Re: problem printing enums as integers with dwarf2

[Kevin Nomura <nomura at netapp dot com>]

Thanks for looking at it!

Kevin


Date: 10 Nov 2003 23:58:00 -0000
To: nomura@netapp.com
From: gdb-gnats@sources.redhat.com
Subject: Re: exp/1445: C enum prints 129 as -127 with dwarf-2
Reply-To: gdb-gnats@sources.redhat.com, nobody@sources.redhat.com
In-Reply-To: Your message of 10 Nov 2003 23:48:04 -0000
        <20031110234804.11729.qmail@sources.redhat.com>
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Thank you very much for your problem report.
It has the internal identification `exp/1445'.
The individual assigned to look at your
report is: unassigned.
 
>Category:       exp                                                            
>Responsible:    unassigned                                                     
>Synopsis:       C enum prints 129 as -127 with dwarf-2                         
>Arrival-Date:   Mon Nov 10 23:58:00 UTC 2003                                   
 
 



On Mon, Nov 10, 2003 at 06:32:35PM -0500, Jim Blandy wrote:
> 
> Not known to me, at least.  Please go ahead and file a bug for this,
> and I'll take it.
> 
> Kevin Nomura <nomura@netapp.com> writes:
> > Before filing a bug I'd like to check if I'm missing
> > something obvious.  A C enum is defined with elements
> > x0, x1, ..., x999 starting at 0 and incrementing naturally
> > with no "=" reassignments.  It is compiled on Linux redhat 8
> > (for example) which uses dwarf2 by default: gcc -g enum.c
> > 
> > x129 is printed as an integer:
> > 
> > (gdb) p/d x129
> > $2 = -127
> > 
> > I expected 129.
> > 
> > Compile with stabs explicitly and get the expected behaviour:
> > 
> > [siml4]$ gcc -gstabs enum.c
> > [siml4]$ gdb a.out
> > GNU gdb Red Hat Linux (5.2.1-4)
> > Copyright 2002 Free Software Foundation, Inc.
> > GDB is free software, covered by the GNU General Public License, and you are
> > welcome to change it and/or distribute copies of it under certain conditions.
> > Type "show copying" to see the conditions.
> > There is absolutely no warranty for GDB.  Type "show warranty" for details.
> > This GDB was configured as "i386-redhat-linux"...
> > (gdb) p x129
> > $1 = x129
> > (gdb) p/d x129
> > $2 = 129
> > (gdb) 
> > 
> > Here is a testcase generator in perl to declare the 1000 element enum.
> > 
> > 
> > 
> > #!/usr/bin/perl -w
> > use strict
> > 
> > print "enum e {\n";
> > 
> > for ($i=0; $i<1000; $i++) { printf "\tx%d,\n", $i }
> > print <<EOF;
> > };
> > 
> > main()
> > {
> >         printf ("%d\\n", x129);
> > }
> > EOF