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