traceevent/plugins/plugin_hrtimer.c

0001 // SPDX-License-Identifier: LGPL-2.1
0002 /*
0003  * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
0004  * Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
0005  */
0006 #include <stdio.h>
0007 #include <stdlib.h>
0008 #include <string.h>
0009
0010 #include "event-parse.h"
0011 #include "trace-seq.h"
0012
0013 static int timer_expire_handler(struct trace_seq *s,
0014                 struct tep_record *record,
0015                 struct tep_event *event, void *context)
0016 {
0017     trace_seq_printf(s, "hrtimer=");
0018
0019     if (tep_print_num_field(s, "0x%llx", event, "timer",
0020                 record, 0) == -1)
0021         tep_print_num_field(s, "0x%llx", event, "hrtimer",
0022                     record, 1);
0023
0024     trace_seq_printf(s, " now=");
0025
0026     tep_print_num_field(s, "%llu", event, "now", record, 1);
0027
0028     tep_print_func_field(s, " function=%s", event, "function",
0029                 record, 0);
0030     return 0;
0031 }
0032
0033 static int timer_start_handler(struct trace_seq *s,
0034                    struct tep_record *record,
0035                    struct tep_event *event, void *context)
0036 {
0037     trace_seq_printf(s, "hrtimer=");
0038
0039     if (tep_print_num_field(s, "0x%llx", event, "timer",
0040                 record, 0) == -1)
0041         tep_print_num_field(s, "0x%llx", event, "hrtimer",
0042                     record, 1);
0043
0044     tep_print_func_field(s, " function=%s", event, "function",
0045                  record, 0);
0046
0047     trace_seq_printf(s, " expires=");
0048     tep_print_num_field(s, "%llu", event, "expires", record, 1);
0049
0050     trace_seq_printf(s, " softexpires=");
0051     tep_print_num_field(s, "%llu", event, "softexpires", record, 1);
0052     return 0;
0053 }
0054
0055 int TEP_PLUGIN_LOADER(struct tep_handle *tep)
0056 {
0057     tep_register_event_handler(tep, -1,
0058                    "timer", "hrtimer_expire_entry",
0059                    timer_expire_handler, NULL);
0060
0061     tep_register_event_handler(tep, -1, "timer", "hrtimer_start",
0062                    timer_start_handler, NULL);
0063     return 0;
0064 }
0065
0066 void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
0067 {
0068     tep_unregister_event_handler(tep, -1,
0069                      "timer", "hrtimer_expire_entry",
0070                      timer_expire_handler, NULL);
0071
0072     tep_unregister_event_handler(tep, -1, "timer", "hrtimer_start",
0073                      timer_start_handler, NULL);
0074 }