Breakpoint in object destructor

Breakpoint in object destructor

[Bloch, Jack]

We are trying to set a breakpoint in a destructor. this does not seem to
work. Running GDB 5.1.1 on a SuSE 2.4 Kernel. The breakpoint gets set, but
it never fires.

Re: Breakpoint in object destructor

[Michael Chastain]

"Bloch, Jack" <jack.bloch@siemens.com> wrote:
> We are trying to set a breakpoint in a destructor. this does not seem to
> work. Running GDB 5.1.1 on a SuSE 2.4 Kernel. The breakpoint gets set, but
> it never fires.
>

What compiler are you using to build the program that you are compiling?

If you are using gcc 3.X, this is a known, unfixed problem.
See the PROBLEMS file in a recent release of gdb (like gdb 6.2)
for an explanation.  Briefly: gcc 3.X emits two or three object code
functions for each destructor; gdb doesn't understand this;
so gdb puts a breakpoint in just one copy.

Michael C

RE: Breakpoint in object destructor

[Bloch, Jack]

Yes,  We are using gcc 3.2

-----Original Message-----
From: gdb-owner@sources.redhat.com
[mailto:gdb-owner@sources.redhat.com]On Behalf Of Michael Chastain
Sent: Wednesday, August 04, 2004 9:51 AM
To: Bloch, Jack; gdb@sources.redhat.com
Cc: Benitez, Rafael
Subject: Re: Breakpoint in object destructor


"Bloch, Jack" <jack.bloch@siemens.com> wrote:
> We are trying to set a breakpoint in a destructor. this does not seem to
> work. Running GDB 5.1.1 on a SuSE 2.4 Kernel. The breakpoint gets set, but
> it never fires.
>

What compiler are you using to build the program that you are compiling?

If you are using gcc 3.X, this is a known, unfixed problem.
See the PROBLEMS file in a recent release of gdb (like gdb 6.2)
for an explanation.  Briefly: gcc 3.X emits two or three object code
functions for each destructor; gdb doesn't understand this;
so gdb puts a breakpoint in just one copy.

Michael C

Re: Breakpoint in object destructor

[Michael Chastain]

You could try this patch:

  ftp://ftp.shout.net/pub/users/mec/gdb/ctor-dtor-base.patch

You'll need to start with a more recent version of gdb than gdb 5.1.1,
like gdb 6.1.1 or gdb 6.2.  Read the doco (which is useful anyways),
apply the patch, build gdb, and see if you like it.

Michael C