140175 2015-01-06 23:52:12 -0800 [Mac] Secondary WebKit processes get re-exec'ed twice when running under ASan 2015-01-09 14:54:49 -0800 1 1 1 Unclassified WebKit WebKit2 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=140316 InRadar P2 Normal --- 1 ap ap andersca commit-queue dburkart mrowe sam oldest_to_newest 1059343 0 ap 2015-01-06 23:52:12 -0800 ASan needs to have its dynamic library inserted using DYLD_INSERT_LIBRARIES. When an ASanified binary is loaded and notices that this hasn't been done, it re-execs the process with environment updated. We already do a re-exec in Development builds of WebKit processes, pretty much for the same reason. Getting two re-execs it very annoying in debugging, because the debugger stops on exec. So if you wait to attach to com.apple.WebKit.WebContent.Development, you need to hit continue twice when it launches. 1059344 1 244143 ap 2015-01-07 00:03:10 -0800 Created attachment 244143 proposed fix As a separate fix, we'll also need to insert the library into the main process in run-webkit-tests and in run-safari. Having an extra re-exec in secondary process is the more annoying problem, because various IPC timeouts can pass while one resumes the process. 1059345 2 244144 ap 2015-01-07 00:06:41 -0800 Created attachment 244144 proposed fix Better behavior for release builds in the theoretical case where ASan library name becomes different. It's not a big problem to re-exec in release build, because it's probably not being debugged. So it doesn't have to be fatal if we can't find the library. 1059424 3 244167 ap 2015-01-07 11:08:05 -0800 Created attachment 244167 proposed fix Structured it slightly nicer. 1059425 4 commit-queue 2015-01-07 11:10:42 -0800 Attachment 244167 did not pass style-queue: ERROR: Source/WebKit2/UIProcess/Launcher/mac/ProcessLauncherMac.mm:97: One line control clauses should not use braces. [whitespace/braces] [4] Total errors found: 1 in 2 files If any of these errors are false positives, please file a bug against check-webkit-style. 1059446 5 ap 2015-01-07 11:49:34 -0800 Committed <http://trac.webkit.org/r178043>, build fix in <http://trac.webkit.org/r178044>. 1060292 6 ap 2015-01-09 14:54:49 -0800 <rdar://problem/19431848> 244143 2015-01-07 00:03:10 -0800 2015-01-07 00:06:41 -0800 proposed fix insert-asan.txt text/plain 2549 ap SW5kZXg6IFNvdXJjZS9XZWJLaXQyL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi S2l0Mi9DaGFuZ2VMb2cJKHJldmlzaW9uIDE3ODAyNCkKKysrIFNvdXJjZS9XZWJLaXQyL0NoYW5n ZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDE2IEBACisyMDE1LTAxLTA2ICBBbGV4ZXkg UHJvc2t1cnlha292ICA8YXBAYXBwbGUuY29tPgorCisgICAgICAgIFtNYWNdIFNlY29uZGFyeSBX ZWJLaXQgcHJvY2Vzc2VzIGdldCByZS1leGVjJ2VkIHR3aWNlIHdoZW4gcnVubmluZyB1bmRlciBB U2FuCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0xNDAx 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