Add ability to disable inline bump-pointer allocation.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 2ba39198e1489427b56b57193ea04556695882e0..64812912272a07198db0780401fdad4f663d075b 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -114,6 +114,7 @@ Heap::Heap()
       amount_of_external_allocated_memory_(0),
       amount_of_external_allocated_memory_at_last_global_gc_(0),
       old_gen_exhausted_(false),
+      inline_allocation_disabled_(false),
       store_buffer_rebuilder_(store_buffer()),
       hidden_string_(NULL),
       gc_safe_size_of_old_object_(NULL),
@@ -6568,6 +6569,32 @@ intptr_t Heap::PromotedExternalMemorySize() {
 }
 
 
+void Heap::EnableInlineAllocation() {
+  ASSERT(inline_allocation_disabled_);
+  inline_allocation_disabled_ = false;
+
+  // Update inline allocation limit for new space.
+  new_space()->UpdateInlineAllocationLimit(0);
+}
+
+
+void Heap::DisableInlineAllocation() {
+  ASSERT(!inline_allocation_disabled_);
+  inline_allocation_disabled_ = true;
+
+  // Update inline allocation limit for new space.
+  new_space()->UpdateInlineAllocationLimit(0);
+
+  // Update inline allocation limit for old spaces.
+  PagedSpaces spaces(this);
+  for (PagedSpace* space = spaces.next();
+       space != NULL;
+       space = spaces.next()) {
+    space->EmptyAllocationInfo();
+  }
+}
+
+
 V8_DECLARE_ONCE(initialize_gc_once);
 
 static void InitializeGCOnce() {