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 34 enum profile_type { 35 PROFILE_TASK_EXIT, 36 PROFILE_MUNMAP 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 */ 74 int profile_handoff_task(struct task_struct * task); 75 76 /* sys_munmap */ 77 void profile_munmap(unsigned long addr); 78 79 int task_handoff_register(struct notifier_block * n); 80 int task_handoff_unregister(struct notifier_block * n); 81 82 int profile_event_register(enum profile_type, struct notifier_block * n); 83 int profile_event_unregister(enum profile_type, struct notifier_block * n); 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 */ 151