[Bug breakpoints/10963] New: Cannot set breakpoints on symbols containing periods in name

[Bug breakpoints/10963] New: Cannot set breakpoints on symbols containing periods in name

[zonena at cs dot rpi dot edu]

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

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[Bug breakpoints/10963] Cannot set breakpoints on symbols containing periods in name

[zonena at cs dot rpi dot edu]

------- Additional Comments From zonena at cs dot rpi dot edu  2009-11-15 03:51 -------
Also reproducible with the same application on gdb 6.8 on "Gentoo Base System
version 1.12.1"

-- 


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

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[Bug breakpoints/10963] Cannot set breakpoints on symbols containing periods in name

[sergiodj at redhat dot com]

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

Sergio Durigan Junior <sergiodj at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |sergiodj at redhat dot com
         Resolution|                            |WORKSFORME

--- Comment #3 from Sergio Durigan Junior <sergiodj at redhat dot com> 2012-08-24 06:47:57 UTC ---
I took your example code, and managed to generate a minimal binary with it. 
Then, with the latest GDB as of today, I managed to put a breakpoint at the
specified location.

(gdb) b printSector
printSector              printSector.printLittle  
(gdb) b printSector.printLittle
Breakpoint 1 at 0x400085

I am closing this bug as WORKSFORME.  Please feel free to reopen if you still
see the issue.

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[Bug breakpoints/10963] Cannot set breakpoints on symbols containing periods in name

[tromey at redhat dot com]

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

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at redhat dot com

--- Comment #2 from Tom Tromey <tromey at redhat dot com> 2011-08-17 15:29:53 UTC ---
Did you try surrounding the symbol name with single quotes?

Also, can you upload a simple test case?

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