madcow:/home/public/test-tools/gdb # gdb tbug
GNU gdb 6.1
Copyright 2004 Free Software Foundation, Inc.
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are
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conditions.
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This GDB was configured as "ppc-suse-linux"...Using host libthread_db
library
"/lib/tls/libthread_db.so.1".

(gdb) break main
Breakpoint 1 at 0x10000630: file tbug.c, line 31.
(gdb) run
Starting program: /home/public/test-tools/gdb/tbug
[Thread debugging using libthread_db enabled]
[New Thread 1074020384 (LWP 26705)]
[Switching to Thread 1074020384 (LWP 26705)]

Breakpoint 1, main (argc=1, argv=0xffffe464) at tbug.c:31
31        for (n = 0; n < N; ++n)
(gdb) cont
Continuing.
[New Thread 1078217504 (LWP 26708)]
tf(0): begin
[New Thread 1082411808 (LWP 26709)]
after create
tf(1): begin
tf(0): end
[Thread 1078217504 (LWP 26708) exited]
tf(1): end
[Thread 1082411808 (LWP 26709) exited]
after join

Program exited normally.
(gdb) clear main
Deleted breakpoint 1
(gdb) break tf
Breakpoint 2 at 0x10000594: file tbug.c, line 15.
(gdb) run
Starting program: /home/public/test-tools/gdb/tbug
[Thread debugging using libthread_db enabled]
[New Thread 1074020384 (LWP 26710)]
reading register pc (#64): No such process.
(gdb) cont
Continuing.
reading register pc (#64): No such process.
(gdb) cont
Continuing.
reading register pc (#64): No such process.
(gdb) cont
Continuing.
reading register pc (#64): No such process.
(gdb) quit
The program is running.  Exit anyway? (y or n) y