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asterisk
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A new feature thanks to the fine folks at Switchvox!

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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
1.6.1
Mark Michelson 17 years ago
parent 1457c99ea8
commit 975a848b67
11 changed files with 617 additions and 188 deletions
Show Stats Download Patch File Download Diff File

6
CHANGES
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@ -744,3 +744,9 @@ Miscellaneous
turned on, via the CHANNEL(trace) dialplan function. Could be useful for
dialplan debugging.
* iLBC source code no longer included (see UPGRADE.txt for details)
* If compiled with DETECT_DEADLOCKS enabled and if you have glibc, then if
deadlock is detected, a backtrace of the stack which led to the lock calls
will be output to the CLI.
* If compiled with DEBUG_THREADS enabled and if you have glibc, then issuing
the "core show locks" CLI command will give lock information output as well
as a backtrace of the stack which led to the lock calls.

532
include/asterisk/lock.h
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@ -51,6 +51,8 @@
#include <pthread.h>
#include <sys/param.h>
#include <execinfo.h>
#include "asterisk/logger.h"
/* internal macro to profile mutexes. Only computes the delay on
@ -108,9 +110,15 @@
#include <errno.h>
#ifdef HAVE_BKTR
#define AST_MUTEX_INIT_VALUE { PTHREAD_MUTEX_INIT_VALUE, 1, { NULL }, { 0 }, 0, { NULL }, { 0 }, {{{ 0 }}}, PTHREAD_MUTEX_INIT_VALUE }
#define AST_MUTEX_INIT_VALUE_NOTRACKING \
{ PTHREAD_MUTEX_INIT_VALUE, 0, { NULL }, { 0 }, 0, { NULL }, { 0 }, {{{ 0 }}}, PTHREAD_MUTEX_INIT_VALUE }
#else
#define AST_MUTEX_INIT_VALUE { PTHREAD_MUTEX_INIT_VALUE, 1, { NULL }, { 0 }, 0, { NULL }, { 0 }, PTHREAD_MUTEX_INIT_VALUE }
#define AST_MUTEX_INIT_VALUE_NOTRACKING \
{ PTHREAD_MUTEX_INIT_VALUE, 0, { NULL }, { 0 }, 0, { NULL }, { 0 }, PTHREAD_MUTEX_INIT_VALUE }
#endif
#define AST_MAX_REENTRANCY 10
@ -125,6 +133,9 @@ struct ast_mutex_info {
int reentrancy;
const char *func[AST_MAX_REENTRANCY];
pthread_t thread[AST_MAX_REENTRANCY];
#ifdef HAVE_BKTR
struct ast_bt backtrace[AST_MAX_REENTRANCY];
#endif
pthread_mutex_t reentr_mutex;
};
@ -149,12 +160,22 @@ enum ast_lock_type {
* on the lock. ast_mark_lock_acquired() will mark it as held by this thread.
*/
#if !defined(LOW_MEMORY)
#ifdef HAVE_BKTR
void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr, struct ast_bt *bt);
#else
void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr);
#endif /* HAVE_BKTR */
#else
#define ast_store_lock_info(I,DONT,CARE,ABOUT,THE,PARAMETERS)
#endif
#ifdef HAVE_BKTR
#define ast_store_lock_info(I,DONT,CARE,ABOUT,THE,PARAMETERS,BUD)
#else
#define ast_store_lock_info(I,DONT,CARE,ABOUT,THE,PARAMETERS)
#endif /* HAVE_BKTR */
#endif /* !defined(LOW_MEMORY) */
/*!
* \brief Mark the last lock as acquired
@ -181,12 +202,34 @@ void ast_mark_lock_failed(void *lock_addr);
* be removed from the current thread's lock info struct.
*/
#if !defined(LOW_MEMORY)
#ifdef HAVE_BKTR
void ast_remove_lock_info(void *lock_addr, struct ast_bt *bt);
#else
void ast_remove_lock_info(void *lock_addr);
#endif /* HAVE_BKTR */
#else
#ifdef HAVE_BKTR
#define ast_remove_lock_info(ignore,me)
#else
#define ast_remove_lock_info(ignore)
#endif
#endif /* HAVE_BKTR */
#endif /* !defined(LOW_MEMORY) */
#ifdef HAVE_BKTR
static inline void __dump_backtrace(struct ast_bt *bt, int canlog)
{
char **strings;
size_t i;
strings = backtrace_symbols(bt->addresses, bt->num_frames);
for (i = 0; i < bt->num_frames; i++)
__ast_mutex_logger("%s\n", strings[i]);
free(strings);
}
#endif
/*!
* \brief log info for the current lock with ast_log().
@ -223,6 +266,9 @@ static inline void ast_reentrancy_init(ast_mutex_t *p_ast_mutex)
p_ast_mutex->lineno[i] = 0;
p_ast_mutex->func[i] = NULL;
p_ast_mutex->thread[i] = 0;
#ifdef HAVE_BKTR
memset(&p_ast_mutex->backtrace[i], 0, sizeof(p_ast_mutex->backtrace[i]));
#endif
}
p_ast_mutex->reentrancy = 0;
@ -308,6 +354,9 @@ static inline int __ast_pthread_mutex_destroy(const char *filename, int lineno,
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);
#ifdef HAVE_BKTR
__dump_backtrace(&t->backtrace[t->reentrancy-1], canlog);
#endif
ast_reentrancy_unlock(t);
break;
}
