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
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <dlfcn.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <demangle.h>
34
35 #include "dis_util.h"
36
37 int g_error; /* global process exit status, set when warn() is called */
38
39 /*
40 * Fatal error. Print out the error with a leading "dis: ", and then exit the
41 * program.
42 */
43 void
44 die(const char *fmt, ...)
45 {
46 va_list ap;
47
48 (void) fprintf(stderr, "dis: fatal: ");
49
50 va_start(ap, fmt);
51 (void) vfprintf(stderr, fmt, ap);
52 va_end(ap);
53
75
76 g_error = 1;
77 }
78
79 /*
80 * Convenience wrapper around malloc() to cleanly exit if any allocation fails.
81 */
82 void *
83 safe_malloc(size_t size)
84 {
85 void *ret;
86
87 if ((ret = calloc(1, size)) == NULL)
88 die("Out of memory");
89
90 return (ret);
91 }
92
93
94 /*
95 * Generic interface to demangle C++ names. Calls cplus_demangle to do the
96 * necessary translation. If the translation fails, the argument is returned
97 * unchanged. The memory returned is only valid until the next call to
98 * demangle().
99 *
100 * We dlopen() libdemangle.so rather than linking directly against it in case it
101 * is not installed on the system.
102 */
103 const char *
104 dis_demangle(const char *name)
105 {
106 static char *demangled_name;
107 static int (*demangle_func)() = NULL;
108 static int size = BUFSIZE;
109 static int first_flag = 0;
110 int ret;
111
112 /*
113 * If this is the first call, allocate storage
114 * for the buffer.
115 */
116 if (first_flag == 0) {
117 void *demangle_hand;
118
119 demangle_hand = dlopen("libdemangle.so.1", RTLD_LAZY);
120 if (demangle_hand != NULL)
121 demangle_func = (int (*)(int))dlsym(
122 demangle_hand, "cplus_demangle");
123
124 demangled_name = safe_malloc(size);
125 first_flag = 1;
126 }
127
128 /*
129 * If libdemangle is not present, pass through unchanged.
130 */
131 if (demangle_func == NULL)
132 return (name);
133
134 /*
135 * The function returns -1 when the buffer size is not sufficient.
136 */
137 while ((ret = (*demangle_func)(name, demangled_name, size)) == -1) {
138 free(demangled_name);
139 size = size + BUFSIZE;
140 demangled_name = safe_malloc(size);
141 }
142
143 if (ret != 0)
144 return (name);
145
146 return (demangled_name);
147 }
|
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 */
28
29 #include <dlfcn.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <demangle-sys.h>
34
35 #include "dis_util.h"
36
37 int g_error; /* global process exit status, set when warn() is called */
38
39 /*
40 * Fatal error. Print out the error with a leading "dis: ", and then exit the
41 * program.
42 */
43 void
44 die(const char *fmt, ...)
45 {
46 va_list ap;
47
48 (void) fprintf(stderr, "dis: fatal: ");
49
50 va_start(ap, fmt);
51 (void) vfprintf(stderr, fmt, ap);
52 va_end(ap);
53
75
76 g_error = 1;
77 }
78
79 /*
80 * Convenience wrapper around malloc() to cleanly exit if any allocation fails.
81 */
82 void *
83 safe_malloc(size_t size)
84 {
85 void *ret;
86
87 if ((ret = calloc(1, size)) == NULL)
88 die("Out of memory");
89
90 return (ret);
91 }
92
93
94 /*
95 * Since the -C flag explicitly says C++, for now at least, force language to
96 * C++
97 */
98 const char *
99 dis_demangle(const char *name)
100 {
101 static char *demangled_name = NULL;
102
103 /*
104 * Since demangled_name is static, it may be preserved across
105 * invocations. As such, make sure any memory that might be present
106 * from previous invocations is freed.
107 */
108 free(demangled_name);
109 demangled_name = sysdemangle(name, SYSDEM_LANG_CPP, NULL);
110 return ((demangled_name != NULL) ? demangled_name : name);
111 }
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