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Re: A new revised patch for dlclose
- To: "H . J . Lu" <hjl at valinux dot com>
- Subject: Re: A new revised patch for dlclose
- From: Andrew Cagney <ac131313 at cygnus dot com>
- Date: Fri, 10 Mar 2000 02:48:23 +1100
- CC: gdb-patches at sourceware dot cygnus dot com
- Organization: Cygnus Solutions
- References: <20000307120800.A27315@valinux.com> <20000307122129.A3568@valinux.com>
"H . J . Lu" wrote:
>
> On Tue, Mar 07, 2000 at 12:08:00PM -0800, H . J . Lu wrote:
> > Here is a revised patch for dlclose. If you take a look at the
> > dynamic linker in glibc 2.1 or above, you will find that it informs
> > gdb about loading/unloading a shared library via an internal debug
> > function, _dl_debug_state (). gdb already handles the loading in
> > handle_inferior_event () with BPSTAT_WHAT_CHECK_SHLIBS and
> > BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK. However, we need also
> > check the unloading event. solib_verify () will be called only when the
> > dynamic linker calls _dl_debug_state (). It shouldn't introduce any
> > overhead. I believe it is on the right track although it may be further
> > optimized.
H.J., I'm curious. Who is Sam Lantinga, they don't show up in GDB's
copyright assignment file.
Andrew