delete_thread (tp);
tp = new_thread (inf, ptid);
gdb::observers::new_thread.notify (tp);
}
struct thread_info *
-add_thread_with_info (ptid_t ptid, private_thread_info *priv)
+add_thread_with_info (process_stratum_target *targ, ptid_t ptid,
+ private_thread_info *priv)
{
- struct thread_info *result = add_thread_silent (ptid);
+ thread_info *result = add_thread_silent (targ, ptid);
result->priv.reset (priv);
}
struct thread_info *
-add_thread (ptid_t ptid)
+add_thread (process_stratum_target *targ, ptid_t ptid)
{
- return add_thread_with_info (ptid, NULL);
+ return add_thread_with_info (targ, ptid, NULL);
}
private_thread_info::~private_thread_info () = default;
{
/* If this is the current thread, or there's code out there that
relies on it existing (refcount > 0) we can't delete yet. */
- return refcount () == 0 && ptid != inferior_ptid;
+ return refcount () == 0 && !is_current_thread (this);
}
/* Add TP to the end of the step-over chain LIST_P. */
}
}
-/* Remove TP from step-over chain LIST_P. */
+/* See gdbthread.h. */
-static void
-step_over_chain_remove (struct thread_info **list_p, struct thread_info *tp)
+void
+thread_step_over_chain_remove (thread_info **list_p, thread_info *tp)
{
gdb_assert (tp->step_over_next != NULL);
gdb_assert (tp->step_over_prev != NULL);
/* See gdbthread.h. */
-struct thread_info *
-thread_step_over_chain_next (struct thread_info *tp)
+thread_info *
+thread_step_over_chain_next (thread_info *chain_head, thread_info *tp)
{
- struct thread_info *next = tp->step_over_next;
+ thread_info *next = tp->step_over_next;
- return (next == step_over_queue_head ? NULL : next);
+ return next == chain_head ? NULL : next;
+}
+
+/* See gdbthread.h. */
+
+struct thread_info *
+global_thread_step_over_chain_next (struct thread_info *tp)
+{
+ return thread_step_over_chain_next (global_thread_step_over_chain_head, tp);
}
/* See gdbthread.h. */
/* See gdbthread.h. */
+int
+thread_step_over_chain_length (thread_info *tp)
+{
+ if (tp == nullptr)
+ return 0;
+
+ gdb_assert (thread_is_in_step_over_chain (tp));
+
+ int num = 1;
+
+ for (thread_info *iter = tp->step_over_next;
+ iter != tp;
+ iter = iter->step_over_next)
+ ++num;
+
+ return num;
+}
+
+/* See gdbthread.h. */
+
void
-thread_step_over_chain_enqueue (struct thread_info *tp)
+global_thread_step_over_chain_enqueue (struct thread_info *tp)
{
- step_over_chain_enqueue (&step_over_queue_head, tp);
+ infrun_debug_printf ("enqueueing thread %s in global step over chain",
+ target_pid_to_str (tp->ptid).c_str ());
+
+ step_over_chain_enqueue (&global_thread_step_over_chain_head, tp);
}
/* See gdbthread.h. */
void
-thread_step_over_chain_remove (struct thread_info *tp)
+global_thread_step_over_chain_enqueue_chain (thread_info *chain_head)
{
- step_over_chain_remove (&step_over_queue_head, tp);
+ gdb_assert (chain_head->step_over_next != nullptr);
+ gdb_assert (chain_head->step_over_prev != nullptr);
+
+ if (global_thread_step_over_chain_head == nullptr)
+ global_thread_step_over_chain_head = chain_head;
+ else
+ {
+ thread_info *global_last = global_thread_step_over_chain_head->step_over_prev;
+ thread_info *chain_last = chain_head->step_over_prev;
+
+ chain_last->step_over_next = global_thread_step_over_chain_head;
+ global_last->step_over_next = chain_head;
+ global_thread_step_over_chain_head->step_over_prev = chain_last;
+ chain_head->step_over_prev = global_last;
+ }
}
-/* Delete the thread referenced by THR. If SILENT, don't notifyi
+/* See gdbthread.h. */
+
+void
+global_thread_step_over_chain_remove (struct thread_info *tp)
+{
+ infrun_debug_printf ("removing thread %s from global step over chain",
+ target_pid_to_str (tp->ptid).c_str ());
+
+ thread_step_over_chain_remove (&global_thread_step_over_chain_head, tp);
+}
+
+/* Delete the thread referenced by THR. If SILENT, don't notify
the observer of this exit.