@ -325,6 +374,9 @@ static inline int __ast_pthread_mutex_destroy(const char *filename, int lineno,
t->func[0] = func;
t->reentrancy = 0;
t->thread[0] = 0;
#ifdef HAVE_BKTR
memset(&t->backtrace[0], 0, sizeof(t->backtrace[0]));
#endif
ast_reentrancy_unlock(t);
delete_reentrancy_cs(t);
@ -336,6 +388,9 @@ static inline int __ast_pthread_mutex_lock(const char *filename, int lineno, con
{
int res;
int canlog = strcmp(filename, "logger.c") & t->track;
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS)
if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
@ -352,8 +407,17 @@ static inline int __ast_pthread_mutex_lock(const char *filename, int lineno, con
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
if (t->track)
if (t->track) {
#ifdef HAVE_BKTR
ast_reentrancy_lock(t);
ast_bt_get_addresses(&t->backtrace[t->reentrancy]);
bt = &t->backtrace[t->reentrancy];
ast_reentrancy_unlock(t);
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex, bt);
#else
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex);
#endif
}
#ifdef DETECT_DEADLOCKS
{
@ -373,9 +437,15 @@ static inline int __ast_pthread_mutex_lock(const char *filename, int lineno, con
__ast_mutex_logger("%s line %d (%s): Deadlock? waited %d sec for mutex '%s'?\n",
filename, lineno, func, (int) wait_time, mutex_name);
ast_reentrancy_lock(t);
#ifdef HAVE_BKTR
__dump_backtrace(&t->backtrace[t->reentrancy], canlog);
#endif
__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);
#ifdef HAVE_BKTR
__dump_backtrace(&t->backtrace[t->reentrancy-1], canlog);
#endif
ast_reentrancy_unlock(t);
reported_wait = wait_time;
}
@ -409,8 +479,20 @@ static inline int __ast_pthread_mutex_lock(const char *filename, int lineno, con
if (t->track)
ast_mark_lock_acquired(&t->mutex);
} else {
#ifdef HAVE_BKTR
if (t->reentrancy) {
ast_reentrancy_lock(t);
bt = &t->backtrace[t->reentrancy-1];
ast_reentrancy_unlock(t);
} else {
bt = NULL;
}
if (t->track)
ast_remove_lock_info(&t->mutex, bt);
#else
if (t->track)
ast_remove_lock_info(&t->mutex);
#endif
__ast_mutex_logger("%s line %d (%s): Error obtaining mutex: %s\n",
filename, lineno, func, strerror(res));
DO_THREAD_CRASH;
@ -424,6 +506,9 @@ static inline int __ast_pthread_mutex_trylock(const char *filename, int lineno,
{
int res;
int canlog = strcmp(filename, "logger.c") & t->track;
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS)
if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
@ -440,8 +525,17 @@ static inline int __ast_pthread_mutex_trylock(const char *filename, int lineno,
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
if (t->track)
if (t->track) {
#ifdef HAVE_BKTR
ast_reentrancy_lock(t);
ast_bt_get_addresses(&t->backtrace[t->reentrancy]);
bt = &t->backtrace[t->reentrancy];
ast_reentrancy_unlock(t);
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex, bt);
#else
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex);
#endif
}
if (!(res = pthread_mutex_trylock(&t->mutex))) {
ast_reentrancy_lock(t);
@ -470,6 +564,9 @@ static inline int __ast_pthread_mutex_unlock(const char *filename, int lineno, c
{
int res;
int canlog = strcmp(filename, "logger.c") & t->track;
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS
if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
@ -490,6 +587,9 @@ static inline int __ast_pthread_mutex_unlock(const char *filename, int lineno, c
filename, lineno, func, mutex_name);
__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);
#ifdef HAVE_BKTR
__dump_backtrace(&t->backtrace[t->reentrancy-1], canlog);
#endif
DO_THREAD_CRASH;
}
@ -505,11 +605,21 @@ static inline int __ast_pthread_mutex_unlock(const char *filename, int lineno, c
t->func[t->reentrancy] = NULL;
t->thread[t->reentrancy] = 0;
}
#ifdef HAVE_BKTR
if (t->reentrancy) {
bt = &t->backtrace[t->reentrancy - 1];
}
#endif
ast_reentrancy_unlock(t);
if (t->track)
if (t->track) {
#ifdef HAVE_BKTR
ast_remove_lock_info(&t->mutex, bt);
#else
ast_remove_lock_info(&t->mutex);
#endif
}
if ((res = pthread_mutex_unlock(&t->mutex))) {
__ast_mutex_logger("%s line %d (%s): Error releasing mutex: %s\n",
filename, lineno, func, strerror(res));
@ -549,6 +659,9 @@ static inline int __ast_cond_wait(const char *filename, int lineno, const char *
{
int res;
int canlog = strcmp(filename, "logger.c") & t->track;
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS
if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
