Share optimized code for closures.

src/objects.cc

Index: src/objects.cc
===================================================================
--- src/objects.cc	(revision 11394)
+++ src/objects.cc	(working copy)
@@ -7918,6 +7918,23 @@
 }
 
 
+Code* SharedFunctionInfo::SearchOptimizedCodeMap(Context* global_context) {
+  ASSERT(global_context->IsGlobalContext());
+  Object* value = optimized_code_map();
+  if (!value->IsSmi()) {
+    FixedArray* optimized_code_map = FixedArray::cast(value);
+    int length = optimized_code_map->length();
+    for (int i = 0; i < length; i += 2) {
+      if (optimized_code_map->get(i) == global_context) {
+        return Code::cast(optimized_code_map->get(i + 1));
+      }
+    }
+  }
+
+  return NULL;
+}
+
+
 void SharedFunctionInfo::SharedFunctionInfoIterateBody(ObjectVisitor* v) {
   v->VisitSharedFunctionInfo(this);
   SharedFunctionInfo::BodyDescriptor::IterateBody(this, v);
@@ -8189,11 +8206,14 @@
         case Translation::JS_FRAME: {
           int ast_id = iterator.Next();
           int function_id = iterator.Next();
-          JSFunction* function =
-              JSFunction::cast(LiteralArray()->get(function_id));
           unsigned height = iterator.Next();
           PrintF(out, "{ast_id=%d, function=", ast_id);
-          function->PrintName(out);
+          if (function_id != Translation::kSelfLiteralId) {
+            Object* function = LiteralArray()->get(function_id);
+            JSFunction::cast(function)->PrintName(out);
+          } else {
+            PrintF(out, "<self>");
+          }
           PrintF(out, ", height=%u}", height);
           break;
         }