THR must not be NULL or a failed assertion will be raised. */
delete tp;
}
-/* Delete thread THREAD and notify of thread exit. If this is the
- current thread, don't actually delete it, but tag it as exited and
- do the notification. If this is the user selected thread, clear
- it. */
+/* See gdbthread.h. */
void
delete_thread (thread_info *thread)
return NULL;
}
-/* Find a thread_info by matching PTID. */
+/* See gdbthread.h. */
struct thread_info *
-find_thread_ptid (ptid_t ptid)
+find_thread_ptid (process_stratum_target *targ, ptid_t ptid)
{
- inferior *inf = find_inferior_ptid (ptid);
+ inferior *inf = find_inferior_ptid (targ, ptid);
if (inf == NULL)
return NULL;
return find_thread_ptid (inf, ptid);
struct thread_info *
find_thread_ptid (inferior *inf, ptid_t ptid)
{
- for (thread_info *tp : inf->threads ())
+ gdb_assert (inf != nullptr);
+
+ for (thread_info *tp : inf->non_exited_threads ())
if (tp->ptid == ptid)
return tp;
}
int
-thread_count (void)
+thread_count (process_stratum_target *proc_target)
{
- auto rng = all_threads ();
+ auto rng = all_threads (proc_target);
return std::distance (rng.begin (), rng.end ());
}
return 0;
}
-int
-in_thread_list (ptid_t ptid)
+bool
+in_thread_list (process_stratum_target *targ, ptid_t ptid)
{
- return find_thread_ptid (ptid) != nullptr;
+ return find_thread_ptid (targ, ptid) != nullptr;
}
/* Finds the first thread of the inferior. */
{
gdb_assert (inf->pid != 0);
- /* Prefer the current thread. */
- if (inf == current_inferior ())
+ /* Prefer the current thread, if there's one. */
+ if (inf == current_inferior () && inferior_ptid != null_ptid)
return inferior_thread ();
for (thread_info *tp : inf->non_exited_threads ())
}
/* Return true if TP is an active thread. */
-static int
-thread_alive (struct thread_info *tp)
+static bool
+thread_alive (thread_info *tp)
{
if (tp->state == THREAD_EXITED)
- return 0;
- if (!target_thread_alive (tp->ptid))
- return 0;
- return 1;
+ return false;
+
+ /* Ensure we're looking at the right target stack. */
+ gdb_assert (tp->inf == current_inferior ());
+
+ return target_thread_alive (tp->ptid);
+}
+
+/* Switch to thread TP if it is alive. Returns true if successfully
+ switched, false otherwise. */
+
+static bool
+switch_to_thread_if_alive (thread_info *thr)
+{
+ scoped_restore_current_thread restore_thread;
+
+ /* Switch inferior first, so that we're looking at the right target
+ stack. */
+ switch_to_inferior_no_thread (thr->inf);
+
+ if (thread_alive (thr))
+ {
+ switch_to_thread (thr);
+ restore_thread.dont_restore ();
+ return true;
+ }
+
+ return false;
}
/* See gdbthreads.h. */
void
prune_threads (void)
{
+ scoped_restore_current_thread restore_thread;
+
for (thread_info *tp : all_threads_safe ())
- if (!thread_alive (tp))
- delete_thread (tp);
+ {
+ switch_to_inferior_no_thread (tp->inf);
+
+ if (!thread_alive (tp))
+ delete_thread (tp);
+ }
}
/* See gdbthreads.h. */
delete_thread (tp);
}
-/* Return true value if stack temporaies are enabled for the thread
