Rebased PNaCl localmods in LLVM to 223109

lib/Support/CrashRecoveryContext.cpp

Index: lib/Support/CrashRecoveryContext.cpp
diff --git a/lib/Support/CrashRecoveryContext.cpp b/lib/Support/CrashRecoveryContext.cpp
index 9b0e44339d8411dddf387fcb3afabc7141b1a315..2eb0885610cc80fab23c11752abfcb248fc5c3b6 100644
--- a/lib/Support/CrashRecoveryContext.cpp
+++ b/lib/Support/CrashRecoveryContext.cpp
@@ -277,6 +277,7 @@ void CrashRecoveryContext::Enable() {
 
   gCrashRecoveryEnabled = true;
 
+#if !defined(__native_client__) // @LOCALMOD
   // Setup the signal handler.
   struct sigaction Handler;
   Handler.sa_handler = CrashRecoverySignalHandler;
@@ -286,6 +287,11 @@ void CrashRecoveryContext::Enable() {
   for (unsigned i = 0; i != NumSignals; ++i) {
     sigaction(Signals[i], &Handler, &PrevActions[i]);
   }
+// @LOCALMOD-START
+#else
+#warning Cannot setup the signal handler on this machine
+#endif
+// @LOCALMOD-END
 }
 
 void CrashRecoveryContext::Disable() {
@@ -296,9 +302,11 @@ void CrashRecoveryContext::Disable() {
 
   gCrashRecoveryEnabled = false;
 
+#if !defined(__native_client__) // @LOCALMOD
   // Restore the previous signal handlers.
   for (unsigned i = 0; i != NumSignals; ++i)
     sigaction(Signals[i], &PrevActions[i], nullptr);
+#endif // @LOCALMOD
 }
 
 #endif