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Problem Report 0197 Details

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Report 0197 Actions

    Problem Report Number 0197
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0197
    Raised 1994-12-16 08:00
    Updated 2003-03-13 08:00
    Published 1994-12-30 08:00
    Product Standard Internationalised System Calls and Libraries (XPG4)
    Certification Program The Open Brand certification program
    Test Suite VSX4 version 4.3.4
    Test Identification XOPEN.os/genuts/tsearch 13
    Problem Summary TSD4.197 A dependency on the ASCII character set is causing this testcase to fail. When debugging was enabled, we saw: tsearch.c: 01251: 0002: t13_action: trace: jump counter 18 tsearch.c: 01253: 0002: t13_act...
    Problem Text
    A dependency on the ASCII character set is causing this testcase to
    fail. When debugging was enabled, we saw:

    tsearch.c: 01251: 0002: t13_action: trace: jump counter 18
    tsearch.c: 01253: 0002: t13_action: t13_action: node->string :i: node->length :1:
    tsearch.c: 01255: 0002: t13_action: t13_action: order :1: level :2:
    tsearch.c: 01261: 0002: t13_action: t13_action: tnode :8: prev_order :0:
    tsearch.c: 01263: 0002: t13_action: t13_action: (*node)->string :i: alphabet :i:
    tsearch.c: 01265: 0002: t13_action: t13_action: pass[8] :1:
    tsearch.c: 01266: 0002: t13_action: t13_action: table13[6].string :i:
    tsearch.c: 01268: 0002: t13_action: t13_action: table13[6].length :1:
    tsearch.c: 01270: 0002: t13_action: t13_action: order :1: level :2:
    tsearch.c: 01276: 0002: t13_action: t13_action: t13_fail[8][1].failed :0:
    tsearch.c: 01281: 0002: t13_action: t13_action: t13_fail[8][1].failed :0:
    tsearch.c: 01286: 0002: t13_action: t13_action: t13_fail[8][1].failed :0:
    tsearch.c: 01291: 0002: t13_action: t13_action: t13_fail[8][1].failed :0:
    tsearch.c: 01251: 0002: t13_action: trace: jump counter 19
    tsearch.c: 01253: 0002: t13_action: t13_action: node->string :j: node->length :1:
    tsearch.c: 01255: 0002: t13_action: t13_action: order :3: level :3:
    tsearch.c: 01261: 0002: t13_action: t13_action: tnode :16: prev_order :0:
    tsearch.c: 01263: 0002: t13_action: t13_action: (*node)->string :j: alphabet ::
    tsearch.c: 01265: 0002: t13_action: t13_action: pass[16] :0:
    tsearch.c: 01266: 0002: t13_action: t13_action: table13[231].string :

    The failure takes place as t13_action is processing the leaf node
    whose string is "j". Note that the index into table13[] on line 1266
    is 231. table13[] only has 10 elements so this access will be produce
    unpredictable results, with SIGSEGV being a distinct possiblity. This
    value being used as an index into table13[] is "ord[tnode]" and the
    value of tnode is shown as 16 as the index to pass[] on line 1265.
    tnode is arrived at with the following assignment on line 1257:

    tnode = *(*node)->string - 'a';

    In EBCDIC, 'j' is 0x91 and 'a' is 0x81 so their difference is 16, not
    9 as expected when subtracting the ASCII equivalents of 'j' and 'a'.

    t13_action() should not depend on the characters 'a' through 'j' being
    contiguous.
    Test Output
    /tset/XOPEN.os/genuts/tsearch/T.tsearch 13 Unresolved

    Test Description:
    twalk() passes :
    a. the address of the node being visited as the first argument of the
    function action;
    b. the enumeration constant :
    i. preorder as the second argument of the function action, when
    the node is visited the first time;
    ii. postorder as the second argument of the function action,
    when the node is visited the second time;
    iii. endorder as the second argument of the function action,
    when the node is visited the third time;
    iv. leaf as the second argument of the function action, when the
    node is a leaf;
    c. the level of the node being visited as the third argument of the
    function action.

    Test Information:
    unexpected signal 11 (SIGSEGV) received

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    It is accepted that there is a test suite dependency on the ASCII character
    set for this test. It is recommended that this request be granted as it
    relates to a test suite deficiency.

    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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