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Replace finish_thread_state_cleanup with a RAII class

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gdb/ChangeLog:
2018-04-10  Pedro Alves  <palves@redhat.com>

	* gdbthread.h (finish_thread_state_cleanup): Delete declaration.
	(scoped_finish_thread_state): New class.
	* infcmd.c (run_command_1): Use it instead of finish_thread_state
	cleanup.
	* infrun.c (proceed, prepare_for_detach, wait_for_inferior)
	(fetch_inferior_event, normal_stop): Likewise.
	* thread.c (finish_thread_state_cleanup): Delete.
This commit is contained in:
Pedro Alves 2018-04-10 14:49:30 +01:00
parent d4ae193277
commit 731f534f91
5 changed files with 63 additions and 50 deletions
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10
gdb/ChangeLog
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@ -1,3 +1,13 @@
2018-04-10 Pedro Alves <palves@redhat.com>
* gdbthread.h (finish_thread_state_cleanup): Delete declaration.
(scoped_finish_thread_state): New class.
* infcmd.c (run_command_1): Use it instead of finish_thread_state
cleanup.
* infrun.c (proceed, prepare_for_detach, wait_for_inferior)
(fetch_inferior_event, normal_stop): Likewise.
* thread.c (finish_thread_state_cleanup): Delete.
2018-04-09 Simon Marchi <simon.marchi@polymtl.ca>
Pedro Alves <palves@redhat.com>

31
gdb/gdbthread.h
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@ -567,10 +567,33 @@ extern int threads_are_executing (void);
Notifications are only emitted if the thread state did change. */
extern void finish_thread_state (ptid_t ptid);
/* Same as FINISH_THREAD_STATE, but with an interface suitable to be
registered as a cleanup. PTID_P points to the ptid_t that is
passed to FINISH_THREAD_STATE. */
extern void finish_thread_state_cleanup (void *ptid_p);
/* Calls finish_thread_state on scope exit, unless release() is called
to disengage. */
class scoped_finish_thread_state
{
public:
explicit scoped_finish_thread_state (ptid_t ptid)
: m_ptid (ptid)
{}
~scoped_finish_thread_state ()
{
if (!m_released)
finish_thread_state (m_ptid);
}
/* Disengage. */
void release ()
{
m_released = true;
}
DISABLE_COPY_AND_ASSIGN (scoped_finish_thread_state);
private:
bool m_released = false;
ptid_t m_ptid;
};
/* Commands with a prefix of `thread'. */
extern struct cmd_list_element *thread_cmd_list;

13
gdb/infcmd.c
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@ -565,8 +565,6 @@ static void
run_command_1 (const char *args, int from_tty, enum run_how run_how)
{
const char *exec_file;
struct cleanup *old_chain;
ptid_t ptid;
struct ui_out *uiout = current_uiout;
struct target_ops *run_target;
int async_exec;
@ -655,11 +653,10 @@ run_command_1 (const char *args, int from_tty, enum run_how run_how)
events --- the frontend shouldn't see them as stopped. In
all-stop, always finish the state of all threads, as we may be
resuming more than just the new process. */
if (non_stop)
ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
else
ptid = minus_one_ptid;
old_chain = make_cleanup (finish_thread_state_cleanup, &ptid);
ptid_t finish_ptid = (non_stop
? ptid_t (current_inferior ()->pid)
: minus_one_ptid);
scoped_finish_thread_state finish_state (finish_ptid);
/* Pass zero for FROM_TTY, because at this point the "run" command
has done its thing; now we are setting up the running program. */
@ -680,7 +677,7 @@ run_command_1 (const char *args, int from_tty, enum run_how run_how)
/* Since there was no error, there's no need to finish the thread
states here. */
discard_cleanups (old_chain);
finish_state.release ();
}
static void

