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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Symbolic tracebacks on Debian
Date: Sat, 22 May 2010 12:25:47 +0100
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Date: 2010-05-22T12:25:47+01:00
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"(see below)" <yaldnif.w@blueyonder.co.uk> writes:

> On 21/05/2010 09:52, in article 82bpc8s17m.fsf@stephe-leake.org, "Stephen
> Leake" <stephen_leake@stephe-leake.org> wrote:

>> Because symbolic traceback are not supported on _all_ gnat platforms, I
>> don't use them on _any_ - that way my code is portable. So I did not
>> notice this problem.
>> 
>> I dump the stack trace as hex addresses, then later run addr2line
>> manually if I want the symbolic trace.
>
> Can you say exactly what the steps are to do that?
> I've never understood it + therefore never used it.

You need to call

   GNAT.Exception_Traces.Trace_On
     (Kind => GNAT.Exception_Traces.Unhandled_Raise);

from somewhere in your program and run gnatmake with -bargs -E.