Re: warning: Unable to find dynamic linker breakpoint function

[Daniel Jacobowitz <drow@false.org>]

On Thu, Dec 30, 2004 at 08:35:59PM -0400, Adam Richard wrote:
> Quoting Daniel Jacobowitz <drow@false.org>:
> 
> > On Wed, Dec 29, 2004 at 05:33:04PM -0400, Adam Richard wrote:
> > > I wonder if someone knows what the following warning means?  It appears whenever I
> > use
> > > the "run" command to start my program:
> > > 
> > > (gdb) run
> > > Starting program: /home/adam/programming/programs/meals/meals
> > > warning: Unable to find dynamic linker breakpoint function.
> > > GDB will be unable to debug shared library initializers
> > > and track explicitly loaded dynamic code.
> > > 
> > > I found a few posts related to it but few people seem to know what the warning
> > message
> > > itself means.
> > 
> > It means exactly what it says - GDB could not set the breakpoint that
> > it uses for tracking things like dlopen().
> > 
> > I can't guess at causes, since you didn't tell us what your platform
> > is.
> 
> Actually, the error message isn't really clear - I just looked up what dlopen does, but
> I don't see what it has to do with breakpoints.  As to my platform, I'm using Gentoo

Nothing, on its own.  GDB uses a breakpoint to be able to support
debugging programs which use dlopen.

> Linux, kernel 2.6.9, on an AMD Athlon XP processor.  I read somewhere that it might
> have to do with a stripped gdb but I don't understand why I can't have a stripped gdb
> so I'm hoping for an explanation.

Not a stripped GDB, a stripped dynamic linker (/lib/ld-linux.so.2).

-- 
Daniel Jacobowitz