From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gdb-prs-return-7490-listarch-gdb-prs=sources.redhat.com@sourceware.org>
Received: (qmail 10220 invoked by alias); 15 Nov 2009 03:44:49 -0000
Received: (qmail 10205 invoked by uid 48); 15 Nov 2009 03:44:46 -0000
Date: Sun, 15 Nov 2009 03:44:00 -0000
From: "zonena at cs dot rpi dot edu" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Message-ID: <20091115034445.10963.zonena@cs.rpi.edu>
Reply-To: sourceware-bugzilla@sourceware.org
Subject: [Bug breakpoints/10963] New: Cannot set breakpoints on symbols containing periods in name
X-Bugzilla-Reason: CC
Mailing-List: contact gdb-prs-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <gdb-prs.sourceware.org>
List-Subscribe: <mailto:gdb-prs-subscribe@sourceware.org>
List-Archive: <http://sourceware.org/ml/gdb-prs/>
List-Post: <mailto:gdb-prs@sourceware.org>
List-Help: <mailto:gdb-prs-help@sourceware.org>, <http://sourceware.org/lists.html#faqs>
Sender: gdb-prs-owner@sourceware.org
X-SW-Source: 2009-q4/txt/msg00241.txt.bz2

When debugging an application written in amd64 assembly language (compiled with
NASM), I was unable to set breakpoints on labels local to a function which had
periods in their names.

GDB versions tested:
7.0-ubuntu on Ubuntu 9.10 amd64
6.8-debian on Ubuntu 9.04 amd64

Example source:
global printSector
printSector:
  ;code omitted
  cmp rax, rbx
  je .printLittle
  ;code here

.printLittle:
  ;code omitted
  ret

When single stepping this function I was unable to set a breakpoint at the
printLittle label.

$ nm homework6 | grep printLittle
0000000000401bb1 t printSector.printLittle

(gdb) break printSector.printLittle
Can't find member of namespace, class, struct, or union named
"printSector.printLittle"
Hint: try 'printSector.printLittle<TAB> or 'printSector.printLittle<ESC-?>
(Note leading single quote.)
Make breakpoint pending on future shared library load? (y or [n]) 

Tab completion:
(gdb) break printSector
printSector                   printSector.printBig         
printSector.printLittle       printSector.printdirLoop      
printSector.donePrinting      printSector.printDirectory   
printSector.printRegular      printSector.printdirLoopNext  

The only workaround I have found to date is to use nm to locate the address of
the target label and break at the address.

-- 
           Summary: Cannot set breakpoints on symbols containing periods in
                    name
           Product: gdb
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: breakpoints
        AssignedTo: unassigned at sourceware dot org
        ReportedBy: zonena at cs dot rpi dot edu
                CC: gdb-prs at sourceware dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=10963

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.