include/linux/profile.h

   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 <asm/errno.h>
  10
  11 #define CPU_PROFILING   1
  12 #define SCHED_PROFILING 2
  13
  14 struct proc_dir_entry;
  15 struct pt_regs;
  16 struct notifier_block;
  17
  18 /* init basic kernel profiler */
  19 void __init profile_init(void);
  20 void profile_tick(int);
  21 void profile_hit(int, void *);
  22 #ifdef CONFIG_PROC_FS
  23 void create_prof_cpu_mask(struct proc_dir_entry *);
  24 #else
  25 #define create_prof_cpu_mask(x)                 do { (void)(x); } while (0)
  26 #endif
  27
  28 enum profile_type {
  29         PROFILE_TASK_EXIT,
  30         PROFILE_MUNMAP
  31 };
  32
  33 #ifdef CONFIG_PROFILING
  34
  35 struct task_struct;
  36 struct mm_struct;
  37
  38 /* task is in do_exit() */
  39 void profile_task_exit(struct task_struct * task);
  40
  41 /* task is dead, free task struct ? Returns 1 if
  42  * the task was taken, 0 if the task should be freed.
  43  */
  44 int profile_handoff_task(struct task_struct * task);
  45
  46 /* sys_munmap */
  47 void profile_munmap(unsigned long addr);
  48
  49 int task_handoff_register(struct notifier_block * n);
  50 int task_handoff_unregister(struct notifier_block * n);
  51
  52 int profile_event_register(enum profile_type, struct notifier_block * n);
  53 int profile_event_unregister(enum profile_type, struct notifier_block * n);
  54
  55 int register_timer_hook(int (*hook)(struct pt_regs *));
  56 void unregister_timer_hook(int (*hook)(struct pt_regs *));
  57
  58 /* Timer based profiling hook */
  59 extern int (*timer_hook)(struct pt_regs *);
  60
  61 struct pt_regs;
  62
  63 #else
  64
  65 static inline int task_handoff_register(struct notifier_block * n)
  66 {
  67         return -ENOSYS;
  68 }
  69
  70 static inline int task_handoff_unregister(struct notifier_block * n)
  71 {
  72         return -ENOSYS;
  73 }
  74
  75 static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
  76 {
  77         return -ENOSYS;
  78 }
  79
  80 static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
  81 {
  82         return -ENOSYS;
  83 }
  84
  85 #define profile_task_exit(a) do { } while (0)
  86 #define profile_handoff_task(a) (0)
  87 #define profile_munmap(a) do { } while (0)
  88
  89 static inline int register_timer_hook(int (*hook)(struct pt_regs *))
  90 {
  91         return -ENOSYS;
  92 }
  93
  94 static inline void unregister_timer_hook(int (*hook)(struct pt_regs *))
  95 {
  96         return;
  97 }
  98
  99 #endif /* CONFIG_PROFILING */
 100
 101 #endif /* __KERNEL__ */
 102
 103 #endif /* _LINUX_PROFILE_H */