168578 2017-02-19 17:14:32 -0800 [Cocoa] Objective-C class whose name begins with an underscore can’t be exported to JavaScript 2017-06-14 22:57:41 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Local Build Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 mitz mitz barraclough buildbot commit-queue ggaren keith_miller mark.lam msaboff saam oldest_to_newest 1278787 0 mitz 2017-02-19 17:14:32 -0800 When an Objective-C class’s name begins with an underscore, its conformance to JSExport is ignored. This is because -[JSWrapperMap classInfoForClass:] skips over classes whose names begin with an underscore. A comment in that method says that it skips “internal classes beginning with '_'” but offers no explanation why. A possible explanation is that this behavior does make instances of class clusters appear somewhat “nicer” when exported to JavaScript. In framework code (including WebKit code), it is common for class names that aren’t part of the public API to being with an underscore, and such classes may have JS exports that they don’t share with a non-underscore-prefixed superclass. 1297844 1 307253 mitz 2017-04-16 19:46:15 -0700 Created attachment 307253 Avoid skipping over underscore-prefixed classes that JSExport 1297908 2 307253 mitz 2017-04-17 08:01:39 -0700 Comment on attachment 307253 Avoid skipping over underscore-prefixed classes that JSExport The more I think about this, the more it seems like the right thing to do here is just entirely remove the special-casing of underscore-prefixed class names. 1298041 3 307253 ggaren 2017-04-17 15:04:36 -0700 Comment on attachment 307253 Avoid skipping over underscore-prefixed classes that JSExport I wonder what we accomplished previously be excluding classes with _ prefixes, and what we continue to accomplish now by doing the same for classes with _ prefixes that do not have JSExports. Such classes don't export anything, so how are they even visible to JavaScript? I guess they are visible when an empty _Class shows up somewhere in the prototype chain? 1319459 4 307253 commit-queue 2017-06-14 22:45:24 -0700 Comment on attachment 307253 Avoid skipping over underscore-prefixed classes that JSExport Rejecting attachment 307253 from commit-queue. Failed to run "['/Volumes/Data/EWS/WebKit/Tools/Scripts/webkit-patch', '--status-host=webkit-queues.webkit.org', '--bot-id=webkit-cq-03', 'apply-attachment', '--no-update', '--non-interactive', 307253, '--port=mac']" exit_code: 2 cwd: /Volumes/Data/EWS/WebKit Last 500 characters of output: th fuzz 2 (offset -4 lines). 1 out of 4 hunks FAILED -- saving rejects to file Source/JavaScriptCore/API/JSWrapperMap.mm.rej patching file Source/JavaScriptCore/API/ObjcRuntimeExtras.h patching file Source/JavaScriptCore/API/tests/JSExportTests.mm Hunk #3 succeeded at 145 with fuzz 1. Hunk #4 succeeded at 208 with fuzz 2 (offset 40 lines). Failed to run "[u'/Volumes/Data/EWS/WebKit/Tools/Scripts/svn-apply', '--force', '--reviewer', u'Geoffrey Garen']" exit_code: 1 cwd: /Volumes/Data/EWS/WebKit Full output: http://webkit-queues.webkit.org/results/3933609 1319462 5 mitz 2017-06-14 22:57:41 -0700 Fixed in <https://trac.webkit.org/r218316>. 307253 2017-04-16 19:46:15 -0700 2017-06-14 22:45:24 -0700 Avoid skipping over underscore-prefixed classes that JSExport bug-168578-20170416194614.patch text/plain 8271 mitz SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gMjE1NDA0KQorKysgU291cmNl L0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDI1IEBA CisyMDE3LTA0LTE2ICBEYW4gQmVybnN0ZWluICA8bWl0ekBhcHBsZS5jb20+CisKKyAgICAgICAg W0NvY29hXSBPYmplY3RpdmUtQyBjbGFzcyB3aG9zZSBuYW1lIGJlZ2lucyB3aXRoIGFuIHVuZGVy 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