mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
f96a85e0fe
Rework 57e1651557 ("hurd: Avoid PLT ref for __pthread_get_cleanup_stack")
to keep the __pthread_get_cleanup_stack symbol.
* htl/pt-cleanup.c (__pthread_get_cleanup_stack): Rename to
___pthread_get_cleanup_stack.
(__pthread_get_cleanup_stack): Remove hidden def, add alias.
* htl/pt-exit.c (__pthread_exit): Use ___pthread_get_cleanup_stack
instead of __pthread_get_cleanup_stack.
* sysdeps/htl/pthread-functions.h [libpthread]
(__pthread_get_cleanup_stack): Remove hidden proto.
* sysdeps/htl/pthreadP.h (___pthread_get_cleanup_stack): Add
prototype.
* sysdeps/htl/pthreadP.h (___pthread_get_cleanup_stack): Add hidden
attribute.
* htl/pt-join.c (__pthread_get_cleanup_stack): Define to
___pthread_get_cleanup_stack.
113 lines
3.4 KiB
C
113 lines
3.4 KiB
C
/* Thread termination.
|
|
Copyright (C) 2000-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <pt-internal.h>
|
|
#include <pthreadP.h>
|
|
|
|
#include <atomic.h>
|
|
|
|
|
|
/* Terminate the current thread and make STATUS available to any
|
|
thread that might join it. */
|
|
void
|
|
__pthread_exit (void *status)
|
|
{
|
|
struct __pthread *self = _pthread_self ();
|
|
struct __pthread_cancelation_handler **handlers;
|
|
int oldstate;
|
|
|
|
/* Run any cancelation handlers. According to POSIX, the
|
|
cancellation cleanup handlers should be called with cancellation
|
|
disabled. */
|
|
__pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &oldstate);
|
|
|
|
for (handlers = ___pthread_get_cleanup_stack ();
|
|
*handlers != NULL;
|
|
*handlers = (*handlers)->__next)
|
|
(*handlers)->__handler ((*handlers)->__arg);
|
|
|
|
__pthread_setcancelstate (oldstate, &oldstate);
|
|
|
|
/* Decrease the number of threads. We use an atomic operation to
|
|
make sure that only the last thread calls `exit'. */
|
|
if (atomic_decrement_and_test (&__pthread_total))
|
|
/* We are the last thread. */
|
|
exit (0);
|
|
|
|
/* Note that after this point the process can be terminated at any
|
|
point if another thread calls `pthread_exit' and happens to be
|
|
the last thread. */
|
|
|
|
__pthread_mutex_lock (&self->state_lock);
|
|
|
|
if (self->cancel_state == PTHREAD_CANCEL_ENABLE && self->cancel_pending)
|
|
status = PTHREAD_CANCELED;
|
|
|
|
switch (self->state)
|
|
{
|
|
default:
|
|
assert (!"Consistency error: unexpected self->state");
|
|
abort ();
|
|
break;
|
|
|
|
case PTHREAD_DETACHED:
|
|
__pthread_mutex_unlock (&self->state_lock);
|
|
|
|
break;
|
|
|
|
case PTHREAD_JOINABLE:
|
|
/* We need to stay around for a while since another thread
|
|
might want to join us. */
|
|
self->state = PTHREAD_EXITED;
|
|
|
|
/* We need to remember the exit status. A thread joining us
|
|
might ask for it. */
|
|
self->status = status;
|
|
|
|
/* Broadcast the condition. This will wake up threads that are
|
|
waiting to join us. */
|
|
__pthread_cond_broadcast (&self->state_cond);
|
|
__pthread_mutex_unlock (&self->state_lock);
|
|
|
|
break;
|
|
}
|
|
|
|
/* Destroy any thread specific data. */
|
|
__pthread_destroy_specific (self);
|
|
|
|
/* Destroy any signal state. */
|
|
__pthread_sigstate_destroy (self);
|
|
|
|
/* Self terminating requires TLS, so defer the release of the TCB until
|
|
the thread structure is reused. */
|
|
|
|
/* Release kernel resources, including the kernel thread and the stack,
|
|
and drop the self reference. */
|
|
__pthread_thread_terminate (self);
|
|
|
|
/* NOTREACHED */
|
|
abort ();
|
|
}
|
|
|
|
strong_alias (__pthread_exit, pthread_exit);
|