GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/thread/callbacks.c Lines: 0 28 0.0 %
Date: 2017-11-13 Branches: 0 4 0.0 %

Line Branch Exec Source
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/*
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 * Copyright (c) 2014 Philip Guenther <guenther@openbsd.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <pthread.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "thread_private.h"
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#include "rthread_cb.h"
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static __dead void
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_thread_canceled(void)
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{
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	pthread_exit(PTHREAD_CANCELED);
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}
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void
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_thread_set_callbacks(const struct thread_callbacks *cb, size_t len)
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{
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	sigset_t allmask, omask;
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	if (sizeof(*cb) != len) {
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		fprintf(stderr, "library mismatch: libc expected %zu but"
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		    " libpthread gave %zu\n", sizeof(*cb), len);
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		fflush(stderr);
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		_exit(44);
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	}
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	sigfillset(&allmask);
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	if (sigprocmask(SIG_BLOCK, &allmask, &omask) == 0) {
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		/* mprotect RW */
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		memcpy(&_thread_cb, cb, sizeof(_thread_cb));
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		/*
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		 * These are supplied by libc, but only enabled
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		 * here when we actually need to prep for doing MT.
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		 */
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		_thread_cb.tc_canceled		= _thread_canceled;
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		_thread_cb.tc_flockfile		= _thread_flockfile;
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		_thread_cb.tc_ftrylockfile	= _thread_ftrylockfile;
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		_thread_cb.tc_funlockfile	= _thread_funlockfile;
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		_thread_cb.tc_malloc_lock	= _thread_malloc_lock;
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		_thread_cb.tc_malloc_unlock	= _thread_malloc_unlock;
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		_thread_cb.tc_atexit_lock	= _thread_atexit_lock;
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		_thread_cb.tc_atexit_unlock	= _thread_atexit_unlock;
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		_thread_cb.tc_atfork_lock	= _thread_atfork_lock;
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		_thread_cb.tc_atfork_unlock	= _thread_atfork_unlock;
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		_thread_cb.tc_arc4_lock		= _thread_arc4_lock;
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		_thread_cb.tc_arc4_unlock	= _thread_arc4_unlock;
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		_thread_cb.tc_mutex_lock	= _thread_mutex_lock;
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		_thread_cb.tc_mutex_unlock	= _thread_mutex_unlock;
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		_thread_cb.tc_mutex_destroy	= _thread_mutex_destroy;
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		_thread_cb.tc_tag_lock		= _thread_tag_lock;
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		_thread_cb.tc_tag_unlock	= _thread_tag_unlock;
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		_thread_cb.tc_tag_storage	= _thread_tag_storage;
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		/* mprotect RO | LOCKPERM | NOUNMAP */
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		sigprocmask(SIG_SETMASK, &omask, NULL);
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	}
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}