Reenable some heap verification and fix test to keep

heap in a consistent state.
Review URL: https://chromiumcodereview.appspot.com/10227002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11446 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/heap.cc

@@ -6142,6 +6142,11 @@ void Heap::SetStackLimits() {
 
 
 void Heap::TearDown() {
+#ifdef DEBUG
+  if (FLAG_verify_heap) {
+    Verify();
+  }
+#endif
   if (FLAG_print_cumulative_gc_stat) {
     PrintF("\n\n");
     PrintF("gc_count=%d ", gc_count_);

test/cctest/test-alloc.cc

@@ -35,6 +35,8 @@ using namespace v8::internal;
 
 
 static inline void SimulateFullSpace(PagedSpace* space) {
+  int old_linear_size = static_cast<int>(space->limit() - space->top());
+  space->Free(space->top(), old_linear_size);
   space->SetTop(space->limit(), space->limit());
   space->ResetFreeList();
   space->ClearStats();