[Isolates] RegExpStack and memory allocation limits (statics #6)

src/platform-win32.cc

Index: src/platform-win32.cc
===================================================================
--- src/platform-win32.cc	(revision 5002)
+++ src/platform-win32.cc	(working copy)
@@ -223,6 +223,10 @@
   return ceil(x);
 }
 
+
+static Mutex* limit_mutex = NULL;
+
+
 #ifdef _WIN64
 typedef double (*ModuloFunction)(double, double);
 
@@ -590,6 +594,7 @@
   // call this setup code within the same millisecond.
   uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis());
   srand(static_cast<unsigned int>(seed));
+  limit_mutex = CreateMutex();
 }
 
 
@@ -791,6 +796,9 @@
 
 
 static void UpdateAllocatedSpaceLimits(void* address, int size) {
+  ASSERT(limit_mutex != NULL);
+  ScopedLock lock(limit_mutex);
+
   lowest_ever_allocated = Min(lowest_ever_allocated, address);
   highest_ever_allocated =
       Max(highest_ever_allocated,