From: Philippe Proulx <eeppeliteloop@gmail.com>
Date: Sat, 29 Aug 2015 22:32:37 +0000 (-0400)
Subject: Add lttng_event_get_exclusion_name*() to liblttng-ctl
X-Git-Tag: v2.8.0-rc1~128
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=f086e50e4e5c70f43f9b0f707078694eadc5ccd5;p=lttng-tools.git

Add lttng_event_get_exclusion_name*() to liblttng-ctl

Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/include/lttng/event.h b/include/lttng/event.h
index a85f0f3b5..bf37a1167 100644
--- a/include/lttng/event.h
+++ b/include/lttng/event.h
@@ -307,6 +307,25 @@ extern int lttng_list_events(struct lttng_handle *handle,
 extern int lttng_event_get_filter_string(struct lttng_event *event,
 		const char **filter_string);
 
+/*
+ * Get the number of exclusion names of a specific LTTng event.
+ *
+ * Returns the number of exclusion names on success, or a negative
+ * LTTng error code on error.
+ */
+extern int lttng_event_get_exclusion_name_count(struct lttng_event *event);
+
+/*
+ * Get an LTTng event's exclusion name at a given index.
+ *
+ * If the call is successful, then the exclusion name string's address
+ * is put in *exclusion_name. The caller does NOT own *exclusion_name.
+ *
+ * Returns 0 on success, or a negative LTTng error code on error.
+ */
+extern int lttng_event_get_exclusion_name(struct lttng_event *event,
+		size_t index, const char **exclusion_name);
+
 /*
  * List the available tracepoints of a specific lttng domain.
  *
diff --git a/src/lib/lttng-ctl/lttng-ctl.c b/src/lib/lttng-ctl/lttng-ctl.c
index 02b3fed4c..c7665922f 100644
--- a/src/lib/lttng-ctl/lttng-ctl.c
+++ b/src/lib/lttng-ctl/lttng-ctl.c
@@ -1817,6 +1817,67 @@ end:
 	return ret;
 }
 
+int lttng_event_get_exclusion_name_count(struct lttng_event *event)
+{
+	int ret;
+	struct lttcomm_event_extended_header *ext_header;
+
+	if (!event) {
+		ret = -LTTNG_ERR_INVALID;
+		goto end;
+	}
+
+	ext_header = event->extended.ptr;
+	if (!ext_header) {
+		/*
+		 * This can happen since the lttng_event structure is
+		 * used for other tasks where this pointer is never set.
+		 */
+		ret = 0;
+		goto end;
+	}
+
+	if (ext_header->nb_exclusions > INT_MAX) {
+		ret = -LTTNG_ERR_OVERFLOW;
+		goto end;
+	}
+	ret = (int) ext_header->nb_exclusions;
+end:
+	return ret;
+}
+
+int lttng_event_get_exclusion_name(struct lttng_event *event,
+		size_t index, const char **exclusion_name)
+{
+	int ret = 0;
+	struct lttcomm_event_extended_header *ext_header;
+	void *at;
+
+	if (!event || !exclusion_name) {
+		ret = -LTTNG_ERR_INVALID;
+		goto end;
+	}
+
+	ext_header = event->extended.ptr;
+	if (!ext_header) {
+		ret = -LTTNG_ERR_INVALID;
+		goto end;
+	}
+
+	if (index >= ext_header->nb_exclusions) {
+		ret = -LTTNG_ERR_INVALID;
+		goto end;
+	}
+
+	at = (void *) ext_header + sizeof(*ext_header);
+	at += ext_header->filter_len;
+	at += index * LTTNG_SYMBOL_NAME_LEN;
+	*exclusion_name = at;
+
+end:
+	return ret;
+}
+
 /*
  * Sets the tracing_group variable with name.
  * This function allocates memory pointed to by tracing_group.