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Problem Report 2483 Details

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Report 2483 Actions

    Problem Report Number 2483
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.1288
    Raised 2005-10-14 18:20
    Updated 2005-10-15 14:48
    Published 2005-10-15 14:48
    Product Standard Internationalised System Calls and Libraries Extended V2 (UNIX 98)
    Certification Program The Open Brand certification program
    Test Suite VSU version 5.2.7
    Test Identification CAPI.os/procprim/sigaction 30
    Linked Problem Reports 2482
    Problem Summary Child process is timed out because busy wait on non-volatile variable is
    optimised away
    Problem Text The code for this test tries to time out a busy-wait for the SIGCHLD
    signal as follows:

    SET_ALARM(SLEEP_TIME);
    while(!sig_rcvd && !got_sigalrm);
    IGNORE_ALARM;

    The problem is that got_sigalrm is not declared volatile (whereas
    sig_rcvd is). So if a SIGCHLD doesn't arrive, since the test of
    got_sigalrm has been optimised away the loop doesn't exit when SIGALRM
    arrives.

    With got_sigalrm declared volatile in capi.h, the loop times out
    correctly and the test reports an Unsupported result as expected.
    Test Output /tset/CAPI.os/procprim/sigaction/T.sigaction 30 Failed

    Test Description:

    Base Conditional Conformance
    If the implementation generates SIGCHLD when a stopped child has
    continued:
    After a call to int sigaction(int sig, const struct sigaction
    *act, struct sigaction *oact) with SA_SIGINFO set in the
    sa_flags
    member of the sigaction structure pointed to by act and sig
    equal
    to SIGCHLD, on entry to the signal catching function
    specified by
    the sa_sigaction member when the stopped child has continued the
    si_code member of the structure pointed to by the siginfo
    argument
    shall contain CLD_CONTINUED, the si_pid member shall contain the
    child process ID, the si_status member shall contain the child's
    signal and the si_uid member shall contain the real user ID
    of the
    process that sent the signal.

    Test Information:
    PREP: Set up action for SIGCHLD
    PREP: fork() a child that stops itself
    PREP: Set up action for SIGCHLD
    TEST: Send SIGCONT to child
    ERROR: Test took longer than 600 seconds: presuming
    function is hung and terminating test

    Review Information

    Review Type TSMA Review
    Start Date 2005-10-14 18:20
    Last Updated 2005-10-14 19:22
    Completed 2005-10-14 19:22
    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 2005-10-14 18:22
    Last Updated 2005-10-15 05:27
    Completed 2005-10-15 05:27
    Status Complete
    Review Resolution Test Suite Deficiency (TSD)
    Review Conclusion This PR is accepted as a test suite deficiency

    Problem Reporting System Options:

     

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