| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_ARGUMENTS_H_ |
| #define V8_ARGUMENTS_H_ |
| |
| #include "allocation.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Arguments provides access to runtime call parameters. |
| // |
| // It uses the fact that the instance fields of Arguments |
| // (length_, arguments_) are "overlayed" with the parameters |
| // (no. of parameters, and the parameter pointer) passed so |
| // that inside the C++ function, the parameters passed can |
| // be accessed conveniently: |
| // |
| // Object* Runtime_function(Arguments args) { |
| // ... use args[i] here ... |
| // } |
| |
| class Arguments BASE_EMBEDDED { |
| public: |
| Arguments(int length, Object** arguments) |
| : length_(length), arguments_(arguments) { } |
| |
| Object*& operator[] (int index) { |
| ASSERT(0 <= index && index < length_); |
| return *(reinterpret_cast<Object**>(reinterpret_cast<intptr_t>(arguments_) - |
| index * kPointerSize)); |
| } |
| |
| template <class S> Handle<S> at(int index) { |
| Object** value = &((*this)[index]); |
| // This cast checks that the object we're accessing does indeed have the |
| // expected type. |
| S::cast(*value); |
| return Handle<S>(reinterpret_cast<S**>(value)); |
| } |
| |
| int smi_at(int index) { |
| return Smi::cast((*this)[index])->value(); |
| } |
| |
| double number_at(int index) { |
| return (*this)[index]->Number(); |
| } |
| |
| // Get the total number of arguments including the receiver. |
| int length() const { return length_; } |
| |
| Object** arguments() { return arguments_; } |
| |
| private: |
| int length_; |
| Object** arguments_; |
| }; |
| |
| |
| // mappings from old property callbacks to new ones |
| // F(old name, new name, return value, parameters...) |
| // |
| // These aren't included in the list as they have duplicate signatures |
| // F(NamedPropertyEnumerator, NamedPropertyEnumeratorCallback, ...) |
| // F(NamedPropertyGetter, NamedPropertyGetterCallback, ...) |
| |
| #define FOR_EACH_CALLBACK_TABLE_MAPPING_0(F) \ |
| F(IndexedPropertyEnumerator, IndexedPropertyEnumeratorCallback, v8::Array) \ |
| |
| #define FOR_EACH_CALLBACK_TABLE_MAPPING_1(F) \ |
| F(AccessorGetter, AccessorGetterCallback, v8::Value, v8::Local<v8::String>) \ |
| F(NamedPropertyQuery, \ |
| NamedPropertyQueryCallback, \ |
| v8::Integer, \ |
| v8::Local<v8::String>) \ |
| F(NamedPropertyDeleter, \ |
| NamedPropertyDeleterCallback, \ |
| v8::Boolean, \ |
| v8::Local<v8::String>) \ |
| F(IndexedPropertyGetter, \ |
| IndexedPropertyGetterCallback, \ |
| v8::Value, \ |
| uint32_t) \ |
| F(IndexedPropertyQuery, \ |
| IndexedPropertyQueryCallback, \ |
| v8::Integer, \ |
| uint32_t) \ |
| F(IndexedPropertyDeleter, \ |
| IndexedPropertyDeleterCallback, \ |
| v8::Boolean, \ |
| uint32_t) \ |
| |
| #define FOR_EACH_CALLBACK_TABLE_MAPPING_2(F) \ |
| F(NamedPropertySetter, \ |
| NamedPropertySetterCallback, \ |
| v8::Value, \ |
| v8::Local<v8::String>, \ |
| v8::Local<v8::Value>) \ |
| F(IndexedPropertySetter, \ |
| IndexedPropertySetterCallback, \ |
| v8::Value, \ |
| uint32_t, \ |
| v8::Local<v8::Value>) \ |
| |
| #define FOR_EACH_CALLBACK_TABLE_MAPPING_2_VOID_RETURN(F) \ |
| F(AccessorSetter, \ |
| AccessorSetterCallback, \ |
| void, \ |
| v8::Local<v8::String>, \ |
| v8::Local<v8::Value>) \ |
| |
| // All property callbacks as well as invocation callbacks |
| #define FOR_EACH_CALLBACK_TABLE_MAPPING(F) \ |
| F(InvocationCallback, FunctionCallback) \ |
| F(AccessorGetter, AccessorGetterCallback) \ |
| F(AccessorSetter, AccessorSetterCallback) \ |
| F(NamedPropertySetter, NamedPropertySetterCallback) \ |
| F(NamedPropertyQuery, NamedPropertyQueryCallback) \ |
| F(NamedPropertyDeleter, NamedPropertyDeleterCallback) \ |
| F(IndexedPropertyGetter, IndexedPropertyGetterCallback) \ |
| F(IndexedPropertySetter, IndexedPropertySetterCallback) \ |
