// Copyright 2013 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. #ifndef V8_ALLOCATION_SITE_SCOPES_H_ #define V8_ALLOCATION_SITE_SCOPES_H_ #include "src/handles.h" #include "src/objects.h" #include "src/objects/allocation-site.h" #include "src/objects/map.h" namespace v8 { namespace internal { // AllocationSiteContext is the base class for walking and copying a nested // boilerplate with AllocationSite and AllocationMemento support. class AllocationSiteContext { public: explicit AllocationSiteContext(Isolate* isolate) { isolate_ = isolate; } Handle<AllocationSite> top() { return top_; } Handle<AllocationSite> current() { return current_; } bool ShouldCreateMemento(Handle<JSObject> object) { return false; } Isolate* isolate() { return isolate_; } protected: void update_current_site(AllocationSite site) { *(current_.location()) = site->ptr(); } inline void InitializeTraversal(Handle<AllocationSite> site); private: Isolate* isolate_; Handle<AllocationSite> top_; Handle<AllocationSite> current_; }; // AllocationSiteUsageContext aids in the creation of AllocationMementos placed // behind some/all components of a copied object literal. class AllocationSiteUsageContext : public AllocationSiteContext { public: AllocationSiteUsageContext(Isolate* isolate, Handle<AllocationSite> site, bool activated) : AllocationSiteContext(isolate), top_site_(site), activated_(activated) { } inline Handle<AllocationSite> EnterNewScope(); inline void ExitScope(Handle<AllocationSite> scope_site, Handle<JSObject> object); inline bool ShouldCreateMemento(Handle<JSObject> object); static const bool kCopying = true; private: Handle<AllocationSite> top_site_; bool activated_; }; } // namespace internal } // namespace v8 #endif // V8_ALLOCATION_SITE_SCOPES_H_