Programming

Hi all,
After compiling my Pro-c program, while trying to run it I am receving segmentation violation at-

sqlcxt((void **)0, &sqlctx, &sqlstm, &sqlfpn);

The exact error is-

Program received signal SIGSEGV, Segmentation fault.
0x7af99090 in _sigfillset+0x5c0 () from /usr/lib/libc.2

following is the Backtrace of the core file thru gdb-

/opt/langtools/bin/gdb /home/vs9178/cms/bin/edget core
HP gdb 3.2 for PA-RISC 1.1 or 2.0 (narrow), HP-UX 11.00.
Copyright 1986 - 2001 Free Software Foundation, Inc.
Hewlett-Packard Wildebeest 3.2 (based on GDB) is covered by the
GNU General Public License. Type "show copying" to see the conditions to
change it and/or distribute copies. Type "show warranty" for warranty/support.
..
Core was generated by `edget'.
Program terminated with signal 11, Segmentation fault.

warning: The shared libraries were not privately mapped; setting a
breakpoint in a shared library will not work until you rerun the program.

#0 0xc0198090 in _sigfillset+0x5c0 () from /usr/lib/libc.2
(gdb) bt
#0 0xc0198090 in _sigfillset+0x5c0 () from /usr/lib/libc.2
#1 0xc0195bbc in _sscanf+0x68c () from /usr/lib/libc.2
#2 0xc019b294 in malloc+0x18c () from /usr/lib/libc.2
#3 0xcdeb4f6c in sltstidinit+0x18 () from /usr/local/opt/oracle/product/acmdb01d/lib32/libclntsh.sl.9.0
#4 0xcde65774 in lxhLangEnv+0x5c () from /usr/local/opt/oracle/product/acmdb01d/lib32/libclntsh.sl.9.0
#5 0xcde64b74 in lxhnlangid+0x34 () from /usr/local/opt/oracle/product/acmdb01d/lib32/libclntsh.sl.9.0
#6 0xcd679150 in sqgctx+0x2d0 () from /usr/local/opt/oracle/product/acmdb01d/lib32/libclntsh.sl.9.0
#7 0xcd678dcc in sqgrct+0x50 () from /usr/local/opt/oracle/product/acmdb01d/lib32/libclntsh.sl.9.0
#8 0xcd668008 in sqlcmex+0x370 () from /usr/local/opt/oracle/product/acmdb01d/lib32/libclntsh.sl.9.0
#9 0xcd6685cc in sqlcxt+0x78 () from /usr/local/opt/oracle/product/acmdb01d/lib32/libclntsh.sl.9.0
#10 0x2981c in check_out_ok (project=0x40029668 "acm", release=42, dir=0x401d2628 "uc/clf", flnm=0x401d268c "try.c")
at cms_get.c:1994
#11 0x2a174 in edit_one_source (cms_project=0x40029668 "acm", cms_release=42, dir=0x401d2628 "uc/clf",
flnm=0x401d268c "try.c", target_dir=0x400ddd50 "/home/vs1111@\002\362\327\017\017\377", target_flnm=0x400ddd68 "try.c",
mr=5307, cr=1) at cms_get.c:2300
#12 0x2a59c in edget (argc=5, argv=0x7f7f0a34) at cms_get.c:2409
#13 0x56c40 in main (argc=5, argv=0x7f7f0a34) at main.c:145
(gdb) quit


Any help in this regard is highly appreciated.

TIA.

First off, this is usually caused by overwriting the bounds of an array - usually a char array.

Next, the problem "shows" sqlcxt, but it occurs because of your code, most likely at check_out_ok or from an argument passed into check_out_ok.

It's hard to say without seeing the code, but you might be trying to dereference a NULL pointer.

Code:

sqlcxt((void **)0, &sqlctx, &sqlstm, &sqlfpn);

Unless this "sqlcxt" function knows to leave it alone, the "(void **)0" thing is highly abnormal. 0 is NULL, and not an address normal programs have read or write access to, hence the crash when it tries to use it. Box that code in with error checking and find out where that NULL is coming from.

Hi
If am not wrong sqlcxt is a part of the code which has been replaced by the equivalent code for an SQL Query after compiling ur .pc...if thts the case...could u plz post the query whr sqlcxt has occured...

Hi,
For me, I was using oracle 9i client (64 bit) on a 64 bit machine and I got the same error - seg fault trying to access a SQL function. I recompiled using 32 bit libraries and it works. You may want to try that if its ok for you to use 32 bit.