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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_
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