+/* Return true value if stack temporaries are enabled for the thread
TP. */
bool
}
void
-thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid)
+thread_change_ptid (process_stratum_target *targ,
+ ptid_t old_ptid, ptid_t new_ptid)
{
struct inferior *inf;
struct thread_info *tp;
/* It can happen that what we knew as the target inferior id
changes. E.g, target remote may only discover the remote process
pid after adding the inferior to GDB's list. */
- inf = find_inferior_ptid (old_ptid);
+ inf = find_inferior_ptid (targ, old_ptid);
inf->pid = new_ptid.pid ();
tp = find_thread_ptid (inf, old_ptid);
tp->ptid = new_ptid;
- gdb::observers::thread_ptid_changed.notify (old_ptid, new_ptid);
+ gdb::observers::thread_ptid_changed.notify (targ, old_ptid, new_ptid);
}
/* See gdbthread.h. */
void
-set_resumed (ptid_t ptid, int resumed)
+set_resumed (process_stratum_target *targ, ptid_t ptid, bool resumed)
{
- for (thread_info *tp : all_non_exited_threads (ptid))
+ for (thread_info *tp : all_non_exited_threads (targ, ptid))
tp->resumed = resumed;
}
/* Helper for set_running, that marks one thread either running or
stopped. */
-static int
-set_running_thread (struct thread_info *tp, int running)
+static bool
+set_running_thread (struct thread_info *tp, bool running)
{
- int started = 0;
+ bool started = false;
if (running && tp->state == THREAD_STOPPED)
- started = 1;
+ started = true;
tp->state = running ? THREAD_RUNNING : THREAD_STOPPED;
if (!running)
the step-over queue, so that we don't try to resume
it until the user wants it to. */
if (tp->step_over_next != NULL)
- thread_step_over_chain_remove (tp);
+ global_thread_step_over_chain_remove (tp);
}
return started;
}
void
-set_running (ptid_t ptid, int running)
+set_running (process_stratum_target *targ, ptid_t ptid, bool running)
{
/* We try not to notify the observer if no thread has actually
changed the running state -- merely to reduce the number of
multiple *running notifications just fine. */
bool any_started = false;
- for (thread_info *tp : all_non_exited_threads (ptid))
+ for (thread_info *tp : all_non_exited_threads (targ, ptid))
if (set_running_thread (tp, running))
any_started = true;
}
void
-set_executing (ptid_t ptid, int executing)
+set_executing (process_stratum_target *targ, ptid_t ptid, bool executing)
{
- for (thread_info *tp : all_non_exited_threads (ptid))
+ for (thread_info *tp : all_non_exited_threads (targ, ptid))
set_executing_thread (tp, executing);
/* It only takes one running thread to spawn more threads. */
if (executing)
- threads_executing = 1;
+ targ->threads_executing = true;
/* Only clear the flag if the caller is telling us everything is
stopped. */
else if (minus_one_ptid == ptid)
- threads_executing = 0;
+ targ->threads_executing = false;
}
/* See gdbthread.h. */
-int
-threads_are_executing (void)
+bool
+threads_are_executing (process_stratum_target *target)
{
- return threads_executing;
+ return target->threads_executing;
}
void
-set_stop_requested (ptid_t ptid, int stop)
