1 /* $OpenBSD: thread_atexit.c,v 1.2 2019/06/02 01:03:01 guenther Exp $ */ 2 /* 3 * Copyright (c) 2017 Mark Kettenis <kettenis@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <dlfcn.h> 19 #include <stdlib.h> 20 #include <tib.h> 21 22 #include "atexit.h" 23 24 __weak_alias(__cxa_thread_atexit, __cxa_thread_atexit_impl); 25 26 int 27 __cxa_thread_atexit_impl(void (*func)(void *), void *arg, void *dso) 28 { 29 struct thread_atexit_fn *fnp; 30 struct tib *tib = TIB_GET(); 31 32 fnp = calloc(1, sizeof(struct thread_atexit_fn)); 33 if (fnp == NULL) 34 return -1; 35 36 dlctl(NULL, DL_REFERENCE, dso); 37 38 fnp->func = func; 39 fnp->arg = arg; 40 fnp->next = tib->tib_atexit; 41 tib->tib_atexit = fnp; 42 43 return 0; 44 } 45