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| 1 // Copyright 2016 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 #include "src/builtins/builtins-utils.h" | |
| 6 #include "src/builtins/builtins.h" | |
| 7 #include "src/code-factory.h" | |
| 8 #include "src/code-stub-assembler.h" | |
| 9 #include "src/isolate.h" | |
| 10 #include "src/objects-inl.h" | |
| 11 | |
| 12 namespace v8 { | |
| 13 namespace internal { | |
| 14 | |
| 15 typedef compiler::CodeAssemblerState CodeAssemblerState; | |
| 16 | |
| 17 class GeneratorBuiltinsAssembler : public CodeStubAssembler { | |
| 18 public: | |
| 19 explicit GeneratorBuiltinsAssembler(CodeAssemblerState* state) | |
| 20 : CodeStubAssembler(state) {} | |
| 21 | |
| 22 protected: | |
| 23 void GeneratorPrototypeResume(JSGeneratorObject::ResumeMode resume_mode, | |
| 24 char const* const method_name); | |
| 25 }; | |
| 26 | |
| 27 void GeneratorBuiltinsAssembler::GeneratorPrototypeResume( | |
| 28 JSGeneratorObject::ResumeMode resume_mode, char const* const method_name) { | |
| 29 Node* receiver = Parameter(0); | |
| 30 Node* value = Parameter(1); | |
| 31 Node* context = Parameter(4); | |
| 32 Node* closed = SmiConstant(JSGeneratorObject::kGeneratorClosed); | |
| 33 | |
| 34 // Check if the {receiver} is actually a JSGeneratorObject. | |
| 35 Label if_receiverisincompatible(this, Label::kDeferred); | |
| 36 GotoIf(TaggedIsSmi(receiver), &if_receiverisincompatible); | |
| 37 Node* receiver_instance_type = LoadInstanceType(receiver); | |
| 38 GotoIfNot(Word32Equal(receiver_instance_type, | |
| 39 Int32Constant(JS_GENERATOR_OBJECT_TYPE)), | |
| 40 &if_receiverisincompatible); | |
| 41 | |
| 42 // Check if the {receiver} is running or already closed. | |
| 43 Node* receiver_continuation = | |
| 44 LoadObjectField(receiver, JSGeneratorObject::kContinuationOffset); | |
| 45 Label if_receiverisclosed(this, Label::kDeferred), | |
| 46 if_receiverisrunning(this, Label::kDeferred); | |
| 47 GotoIf(SmiEqual(receiver_continuation, closed), &if_receiverisclosed); | |
| 48 DCHECK_LT(JSGeneratorObject::kGeneratorExecuting, | |
| 49 JSGeneratorObject::kGeneratorClosed); | |
| 50 GotoIf(SmiLessThan(receiver_continuation, closed), &if_receiverisrunning); | |
| 51 | |
| 52 // Resume the {receiver} using our trampoline. | |
| 53 Node* result = CallStub(CodeFactory::ResumeGenerator(isolate()), context, | |
| 54 value, receiver, SmiConstant(resume_mode)); | |
| 55 Return(result); | |
| 56 | |
| 57 Bind(&if_receiverisincompatible); | |
| 58 { | |
| 59 // The {receiver} is not a valid JSGeneratorObject. | |
| 60 CallRuntime(Runtime::kThrowIncompatibleMethodReceiver, context, | |
| 61 HeapConstant( | |
| 62 factory()->NewStringFromAsciiChecked(method_name, TENURED)), | |
| 63 receiver); | |
| 64 Unreachable(); | |
| 65 } | |
| 66 | |
| 67 Bind(&if_receiverisclosed); | |
| 68 { | |
| 69 Callable create_iter_result_object = | |
| 70 CodeFactory::CreateIterResultObject(isolate()); | |
| 71 | |
| 72 // The {receiver} is closed already. | |
| 73 Node* result = nullptr; | |
| 74 switch (resume_mode) { | |
| 75 case JSGeneratorObject::kNext: | |
| 76 result = CallStub(create_iter_result_object, context, | |
| 77 UndefinedConstant(), TrueConstant()); | |
| 78 break; | |
| 79 case JSGeneratorObject::kReturn: | |
| 80 result = | |
| 81 CallStub(create_iter_result_object, context, value, TrueConstant()); | |
| 82 break; | |
| 83 case JSGeneratorObject::kThrow: | |
| 84 result = CallRuntime(Runtime::kThrow, context, value); | |
| 85 break; | |
| 86 } | |
| 87 Return(result); | |
| 88 } | |
| 89 | |
| 90 Bind(&if_receiverisrunning); | |
| 91 { | |
| 92 CallRuntime(Runtime::kThrowGeneratorRunning, context); | |
| 93 Unreachable(); | |
| 94 } | |
| 95 } | |
| 96 | |
| 97 // ES6 section 25.3.1.2 Generator.prototype.next ( value ) | |
| 98 TF_BUILTIN(GeneratorPrototypeNext, GeneratorBuiltinsAssembler) { | |
| 99 GeneratorPrototypeResume(JSGeneratorObject::kNext, | |
| 100 "[Generator].prototype.next"); | |
| 101 } | |
| 102 | |
| 103 // ES6 section 25.3.1.3 Generator.prototype.return ( value ) | |
| 104 TF_BUILTIN(GeneratorPrototypeReturn, GeneratorBuiltinsAssembler) { | |
| 105 GeneratorPrototypeResume(JSGeneratorObject::kReturn, | |
| 106 "[Generator].prototype.return"); | |
| 107 } | |
| 108 | |
| 109 // ES6 section 25.3.1.4 Generator.prototype.throw ( exception ) | |
| 110 TF_BUILTIN(GeneratorPrototypeThrow, GeneratorBuiltinsAssembler) { | |
| 111 GeneratorPrototypeResume(JSGeneratorObject::kThrow, | |
| 112 "[Generator].prototype.throw"); | |
| 113 } | |
| 114 | |
| 115 } // namespace internal | |
| 116 } // namespace v8 | |
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Chromium Code Reviews
Issue 2752143004:
[refactor] Separate generated builtins and C++ builtins into separate files (Closed)
