0ab1bfc7b2
In some corner cases of static linking and unexpected libraries order on the linker command line, libc symbol might preempt the same libthr symbol, in which case libthr jump table points back to libc causing either infinite recursion or loop. Handle all of such symbols by using private libthr names for them, ensuring that the right pointers are installed into the table. In collaboration with: arichardson PR: 239475 Tested by: pho MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D21088
111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <signal.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include "un-namespace.h"
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#include "thr_private.h"
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#undef pthread_cleanup_push
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#undef pthread_cleanup_pop
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/* old binary compatible interfaces */
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__weak_reference(_thr_cleanup_pop, pthread_cleanup_pop);
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__weak_reference(_thr_cleanup_pop, _pthread_cleanup_pop);
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__weak_reference(_thr_cleanup_push, pthread_cleanup_push);
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__weak_reference(_thr_cleanup_push, _pthread_cleanup_push);
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/* help static linking when libc symbols have preference */
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__weak_reference(__thr_cleanup_push_imp, __pthread_cleanup_push_imp);
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__weak_reference(__thr_cleanup_pop_imp, __pthread_cleanup_pop_imp);
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void
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__thr_cleanup_push_imp(void (*routine)(void *), void *arg,
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struct _pthread_cleanup_info *info)
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{
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struct pthread *curthread = _get_curthread();
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struct pthread_cleanup *newbuf;
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newbuf = (void *)info;
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newbuf->routine = routine;
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newbuf->routine_arg = arg;
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newbuf->onheap = 0;
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newbuf->prev = curthread->cleanup;
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curthread->cleanup = newbuf;
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}
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void
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__thr_cleanup_pop_imp(int execute)
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{
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struct pthread *curthread = _get_curthread();
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struct pthread_cleanup *old;
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if ((old = curthread->cleanup) != NULL) {
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curthread->cleanup = old->prev;
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if (execute)
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old->routine(old->routine_arg);
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if (old->onheap)
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free(old);
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}
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}
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void
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_thr_cleanup_push(void (*routine)(void *), void *arg)
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{
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struct pthread *curthread = _get_curthread();
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struct pthread_cleanup *newbuf;
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#ifdef _PTHREAD_FORCED_UNWIND
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curthread->unwind_disabled = 1;
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#endif
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if ((newbuf = (struct pthread_cleanup *)
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malloc(sizeof(struct pthread_cleanup))) != NULL) {
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newbuf->routine = routine;
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newbuf->routine_arg = arg;
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newbuf->onheap = 1;
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newbuf->prev = curthread->cleanup;
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curthread->cleanup = newbuf;
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}
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}
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void
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_thr_cleanup_pop(int execute)
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{
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__pthread_cleanup_pop_imp(execute);
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}
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