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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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| 192 isolate->counters()->array_function_runtime()->Increment(); | 192 isolate->counters()->array_function_runtime()->Increment(); |
| 193 | 193 |
| 194 JSArray* array; | 194 JSArray* array; |
| 195 if (CalledAsConstructor(isolate)) { | 195 if (CalledAsConstructor(isolate)) { |
| 196 array = JSArray::cast((*args)[0]); | 196 array = JSArray::cast((*args)[0]); |
| 197 // Initialize elements and length in case later allocations fail so that the | 197 // Initialize elements and length in case later allocations fail so that the |
| 198 // array object is initialized in a valid state. | 198 // array object is initialized in a valid state. |
| 199 array->set_length(Smi::FromInt(0)); | 199 array->set_length(Smi::FromInt(0)); |
| 200 array->set_elements(heap->empty_fixed_array()); | 200 array->set_elements(heap->empty_fixed_array()); |
| 201 if (!FLAG_smi_only_arrays) { | 201 if (!FLAG_smi_only_arrays) { |
| 202 Context* global_context = isolate->context()->global_context(); | 202 Context* native_context = isolate->context()->native_context(); |
| 203 if (array->GetElementsKind() == GetInitialFastElementsKind() && | 203 if (array->GetElementsKind() == GetInitialFastElementsKind() && |
| 204 !global_context->js_array_maps()->IsUndefined()) { | 204 !native_context->js_array_maps()->IsUndefined()) { |
| 205 FixedArray* map_array = | 205 FixedArray* map_array = |
| 206 FixedArray::cast(global_context->js_array_maps()); | 206 FixedArray::cast(native_context->js_array_maps()); |
| 207 array->set_map(Map::cast(map_array-> | 207 array->set_map(Map::cast(map_array-> |
| 208 get(TERMINAL_FAST_ELEMENTS_KIND))); | 208 get(TERMINAL_FAST_ELEMENTS_KIND))); |
| 209 } | 209 } |
| 210 } | 210 } |
| 211 } else { | 211 } else { |
| 212 // Allocate the JS Array | 212 // Allocate the JS Array |
| 213 MaybeObject* maybe_obj = heap->AllocateJSObject(constructor); | 213 MaybeObject* maybe_obj = heap->AllocateJSObject(constructor); |
| 214 if (!maybe_obj->To(&array)) return maybe_obj; | 214 if (!maybe_obj->To(&array)) return maybe_obj; |
| 215 } | 215 } |
| 216 | 216 |
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| 305 array->set_elements(elms); | 305 array->set_elements(elms); |
| 306 array->set_length(Smi::FromInt(number_of_elements)); | 306 array->set_length(Smi::FromInt(number_of_elements)); |
| 307 return array; | 307 return array; |
| 308 } | 308 } |
| 309 | 309 |
| 310 | 310 |
| 311 BUILTIN(InternalArrayCodeGeneric) { | 311 BUILTIN(InternalArrayCodeGeneric) { |
| 312 return ArrayCodeGenericCommon( | 312 return ArrayCodeGenericCommon( |
| 313 &args, | 313 &args, |
| 314 isolate, | 314 isolate, |
| 315 isolate->context()->global_context()->internal_array_function()); | 315 isolate->context()->native_context()->internal_array_function()); |
| 316 } | 316 } |
| 317 | 317 |
| 318 | 318 |
| 319 BUILTIN(ArrayCodeGeneric) { | 319 BUILTIN(ArrayCodeGeneric) { |
| 320 return ArrayCodeGenericCommon( | 320 return ArrayCodeGenericCommon( |
| 321 &args, | 321 &args, |
| 322 isolate, | 322 isolate, |
| 323 isolate->context()->global_context()->array_function()); | 323 isolate->context()->native_context()->array_function()); |
| 324 } | 324 } |
| 325 | 325 |
| 326 | 326 |
| 327 static void MoveElements(Heap* heap, | 327 static void MoveElements(Heap* heap, |
| 328 AssertNoAllocation* no_gc, | 328 AssertNoAllocation* no_gc, |
| 329 FixedArray* dst, | 329 FixedArray* dst, |
| 330 int dst_index, | 330 int dst_index, |
| 331 FixedArray* src, | 331 FixedArray* src, |
| 332 int src_index, | 332 int src_index, |
| 333 int len) { | 333 int len) { |
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| 395 } | 395 } |
| 396 | 396 |
| 397 HEAP_PROFILE(heap, ObjectMoveEvent(elms->address(), | 397 HEAP_PROFILE(heap, ObjectMoveEvent(elms->address(), |
| 398 elms->address() + size_delta)); | 398 elms->address() + size_delta)); |
| 399 return FixedArray::cast(HeapObject::FromAddress( | 399 return FixedArray::cast(HeapObject::FromAddress( |
| 400 elms->address() + to_trim * kPointerSize)); | 400 elms->address() + to_trim * kPointerSize)); |
| 401 } | 401 } |
| 402 | 402 |
| 403 | 403 |
| 404 static bool ArrayPrototypeHasNoElements(Heap* heap, | 404 static bool ArrayPrototypeHasNoElements(Heap* heap, |
| 405 Context* global_context, | 405 Context* native_context, |
| 406 JSObject* array_proto) { | 406 JSObject* array_proto) { |
| 407 // This method depends on non writability of Object and Array prototype | 407 // This method depends on non writability of Object and Array prototype |
| 408 // fields. | 408 // fields. |
| 409 if (array_proto->elements() != heap->empty_fixed_array()) return false; | 409 if (array_proto->elements() != heap->empty_fixed_array()) return false; |
| 410 // Object.prototype | 410 // Object.prototype |
| 411 Object* proto = array_proto->GetPrototype(); | 411 Object* proto = array_proto->GetPrototype(); |
| 412 if (proto == heap->null_value()) return false; | 412 if (proto == heap->null_value()) return false; |
| 413 array_proto = JSObject::cast(proto); | 413 array_proto = JSObject::cast(proto); |
| 414 if (array_proto != global_context->initial_object_prototype()) return false; | 414 if (array_proto != native_context->initial_object_prototype()) return false; |
| 415 if (array_proto->elements() != heap->empty_fixed_array()) return false; | 415 if (array_proto->elements() != heap->empty_fixed_array()) return false; |
| 416 return array_proto->GetPrototype()->IsNull(); | 416 return array_proto->GetPrototype()->IsNull(); |
| 417 } | 417 } |
| 418 | 418 |
| 419 | 419 |
| 420 MUST_USE_RESULT | 420 MUST_USE_RESULT |
| 421 static inline MaybeObject* EnsureJSArrayWithWritableFastElements( | 421 static inline MaybeObject* EnsureJSArrayWithWritableFastElements( |
| 422 Heap* heap, Object* receiver, Arguments* args, int first_added_arg) { | 422 Heap* heap, Object* receiver, Arguments* args, int first_added_arg) { |
| 423 if (!receiver->IsJSArray()) return NULL; | 423 if (!receiver->IsJSArray()) return NULL; |
| 424 JSArray* array = JSArray::cast(receiver); | 424 JSArray* array = JSArray::cast(receiver); |
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| 454 args_length - first_added_arg, | 454 args_length - first_added_arg, |
| 455 DONT_ALLOW_DOUBLE_ELEMENTS); | 455 DONT_ALLOW_DOUBLE_ELEMENTS); |
| 456 if (maybe_array->IsFailure()) return maybe_array; | 456 if (maybe_array->IsFailure()) return maybe_array; |
| 457 return array->elements(); | 457 return array->elements(); |
| 458 } | 458 } |
| 459 | 459 |
| 460 | 460 |
| 461 static inline bool IsJSArrayFastElementMovingAllowed(Heap* heap, | 461 static inline bool IsJSArrayFastElementMovingAllowed(Heap* heap, |
| 462 JSArray* receiver) { | 462 JSArray* receiver) { |
| 463 if (!FLAG_clever_optimizations) return false; | 463 if (!FLAG_clever_optimizations) return false; |
| 464 Context* global_context = heap->isolate()->context()->global_context(); | 464 Context* native_context = heap->isolate()->context()->native_context(); |
| 465 JSObject* array_proto = | 465 JSObject* array_proto = |
| 466 JSObject::cast(global_context->array_function()->prototype()); | 466 JSObject::cast(native_context->array_function()->prototype()); |
| 467 return receiver->GetPrototype() == array_proto && | 467 return receiver->GetPrototype() == array_proto && |
| 468 ArrayPrototypeHasNoElements(heap, global_context, array_proto); | 468 ArrayPrototypeHasNoElements(heap, native_context, array_proto); |
| 469 } | 469 } |
| 470 | 470 |
| 471 | 471 |
| 472 MUST_USE_RESULT static MaybeObject* CallJsBuiltin( | 472 MUST_USE_RESULT static MaybeObject* CallJsBuiltin( |
| 473 Isolate* isolate, | 473 Isolate* isolate, |
| 474 const char* name, | 474 const char* name, |
| 475 BuiltinArguments<NO_EXTRA_ARGUMENTS> args) { | 475 BuiltinArguments<NO_EXTRA_ARGUMENTS> args) { |
| 476 HandleScope handleScope(isolate); | 476 HandleScope handleScope(isolate); |
| 477 | 477 |
| 478 Handle<Object> js_builtin = | 478 Handle<Object> js_builtin = |
| 479 GetProperty(Handle<JSObject>(isolate->global_context()->builtins()), | 479 GetProperty(Handle<JSObject>(isolate->native_context()->builtins()), |
| 480 name); | 480 name); |
| 481 Handle<JSFunction> function = Handle<JSFunction>::cast(js_builtin); | 481 Handle<JSFunction> function = Handle<JSFunction>::cast(js_builtin); |
| 482 int argc = args.length() - 1; | 482 int argc = args.length() - 1; |
| 483 ScopedVector<Handle<Object> > argv(argc); | 483 ScopedVector<Handle<Object> > argv(argc); |
| 484 for (int i = 0; i < argc; ++i) { | 484 for (int i = 0; i < argc; ++i) { |
| 485 argv[i] = args.at<Object>(i + 1); | 485 argv[i] = args.at<Object>(i + 1); |
| 486 } | 486 } |
| 487 bool pending_exception; | 487 bool pending_exception; |
| 488 Handle<Object> result = Execution::Call(function, | 488 Handle<Object> result = Execution::Call(function, |
| 489 args.receiver(), | 489 args.receiver(), |
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| 699 !IsJSArrayFastElementMovingAllowed(heap, array)) { | 699 !IsJSArrayFastElementMovingAllowed(heap, array)) { |
| 700 return CallJsBuiltin(isolate, "ArraySlice", args); | 700 return CallJsBuiltin(isolate, "ArraySlice", args); |
| 701 } | 701 } |
| 702 | 702 |
| 703 elms = FixedArray::cast(array->elements()); | 703 elms = FixedArray::cast(array->elements()); |
| 704 len = Smi::cast(array->length())->value(); | 704 len = Smi::cast(array->length())->value(); |
| 705 } else { | 705 } else { |
| 706 // Array.slice(arguments, ...) is quite a common idiom (notably more | 706 // Array.slice(arguments, ...) is quite a common idiom (notably more |
| 707 // than 50% of invocations in Web apps). Treat it in C++ as well. | 707 // than 50% of invocations in Web apps). Treat it in C++ as well. |
| 708 Map* arguments_map = | 708 Map* arguments_map = |
| 709 isolate->context()->global_context()->arguments_boilerplate()->map(); | 709 isolate->context()->native_context()->arguments_boilerplate()->map(); |
| 710 | 710 |
| 711 bool is_arguments_object_with_fast_elements = | 711 bool is_arguments_object_with_fast_elements = |