| F(IndexedPropertyQuery, IndexedPropertyQueryCallback) \ |
| F(IndexedPropertyDeleter, IndexedPropertyDeleterCallback) \ |
| F(IndexedPropertyEnumerator, IndexedPropertyEnumeratorCallback) \ |
| |
| |
| // TODO(dcarney): Remove this class when old callbacks are gone. |
| class CallbackTable { |
| public: |
| static const bool kStoreVoidFunctions = false; |
| static inline bool ReturnsVoid(Isolate* isolate, void* function) { |
| CallbackTable* table = isolate->callback_table(); |
| bool contains = |
| table != NULL && |
| table->map_.occupancy() != 0 && |
| table->Contains(function); |
| return contains == kStoreVoidFunctions; |
| } |
| |
| STATIC_ASSERT(sizeof(intptr_t) == sizeof(AccessorGetterCallback)); |
| |
| template<typename F> |
| static inline void* FunctionToVoidPtr(F function) { |
| return reinterpret_cast<void*>(reinterpret_cast<intptr_t>(function)); |
| } |
| |
| #define WRITE_REGISTER(OldFunction, NewFunction) \ |
| static NewFunction Register(Isolate* isolate, OldFunction f) { \ |
| InsertCallback(isolate, FunctionToVoidPtr(f), false); \ |
| return reinterpret_cast<NewFunction>(f); \ |
| } \ |
| \ |
| static NewFunction Register(Isolate* isolate, NewFunction f) { \ |
| InsertCallback(isolate, FunctionToVoidPtr(f), true); \ |
| return f; \ |
| } |
| FOR_EACH_CALLBACK_TABLE_MAPPING(WRITE_REGISTER) |
| #undef WRITE_REGISTER |
| |
| private: |
| CallbackTable(); |
| bool Contains(void* function); |
| static void InsertCallback(Isolate* isolate, |
| void* function, |
| bool returns_void); |
| HashMap map_; |
| DISALLOW_COPY_AND_ASSIGN(CallbackTable); |
| }; |
| |
| |
| // Custom arguments replicate a small segment of stack that can be |
| // accessed through an Arguments object the same way the actual stack |
| // can. |
| template<int kArrayLength> |
| class CustomArgumentsBase : public Relocatable { |
| public: |
| virtual inline void IterateInstance(ObjectVisitor* v) { |
| v->VisitPointers(values_, values_ + kArrayLength); |
| } |
| protected: |
| inline Object** end() { return values_ + kArrayLength - 1; } |
| explicit inline CustomArgumentsBase(Isolate* isolate) |
| : Relocatable(isolate) {} |
| Object* values_[kArrayLength]; |
| }; |
| |
| |
| template<typename T> |
| class CustomArguments : public CustomArgumentsBase<T::kArgsLength> { |
| public: |
| static const int kReturnValueOffset = T::kReturnValueIndex; |
| |
| typedef CustomArgumentsBase<T::kArgsLength> Super; |
| ~CustomArguments() { |
| // TODO(dcarney): create a new zap value for this. |
| this->end()[kReturnValueOffset] = |
| reinterpret_cast<Object*>(kHandleZapValue); |
| } |
| |
| protected: |
| explicit inline CustomArguments(Isolate* isolate) : Super(isolate) {} |
| |
| template<typename V> |
| v8::Handle<V> GetReturnValue(Isolate* isolate); |
| |
| inline Isolate* isolate() { |
| return reinterpret_cast<Isolate*>(this->end()[T::kIsolateIndex]); |
| } |
| }; |
| |
| |
| class PropertyCallbackArguments |
| : public CustomArguments<PropertyCallbackInfo<Value> > { |
| public: |
| typedef PropertyCallbackInfo<Value> T; |
| typedef CustomArguments<T> Super; |
| static const int kArgsLength = T::kArgsLength; |
| static const int kThisIndex = T::kThisIndex; |
| static const int kHolderIndex = T::kHolderIndex; |
| |
| PropertyCallbackArguments(Isolate* isolate, |
| Object* data, |
| Object* self, |
| JSObject* holder) |
| : Super(isolate) { |
| Object** values = this->end(); |
| values[T::kThisIndex] = self; |
| values[T::kHolderIndex] = holder; |
| values[T::kDataIndex] = data; |
| values[T::kIsolateIndex] = reinterpret_cast<Object*>(isolate); |
| // Here the hole is set as default value. |
| // It cannot escape into js as it's remove in Call below. |
| values[T::kReturnValueDefaultValueIndex] = |
| isolate->heap()->the_hole_value(); |
| values[T::kReturnValueIndex] = isolate->heap()->the_hole_value(); |
