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 2006 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 *
26 * Copyright 2018 Jason King.
27 * Copyright 2018, Joyent, Inc.
28 */
29
30#include <dlfcn.h>
31#include <stdarg.h>
32#include <stdio.h>
33#include <stdlib.h>
34#include <demangle-sys.h>
35
36#include "dis_util.h"
37
38int g_error;	/* global process exit status, set when warn() is called */
39
40/*
41 * Fatal error.  Print out the error with a leading "dis: ", and then exit the
42 * program.
43 */
44void
45die(const char *fmt, ...)
46{
47	va_list ap;
48
49	(void) fprintf(stderr, "dis: fatal: ");
50
51	va_start(ap, fmt);
52	(void) vfprintf(stderr, fmt, ap);
53	va_end(ap);
54
55	(void) fprintf(stderr, "\n");
56
57	exit(1);
58}
59
60/*
61 * Non-fatal error.  Print out the error with a leading "dis: ", set the global
62 * error flag, and return.
63 */
64void
65warn(const char *fmt, ...)
66{
67	va_list ap;
68
69	(void) fprintf(stderr, "dis: warning: ");
70
71	va_start(ap, fmt);
72	(void) vfprintf(stderr, fmt, ap);
73	va_end(ap);
74
75	(void) fprintf(stderr, "\n");
76
77	g_error = 1;
78}
79
80/*
81 * Convenience wrapper around malloc() to cleanly exit if any allocation fails.
82 */
83void *
84safe_malloc(size_t size)
85{
86	void *ret;
87
88	if ((ret = calloc(1, size)) == NULL)
89		die("Out of memory");
90
91	return (ret);
92}
93
94
95/*
96 * Since the -C flag explicitly says C++, for now at least, force language to
97 * C++
98 */
99const char *
100dis_demangle(const char *name)
101{
102	static char *demangled_name = NULL;
103
104	/*
105	 * Since demangled_name is static, it may be preserved across
106	 * invocations.  As such, make sure any memory that might be present
107	 * from previous invocations is freed.
108	 */
109	free(demangled_name);
110	demangled_name = sysdemangle(name, SYSDEM_LANG_AUTO, NULL);
111	return ((demangled_name != NULL) ? demangled_name : name);
112}
113