X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=probes%2Flttng-ftrace.c;h=50675a4fa6096ead0a9191ada6642cc335abeffc;hb=refs%2Fheads%2Fstable-2.9;hp=2a939216ef5e3233edc484b66dcb288837f42a99;hpb=a90917c3f8c4ed79117f1caa333b29a2108084ec;p=lttng-modules.git

diff --git a/probes/lttng-ftrace.c b/probes/lttng-ftrace.c
index 2a939216..50675a4f 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
  */
 
 /*
@@ -20,16 +33,59 @@
 #include <linux/module.h>
 #include <linux/ftrace.h>
 #include <linux/slab.h>
-#include "../lttng-events.h"
-#include "../wrapper/ringbuffer/frontend_types.h"
-#include "../wrapper/ftrace.h"
-#include "../wrapper/vmalloc.h"
-#include "../lttng-tracer.h"
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/ftrace.h>
+#include <wrapper/vmalloc.h>
+#include <lttng-tracer.h>
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0))
+static
+void lttng_ftrace_handler(unsigned long ip, unsigned long parent_ip,
+		struct trace_array *tr, struct ftrace_probe_ops *ops,
+		void *data)
+{
+	struct lttng_event *event = data;
+	struct lttng_probe_ctx lttng_probe_ctx = {
+		.event = event,
+		.interruptible = !irqs_disabled(),
+	};
+	struct lttng_channel *chan = event->chan;
+	struct lib_ring_buffer_ctx ctx;
+	struct {
+		unsigned long ip;
+		unsigned long parent_ip;
+	} payload;
+	int ret;
+
+	if (unlikely(!READ_ONCE(chan->session->active)))
+		return;
+	if (unlikely(!READ_ONCE(chan->enabled)))
+		return;
+	if (unlikely(!READ_ONCE(event->enabled)))
+		return;
 
+	lib_ring_buffer_ctx_init(&ctx, chan->chan, &lttng_probe_ctx,
+				 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, lttng_alignof(payload));
+	chan->ops->event_write(&ctx, &payload, sizeof(payload));
+	chan->ops->event_commit(&ctx);
+	return;
+}
+#else
 static
 void lttng_ftrace_handler(unsigned long ip, unsigned long parent_ip, void **data)
 {
 	struct lttng_event *event = *data;
+	struct lttng_probe_ctx lttng_probe_ctx = {
+		.event = event,
+		.interruptible = !irqs_disabled(),
+	};
 	struct lttng_channel *chan = event->chan;
 	struct lib_ring_buffer_ctx ctx;
 	struct {
@@ -38,14 +94,14 @@ void lttng_ftrace_handler(unsigned long ip, unsigned long parent_ip, void **data
 	} payload;
 	int ret;
 
-	if (unlikely(!ACCESS_ONCE(chan->session->active)))
+	if (unlikely(!READ_ONCE(chan->session->active)))
 		return;
-	if (unlikely(!ACCESS_ONCE(chan->enabled)))
+	if (unlikely(!READ_ONCE(chan->enabled)))
 		return;
-	if (unlikely(!ACCESS_ONCE(event->enabled)))
+	if (unlikely(!READ_ONCE(event->enabled)))
 		return;
 
-	lib_ring_buffer_ctx_init(&ctx, chan->chan, event,
+	lib_ring_buffer_ctx_init(&ctx, chan->chan, &lttng_probe_ctx,
 				 sizeof(payload), lttng_alignof(payload), -1);
 	ret = chan->ops->event_reserve(&ctx, event->id);
 	if (ret < 0)
@@ -57,6 +113,7 @@ void lttng_ftrace_handler(unsigned long ip, unsigned long parent_ip, void **data
 	chan->ops->event_commit(&ctx);
 	return;
 }
+#endif
 
 /*
  * Create event description
@@ -87,7 +144,7 @@ int lttng_create_ftrace_event(const char *name, struct lttng_event *event)
 	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 = lttng_alignof(unsigned long) * CHAR_BIT;
-	fields[0].type.u.basic.integer.signedness = is_signed_type(unsigned long);
+	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;
@@ -96,7 +153,7 @@ int lttng_create_ftrace_event(const char *name, struct lttng_event *event)
 	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 = lttng_alignof(unsigned long) * CHAR_BIT;
-	fields[1].type.u.basic.integer.signedness = is_signed_type(unsigned long);
+	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;
@@ -186,3 +243,7 @@ module_exit(lttng_ftrace_exit)
 MODULE_LICENSE("GPL and additional rights");
 MODULE_AUTHOR("Mathieu Desnoyers");
 MODULE_DESCRIPTION("Linux Trace Toolkit Ftrace Support");
+MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
+	__stringify(LTTNG_MODULES_MINOR_VERSION) "."
+	__stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)
+	LTTNG_MODULES_EXTRAVERSION);