+set_stop_requested (process_stratum_target *targ, ptid_t ptid, bool stop)
{
- for (thread_info *tp : all_non_exited_threads (ptid))
+ for (thread_info *tp : all_non_exited_threads (targ, ptid))
tp->stop_requested = stop;
/* Call the stop requested observer so other components of GDB can
}
void
-finish_thread_state (ptid_t ptid)
+finish_thread_state (process_stratum_target *targ, ptid_t ptid)
{
bool any_started = false;
- for (thread_info *tp : all_non_exited_threads (ptid))
+ for (thread_info *tp : all_non_exited_threads (targ, ptid))
if (set_running_thread (tp, tp->executing))
any_started = true;
gdb::optional<ui_out_emit_list> list_emitter;
gdb::optional<ui_out_emit_table> table_emitter;
+ /* We'll be switching threads temporarily below. */
+ scoped_restore_current_thread restore_thread;
+
if (uiout->is_mi_like_p ())
list_emitter.emplace (uiout, "threads");
else
if (!uiout->is_mi_like_p ())
{
+ /* Switch inferiors so we're looking at the right
+ target stack. */
+ switch_to_inferior_no_thread (tp->inf);
+
target_id_col_width
= std::max (target_id_col_width,
thread_target_id_str (tp).size ());
uiout->table_body ();
}
- /* We'll be switching threads temporarily. */
- scoped_restore_current_thread restore_thread;
-
for (inferior *inf : all_inferiors ())
for (thread_info *tp : inf->threads ())
- {
- int core;
+ {
+ int core;
- any_thread = true;
- if (tp == current_thread && tp->state == THREAD_EXITED)
- current_exited = true;
+ any_thread = true;
+ if (tp == current_thread && tp->state == THREAD_EXITED)
+ current_exited = true;
- if (!should_print_thread (requested_threads, default_inf_num,
- global_ids, pid, tp))
- continue;
+ if (!should_print_thread (requested_threads, default_inf_num,
+ global_ids, pid, tp))
+ continue;
- ui_out_emit_tuple tuple_emitter (uiout, NULL);
+ ui_out_emit_tuple tuple_emitter (uiout, NULL);
- if (!uiout->is_mi_like_p ())
- {
- if (tp == current_thread)
- uiout->field_string ("current", "*");
- else
- uiout->field_skip ("current");
+ if (!uiout->is_mi_like_p ())
+ {
+ if (tp == current_thread)
+ uiout->field_string ("current", "*");
+ else
+ uiout->field_skip ("current");
- uiout->field_string ("id-in-tg", print_thread_id (tp));
- }
+ uiout->field_string ("id-in-tg", print_thread_id (tp));
+ }
- if (show_global_ids || uiout->is_mi_like_p ())
- uiout->field_signed ("id", tp->global_num);
+ if (show_global_ids || uiout->is_mi_like_p ())
+ uiout->field_signed ("id", tp->global_num);
- /* For the CLI, we stuff everything into the target-id field.
- This is a gross hack to make the output come out looking
- correct. The underlying problem here is that ui-out has no
- way to specify that a field's space allocation should be
- shared by several fields. For MI, we do the right thing
- instead. */
+ /* Switch to the thread (and inferior / target). */
+ switch_to_thread (tp);
- if (uiout->is_mi_like_p ())
- {
- uiout->field_string ("target-id", target_pid_to_str (tp->ptid));
+ /* For the CLI, we stuff everything into the target-id field.
