lin-lwp and exiting threads

[Daniel Jacobowitz <drow@mvista.com>]

Hi Jeff,

I'm doing some work in lin-lwp.c and I saw this bit you recently committed:

+      /* Check if the current LWP has previously exited.  For nptl threads,
+         there is no exit signal issued for LWPs that are not the
+         main thread so we should check whenever the thread is stopped.  */
+      if (!lin_lwp_thread_alive (lp->ptid))
+       {
+         if (in_thread_list (lp->ptid))
+           {
+             /* Core GDB cannot deal with us deleting the current
+                thread.  */
+             if (!ptid_equal (lp->ptid, inferior_ptid))
+               delete_thread (lp->ptid);
+             printf_unfiltered ("[%s exited]\n",
+                                target_pid_to_str (lp->ptid));
+           }
+         if (debug_lin_lwp)
+           fprintf_unfiltered (gdb_stdlog,
+                               "SWC: %s already exited.\n",
                                target_pid_to_str (lp->ptid));


This is right after waitpid has returned a non-exiting stopped status for
lp->ptid.  Were you just being thorough, or do you have some reason to
believe that waitpid would ever return WIFSTOPPED (status) and yet the
thread would be dead?

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer