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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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509 // Wrappers for scripts are kept alive and cached in weak global | 509 // Wrappers for scripts are kept alive and cached in weak global |
510 // handles referred from foreign objects held by the scripts as long as | 510 // handles referred from foreign objects held by the scripts as long as |
511 // they are used. When they are not used anymore, the garbage | 511 // they are used. When they are not used anymore, the garbage |
512 // collector will call the weak callback on the global handle | 512 // collector will call the weak callback on the global handle |
513 // associated with the wrapper and get rid of both the wrapper and the | 513 // associated with the wrapper and get rid of both the wrapper and the |
514 // handle. | 514 // handle. |
515 static void ClearWrapperCache(Persistent<v8::Value> handle, void*) { | 515 static void ClearWrapperCache(Persistent<v8::Value> handle, void*) { |
516 Handle<Object> cache = Utils::OpenHandle(*handle); | 516 Handle<Object> cache = Utils::OpenHandle(*handle); |
517 JSValue* wrapper = JSValue::cast(*cache); | 517 JSValue* wrapper = JSValue::cast(*cache); |
518 Foreign* foreign = Script::cast(wrapper->value())->wrapper(); | 518 Foreign* foreign = Script::cast(wrapper->value())->wrapper(); |
519 ASSERT(foreign->address() == reinterpret_cast<Address>(cache.location())); | 519 ASSERT(foreign->foreign_address() == |
520 foreign->set_address(0); | 520 reinterpret_cast<Address>(cache.location())); |
| 521 foreign->set_foreign_address(0); |
521 Isolate* isolate = Isolate::Current(); | 522 Isolate* isolate = Isolate::Current(); |
522 isolate->global_handles()->Destroy(cache.location()); | 523 isolate->global_handles()->Destroy(cache.location()); |
523 isolate->counters()->script_wrappers()->Decrement(); | 524 isolate->counters()->script_wrappers()->Decrement(); |
524 } | 525 } |
525 | 526 |
526 | 527 |
527 Handle<JSValue> GetScriptWrapper(Handle<Script> script) { | 528 Handle<JSValue> GetScriptWrapper(Handle<Script> script) { |
528 if (script->wrapper()->address() != NULL) { | 529 if (script->wrapper()->foreign_address() != NULL) { |
529 // Return the script wrapper directly from the cache. | 530 // Return the script wrapper directly from the cache. |
530 return Handle<JSValue>( | 531 return Handle<JSValue>( |
531 reinterpret_cast<JSValue**>(script->wrapper()->address())); | 532 reinterpret_cast<JSValue**>(script->wrapper()->foreign_address())); |
532 } | 533 } |
533 Isolate* isolate = Isolate::Current(); | 534 Isolate* isolate = Isolate::Current(); |
534 // Construct a new script wrapper. | 535 // Construct a new script wrapper. |
535 isolate->counters()->script_wrappers()->Increment(); | 536 isolate->counters()->script_wrappers()->Increment(); |
536 Handle<JSFunction> constructor = isolate->script_function(); | 537 Handle<JSFunction> constructor = isolate->script_function(); |
537 Handle<JSValue> result = | 538 Handle<JSValue> result = |
538 Handle<JSValue>::cast(isolate->factory()->NewJSObject(constructor)); | 539 Handle<JSValue>::cast(isolate->factory()->NewJSObject(constructor)); |
539 result->set_value(*script); | 540 result->set_value(*script); |
540 | 541 |
541 // Create a new weak global handle and use it to cache the wrapper | 542 // Create a new weak global handle and use it to cache the wrapper |
542 // for future use. The cache will automatically be cleared by the | 543 // for future use. The cache will automatically be cleared by the |
543 // garbage collector when it is not used anymore. | 544 // garbage collector when it is not used anymore. |
544 Handle<Object> handle = isolate->global_handles()->Create(*result); | 545 Handle<Object> handle = isolate->global_handles()->Create(*result); |
545 isolate->global_handles()->MakeWeak(handle.location(), NULL, | 546 isolate->global_handles()->MakeWeak(handle.location(), NULL, |
546 &ClearWrapperCache); | 547 &ClearWrapperCache); |
547 script->wrapper()->set_address(reinterpret_cast<Address>(handle.location())); | 548 script->wrapper()->set_foreign_address( |
| 549 reinterpret_cast<Address>(handle.location())); |
548 return result; | 550 return result; |
549 } | 551 } |
550 | 552 |
551 | 553 |
552 // Init line_ends array with code positions of line ends inside script | 554 // Init line_ends array with code positions of line ends inside script |
553 // source. | 555 // source. |
554 void InitScriptLineEnds(Handle<Script> script) { | 556 void InitScriptLineEnds(Handle<Script> script) { |
555 if (!script->line_ends()->IsUndefined()) return; | 557 if (!script->line_ends()->IsUndefined()) return; |
556 | 558 |
557 Isolate* isolate = script->GetIsolate(); | 559 Isolate* isolate = script->GetIsolate(); |
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910 Handle<ObjectHashTable> PutIntoObjectHashTable(Handle<ObjectHashTable> table, | 912 Handle<ObjectHashTable> PutIntoObjectHashTable(Handle<ObjectHashTable> table, |
911 Handle<Object> key, | 913 Handle<Object> key, |
912 Handle<Object> value) { | 914 Handle<Object> value) { |
913 CALL_HEAP_FUNCTION(table->GetIsolate(), | 915 CALL_HEAP_FUNCTION(table->GetIsolate(), |
914 table->Put(*key, *value), | 916 table->Put(*key, *value), |
915 ObjectHashTable); | 917 ObjectHashTable); |
916 } | 918 } |
917 | 919 |
918 | 920 |
919 } } // namespace v8::internal | 921 } } // namespace v8::internal |
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