@ -569,6 +682,9 @@ static inline int __ast_cond_wait(const char *filename, int lineno, const char *
filename, lineno, func, mutex_name);
__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);
#ifdef HAVE_BKTR
__dump_backtrace(&t->backtrace[t->reentrancy-1], canlog);
#endif
DO_THREAD_CRASH;
}
@ -584,10 +700,21 @@ static inline int __ast_cond_wait(const char *filename, int lineno, const char *
t->func[t->reentrancy] = NULL;
t->thread[t->reentrancy] = 0;
}
#ifdef HAVE_BKTR
if (t->reentrancy) {
bt = &t->backtrace[t->reentrancy - 1];
}
#endif
ast_reentrancy_unlock(t);
if (t->track)
if (t->track) {
#ifdef HAVE_BKTR
ast_remove_lock_info(&t->mutex, bt);
#else
ast_remove_lock_info(&t->mutex);
#endif
}
if ((res = pthread_cond_wait(cond, &t->mutex))) {
__ast_mutex_logger("%s line %d (%s): Error waiting on condition mutex '%s'\n",
@ -600,6 +727,10 @@ static inline int __ast_cond_wait(const char *filename, int lineno, const char *
t->lineno[t->reentrancy] = lineno;
t->func[t->reentrancy] = func;
t->thread[t->reentrancy] = pthread_self();
#ifdef HAVE_BKTR
ast_bt_get_addresses(&t->backtrace[t->reentrancy]);
bt = &t->backtrace[t->reentrancy];
#endif
t->reentrancy++;
} else {
__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
@ -607,8 +738,13 @@ static inline int __ast_cond_wait(const char *filename, int lineno, const char *
}
ast_reentrancy_unlock(t);
if (t->track)
if (t->track) {
#ifdef HAVE_BKTR
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex, bt);
#else
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex);
#endif
}
}
return res;
@ -620,6 +756,9 @@ static inline int __ast_cond_timedwait(const char *filename, int lineno, const c
{
int res;
int canlog = strcmp(filename, "logger.c") & t->track;
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS
if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
@ -640,6 +779,9 @@ static inline int __ast_cond_timedwait(const char *filename, int lineno, const c
filename, lineno, func, mutex_name);
__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);
#ifdef HAVE_BKTR
__dump_backtrace(&t->backtrace[t->reentrancy-1], canlog);
#endif
DO_THREAD_CRASH;
}
@ -655,10 +797,19 @@ static inline int __ast_cond_timedwait(const char *filename, int lineno, const c
t->func[t->reentrancy] = NULL;
t->thread[t->reentrancy] = 0;
}
#ifdef HAVE_BKTR
if (t->reentrancy) {
bt = &t->backtrace[t->reentrancy - 1];
}
#endif
ast_reentrancy_unlock(t);
if (t->track)
#ifdef HAVE_BKTR
ast_remove_lock_info(&t->mutex, bt);
#else
ast_remove_lock_info(&t->mutex);
#endif
if ((res = pthread_cond_timedwait(cond, &t->mutex, abstime)) && (res != ETIMEDOUT)) {
__ast_mutex_logger("%s line %d (%s): Error waiting on condition mutex '%s'\n",
@ -671,6 +822,10 @@ static inline int __ast_cond_timedwait(const char *filename, int lineno, const c
t->lineno[t->reentrancy] = lineno;
t->func[t->reentrancy] = func;
t->thread[t->reentrancy] = pthread_self();
#ifdef HAVE_BKTR
ast_bt_get_addresses(&t->backtrace[t->reentrancy]);
bt = &t->backtrace[t->reentrancy];
#endif
t->reentrancy++;
} else {
__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
@ -678,8 +833,13 @@ static inline int __ast_cond_timedwait(const char *filename, int lineno, const c
}
ast_reentrancy_unlock(t);
if (t->track)
if (t->track) {
#ifdef HAVE_BKTR
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex, bt);
#else
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex);
#endif
}
}
return res;
@ -696,151 +856,14 @@ static inline int __ast_cond_timedwait(const char *filename, int lineno, const c
#define ast_cond_wait(cond, mutex) __ast_cond_wait(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, #mutex, cond, mutex)
#define ast_cond_timedwait(cond, mutex, time) __ast_cond_timedwait(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, #mutex, cond, mutex, time)
#else /* !DEBUG_THREADS */
typedef pthread_mutex_t ast_mutex_t;
#define AST_MUTEX_INIT_VALUE ((ast_mutex_t) PTHREAD_MUTEX_INIT_VALUE)
#define AST_MUTEX_INIT_VALUE_NOTRACKING ((ast_mutex_t) PTHREAD_MUTEX_INIT_VALUE)
#define ast_mutex_init_notracking(m) ast_mutex_init(m)
static inline int ast_mutex_init(ast_mutex_t *pmutex)
{
int res;
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, AST_MUTEX_KIND);
res = pthread_mutex_init(pmutex, &attr);
pthread_mutexattr_destroy(&attr);
return res;
}
