155099 2016-03-06 16:04:58 -0800 [ES6] Implement Proxy.[[GetPrototypeOf]] 2016-03-07 15:28:31 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 saam saam benjamin commit-queue fpizlo ggaren gskachkov keith_miller mark.lam msaboff oliver sukolsak ysuzuki oldest_to_newest 1171479 0 saam 2016-03-06 16:04:58 -0800 ... 1171733 1 273207 saam 2016-03-07 13:53:31 -0800 Created attachment 273207 patch 1171735 2 commit-queue 2016-03-07 13:55:37 -0800 Attachment 273207 did not pass style-queue: ERROR: Source/JavaScriptCore/runtime/ProxyObject.cpp:1051: Multi line control clauses should use braces. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/runtime/ProxyObject.cpp:1053: Weird number of spaces at line-start. Are you using a 4-space indent? [whitespace/indent] [3] Total errors found: 2 in 5 files If any of these errors are false positives, please file a bug against check-webkit-style. 1171742 3 273207 mark.lam 2016-03-07 14:11:03 -0800 Comment on attachment 273207 patch View in context: https://bugs.webkit.org/attachment.cgi?id=273207&action=review > Source/JavaScriptCore/runtime/ProxyObject.cpp:1035 > + if (handlerValue.isNull()) { > + throwVMTypeError(exec, ASCIILiteral("Proxy 'handler' is null. It should be an Object.")); > + return JSValue(); > + } The only way to get to performGetPrototype() is thru performProxyGet(). The only way to get to performProxyGet() is thru ProxyObject::getOwnPropertySlotCommon() returning a slot getter. And ProxyObject::getOwnPropertySlotCommon() can only be called on a ProxyObject. Hence, shouldn't this be an assert instead? 1171748 4 273207 mark.lam 2016-03-07 14:21:00 -0800 Comment on attachment 273207 patch View in context: https://bugs.webkit.org/attachment.cgi?id=273207&action=review >> Source/JavaScriptCore/runtime/ProxyObject.cpp:1035 >> + } > > The only way to get to performGetPrototype() is thru performProxyGet(). The only way to get to performProxyGet() is thru ProxyObject::getOwnPropertySlotCommon() returning a slot getter. And ProxyObject::getOwnPropertySlotCommon() can only be called on a ProxyObject. Hence, shouldn't this be an assert instead? My mistake. I didn't see the call from ProxyObject::getPrototype() below. 1171751 5 saam 2016-03-07 14:24:21 -0800 I spoke with Mark in person. For posterity: calls to "proxy.__proto__" will route through performProxyGet. Reflect/Object.getOwnPrototype will call straight through to the method table implementation which calls through to performProxyGet(.). 1171767 6 273207 mark.lam 2016-03-07 14:51:21 -0800 Comment on attachment 273207 patch r=me 1171805 7 saam 2016-03-07 15:28:31 -0800 thanks for the review. Landed in: http://trac.webkit.org/changeset/197711 273207 2016-03-07 13:53:31 -0800 2016-03-07 14:51:21 -0800 patch a-backup.diff text/plain 17824 saam SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gMTk3NzA0KQorKysgU291cmNl L0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDM2IEBA CisyMDE2LTAzLTA3ICBTYWFtIGJhcmF0aSAgPHNiYXJhdGlAYXBwbGUuY29tPgorCisgICAgICAg IFtFUzZdIEltcGxlbWVudCBQcm94eS5bW0dldFByb3RvdHlwZU9mXV0KKyAgICAgICAgaHR0cHM6 Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTE1NTA5OQorCisgICAgICAgIFJldmll d2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIFRoaXMgcGF0Y2ggaXMgYSBzdHJhaWdo dCBmb3J3YXJkIGltcGxlbWVudGF0aW9uIG9mIFByb3h5LltbR2V0UHJvdG90eXBlT2ZdXQorICAg ICAgICB3aXRoIHJlc3BlY3QgdG8gc2VjdGlvbiA5LjUuMSBvZiB0aGUgRUNNQVNjcmlwdCBzcGVj LgorICAgICAgICBodHRwczovL3RjMzkuZ2l0aHViLmlvL2VjbWEyNjIvI3NlYy1wcm94eS1vYmpl 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