From f1255c8fd8cb5f2b812d66c6d101ea551015ab6b Mon Sep 17 00:00:00 2001
From: Joel Dice <joel.dice@gmail.com>
Date: Fri, 25 Feb 2011 08:13:25 -0700
Subject: [PATCH] use pthread_sigmask instead of sigprocmask to unblock signals

Apparently, the behavior of the latter is undefined in multithreaded
processes.
---
 src/posix.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/posix.cpp b/src/posix.cpp
index b885e422fc..3fcbb218de 100644
--- a/src/posix.cpp
+++ b/src/posix.cpp
@@ -924,10 +924,9 @@ handleSignal(int signal, siginfo_t* info, void* context)
       // supposed to work.
 
       sigset_t set;
-
       sigemptyset(&set);
       sigaddset(&set, signal);
-      sigprocmask(SIG_UNBLOCK, &set, 0);
+      pthread_sigmask(SIG_UNBLOCK, &set, 0);
 
       vmJump(ip, frame, stack, thread, 0, 0);
     }