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Problem Report 1368 Details

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Report 1368 Actions

    Problem Report Number 1368
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0650
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published 1996-11-22 08:00
    Product Standard Internationalised System Calls and Libraries Extended (UNIX 95)
    Certification Program The Open Brand certification program
    Test Suite VSU version 4.1.0
    Test Identification Base/bsd_signal 3
    Problem Summary TSD4U.00167 This test may fail intermittently on very slow systems.
    Problem Text
    This test may fail intermittently and is yet another example of timing
    dependencies within VSU that fail to take into consideration specific
    system dependencies.

    This test is attempting to test that a SIGCHLD signal is generated for
    the calling process whenever any of its child processes stop. It does
    this by fork()ing the children and then setting the SIGCHLD interrupt
    handler and then tests whether a SIGSTOP to random children produces
    a SIGCHLD interrupt using the following code:

    tet_infoline("TEST: SIGSTOP to random children produce SIGCHLD interrupts");
    dropped = 0;
    received = 0;
    for(i=0; i<MAX_STOPS; i++) {
    child = (int)(drand48() * (double)(MAX_CHILDREN-1));
    signal_received = 0;
    sighold(SIGCHLD);
    avs_set_alarm(NSECS_ALARM);
    kill(children[child], SIGSTOP);
    sigpause(SIGCHLD);
    avs_ignore_alarm();
    if(signal_received == 0) {
    dropped++;
    } else {
    received++;
    }
    }

    The problem however, is that NSECS_ALARM is defined as "2" which may not
    always be enough time for SIGCHLD to be added to the calling process's
    signal mask. Increasing this value to a value more appropriate to the
    system under test results in the test passing.
    Test Output
    TEST CASE: bsd_signal

    TEST PURPOSE #3
    After a successful call to void (*bsd_signal(int sig,
    void (*func)(int))) (int) when sig is SIGCHLD a
    SIGCHLD signal shall be generated for the calling
    process whenever any of its child processes stop.
    PREP: Start up children
    PREP: Set SIGCHLD interrupt handler
    TEST: SIGSTOP to random children produce SIGCHLD interrupts
    ERROR: System did not send 6 signals of 1000 sent
    3 FAIL

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    We agree this is a test suite deficiency in the test
    suite version(s) listed.

    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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