[Webkit-unassigned] [Bug 71718] New: Apparent threading bug causes intermittent segfaults

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=71718

           Summary: Apparent threading bug causes intermittent segfaults
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Critical
          Priority: P2
         Component: WebKit Qt
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rectalogic at rectalogic.com


Created an attachment (id=113908)
 --> (https://bugs.webkit.org/attachment.cgi?id=113908&action=review)
sample app to reproduce the crash

Web pages using WebWorkers occasionally crash. There seems to be some thread synchronization issue.

A reduced testcase is attached. Run the included loop.sh script to run the testcase repeatedly in a loop, usually after 10 or so runs it will crash. You can also build with "make DEFINES=-DSUSPEND" which will install a SIGSEGV handler and suspend the process on SEGV - allowing gdb to be attached to the running process at the point the SEGV occurs.

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