Linux Kernel  3.7.1
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profile.h
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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 
16 struct proc_dir_entry;
17 struct pt_regs;
18 struct notifier_block;
19 
20 #if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
21 void create_prof_cpu_mask(struct proc_dir_entry *de);
22 int create_proc_profile(void);
23 #else
24 static inline void create_prof_cpu_mask(struct proc_dir_entry *de)
25 {
26 }
27 
28 static inline int create_proc_profile(void)
29 {
30  return 0;
31 }
32 #endif
33 
37 };
38 
39 #ifdef CONFIG_PROFILING
40 
41 extern int prof_on __read_mostly;
42 
43 /* init basic kernel profiler */
44 int profile_init(void);
45 int profile_setup(char *str);
46 void profile_tick(int type);
47 
48 /*
49  * Add multiple profiler hits to a given address:
50  */
51 void profile_hits(int type, void *ip, unsigned int nr_hits);
52 
53 /*
54  * Single profiler hit:
55  */
56 static 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 
65 struct task_struct;
66 struct mm_struct;
67 
68 /* task is in do_exit() */
69 void 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  */
75 
76 /* sys_munmap */
77 void profile_munmap(unsigned long addr);
78 
81 
84 
85 int register_timer_hook(int (*hook)(struct pt_regs *));
86 void unregister_timer_hook(int (*hook)(struct pt_regs *));
87 
88 struct pt_regs;
89 
90 #else
91 
92 #define prof_on 0
93 
94 static inline int profile_init(void)
95 {
96  return 0;
97 }
98 
99 static inline void profile_tick(int type)
100 {
101  return;
102 }
103 
104 static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
105 {
106  return;
107 }
108 
109 static inline void profile_hit(int type, void *ip)
110 {
111  return;
112 }
113 
114 static inline int task_handoff_register(struct notifier_block * n)
115 {
116  return -ENOSYS;
117 }
118 
119 static inline int task_handoff_unregister(struct notifier_block * n)
120 {
121  return -ENOSYS;
122 }
123 
124 static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
125 {
126  return -ENOSYS;
127 }
128 
129 static 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 
138 static inline int register_timer_hook(int (*hook)(struct pt_regs *))
139 {
140  return -ENOSYS;
141 }
142 
143 static 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 */