stdlib/abort-fbsd.c

   1 /*
   2  * Copyright (c) 1985, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #if defined(LIBC_SCCS) && !defined(lint)
  35 static char sccsid[] = "@(#)abort.c     8.1 (Berkeley) 6/4/93";
  36 #endif /* LIBC_SCCS and not lint */
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD: src/lib/libc/stdlib/abort.c,v 1.9 2003/08/16 11:43:57 davidxu Exp $");
  39
  40 #include "namespace.h"
  41 #include <signal.h>
  42 #include <stdarg.h>
  43 #include <stdlib.h>
  44 #include <stddef.h>
  45 #include <unistd.h>
  46 #include <pthread.h>
  47 #include "un-namespace.h"
  48
  49 extern void (*__cleanup)();
  50 extern void __abort(void) __dead2;
  51 extern const char *__crashreporter_info__;
  52
  53 #define TIMEOUT 10000   /* 10 milliseconds */
  54
  55 void
  56 abort()
  57 {
  58         struct sigaction act;
  59
  60         if (!__crashreporter_info__)
  61                 __crashreporter_info__ = "abort() called";
  62         /*
  63          * POSIX requires we flush stdio buffers on abort.
  64          * XXX ISO C requires that abort() be async-signal-safe.
  65          */
  66         if (__cleanup)
  67                 (*__cleanup)();
  68
  69         sigfillset(&act.sa_mask);
  70         /*
  71          * Don't block SIGABRT to give any handler a chance; we ignore
  72          * any errors -- ISO C doesn't allow abort to return anyway.
  73          */
  74         sigdelset(&act.sa_mask, SIGABRT);
  75         (void)_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
  76         (void)raise(SIGABRT);
  77         usleep(TIMEOUT); /* give time for signal to happen */
  78
  79         /*
  80          * If SIGABRT was ignored, or caught and the handler returns, do
  81          * it again, only harder.
  82          */
  83          __abort();
  84 }
  85
  86 __private_extern__ void
  87 __abort()
  88 {
  89         struct sigaction act;
  90
  91         if (!__crashreporter_info__)
  92                 __crashreporter_info__ = "__abort() called";
  93         act.sa_handler = SIG_DFL;
  94         act.sa_flags = 0;
  95         sigfillset(&act.sa_mask);
  96         (void)_sigaction(SIGABRT, &act, NULL);
  97         sigdelset(&act.sa_mask, SIGABRT);
  98         (void)_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
  99         (void)raise(SIGABRT);
 100         usleep(TIMEOUT); /* give time for signal to happen */
 101         __builtin_trap(); /* never exit normally */
 102 }
 103
 104 __private_extern__ void
 105 abort_report_np(const char *fmt, ...)
 106 {
 107         char *str;
 108         va_list ap;
 109
 110         va_start(ap, fmt);
 111         vasprintf(&str, fmt, ap);
 112         va_end(ap);
 113         __crashreporter_info__ = str ? str : fmt;
 114         abort();
 115 }