Re: [PATCH, ppc] Fix hw *points for embedded ppc in a threaded environment

[Sergio Durigan Junior <sergiodj at redhat dot com>]

Hey!

Thank for the patch.  One thing I noticed:

On Wednesday, April 17 2013, Luis Machado wrote:

> Index: gdb-head/gdb/ppc-linux-nat.c
> ===================================================================
> --- gdb-head.orig/gdb/ppc-linux-nat.c	2013-04-17 10:24:52.919499117 +0200
> +++ gdb-head/gdb/ppc-linux-nat.c	2013-04-17 11:12:20.731448515 +0200
> @@ -2179,6 +2179,21 @@ ppc_linux_new_thread (struct lwp_info *l
>        for (i = 0; i < max_slots_number; i++)
>  	if (hw_breaks[i].hw_break)
>  	  booke_insert_point (hw_breaks[i].hw_break, tid);

Didn't you forget to delete the previous line?  :-)

> +	  {
> +	    /* The ppc Linux kernel causes a thread to inherit its parent
> +	       thread's debug state, and that includes any hardware
> +	       watchpoints or breakpoints that the parent thread may have set.
> +
> +	       For this reason, the debug state of the new thread is cleared
> +	       before trying to replicate any hardware watchpoints or
> +	       breakpoints contained in other threads.  */
> +
> +	    /* The ppc debug resource accounting is done through "slots".
> +	       Ask the kernel the deallocate this specific *point's slot.  */
> +	    ptrace (PPC_PTRACE_DELHWDEBUG, tid, 0, hw_breaks[i].slot);
> +
> +	    booke_insert_point (hw_breaks[i].hw_break, tid);
> +	  }

-- 
Sergio