#define ast_pthread_mutex_init(pmutex,a) pthread_mutex_init(pmutex,a)
static inline int ast_mutex_unlock(ast_mutex_t *pmutex)
{
return pthread_mutex_unlock(pmutex);
}
static inline int ast_mutex_destroy(ast_mutex_t *pmutex)
{
return pthread_mutex_destroy(pmutex);
}
static inline int ast_mutex_lock(ast_mutex_t *pmutex)
{
__MTX_PROF(pmutex);
}
static inline int ast_mutex_trylock(ast_mutex_t *pmutex)
{
return pthread_mutex_trylock(pmutex);
}
typedef pthread_cond_t ast_cond_t;
static inline int ast_cond_init(ast_cond_t *cond, pthread_condattr_t *cond_attr)
{
return pthread_cond_init(cond, cond_attr);
}
static inline int ast_cond_signal(ast_cond_t *cond)
{
return pthread_cond_signal(cond);
}
static inline int ast_cond_broadcast(ast_cond_t *cond)
{
return pthread_cond_broadcast(cond);
}
static inline int ast_cond_destroy(ast_cond_t *cond)
{
return pthread_cond_destroy(cond);
}
static inline int ast_cond_wait(ast_cond_t *cond, ast_mutex_t *t)
{
return pthread_cond_wait(cond, t);
}
static inline int ast_cond_timedwait(ast_cond_t *cond, ast_mutex_t *t, const struct timespec *abstime)
{
return pthread_cond_timedwait(cond, t, abstime);
}
#endif /* !DEBUG_THREADS */
#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS)
/*
* If AST_MUTEX_INIT_W_CONSTRUCTORS is defined, use file scope constructors
* and destructors to create/destroy global mutexes.
*/
#define __AST_MUTEX_DEFINE(scope, mutex, init_val, track) \
scope ast_mutex_t mutex = init_val; \
static void __attribute__ ((constructor)) init_##mutex(void) \
{ \
if (track) \
ast_mutex_init(&mutex); \
else \
ast_mutex_init_notracking(&mutex); \
} \
\
static void __attribute__ ((destructor)) fini_##mutex(void) \
{ \
ast_mutex_destroy(&mutex); \
}
#else /* !AST_MUTEX_INIT_W_CONSTRUCTORS */
/* By default, use static initialization of mutexes. */
#define __AST_MUTEX_DEFINE(scope, mutex, init_val, track) scope ast_mutex_t mutex = init_val
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
#ifndef __CYGWIN__ /* temporary disabled for cygwin */
#define pthread_mutex_t use_ast_mutex_t_instead_of_pthread_mutex_t
#define pthread_cond_t use_ast_cond_t_instead_of_pthread_cond_t
#endif
#define pthread_mutex_lock use_ast_mutex_lock_instead_of_pthread_mutex_lock
#define pthread_mutex_unlock use_ast_mutex_unlock_instead_of_pthread_mutex_unlock
#define pthread_mutex_trylock use_ast_mutex_trylock_instead_of_pthread_mutex_trylock
#define pthread_mutex_init use_ast_mutex_init_instead_of_pthread_mutex_init
#define pthread_mutex_destroy use_ast_mutex_destroy_instead_of_pthread_mutex_destroy
#define pthread_cond_init use_ast_cond_init_instead_of_pthread_cond_init
#define pthread_cond_destroy use_ast_cond_destroy_instead_of_pthread_cond_destroy
#define pthread_cond_signal use_ast_cond_signal_instead_of_pthread_cond_signal
#define pthread_cond_broadcast use_ast_cond_broadcast_instead_of_pthread_cond_broadcast
#define pthread_cond_wait use_ast_cond_wait_instead_of_pthread_cond_wait
#define pthread_cond_timedwait use_ast_cond_timedwait_instead_of_pthread_cond_timedwait
#define AST_MUTEX_DEFINE_STATIC(mutex) __AST_MUTEX_DEFINE(static, mutex, AST_MUTEX_INIT_VALUE, 1)
#define AST_MUTEX_DEFINE_STATIC_NOTRACKING(mutex) __AST_MUTEX_DEFINE(static, mutex, AST_MUTEX_INIT_VALUE_NOTRACKING, 0)
#define AST_MUTEX_INITIALIZER __use_AST_MUTEX_DEFINE_STATIC_rather_than_AST_MUTEX_INITIALIZER__
#define gethostbyname __gethostbyname__is__not__reentrant__use__ast_gethostbyname__instead__
#ifndef __linux__
#define pthread_create __use_ast_pthread_create_instead__
#endif
/*
* Same as above, definitions of ast_rwlock_t for the various cases:
* simple wrappers for the pthread equivalent in the non-debug case,
* more sophisticated tracking in the debug case.
*/
typedef pthread_rwlock_t ast_rwlock_t;
#ifdef HAVE_PTHREAD_RWLOCK_INITIALIZER
#define AST_RWLOCK_INIT_VALUE PTHREAD_RWLOCK_INITIALIZER
#else
#define AST_RWLOCK_INIT_VALUE { 0 }
struct ast_rwlock_info {
pthread_rwlock_t lock;
#ifdef HAVE_BKTR
struct ast_bt backtrace;
#endif
};
#ifdef DEBUG_THREADS
typedef struct ast_rwlock_info ast_rwlock_t;
#define ast_rwlock_init(rwlock) __ast_rwlock_init(__FILE__, __LINE__, __PRETTY_FUNCTION__, #rwlock, rwlock)
#define ast_rwlock_destroy(rwlock) __ast_rwlock_destroy(__FILE__, __LINE__, __PRETTY_FUNCTION__, #rwlock, rwlock)
