linux-kernel - patch related to SIGSEGV handling in multiple threads and hung threads

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Date:	Fri, 15 May 2009 16:35:49 +0530
From:	Sudarshan Soma <sudarshan12s@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: patch related to SIGSEGV handling in multiple threads and hung 
	threads

Hi ,
I have a program which will create multiple threads. One of the thread
receives SIGSEGV and it prints stacktrace in its handler and calls
_exit(-1). The call to exit wont terminate all threads in  a process
and hence thread hangs here. This causes resouce leaks and other
problems. It is seen only on linux 2.4.20.

For printing stacktrace it uses
__builtin_return_address and __builtin_frame_address

The same program works fine on linux 2.6.26 kernel. It  will exit the
whole process when one of its thread dies as above.

Please let me know the patch details or any workaround, if any. This
is a bit urgent, so please let me know for any pointers , if any

Thanks and Best Regards,
Pavan.
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