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Add some more details to the output of "core show locks". When a thread

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is waiting for a lock, this will now show the details about who currently
has it locked.
(inspired by issue #11100)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@87396 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Russell Bryant
2007-10-29 20:22:07 +00:00
parent fd7bc75ce9
commit b2382349dc
2 changed files with 39 additions and 24 deletions
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48
include/asterisk/lock.h
View File

@@ -167,17 +167,17 @@ static void __attribute__((constructor)) init_empty_mutex(void)
memset(&empty_mutex, 0, sizeof(empty_mutex));
}
static inline void reentrancy_lock_cs(ast_mutex_t *p_ast_mutex)
static inline void ast_reentrancy_lock(ast_mutex_t *p_ast_mutex)
{
pthread_mutex_lock(&p_ast_mutex->reentr_mutex);
}
static inline void reentrancy_unlock_cs(ast_mutex_t *p_ast_mutex)
static inline void ast_reentrancy_unlock(ast_mutex_t *p_ast_mutex)
{
pthread_mutex_unlock(&p_ast_mutex->reentr_mutex);
}
static inline void init_reentrancy_cs(ast_mutex_t *p_ast_mutex)
static inline void ast_reentrancy_init(ast_mutex_t *p_ast_mutex)
{
int i;
static pthread_mutexattr_t reentr_attr;
@@ -225,7 +225,7 @@ static inline int __ast_pthread_mutex_init_attr(int track, const char *filename,
}
#endif
init_reentrancy_cs(t);
ast_reentrancy_init(t);
t->track = track;
return pthread_mutex_init(&t->mutex, attr);
@@ -272,10 +272,10 @@ static inline int __ast_pthread_mutex_destroy(const char *filename, int lineno,
case EBUSY:
__ast_mutex_logger("%s line %d (%s): Error: attempt to destroy locked mutex '%s'.\n",
filename, lineno, func, mutex_name);
reentrancy_lock_cs(t);
ast_reentrancy_lock(t);
__ast_mutex_logger("%s line %d (%s): Error: '%s' was locked here.\n",
t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name);
reentrancy_unlock_cs(t);
ast_reentrancy_unlock(t);
break;
}
@@ -286,13 +286,13 @@ static inline int __ast_pthread_mutex_destroy(const char *filename, int lineno,
else
t->mutex = PTHREAD_MUTEX_INIT_VALUE;
#endif
reentrancy_lock_cs(t);
ast_reentrancy_lock(t);
t->file[0] = filename;
t->lineno[0] = lineno;
t->func[0] = func;
t->reentrancy = 0;
t->thread[0] = 0;
reentrancy_unlock_cs(t);
ast_reentrancy_unlock(t);
delete_reentrancy_cs(t);
return res;
@@ -335,11 +335,11 @@ static inline int __ast_pthread_mutex_lock(const char *filename, int lineno, con
if ((current - seconds) && (!((current - seconds) % 5))) {
__ast_mutex_logger("%s line %d (%s): Deadlock? waited %d sec for mutex '%s'?\n",
filename, lineno, func, (int)(current - seconds), mutex_name);
reentrancy_lock_cs(t);
ast_reentrancy_lock(t);
__ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n",
t->file[t->reentrancy-1], t->lineno[t->reentrancy-1],
t->func[t->reentrancy-1], mutex_name);
reentrancy_unlock_cs(t);
ast_reentrancy_unlock(t);
}
usleep(200);
}
@@ -356,7 +356,7 @@ static inline int __ast_pthread_mutex_lock(const char *filename, int lineno, con
#endif /* DETECT_DEADLOCKS */
if (!res) {
reentrancy_lock_cs(t);
ast_reentrancy_lock(t);
if (t->reentrancy < AST_MAX_REENTRANCY) {
t->file[t->reentrancy] = filename;
t->lineno[t->reentrancy] = lineno;
@@ -367,7 +367,7 @@ static inline int __ast_pthread_mutex_lock(const char *filename, int lineno, con
__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
filename, lineno, func, mutex_name);
}
reentrancy_unlock_cs(t);
ast_reentrancy_unlock(t);
if (t->track)
ast_mark_lock_acquired();
} else {
@@ -401,7 +401,7 @@ static inline int __ast_pthread_mutex_trylock(const char *filename, int lineno,
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex);
if (!(res = pthread_mutex_trylock(&t->mutex))) {
reentrancy_lock_cs(t);
ast_reentrancy_lock(t);
if (t->reentrancy < AST_MAX_REENTRANCY) {
t->file[t->reentrancy] = filename;
t->lineno[t->reentrancy] = lineno;
@@ -412,7 +412,7 @@ static inline int __ast_pthread_mutex_trylock(const char *filename, int lineno,
__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
filename, lineno, func, mutex_name);
}
reentrancy_unlock_cs(t);
ast_reentrancy_unlock(t);
if (t->track)
ast_mark_lock_acquired();
} else if (t->track) {
@@ -437,7 +437,7 @@ static inline int __ast_pthread_mutex_unlock(const char *filename, int lineno, c
}
#endif
reentrancy_lock_cs(t);
ast_reentrancy_lock(t);
if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) {
__ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n",
filename, lineno, func, mutex_name);
@@ -458,7 +458,7 @@ static inline int __ast_pthread_mutex_unlock(const char *filename, int lineno, c
t->func[t->reentrancy] = NULL;
t->thread[t->reentrancy] = 0;
}
reentrancy_unlock_cs(t);
ast_reentrancy_unlock(t);
if (t->track)
ast_remove_lock_info(&t->mutex);
@@ -511,7 +511,7 @@ static inline int __ast_cond_wait(const char *filename, int lineno, const char *
}
#endif
reentrancy_lock_cs(t);
ast_reentrancy_lock(t);
if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) {
__ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n",
filename, lineno, func, mutex_name);
@@ -532,7 +532,7 @@ static inline int __ast_cond_wait(const char *filename, int lineno, const char *
t->func[t->reentrancy] = NULL;
t->thread[t->reentrancy] = 0;
}
reentrancy_unlock_cs(t);
ast_reentrancy_unlock(t);
if (t->track)
ast_remove_lock_info(&t->mutex);
@@ -542,7 +542,7 @@ static inline int __ast_cond_wait(const char *filename, int lineno, const char *
filename, lineno, func, strerror(res));
DO_THREAD_CRASH;
} else {
reentrancy_lock_cs(t);
ast_reentrancy_lock(t);
if (t->reentrancy < AST_MAX_REENTRANCY) {
t->file[t->reentrancy] = filename;
t->lineno[t->reentrancy] = lineno;
@@ -553,7 +553,7 @@ static inline int __ast_cond_wait(const char *filename, int lineno, const char *
__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
filename, lineno, func, mutex_name);
}
reentrancy_unlock_cs(t);
ast_reentrancy_unlock(t);
if (t->track)
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex);
@@ -577,7 +577,7 @@ static inline int __ast_cond_timedwait(const char *filename, int lineno, const c
}
#endif
reentrancy_lock_cs(t);
ast_reentrancy_lock(t);
if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) {
__ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n",
filename, lineno, func, mutex_name);
@@ -598,7 +598,7 @@ static inline int __ast_cond_timedwait(const char *filename, int lineno, const c
t->func[t->reentrancy] = NULL;
t->thread[t->reentrancy] = 0;
}
reentrancy_unlock_cs(t);
ast_reentrancy_unlock(t);
if (t->track)
ast_remove_lock_info(&t->mutex);
@@ -608,7 +608,7 @@ static inline int __ast_cond_timedwait(const char *filename, int lineno, const c
filename, lineno, func, strerror(res));
DO_THREAD_CRASH;
} else {
reentrancy_lock_cs(t);
ast_reentrancy_lock(t);
if (t->reentrancy < AST_MAX_REENTRANCY) {
t->file[t->reentrancy] = filename;
t->lineno[t->reentrancy] = lineno;
@@ -619,7 +619,7 @@ static inline int __ast_cond_timedwait(const char *filename, int lineno, const c
__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
filename, lineno, func, mutex_name);
}
reentrancy_unlock_cs(t);
ast_reentrancy_unlock(t);
if (t->track)
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex);

