tools/lib/traceevent/plugins/plugin_kmem.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 /*
   3  * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <[email protected]>
   4  */
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8
   9 #include "event-parse.h"
  10 #include "trace-seq.h"
  11
  12 static int call_site_handler(struct trace_seq *s, struct tep_record *record,
  13                              struct tep_event *event, void *context)
  14 {
  15         struct tep_format_field *field;
  16         unsigned long long val, addr;
  17         void *data = record->data;
  18         const char *func;
  19
  20         field = tep_find_field(event, "call_site");
  21         if (!field)
  22                 return 1;
  23
  24         if (tep_read_number_field(field, data, &val))
  25                 return 1;
  26
  27         func = tep_find_function(event->tep, val);
  28         if (!func)
  29                 return 1;
  30
  31         addr = tep_find_function_address(event->tep, val);
  32
  33         trace_seq_printf(s, "(%s+0x%x) ", func, (int)(val - addr));
  34         return 1;
  35 }
  36
  37 int TEP_PLUGIN_LOADER(struct tep_handle *tep)
  38 {
  39         tep_register_event_handler(tep, -1, "kmem", "kfree",
  40                                    call_site_handler, NULL);
  41
  42         tep_register_event_handler(tep, -1, "kmem", "kmalloc",
  43                                    call_site_handler, NULL);
  44
  45         tep_register_event_handler(tep, -1, "kmem", "kmalloc_node",
  46                                    call_site_handler, NULL);
  47
  48         tep_register_event_handler(tep, -1, "kmem", "kmem_cache_alloc",
  49                                    call_site_handler, NULL);
  50
  51         tep_register_event_handler(tep, -1, "kmem",
  52                                    "kmem_cache_alloc_node",
  53                                    call_site_handler, NULL);
  54
  55         tep_register_event_handler(tep, -1, "kmem", "kmem_cache_free",
  56                                    call_site_handler, NULL);
  57         return 0;
  58 }
  59
  60 void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
  61 {
  62         tep_unregister_event_handler(tep, -1, "kmem", "kfree",
  63                                      call_site_handler, NULL);
  64
  65         tep_unregister_event_handler(tep, -1, "kmem", "kmalloc",
  66                                      call_site_handler, NULL);
  67
  68         tep_unregister_event_handler(tep, -1, "kmem", "kmalloc_node",
  69                                      call_site_handler, NULL);
  70
  71         tep_unregister_event_handler(tep, -1, "kmem", "kmem_cache_alloc",
  72                                      call_site_handler, NULL);
  73
  74         tep_unregister_event_handler(tep, -1, "kmem",
  75                                      "kmem_cache_alloc_node",
  76                                      call_site_handler, NULL);
  77
  78         tep_unregister_event_handler(tep, -1, "kmem", "kmem_cache_free",
  79                                      call_site_handler, NULL);
  80 }