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List:       gdb
Subject:    Re: Backtracing broken core dumps
From:       "Ulrich Weigand" <uweigand () de ! ibm ! com>
Date:       2009-07-20 19:52:47
Message-ID: 200907201952.n6KJqlVV020759 () d12av02 ! megacenter ! de ! ibm ! com
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Samuel Bronson wrote:
> At Sun, 19 Jul 2009 22:49:05 -0300,
> Thiago Bauermann wrote:
> > IIRC Ulrich Weigand considers that usage of the frame command to be 
> > deprecated... I don't know the rationale though.
> 
> I believe the rationale is that it doesn't actually work very well :-).

Well yes, and more importantly that it cannot be made to work well,
because -as Paul Koning already pointed out- just specifying a stack
address simply does not reliably identify a stack frame.  On many
platforms, you *need* a PC in addition to the stack address in order
to be able to unwind further.  On some platforms (IA64) you may even
need yet more information (register stack address) ...

Bye,
Ulrich

-- 
  Dr. Ulrich Weigand
  GNU Toolchain for Linux on System z and Cell BE
  Ulrich.Weigand@de.ibm.com

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