3b571f1b99e3f2ef8a9ebcaa8a0a6c056fdd2f3e
[ust.git] / libust / tracercore.c
1 /*
2 * LTT core in-kernel infrastructure.
3 *
4 * Copyright 2006 - Mathieu Desnoyers mathieu.desnoyers@polymtl.ca
5 *
6 * Distributed under the GPL license
7 */
8
9 //ust// #include <linux/ltt-core.h>
10 //ust// #include <linux/percpu.h>
11 //ust// #include <linux/module.h>
12 //ust// #include <linux/debugfs.h>
13 #include "kernelcompat.h"
14 #include "tracercore.h"
15
16 /* Traces structures */
17 struct ltt_traces ltt_traces = {
18 .setup_head = LIST_HEAD_INIT(ltt_traces.setup_head),
19 .head = LIST_HEAD_INIT(ltt_traces.head),
20 };
21 //ust// EXPORT_SYMBOL(ltt_traces);
22
23 /* Traces list writer locking */
24 static DEFINE_MUTEX(ltt_traces_mutex);
25
26 /* dentry of ltt's root dir */
27 //ust// static struct dentry *ltt_root_dentry;
28 //ust// struct dentry *get_ltt_root(void)
29 //ust// {
30 //ust// if (!ltt_root_dentry) {
31 //ust// ltt_root_dentry = debugfs_create_dir(LTT_ROOT, NULL);
32 //ust// if (!ltt_root_dentry)
33 //ust// printk(KERN_ERR "LTT : create ltt root dir failed\n");
34 //ust// }
35 //ust// return ltt_root_dentry;
36 //ust// }
37 //ust// EXPORT_SYMBOL_GPL(get_ltt_root);
38
39 void ltt_lock_traces(void)
40 {
41 mutex_lock(&ltt_traces_mutex);
42 }
43 //ust// EXPORT_SYMBOL_GPL(ltt_lock_traces);
44
45 void ltt_unlock_traces(void)
46 {
47 mutex_unlock(&ltt_traces_mutex);
48 }
49 //ust// EXPORT_SYMBOL_GPL(ltt_unlock_traces);
50
51 //ust// DEFINE_PER_CPU(unsigned int, ltt_nesting);
52 //ust// EXPORT_PER_CPU_SYMBOL(ltt_nesting);
53 unsigned int ltt_nesting;
54
55 int ltt_run_filter_default(void *trace, uint16_t eID)
56 {
57 return 1;
58 }
59
60 /* This function pointer is protected by a trace activation check */
61 ltt_run_filter_functor ltt_run_filter = ltt_run_filter_default;
62 //ust// EXPORT_SYMBOL_GPL(ltt_run_filter);
63
64 void ltt_filter_register(ltt_run_filter_functor func)
65 {
66 ltt_run_filter = func;
67 }
68 //ust// EXPORT_SYMBOL_GPL(ltt_filter_register);
69
70 void ltt_filter_unregister(void)
71 {
72 ltt_run_filter = ltt_run_filter_default;
73 }
74 //ust// EXPORT_SYMBOL_GPL(ltt_filter_unregister);
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