8021954: VM SIGSEGV during classloading on MacOS; hs_err_pid file produced

Declare all user-defined operator new()s within Hotspot code with the empty throw() exception specification

Reviewed-by: coleenp, twisti, dholmes, hseigel, dcubed, kvn, ccheung
diff --git a/hotspot/src/share/vm/memory/memRegion.cpp b/hotspot/src/share/vm/memory/memRegion.cpp
index baabdb8..9eb2be5 100644
--- a/hotspot/src/share/vm/memory/memRegion.cpp
+++ b/hotspot/src/share/vm/memory/memRegion.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -102,11 +102,11 @@
   return MemRegion();
 }
 
-void* MemRegion::operator new(size_t size) {
+void* MemRegion::operator new(size_t size) throw() {
   return (address)AllocateHeap(size, mtGC, 0, AllocFailStrategy::RETURN_NULL);
 }
 
-void* MemRegion::operator new [](size_t size) {
+void* MemRegion::operator new [](size_t size) throw() {
   return (address)AllocateHeap(size, mtGC, 0, AllocFailStrategy::RETURN_NULL);
 }
 void  MemRegion::operator delete(void* p) {