[info-performer] pfSync and Bus error

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From: Ozarka Simatomi (chumanlu++at++yahoo.com)
Date: 05/09/2002 19:20:45

Dear PFs,

    I am working on a Performer project on a SGI
octane. My program sometimes broke down with a bus
error. I use dbx to run my program and below is what I
got: (the executable is VR and source code is vr.C)

Process 14861 (VR) stopped on signal SIGBUS: Bus
error(default) at [_mips2_test_and_set32:147,
0xda1c88c]

    Source (of
/xlv47/6.5.14f/work/irix/lib/libc/libc_64_M4/mp/libmutexs.s)
not available for Process 14861

(dbx)where
>0 _mips2_test_and_set32
 1 pfFlux::getCurData
 2 pfGeoSet::getBound
 3 pfGeode::nb_clean
 4 pfDCS::nb_clean
 5 pfGroup::nb_clean
 6 ::clean
 7 ::pfAppFrame
 8 ::pfSync();
 9 ::main() ["/.../vr.C":187, 0x1000b2a0]
10 __start()

   And below is part of my code, and line 187 is
pfSync():
    while(KeepDrawingFlag)
    {
        Cursor_location[0] = mx;
         Cursor_location[1] = my;
         Cursor_location[2] = mz;
        if (StartBufferDataFlag)
        {
            StartBufferTime = pfGetTime()*1000.0;
            StartBufferDataFlag = FALSE;
        }
        if (StopBufferDataFlag)
        {
            StopBufferDataFlag = FALSE;
        }
                
        while (WriteBufferDataFlag)
        {
            WriteBufferDataFlag = FALSE;
        }
        Cursor_dcs->setTrans(Cursor_location[0],
Cursor_location[1], Cursor_location[2]);
187: pfSync();
        pfFrame();
        .
          .
        .
        .
        }

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