setjmp: optimize longjmp prologues

[musl] / src / thread / pthread_create.c

diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c
index 6bdfb44..10f1b7d 100644 (file)
--- a/src/thread/pthread_create.c
+++ b/src/thread/pthread_create.c
@@ -72,12 +72,13 @@ _Noreturn void __pthread_exit(void *result)
        /* Access to target the exiting thread with syscalls that use
         * its kernel tid is controlled by killlock. For detached threads,
         * any use past this point would have undefined behavior, but for
-        * joinable threads it's a valid usage that must be handled. */
+        * joinable threads it's a valid usage that must be handled.
+        * Signals must be blocked since pthread_kill must be AS-safe. */
+       __block_app_sigs(&set);
        LOCK(self->killlock);
 
-       /* The thread list lock must be AS-safe, and thus requires
-        * application signals to be blocked before it can be taken. */
-       __block_app_sigs(&set);
+       /* The thread list lock must be AS-safe, and thus depends on
+        * application signals being blocked above. */
        __tl_lock();
 
        /* If this is the only thread in the list, don't proceed with
@@ -85,8 +86,8 @@ _Noreturn void __pthread_exit(void *result)
         * signal state to prepare for exit to call atexit handlers. */
        if (self->next == self) {
                __tl_unlock();
-               __restore_sigs(&set);
                UNLOCK(self->killlock);
+               __restore_sigs(&set);
                exit(0);
        }