Debug differences between 386 and x86_64.

[Sam Varshavchik <mrsam courier-mta com>]

I have a favorite trick for debugging daemon processes: put a "sleep(300)" 
right before the section of code I want to debug, start the daemon, when it 
hits the sleep I find the process, and attach the debugger to it.

Under the 386 kernel, the debugger breaks into the sleep() call, and the 
"finish" gdb command immediately terminates the sleep(); then I proceed to 
debug the code.

When I try this trick on Opteron, I find that the "finish" command does not 
immediately terminate.  The process seems to continue to sleep for the 
prescribed amount of time.  Obviously, this slows things down.  Is there a 
trick that I can do to immediately terminate the sleep syscall on Opteron?

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