gdb/2009: Segmentation faults on AMD64

Jeroen Dekkers jeroen@vrijschrift.org
Sun Oct 16 21:28:00 GMT 2005


The following reply was made to PR gdb/2009; it has been noted by GNATS.

From: Jeroen Dekkers <jeroen@vrijschrift.org>
To: Jim Blandy <jimb@redhat.com>
Cc: gdb-gnats@sources.redhat.com,
	alvaro@alobbs.com,
	gdb-patches@sources.redhat.com
Subject: Re: gdb/2009: Segmentation faults on AMD64
Date: Sun, 16 Oct 2005 23:21:59 +0200

 At Sun, 16 Oct 2005 12:51:12 -0700,
 Jim Blandy wrote:
 > 
 > 
 > Jeroen Dekkers <jeroen@dekkers.cx> writes:
 > > I debugged this segfault and it is caused by incorrect debug
 > > information generated by GCC on AMD64, see http://gcc.gnu.org/PR24400.
 > > The problem is that the filenumbers in the .debug_macinfo arex
 > > wrong. They jump from 0xf to 0x11, skipping 0x10, so the last filename
 > > has a number which isn't in the filename table.
 > >
 > > GDB blindly uses the number as index into the filename table,
 > > resulting in a segfault. The following patch adds a check whether the
 > > index isn't bigger than the size of the table.
 > 
 > Please try this patch:
 > 
 > http://sourceware.org/ml/gdb-patches/2005-09/msg00236.html
 
 It works fine here. Thanks!
 
 Jeroen Dekkers



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