| 712 receiver->IsJSObject() | 712 receiver->IsJSObject() |
| 713 && JSObject::cast(receiver)->map() == arguments_map | 713 && JSObject::cast(receiver)->map() == arguments_map |
| 714 && JSObject::cast(receiver)->HasFastSmiOrObjectElements(); | 714 && JSObject::cast(receiver)->HasFastSmiOrObjectElements(); |
| 715 if (!is_arguments_object_with_fast_elements) { | 715 if (!is_arguments_object_with_fast_elements) { |
| 716 return CallJsBuiltin(isolate, "ArraySlice", args); | 716 return CallJsBuiltin(isolate, "ArraySlice", args); |
| 717 } | 717 } |
| 718 elms = FixedArray::cast(JSObject::cast(receiver)->elements()); | 718 elms = FixedArray::cast(JSObject::cast(receiver)->elements()); |
| 719 Object* len_obj = JSObject::cast(receiver) | 719 Object* len_obj = JSObject::cast(receiver) |
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| 936 | 936 |
| 937 // Set the length. | 937 // Set the length. |
| 938 array->set_length(Smi::FromInt(new_length)); | 938 array->set_length(Smi::FromInt(new_length)); |
| 939 | 939 |
| 940 return result_array; | 940 return result_array; |
| 941 } | 941 } |
| 942 | 942 |
| 943 | 943 |
| 944 BUILTIN(ArrayConcat) { | 944 BUILTIN(ArrayConcat) { |
| 945 Heap* heap = isolate->heap(); | 945 Heap* heap = isolate->heap(); |
| 946 Context* global_context = isolate->context()->global_context(); | 946 Context* native_context = isolate->context()->native_context(); |
| 947 JSObject* array_proto = | 947 JSObject* array_proto = |
| 948 JSObject::cast(global_context->array_function()->prototype()); | 948 JSObject::cast(native_context->array_function()->prototype()); |
| 949 if (!ArrayPrototypeHasNoElements(heap, global_context, array_proto)) { | 949 if (!ArrayPrototypeHasNoElements(heap, native_context, array_proto)) { |
| 950 return CallJsBuiltin(isolate, "ArrayConcat", args); | 950 return CallJsBuiltin(isolate, "ArrayConcat", args); |
| 951 } | 951 } |
| 952 | 952 |
| 953 // Iterate through all the arguments performing checks | 953 // Iterate through all the arguments performing checks |
| 954 // and calculating total length. | 954 // and calculating total length. |
| 955 int n_arguments = args.length(); | 955 int n_arguments = args.length(); |
| 956 int result_len = 0; | 956 int result_len = 0; |
| 957 ElementsKind elements_kind = GetInitialFastElementsKind(); | 957 ElementsKind elements_kind = GetInitialFastElementsKind(); |
| 958 for (int i = 0; i < n_arguments; i++) { | 958 for (int i = 0; i < n_arguments; i++) { |
| 959 Object* arg = args[i]; | 959 Object* arg = args[i]; |
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| 1703 return Handle<Code>(code_address); \ | 1703 return Handle<Code>(code_address); \ |
| 1704 } | 1704 } |
| 1705 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C) | 1705 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C) |
| 1706 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A) | 1706 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A) |
| 1707 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A) | 1707 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A) |
| 1708 #undef DEFINE_BUILTIN_ACCESSOR_C | 1708 #undef DEFINE_BUILTIN_ACCESSOR_C |
| 1709 #undef DEFINE_BUILTIN_ACCESSOR_A | 1709 #undef DEFINE_BUILTIN_ACCESSOR_A |
| 1710 | 1710 |
| 1711 | 1711 |
| 1712 } } // namespace v8::internal | 1712 } } // namespace v8::internal |
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