X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=probes%2Flttng-ftrace.c;h=bb70df686940df9b00653c86e50f13090a8a2c4a;hb=b3c40230ad700b12c39640d8593aece428a2702b;hp=b8bd344749b201ecec08b6e93ebcba2715fb08f7;hpb=4133fce7c3dfbe61a954001c87931e9785453981;p=lttng-modules.git

diff --git a/probes/lttng-ftrace.c b/probes/lttng-ftrace.c
index b8bd3447..bb70df68 100644
--- a/probes/lttng-ftrace.c
+++ b/probes/lttng-ftrace.c
@@ -1,10 +1,23 @@
 /*
- * (C) Copyright	2009-2011 -
- * 		Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * probes/lttng-ftrace.c
  *
  * LTTng function tracer integration module.
  *
- * Dual LGPL v2.1/GPL v2 license.
+ * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /*
@@ -20,17 +33,17 @@
 #include <linux/module.h>
 #include <linux/ftrace.h>
 #include <linux/slab.h>
-#include "../ltt-events.h"
+#include "../lttng-events.h"
 #include "../wrapper/ringbuffer/frontend_types.h"
 #include "../wrapper/ftrace.h"
 #include "../wrapper/vmalloc.h"
-#include "../ltt-tracer.h"
+#include "../lttng-tracer.h"
 
 static
 void lttng_ftrace_handler(unsigned long ip, unsigned long parent_ip, void **data)
 {
-	struct ltt_event *event = *data;
-	struct ltt_channel *chan = event->chan;
+	struct lttng_event *event = *data;
+	struct lttng_channel *chan = event->chan;
 	struct lib_ring_buffer_ctx ctx;
 	struct {
 		unsigned long ip;
@@ -38,16 +51,21 @@ void lttng_ftrace_handler(unsigned long ip, unsigned long parent_ip, void **data
 	} payload;
 	int ret;
 
-	if (!ACCESS_ONCE(chan->session->active))
+	if (unlikely(!ACCESS_ONCE(chan->session->active)))
 		return;
+	if (unlikely(!ACCESS_ONCE(chan->enabled)))
+		return;
+	if (unlikely(!ACCESS_ONCE(event->enabled)))
+		return;
+
 	lib_ring_buffer_ctx_init(&ctx, chan->chan, event,
-				 sizeof(payload), ltt_alignof(payload), -1);
+				 sizeof(payload), lttng_alignof(payload), -1);
 	ret = chan->ops->event_reserve(&ctx, event->id);
 	if (ret < 0)
 		return;
 	payload.ip = ip;
 	payload.parent_ip = parent_ip;
-	lib_ring_buffer_align_ctx(&ctx, ltt_alignof(payload));
+	lib_ring_buffer_align_ctx(&ctx, lttng_alignof(payload));
 	chan->ops->event_write(&ctx, &payload, sizeof(payload));
 	chan->ops->event_commit(&ctx);
 	return;
@@ -57,7 +75,7 @@ void lttng_ftrace_handler(unsigned long ip, unsigned long parent_ip, void **data
  * Create event description
  */
 static
-int lttng_create_ftrace_event(const char *name, struct ltt_event *event)
+int lttng_create_ftrace_event(const char *name, struct lttng_event *event)
 {
 	struct lttng_event_field *fields;
 	struct lttng_event_desc *desc;
@@ -81,8 +99,8 @@ int lttng_create_ftrace_event(const char *name, struct ltt_event *event)
 	fields[0].name = "ip";
 	fields[0].type.atype = atype_integer;
 	fields[0].type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT;
-	fields[0].type.u.basic.integer.alignment = ltt_alignof(unsigned long) * CHAR_BIT;
-	fields[0].type.u.basic.integer.signedness = is_signed_type(unsigned long);
+	fields[0].type.u.basic.integer.alignment = lttng_alignof(unsigned long) * CHAR_BIT;
+	fields[0].type.u.basic.integer.signedness = lttng_is_signed_type(unsigned long);
 	fields[0].type.u.basic.integer.reverse_byte_order = 0;
 	fields[0].type.u.basic.integer.base = 16;
 	fields[0].type.u.basic.integer.encoding = lttng_encode_none;
@@ -90,8 +108,8 @@ int lttng_create_ftrace_event(const char *name, struct ltt_event *event)
 	fields[1].name = "parent_ip";
 	fields[1].type.atype = atype_integer;
 	fields[1].type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT;
-	fields[1].type.u.basic.integer.alignment = ltt_alignof(unsigned long) * CHAR_BIT;
-	fields[1].type.u.basic.integer.signedness = is_signed_type(unsigned long);
+	fields[1].type.u.basic.integer.alignment = lttng_alignof(unsigned long) * CHAR_BIT;
+	fields[1].type.u.basic.integer.signedness = lttng_is_signed_type(unsigned long);
 	fields[1].type.u.basic.integer.reverse_byte_order = 0;
 	fields[1].type.u.basic.integer.base = 16;
 	fields[1].type.u.basic.integer.encoding = lttng_encode_none;
@@ -115,7 +133,7 @@ struct ftrace_probe_ops lttng_ftrace_ops = {
 
 int lttng_ftrace_register(const char *name,
 			  const char *symbol_name,
-			  struct ltt_event *event)
+			  struct lttng_event *event)
 {
 	int ret;
 
@@ -146,14 +164,14 @@ error:
 }
 EXPORT_SYMBOL_GPL(lttng_ftrace_register);
 
-void lttng_ftrace_unregister(struct ltt_event *event)
+void lttng_ftrace_unregister(struct lttng_event *event)
 {
 	wrapper_unregister_ftrace_function_probe(event->u.ftrace.symbol_name,
 			&lttng_ftrace_ops, event);
 }
 EXPORT_SYMBOL_GPL(lttng_ftrace_unregister);
 
-void lttng_ftrace_destroy_private(struct ltt_event *event)
+void lttng_ftrace_destroy_private(struct lttng_event *event)
 {
 	kfree(event->u.ftrace.symbol_name);
 	kfree(event->desc->fields);