Home • About Us • A-Z Index • Search * Contact Us • Register • Login • Press • Shop

The Open Brand -- Problem Reporting and Interpretations System

Problem Report 1785 Details

Help Show help | Quick Search | Submit a Test Suite Support Request | Click here to view your privileges

This page provides all information on Problem Report 1785.

Report 1785 Actions

    Problem Report Number 1785
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0862
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published 1999-04-06 08:00
    Product Standard Window System Application Interface V2
    Certification Program The Open Brand certification program
    Test Suite VSW version 5.0.2
    Test Identification Xt11/XtAppReleaseCacheRefs 2
    Problem Summary TSD4W.00164 This test may fail on implementations because stack memory is being freed.
    Problem Text


    XtAppReleaseCacheRefs calls XtFree on memory that is
    on the stack (in lib/Xt/Convert.c:FreeCacheRec).

    XtAppReleaseCacheRefs contains the following code to
    define destructor:

    void XtDES_Proc(app_ctext, to_val, converter_data, args, num_args )
    XtAppContext app_ctext;
    XrmValue *to_val;
    XtPointer converter_data;
    XrmValue *args;
    Cardinal *num_args;
    {
    avs_set_event(2,avs_get_event(2)+1);
    XtFree((void *) to_val);
    }

    X11R6 lib/Xt/Convert.c contains this code that calls the destructor:

    static void FreeCacheRec(app, p, prev)
    XtAppContext app;
    CachePtr p;
    CachePtr *prev;
    {
    LOCK_PROCESS;
    if (p->has_ext) {
    if (CEXT(p)->destructor) {
    Cardinal num_args = p->num_args;
    XrmValue *args = NULL;
    XrmValue toc;
    if (num_args)
    args = CARGS(p);
    toc.size = p->to.size;
    if (p->to_is_value)
    toc.addr = (XPointer)&p->to.addr;
    else
    toc.addr = p->to.addr;
    (*CEXT(p)->destructor) (app, &toc, CEXT(p)->closure, args,
    &num_args);
    }

    Notice that to_val in XtDES_proc is &toc in FreeCacheRec which is
    a value on the stack not a value that had been previously allocated
    with XtMalloc().

    As an aside, there is no need for a destructor given the convertor
    provided since it returns a pointer to static memory and also should
    not be XtFree()'ed.

    Test Output
    TEST CASE: XtAppReleaseCacheRefs

    TEST PURPOSE #2
    Assertion XtAppReleaseCacheRefs-2.(A)
    A successful call to void
    XtAppReleaseCacheRefs(app_context, refs) shall call the
    destructor procedure and remove the resource from the
    conversion cache for any conversion entry in refs that
    reaches a conversion count of zero.
    PREP: Initialize toolkit, Open display and Create topLevel root widget
    PREP: Create windows for widgets and map them
    TEST: Register resource converter and destructor
    TEST: Invoke resource converter twice
    TEST: Resource converter was invoked
    TEST: Release the cached resource value
    TEST: Release the cached resource value again
    unexpected signal 11 (SIGSEGV) received
    2 UNRESOLVED

    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:

     

    Back   

Contact the Certification Authority