Line data Source code
1 : // Copyright 2017 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_SETUP_ISOLATE_H_
6 : #define V8_SETUP_ISOLATE_H_
7 :
8 : #include "src/base/macros.h"
9 :
10 : namespace v8 {
11 : namespace internal {
12 :
13 : class Builtins;
14 : class Code;
15 : class Heap;
16 : class Isolate;
17 :
18 : namespace interpreter {
19 : class Interpreter;
20 : } // namespace interpreter
21 :
22 : // This class is an abstraction layer around initialization of components
23 : // that are either deserialized from the snapshot or generated from scratch.
24 : // Currently this includes builtins and interpreter bytecode handlers.
25 : // There are two implementations to choose from at link time:
26 : // - setup-isolate-deserialize.cc: always loads things from snapshot.
27 : // - setup-isolate-full.cc: loads from snapshot or bootstraps from scratch,
28 : // controlled by the |create_heap_objects| flag.
29 : // For testing, the implementation in setup-isolate-for-tests.cc can be chosen
30 : // to force the behavior of setup-isolate-full.cc at runtime.
31 : //
32 : // The actual implementations of generation of builtins and handlers is in
33 : // setup-builtins-internal.cc and setup-interpreter-internal.cc, and is
34 : // linked in by the latter two Delegate implementations.
35 : class V8_EXPORT_PRIVATE SetupIsolateDelegate {
36 : public:
37 : explicit SetupIsolateDelegate(bool create_heap_objects)
38 62442 : : create_heap_objects_(create_heap_objects) {}
39 62442 : virtual ~SetupIsolateDelegate() = default;
40 :
41 : virtual void SetupBuiltins(Isolate* isolate);
42 :
43 : virtual bool SetupHeap(Heap* heap);
44 :
45 : protected:
46 : static void SetupBuiltinsInternal(Isolate* isolate);
47 : static void AddBuiltin(Builtins* builtins, int index, Code code);
48 : static void PopulateWithPlaceholders(Isolate* isolate);
49 : static void ReplacePlaceholders(Isolate* isolate);
50 :
51 : static bool SetupHeapInternal(Heap* heap);
52 :
53 : const bool create_heap_objects_;
54 : };
55 :
56 : } // namespace internal
57 : } // namespace v8
58 :
59 : #endif // V8_SETUP_ISOLATE_H_
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