+ This is a gross hack to make the output come out looking
+ correct. The underlying problem here is that ui-out has no
+ way to specify that a field's space allocation should be
+ shared by several fields. For MI, we do the right thing
+ instead. */
- const char *extra_info = target_extra_thread_info (tp);
- if (extra_info != nullptr)
- uiout->field_string ("details", extra_info);
+ if (uiout->is_mi_like_p ())
+ {
+ uiout->field_string ("target-id", target_pid_to_str (tp->ptid));
- const char *name = (tp->name != nullptr
- ? tp->name
- : target_thread_name (tp));
- if (name != NULL)
- uiout->field_string ("name", name);
- }
- else
- {
- uiout->field_string ("target-id",
- thread_target_id_str (tp).c_str ());
- }
+ const char *extra_info = target_extra_thread_info (tp);
+ if (extra_info != nullptr)
+ uiout->field_string ("details", extra_info);
- if (tp->state == THREAD_RUNNING)
- uiout->text ("(running)\n");
- else
- {
- /* The switch below puts us at the top of the stack (leaf
- frame). */
- switch_to_thread (tp);
- print_stack_frame (get_selected_frame (NULL),
- /* For MI output, print frame level. */
- uiout->is_mi_like_p (),
- LOCATION, 0);
- }
+ const char *name = (tp->name != nullptr
+ ? tp->name
+ : target_thread_name (tp));
+ if (name != NULL)
+ uiout->field_string ("name", name);
+ }
+ else
+ {
+ uiout->field_string ("target-id", thread_target_id_str (tp));
+ }
- if (uiout->is_mi_like_p ())
- {
- const char *state = "stopped";
+ if (tp->state == THREAD_RUNNING)
+ uiout->text ("(running)\n");
+ else
+ {
+ /* The switch above put us at the top of the stack (leaf
+ frame). */
+ print_stack_frame (get_selected_frame (NULL),
+ /* For MI output, print frame level. */
+ uiout->is_mi_like_p (),
+ LOCATION, 0);
+ }
- if (tp->state == THREAD_RUNNING)
- state = "running";
- uiout->field_string ("state", state);
- }
+ if (uiout->is_mi_like_p ())
+ {
+ const char *state = "stopped";
- core = target_core_of_thread (tp->ptid);
- if (uiout->is_mi_like_p () && core != -1)
- uiout->field_signed ("core", core);
- }
+ if (tp->state == THREAD_RUNNING)
+ state = "running";
+ uiout->field_string ("state", state);
+ }
+
+ core = target_core_of_thread (tp->ptid);
+ if (uiout->is_mi_like_p () && core != -1)
+ uiout->field_signed ("core", core);
+ }
/* This end scope restores the current thread and the frame
selected before the "info threads" command, and it finishes the
set_current_program_space (inf->pspace);
set_current_inferior (inf);
- inferior_ptid = thread->ptid;
+ current_thread_ = thread;
+ inferior_ptid = current_thread_->ptid;
}
/* See gdbthread.h. */
void
switch_to_no_thread ()
{
- if (inferior_ptid == null_ptid)
+ if (current_thread_ == nullptr)
return;
+ current_thread_ = nullptr;
inferior_ptid = null_ptid;
reinit_frame_cache ();
}
{
gdb_assert (thr != NULL);
- if (inferior_ptid == thr->ptid)
+ if (is_current_thread (thr))
return;
switch_to_thread_no_regs (thr);
/* See gdbsupport/common-gdbthread.h. */
void
-switch_to_thread (ptid_t ptid)
+switch_to_thread (process_stratum_target *proc_target, ptid_t ptid)
{
- thread_info *thr = find_thread_ptid (ptid);
+ thread_info *thr = find_thread_ptid (proc_target, ptid);
switch_to_thread (thr);
}
-static void
-restore_selected_frame (struct frame_id a_frame_id, int frame_level)
-{
- struct frame_info *frame = NULL;
- int count;
-
- /* This means there was no selected frame. */
- if (frame_level == -1)
- {
- select_frame (NULL);
- return;
- }
+/* See frame.h. */
- gdb_assert (frame_level >= 0);
-
- /* Restore by level first, check if the frame id is the same as
- expected. If that fails, try restoring by frame id. If that
- fails, nothing to do, just warn the user. */
-
- count = frame_level;
- frame = find_relative_frame (get_current_frame (), &count);
- if (count == 0
- && frame != NULL
- /* The frame ids must match - either both valid or both outer_frame_id.
