Do not make heap iterable eagerly.

src/liveedit.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 #include "src/v8.h"
 
 #include "src/liveedit.h"
 
 #include "src/code-stubs.h"
@@ skipping 1170 matching lines @@
 void LiveEdit::ReplaceFunctionCode(
     Handle<JSArray> new_compile_info_array,
     Handle<JSArray> shared_info_array) {
   Isolate* isolate = new_compile_info_array->GetIsolate();
 
   FunctionInfoWrapper compile_info_wrapper(new_compile_info_array);
   SharedInfoWrapper shared_info_wrapper(shared_info_array);
 
   Handle<SharedFunctionInfo> shared_info = shared_info_wrapper.GetInfo();
 
-  isolate->heap()->MakeHeapIterable();
-
   if (IsJSFunctionCode(shared_info->code())) {
     Handle<Code> code = compile_info_wrapper.GetFunctionCode();
     ReplaceCodeObject(Handle<Code>(shared_info->code()), code);
     Handle<Object> code_scope_info = compile_info_wrapper.GetCodeScopeInfo();
     if (code_scope_info->IsFixedArray()) {
       shared_info->set_scope_info(ScopeInfo::cast(*code_scope_info));
     }
     shared_info->DisableOptimization(kLiveEdit);
     // Update the type feedback vector
     Handle<FixedArray> feedback_vector =
@@ skipping 215 matching lines @@
                                              position_change_array);
   int new_function_end = TranslatePosition(info->end_position(),
                                            position_change_array);
   int new_function_token_pos =
       TranslatePosition(info->function_token_position(), position_change_array);
 
   info->set_start_position(new_function_start);
   info->set_end_position(new_function_end);
   info->set_function_token_position(new_function_token_pos);
 
-  info->GetIsolate()->heap()->MakeHeapIterable();
-
   if (IsJSFunctionCode(info->code())) {
     // Patch relocation info section of the code.
     Handle<Code> patched_code = PatchPositionsInCode(Handle<Code>(info->code()),
                                                      position_change_array);
     if (*patched_code != info->code()) {
       // Replace all references to the code across the heap. In particular,
       // some stubs may refer to this code and this code may be being executed
       // on stack (it is safe to substitute the code object on stack, because
       // we only change the structure of rinfo and leave instructions
       // untouched).
@@ skipping 636 matching lines @@
 void LiveEditFunctionTracker::RecordRootFunctionInfo(Handle<Code> code) {
   isolate_->active_function_info_listener()->FunctionCode(code);
 }
 
 
 bool LiveEditFunctionTracker::IsActive(Isolate* isolate) {
   return isolate->active_function_info_listener() != NULL;
 }
 
 } }  // namespace v8::internal