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_INIT_SETUP_ISOLATE_H_ 6 #define V8_INIT_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 // This class is an abstraction layer around initialization of components 19 // that are either deserialized from the snapshot or generated from scratch. 20 // Currently this includes builtins and interpreter bytecode handlers. 21 // There are two implementations to choose from at link time: 22 // - setup-isolate-deserialize.cc: always loads things from snapshot. 23 // - setup-isolate-full.cc: loads from snapshot or bootstraps from scratch, 24 // controlled by the |create_heap_objects| flag. 25 // For testing, the implementation in setup-isolate-for-tests.cc can be chosen 26 // to force the behavior of setup-isolate-full.cc at runtime. 27 // 28 // The actual implementations of generation of builtins and handlers is in 29 // setup-builtins-internal.cc and setup-interpreter-internal.cc, and is 30 // linked in by the latter two Delegate implementations. 31 class V8_EXPORT_PRIVATE SetupIsolateDelegate { 32 public: SetupIsolateDelegate(bool create_heap_objects)33 explicit SetupIsolateDelegate(bool create_heap_objects) 34 : create_heap_objects_(create_heap_objects) {} 35 virtual ~SetupIsolateDelegate() = default; 36 37 virtual void SetupBuiltins(Isolate* isolate); 38 39 virtual bool SetupHeap(Heap* heap); 40 41 protected: 42 static void SetupBuiltinsInternal(Isolate* isolate); 43 static void AddBuiltin(Builtins* builtins, int index, Code code); 44 static void PopulateWithPlaceholders(Isolate* isolate); 45 static void ReplacePlaceholders(Isolate* isolate); 46 47 static bool SetupHeapInternal(Heap* heap); 48 49 const bool create_heap_objects_; 50 }; 51 52 } // namespace internal 53 } // namespace v8 54 55 #endif // V8_INIT_SETUP_ISOLATE_H_ 56