[Webkit-unassigned] [Bug 128572] New: O_CLOEXEC in shm_open does not work on FreeBSD

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=128572

           Summary: O_CLOEXEC in shm_open does not work on FreeBSD
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: lantw44 at gmail.com


In Source/WebKit2/Platform/unix/SharedMemoryUnix.cpp, line 110:
fileDescriptor = shm_open(tempName.data(), O_CREAT | O_CLOEXEC | O_RDWR, S_IRUSR | S_IWUSR);

The O_CLOEXEC flag causes the system call to fail with EINVAL (invalid arguments).

According to POSIX standard (http://pubs.opengroup.org/onlinepubs/9699919799/functions/shm_open.html), the O_CLOEXEC is not needed because the FD_CLOEXEC file descriptor flag is automatically set by shm_open.

I think we can just remove the O_CLOEXEC flag to fix the issue. This issue has caused all applications using WebKit2GTK+ on FreeBSD endlessly retrying shm_open.

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