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      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 }
     79