From: Jeffrey Creem <jeff@thecreems.com>
Subject: Re: GNAT Spitbol segmentation fault
Date: Thu, 18 Jan 2007 07:55:41 -0500
Date: 2007-01-18T07:55:41-05:00 [thread overview]
Message-ID: <9f7484-bof.ln1@newserver.thecreems.com> (raw)
In-Reply-To: <5197nkF1jbsb0U1@mid.individual.net>
Alex R. Mosteo wrote:
> Hello,
>
> before filing a bug report I'd like to hear your opinion to rule out a
> mistake on my part. I'm using the excellent Gnat.Spitbol.Patterns package
> to extract some patterns from large bodies of text. I'm doing it with this
> scheme:
>
> declare
> Text : aliased Vstring := <initial text>;
> Target : aliased Vstring;
>
> Patt : constant Pattern := Some_Patterns ** Target;
> begin
> while Match (Text, Target, "") loop
> -- This extracts a Target string and removes it from the text.
> -- It doesn't matter if the surrounding text causes new aftermatches.
> Do_Something_With (Target);
> end loop;
> end;
>
> Very rarely I get a Storage_Error and segment violation that kills the
> program. Running inside gdb I get this backtrace:
>
> #0 0xb7ddf37c in memcpy () from /lib/tls/i686/cmov/libc.so.6
> #1 0x081b7d8d in ada.strings.fixed.replace_slice ()
> #2 0x081bd6cf in ada.strings.unbounded.replace_slice ()
> #3 0x081d4f5e in gnat.spitbol.patterns.match ()
>
> Unfortunately, address2line doesn't make any valid source lines from these
> addresses, I suppose because the gdb wrapping (but this is just a guess).
>
> If you have used Gnat Spitbol before, could you comment if I'm doing
> something risky? This is with gnat gpl 2006 in linux x86
>
>
Any chance this is a simple matter of blowing the stack someplace?
Compile with -fstack-check and/or try increasing the stack space of the
task that is doing this work.
next prev parent reply other threads:[~2007-01-18 12:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-18 12:33 GNAT Spitbol segmentation fault Alex R. Mosteo
2007-01-18 12:55 ` Jeffrey Creem [this message]
2007-01-18 17:00 ` Alex R. Mosteo
2007-02-01 10:36 ` Alex R. Mosteo
2007-01-18 14:32 ` Georg Bauhaus
2007-01-18 17:00 ` Alex R. Mosteo
2007-01-18 22:31 ` Simon Wright
2007-01-19 9:32 ` Alex R. Mosteo
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