>>>>> "Steven" == Steven Fletcher <flec@stripped> writes:
Steven> Hi all.
Steven> I encountered an odd problem today. I have a program that's pulling
Steven> information from some Magick (1.4) services databases and inserting the
Steven> info into an SQL server. For the first time in about 10 weeks of use, it
Steven> decided to core on me. I ran a quick GDB check but didn't have chance to
Steven> run a full trace, sadly, before I updated the databases and ran the
Steven> program again, which worked flawlessley.
>> (flec@relic) 07:48:39 (sqlservices) > gdb listnicks
>> 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 (i386-unknown-freebsd),
>> Copyright 1996 Free Software Foundation, Inc...(no debugging symbols found)...
>> (gdb) core-file listnicks.core
>> Core was generated by `listnicks'.
>> Program terminated with signal 11, Segmentation fault.
>> Reading symbols from /usr/local/lib/mysql/libmysqlclient.so.7...
>> (no debugging symbols found)...done.
>> Reading symbols from /usr/lib/libc.so.3...(no debugging symbols found)...done.
>> Reading symbols from /usr/lib/libm.so.2...(no debugging symbols found)...done.
>> Reading symbols from /usr/lib/libcrypt.so.2...(no debugging symbols found)...
>> done.
>> Reading symbols from /usr/libexec/ld-elf.so.1...(no debugging symbols found)...
>> done.
>> #0 0x280f8de6 in memcpy ()
>> (gdb) down
>> Bottom (i.e., innermost) frame selected; you cannot go down.
>> (gdb) up
>> #1 0xb in ?? ()
>> (gdb) up
>> #2 0x28084df1 in mysql_select_db ()
>> (gdb) up
>> #3 0x80572eb in listmemos ()
>> (gdb) up
>> #4 0x805bcd1 in listnicks ()
>> (gdb)
Steven> I can understand then, of course, that somewhere along the line one of
Steven> the databases got corrupted and broke the program for reasons unknown.
Steven> I'm a bit stumped however, because the broken file seemed to break
Steven> memcpy() from within mysql_select_db(), which is what I certainly
Steven> wouldn't expect. If it broke some other part of my program, example
Steven> mysql_query() then I'd understand... but can anyone throw any light on
Steven> the matter here?
Hi!
My guess would be that somehow the MYSQL structure in your client
got trashed by a stray pointer and this crashed your program when
mysql_select_db tried to use it.
Regards,
Monty
PS: Sorry for the long delay before replying, but I just come back from
a 2 weeks vacation trip.
