Implement PID tracker content listing

[lttng-tools.git] / src / bin / lttng-sessiond / main.c

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index 966f609177ad0b28104de59f827ec73f7101de24..b2a8f555c5fc072b39e1e922a5eef84a2b1b8f43 100644 (file)
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -2960,6 +2960,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int sock,
        case LTTNG_LIST_CHANNELS:
        case LTTNG_LIST_EVENTS:
        case LTTNG_LIST_SYSCALLS:
+       case LTTNG_LIST_TRACKER_PIDS:
                break;
        default:
                /* Setup lttng message with no payload */
@@ -3495,6 +3496,38 @@ skip_domain:
                ret = LTTNG_OK;
                break;
        }
+       case LTTNG_LIST_TRACKER_PIDS:
+       {
+               int32_t *pids = NULL;
+               ssize_t nr_pids;
+
+               nr_pids = cmd_list_tracker_pids(cmd_ctx->session,
+                               cmd_ctx->lsm->domain.type, &pids);
+               if (nr_pids < 0) {
+                       /* Return value is a negative lttng_error_code. */
+                       ret = -nr_pids;
+                       goto error;
+               }
+
+               /*
+                * Setup lttng message with payload size set to the event list size in
+                * bytes and then copy list into the llm payload.
+                */
+               ret = setup_lttng_msg(cmd_ctx, sizeof(int32_t) * nr_pids);
+               if (ret < 0) {
+                       free(pids);
+                       goto setup_error;
+               }
+
+               /* Copy event list into message payload */
+               memcpy(cmd_ctx->llm->payload, pids,
+                               sizeof(int) * nr_pids);
+
+               free(pids);
+
+               ret = LTTNG_OK;
+               break;
+       }
        case LTTNG_SET_CONSUMER_URI:
        {
                size_t nb_uri, len;