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(void); 22 int create_proc_profile(void); 23 #else 24 static inline void create_prof_cpu_mask(void) 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 int setup_profiling_timer(unsigned int multiplier); 48 49 /* 50 * Add multiple profiler hits to a given address: 51 */ 52 void profile_hits(int type, void *ip, unsigned int nr_hits); 53 54 /* 55 * Single profiler hit: 56 */ 57 static inline void profile_hit(int type, void *ip) 58 { 59 /* 60 * Speedup for the common (no profiling enabled) case: 61 */ 62 if (unlikely(prof_on == type)) 63 profile_hits(type, ip, 1); 64 } 65 66 struct task_struct; 67 struct mm_struct; 68 69 /* task is in do_exit() */ 70 void profile_task_exit(struct task_struct * task); 71 72 /* task is dead, free task struct ? Returns 1 if 73 * the task was taken, 0 if the task should be freed. 74 */ 75 int profile_handoff_task(struct task_struct * task); 76 77 /* sys_munmap */ 78 void profile_munmap(unsigned long addr); 79 80 int task_handoff_register(struct notifier_block * n); 81 int task_handoff_unregister(struct notifier_block * n); 82 83 int profile_event_register(enum profile_type, struct notifier_block * n); 84 int profile_event_unregister(enum profile_type, struct notifier_block * n); 85 86 struct pt_regs; 87 88 #else 89 90 #define prof_on 0 91 92 static inline int profile_init(void) 93 { 94 return 0; 95 } 96 97 static inline void profile_tick(int type) 98 { 99 return; 100 } 101 102 static inline void profile_hits(int type, void *ip, unsigned int nr_hits) 103 { 104 return; 105 } 106 107 static inline void profile_hit(int type, void *ip) 108 { 109 return; 110 } 111 112 static inline int task_handoff_register(struct notifier_block * n) 113 { 114 return -ENOSYS; 115 } 116 117 static inline int task_handoff_unregister(struct notifier_block * n) 118 { 119 return -ENOSYS; 120 } 121 122 static inline int profile_event_register(enum profile_type t, struct notifier_block * n) 123 { 124 return -ENOSYS; 125 } 126 127 static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n) 128 { 129 return -ENOSYS; 130 } 131 132 #define profile_task_exit(a) do { } while (0) 133 #define profile_handoff_task(a) (0) 134 #define profile_munmap(a) do { } while (0) 135 136 #endif /* CONFIG_PROFILING */ 137 138 #endif /* _LINUX_PROFILE_H */ 139