Allow direct allocation in old pointer space.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 53b5ce1c4eeb8ea71eb74f4cf235ce5efd3a3ac0..f8273b701247ebc7a3429fc4e6723d8353c1c718 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -9044,6 +9044,27 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_AllocateInNewSpace) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_AllocateInOldPointerSpace) {
+  // Allocate a block of memory in old pointer space (filled with a filler).
+  // Use as fallback for allocation in generated code when old pointer space
+  // is full.
+  ASSERT(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(Smi, size_smi, 0);
+  int size = size_smi->value();
+  RUNTIME_ASSERT(IsAligned(size, kPointerSize));
+  RUNTIME_ASSERT(size > 0);
+  Heap* heap = isolate->heap();
+  Object* allocation;
+  { MaybeObject* maybe_allocation =
+        heap->old_pointer_space()->AllocateRaw(size);
+    if (maybe_allocation->ToObject(&allocation)) {
+      heap->CreateFillerObjectAt(HeapObject::cast(allocation)->address(), size);
+    }
+    return maybe_allocation;
+  }
+}
+
+
 // Push an object unto an array of objects if it is not already in the
 // array.  Returns true if the element was pushed on the stack and
 // false otherwise.