1 /*
2 * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
3 *
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation;
8 * version 2.1 of the License (not later!)
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not, see <http://www.gnu.org/licenses>
17 *
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 */
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23
24 #include "event-parse.h"
25
call_site_handler(struct trace_seq * s,struct pevent_record * record,struct event_format * event,void * context)26 static int call_site_handler(struct trace_seq *s, struct pevent_record *record,
27 struct event_format *event, void *context)
28 {
29 struct format_field *field;
30 unsigned long long val, addr;
31 void *data = record->data;
32 const char *func;
33
34 field = pevent_find_field(event, "call_site");
35 if (!field)
36 return 1;
37
38 if (pevent_read_number_field(field, data, &val))
39 return 1;
40
41 func = pevent_find_function(event->pevent, val);
42 if (!func)
43 return 1;
44
45 addr = pevent_find_function_address(event->pevent, val);
46
47 trace_seq_printf(s, "(%s+0x%x) ", func, (int)(val - addr));
48 return 1;
49 }
50
PEVENT_PLUGIN_LOADER(struct pevent * pevent)51 int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
52 {
53 pevent_register_event_handler(pevent, -1, "kmem", "kfree",
54 call_site_handler, NULL);
55
56 pevent_register_event_handler(pevent, -1, "kmem", "kmalloc",
57 call_site_handler, NULL);
58
59 pevent_register_event_handler(pevent, -1, "kmem", "kmalloc_node",
60 call_site_handler, NULL);
61
62 pevent_register_event_handler(pevent, -1, "kmem", "kmem_cache_alloc",
63 call_site_handler, NULL);
64
65 pevent_register_event_handler(pevent, -1, "kmem",
66 "kmem_cache_alloc_node",
67 call_site_handler, NULL);
68
69 pevent_register_event_handler(pevent, -1, "kmem", "kmem_cache_free",
70 call_site_handler, NULL);
71 return 0;
72 }
73
PEVENT_PLUGIN_UNLOADER(struct pevent * pevent)74 void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
75 {
76 pevent_unregister_event_handler(pevent, -1, "kmem", "kfree",
77 call_site_handler, NULL);
78
79 pevent_unregister_event_handler(pevent, -1, "kmem", "kmalloc",
80 call_site_handler, NULL);
81
82 pevent_unregister_event_handler(pevent, -1, "kmem", "kmalloc_node",
83 call_site_handler, NULL);
84
85 pevent_unregister_event_handler(pevent, -1, "kmem", "kmem_cache_alloc",
86 call_site_handler, NULL);
87
88 pevent_unregister_event_handler(pevent, -1, "kmem",
89 "kmem_cache_alloc_node",
90 call_site_handler, NULL);
91
92 pevent_unregister_event_handler(pevent, -1, "kmem", "kmem_cache_free",
93 call_site_handler, NULL);
94 }
95