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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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} |