Re: [PATCH] Conditionally restore displaced stepping state after fork.

[John Baldwin <jhb@FreeBSD.org>]

On 5/31/21 9:15 AM, John Baldwin wrote:
> diff --git a/gdb/infrun.c b/gdb/infrun.c
> index e9624d2a9b..6fd077796f 100644
> --- a/gdb/infrun.c
> +++ b/gdb/infrun.c
> @@ -5496,7 +5496,8 @@ handle_inferior_event (struct execution_control_state *ecs)
>   	/* If this is a fork (child gets its own address space copy) and some
>   	   displaced step buffers were in use at the time of the fork, restore
>   	   the displaced step buffer bytes in the child process.  */
> -	if (ecs->ws.kind == TARGET_WAITKIND_FORKED)
> +	if (ecs->ws.kind == TARGET_WAITKIND_FORKED
> +	    && gdbarch_supports_displaced_stepping (gdbarch))
>   	  gdbarch_displaced_step_restore_all_in_ptid
>   	    (gdbarch, parent_inf, ecs->ws.value.related_pid);

This appears to be a regression from 187b041e2514827b9d86190ed2471c4c7a352874
where previously stepping was only cleared from a single thread if it had
a stepping buffer (which implicitly was only true if the gdbarch supported
displaced stepping).

-- 
John Baldwin