xref: /illumos-gate/usr/src/lib/libc/port/gen/abort.c (revision 7257d1b4)
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
abort(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