diff -r 000000000000 -r 6474c204b198 toolkit/crashreporter/breakpad-patches/17-bug942407-usersig.patch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/crashreporter/breakpad-patches/17-bug942407-usersig.patch	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+# HG changeset patch
+# User Jed Davis <jld@mozilla.com>
+
+Bug 942407: Fix breakpad signal handler's test for signal origin. r=ted
+
+
+diff --git a/toolkit/crashreporter/google-breakpad/src/client/linux/handler/exception_handler.cc b/toolkit/crashreporter/google-breakpad/src/client/linux/handler/exception_handler.cc
+index 55834e0..df958fb 100644
+--- a/toolkit/crashreporter/google-breakpad/src/client/linux/handler/exception_handler.cc
++++ b/toolkit/crashreporter/google-breakpad/src/client/linux/handler/exception_handler.cc
+@@ -334,20 +334,20 @@ void ExceptionHandler::SignalHandler(int sig, siginfo_t* info, void* uc) {
+   if (handled) {
+     signal(sig, SIG_DFL);
+   } else {
+     RestoreHandlersLocked();
+   }
+ 
+   pthread_mutex_unlock(&handler_stack_mutex_);
+ 
+-  if (info->si_pid) {
+-    // This signal was triggered by somebody sending us the signal with kill().
+-    // In order to retrigger it, we have to queue a new signal by calling
+-    // kill() ourselves.
++  if (info->si_code <= 0) {
++    // This signal was sent by another process.  (Positive values of
++    // si_code are reserved for kernel-originated signals.)  In order
++    // to retrigger it, we have to queue a new signal.
+     if (tgkill(getpid(), syscall(__NR_gettid), sig) < 0) {
+       // If we failed to kill ourselves (e.g. because a sandbox disallows us
+       // to do so), we instead resort to terminating our process. This will
+       // result in an incorrect exit code.
+       _exit(1);
+     }
+   } else {
+     // This was a synchronous signal triggered by a hard fault (e.g. SIGSEGV).
+-- 
+1.8.4.rc3
+