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Problem Report 1448 Details

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Report 1448 Actions

    Problem Report Number 1448
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0730
    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 1
    Problem Summary TSD4U.00085 This test may fail on implementations because the env argument is improperly defined as type jmp_buf.
    Problem Text
    This test may fail on implementations because the env argument is
    improperly defined as type jmp_buf which may be smaller than the
    proper sigjmp_buf type.

    This problem was found to be a problem in the mkmmap.c capi_mmap.a
    library source file which was causing some memory info to be overwritten.

    The problem is that on line 111 of mkmmap.c the env extern variable is defined
    as a jmp_buf type but is used in sigsetjmp() in the mmap test source code.
    sigsetjmp() requires its argument to be of type sigjmp_buf and in our
    implementation type jmp_buf is considerablely smaller than sigjmp_buf causing
    the memory corruption when the sigsetjmp() call writes to the variable.
    Test Output
    A successful call to void *mmap(void *addr, size_t
    len, int prot, int flags, int fildes, off_t off) when
    fildes is associated with a regular file, the
    MAP_SHARED flag is set in flags, and the PROT_READ
    flag is set in prot shall map len bytes at offset off
    in the file associated with fildes into the
    address space of the process, allow the mapped area to
    be read, and return the location in the address space
    at which the mapping is made.
    PREP: Obtain the system page size by call to
    sysconf(_SC_PAGESIZE)
    PREP: Establish signal handlers for SIGSEGV and SIGBUS
    PREP: Open a file and initialize it
    PREP: Allocate memory for buffer
    PREP: Now set proper permissions and re-open file
    TEST: mmap() with MAP_SHARED returns the address
    where file is mapped
    TEST: Mapped page at that address may be read
    ERROR: Mapped page has invalid contents
    At offset 0 Expected: 1 Received: 1024
    1 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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