From: Rich Felker <dalias@aerifal.cx>
Date: Fri, 26 Apr 2013 21:46:58 +0000 (-0400)
Subject: synccall signal handler need not handle dead threads anymore
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=47d2bf5103fe7c65ae8dd18ba28704f143cdc9b4

synccall signal handler need not handle dead threads anymore

they have already blocked signals before decrementing the thread
count, so the code being removed is unreachable in the case where the
thread is no longer counted.
---

diff --git a/src/thread/synccall.c b/src/thread/synccall.c
index 8c825ace..706c8e73 100644
--- a/src/thread/synccall.c
+++ b/src/thread/synccall.c
@@ -21,15 +21,6 @@ static void handler(int sig, siginfo_t *si, void *ctx)
 
 	sigqueue(self->pid, SIGSYNCCALL, (union sigval){0});
 
-	/* Threads which have already decremented themselves from the
-	 * thread count must not act. Block further receipt of signals
-	 * and return. */
-	if (self->dead) {
-		memset(&((ucontext_t *)ctx)->uc_sigmask, -1, 8);
-		errno = old_errno;
-		return;
-	}
-
 	sem_init(&ch.sem, 0, 0);
 	sem_init(&ch.sem2, 0, 0);