1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Kevin P. Fleming <kpfleming@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Debugging support for thread-local-storage objects
*
* \author Kevin P. Fleming <kpfleming@digium.com>
*/
#include "asterisk.h"
#if defined(DEBUG_THREADLOCALS)
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/logger.h"
#include "asterisk/strings.h"
#include "asterisk/utils.h"
#include "asterisk/threadstorage.h"
#include "asterisk/linkedlists.h"
#include "asterisk/cli.h"
struct tls_object {
void *key;
size_t size;
const char *file;
const char *function;
unsigned int line;
pthread_t thread;
AST_LIST_ENTRY(tls_object) entry;
};
static AST_RWLIST_HEAD_STATIC(tls_objects, tls_object);
void __ast_threadstorage_object_add(void *key, size_t len, const char *file, const char *function, unsigned int line)
{
struct tls_object *to;
if (!(to = ast_calloc(1, sizeof(*to))))
return;
to->key = key;
to->size = len;
to->file = file;
to->function = function;
to->line = line;
to->thread = pthread_self();
AST_RWLIST_WRLOCK(&tls_objects);
AST_LIST_INSERT_TAIL(&tls_objects, to, entry);
AST_RWLIST_UNLOCK(&tls_objects);
}
void __ast_threadstorage_object_remove(void *key)
{
struct tls_object *to;
AST_RWLIST_WRLOCK(&tls_objects);
AST_LIST_TRAVERSE_SAFE_BEGIN(&tls_objects, to, entry) {
if (to->key == key) {
AST_LIST_REMOVE_CURRENT(entry);
break;
}
}
AST_LIST_TRAVERSE_SAFE_END;
AST_RWLIST_UNLOCK(&tls_objects);
if (to)
ast_free(to);
}
void __ast_threadstorage_object_replace(void *key_old, void *key_new, size_t len)
{
struct tls_object *to;
AST_RWLIST_WRLOCK(&tls_objects);
AST_LIST_TRAVERSE_SAFE_BEGIN(&tls_objects, to, entry) {
if (to->key == key_old) {
to->key = key_new;
to->size = len;
break;
}
}
AST_LIST_TRAVERSE_SAFE_END;
AST_RWLIST_UNLOCK(&tls_objects);
}
static char *handle_cli_threadstorage_show_allocations(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
char *fn = NULL;
size_t len = 0;
unsigned int count = 0;
struct tls_object *to;
switch (cmd) {
case CLI_INIT:
e->command = "threadstorage show allocations";
e->usage =
"Usage: threadstorage show allocations [<file>]\n"
" Dumps a list of all thread-specific memory allocations,\n"
" optionally limited to those from a specific file\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (a->argc > 4)
return CLI_SHOWUSAGE;
if (a->argc > 3)
fn = a->argv[3];
AST_RWLIST_RDLOCK(&tls_objects);
AST_LIST_TRAVERSE(&tls_objects, to, entry) {
if (fn && strcasecmp(to->file, fn))
continue;
ast_cli(a->fd, "%10d bytes allocated in %20s at line %5d of %25s (thread %p)\n",
(int) to->size, to->function, to->line, to->file, (void *) to->thread);
len += to->size;
count++;
}
AST_RWLIST_UNLOCK(&tls_objects);
ast_cli(a->fd, "%10d bytes allocated in %d allocation%s\n", (int) len, count, count > 1 ? "s" : "");
return CLI_SUCCESS;
}
static char *handle_cli_threadstorage_show_summary(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
char *fn = NULL;
size_t len = 0;
unsigned int count = 0;
struct tls_object *to;
struct file {
const char *name;
size_t len;
unsigned int count;
AST_LIST_ENTRY(file) entry;
} *file;
AST_LIST_HEAD_NOLOCK_STATIC(file_summary, file);
switch (cmd) {
case CLI_INIT:
e->command = "threadstorage show summary";
e->usage =
"Usage: threadstorage show summary [<file>]\n"
" Summarizes thread-specific memory allocations by file, or optionally\n"
" by function, if a file is specified\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (a->argc > 4)
return CLI_SHOWUSAGE;
if (a->argc > 3)
fn = a->argv[3];
AST_RWLIST_RDLOCK(&tls_objects);
AST_LIST_TRAVERSE(&tls_objects, to, entry) {
if (fn && strcasecmp(to->file, fn))
continue;
AST_LIST_TRAVERSE(&file_summary, file, entry) {
if ((!fn && (file->name == to->file)) || (fn && (file->name == to->function)))
break;
}
if (!file) {
file = alloca(sizeof(*file));
memset(file, 0, sizeof(*file));
file->name = fn ? to->function : to->file;
AST_LIST_INSERT_TAIL(&file_summary, file, entry);
}
file->len += to->size;
file->count++;
}
AST_RWLIST_UNLOCK(&tls_objects);
AST_LIST_TRAVERSE(&file_summary, file, entry) {
len += file->len;
count += file->count;
if (fn) {
ast_cli(a->fd, "%10d bytes in %d allocation%ss in function %s\n",
(int) file->len, file->count, file->count > 1 ? "s" : "", file->name);
} else {
ast_cli(a->fd, "%10d bytes in %d allocation%s in file %s\n",
(int) file->len, file->count, file->count > 1 ? "s" : "", file->name);
}
}
ast_cli(a->fd, "%10d bytes allocated in %d allocation%s\n", (int) len, count, count > 1 ? "s" : "");
return CLI_SUCCESS;
}
static struct ast_cli_entry cli[] = {
AST_CLI_DEFINE(handle_cli_threadstorage_show_allocations, "Display outstanding thread local storage allocations"),
AST_CLI_DEFINE(handle_cli_threadstorage_show_summary, "Summarize outstanding memory allocations")
};
void threadstorage_init(void)
{
ast_cli_register_multiple(cli, sizeof(cli) / sizeof(cli[0]));
}
#else /* !defined(DEBUG_THREADLOCALS) */
void threadstorage_init(void)
{
}
#endif /* !defined(DEBUG_THREADLOCALS) */
|
