X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Ftrace-ust.c;h=4d39e213326b6ce903e459b6bb243d807051696a;hp=1adda7e82b19b673f93352a921d843e1a5951e68;hb=1cf992b8ff3eb5bf79e0c209f5e50f16b8d220d9;hpb=19a97244f801504a7985eee1b4ecca933f660b4a

diff --git a/src/bin/lttng-sessiond/trace-ust.c b/src/bin/lttng-sessiond/trace-ust.c
index 1adda7e82..4d39e2133 100644
--- a/src/bin/lttng-sessiond/trace-ust.c
+++ b/src/bin/lttng-sessiond/trace-ust.c
@@ -15,7 +15,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#define _GNU_SOURCE
 #define _LGPL_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
@@ -117,12 +116,46 @@ int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key)
 	}
 
 	if (key->exclusion && event->exclusion) {
-		/* Both exclusions exist; check count followed by names. */
-		if (event->exclusion->count != key->exclusion->count ||
-				memcmp(event->exclusion->names, key->exclusion->names,
-					event->exclusion->count * LTTNG_SYMBOL_NAME_LEN) != 0) {
+		size_t i;
+
+		/* Check exclusion counts first. */
+		if (event->exclusion->count != key->exclusion->count) {
 			goto no_match;
 		}
+
+		/* Compare names individually. */
+		for (i = 0; i < event->exclusion->count; ++i) {
+			size_t j;
+		        bool found = false;
+			const char *name_ev =
+				LTTNG_EVENT_EXCLUSION_NAME_AT(
+					event->exclusion, i);
+
+			/*
+			 * Compare this exclusion name to all the key's
+			 * exclusion names.
+			 */
+			for (j = 0; j < key->exclusion->count; ++j) {
+				const char *name_key =
+					LTTNG_EVENT_EXCLUSION_NAME_AT(
+						key->exclusion, j);
+
+				if (!strncmp(name_ev, name_key,
+						LTTNG_SYMBOL_NAME_LEN)) {
+					/* Names match! */
+					found = true;
+					break;
+				}
+			}
+
+			/*
+			 * If the current exclusion name was not found amongst
+			 * the key's exclusion names, then there's no match.
+			 */
+			if (!found) {
+				goto no_match;
+			}
+		}
 	}
 	/* Match. */
 	return 1;
@@ -360,6 +393,39 @@ error:
 	return luc;
 }
 
+/*
+ * Validates an exclusion list.
+ *
+ * Returns 0 if valid, negative value if invalid.
+ */
+static int validate_exclusion(struct lttng_event_exclusion *exclusion)
+{
+	size_t i;
+	int ret = 0;
+
+	assert(exclusion);
+
+	for (i = 0; i < exclusion->count; ++i) {
+		size_t j;
+		const char *name_a =
+			LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i);
+
+		for (j = 0; j < i; ++j) {
+			const char *name_b =
+				LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, j);
+
+			if (!strncmp(name_a, name_b, LTTNG_SYMBOL_NAME_LEN)) {
+				/* Match! */
+				ret = -1;
+				goto end;
+			}
+		}
+	}
+
+end:
+	return ret;
+}
+
 /*
  * Allocate and initialize a ust event. Set name and event type.
  * We own filter_expression, filter, and exclusion.
@@ -376,6 +442,10 @@ struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev,
 
 	assert(ev);
 
+	if (exclusion && validate_exclusion(exclusion)) {
+		goto error;
+	}
+
 	lue = zmalloc(sizeof(struct ltt_ust_event));
 	if (lue == NULL) {
 		PERROR("ust event zmalloc");
@@ -477,7 +547,6 @@ int trace_ust_context_type_event_to_ust(enum lttng_event_context_type type)
 		}
 		break;
 	default:
-		ERR("Invalid UST context");
 		utype = -1;
 		break;
 	}
@@ -537,6 +606,7 @@ struct ltt_ust_context *trace_ust_create_context(
 
 	utype = trace_ust_context_type_event_to_ust(ctx->ctx);
 	if (utype < 0) {
+		ERR("Invalid UST context");
 		return NULL;
 	}