@ -850,6 +873,19 @@ typedef pthread_rwlock_t ast_rwlock_t;
#define ast_rwlock_tryrdlock(a) _ast_rwlock_tryrdlock(a, # a, __FILE__, __LINE__, __PRETTY_FUNCTION__)
#define ast_rwlock_trywrlock(a) _ast_rwlock_trywrlock(a, # a, __FILE__, __LINE__, __PRETTY_FUNCTION__)
#ifdef HAVE_PTHREAD_RWLOCK_INITIALIZER
#ifdef HAVE_BKTR
#define AST_RWLOCK_INIT_VALUE { PTHREAD_RWLOCK_INITIALIZER, {{0,},} }
#else
#define AST_RWLOCK_INIT_VALUE { PTHREAD_RWLOCK_INITIALIZER }
#endif /* HAVE_BKTR */
#else /* HAVE_PTHREAD_RWLOCK_INITIALIZER */
#ifdef HAVE_BKTR
#define AST_RWLOCK_INIT_VALUE { 0 , {0,},}}
#else
#define AST_RWLOCK_INIT_VALUE { 0 }
#endif /* HAVE_BKTR */
#endif /* HAVE_PTHREAD_RWLOCK_INITIALIZER */
static inline int __ast_rwlock_init(const char *filename, int lineno, const char *func, const char *rwlock_name, ast_rwlock_t *prwlock)
{
@ -870,7 +906,7 @@ static inline int __ast_rwlock_init(const char *filename, int lineno, const char
pthread_rwlockattr_setkind_np(&attr, PTHREAD_RWLOCK_PREFER_WRITER_NP);
#endif
res = pthread_rwlock_init(prwlock, &attr);
res = pthread_rwlock_init(&prwlock->lock, &attr);
pthread_rwlockattr_destroy(&attr);
return res;
}
@ -889,7 +925,7 @@ static inline int __ast_rwlock_destroy(const char *filename, int lineno, const c
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
if ((res = pthread_rwlock_destroy(prwlock)))
if ((res = pthread_rwlock_destroy(&prwlock->lock)))
__ast_mutex_logger("%s line %d (%s): Error destroying rwlock %s: %s\n",
filename, lineno, func, rwlock_name, strerror(res));
@ -916,8 +952,13 @@ static inline int _ast_rwlock_unlock(ast_rwlock_t *lock, const char *name,
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
res = pthread_rwlock_unlock(lock);
res = pthread_rwlock_unlock(&lock->lock);
#ifdef HAVE_BKTR
memset(&lock->backtrace, 0, sizeof(lock->backtrace));
ast_remove_lock_info(lock, NULL);
#else
ast_remove_lock_info(lock);
#endif
return res;
}
@ -942,13 +983,20 @@ static inline int _ast_rwlock_rdlock(ast_rwlock_t *lock, const char *name,
}
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
#ifdef HAVE_BKTR
ast_store_lock_info(AST_RDLOCK, file, line, func, name, lock, &lock->backtrace);
#else
ast_store_lock_info(AST_RDLOCK, file, line, func, name, lock);
res = pthread_rwlock_rdlock(lock);
#endif
res = pthread_rwlock_rdlock(&lock->lock);
if (!res)
ast_mark_lock_acquired(lock);
else
#ifdef HAVE_BKTR
ast_remove_lock_info(lock, NULL);
#else
ast_remove_lock_info(lock);
#endif
return res;
}
@ -973,13 +1021,20 @@ static inline int _ast_rwlock_wrlock(ast_rwlock_t *lock, const char *name,
}
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
#ifdef HAVE_BKTR
ast_store_lock_info(AST_WRLOCK, file, line, func, name, lock, &lock->backtrace);
#else
ast_store_lock_info(AST_WRLOCK, file, line, func, name, lock);
res = pthread_rwlock_wrlock(lock);
#endif
res = pthread_rwlock_wrlock(&lock->lock);
if (!res)
ast_mark_lock_acquired(lock);
else
#ifdef HAVE_BKTR
ast_remove_lock_info(lock, NULL);
#else
ast_remove_lock_info(lock);
#endif
return res;
}
@ -1004,13 +1059,20 @@ static inline int _ast_rwlock_tryrdlock(ast_rwlock_t *lock, const char *name,
}
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
#ifdef HAVE_BKTR
ast_store_lock_info(AST_RDLOCK, file, line, func, name, lock, &lock->backtrace);
#else
ast_store_lock_info(AST_RDLOCK, file, line, func, name, lock);
res = pthread_rwlock_tryrdlock(lock);
#endif
res = pthread_rwlock_tryrdlock(&lock->lock);
if (!res)
ast_mark_lock_acquired(lock);
else
#ifdef HAVE_BKTR
ast_remove_lock_info(lock, NULL);
#else
ast_remove_lock_info(lock);
#endif
return res;
}
@ -1035,18 +1097,108 @@ static inline int _ast_rwlock_trywrlock(ast_rwlock_t *lock, const char *name,
}
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
#ifdef HAVE_BKTR
ast_store_lock_info(AST_WRLOCK, file, line, func, name, lock, &lock->backtrace);
#else
ast_store_lock_info(AST_WRLOCK, file, line, func, name, lock);
res = pthread_rwlock_trywrlock(lock);
#endif
res = pthread_rwlock_trywrlock(&lock->lock);
if (!res)
ast_mark_lock_acquired(lock);
else
#ifdef HAVE_BKTR
ast_remove_lock_info(lock, NULL);
#else
ast_remove_lock_info(lock);
#endif
return res;
}
#else /* !DEBUG_THREADS */
typedef pthread_mutex_t ast_mutex_t;
#define AST_MUTEX_INIT_VALUE ((ast_mutex_t) PTHREAD_MUTEX_INIT_VALUE)
#define AST_MUTEX_INIT_VALUE_NOTRACKING ((ast_mutex_t) PTHREAD_MUTEX_INIT_VALUE)
#define ast_mutex_init_notracking(m) ast_mutex_init(m)
static inline int ast_mutex_init(ast_mutex_t *pmutex)
{
int res;
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, AST_MUTEX_KIND);
res = pthread_mutex_init(pmutex, &attr);
pthread_mutexattr_destroy(&attr);
return res;
}
#define ast_pthread_mutex_init(pmutex,a) pthread_mutex_init(pmutex,a)
static inline int ast_mutex_unlock(ast_mutex_t *pmutex)
{
return pthread_mutex_unlock(pmutex);
}
static inline int ast_mutex_destroy(ast_mutex_t *pmutex)
{
return pthread_mutex_destroy(pmutex);
}
static inline int ast_mutex_lock(ast_mutex_t *pmutex)
{
__MTX_PROF(pmutex);
}
static inline int ast_mutex_trylock(ast_mutex_t *pmutex)
{
return pthread_mutex_trylock(pmutex);
}
typedef pthread_cond_t ast_cond_t;
static inline int ast_cond_init(ast_cond_t *cond, pthread_condattr_t *cond_attr)
{
return pthread_cond_init(cond, cond_attr);
}
static inline int ast_cond_signal(ast_cond_t *cond)
{
return pthread_cond_signal(cond);
}
static inline int ast_cond_broadcast(ast_cond_t *cond)
{
return pthread_cond_broadcast(cond);
}
static inline int ast_cond_destroy(ast_cond_t *cond)
{
return pthread_cond_destroy(cond);
}
static inline int ast_cond_wait(ast_cond_t *cond, ast_mutex_t *t)
{
return pthread_cond_wait(cond, t);
}
static inline int ast_cond_timedwait(ast_cond_t *cond, ast_mutex_t *t, const struct timespec *abstime)
{
return pthread_cond_timedwait(cond, t, abstime);
}
typedef pthread_rwlock_t ast_rwlock_t;
#ifdef HAVE_PTHREAD_RWLOCK_INITIALIZER
#define AST_RWLOCK_INIT_VALUE PTHREAD_RWLOCK_INITIALIZER
#else
#define AST_RWLOCK_INIT_VALUE { 0 }
#endif
static inline int ast_rwlock_init(ast_rwlock_t *prwlock)
{
int res;
@ -1092,8 +1244,60 @@ static inline int ast_rwlock_trywrlock(ast_rwlock_t *prwlock)
{
return pthread_rwlock_trywrlock(prwlock);
}
#endif /* !DEBUG_THREADS */
#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS)
/*
* If AST_MUTEX_INIT_W_CONSTRUCTORS is defined, use file scope constructors
* and destructors to create/destroy global mutexes.
*/
#define __AST_MUTEX_DEFINE(scope, mutex, init_val, track) \
scope ast_mutex_t mutex = init_val; \
static void __attribute__ ((constructor)) init_##mutex(void) \
{ \
if (track) \
ast_mutex_init(&mutex); \
else \
ast_mutex_init_notracking(&mutex); \
} \
\
static void __attribute__ ((destructor)) fini_##mutex(void) \
{ \
ast_mutex_destroy(&mutex); \
}
#else /* !AST_MUTEX_INIT_W_CONSTRUCTORS */
/* By default, use static initialization of mutexes. */
#define __AST_MUTEX_DEFINE(scope, mutex, init_val, track) scope ast_mutex_t mutex = init_val
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
#ifndef __CYGWIN__ /* temporary disabled for cygwin */
#define pthread_mutex_t use_ast_mutex_t_instead_of_pthread_mutex_t
#define pthread_cond_t use_ast_cond_t_instead_of_pthread_cond_t
#endif
#define pthread_mutex_lock use_ast_mutex_lock_instead_of_pthread_mutex_lock
#define pthread_mutex_unlock use_ast_mutex_unlock_instead_of_pthread_mutex_unlock
#define pthread_mutex_trylock use_ast_mutex_trylock_instead_of_pthread_mutex_trylock
#define pthread_mutex_init use_ast_mutex_init_instead_of_pthread_mutex_init
#define pthread_mutex_destroy use_ast_mutex_destroy_instead_of_pthread_mutex_destroy
#define pthread_cond_init use_ast_cond_init_instead_of_pthread_cond_init
#define pthread_cond_destroy use_ast_cond_destroy_instead_of_pthread_cond_destroy
#define pthread_cond_signal use_ast_cond_signal_instead_of_pthread_cond_signal
#define pthread_cond_broadcast use_ast_cond_broadcast_instead_of_pthread_cond_broadcast
#define pthread_cond_wait use_ast_cond_wait_instead_of_pthread_cond_wait
#define pthread_cond_timedwait use_ast_cond_timedwait_instead_of_pthread_cond_timedwait
#define AST_MUTEX_DEFINE_STATIC(mutex) __AST_MUTEX_DEFINE(static, mutex, AST_MUTEX_INIT_VALUE, 1)
#define AST_MUTEX_DEFINE_STATIC_NOTRACKING(mutex) __AST_MUTEX_DEFINE(static, mutex, AST_MUTEX_INIT_VALUE_NOTRACKING, 0)
#define AST_MUTEX_INITIALIZER __use_AST_MUTEX_DEFINE_STATIC_rather_than_AST_MUTEX_INITIALIZER__
#define gethostbyname __gethostbyname__is__not__reentrant__use__ast_gethostbyname__instead__
#ifndef __linux__
#define pthread_create __use_ast_pthread_create_instead__
#endif
/* Statically declared read/write locks */
#ifndef HAVE_PTHREAD_RWLOCK_INITIALIZER

