c++/1023: setting a breakpoint on C++ member functions

[zeitler at lucent dot com]

>Number:         1023
>Category:       c++
>Synopsis:       setting a breakpoint on C++ member functions
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 03 14:08:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Klaus Zeitler (zeitler@lucent.com)
>Release:        unknown-1.0
>Organization:
>Environment:
Solaris 5.8 and Linux SuSE 7.2
>Description:
gdb 5.0 and 5.2 both don't allow me to set breakpoints on 
some member functions (generated with g++ 2.8.1 or 2.95.3)
e.g.

------------ snip ---------

class myClass
{
  public:
    myClass() {};
    ~myClass() {};
    void performUnblocking( short int cell_index );
    void performBlocking( int cell_index );
};

void myClass::performUnblocking( short int cell_index ) {}

void myClass::performBlocking( int cell_index ) {}

------------ snip ---------


b myClass::performUnblocking works
but myClass::performBlocking doesn't.


nm show the following names for these 2 functions:

08048500 T performBlocking__7myClassi
080484e0 T performUnblocking__7myClasss


I observe the same behavior on Solaris 5.8 and under Linux 
SuSE 7.2. I know I can set a breakpoint via the mangled
names or use completion (with Tab) but we're using gdb via
another tool that sets the breakpoints
automatically with the syntax above.


I don't know if this is a g++ or a gdb problem. g++ 3.0.4
generates mangled names that look slightly different and
setting breakpoints on these functions works just fine.

00010770 T _ZN7myClass15performBlockingEi
0001075c T _ZN7myClass17performUnblockingEs



Unfortunately the set of tools we use (vxworks Tornado,
Objectime) and other project restrictions don't allow as
to simply switch to a new g++ compiler.


Is there some workaround or gdb patch for this problem?
I appreciate any help.
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: