[RFA] Set stop_pc when TARGET_WAITKIND_NO_HISTORY

[Michael Snyder]

Yes, you're right -- good catch!

Please commit to branch and trunk.

teawater wrote:
> Hi Michael,
> 
> I try the 20080930 branch and got:
> (gdb) start
> Temporary breakpoint 1 at 0x80483c1: file 1.c, line 20.
> Starting program: /home/teawater/rec/a.out
> 
> Temporary breakpoint 1, main () at 1.c:20
> 20             int     b = 0;
> (gdb) record
> (gdb) n
> 21             int     c = 1;
> (gdb)
> 24              printf ("a = %d b = %d c = %d\n", a, b, c);
> (gdb)
> a = 0 b = 0 c = 1
> 25             b = cool ();
> (gdb) rn
> 
> No more reverse-execution history.
> main () at 1.c:20
> 20             int     b = 0;
> (gdb) n
> Cannot find bounds of current function
> 
> This is because:
>     case TARGET_WAITKIND_NO_HISTORY:
>       /* Reverse execution: target ran out of history info.  */
>       print_stop_reason (NO_HISTORY, 0);
>       stop_stepping (ecs);
>       return;
> 
> This place doesn't set stop_pc but in step_1:
>                   if (find_pc_partial_function (stop_pc, &name,
>                                                 &tp->step_range_start,
>                                                 &tp->step_range_end) == 0)
>                     error (_("Cannot find bounds of current function"));
> 
> So I add code to set stop_pc. I think this bug will affect main tree
> too. So this patch is for both 20080930 branch and main tree.
> 
> 2008-10-19  Hui Zhu  <teawater@gmail.com>
> 
>         * infrun.c (handle_inferior_event): Set "stop_pc" when
>         TARGET_WAITKIND_NO_HISTORY.
> 
> Thanks,
> Hui
> 
> 
> ------------------------------------------------------------------------
> 
> --- a/ChangeLog
> +++ b/ChangeLog
> @@ -1,3 +1,8 @@
> +2008-10-19  Hui Zhu  <teawater@gmail.com>
> +
> +	* infrun.c (handle_inferior_event): Set "stop_pc" when
> +	TARGET_WAITKIND_NO_HISTORY.
> +
>  2008-10-18  Pedro Alves  <pedro@codesourcery.com>
>  
>  	* infrun.c (adjust_pc_after_break): Do nothing if executing in
> --- a/infrun.c
> +++ b/infrun.c
> @@ -2237,6 +2237,7 @@ handle_inferior_event (struct execution_
>  
>      case TARGET_WAITKIND_NO_HISTORY:
>        /* Reverse execution: target ran out of history info.  */
> +      stop_pc = read_pc ();
>        print_stop_reason (NO_HISTORY, 0);
>        stop_stepping (ecs);
>        return;