debugging dynamic link/load code on Linux

debugging dynamic link/load code on Linux

[Jack J]

Hi,

I am new to gdb mailing list.
I have a question and if this list is not appropriate,
please apologize.  I am hoping someone can shed some
light with helpful tips and pointers.

question: How do I set a breakpoint in a module/code
which is dynamically linked/loaded in Linux ?

I tried setting a breaking point (in gdb) after 
dlsym() but, gdb still complains of function not
found.
I did have it compiled with "-g" gcc option.

-- gdb output--

(gdb) b test_routine
Function "test_routine" not defined.
(gdb) l test_routine
Function "test_routine" not defined.

-----

Thanks,



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Re: debugging dynamic link/load code on Linux

[Daniel Jacobowitz]

On Wed, Oct 15, 2003 at 01:10:57PM -0700, Jack J wrote:
> Hi,
> 
> I am new to gdb mailing list.
> I have a question and if this list is not appropriate,
> please apologize.  I am hoping someone can shed some
> light with helpful tips and pointers.
> 
> question: How do I set a breakpoint in a module/code
> which is dynamically linked/loaded in Linux ?
> 
> I tried setting a breaking point (in gdb) after 
> dlsym() but, gdb still complains of function not
> found.
> I did have it compiled with "-g" gcc option.
> 
> -- gdb output--
> 
> (gdb) b test_routine
> Function "test_routine" not defined.
> (gdb) l test_routine
> Function "test_routine" not defined.

Once the library has been loaded you should be able to.  Can you build
a small testcase, and a complete session transcript that show the
problem?

Does "info shared" show the module?

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer