[sr-dev] git:5.7:e73b07e9: tls: thread-local, revert 1a9b0b6361 as double-layer locking is redundant

Module: kamailio Branch: 5.7 Commit: e73b07e9835ba5f0b89065616d8cd6390898d700 URL: https://github.com/kamailio/kamailio/commit/e73b07e9835ba5f0b89065616d8cd63… Author: S-P Chan <shihping.chan(a)gmail.com> Committer: Richard Chan <richard(a)treeboxsolutions.com> Date: 2024-01-09T10:18:55+08:00 tls: thread-local, revert 1a9b0b6361 as double-layer locking is redundant - the 2nd lock was put in place as defensive programming for shm contention - GH #3695: the underlying issue is early init of thread-locals (cherry-pick from 1c70775530b1a3a905e8a983610cb0d092b0d240) --- Modified: src/modules/tls/tls_init.c --- Diff: https://github.com/kamailio/kamailio/commit/e73b07e9835ba5f0b89065616d8cd63… Patch: https://github.com/kamailio/kamailio/commit/e73b07e9835ba5f0b89065616d8cd63… --- diff --git a/src/modules/tls/tls_init.c b/src/modules/tls/tls_init.c index 2d5a9e19420..58289c626c4 100644 --- a/src/modules/tls/tls_init.c +++ b/src/modules/tls/tls_init.c @@ -259,9 +259,6 @@ static void *ser_malloc(size_t size, const char *file, int line) static ticks_t st = 0; #endif - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_lock(ksr_tls_lock_shm); - #ifdef RAND_NULL_MALLOC /* start random null returns only after * NULL_GRACE_PERIOD from first call */ @@ -289,8 +286,6 @@ static void *ser_malloc(size_t size, const char *file, int line) size, file, line, bt_buf); } #endif - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_unlock(ksr_tls_lock_shm); return p; } @@ -304,9 +299,6 @@ static void *ser_realloc(void *ptr, size_t size, const char *file, int line) static ticks_t st = 0; #endif - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_lock(ksr_tls_lock_shm); - #ifdef RAND_NULL_MALLOC /* start random null returns only after * NULL_GRACE_PERIOD from first call */ @@ -335,21 +327,14 @@ static void *ser_realloc(void *ptr, size_t size, const char *file, int line) } #endif - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_unlock(ksr_tls_lock_shm); - return p; } static void ser_free(void *ptr, const char *fname, int fline) { - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_lock(ksr_tls_lock_shm); if(ptr) { shm_free(ptr); } - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_unlock(ksr_tls_lock_shm); } #endif /* LIBRESSL_VERSION_NUMBER */ @@ -363,11 +348,7 @@ static void *ser_malloc(size_t size) { void *p; - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_lock(ksr_tls_lock_shm); p = shm_malloc(size); - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_unlock(ksr_tls_lock_shm); return p; } @@ -375,22 +356,14 @@ static void *ser_malloc(size_t size) static void *ser_realloc(void *ptr, size_t size) { void *p; - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_lock(ksr_tls_lock_shm); p = shm_realloc(ptr, size); - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_unlock(ksr_tls_lock_shm); return p; } #else static void *ser_malloc(size_t size, const char *fname, int fline) { void *p; - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_lock(ksr_tls_lock_shm); p = shm_malloc(size); - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_unlock(ksr_tls_lock_shm); return p; } @@ -398,11 +371,7 @@ static void *ser_malloc(size_t size, const char *fname, int fline) static void *ser_realloc(void *ptr, size_t size, const char *fname, int fline) { void *p; - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_lock(ksr_tls_lock_shm); p = shm_realloc(ptr, size); - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_unlock(ksr_tls_lock_shm); return p; } #endif @@ -419,24 +388,16 @@ static void ser_free(void *ptr) * As shm_free() aborts on null pointers, we have to check for null pointer * here in the wrapper function. */ - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_lock(ksr_tls_lock_shm); if(ptr) { shm_free(ptr); } - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_unlock(ksr_tls_lock_shm); } #else static void ser_free(void *ptr, const char *fname, int fline) { - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_lock(ksr_tls_lock_shm); if(ptr) { shm_free(ptr); } - if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM) - pthread_mutex_unlock(ksr_tls_lock_shm); } #endif