Mail Archives: cygwin/2004/06/06/18:51:14
At 10:00 AM 6/6/2004, you wrote:
>I'm not sure it's my setup, but since I upgraded to Cygwin 1.5.10-3 gdb
>crashes when executing trivial calls to gethostbyname:
>
>-------------------------------
>$ gdb --args test/q
>GNU gdb 2003-09-20-cvs (cygwin-special)
>Copyright 2003 Free Software Foundation, Inc.
>GDB is free software, covered by the GNU General Public License, and you
>are
>welcome to change it and/or 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.
>This GDB was configured as "i686-pc-cygwin"...(no debugging symbols
>found)...
>(gdb) r
>Starting program: /home/em/KadC/test/q.exe
>
>Program received signal SIGSEGV, Segmentation fault.
>0xbff7a606 in KERNEL32!Heap32ListNext ()
> from /cygdrive/c/WINDOWS/SYSTEM/KERNEL32.DLL
>(gdb)
>-------------------------------
>
>The source code is very simple:
>
>-------------------------------
>#include <netdb.h>
>#include <sys/socket.h>
>
>int main(int ac, char *av[]) {
> struct hostent *hp;
>
> hp = gethostbyname("emnb");
> return 0;
>}
>-------------------------------
>
>After reinstalling 1.5.9-1 everything has gone back to normal.
>
>-------------------------------
>$ gdb --args test/q
>GNU gdb 2003-09-20-cvs (cygwin-special)
>Copyright 2003 Free Software Foundation, Inc.
>GDB is free software, covered by the GNU General Public License, and you
>are
>welcome to change it and/or 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.
>This GDB was configured as "i686-pc-cygwin"...(no debugging symbols
>found)...
>(gdb) r
>Starting program: /home/em/KadC/test/q.exe
>---Type <return> to continue, or q <return> to quit---
>
>Program exited normally.
>(gdb)
>-------------------------------
>
>Strangely enough, no SIGSEGV seems to occur if I don't run gdb.
>
>For the record, my Windows is an ancient Win98SE. The version of gdb
>should be the latest; for some reason it identifies itself as
>2003-09-20-cvs, although according to setup.exe it should be slightly
>older, 20030919-1 (the other alternative offered is 20030303-1).
>
Sounded like <http://www.cygwin.com/ml/cygwin/2004-04/msg00567.html> to
me. So I tried it. I get the SEGV in KERNEL32!IsBadWritePtr (), so I
think the above thread applies. If you ran across that or other related
threads in your search, I can understand you overlooking it. But I think
you'll find it applies.
--
Larry Hall http://www.rfk.com
RFK Partners, Inc. (508) 893-9779 - RFK Office
838 Washington Street (508) 893-9889 - FAX
Holliston, MA 01746
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