44
include/asterisk/logger.h
Unescape View File

@ -219,6 +219,50 @@ unsigned int ast_verbose_get_by_file(const char *file);
} \
} while (0)
#ifndef _LOGGER_BACKTRACE_H
#define _LOGGER_BACKTRACE_H
#ifdef HAVE_BKTR
#define AST_MAX_BT_FRAMES 32
/* \brief
*
* A structure to hold backtrace information. This structure provides an easy means to
* store backtrace information or pass backtraces to other functions.
*/
struct ast_bt {
/*! The addresses of the stack frames. This is filled in by calling the glibc backtrace() function */
void *addresses[AST_MAX_BT_FRAMES];
/*! The number of stack frames in the backtrace */
int num_frames;
/*! Tells if the ast_bt structure was dynamically allocated */
unsigned int alloced:1;
};
/* \brief
* Allocates memory for an ast_bt and stores addresses and symbols.
*
* \return Returns NULL on failure, or the allocated ast_bt on success
*/
struct ast_bt *ast_bt_create(void);
/* \brief
* Fill an allocated ast_bt with addresses
*
* \retval 0 Success
* \retval -1 Failure
*/
int ast_bt_get_addresses(struct ast_bt *bt);
/* \brief
*
* Free dynamically allocated portions of an ast_bt
*
* \retval NULL.
*/
void *ast_bt_destroy(struct ast_bt *bt);
#endif /* HAVE_BKTR */
#endif /* _LOGGER_BACKTRACE_H */
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

65
main/logger.c
Unescape 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 (!(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)addresses[i], strings[i]);
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)addresses[i], strings[i]);
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_free(addresses);
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

50
main/utils.c
Unescape View File

@ -540,6 +540,9 @@ struct thr_lock_info {
enum ast_lock_type type;
/*! This thread is waiting on this lock */
int pending:2;
#ifdef HAVE_BKTR
struct ast_bt *backtrace;
#endif
} locks[AST_MAX_LOCKS];
/*! This is the number of locks currently held by this thread.
* The index (num_locks - 1) has the info on the last one in the
@ -583,9 +586,13 @@ static void lock_info_destroy(void *data)
* \brief The thread storage key for per-thread lock info
*/
AST_THREADSTORAGE_CUSTOM(thread_lock_info, NULL, lock_info_destroy);
#ifdef HAVE_BKTR
void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr, struct ast_bt *bt)
#else
void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr)
#endif
{
struct thr_lock_info *lock_info;
int i;
@ -598,6 +605,9 @@ void ast_store_lock_info(enum ast_lock_type type, const char *filename,
for (i = 0; i < lock_info->num_locks; i++) {
if (lock_info->locks[i].lock_addr == lock_addr) {
lock_info->locks[i].times_locked++;
#ifdef HAVE_BKTR
lock_info->locks[i].backtrace = bt;
#endif
pthread_mutex_unlock(&lock_info->lock);
return;
}
@ -628,6 +638,9 @@ void ast_store_lock_info(enum ast_lock_type type, const char *filename,
lock_info->locks[i].times_locked = 1;
lock_info->locks[i].type = type;
lock_info->locks[i].pending = 1;
#ifdef HAVE_BKTR
lock_info->locks[i].backtrace = bt;
#endif
lock_info->num_locks++;
pthread_mutex_unlock(&lock_info->lock);
@ -661,8 +674,11 @@ void ast_mark_lock_failed(void *lock_addr)
}
pthread_mutex_unlock(&lock_info->lock);
}
#ifdef HAVE_BKTR
void ast_remove_lock_info(void *lock_addr, struct ast_bt *bt)
#else
void ast_remove_lock_info(void *lock_addr)
#endif
{
struct thr_lock_info *lock_info;
int i = 0;
@ -685,6 +701,9 @@ void ast_remove_lock_info(void *lock_addr)
if (lock_info->locks[i].times_locked > 1) {
lock_info->locks[i].times_locked--;
#ifdef HAVE_BKTR
lock_info->locks[i].backtrace = bt;
#endif
pthread_mutex_unlock(&lock_info->lock);
return;
}
@ -714,6 +733,30 @@ static const char *locktype2str(enum ast_lock_type type)
return "UNKNOWN";
}
#ifdef HAVE_BKTR
static void append_backtrace_information(struct ast_str **str, struct ast_bt *bt)
{
char **symbols;
if (!bt) {
ast_str_append(str, 0, "\tNo backtrace to print\n");
return;
}
if ((symbols = backtrace_symbols(bt->addresses, bt->num_frames))) {
int frame_iterator;
for (frame_iterator = 0; frame_iterator < bt->num_frames; ++frame_iterator) {
ast_str_append(str, 0, "\t%s\n", symbols[frame_iterator]);
}
free(symbols);
} else {
ast_str_append(str, 0, "\tCouldn't retrieve backtrace symbols\n");
}
}
#endif
static void append_lock_information(struct ast_str **str, struct thr_lock_info *lock_info, int i)
{
int j;
@ -728,6 +771,9 @@ static void append_lock_information(struct ast_str **str, struct thr_lock_info *
lock_info->locks[i].func, lock_info->locks[i].lock_name,
lock_info->locks[i].lock_addr,
lock_info->locks[i].times_locked);
#ifdef HAVE_BKTR
append_backtrace_information(str, lock_info->locks[i].backtrace);
#endif
if (!lock_info->locks[i].pending || lock_info->locks[i].pending == -1)
return;

