Use PAGE_NOACCESS for guard pages in Windows.

src/platform-posix.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 134 matching lines @@
 #else
   mprotect(address, size, PROT_READ | PROT_EXEC);
 #endif
 }
 
 
 // Create guard pages.
 void OS::Guard(void* address, const size_t size) {
 #if defined(__CYGWIN__)
   DWORD oldprotect;
-  VirtualProtect(address, size, PAGE_READONLY | PAGE_GUARD, &oldprotect);
+  VirtualProtect(address, size, PAGE_NOACCESS, &oldprotect);
 #else
   mprotect(address, size, PROT_NONE);
 #endif
 }
 
 
 void* OS::GetRandomMmapAddr() {
 #if defined(__native_client__)
   // TODO(bradchen): restore randomization once Native Client gets
   // smarter about using mmap address hints.
@@ skipping 567 matching lines @@
 
 void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
   pthread_key_t pthread_key = LocalKeyToPthreadKey(key);
   int result = pthread_setspecific(pthread_key, value);
   ASSERT_EQ(0, result);
   USE(result);
 }
 
 
 } }  // namespace v8::internal