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Problem Report 2448 Details

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Report 2448 Actions

    Problem Report Number 2448
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.1273
    Raised 2005-02-11 18:12
    Updated 2005-02-11 18:28
    Published 2005-02-11 18:28
    Product Standard Internationalised System Calls and Libraries Extended V3 (UNIX 03)
    Certification Program The Open Brand certification program
    Test Suite VSU version 5.2.6
    Test Identification CAPI.os/procprim/vfork 9,10,16
    Specification Base Definitions Issue 6
    Problem Summary The calls made in a vfork()ed child cause undefined behaviour
    Problem Text The behaviour of these tests is undefined because they call
    times(), sigpending(), or sigismember() after a vfork() and before
    successfully calling exec*() or _exit(). The standard says:

    "The vfork() function shall be equivalent to fork(), except that the
    behavior is undefined if the process created by vfork() either modifies
    any data other than a variable of type pid_t used to store the return
    value from vfork(), or returns from the function in which vfork() was
    called, or calls any other function before successfully calling
    _exit()"

    In our vfork() implementation, we lazy-allocate resources such
    as the rusage structure (where times() gets its information from)
    and signal masks, only allocating them to the child if there is in
    fact an exec*(), rather than an _exit().
    Test Output ************************************************************************
    /tset/CAPI.os/procprim/vfork/T.vfork 9 Failed

    Test Description:
    Base Required Conformance
    A successful call to pid_t vfork(void) shall set the child
    process'
    tms_utime to 0.

    Test Information:
    PREP: Eat up some time in the parent process
    TEST: Child process tms_utime is set to zero
    ERROR: Child's tms_utime values were not zero
    INFO: parent tms_utime 10
    INFO: approximate child tms_cutime 0

    ************************************************************************
    /tset/CAPI.os/procprim/vfork/T.vfork 10 Failed

    Test Description:
    Base Required Conformance
    A successful call to pid_t vfork(void) shall set the child
    process'
    tms_stime to 0.

    Test Information:
    PREP: Eat up some time in the parent process
    TEST: Child process's value of tms_stime is set to zero
    TEST: Child process is returned a value of zero
    ERROR: Child's "tms_stime" value was not zero

    ************************************************************************
    /tset/CAPI.os/procprim/vfork/T.vfork 16 Failed

    Test Description:
    Base Required Conformance
    A successful call to pid_t vfork(void) shall initialize the set of
    signals pending for the child process to the empty set.

    Test Information:
    PREP: Set process signal mask to block a signal
    PREP: Send the signal that was blocked to this process to obtain
    a pending signal
    PREP: Ensure signal is pending
    TEST: Signal not pending in child process
    ERROR: SIGUSR1 was pending in child

    Review Information

    Review Type TSMA Review
    Start Date 2005-02-11 18:12
    Last Updated 2005-02-11 18:19
    Completed 2005-02-11 18:19
    Status Complete
    Review Recommendation Test Suite Deficiency (TSD)
    Review Response This is accepted as a fault in the test suite.

    Review Type SA Review
    Start Date 2005-02-11 18:19
    Last Updated 2005-02-11 18:27
    Completed 2005-02-11 18:27
    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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