[DTrace-devel] [PATCH 1/2] dtprobed: handle a crashed parser child better

[Kris Van Hees]

On Thu, Jan 16, 2025 at 09:33:31PM +0000, Nick Alcock via DTrace-devel wrote:
> When a parser child crashes and is restarted, its file handles
> might change: we should pick up the new fhes if so.
> 
> Signed-off-by: Nick Alcock <nick.alcock at oracle.com>

Reviewed-by: Kris Van Hees <kris.van.hees at oracle.com>

> ---
>  dtprobed/dtprobed.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/dtprobed/dtprobed.c b/dtprobed/dtprobed.c
> index 86865eb467b67..c0597b7329d37 100644
> --- a/dtprobed/dtprobed.c
> +++ b/dtprobed/dtprobed.c
> @@ -769,7 +769,13 @@ process_dof(pid_t pid, int out, int in, dev_t dev, ino_t inum, dev_t exec_dev,
>  		if (!provider) {
>  			if (tries++ > 1)
>  				goto err;
> +			/*
> +			 * Tidying reopens the parser in and out pipes: catch
> +			 * up with this.
> +			 */
>  			dof_parser_tidy(1);
> +			out = parser_out_pipe;
> +			in = parser_in_pipe;
>  			continue;
>  		}
>  		if (provider->type != DIT_PROVIDER && provider->type != DIT_EOF)
> -- 
> 2.47.1.279.g84c5f4e78e
> 
> 
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