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// Copyright 2018 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_COMPILER_PER_ISOLATE_COMPILER_CACHE_H_ #define V8_COMPILER_PER_ISOLATE_COMPILER_CACHE_H_ #include "src/compiler/refs-map.h" #include "src/execution/isolate.h" #include "src/zone/zone-containers.h" namespace v8 { namespace internal { class Isolate; class Zone; namespace compiler { class ObjectData; // This class serves as a container of data that should persist across all // (optimizing) compiler runs in an isolate. For now it stores serialized data // for various common objects such as builtins, so that these objects don't have // to be serialized in each compilation job. See JSHeapBroker::InitializeRefsMap // for details. class PerIsolateCompilerCache : public ZoneObject { public: explicit PerIsolateCompilerCache(Zone* zone) : zone_(zone), refs_snapshot_(nullptr) {} bool HasSnapshot() const { return refs_snapshot_ != nullptr; } RefsMap* GetSnapshot() { DCHECK(HasSnapshot()); return refs_snapshot_; } void SetSnapshot(RefsMap* refs) { DCHECK(!HasSnapshot()); DCHECK(!refs->IsEmpty()); refs_snapshot_ = new (zone_) RefsMap(refs, zone_); DCHECK(HasSnapshot()); } Zone* zone() const { return zone_; } static void Setup(Isolate* isolate) { if (isolate->compiler_cache() == nullptr) { Zone* zone = new Zone(isolate->allocator(), "Compiler zone"); PerIsolateCompilerCache* cache = new (zone) PerIsolateCompilerCache(zone); isolate->set_compiler_utils(cache, zone); } DCHECK_NOT_NULL(isolate->compiler_cache()); } private: Zone* const zone_; RefsMap* refs_snapshot_; }; } // namespace compiler } // namespace internal } // namespace v8 #endif // V8_COMPILER_PER_ISOLATE_COMPILER_CACHE_H_