[root@localhost test]#
[root@localhost test]#
[root@localhost test]# gcc -o server ex-serv-srp.c -lgnutls -Wall -Werror -g
[root@localhost test]#
[root@localhost test]#
[root@localhost test]# gdb
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-50.el6)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
(gdb) file /opt/test/server
Reading symbols from /opt/test/server...done.
(gdb) run /opt/test/server
Starting program: /opt/test/server /opt/test/server
[Thread debugging using libthread_db enabled]
Echo Server ready. Listening to port '5556'.

- connection from 127.0.0.1, port 38149
*** glibc detected *** /opt/test/server: double free or corruption (fasttop): 0x080585c0 ***
======= Backtrace: =========
/lib/libc.so.6(+0x6ea31)[0x28da31]
/usr/local/lib/libgnutls.so.28(+0x90bd9)[0x1c1bd9]
/usr/local/lib/libgnutls.so.28(+0x9095a)[0x1c195a]
/usr/local/lib/libgnutls.so.28(+0x1e878)[0x14f878]
/usr/local/lib/libgnutls.so.28(+0x1c1a8)[0x14d1a8]
/usr/local/lib/libgnutls.so.28(gnutls_handshake+0x47)[0x14d937]
/opt/test/server[0x8049040]
/lib/libc.so.6(__libc_start_main+0xe6)[0x235ce6]
/opt/test/server[0x8048c51]
======= Memory map: ========
00110000-0012e000 r-xp 00000000 fd:00 131042     /lib/ld-2.12.so
0012e000-0012f000 r--p 0001d000 fd:00 131042     /lib/ld-2.12.so
0012f000-00130000 rw-p 0001e000 fd:00 131042     /lib/ld-2.12.so
00130000-00131000 r-xp 00000000 00:00 0          [vdso]
00131000-00219000 r-xp 00000000 fd:00 18887      /usr/local/lib/libgnutls.so.28.3.0
00219000-0021f000 rw-p 000e7000 fd:00 18887      /usr/local/lib/libgnutls.so.28.3.0
0021f000-003a8000 r-xp 00000000 fd:00 131049     /lib/libc-2.12.so
003a8000-003a9000 ---p 00189000 fd:00 131049     /lib/libc-2.12.so
003a9000-003ab000 r--p 00189000 fd:00 131049     /lib/libc-2.12.so
003ab000-003ac000 rw-p 0018b000 fd:00 131049     /lib/libc-2.12.so
003ac000-003af000 rw-p 00000000 00:00 0
003af000-003fb000 r-xp 00000000 fd:00 4823       /usr/lib/sse2/libgmp.so.3.5.0
003fb000-003fe000 rw-p 0004b000 fd:00 4823       /usr/lib/sse2/libgmp.so.3.5.0
003fe000-00405000 r-xp 00000000 fd:00 131077     /lib/librt-2.12.so
00405000-00406000 r--p 00006000 fd:00 131077     /lib/librt-2.12.so
00406000-00407000 rw-p 00007000 fd:00 131077     /lib/librt-2.12.so
00407000-0041e000 r-xp 00000000 fd:00 131073     /lib/libpthread-2.12.so
0041e000-0041f000 r--p 00016000 fd:00 131073     /lib/libpthread-2.12.so
0041f000-00420000 rw-p 00017000 fd:00 131073     /lib/libpthread-2.12.so
00420000-00422000 rw-p 00000000 00:00 0
00422000-0043f000 r-xp 00000000 fd:00 131015     /lib/libgcc_s-4.4.6-20110824.so.1
0043f000-00440000 rw-p 0001d000 fd:00 131015     /lib/libgcc_s-4.4.6-20110824.so.1
08048000-0804a000 r-xp 00000000 fd:00 281891     /opt/test/server
0804a000-0804b000 rw-p 00001000 fd:00 281891     /opt/test/server
0804b000-0806c000 rw-p 00000000 00:00 0          [heap]
b7ff5000-b7ff7000 rw-p 00000000 00:00 0
b7ffb000-b8000000 rw-p 00000000 00:00 0
bffeb000-c0000000 rw-p 00000000 00:00 0          [stack]

Program received signal SIGABRT, Aborted.
0x00130416 in __kernel_vsyscall ()
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.47.el6_2.5.i686 gmp-4.3.1-7.el6.i686 libgcc-4.4.6-3.el6.i686
(gdb)
(gdb)