plugins/plugin_hrtimer.c

// SPDX-License-Identifier: LGPL-2.1
/*
 * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
 * Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "event-parse.h"

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

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

	trace_seq_printf(s, " now=");

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

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

	return 0;
}

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

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

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

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

	trace_seq_printf(s, " softexpires=");
	pevent_print_num_field(s, "%llu", event, "softexpires", record, 1);

	return 0;
}

int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
{
	pevent_register_event_handler(pevent, -1, "timer", "hrtimer_expire_entry",
				      timer_expire_handler, NULL);

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

	return 0;
}

void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
{
	pevent_unregister_event_handler(pevent, -1,
					"timer", "hrtimer_expire_entry",
					timer_expire_handler, NULL);

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