Re: break points for shared libs

[Anitha Boyapati <anithab at sankhya dot com>]

Hi,

On Thu, 7 Dec 2006, Daniel Jacobowitz wrote:

> On Thu, Dec 07, 2006 at 07:40:03PM +0530, Anitha Boyapati wrote:
> > On Thu, 7 Dec 2006, Daniel Jacobowitz wrote:
> > 
> > > On Thu, Dec 07, 2006 at 05:34:29PM +0530, Anitha Boyapati wrote:
> > > >  I want to set breakpoints in shared lib sources while executing another 
> > > >  program.But the symbol is being overridden whenever I use 
> > > >  
> > > >  file test.so
> > > 
> > > Don't use file.  It needs to be automatic or it won't work at all.
> > > 
> > > > warning: shared library handler failed to enable breakpoint
> > > 
> > > This is the problem.  You didn't say what platform you're debugging,
> > > how you're running GDB, or anything else - one of those is to blame.
> >  
> >  Sorry!
> >  gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-20)
> >  This GDB was configured as "i386-redhat-linux-gnu".
> 
> What system are you running GDB on?
> 
> How are you running GDB?
> 
> Please send a transcript of a session which demonstrates the warning.
> 

 Here is the sequence :

------------------------------------------------------------
 (gdb) b child.cc:4
No symbol table is loaded.  Use the "file" command.
(gdb) file libmem.so
Reading symbols from libmem.so...done.
Using host libthread_db library "/lib/tls/libthread_db.so.1".
(gdb) b child.cc:4
Breakpoint 1 at 0xdf8: file child.cc, line 4.
(gdb) run
Starting program: 
/root/libmem.so
Breakpoint 1 at 0x80000df8: file child.cc, line 4.
warning: shared library handler failed to enable breakpoint
-----------------------------------------------------------------

Actually my requirement is to make breakpoints work in a shared library
while debugging another application which uses the above shared library.

The child.cc is the source file for libmem.so
 (g++ -g -shared -o libmem.so child.cc)

Please let me know how can i do this.
  

 

-- 
Regards,
Anitha B,
Sankhya Technologies Private Limited.