Re: gdb says that it can't compute the CFA

To: Darren Reed <darrenr%netbsd.org@localhost>
Subject: Re: gdb says that it can't compute the CFA
From: Martin Husemann <martin%duskware.de@localhost>
Date: Sun, 15 Jun 2014 05:47:58 +0200

On Sun, Jun 15, 2014 at 03:51:19AM +1000, Darren Reed wrote:
> Is there any way to get around this problem with gdb on sparc64?
> 
> #3  0x0000000000103278 in main (
>     argc=<error reading variable: can't compute CFA for this frame>,
>     argv=<error reading variable: can't compute CFA for this frame>)

This is a general gcc 4.8 problem - depending on optimization and various
other settings, debug info is not always available for some frames.
Especially for -O0 it is unusable unless you specify things like 
-fvar-tracking -fvar-tracking-assignments.

Martin

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