From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 4 Feb 2016 22:59:13 +0000 (+0000)
Subject: avoid using signals when a thread attempts to cancel itself
X-Git-Tag: v1.1.13~8
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=aecda35373511c5bf02c0f708bd262adb1a09287;p=oweals%2Fmusl.git

avoid using signals when a thread attempts to cancel itself

not only is pthread_kill expensive in this case; it also breaks
testing under qemu app-level emulation.
---

diff --git a/src/thread/pthread_cancel.c b/src/thread/pthread_cancel.c
index a21c3866..3d229223 100644
--- a/src/thread/pthread_cancel.c
+++ b/src/thread/pthread_cancel.c
@@ -92,5 +92,6 @@ int pthread_cancel(pthread_t t)
 		init = 1;
 	}
 	a_store(&t->cancel, 1);
+	if (t == pthread_self() && !t->cancelasync) return 0;
 	return pthread_kill(t, SIGCANCEL);
 }