Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 1 | #ifndef _LINUX_FTRACE_EVENT_H |
| 2 | #define _LINUX_FTRACE_EVENT_H |
| 3 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 4 | #include <linux/ring_buffer.h> |
Steven Rostedt | 16bb8eb | 2009-09-12 19:04:54 -0400 | [diff] [blame] | 5 | #include <linux/trace_seq.h> |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 6 | #include <linux/percpu.h> |
Frederic Weisbecker | 20ab4425 | 2009-09-18 06:10:28 +0200 | [diff] [blame] | 7 | #include <linux/hardirq.h> |
Xiao Guangrong | 430ad5a | 2010-01-28 09:32:29 +0800 | [diff] [blame] | 8 | #include <linux/perf_event.h> |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 9 | |
| 10 | struct trace_array; |
| 11 | struct tracer; |
Steven Rostedt | 6d72373 | 2009-04-10 14:53:50 -0400 | [diff] [blame] | 12 | struct dentry; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 13 | |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 14 | DECLARE_PER_CPU(struct trace_seq, ftrace_event_seq); |
| 15 | |
| 16 | struct trace_print_flags { |
| 17 | unsigned long mask; |
| 18 | const char *name; |
| 19 | }; |
| 20 | |
| 21 | const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim, |
| 22 | unsigned long flags, |
| 23 | const struct trace_print_flags *flag_array); |
| 24 | |
Steven Rostedt | 0f4fc29 | 2009-05-20 19:21:47 -0400 | [diff] [blame] | 25 | const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
| 26 | const struct trace_print_flags *symbol_array); |
| 27 | |
Kei Tokunaga | 5a2e399 | 2010-04-01 20:40:58 +0900 | [diff] [blame] | 28 | const char *ftrace_print_hex_seq(struct trace_seq *p, |
| 29 | const unsigned char *buf, int len); |
| 30 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 31 | /* |
| 32 | * The trace entry - the most basic unit of tracing. This is what |
| 33 | * is printed in the end as a single line in the trace output, such as: |
| 34 | * |
| 35 | * bash-15816 [01] 235.197585: idle_cpu <- irq_enter |
| 36 | */ |
| 37 | struct trace_entry { |
Steven Rostedt | 89ec0de | 2009-03-26 11:03:29 -0400 | [diff] [blame] | 38 | unsigned short type; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 39 | unsigned char flags; |
| 40 | unsigned char preempt_count; |
| 41 | int pid; |
Steven Rostedt | 637e7e8 | 2009-09-11 13:55:35 -0400 | [diff] [blame] | 42 | int lock_depth; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 43 | }; |
| 44 | |
Steven Rostedt | 89ec0de | 2009-03-26 11:03:29 -0400 | [diff] [blame] | 45 | #define FTRACE_MAX_EVENT \ |
| 46 | ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1) |
| 47 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 48 | /* |
| 49 | * Trace iterator - used by printout routines who present trace |
| 50 | * results to users and which routines might sleep, etc: |
| 51 | */ |
| 52 | struct trace_iterator { |
| 53 | struct trace_array *tr; |
| 54 | struct tracer *trace; |
| 55 | void *private; |
| 56 | int cpu_file; |
| 57 | struct mutex mutex; |
| 58 | struct ring_buffer_iter *buffer_iter[NR_CPUS]; |
Steven Rostedt | 112f38a7 | 2009-06-01 15:16:05 -0400 | [diff] [blame] | 59 | unsigned long iter_flags; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 60 | |
| 61 | /* The below is zeroed out in pipe_read */ |
| 62 | struct trace_seq seq; |
| 63 | struct trace_entry *ent; |
Steven Rostedt | bc21b47 | 2010-03-31 19:49:26 -0400 | [diff] [blame] | 64 | unsigned long lost_events; |
Steven Rostedt | a63ce5b | 2009-12-07 09:11:39 -0500 | [diff] [blame] | 65 | int leftover; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 66 | int cpu; |
| 67 | u64 ts; |
| 68 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 69 | loff_t pos; |
