[postgres@tux3 bao.d]$ gdb pgbch 14728
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This GDB was configured as "i386-redhat-linux"...
Attaching to program: /home/postgres/bao.d/pgbch, process 14728
Reading symbols from /lib/i686/libpthread.so.0...done.
[New Thread 1024 (LWP 14728)]
[New Thread 2049 (LWP 14729)]
[New Thread 2051 (LWP 14732)]
Loaded symbols for /lib/i686/libpthread.so.0
Reading symbols from /usr/local/pgsql/lib/libecpg.so.4...done.
Loaded symbols for /usr/local/pgsql/lib/libecpg.so.4
Reading symbols from /lib/i686/libc.so.6...done.
Loaded symbols for /lib/i686/libc.so.6
Reading symbols from /usr/local/pgsql/lib/libpgtypes.so.1...done.
Loaded symbols for /usr/local/pgsql/lib/libpgtypes.so.1
Reading symbols from /usr/local/pgsql/lib/libpq.so.3...done.
Loaded symbols for /usr/local/pgsql/lib/libpq.so.3
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/i686/libm.so.6...done.
Loaded symbols for /lib/i686/libm.so.6
Reading symbols from /lib/libcrypt.so.1...done.
Loaded symbols for /lib/libcrypt.so.1
Reading symbols from /lib/libresolv.so.2...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /lib/libnsl.so.1...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libnss_files.so.2...done.
Loaded symbols for /lib/libnss_files.so.2
0x420292e5 in sigsuspend () from /lib/i686/libc.so.6

(gdb) thread 1
[Switching to thread 1 (Thread 1024 (LWP 14728))]#0  0x420292e5 in sigsuspend ()
   from /lib/i686/libc.so.6
(gdb) where
#0  0x420292e5 in sigsuspend () from /lib/i686/libc.so.6
#1  0x40031679 in __pthread_wait_for_restart_signal () from /lib/i686/libpthread.so.0
#2  0x4002e85a in pthread_join () from /lib/i686/libpthread.so.0
#3  0x0804a065 in main (argc=9, argv=0xbffff924) at pgbch.pgc:718
#4  0x42017499 in __libc_start_main () from /lib/i686/libc.so.6
(gdb) thread 2
[Switching to thread 2 (Thread 2049 (LWP 14729))]#0  0x420e0037 in poll ()
   from /lib/i686/libc.so.6
(gdb) where
#0  0x420e0037 in poll () from /lib/i686/libc.so.6
#1  0x4002ec70 in __pthread_manager () from /lib/i686/libpthread.so.0
(gdb) thread 3
[Switching to thread 3 (Thread 2051 (LWP 14732))]#0  0x420e0037 in poll ()
   from /lib/i686/libc.so.6
(gdb) where
#0  0x420e0037 in poll () from /lib/i686/libc.so.6
#1  0x40063b64 in pqSocketPoll () from /usr/local/pgsql/lib/libpq.so.3
#2  0x40063a85 in pqSocketCheck () from /usr/local/pgsql/lib/libpq.so.3
#3  0x400639b7 in pqWaitTimed () from /usr/local/pgsql/lib/libpq.so.3
#4  0x4006398d in pqWait () from /usr/local/pgsql/lib/libpq.so.3
#5  0x400618f2 in PQgetResult () from /usr/local/pgsql/lib/libpq.so.3
#6  0x40061c4b in PQexecFinish () from /usr/local/pgsql/lib/libpq.so.3
#7  0x4004447d in ECPGexecute () from /usr/local/pgsql/lib/libecpg.so.4
#8  0x400449d8 in ECPGdo () from /usr/local/pgsql/lib/libecpg.so.4
#9  0x080490d8 in doOne (arg=0x1) at pgbch.pgc:326
#10 0x4002efef in pthread_start_thread () from /lib/i686/libpthread.so.0