1// Copyright 2018 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef V8_COMPILER_PER_ISOLATE_COMPILER_CACHE_H_
6#define V8_COMPILER_PER_ISOLATE_COMPILER_CACHE_H_
7
8#include "src/compiler/refs-map.h"
9#include "src/execution/isolate.h"
10#include "src/zone/zone-containers.h"
11
12namespace v8 {
13namespace internal {
14
15class Isolate;
16class Zone;
17
18namespace compiler {
19
20class ObjectData;
21
22// This class serves as a container of data that should persist across all
23// (optimizing) compiler runs in an isolate. For now it stores serialized data
24// for various common objects such as builtins, so that these objects don't have
25// to be serialized in each compilation job. See JSHeapBroker::InitializeRefsMap
26// for details.
27class PerIsolateCompilerCache : public ZoneObject {
28 public:
29  explicit PerIsolateCompilerCache(Zone* zone)
30      : zone_(zone), refs_snapshot_(nullptr) {}
31
32  bool HasSnapshot() const { return refs_snapshot_ != nullptr; }
33  RefsMap* GetSnapshot() {
34    DCHECK(HasSnapshot());
35    return refs_snapshot_;
36  }
37  void SetSnapshot(RefsMap* refs) {
38    DCHECK(!HasSnapshot());
39    DCHECK(!refs->IsEmpty());
40    refs_snapshot_ = zone_->New<RefsMap>(refs, zone_);
41    DCHECK(HasSnapshot());
42  }
43
44  Zone* zone() const { return zone_; }
45
46  static void Setup(Isolate* isolate) {
47    if (isolate->compiler_cache() == nullptr) {
48      Zone* zone = new Zone(isolate->allocator(), "Compiler zone");
49      PerIsolateCompilerCache* cache = zone->New<PerIsolateCompilerCache>(zone);
50      isolate->set_compiler_utils(cache, zone);
51    }
52    DCHECK_NOT_NULL(isolate->compiler_cache());
53  }
54
55 private:
56  Zone* const zone_;
57  RefsMap* refs_snapshot_;
58};
59
60}  // namespace compiler
61}  // namespace internal
62}  // namespace v8
63
64#endif  // V8_COMPILER_PER_ISOLATE_COMPILER_CACHE_H_
65