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Problem Report 1444 Details

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Report 1444 Actions

    Problem Report Number 1444
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0726
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published 1995-12-11 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/mmap 7
    Problem Summary TSD4U.00089 The test may fail on implementations because memory is not ensured to be synced with disk.
    Problem Text
    The test may fail on implementations because memory is not ensured to
    be synced with disk.

    The standard states in the mmap() function description,

    It is also unspecified whether write references to a
    memory region mapped with MAP_SHARED are visible to
    processes reading the file and whether writes to a
    file are visible to processes that have mapped the
    modified portion of that file, except for the effect
    of msync().

    Without an intervening msync() call, the test cannot be assured that
    the information on disk has been synchronized when the read() is
    attempted.
    Test Output
    10|1553 /tset/CAPIbase/fmmap/fmmap7 18:27:55|TC Start, scenario ref 76-1
    15|1535 1.10 1|TCM Start
    400|1535 7 1 18:27:58|IC Start
    200|1535 1 18:27:58|TP Start
    520|1535 1 60555296 1 1|SPEC1170TESTSUITE CASE 7
    520|1535 1 60555296 1 2|A successful call to void *mmap(void *addr, size
    520|1535 1 60555296 1 3|len, int prot, int flags, int fildes, off_t off)
    520|1535 1 60555296 1 4|fildes is associated with a regular file, the
    520|1535 1 60555296 1 5|MAP_SHARED flag is set in flags, and the PROT_WR
    520|1535 1 60555296 1 6|flag is set in prot shall map len bytes at offse
    520|1535 1 60555296 1 7|in the file associated with fildes into the
    520|1535 1 60555296 1 8|address space of the process, allow the mapped a
    520|1535 1 60555296 1 9|be written such that write references change the
    520|1535 1 60555296 1 10|file, and return the location in the address
    520|1535 1 60555296 1 11|space at which the mapping is made.
    520|1535 1 71565336 1 1|PREP: Obtain the system page size by call to
    520|1535 1 71565336 1 2| sysconf(_SC_PAGESIZE)
    520|1535 1 71565336 1 3|PREP: Establish signal handlers for SIGSEGV and
    520|1535 1 71565336 1 4|PREP: Open a file and initialize it
    520|1535 1 71565336 1 5|PREP: Allocate memory for buffer
    520|1535 1 71565336 1 6|PREP: Now set proper permissions and re-open fil
    520|1535 1 86114326 1 1|TEST: Child1: mmap() with MAP_SHARED returns
    520|1535 1 86114326 1 2| location where file is mapped
    520|1535 1 86114326 1 3|TEST: Child1: Mapped page at that address may be
    520|1535 1 71565336 3 1|TEST: Verify that file has been updated
    520|1535 1 71565336 3 2|ERROR: Word 0 in file was 1024, should be 1
    520|1535 1 93257735 1 1|TEST: Child2: mmap() with MAP_SHARED returns
    520|1535 1 93257735 1 2| location where file is mapped
    520|1535 1 93257735 1 3|TEST: Child2: Mapped page at that address may be
    520|1535 1 93257735 1 4| written
    220|1535 1 1 18:28:00|FAIL
    410|1535 7 1 18:28:00|IC End
    80|1553 0 18:28:00|TC End

    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.

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