1 // Copyright 2014 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/runtime/runtime-utils.h" 6 7 #include "src/arguments.h" 8 #include "src/factory.h" 9 #include "src/frames-inl.h" 10 #include "src/objects-inl.h" 11 12 namespace v8 { 13 namespace internal { 14 15 RUNTIME_FUNCTION(Runtime_CreateJSGeneratorObject) { 16 HandleScope scope(isolate); 17 DCHECK_EQ(2, args.length()); 18 CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0); 19 CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 1); 20 CHECK(IsResumableFunction(function->shared()->kind())); 21 22 // Underlying function needs to have bytecode available. 23 DCHECK(function->shared()->HasBytecodeArray()); 24 DCHECK(!function->shared()->HasBaselineCode()); 25 int size = function->shared()->bytecode_array()->register_count(); 26 Handle<FixedArray> register_file = isolate->factory()->NewFixedArray(size); 27 28 Handle<JSGeneratorObject> generator = 29 isolate->factory()->NewJSGeneratorObject(function); 30 generator->set_function(*function); 31 generator->set_context(isolate->context()); 32 generator->set_receiver(*receiver); 33 generator->set_register_file(*register_file); 34 generator->set_continuation(JSGeneratorObject::kGeneratorExecuting); 35 return *generator; 36 } 37 38 RUNTIME_FUNCTION(Runtime_GeneratorClose) { 39 HandleScope scope(isolate); 40 DCHECK_EQ(1, args.length()); 41 CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0); 42 43 generator->set_continuation(JSGeneratorObject::kGeneratorClosed); 44 45 return isolate->heap()->undefined_value(); 46 } 47 48 RUNTIME_FUNCTION(Runtime_GeneratorGetFunction) { 49 HandleScope scope(isolate); 50 DCHECK_EQ(1, args.length()); 51 CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0); 52 53 return generator->function(); 54 } 55 56 RUNTIME_FUNCTION(Runtime_GeneratorGetReceiver) { 57 HandleScope scope(isolate); 58 DCHECK_EQ(1, args.length()); 59 CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0); 60 61 return generator->receiver(); 62 } 63 64 RUNTIME_FUNCTION(Runtime_GeneratorGetContext) { 65 HandleScope scope(isolate); 66 DCHECK_EQ(1, args.length()); 67 CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0); 68 69 return generator->context(); 70 } 71 72 RUNTIME_FUNCTION(Runtime_GeneratorGetInputOrDebugPos) { 73 HandleScope scope(isolate); 74 DCHECK_EQ(1, args.length()); 75 CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0); 76 77 return generator->input_or_debug_pos(); 78 } 79 80 RUNTIME_FUNCTION(Runtime_GeneratorGetResumeMode) { 81 HandleScope scope(isolate); 82 DCHECK_EQ(1, args.length()); 83 CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0); 84 85 return Smi::FromInt(generator->resume_mode()); 86 } 87 88 RUNTIME_FUNCTION(Runtime_GeneratorGetContinuation) { 89 HandleScope scope(isolate); 90 DCHECK_EQ(1, args.length()); 91 CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0); 92 93 return Smi::FromInt(generator->continuation()); 94 } 95 96 RUNTIME_FUNCTION(Runtime_GeneratorGetSourcePosition) { 97 HandleScope scope(isolate); 98 DCHECK_EQ(1, args.length()); 99 CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0); 100 101 if (!generator->is_suspended()) return isolate->heap()->undefined_value(); 102 return Smi::FromInt(generator->source_position()); 103 } 104 105 } // namespace internal 106 } // namespace v8 107
