stub-cache.h.svn-base

Google浏览器V8内核代码

  Address address() const { return address_; }

 private:
  explicit SCTableReference(Address address) : address_(address) {}

  static StubCache::Entry* first_entry(StubCache::Table table) {
    switch (table) {
      case StubCache::kPrimary: return StubCache::primary_;
      case StubCache::kSecondary: return StubCache::secondary_;
    }
    UNREACHABLE();
    return NULL;
  }

  Address address_;
};

// ------------------------------------------------------------------------


// Support functions for IC stubs for callbacks.
Object* LoadCallbackProperty(Arguments args);
Object* StoreCallbackProperty(Arguments args);


// Support functions for IC stubs for interceptors.
Object* LoadInterceptorProperty(Arguments args);
Object* StoreInterceptorProperty(Arguments args);
Object* CallInterceptorProperty(Arguments args);


// Support function for computing call IC miss stubs.
Handle<Code> ComputeCallMiss(int argc);


// The stub compiler compiles stubs for the stub cache.
class StubCompiler BASE_EMBEDDED {
 public:
  enum CheckType {
    RECEIVER_MAP_CHECK,
    STRING_CHECK,
    NUMBER_CHECK,
    BOOLEAN_CHECK,
    JSARRAY_HAS_FAST_ELEMENTS_CHECK
  };

  StubCompiler() : masm_(NULL, 256) { }

  Object* CompileCallInitialize(Code::Flags flags);
  Object* CompileCallPreMonomorphic(Code::Flags flags);
  Object* CompileCallNormal(Code::Flags flags);
  Object* CompileCallMegamorphic(Code::Flags flags);
  Object* CompileCallMiss(Code::Flags flags);
  Object* CompileCallDebugBreak(Code::Flags flags);
  Object* CompileCallDebugPrepareStepIn(Code::Flags flags);
  Object* CompileLazyCompile(Code::Flags flags);

  // Static functions for generating parts of stubs.
  static void GenerateLoadGlobalFunctionPrototype(MacroAssembler* masm,
                                                  int index,
                                                  Register prototype);
  static void GenerateLoadField(MacroAssembler* masm,
                                JSObject* object,
                                JSObject* holder,
                                Register receiver,
                                Register scratch1,
                                Register scratch2,
                                int index,
                                Label* miss_label);
  static void GenerateLoadCallback(MacroAssembler* masm,
                                   JSObject* object,
                                   JSObject* holder,
                                   Register receiver,
                                   Register name,
                                   Register scratch1,
                                   Register scratch2,
                                   AccessorInfo* callback,
                                   Label* miss_label);
  static void GenerateLoadConstant(MacroAssembler* masm,
                                   JSObject* object,
                                   JSObject* holder,
                                   Register receiver,
                                   Register scratch1,
                                   Register scratch2,
                                   Object* value,
                                   Label* miss_label);
  static void GenerateLoadInterceptor(MacroAssembler* masm,
                                      JSObject* object,
                                      JSObject* holder,
                                      Register receiver,
                                      Register name,
                                      Register scratch1,
                                      Register scratch2,
                                      Label* miss_label);
  static void GenerateLoadArrayLength(MacroAssembler* masm,
                                      Register receiver,
                                      Register scratch,
                                      Label* miss_label);
  static void GenerateLoadShortStringLength(MacroAssembler* masm,
                                            Register receiver,
                                            Register scratch,
                                            Label* miss_label);
  static void GenerateLoadMediumStringLength(MacroAssembler* masm,
                                             Register receiver,
                                             Register scratch,
                                             Label* miss_label);
  static void GenerateLoadLongStringLength(MacroAssembler* masm,
                                           Register receiver,
                                           Register scratch,
                                           Label* miss_label);
  static void GenerateLoadFunctionPrototype(MacroAssembler* masm,
                                            Register receiver,
                                            Register scratch1,
                                            Register scratch2,
                                            Label* miss_label);
  static void GenerateStoreField(MacroAssembler* masm,
                                 JSObject* object,
                                 int index,
                                 Map* transition,
                                 Register receiver_reg,
                                 Register name_reg,
                                 Register scratch,
                                 Label* miss_label);
  static void GenerateLoadMiss(MacroAssembler* masm, Code::Kind kind);

 protected:
  Object* GetCodeWithFlags(Code::Flags flags);

  MacroAssembler* masm() { return &masm_; }

 private:
  MacroAssembler masm_;
};


class LoadStubCompiler: public StubCompiler {
 public:
  Object* CompileLoadField(JSObject* object, JSObject* holder, int index);
  Object* CompileLoadCallback(JSObject* object,
                              JSObject* holder,
                              AccessorInfo* callback);
  Object* CompileLoadConstant(JSObject* object,
                              JSObject* holder,
                              Object* value);
  Object* CompileLoadInterceptor(JSObject* object,
                                 JSObject* holder,
                                 String* name);

 private:
  Object* GetCode(PropertyType);
};


class KeyedLoadStubCompiler: public StubCompiler {
 public:
  Object* CompileLoadField(String* name,
                           JSObject* object,
                           JSObject* holder,
                           int index);
  Object* CompileLoadCallback(String* name,
                              JSObject* object,
                              JSObject* holder,
                              AccessorInfo* callback);
  Object* CompileLoadConstant(String* name,
                              JSObject* object,
                              JSObject* holder,
                              Object* value);
  Object* CompileLoadInterceptor(JSObject* object,
                                 JSObject* holder,
                                 String* name);
  Object* CompileLoadArrayLength(String* name);
  Object* CompileLoadShortStringLength(String* name);
  Object* CompileLoadMediumStringLength(String* name);
  Object* CompileLoadLongStringLength(String* name);
  Object* CompileLoadFunctionPrototype(String* name);

 private:
  Object* GetCode(PropertyType);
};


class StoreStubCompiler: public StubCompiler {
 public:
  Object* CompileStoreField(JSObject* object,
                            int index,
                            Map* transition,
                            String* name);
  Object* CompileStoreCallback(JSObject* object,
                               AccessorInfo* callbacks,
                               String* name);
  Object* CompileStoreInterceptor(JSObject* object, String* name);

 private:
  Object* GetCode(PropertyType type);
};


class KeyedStoreStubCompiler: public StubCompiler {
 public:
  Object* CompileStoreField(JSObject* object,
                            int index,
                            Map* transition,
                            String* name);

 private:
  Object* GetCode(PropertyType type);
};


class CallStubCompiler: public StubCompiler {
 public:
  explicit CallStubCompiler(int argc) : arguments_(argc) { }

  Object* CompileCallField(Object* object, JSObject* holder, int index);
  Object* CompileCallConstant(Object* object,
                              JSObject* holder,
                              JSFunction* function,
                              CheckType check);
  Object* CompileCallInterceptor(Object* object,
                                 JSObject* holder,
                                 String* name);

 private:
  const ParameterCount arguments_;

  const ParameterCount& arguments() { return arguments_; }

  Object* GetCode(PropertyType type);
};


} }  // namespace v8::internal

#endif  // V8_STUB_CACHE_H_