From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Thu, 28 Feb 2013 21:56:14 +0000 (+0000)
Subject: runtime: Don't block SIGTRAP while creating a new thread.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0a2f103a45756ce3d0565249faf2da041e22df6d;p=gcc.git

runtime: Don't block SIGTRAP while creating a new thread.

Thanks to Uros Bizjak.

From-SVN: r196362
---

diff --git a/libgo/runtime/proc.c b/libgo/runtime/proc.c
index b59f4acf0dc..9b563a50946 100644
--- a/libgo/runtime/proc.c
+++ b/libgo/runtime/proc.c
@@ -1256,6 +1256,12 @@ runtime_newm(void)
 	// Block signals during pthread_create so that the new thread
 	// starts with signals disabled.  It will enable them in minit.
 	sigfillset(&clear);
+
+#ifdef SIGTRAP
+	// Blocking SIGTRAP reportedly breaks gdb on Alpha GNU/Linux.
+	sigdelset(&clear, SIGTRAP);
+#endif
+
 	sigemptyset(&old);
 	sigprocmask(SIG_BLOCK, &clear, &old);
 	ret = pthread_create(&tid, &attr, runtime_mstart, mp);