linux_kernel/tools/lib/traceevent/plugin_hrtimer.c

/*
 * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
 * Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * This program 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;
 * version 2.1 of the License (not later!)
 *
 * This program 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 program; if not,  see <http://www.gnu.org/licenses>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "event-parse.h"
#include "trace-seq.h"

static int timer_expire_handler(struct trace_seq *s,
				struct tep_record *record,
				struct tep_event_format *event, void *context)
{
	trace_seq_printf(s, "hrtimer=");

	if (tep_print_num_field(s, "0x%llx", event, "timer",
				record, 0) == -1)
		tep_print_num_field(s, "0x%llx", event, "hrtimer",
				    record, 1);

	trace_seq_printf(s, " now=");

	tep_print_num_field(s, "%llu", event, "now", record, 1);

	tep_print_func_field(s, " function=%s", event, "function",
				record, 0);
	return 0;
}

static int timer_start_handler(struct trace_seq *s,
			       struct tep_record *record,
			       struct tep_event_format *event, void *context)
{
	trace_seq_printf(s, "hrtimer=");

	if (tep_print_num_field(s, "0x%llx", event, "timer",
				record, 0) == -1)
		tep_print_num_field(s, "0x%llx", event, "hrtimer",
				    record, 1);

	tep_print_func_field(s, " function=%s", event, "function",
			     record, 0);

	trace_seq_printf(s, " expires=");
	tep_print_num_field(s, "%llu", event, "expires", record, 1);

	trace_seq_printf(s, " softexpires=");
	tep_print_num_field(s, "%llu", event, "softexpires", record, 1);
	return 0;
}

int TEP_PLUGIN_LOADER(struct tep_handle *pevent)
{
	tep_register_event_handler(pevent, -1,
				   "timer", "hrtimer_expire_entry",
				   timer_expire_handler, NULL);

	tep_register_event_handler(pevent, -1, "timer", "hrtimer_start",
				   timer_start_handler, NULL);
	return 0;
}

void TEP_PLUGIN_UNLOADER(struct tep_handle *pevent)
{
	tep_unregister_event_handler(pevent, -1,
				     "timer", "hrtimer_expire_entry",
				     timer_expire_handler, NULL);

	tep_unregister_event_handler(pevent, -1, "timer", "hrtimer_start",
				     timer_start_handler, NULL);
}