| ASSERT(values[T::kHolderIndex]->IsHeapObject()); |
| ASSERT(values[T::kIsolateIndex]->IsSmi()); |
| } |
| |
| /* |
| * The following Call functions wrap the calling of all callbacks to handle |
| * calling either the old or the new style callbacks depending on which one |
| * has been registered. |
| * For old callbacks which return an empty handle, the ReturnValue is checked |
| * and used if it's been set to anything inside the callback. |
| * New style callbacks always use the return value. |
| */ |
| #define WRITE_CALL_0(OldFunction, NewFunction, ReturnValue) \ |
| v8::Handle<ReturnValue> Call(OldFunction f); \ |
| |
| #define WRITE_CALL_1(OldFunction, NewFunction, ReturnValue, Arg1) \ |
| v8::Handle<ReturnValue> Call(OldFunction f, Arg1 arg1); \ |
| |
| #define WRITE_CALL_2(OldFunction, NewFunction, ReturnValue, Arg1, Arg2) \ |
| v8::Handle<ReturnValue> Call(OldFunction f, Arg1 arg1, Arg2 arg2); \ |
| |
| #define WRITE_CALL_2_VOID(OldFunction, NewFunction, ReturnValue, Arg1, Arg2) \ |
| void Call(OldFunction f, Arg1 arg1, Arg2 arg2); \ |
| |
| FOR_EACH_CALLBACK_TABLE_MAPPING_0(WRITE_CALL_0) |
| FOR_EACH_CALLBACK_TABLE_MAPPING_1(WRITE_CALL_1) |
| FOR_EACH_CALLBACK_TABLE_MAPPING_2(WRITE_CALL_2) |
| FOR_EACH_CALLBACK_TABLE_MAPPING_2_VOID_RETURN(WRITE_CALL_2_VOID) |
| |
| #undef WRITE_CALL_0 |
| #undef WRITE_CALL_1 |
| #undef WRITE_CALL_2 |
| #undef WRITE_CALL_2_VOID |
| }; |
| |
| |
| class FunctionCallbackArguments |
| : public CustomArguments<FunctionCallbackInfo<Value> > { |
| public: |
| typedef FunctionCallbackInfo<Value> T; |
| typedef CustomArguments<T> Super; |
| static const int kArgsLength = T::kArgsLength; |
| |
| FunctionCallbackArguments(internal::Isolate* isolate, |
| internal::Object* data, |
| internal::JSFunction* callee, |
| internal::Object* holder, |
| internal::Object** argv, |
| int argc, |
| bool is_construct_call) |
| : Super(isolate), |
| argv_(argv), |
| argc_(argc), |
| is_construct_call_(is_construct_call) { |
| Object** values = end(); |
| values[T::kDataIndex] = data; |
| values[T::kCalleeIndex] = callee; |
| values[T::kHolderIndex] = holder; |
| values[T::kIsolateIndex] = reinterpret_cast<internal::Object*>(isolate); |
| // Here the hole is set as default value. |
| // It cannot escape into js as it's remove in Call below. |
| values[T::kReturnValueDefaultValueIndex] = |
| isolate->heap()->the_hole_value(); |
| values[T::kReturnValueIndex] = isolate->heap()->the_hole_value(); |
| ASSERT(values[T::kCalleeIndex]->IsJSFunction()); |
| ASSERT(values[T::kHolderIndex]->IsHeapObject()); |
| ASSERT(values[T::kIsolateIndex]->IsSmi()); |
| } |
| |
| /* |
| * The following Call function wraps the calling of all callbacks to handle |
| * calling either the old or the new style callbacks depending on which one |
| * has been registered. |
| * For old callbacks which return an empty handle, the ReturnValue is checked |
| * and used if it's been set to anything inside the callback. |
| * New style callbacks always use the return value. |
| */ |
| v8::Handle<v8::Value> Call(InvocationCallback f); |
| |
| private: |
| internal::Object** argv_; |
| int argc_; |
| bool is_construct_call_; |
| }; |
| |
| |
| #define DECLARE_RUNTIME_FUNCTION(Type, Name) \ |
| Type Name(int args_length, Object** args_object, Isolate* isolate) |
| |
| #define RUNTIME_FUNCTION(Type, Name) \ |
| static Type __RT_impl_##Name(Arguments args, Isolate* isolate); \ |
| Type Name(int args_length, Object** args_object, Isolate* isolate) { \ |
| Arguments args(args_length, args_object); \ |
| return __RT_impl_##Name(args, isolate); \ |
| } \ |
| static Type __RT_impl_##Name(Arguments args, Isolate* isolate) |
| |
| #define RUNTIME_ARGUMENTS(isolate, args) \ |
| args.length(), args.arguments(), isolate |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_ARGUMENTS_H_ |