15
main/utils.c
View File

@@ -727,6 +727,9 @@ static int handle_show_locks(int fd, int argc, char *argv[])
lock_info->thread_name);
pthread_mutex_lock(&lock_info->lock);
for (i = 0; str && i < lock_info->num_locks; i++) {
int j;
ast_mutex_t *lock;
ast_dynamic_str_append(&str, 0, "=== ---> %sLock #%d (%s): %s %d %s %s %p (%d)\n",
lock_info->locks[i].pending > 0 ? "Waiting for " :
lock_info->locks[i].pending < 0 ? "Tried and failed to get " : "", i,
@@ -736,6 +739,18 @@ static int handle_show_locks(int fd, int argc, char *argv[])
lock_info->locks[i].func, lock_info->locks[i].lock_name,
lock_info->locks[i].lock_addr,
lock_info->locks[i].times_locked);
if (!lock_info->locks[i].pending)
continue;
lock = lock_info->locks[i].lock_addr;
ast_reentrancy_lock(lock);
for (j = 0; str && j < lock->reentrancy; j++) {
ast_dynamic_str_append(&str, 0, "=== --- ---> Locked Here: %s line %d (%s)\n",
lock->file[j], lock->lineno[j], lock->func[j]);
}
ast_reentrancy_unlock(lock);
}
pthread_mutex_unlock(&lock_info->lock);
if (!str)