include/linux/profile.h

   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 #else
  23 static inline void create_prof_cpu_mask(struct proc_dir_entry *de)
  24 {
  25 }
  26 #endif
  27
  28 enum profile_type {
  29         PROFILE_TASK_EXIT,
  30         PROFILE_MUNMAP
  31 };
  32
  33 #ifdef CONFIG_PROFILING
  34
  35 extern int prof_on __read_mostly;
  36
  37 /* init basic kernel profiler */
  38 void __init profile_init(void);
  39 void profile_tick(int type);
  40
  41 /*
  42  * Add multiple profiler hits to a given address:
  43  */
  44 void profile_hits(int type, void *ip, unsigned int nr_hits);
  45
  46 /*
  47  * Single profiler hit:
  48  */
  49 static inline void profile_hit(int type, void *ip)
  50 {
  51         /*
  52          * Speedup for the common (no profiling enabled) case:
  53          */
  54         if (unlikely(prof_on == type))
  55                 profile_hits(type, ip, 1);
  56 }
  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 #define prof_on 0
  86
  87 static inline void profile_init(void)
  88 {
  89         return;
  90 }
  91
  92 static inline void profile_tick(int type)
  93 {
  94         return;
  95 }
  96
  97 static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
  98 {
  99         return;
 100 }
 101
 102 static inline void profile_hit(int type, void *ip)
 103 {
 104         return;
 105 }
 106
 107 static inline int task_handoff_register(struct notifier_block * n)
 108 {
 109         return -ENOSYS;
 110 }
 111
 112 static inline int task_handoff_unregister(struct notifier_block * n)
 113 {
 114         return -ENOSYS;
 115 }
 116
 117 static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
 118 {
 119         return -ENOSYS;
 120 }
 121
 122 static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
 123 {
 124         return -ENOSYS;
 125 }
 126
 127 #define profile_task_exit(a) do { } while (0)
 128 #define profile_handoff_task(a) (0)
 129 #define profile_munmap(a) do { } while (0)
 130
 131 static inline int register_timer_hook(int (*hook)(struct pt_regs *))
 132 {
 133         return -ENOSYS;
 134 }
 135
 136 static inline void unregister_timer_hook(int (*hook)(struct pt_regs *))
 137 {
 138         return;
 139 }
 140
 141 #endif /* CONFIG_PROFILING */
 142
 143 #endif /* _LINUX_PROFILE_H */