This is the mail archive of the
gdb-patches@sourceware.org
mailing list for the GDB project.
Re: [3/7] Adjust the bsd-uthread target
On Fri, Aug 08, 2008 at 11:41:23PM +0100, Pedro Alves wrote:
> The "exited" state is what you get *after* you delete_thread the current
> thread (inferior_ptid). We don't delete the thread from the thread list
> in that case, but instead tag it as "exited". It means the thread list
> is still holding reference to a thread that has already exited.
> If you're seeing an event with a ptid equal to an "exited" thread,
> this is the OS reusing the ptid, but, it's a new thread, which
> should get a new gdb thread id, so things like thread
> specific breakpoints don't think this was the same thread, both the
> CLI user or MI see a "new thread event", etc. add_thread handles
> that case internally. This means it is now safe to delete_thread
> (inferior_ptid), regarding context-switching, and infrun state. It
> wasn't a couple of weeks ago.
How many of the call sites for in_thread_list want to see exited
threads? Maybe there should be another predicate (I'd suggest
thread_alive except target_thread_alive would confuse things...)
--
Daniel Jacobowitz
CodeSourcery