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
38 int 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 */
44 void
die(const char * fmt,...)45 die(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 */
64 void
warn(const char * fmt,...)65 warn(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 */
83 void *
safe_malloc(size_t size)84 safe_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 */
99 const char *
dis_demangle(const char * name)100 dis_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