tools/lib/traceevent/plugin_hrtimer.c

   1 /*
   2  * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
   3  * Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
   4  *
   5  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation;
   9  * version 2.1 of the License (not later!)
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this program; if not,  see <http://www.gnu.org/licenses>
  18  *
  19  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  20  */
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "event-parse.h"
  26
  27 static int timer_expire_handler(struct trace_seq *s,
  28                                 struct pevent_record *record,
  29                                 struct event_format *event, void *context)
  30 {
  31         trace_seq_printf(s, "hrtimer=");
  32
  33         if (pevent_print_num_field(s, "0x%llx", event, "timer",
  34                                    record, 0) == -1)
  35                 pevent_print_num_field(s, "0x%llx", event, "hrtimer",
  36                                        record, 1);
  37
  38         trace_seq_printf(s, " now=");
  39
  40         pevent_print_num_field(s, "%llu", event, "now", record, 1);
  41
  42         pevent_print_func_field(s, " function=%s", event, "function",
  43                                 record, 0);
  44         return 0;
  45 }
  46
  47 static int timer_start_handler(struct trace_seq *s,
  48                                struct pevent_record *record,
  49                                struct event_format *event, void *context)
  50 {
  51         trace_seq_printf(s, "hrtimer=");
  52
  53         if (pevent_print_num_field(s, "0x%llx", event, "timer",
  54                                    record, 0) == -1)
  55                 pevent_print_num_field(s, "0x%llx", event, "hrtimer",
  56                                        record, 1);
  57
  58         pevent_print_func_field(s, " function=%s", event, "function",
  59                                 record, 0);
  60
  61         trace_seq_printf(s, " expires=");
  62         pevent_print_num_field(s, "%llu", event, "expires", record, 1);
  63
  64         trace_seq_printf(s, " softexpires=");
  65         pevent_print_num_field(s, "%llu", event, "softexpires", record, 1);
  66         return 0;
  67 }
  68
  69 int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
  70 {
  71         pevent_register_event_handler(pevent, -1,
  72                                       "timer", "hrtimer_expire_entry",
  73                                       timer_expire_handler, NULL);
  74
  75         pevent_register_event_handler(pevent, -1, "timer", "hrtimer_start",
  76                                       timer_start_handler, NULL);
  77         return 0;
  78 }
  79
  80 void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
  81 {
  82         pevent_unregister_event_handler(pevent, -1,
  83                                         "timer", "hrtimer_expire_entry",
  84                                         timer_expire_handler, NULL);
  85
  86         pevent_unregister_event_handler(pevent, -1, "timer", "hrtimer_start",
  87                                         timer_start_handler, NULL);
  88 }