X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Ftrace-kernel.c;h=a5c215fae98a068f359c0bf182e307a693dc9244;hp=990684be918db721a36b8265813b4d8bdcb38cb7;hb=bd722d76b035766511f0b329f9bbaa2f4180c4ed;hpb=5d2e1e66a968d9e555f9b8b00d0589ebfaf3de32

diff --git a/src/bin/lttng-sessiond/trace-kernel.c b/src/bin/lttng-sessiond/trace-kernel.c
index 990684be9..a5c215fae 100644
--- a/src/bin/lttng-sessiond/trace-kernel.c
+++ b/src/bin/lttng-sessiond/trace-kernel.c
@@ -38,6 +38,13 @@ struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
 	assert(session);
 	assert(name);
 
+	/*
+	 * If we receive an empty string for channel name, it means the
+	 * default channel name is requested.
+	 */
+	if (name[0] == '\0')
+		name = DEFAULT_CHANNEL_NAME;
+
 	DBG("Trying to find channel %s", name);
 
 	cds_list_for_each_entry(chan, &session->channel_list.head, list) {
@@ -77,7 +84,7 @@ struct ltt_kernel_event *trace_kernel_get_event_by_name(
  *
  * Return pointer to structure or NULL.
  */
-struct ltt_kernel_session *trace_kernel_create_session(char *path)
+struct ltt_kernel_session *trace_kernel_create_session(void)
 {
 	struct ltt_kernel_session *lks = NULL;
 
@@ -109,25 +116,6 @@ struct ltt_kernel_session *trace_kernel_create_session(char *path)
 	 */
 	lks->tmp_consumer = NULL;
 
-	if (*path != '\0') {
-		int ret;
-
-		/* Use the default consumer output which is the tracing session path. */
-		ret = snprintf(lks->consumer->dst.trace_path, PATH_MAX,
-				"%s" DEFAULT_KERNEL_TRACE_DIR, path);
-		if (ret < 0) {
-			PERROR("snprintf consumer trace path");
-			goto error;
-		}
-
-		/* Set session path */
-		ret = asprintf(&lks->trace_path, "%s" DEFAULT_KERNEL_TRACE_DIR, path);
-		if (ret < 0) {
-			PERROR("asprintf kernel traces path");
-			goto error;
-		}
-	}
-
 	return lks;
 
 error:
@@ -158,10 +146,21 @@ struct ltt_kernel_channel *trace_kernel_create_channel(
 	lkc->channel = zmalloc(sizeof(struct lttng_channel));
 	if (lkc->channel == NULL) {
 		PERROR("lttng_channel zmalloc");
+		free(lkc);
 		goto error;
 	}
 	memcpy(lkc->channel, chan, sizeof(struct lttng_channel));
 
+	/*
+	 * If we receive an empty string for channel name, it means the
+	 * default channel name is requested.
+	 */
+	if (chan->name[0] == '\0') {
+		strncpy(lkc->channel->name, DEFAULT_CHANNEL_NAME,
+			sizeof(lkc->channel->name));
+	}
+	lkc->channel->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
+
 	lkc->fd = -1;
 	lkc->stream_count = 0;
 	lkc->event_count = 0;
@@ -209,7 +208,6 @@ struct ltt_kernel_event *trace_kernel_create_event(struct lttng_event *ev)
 		attr->instrumentation = LTTNG_KERNEL_KRETPROBE;
 		attr->u.kretprobe.addr = ev->attr.probe.addr;
 		attr->u.kretprobe.offset = ev->attr.probe.offset;
-		attr->u.kretprobe.offset = ev->attr.probe.offset;
 		strncpy(attr->u.kretprobe.symbol_name,
 				ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN);
 		attr->u.kretprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
@@ -439,6 +437,8 @@ void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata)
 
 /*
  * Cleanup kernel session structure
+ *
+ * Should *NOT* be called with RCU read-side lock held.
  */
 void trace_kernel_destroy_session(struct ltt_kernel_session *session)
 {
@@ -476,6 +476,5 @@ void trace_kernel_destroy_session(struct ltt_kernel_session *session)
 	consumer_destroy_output(session->consumer);
 	consumer_destroy_output(session->tmp_consumer);
 
-	free(session->trace_path);
 	free(session);
 }