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Re: [rfc] Preferred thread event reporting: Linux native target
On Fri, Aug 15, 2008 at 11:54:31PM +0100, Pedro Alves wrote:
> > > For my series to go in, every target much register at least the main
> > > thread in GDB's thread tables, and as it happens, I think AIX
> > > is the only target I don't have covered, or that I know of
> > > no one covering.
> >
> > I can test AIX if necessary. Do you have a patch?
>
> I stratched my head quite a bit staring at aix-thread.c/sync_threadlists
> and its use of ptid_cmp. I still can't tell if/what I should do there.
> Also, I can't tell if rs6000_wait can ever return a ptid
> different from pid_to_ptid(main_process_pid), (or -1).
>
> Basically, I need to:
>
> 1) make sure the core never gets a thread related event
> that corresponds to a thread the core doesn't know
> about yet.
>
> 2) #1 implies that every target should register the main
> thread, even when debugging a single-threaded app.
> rs6000-nat.c, being a ptrace based target, already has that
> covered by these:
> http://sourceware.org/ml/gdb-patches/2008-08/msg00170.html
> http://sourceware.org/ml/gdb-patches/2008-08/msg00171.html
>
> 3) #2 implies that a thread_stratum layer should decorate the
> main thread's ptid with thread id info, instead of adding it
> again. That's thread_change_ptid from:
> http://sourceware.org/ml/gdb-patches/2008-08/msg00170.html
Ulrich, I don't suppose I could ask you to do this? Pedro's already
done a heroic job fixing up other targets... Pedro, I know you started
looking at AIX; maybe you have a patch that at least points out the
places that need to change?
--
Daniel Jacobowitz
CodeSourcery