Hi Andrew,
Wednesday June 05 2013 09:40, you wrote to me:
AL> Hello Ulrich!
AL> Tuesday June 04 2013 03:15, Ulrich Schroeter wrote to Andrew Leary:
US>> first, I've found the compile problem that is caused by
US>> the filepointer around BatchFILE in main routine (makenl.c line
US>> ~325) see latest report under bug#17
AL> ...
US>> Whatever workaround I've tried to fix the return sequence
US>> it crashes under OS/2 32-bit :(
AL> Yes, I know.
US>> the problem may relate to the local int variable, that will be
US>> used to return the result to the calling routine, where the
US>> result will be assigned to a static int variable.
AL> That is a definite possibility. I'll have to research that further.
int variables tested around, that I can exclude to be the problem.
Yes, one shown bug with the in maxnum = 0; results in whatever value ...
but this isn't the cause for the crashing OS/2 32-bit executable :-P
the last tests I've running without an integer return value
in the return sequence by setting
void SearchMaxMSG()
and transfering the integer value via a static int variable SearchFeedback
AL> It shouldn't be, but I'll look into that. Maybe this is the result
AL> of the work that was done to get the code to compile on 64-bit Linux
AL> systems.
US>> Someone with much more C/C++ experiences then me should dig into
US>> this code section
AL> I'm learning more all the time.
me too =:)
ok, results found so far:
1. int variable problems doesn't interfer with the OS2 crash
in SearchMaxMSG()
2. the OS/2 executable crashes in the SearchMaxMSG() routine while trying
to jump to the return address within the calling function OpenMsgFILE()
return <whatever>;
this will do the executable guranteed (but I don't know why :( ......)
3. If the codebase (filesize of makenl.exe) increases, the crash address
increases
if the codebase decreases, the crash address decreases
4. The crash address is around 50.000 bytes below the variables areas
5. At least one known stack pointer problem we've found with the
DOS/16 compile with OW19 while calling OpenMSGFile() (fixed 2012-06-28)
Research about OW19 bug reports about stack failures gives only diffuse results
that doesn't match exactly to our current problem.
No reports found that relates to function return exceptions
AL> Andrew
regards, uli ;-)
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* Origin: AMBROSIA - Frankfurt/Main - Germany (2:244/1120)
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