/*
- * (C) Copyright 2009-2011 -
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * lttng-context-prio.c
*
* LTTng priority context.
*
- * 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
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/sched.h>
-#include "ltt-events.h"
-#include "wrapper/ringbuffer/frontend_types.h"
-#include "wrapper/vmalloc.h"
-#include "ltt-tracer.h"
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <wrapper/kallsyms.h>
+#include <lttng-tracer.h>
static
int (*wrapper_task_prio_sym)(struct task_struct *t);
int wrapper_task_prio_init(void)
{
- wrapper_task_prio_sym = (void *) kallsyms_lookup_name("task_prio");
+ wrapper_task_prio_sym = (void *) kallsyms_lookup_funcptr("task_prio");
if (!wrapper_task_prio_sym) {
printk(KERN_WARNING "LTTng: task_prio symbol lookup failed.\n");
return -EINVAL;
{
size_t size = 0;
- size += lib_ring_buffer_align(offset, ltt_alignof(int));
+ size += lib_ring_buffer_align(offset, lttng_alignof(int));
size += sizeof(int);
return size;
}
static
void prio_record(struct lttng_ctx_field *field,
struct lib_ring_buffer_ctx *ctx,
- struct ltt_channel *chan)
+ struct lttng_channel *chan)
{
int prio;
prio = wrapper_task_prio_sym(current);
- lib_ring_buffer_align_ctx(ctx, ltt_alignof(prio));
+ lib_ring_buffer_align_ctx(ctx, lttng_alignof(prio));
chan->ops->event_write(ctx, &prio, sizeof(prio));
}
+static
+void prio_get_value(struct lttng_ctx_field *field,
+ struct lttng_probe_ctx *lttng_probe_ctx,
+ union lttng_ctx_value *value)
+{
+ value->s64 = wrapper_task_prio_sym(current);
+}
+
int lttng_add_prio_to_ctx(struct lttng_ctx **ctx)
{
struct lttng_ctx_field *field;
field = lttng_append_context(ctx);
if (!field)
return -ENOMEM;
+ if (lttng_find_context(*ctx, "prio")) {
+ lttng_remove_context_field(ctx, field);
+ return -EEXIST;
+ }
field->event_field.name = "prio";
field->event_field.type.atype = atype_integer;
field->event_field.type.u.basic.integer.size = sizeof(int) * CHAR_BIT;
- field->event_field.type.u.basic.integer.alignment = ltt_alignof(int) * CHAR_BIT;
- field->event_field.type.u.basic.integer.signedness = is_signed_type(int);
+ field->event_field.type.u.basic.integer.alignment = lttng_alignof(int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(int);
field->event_field.type.u.basic.integer.reverse_byte_order = 0;
field->event_field.type.u.basic.integer.base = 10;
field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
field->get_size = prio_get_size;
field->record = prio_record;
+ field->get_value = prio_get_value;
+ lttng_context_update(*ctx);
wrapper_vmalloc_sync_all();
return 0;
}
EXPORT_SYMBOL_GPL(lttng_add_prio_to_ctx);
-
-MODULE_LICENSE("GPL and additional rights");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Linux Trace Toolkit Priority Context");