Been getting a lot of strange crashes of late. Backtraces show like:
Core was generated by `circle -C3 4008'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/lib/libz.so.1...done.
Reading symbols from /lib/libcrypt.so.1...done.
Reading symbols from /usr/lib/libmysqlclient.so.6...done.
Reading symbols from /lib/libc.so.6...done.
Reading symbols from /lib/libnsl.so.1...done.
Reading symbols from /lib/libm.so.6...done.
Reading symbols from /lib/ld-linux.so.2...done.
Reading symbols from /lib/libnss_nisplus.so.2...done.
Reading symbols from /lib/libnss_files.so.2...done.
Reading symbols from /lib/libnss_nis.so.2...done.
Reading symbols from /lib/libnss_dns.so.2...done.
Reading symbols from /lib/libresolv.so.2...done.
#0 0x2ab71fd9 in chunk_alloc () from /lib/libc.so.6
(gdb) #0 0x2ab71fd9 in chunk_alloc () from /lib/libc.so.6
#1 0x2ac0c2c0 in __DTOR_END__ () from /lib/libc.so.6
Cannot access memory at address 0x10.
(gdb) 264
265 #endif /* CIRCLE_WINDOWS || CIRCLE_MACINTOSH */
266
267
268 #define plant_magic(x) do { (x)[sizeof(x) - 1] = MAGIC_NUMBER; }
while (0)
269 #define test_magic(x) ((x)[sizeof(x) - 1])
270
271 int main(int argc, char **argv)
272 {
273 int pos = 1;
(gdb) No locals.
(gdb) #0 0x2ab71fd9 in chunk_alloc () from /lib/libc.so.6
#1 0x2ac0c2c0 in __DTOR_END__ () from /lib/libc.so.6
Cannot access memory at address 0x10.
(gdb) (gdb) (gdb) $1 = 51 '3'
(gdb) (gdb)
I've compiled with -g, no -O2, and this is what I have gdb run:
bt
list
info locals
where
print *ch
print *d
print *buf
print *obj
quit
Does anyone know of any good sites that discuss how to debug something
like a MUD, getting into some of the advanced stacktracing functions of
gdb? I know I'm obviously not tapping a lot of it's potential but I've
never really needed to do much beyond this level.
--
StormeRider
Creator of Winds of Storm mudhosters.net:4008
Head Coder of the Last Sunrise, thelastsunrise.net:9000
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