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Problem Report 1567 Details

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Report 1567 Actions

    Problem Report Number 1567
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0849
    Raised 2002-01-24 08:00
    Updated 2003-03-13 08:00
    Published 2002-01-31 08:00
    Product Standard Internationalised System Calls and Libraries Extended V2 (UNIX 98)
    Certification Program The Open Brand certification program
    Test Suite VSU version 5.1.2
    Test Identification CAPI.os/ioprim/close 3
    Problem Summary TSD4U.00310 The test has a timing dependency and may fail if the child executes its close() before the parent's close().
    Problem Text
    Here what is happening:

    First, the child writes data to the slave side and
    then closes the slave.

    Next, the data arrives in the stream head of master and is flow
    controlled there.

    Then, the parent closes the slave side. This generates TCSBRK from
    ldterm down the slave side. So, ldterm waits till the slave side
    will drain its queue.

    The result is that the slave can't drain its queue because master
    stream is flow controlled. Hence master blocks and can't complete
    close, causing the test to hang and finally be killed by TET.

    If parent closes its side before the child, the child close will
    block until the parent reads the data and releases flow control.

    Test Output
    ************************************************************************
    /tset/CAPI.os/ioprim/close/T.close 3 Failed

    Test Description:
    Base Required Conformance
    The last successful call to int close(int fildes) for fildes when
    fildes is associated with a STREAM, O_NONBLOCK is not set for fildes,
    and no signals are posted for the STREAM shall wait for each module
    and driver with data on it's write queue to drain its output before
    dismantling the STREAM.

    Test Information:
    PREP: Ignore any signals
    PREP: Push modules on the STREAM
    PREP: Child: Write data into STREAM
    PREP: Child: Close end of STREAM
    PREP: Close end of STREAM (in parent)
    ERROR: Test took longer than 600 seconds: presuming
    function is hung and terminating test

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

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    This is accepted as a fault in the test suite.

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Test Suite Deficiency (TSD)
    Review Conclusion
    This is an agreed Test Suite Deficiency.

    Problem Reporting System Options:

     

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