49
gdb/infrun.c
View File

@ -2979,7 +2979,6 @@ proceed (CORE_ADDR addr, enum gdb_signal siggnal)
ptid_t resume_ptid;
struct execution_control_state ecss;
struct execution_control_state *ecs = &ecss;
struct cleanup *old_chain;
int started;
/* If we're stopped at a fork/vfork, follow the branch set by the
@ -3043,7 +3042,7 @@ proceed (CORE_ADDR addr, enum gdb_signal siggnal)
/* 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. */
old_chain = make_cleanup (finish_thread_state_cleanup, &resume_ptid);
scoped_finish_thread_state finish_state (resume_ptid);
/* Even if RESUME_PTID is a wildcard, and we end up resuming fewer
threads (e.g., we might need to set threads stepping over
@ -3198,7 +3197,7 @@ proceed (CORE_ADDR addr, enum gdb_signal siggnal)
target_commit_resume ();
discard_cleanups (old_chain);
finish_state.release ();
/* Tell the event loop to wait for it to stop. If the target
supports asynchronous execution, it'll do this from within
@ -3641,7 +3640,6 @@ prepare_for_detach (void)
while (!ptid_equal (displaced->step_ptid, null_ptid))
{
struct cleanup *old_chain_2;
struct execution_control_state ecss;
struct execution_control_state *ecs;
@ -3663,14 +3661,13 @@ prepare_for_detach (void)
/* If an error happens while handling the event, propagate GDB's
knowledge of the executing state to the frontend/user running
state. */
old_chain_2 = make_cleanup (finish_thread_state_cleanup,
&minus_one_ptid);
scoped_finish_thread_state finish_state (minus_one_ptid);
/* Now figure out what to do with the result of the result. */
handle_inferior_event (ecs);
/* No error, don't finish the state yet. */
discard_cleanups (old_chain_2);
finish_state.release ();
/* Breakpoints and watchpoints are not installed on the target
at this point, and signals are passed directly to the
@ -3696,7 +3693,6 @@ void
wait_for_inferior (void)
{
struct cleanup *old_cleanups;
struct cleanup *thread_state_chain;
if (debug_infrun)
fprintf_unfiltered
@ -3709,7 +3705,7 @@ wait_for_inferior (void)
/* If an error happens while handling the event, propagate GDB's
knowledge of the executing state to the frontend/user running
state. */
thread_state_chain = make_cleanup (finish_thread_state_cleanup, &minus_one_ptid);
scoped_finish_thread_state finish_state (minus_one_ptid);
while (1)
{
@ -3740,7 +3736,7 @@ wait_for_inferior (void)
}
/* No error, don't finish the state yet. */
discard_cleanups (thread_state_chain);
finish_state.release ();
do_cleanups (old_cleanups);
}
@ -3859,7 +3855,6 @@ fetch_inferior_event (void *client_data)
struct execution_control_state ecss;
struct execution_control_state *ecs = &ecss;
struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
struct cleanup *ts_old_chain;
int cmd_done = 0;
ptid_t waiton_ptid = minus_one_ptid;
@ -3912,14 +3907,12 @@ fetch_inferior_event (void *client_data)
/* If an error happens while handling the event, propagate GDB's
knowledge of the executing state to the frontend/user running
state. */
if (!target_is_non_stop_p ())
ts_old_chain = make_cleanup (finish_thread_state_cleanup, &minus_one_ptid);
else
ts_old_chain = make_cleanup (finish_thread_state_cleanup, &ecs->ptid);
ptid_t finish_ptid = !target_is_non_stop_p () ? minus_one_ptid : ecs->ptid;
scoped_finish_thread_state finish_state (finish_ptid);
/* Get executed before make_cleanup_restore_current_thread above to apply
still for the thread which has thrown the exception. */
make_bpstat_clear_actions_cleanup ();
struct cleanup *ts_old_chain = make_bpstat_clear_actions_cleanup ();
make_cleanup (delete_just_stopped_threads_infrun_breakpoints_cleanup, NULL);
@ -3974,9 +3967,11 @@ fetch_inferior_event (void *client_data)
}
}
/* No error, don't finish the thread states yet. */
discard_cleanups (ts_old_chain);
/* No error, don't finish the thread states yet. */
finish_state.release ();
/* Revert thread and frame. */
do_cleanups (old_chain);
@ -8165,8 +8160,6 @@ normal_stop (void)
{
struct target_waitstatus last;
ptid_t last_ptid;
struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
ptid_t pid_ptid;
get_last_target_status (&last_ptid, &last);
@ -8176,8 +8169,11 @@ normal_stop (void)
propagate GDB's knowledge of the executing state to the
frontend/user running state. A QUIT is an easy exception to see
here, so do this before any filtered output. */
gdb::optional<scoped_finish_thread_state> maybe_finish_thread_state;
if (!non_stop)
make_cleanup (finish_thread_state_cleanup, &minus_one_ptid);
maybe_finish_thread_state.emplace (minus_one_ptid);
else if (last.kind == TARGET_WAITKIND_SIGNALLED
|| last.kind == TARGET_WAITKIND_EXITED)
{
@ -8186,14 +8182,11 @@ normal_stop (void)
"checkpoint", when the current checkpoint/fork exits,
linux-fork.c automatically switches to another fork from
within target_mourn_inferior. */
if (!ptid_equal (inferior_ptid, null_ptid))
{
pid_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
make_cleanup (finish_thread_state_cleanup, &pid_ptid);
}
if (inferior_ptid != null_ptid)
maybe_finish_thread_state.emplace (ptid_t (inferior_ptid.pid ()));
}
else if (last.kind != TARGET_WAITKIND_NO_RESUMED)
make_cleanup (finish_thread_state_cleanup, &inferior_ptid);
maybe_finish_thread_state.emplace (inferior_ptid);
/* As we're presenting a stop, and potentially removing breakpoints,
update the thread list so we can tell whether there are threads
@ -8225,7 +8218,7 @@ normal_stop (void)
after this event is handled, so we're not really switching, only
informing of a stop. */
if (!non_stop
&& !ptid_equal (previous_inferior_ptid, inferior_ptid)
&& previous_inferior_ptid != inferior_ptid
&& target_has_execution
&& last.kind != TARGET_WAITKIND_SIGNALLED
&& last.kind != TARGET_WAITKIND_EXITED
@ -8266,7 +8259,7 @@ normal_stop (void)
}
/* Let the user/frontend see the threads as stopped. */
do_cleanups (old_chain);
maybe_finish_thread_state.reset ();
/* Select innermost stack frame - i.e., current frame is frame 0,
and current location is based on that. Handle the case where the

10
gdb/thread.c
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@ -1040,16 +1040,6 @@ finish_thread_state (ptid_t ptid)
gdb::observers::target_resumed.notify (ptid);
}
void
finish_thread_state_cleanup (void *arg)
{
ptid_t *ptid_p = (ptid_t *) arg;
gdb_assert (arg);
finish_thread_state (*ptid_p);
}
/* See gdbthread.h. */
void