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|  Message 1001  |
|  andrew clarke to All  |
|  Debugging MakeNL  |
|  24 Aug 13 01:09:02  |
 
This month I finally managed to get a usable installation of eComStation
running under VirtualBox in Linux. It's amazing how many old installers want
to modify CONFIG.SYS which causes OS/2 to become unbootable due to system DLL
version mismatches, etc.
The VirtualBox Additions work well, so I can copy & paste between Linux and
OS/2 using the shared clipboard. Very cool. Also I finally worked out how to
connect OS/2 to a Samba share.
Anyway, I've ported MakeNL to IBM VisualAge for OS/2 and in the process
managed to code a workaround for the crash in the Watcom OS/2 version. See the
recent CVS commits. I suspect I've just hidden the problem though.
Probably related, I'm seeing segfaults with the EMX version:
[c:\src\makenl\src]del outfile\testnet.242
Deleting C:\src\makenl\src\outfile\testnet.242
1 file deleted 1,024 bytes freed
[c:\src\makenl\src]makenl.exe
MakeNL 3.3.6 (EMX) compiled with GNU C on Aug 24 2013 01:04:51
MakeNL started
Cmdline: C:\src\makenl\src\makenl.exe
Using 'makenl.ctl' in 'C:\src\makenl\src'
Begin processing 'testnet.' -- 1:11, Saturday, August 24, 2013
Process terminated by SIGSEGV
core dumped
[c:\src\makenl\src]del outfile\testnet.242
Deleting C:\src\makenl\src\outfile\testnet.242
1 file deleted 1,024 bytes freed
[c:\src\makenl\src]gdb makenl.exe
GDB is free software and you are welcome to distribute copies of it
under certain conditions; type "show copying" to see the conditions.
There is absolutely no warranty for GDB; type "show warranty" for details.
GDB 4.16 (emx), Copyright 1996 Free Software Foundation, Inc...
Starting program: c:/src/makenl/src/makenl.exe
[New thread 1]
Program received signal SIGSEGV, Segmentation fault.
[Switching to thread 1]
Program received signal SIGSEGV, Segmentation fault.
0x1e989 in closedir ()
(gdb) bt
#0 0x1e989 in closedir ()
#1 0x19d93 in os_findfirst (pff=0x283f64c, path=0x36b58 "200",
mask=0x283f54c "*.msg") at osgnufnd.c:36
#2 0x18c78 in SearchMaxMSG (path=0x36b58 "200") at msgtool.c:86
#3 0x1912c in OpenMSGFile (address=0x3600c,
filename=0x335f0 "C:\\src\\makenl\\src\\outfile\\testnet.242")
at msgtool.c:167
#4 0x16d14 in main (argc=1, argv=0x283ffd0) at makenl.c:329
[c:\src\makenl\src]grep -n SearchMaxMSG *.c | grep :167
msgtool.c:167: MSGnum = SearchMaxMSG(MessageDir);
Clearly another part of the code is corrupting MessageDir.
I saw this bug in the Turbo C (DOS) version too a few weeks back, but there's
obviously no memory protection there, so I wasn't sure how to begin to debug
it.
Anyway, progress. :-)
--- GoldED+/BSD 1.1.5-b20110223-b20110223
* Origin: Blizzard of Ozz, Melbourne, Victoria, Australia (3:633/267)
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