[lttng-dev] [PATCH lttng-tools v2] Fix: update apps on untrack only when session is active

[Jérémie Galarneau]

Merged in master and stable-2.11.

Thanks!
Jérémie

On Mon, Nov 18, 2019 at 03:12:20PM -0500, Jonathan Rajotte wrote:
> This mimics what is done on the track side.
> 
> Fixes #1210
> 
> Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien at efficios.com>
> ---
> 
> Used wrong issue number.
> 
> ---
>  src/bin/lttng-sessiond/trace-ust.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/src/bin/lttng-sessiond/trace-ust.c b/src/bin/lttng-sessiond/trace-ust.c
> index 486b53d30..a6c0c04ad 100644
> --- a/src/bin/lttng-sessiond/trace-ust.c
> +++ b/src/bin/lttng-sessiond/trace-ust.c
> @@ -922,6 +922,7 @@ end:
>  int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid)
>  {
>  	int retval = LTTNG_OK;
> +	bool should_update_apps = false;
>  
>  	if (pid == -1) {
>  		/* Create empty tracker, replace old tracker. */
> @@ -938,7 +939,7 @@ int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid)
>  		fini_pid_tracker(&tmp_tracker);
>  
>  		/* Remove session from all applications */
> -		ust_app_global_update_all(session);
> +		should_update_apps = true;
>  	} else {
>  		int ret;
>  		struct ust_app *app;
> @@ -957,9 +958,12 @@ int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid)
>  		/* Remove session from application. */
>  		app = ust_app_find_by_pid(pid);
>  		if (app) {
> -			ust_app_global_update(session, app);
> +			should_update_apps = true;
>  		}
>  	}
> +	if (should_update_apps && session->active) {
> +		ust_app_global_update_all(session);
> +	}
>  end:
>  	return retval;
>  }
> -- 
> 2.17.1
>