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             : namespace v8 {
       9             : namespace internal {
      10             : 
      11             : class Builtins;
      12             : class Code;
      13             : class Heap;
      14             : class Isolate;
      15             : 
      16             : namespace interpreter {
      17             : class Interpreter;
      18             : }  // namespace interpreter
      19             : 
      20             : // This class is an abstraction layer around initialization of components
      21             : // that are either deserialized from the snapshot or generated from scratch.
      22             : // Currently this includes builtins and interpreter bytecode handlers.
      23             : // There are two implementations to choose from at link time:
      24             : // - setup-isolate-deserialize.cc: always loads things from snapshot.
      25             : // - setup-isolate-full.cc: loads from snapshot or bootstraps from scratch,
      26             : //                          controlled by the |create_heap_objects| flag.
      27             : // For testing, the implementation in setup-isolate-for-tests.cc can be chosen
      28             : // to force the behavior of setup-isolate-full.cc at runtime.
      29             : //
      30             : // The actual implementations of generation of builtins and handlers is in
      31             : // setup-builtins-internal.cc and setup-interpreter-internal.cc, and is
      32             : // linked in by the latter two Delegate implementations.
      33             : class SetupIsolateDelegate {
      34             :  public:
      35             :   explicit SetupIsolateDelegate(bool create_heap_objects)
      36       61534 :       : create_heap_objects_(create_heap_objects) {}
      37       61534 :   virtual ~SetupIsolateDelegate() = default;
      38             : 
      39             :   virtual void SetupBuiltins(Isolate* isolate);
      40             : 
      41             :   virtual bool SetupHeap(Heap* heap);
      42             : 
      43             :  protected:
      44             :   static void SetupBuiltinsInternal(Isolate* isolate);
      45             :   static void AddBuiltin(Builtins* builtins, int index, Code code);
      46             :   static void PopulateWithPlaceholders(Isolate* isolate);
      47             :   static void ReplacePlaceholders(Isolate* isolate);
      48             : 
      49             :   static bool SetupHeapInternal(Heap* heap);
      50             : 
      51             :   const bool create_heap_objects_;
      52             : };
      53             : 
      54             : }  // namespace internal
      55             : }  // namespace v8
      56             : 
      57             : #endif  // V8_SETUP_ISOLATE_H_