- The latter case is not failsafe, but since it's highly unlikely
- the search by level finds the wrong frame, it's 99.9(9)% of
- the time (for all practical purposes) safe. */
- && frame_id_eq (get_frame_id (frame), a_frame_id))
- {
- /* Cool, all is fine. */
- select_frame (frame);
- return;
- }
-
- frame = frame_find_by_id (a_frame_id);
- if (frame != NULL)
- {
- /* Cool, refound it. */
- select_frame (frame);
- return;
- }
-
- /* Nothing else to do, the frame layout really changed. Select the
- innermost stack frame. */
- select_frame (get_current_frame ());
-
- /* Warn the user. */
- if (frame_level > 0 && !current_uiout->is_mi_like_p ())
- {
- warning (_("Couldn't restore frame #%d in "
- "current thread. Bottom (innermost) frame selected:"),
- frame_level);
- /* For MI, we should probably have a notification about
- current frame change. But this error is not very
- likely, so don't bother for now. */
- print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
- }
-}
-
-scoped_restore_current_thread::~scoped_restore_current_thread ()
+void
+scoped_restore_current_thread::restore ()
{
/* If an entry of thread_info was previously selected, it won't be
deleted because we've increased its refcount. The thread represented
in the mean time exited (or killed, detached, etc.), then don't revert
back to it, but instead simply drop back to no thread selected. */
&& m_inf->pid != 0)
- switch_to_thread (m_thread);
+ switch_to_thread (m_thread.get ());
else
- {
- switch_to_no_thread ();
- set_current_inferior (m_inf);
- }
+ switch_to_inferior_no_thread (m_inf.get ());
/* The running state of the originally selected thread may have
changed, so we have to recheck it here. */
if (inferior_ptid != null_ptid
&& m_was_stopped
&& m_thread->state == THREAD_STOPPED
- && target_has_registers
- && target_has_stack
- && target_has_memory)
+ && target_has_registers ()
+ && target_has_stack ()
+ && target_has_memory ())
restore_selected_frame (m_selected_frame_id, m_selected_frame_level);
- if (m_thread != NULL)
- m_thread->decref ();
- m_inf->decref ();
+ set_language (m_lang);
+}
+
+scoped_restore_current_thread::~scoped_restore_current_thread ()
+{
+ if (!m_dont_restore)
+ restore ();
}
scoped_restore_current_thread::scoped_restore_current_thread ()
{
- m_thread = NULL;
- m_inf = current_inferior ();
+ m_inf = inferior_ref::new_reference (current_inferior ());
+
+ m_lang = current_language->la_language;
if (inferior_ptid != null_ptid)
{
- thread_info *tp = inferior_thread ();
- struct frame_info *frame;
-
- m_was_stopped = tp->state == THREAD_STOPPED;
- if (m_was_stopped
- && target_has_registers
- && target_has_stack
- && target_has_memory)
- {
- /* When processing internal events, there might not be a
- selected frame. If we naively call get_selected_frame
- here, then we can end up reading debuginfo for the
- current frame, but we don't generally need the debuginfo
- at this point. */
- frame = get_selected_frame_if_set ();
- }
- else
- frame = NULL;
-
- m_selected_frame_id = get_frame_id (frame);
- m_selected_frame_level = frame_relative_level (frame);
+ m_thread = thread_info_ref::new_reference (inferior_thread ());
- tp->incref ();
- m_thread = tp;
+ m_was_stopped = m_thread->state == THREAD_STOPPED;
+ save_selected_frame (&m_selected_frame_id, &m_selected_frame_level);
}
-
- m_inf->incref ();
}
/* See gdbthread.h. */
ascending order. */
static bool
-tp_array_compar_ascending (const thread_info *a, const thread_info *b)
+tp_array_compar_ascending (const thread_info_ref &a, const thread_info_ref &b)
{
if (a->inf->num != b->inf->num)
return a->inf->num < b->inf->num;
descending order. */
static bool
-tp_array_compar_descending (const thread_info *a, const thread_info *b)
+tp_array_compar_descending (const thread_info_ref &a, const thread_info_ref &b)
{
if (a->inf->num != b->inf->num)
return a->inf->num > b->inf->num;
return (a->per_inf_num > b->per_inf_num);
}
-/* Switch to thread THR and execute CMD.
+/* Assuming that THR is the current thread, execute CMD.
FLAGS.QUIET controls the printing of the thread information.
- FLAGS.CONT and FLAGS.SILENT control how to handle errors. */
+ FLAGS.CONT and FLAGS.SILENT control how to handle errors. Can throw an
+ exception if !FLAGS.SILENT and !FLAGS.CONT and CMD fails. */
static void
thr_try_catch_cmd (thread_info *thr, const char *cmd, int from_tty,
const qcs_flags &flags)
{
- switch_to_thread (thr);
+ gdb_assert (is_current_thread (thr));
+
+ /* The thread header is computed before running the command since
+ the command can change the inferior, which is not permitted
+ by thread_target_id_str. */
+ std::string thr_header =
+ string_printf (_("\nThread %s (%s):\n"), print_thread_id (thr),
+ thread_target_id_str (thr).c_str ());
+
try
{
std::string cmd_result = execute_command_to_string
if (!flags.silent || cmd_result.length () > 0)
{
if (!flags.quiet)
- printf_filtered (_("\nThread %s (%s):\n"),
- print_thread_id (thr),
- target_pid_to_str (inferior_ptid).c_str ());
+ printf_filtered ("%s", thr_header.c_str ());
printf_filtered ("%s", cmd_result.c_str ());
}
}
if (!flags.silent)
{
if (!flags.quiet)
- printf_filtered (_("\nThread %s (%s):\n"),
- print_thread_id (thr),
- target_pid_to_str (inferior_ptid).c_str ());
+ printf_filtered ("%s", thr_header.c_str ());
if (flags.cont)
printf_filtered ("%s\n", ex.what ());
else
thread, in case the command is one that wipes threads. E.g.,
detach, kill, disconnect, etc., or even normally continuing
over an inferior or thread exit. */
- std::vector<thread_info *> thr_list_cpy;
+ std::vector<thread_info_ref> thr_list_cpy;
thr_list_cpy.reserve (tc);
for (thread_info *tp : all_non_exited_threads ())
- thr_list_cpy.push_back (tp);
+ thr_list_cpy.push_back (thread_info_ref::new_reference (tp));
gdb_assert (thr_list_cpy.size () == tc);
- /* Increment the refcounts, and restore them back on scope
- exit. */
- scoped_inc_dec_ref inc_dec_ref (thr_list_cpy);
-
auto *sorter = (ascending
? tp_array_compar_ascending
: tp_array_compar_descending);
scoped_restore_current_thread restore_thread;
- for (thread_info *thr : thr_list_cpy)
- if (thread_alive (thr))
- thr_try_catch_cmd (thr, cmd, from_tty, flags);
+ for (thread_info_ref &thr : thr_list_cpy)
+ if (switch_to_thread_if_alive (thr.get ()))
+ thr_try_catch_cmd (thr.get (), cmd, from_tty, flags);
}
}
continue;
}
- if (!thread_alive (tp))
+ if (!switch_to_thread_if_alive (tp))
{
warning (_("Thread %s has terminated."), print_thread_id (tp));
continue;
static void
taas_command (const char *cmd, int from_tty)
{
+ if (cmd == NULL || *cmd == '\0')
+ error (_("Please specify a command to apply on all threads"));
std::string expanded = std::string ("thread apply all -s ") + cmd;
execute_command (expanded.c_str (), from_tty);
}
static void
tfaas_command (const char *cmd, int from_tty)
{
+ if (cmd == NULL || *cmd == '\0')
+ error (_("Please specify a command to apply on all frames of all threads"));
std::string expanded
= std::string ("thread apply all -s -- frame apply all -s ") + cmd;
execute_command (expanded.c_str (), from_tty);
if (inferior_ptid == null_ptid)
error (_("No thread selected"));
- if (target_has_stack)
+ if (target_has_stack ())
{
struct thread_info *tp = inferior_thread ();
if (tmp != 0)
error (_("Invalid regexp (%s): %s"), tmp, arg);
+ /* We're going to be switching threads. */
+ scoped_restore_current_thread restore_thread;
+
update_thread_list ();
+
for (thread_info *tp : all_threads ())
{
+ switch_to_inferior_no_thread (tp->inf);
+
if (tp->name != NULL && re_exec (tp->name))
{
