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| 1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 219 | 219 |
| 220 | 220 |
| 221 Handle<Object> Execution::GetFunctionDelegate(Handle<Object> object) { | 221 Handle<Object> Execution::GetFunctionDelegate(Handle<Object> object) { |
| 222 ASSERT(!object->IsJSFunction()); | 222 ASSERT(!object->IsJSFunction()); |
| 223 Isolate* isolate = Isolate::Current(); | 223 Isolate* isolate = Isolate::Current(); |
| 224 Factory* factory = isolate->factory(); | 224 Factory* factory = isolate->factory(); |
| 225 | 225 |
| 226 // If you return a function from here, it will be called when an | 226 // If you return a function from here, it will be called when an |
| 227 // attempt is made to call the given object as a function. | 227 // attempt is made to call the given object as a function. |
| 228 | 228 |
| 229 // If object is a function proxies, get its handler. Iterate if necessary. | 229 // If object is a function proxy, get its handler. Iterate if necessary. |
| 230 Object* fun = *object; | 230 Object* fun = *object; |
| 231 while (fun->IsJSFunctionProxy()) { | 231 while (fun->IsJSFunctionProxy()) { |
| 232 fun = JSFunctionProxy::cast(fun)->call_trap(); | 232 fun = JSFunctionProxy::cast(fun)->call_trap(); |
| 233 } | 233 } |
| 234 if (fun->IsJSFunction()) return Handle<Object>(fun); | 234 if (fun->IsJSFunction()) return Handle<Object>(fun); |
| 235 | 235 |
| 236 // Objects created through the API can have an instance-call handler | 236 // Objects created through the API can have an instance-call handler |
| 237 // that should be used when calling the object as a function. | 237 // that should be used when calling the object as a function. |
| 238 if (fun->IsHeapObject() && | 238 if (fun->IsHeapObject() && |
| 239 HeapObject::cast(fun)->map()->has_instance_call_handler()) { | 239 HeapObject::cast(fun)->map()->has_instance_call_handler()) { |
| 240 return Handle<JSFunction>( | 240 return Handle<JSFunction>( |
| 241 isolate->global_context()->call_as_function_delegate()); | 241 isolate->global_context()->call_as_function_delegate()); |
| 242 } | 242 } |
| 243 | 243 |
| 244 return factory->undefined_value(); | 244 return factory->undefined_value(); |
| 245 } | 245 } |
| 246 | 246 |
| 247 | 247 |
| 248 Handle<Object> Execution::TryGetFunctionDelegate(Handle<Object> object, | 248 Handle<Object> Execution::TryGetFunctionDelegate(Handle<Object> object, |
| 249 bool* has_pending_exception) { | 249 bool* has_pending_exception) { |
| 250 ASSERT(!object->IsJSFunction()); | 250 ASSERT(!object->IsJSFunction()); |
| 251 Isolate* isolate = Isolate::Current(); | 251 Isolate* isolate = Isolate::Current(); |
| 252 | 252 |
| 253 // If object is a function proxies, get its handler. Iterate if necessary. | 253 // If object is a function proxy, get its handler. Iterate if necessary. |
| 254 Object* fun = *object; | 254 Object* fun = *object; |
| 255 while (fun->IsJSFunctionProxy()) { | 255 while (fun->IsJSFunctionProxy()) { |
| 256 fun = JSFunctionProxy::cast(fun)->call_trap(); | 256 fun = JSFunctionProxy::cast(fun)->call_trap(); |
| 257 } | 257 } |
| 258 if (fun->IsJSFunction()) return Handle<Object>(fun); | 258 if (fun->IsJSFunction()) return Handle<Object>(fun); |
| 259 | 259 |
| 260 // Objects created through the API can have an instance-call handler | 260 // Objects created through the API can have an instance-call handler |
| 261 // that should be used when calling the object as a function. | 261 // that should be used when calling the object as a function. |
| 262 if (fun->IsHeapObject() && | 262 if (fun->IsHeapObject() && |
| 263 HeapObject::cast(fun)->map()->has_instance_call_handler()) { | 263 HeapObject::cast(fun)->map()->has_instance_call_handler()) { |
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| 868 return isolate->TerminateExecution(); | 868 return isolate->TerminateExecution(); |
| 869 } | 869 } |
| 870 if (stack_guard->IsInterrupted()) { | 870 if (stack_guard->IsInterrupted()) { |
| 871 stack_guard->Continue(INTERRUPT); | 871 stack_guard->Continue(INTERRUPT); |
| 872 return isolate->StackOverflow(); | 872 return isolate->StackOverflow(); |
| 873 } | 873 } |
| 874 return isolate->heap()->undefined_value(); | 874 return isolate->heap()->undefined_value(); |
| 875 } | 875 } |
| 876 | 876 |
| 877 } } // namespace v8::internal | 877 } } // namespace v8::internal |
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