fix async thread cancellation stack alignment

[musl] / src / thread / pthread_cancel.c

diff --git a/src/thread/pthread_cancel.c b/src/thread/pthread_cancel.c
index 2d3a98e..139a6fc 100644 (file)
--- a/src/thread/pthread_cancel.c
+++ b/src/thread/pthread_cancel.c
@@ -56,7 +56,12 @@ static void cancel_handler(int sig, siginfo_t *si, void *ctx)
 
        _sigaddset(&uc->uc_sigmask, SIGCANCEL);
 
-       if (self->cancelasync || pc >= (uintptr_t)__cp_begin && pc < (uintptr_t)__cp_end) {
+       if (self->cancelasync) {
+               pthread_sigmask(SIG_SETMASK, &uc->uc_sigmask, 0);
+               __cancel();
+       }
+
+       if (pc >= (uintptr_t)__cp_begin && pc < (uintptr_t)__cp_end) {
                uc->uc_mcontext.MC_PC = (uintptr_t)__cp_cancel;
 #ifdef CANCEL_GOT
                uc->uc_mcontext.MC_GOT = CANCEL_GOT;