printf_filtered (_("Thread %s has name '%s'\n"),
void
thread_select (const char *tidstr, thread_info *tp)
{
- if (!thread_alive (tp))
+ if (!switch_to_thread_if_alive (tp))
error (_("Thread ID %s has terminated."), tidstr);
- switch_to_thread (tp);
-
annotate_thread_changed ();
/* Since the current thread may have changed, see if there is any
exited thread we can now delete. */
- prune_threads ();
+ delete_exited_threads ();
}
/* Print thread and frame switch command response. */
uiout->text ("[Switching to thread ");
uiout->field_string ("new-thread-id", print_thread_id (tp));
uiout->text (" (");
- uiout->text (target_pid_to_str (inferior_ptid).c_str ());
+ uiout->text (target_pid_to_str (inferior_ptid));
uiout->text (")]");
}
}
}
/* Update the 'threads_executing' global based on the threads we know
- about right now. */
+ about right now. This is used by infrun to tell whether we should
+ pull events out of the current target. */
static void
update_threads_executing (void)
{
- threads_executing = 0;
- for (thread_info *tp : all_non_exited_threads ())
+ process_stratum_target *targ = current_inferior ()->process_target ();
+
+ if (targ == NULL)
+ return;
+
+ targ->threads_executing = false;
+
+ for (inferior *inf : all_non_exited_inferiors (targ))
{
- if (tp->executing)
+ if (!inf->has_execution ())
+ continue;
+
+ /* If the process has no threads, then it must be we have a
+ process-exit event pending. */
+ if (inf->thread_list == NULL)
+ {
+ targ->threads_executing = true;
+ return;
+ }
+
+ for (thread_info *tp : inf->non_exited_threads ())
{
- threads_executing = 1;
- break;
+ if (tp->executing)
+ {
+ targ->threads_executing = true;
+ return;
+ }
}
}
}
NULL
};
+void _initialize_thread ();
void
-_initialize_thread (void)
+_initialize_thread ()
{
static struct cmd_list_element *thread_apply_list = NULL;
cmd_list_element *c;
= gdb::option::build_help (_("\
Display currently known threads.\n\
Usage: info threads [OPTION]... [ID]...\n\
+If ID is given, it is a space-separated list of IDs of threads to display.\n\
+Otherwise, all threads are displayed.\n\
\n\
Options:\n\
-%OPTIONS%\
-If ID is given, it is a space-separated list of IDs of threads to display.\n\
-Otherwise, all threads are displayed."),
+%OPTIONS%"),
info_threads_opts);
c = add_info ("threads", info_threads_command, info_threads_help.c_str ());
set_cmd_completer_handle_brkchars (c, info_threads_command_completer);
- add_prefix_cmd ("thread", class_run, thread_command, _("\
+ cmd_list_element *thread_cmd
+ = add_prefix_cmd ("thread", class_run, thread_command, _("\
Use this command to switch between threads.\n\
The new thread ID must be currently known."),
- &thread_cmd_list, "thread ", 1, &cmdlist);
+ &thread_cmd_list, 1, &cmdlist);
+
+ add_com_alias ("t", thread_cmd, class_run, 1);
#define THREAD_APPLY_OPTION_HELP "\
Prints per-inferior thread number and target system's thread id\n\
c = add_prefix_cmd ("apply", class_run, thread_apply_command,
thread_apply_help.c_str (),
- &thread_apply_list, "thread apply ", 1,
+ &thread_apply_list, 1,
&thread_cmd_list);
set_cmd_completer_handle_brkchars (c, thread_apply_command_completer);
Will display thread ids whose name, target ID, or extra info matches REGEXP."),
&thread_cmd_list);
- add_com_alias ("t", "thread", class_run, 1);
-
add_setshow_boolean_cmd ("thread-events", no_class,
&print_thread_events, _("\
Set printing of thread events (such as thread start and exit)."), _("\
projects / deliverable / binutils-gdb.git / blobdiff