How do I get the same thread id as supplied by 'ps -AL' in LWP column

[Simpson, John]

Hi
 
I'm running 2.6.18-1.2786.fc6 and I'm trying to debug an extravagantly
threaded program (sixteen separate threads, not my code).  
 
The problem I've got is that although each of the threads is uniquely
identifiable using 'ps -AL' or '/proc/PID/task' (information which is
also available on creation and destruction to gdb) I cannot get the same
identifiers programmatically.  I've tried pthread_self() and
syscall(_NR_gettid) but they just return the identifier of the
initiating thread rather than the thread I'm calling them from.  This
makes debugging extremely difficult, for example I can see from 'ps -AL'
that some of the threads are doing the <defunct> zombie thing, but I
don't know which ones they are.
 
Any suggestions
 
Thanks
 
John


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