LXR linux/tools/lib/traceevent/plugins/plugin

   1// SPDX-License-Identifier: LGPL-2.1
   2/*
   3 * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
   4 * Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
   5 */
   6#include <stdio.h>
   7#include <stdlib.h>
   8#include <string.h>
   9
  10#include "event-parse.h"
  11#include "trace-seq.h"
  12
  13static int timer_expire_handler(struct trace_seq *s,
  14                                struct tep_record *record,
  15                                struct tep_event *event, void *context)
  16{
  17        trace_seq_printf(s, "hrtimer=");
  18
  19        if (tep_print_num_field(s, "0x%llx", event, "timer",
  20                                record, 0) == -1)
  21                tep_print_num_field(s, "0x%llx", event, "hrtimer",
  22                                    record, 1);
  23
  24        trace_seq_printf(s, " now=");
  25
  26        tep_print_num_field(s, "%llu", event, "now", record, 1);
  27
  28        tep_print_func_field(s, " function=%s", event, "function",
  29                                record, 0);
  30        return 0;
  31}
  32
  33static int timer_start_handler(struct trace_seq *s,
  34                               struct tep_record *record,
  35                               struct tep_event *event, void *context)
  36{
  37        trace_seq_printf(s, "hrtimer=");
  38
  39        if (tep_print_num_field(s, "0x%llx", event, "timer",
  40                                record, 0) == -1)
  41                tep_print_num_field(s, "0x%llx", event, "hrtimer",
  42                                    record, 1);
  43
  44        tep_print_func_field(s, " function=%s", event, "function",
  45                             record, 0);
  46
  47        trace_seq_printf(s, " expires=");
  48        tep_print_num_field(s, "%llu", event, "expires", record, 1);
  49
  50        trace_seq_printf(s, " softexpires=");
  51        tep_print_num_field(s, "%llu", event, "softexpires", record, 1);
  52        return 0;
  53}
  54
  55int TEP_PLUGIN_LOADER(struct tep_handle *tep)
  56{
  57        tep_register_event_handler(tep, -1,
  58                                   "timer", "hrtimer_expire_entry",
  59                                   timer_expire_handler, NULL);
  60
  61        tep_register_event_handler(tep, -1, "timer", "hrtimer_start",
  62                                   timer_start_handler, NULL);
  63        return 0;
  64}
  65
  66void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
  67{
  68        tep_unregister_event_handler(tep, -1,
  69                                     "timer", "hrtimer_expire_entry",
  70                                     timer_expire_handler, NULL);
  71
  72        tep_unregister_event_handler(tep, -1, "timer", "hrtimer_start",
  73                                     timer_start_handler, NULL);
  74}
  75