Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _LINUX_PROFILE_H
2#define _LINUX_PROFILE_H
3
4#include <linux/kernel.h>
5#include <linux/init.h>
6#include <linux/cpumask.h>
7#include <linux/cache.h>
8
9#include <asm/errno.h>
10
11#define CPU_PROFILING 1
12#define SCHED_PROFILING 2
13#define SLEEP_PROFILING 3
14#define KVM_PROFILING 4
15
16struct proc_dir_entry;
17struct pt_regs;
18struct notifier_block;
19
20#if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
21void create_prof_cpu_mask(struct proc_dir_entry *de);
22int create_proc_profile(void);
23#else
24static inline void create_prof_cpu_mask(struct proc_dir_entry *de)
25{
26}
27
28static inline int create_proc_profile(void)
29{
30 return 0;
31}
32#endif
33
34enum profile_type {
35 PROFILE_TASK_EXIT,
36 PROFILE_MUNMAP
37};
38
39#ifdef CONFIG_PROFILING
40
41extern int prof_on __read_mostly;
42
43/* init basic kernel profiler */
44int profile_init(void);
45int profile_setup(char *str);
46void profile_tick(int type);
47
48/*
49 * Add multiple profiler hits to a given address:
50 */
51void profile_hits(int type, void *ip, unsigned int nr_hits);
52
53/*
54 * Single profiler hit:
55 */
56static inline void profile_hit(int type, void *ip)
57{
58 /*
59 * Speedup for the common (no profiling enabled) case:
60 */
61 if (unlikely(prof_on == type))
62 profile_hits(type, ip, 1);
63}
64
65struct task_struct;
66struct mm_struct;
67
68/* task is in do_exit() */
69void profile_task_exit(struct task_struct * task);
70
71/* task is dead, free task struct ? Returns 1 if
72 * the task was taken, 0 if the task should be freed.
73 */
74int profile_handoff_task(struct task_struct * task);
75
76/* sys_munmap */
77void profile_munmap(unsigned long addr);
78
79int task_handoff_register(struct notifier_block * n);
80int task_handoff_unregister(struct notifier_block * n);
81
82int profile_event_register(enum profile_type, struct notifier_block * n);
83int profile_event_unregister(enum profile_type, struct notifier_block * n);
84
85int register_timer_hook(int (*hook)(struct pt_regs *));
86void unregister_timer_hook(int (*hook)(struct pt_regs *));
87
88struct pt_regs;
89
90#else
91
92#define prof_on 0
93
94static inline int profile_init(void)
95{
96 return 0;
97}
98
99static inline void profile_tick(int type)
100{
101 return;
102}
103
104static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
105{
106 return;
107}
108
109static inline void profile_hit(int type, void *ip)
110{
111 return;
112}
113
114static inline int task_handoff_register(struct notifier_block * n)
115{
116 return -ENOSYS;
117}
118
119static inline int task_handoff_unregister(struct notifier_block * n)
120{
121 return -ENOSYS;
122}
123
124static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
125{
126 return -ENOSYS;
127}
128
129static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
130{
131 return -ENOSYS;
132}
133
134#define profile_task_exit(a) do { } while (0)
135#define profile_handoff_task(a) (0)
136#define profile_munmap(a) do { } while (0)
137
138static inline int register_timer_hook(int (*hook)(struct pt_regs *))
139{
140 return -ENOSYS;
141}
142
143static inline void unregister_timer_hook(int (*hook)(struct pt_regs *))
144{
145 return;
146}
147
148#endif /* CONFIG_PROFILING */
149
150#endif /* _LINUX_PROFILE_H */