Postpone interrupts during marking garbage collection. This allows the check...

Postpone interrupts during marking garbage collection.  This allows the check for C stack overflow to function correctly.
Review URL: http://codereview.chromium.org/5685010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6006 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mark-compact.cc

@@ -1281,6 +1281,11 @@ void MarkCompactCollector::ProcessObjectGroups() {
 
 void MarkCompactCollector::MarkLiveObjects() {
   GCTracer::Scope gc_scope(tracer_, GCTracer::Scope::MC_MARK);
+  // The recursive GC marker detects when it is nearing stack overflow,
+  // and switches to a different marking system.  JS interrupts interfere
+  // with the C stack limit check.
+  PostponeInterruptsScope postpone;
+
 #ifdef DEBUG
   ASSERT(state_ == PREPARE_GC);
   state_ = MARK_LIVE_OBJECTS;