Add a second kind of HandleScope that ties the lifetime of Handles created in its scope to the life…

src/compiler.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 43 matching lines @@
 CompilationInfo::CompilationInfo(Handle<Script> script, Zone* zone)
     : isolate_(script->GetIsolate()),
       flags_(LanguageModeField::encode(CLASSIC_MODE)),
       function_(NULL),
       scope_(NULL),
       global_scope_(NULL),
       script_(script),
       extension_(NULL),
       pre_parse_data_(NULL),
       osr_ast_id_(AstNode::kNoNumber),
-      zone_(zone) {
+      zone_(zone),
+      hidden_extensions_(NULL) {
   Initialize(BASE);
 }
 
 
 CompilationInfo::CompilationInfo(Handle<SharedFunctionInfo> shared_info,
                                  Zone* zone)
     : isolate_(shared_info->GetIsolate()),
       flags_(LanguageModeField::encode(CLASSIC_MODE) |
              IsLazy::encode(true)),
       function_(NULL),
       scope_(NULL),
       global_scope_(NULL),
       shared_info_(shared_info),
       script_(Handle<Script>(Script::cast(shared_info->script()))),
       extension_(NULL),
       pre_parse_data_(NULL),
       osr_ast_id_(AstNode::kNoNumber),
-      zone_(zone) {
+      zone_(zone),
+      hidden_extensions_(NULL) {
   Initialize(BASE);
 }
 
 
 CompilationInfo::CompilationInfo(Handle<JSFunction> closure, Zone* zone)
     : isolate_(closure->GetIsolate()),
       flags_(LanguageModeField::encode(CLASSIC_MODE) |
              IsLazy::encode(true)),
       function_(NULL),
       scope_(NULL),
       global_scope_(NULL),
       closure_(closure),
       shared_info_(Handle<SharedFunctionInfo>(closure->shared())),
       script_(Handle<Script>(Script::cast(shared_info_->script()))),
       extension_(NULL),
       pre_parse_data_(NULL),
       osr_ast_id_(AstNode::kNoNumber),
-      zone_(zone) {
+      zone_(zone),
+      hidden_extensions_(NULL) {
   Initialize(BASE);
 }
 
 
+CompilationInfo::~CompilationInfo() {
+  if (hidden_extensions_) {
+    HandleScopeImplementer* impl = isolate_->handle_scope_implementer();
+    impl->DeleteHiddenExtensions(hidden_extensions_);
+  }
+}
+
+
 // Disable optimization for the rest of the compilation pipeline.
 void CompilationInfo::DisableOptimization() {
   bool is_optimizable_closure =
     FLAG_optimize_closures &&
     closure_.is_null() &&
     !scope_->HasTrivialOuterContext() &&
     !scope_->outer_scope_calls_non_strict_eval() &&
     !scope_->inside_with();
   SetMode(is_optimizable_closure ? BASE : NONOPT);
 }
@@ skipping 756 matching lines @@
     }
   }
 
   GDBJIT(AddCode(Handle<String>(shared->DebugName()),
                  Handle<Script>(info->script()),
                  Handle<Code>(info->code()),
                  info));
 }
 
 } }  // namespace v8::internal