| 70 | long idx; |
| 71 | |
| 72 | cpumask_var_t started; |
| 73 | }; |
| 74 | |
| 75 | |
| 76 | typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, |
| 77 | int flags); |
| 78 | struct trace_event { |
| 79 | struct hlist_node node; |
Steven Rostedt | 060fa5c8 | 2009-04-24 12:20:52 -0400 | [diff] [blame] | 80 | struct list_head list; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 81 | int type; |
| 82 | trace_print_func trace; |
| 83 | trace_print_func raw; |
| 84 | trace_print_func hex; |
| 85 | trace_print_func binary; |
| 86 | }; |
| 87 | |
| 88 | extern int register_ftrace_event(struct trace_event *event); |
| 89 | extern int unregister_ftrace_event(struct trace_event *event); |
| 90 | |
| 91 | /* Return values for print_line callback */ |
| 92 | enum print_line_t { |
| 93 | TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ |
| 94 | TRACE_TYPE_HANDLED = 1, |
| 95 | TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ |
| 96 | TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ |
| 97 | }; |
| 98 | |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 99 | void tracing_generic_entry_update(struct trace_entry *entry, |
| 100 | unsigned long flags, |
| 101 | int pc); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 102 | struct ring_buffer_event * |
Steven Rostedt | e77405a | 2009-09-02 14:17:06 -0400 | [diff] [blame] | 103 | trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer, |
| 104 | int type, unsigned long len, |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 105 | unsigned long flags, int pc); |
Steven Rostedt | e77405a | 2009-09-02 14:17:06 -0400 | [diff] [blame] | 106 | void trace_current_buffer_unlock_commit(struct ring_buffer *buffer, |
| 107 | struct ring_buffer_event *event, |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 108 | unsigned long flags, int pc); |
Steven Rostedt | e77405a | 2009-09-02 14:17:06 -0400 | [diff] [blame] | 109 | void trace_nowake_buffer_unlock_commit(struct ring_buffer *buffer, |
| 110 | struct ring_buffer_event *event, |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 111 | unsigned long flags, int pc); |
Steven Rostedt | e77405a | 2009-09-02 14:17:06 -0400 | [diff] [blame] | 112 | void trace_current_buffer_discard_commit(struct ring_buffer *buffer, |
| 113 | struct ring_buffer_event *event); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 114 | |
| 115 | void tracing_record_cmdline(struct task_struct *tsk); |
| 116 | |
Li Zefan | 1f9963c | 2009-07-20 10:20:53 +0800 | [diff] [blame] | 117 | struct event_filter; |
| 118 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 119 | struct ftrace_event_call { |
Steven Rostedt | a59fd60 | 2009-04-10 13:52:20 -0400 | [diff] [blame] | 120 | struct list_head list; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 121 | char *name; |
| 122 | char *system; |
| 123 | struct dentry *dir; |
Steven Rostedt | 6d72373 | 2009-04-10 14:53:50 -0400 | [diff] [blame] | 124 | struct trace_event *event; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 125 | int enabled; |
Masami Hiramatsu | bd1a5c8 | 2009-08-13 16:34:53 -0400 | [diff] [blame] | 126 | int (*regfunc)(struct ftrace_event_call *); |
| 127 | void (*unregfunc)(struct ftrace_event_call *); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 128 | int id; |
Lai Jiangshan | 509e760 | 2009-12-15 15:39:42 +0800 | [diff] [blame] | 129 | const char *print_fmt; |
Masami Hiramatsu | bd1a5c8 | 2009-08-13 16:34:53 -0400 | [diff] [blame] | 130 | int (*raw_init)(struct ftrace_event_call *); |