14
utils/ael_main.c
Unescape View File

@ -578,7 +578,16 @@ unsigned int ast_hashtab_hash_contexts(const void *obj)
void ast_mark_lock_acquired(void *lock_addr)
{
}
#ifdef HAVE_BKTR
void ast_remove_lock_info(void *lock_addr, struct ast_bt *bt)
{
}
void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr, struct ast_bt *bt)
{
}
#else
void ast_remove_lock_info(void *lock_addr)
{
}
@ -587,5 +596,6 @@ void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr)
{
}
#endif
#endif
#endif /* HAVE_BKTR */
#endif /* !defined(LOW_MEMORY) */
#endif /* DEBUG_THREADS */

24
utils/check_expr.c
Unescape View File

@ -86,16 +86,25 @@ enum ast_lock_type {
};
#endif
#if !defined(LOW_MEMORY)
#ifdef HAVE_BKTR
void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr);
int line_num, const char *func, const char *lock_name, void *lock_addr, struct ast_bt *bt);
void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr)
int line_num, const char *func, const char *lock_name, void *lock_addr, struct ast_bt *bt)
{
/* not a lot to do in a standalone w/o threading! */
}
void ast_mark_lock_acquired(void *);
void ast_mark_lock_acquired(void *foo)
void ast_remove_lock_info(void *lock_addr, struct ast_bt *bt);
void ast_remove_lock_info(void *lock_addr, struct ast_bt *bt)
{
/* not a lot to do in a standalone w/o threading! */
}
#else
void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr);
void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr)
{
/* not a lot to do in a standalone w/o threading! */
}
@ -105,6 +114,13 @@ void ast_remove_lock_info(void *lock_addr)
{
/* not a lot to do in a standalone w/o threading! */
}
#endif /* HAVE_BKTR */
void ast_mark_lock_acquired(void *);
void ast_mark_lock_acquired(void *foo)
{
/* not a lot to do in a standalone w/o threading! */
}
#endif
static int global_lineno = 1;

14
utils/conf2ael.c
Unescape View File

@ -705,7 +705,16 @@ unsigned int ast_hashtab_hash_contexts(const void *obj)
void ast_mark_lock_acquired(void *lock_addr)
{
}
#ifdef HAVE_BKTR
void ast_remove_lock_info(void *lock_addr, struct ast_bt *bt)
{
}
void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr, struct ast_bt *bt)
{
}
#else
void ast_remove_lock_info(void *lock_addr)
{
}
@ -714,5 +723,6 @@ void ast_store_lock_info(enum ast_lock_type type, const char *filename,
int line_num, const char *func, const char *lock_name, void *lock_addr)
{
}
#endif
#endif
#endif /* HAVE_BKTR */
#endif /* !defined(LOW_MEMORY) */
#endif /* DEBUG_THREADS */

20
utils/hashtest.c
Unescape View File

@ -366,3 +366,23 @@ void ast_register_thread(char *name)
void ast_unregister_thread(void *id)
{
}
#ifdef HAVE_BKTR
struct ast_bt *ast_bt_create(void);
struct ast_bt *ast_bt_create(void)
{
return NULL;
}
int ast_bt_get_addresses(struct ast_bt *bt);
int ast_bt_get_addresses(struct ast_bt *bt)
{
return 0;
}
void *ast_bt_destroy(struct ast_bt *bt);
void *ast_bt_destroy(struct ast_bt *bt)
{
return NULL;
}
#endif

17
utils/hashtest2.c
Unescape View File

@ -378,3 +378,20 @@ void ast_register_thread(char *name)
void ast_unregister_thread(void *id)
{
}
#ifdef HAVE_BKTR
struct ast_bt* ast_bt_create(void)
{
return NULL;
}
int ast_bt_get_addresses(struct ast_bt *bt)
{
return -1;
}
void *ast_bt_destroy(struct ast_bt *bt)
{
return NULL;
}
#endif

19
utils/refcounter.c
Unescape View File

@ -269,3 +269,22 @@ void ast_register_thread(char *name)
void ast_unregister_thread(void *id)
{
}
#ifdef HAVE_BKTR
struct ast_bt *ast_bt_create(void);
struct ast_bt *ast_bt_create(void)
{
return NULL;
}
int ast_bt_get_addresses(struct ast_bt *bt);
int ast_bt_get_addresses(struct ast_bt *bt)
{
return 0;
}
void *ast_bt_destroy(struct ast_bt *bt);
void *ast_bt_destroy(struct ast_bt *bt)
{
return NULL;
}
#endif

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