usr/src/lib/libc/port/gen/abort.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include "lint.h"
  33 #include "file64.h"
  34 #include <signal.h>
  35 #include <stdlib.h>
  36 #include <unistd.h>
  37 #include <stdio.h>
  38 #include "stdiom.h"
  39
  40 static int pass = 0;    /* counts how many times abort has been called */
  41
  42 /*
  43  * abort() - terminate current process with dump via SIGABRT
  44  */
  45 void
  46 abort(void)
  47 {
  48         sigset_t        set;
  49         struct sigaction        act;
  50
  51         if (!sigaction(SIGABRT, NULL, &act) &&
  52             act.sa_handler != SIG_DFL && act.sa_handler != SIG_IGN) {
  53                 /*
  54                  * User handler is installed, invokes user handler before
  55                  * taking default action.
  56                  *
  57                  * Send SIGABRT, unblock SIGABRT if blocked.
  58                  * If there is pending signal SIGABRT, we only need to unblock
  59                  * SIGABRT.
  60                  */
  61                 if (!sigprocmask(SIG_SETMASK, NULL, &set) &&
  62                     sigismember(&set, SIGABRT)) {
  63                         if (!sigpending(&set) && !sigismember(&set, SIGABRT))
  64                                 (void) raise(SIGABRT);
  65                         (void) sigrelse(SIGABRT);
  66                 } else
  67                         (void) raise(SIGABRT);
  68         }
  69
  70         if (++pass == 1)
  71                 __cleanup();
  72
  73         for (;;) {
  74                 (void) signal(SIGABRT, SIG_DFL);
  75                 (void) sigrelse(SIGABRT);
  76                 (void) raise(SIGABRT);
  77         }
  78 }