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A new feature thanks to the fine folks at Switchvox!

Browse Source 
If a deadlock is detected, then the typical lock information will be
printed along with a backtrace of the stack for the offending threads.
Use of this requires compiling with DETECT_DEADLOCKS and having glibc
installed.

Furthermore, issuing the "core show locks" CLI command will print the
normal lock information as well as a backtraces for each lock. This
requires that DEBUG_THREADS is enabled and that glibc is installed.

All the backtrace features may be disabled by running the configure
script with --without-execinfo as an argument



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@118173 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Mark Michelson
2008-05-23 22:35:50 +00:00
parent 1457c99ea8
commit 975a848b67
11 changed files with 737 additions and 308 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
main/logger.c
View File

@@ -1127,30 +1127,67 @@ void ast_log(int level, const char *file, int line, const char *function, const
return;
}
#ifdef HAVE_BKTR
struct ast_bt *ast_bt_create(void)
{
struct ast_bt *bt = ast_calloc(1, sizeof(*bt));
if (!bt) {
ast_log(LOG_ERROR, "Unable to allocate memory for backtrace structure!\n");
return NULL;
}
bt->alloced = 1;
ast_bt_get_addresses(bt);
return bt;
}
int ast_bt_get_addresses(struct ast_bt *bt)
{
bt->num_frames = backtrace(bt->addresses, AST_MAX_BT_FRAMES);
return 0;
}
void *ast_bt_destroy(struct ast_bt *bt)
{
if (bt->alloced) {
ast_free(bt);
}
return NULL;
}
#endif /* HAVE_BKTR */
void ast_backtrace(void)
{
#ifdef HAVE_BKTR
int count = 0, i = 0;
void **addresses;
struct ast_bt *backtrace;
int i = 0;
char **strings;
if ((addresses = ast_calloc(MAX_BACKTRACE_FRAMES, sizeof(*addresses)))) {
count = backtrace(addresses, MAX_BACKTRACE_FRAMES);
if ((strings = backtrace_symbols(addresses, count))) {
ast_debug(1, "Got %d backtrace record%c\n", count, count != 1 ? 's' : ' ');
for (i = 0; i < count; i++) {
#if __WORDSIZE == 32
ast_log(LOG_DEBUG, "#%d: [%08X] %s\n", i, (unsigned int)addresses[i], strings[i]);
#elif __WORDSIZE == 64
ast_log(LOG_DEBUG, "#%d: [%016lX] %s\n", i, (unsigned long)addresses[i], strings[i]);
#endif
}
free(strings);
} else {
ast_debug(1, "Could not allocate memory for backtrace\n");
}
ast_free(addresses);
if (!(backtrace = ast_bt_create())) {
ast_log(LOG_WARNING, "Unable to allocate space for backtrace structure\n");
return;
}
if ((strings = backtrace_symbols(backtrace->addresses, backtrace->num_frames))) {
ast_debug(1, "Got %d backtrace record%c\n", backtrace->num_frames, backtrace->num_frames != 1 ? 's' : ' ');
for (i = 0; i < backtrace->num_frames; i++) {
#if __WORDSIZE == 32
ast_log(LOG_DEBUG, "#%d: [%08X] %s\n", i, (unsigned int)backtrace->addresses[i], strings[i]);
#elif __WORDSIZE == 64
ast_log(LOG_DEBUG, "#%d: [%016lX] %s\n", i, (unsigned long)backtrace->addresses[i], strings[i]);
#endif
}
free(strings);
} else {
ast_debug(1, "Could not allocate memory for backtrace\n");
}
ast_bt_destroy(backtrace);
#else
ast_log(LOG_WARNING, "Must run configure with '--with-execinfo' for stack backtraces.\n");
#endif