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Problem Report 2027 Details

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Report 2027 Actions

    Problem Report Number 2027
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Rejected (REJ)
    Problem Resolution ID REJ.X.0600
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published null
    Product Standard Internationalised System Calls and Libraries Extended V2 (UNIX 98)
    Certification Program The Open Brand certification program
    Test Suite VSTH version 5.1.2
    Test Identification PTHR.os/all/sigwait 2
    Problem Summary PG5TH.00008 The test states that it trying to do the following: Block SIGALRM in the main thread and install a signal handler. Create two threads. One thread unblocks SIGALRM, the other thread issues a sigwait() ...
    Problem Text

    The test states that it trying to do the following:

    Block SIGALRM in the main thread and install a signal handler. Create two
    threads. One thread unblocks SIGALRM, the other thread issues a sigwait()
    on SIGALRM. Sent a SIGALRM to the process. Check the number of signals
    received and the identity of the receiving thread.

    However, we believe that one of the thread deadlocks while the the
    second thread does not record that it received the signal causing a
    false fail. The following diff shows how we believe the test needs to
    be modified in order to work correctly.

    *** sigwait.c Thu Apr 30 14:18:53 1998




    --- sigwait.c.new Thu Apr 30 14:54:34 1998
    ***************
    *** 403,409 ****
    T2_flag = 0;
    T2_sig = 0;
    T2_nsigs = 0;
    - T2_tid = pthread_self();

    t2_ssigs( errors, fails );

    --- 403,408 ----
    ***************
    *** 477,483 ****
    /****** the main thread has SIGALRM blocked
    thread 1 is in a sigwait with SIGALRM blocked,
    thread 2 is in a pthread_cond_wait() with SIGALRM unblocked
    ******/
    !
    rval = kill( getpid(), SIGALRM );
    if ( rval != 0 )
    {
    --- 476,482 ----
    /****** the main thread has SIGALRM blocked
    thread 1 is in a sigwait with SIGALRM blocked,
    thread 2 is in a pthread_cond_wait() with SIGALRM unblocked
    ******/
    ! T2_tid = 0;
    rval = kill( getpid(), SIGALRM );
    if ( rval != 0 )
    {
    ***************
    *** 609,614 ****
    --- 608,615 ----
    {
    vsth_surprise("sigwait", 0, rval, &T2_errors);
    }
    + T2_nsigs++; /* record that we recieved the signal here */
    + /* if we get cancelled we do not get to increment */

    }
    else

    Test Output
    ************************************************************************
    /tset/PTHR.os/all/sigwait/T.sigwait 2 Failed

    Test Description:
    Signals generated for the process shall be delivered to exactly one of
    the
    threads waiting in a sigwait() call for the signal or not blocking the
    signal.
    Posix Ref: Component SIGWAIT Assertion 9945-1:1996 3.3.8.2, 9945-1:1996
    3.3.1.2-2(A)/r$$^PError: format error in archive
    /tsuites/VSTH/vsth/MAN/tset/PTHR.os/all/sigwait/L.sigwait_t,
    could not extract file

    Test Information:
    Signals generated for the process shall be delivered to exactly
    one of the threads waiting in a sigwait() call for the signal or
    not blocking the signal.
    Posix Ref: Component SIGWAIT
    Assertion 9945-1:1996 3.3.8.2, 9945-1:1996 3.3.1.2-2(A)
    The signal was not delivered
    Unexpected thread received the signal

    ************************************************************************

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    TSD5TH.00048 has been granted for this problem. We therefore recommend
    that this request be refused as a duplicate.





    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Rejected (REJ)
    Review Conclusion
    This request is refused.

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