Li Zefan | 14be96c | 2009-08-19 15:53:52 +0800 | [diff] [blame] | 131 | int (*define_fields)(struct ftrace_event_call *); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 132 | struct list_head fields; |
Tom Zanussi | 30e673b | 2009-04-28 03:04:47 -0500 | [diff] [blame] | 133 | int filter_active; |
Li Zefan | 1f9963c | 2009-07-20 10:20:53 +0800 | [diff] [blame] | 134 | struct event_filter *filter; |
Steven Rostedt | 6d72373 | 2009-04-10 14:53:50 -0400 | [diff] [blame] | 135 | void *mod; |
Jason Baron | 69fd4f0 | 2009-08-10 16:52:44 -0400 | [diff] [blame] | 136 | void *data; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 137 | |
Frederic Weisbecker | 97d5a22 | 2010-03-05 05:35:37 +0100 | [diff] [blame] | 138 | int perf_refcount; |
| 139 | int (*perf_event_enable)(struct ftrace_event_call *); |
| 140 | void (*perf_event_disable)(struct ftrace_event_call *); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 141 | }; |
| 142 | |
Frederic Weisbecker | 97d5a22 | 2010-03-05 05:35:37 +0100 | [diff] [blame] | 143 | #define PERF_MAX_TRACE_SIZE 2048 |
Frederic Weisbecker | 20ab4425 | 2009-09-18 06:10:28 +0200 | [diff] [blame] | 144 | |
Tom Zanussi | 8b37256 | 2009-04-28 03:04:59 -0500 | [diff] [blame] | 145 | #define MAX_FILTER_PRED 32 |
Steven Rostedt | 16bb8eb | 2009-09-12 19:04:54 -0400 | [diff] [blame] | 146 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 147 | |
Li Zefan | 2df75e4 | 2009-05-06 10:33:04 +0800 | [diff] [blame] | 148 | extern void destroy_preds(struct ftrace_event_call *call); |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 149 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
Steven Rostedt | e77405a | 2009-09-02 14:17:06 -0400 | [diff] [blame] | 150 | extern int filter_current_check_discard(struct ring_buffer *buffer, |
| 151 | struct ftrace_event_call *call, |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 152 | void *rec, |
| 153 | struct ring_buffer_event *event); |
| 154 | |
Li Zefan | 43b51ea | 2009-08-07 10:33:22 +0800 | [diff] [blame] | 155 | enum { |
| 156 | FILTER_OTHER = 0, |
| 157 | FILTER_STATIC_STRING, |
| 158 | FILTER_DYN_STRING, |
Li Zefan | 87a342f | 2009-08-07 10:33:43 +0800 | [diff] [blame] | 159 | FILTER_PTR_STRING, |
Li Zefan | 43b51ea | 2009-08-07 10:33:22 +0800 | [diff] [blame] | 160 | }; |
| 161 | |
Li Zefan | 87d9b4e | 2009-12-08 11:14:20 +0800 | [diff] [blame] | 162 | extern int trace_event_raw_init(struct ftrace_event_call *call); |
Frederic Weisbecker | aeaeae1 | 2009-08-27 05:09:51 +0200 | [diff] [blame] | 163 | extern int trace_define_field(struct ftrace_event_call *call, const char *type, |
| 164 | const char *name, int offset, int size, |
| 165 | int is_signed, int filter_type); |
Masami Hiramatsu | bd1a5c8 | 2009-08-13 16:34:53 -0400 | [diff] [blame] | 166 | extern int trace_add_event_call(struct ftrace_event_call *call); |
| 167 | extern void trace_remove_event_call(struct ftrace_event_call *call); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 168 | |
Tom Zanussi | a118e4d | 2009-04-28 03:04:53 -0500 | [diff] [blame] | 169 | #define is_signed_type(type) (((type)(-1)) < 0) |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 170 | |
Steven Rostedt | 4671c79 | 2009-05-08 16:27:41 -0400 | [diff] [blame] | 171 | int trace_set_clr_event(const char *system, const char *event, int set); |
| 172 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 173 | /* |
| 174 | * The double __builtin_constant_p is because gcc will give us an error |
| 175 | * if we try to allocate the static variable to fmt if it is not a |
| 176 | * constant. Even with the outer if statement optimizing out. |
| 177 | */ |
| 178 | #define event_trace_printk(ip, fmt, args...) \ |
| 179 | do { \ |
| 180 | __trace_printk_check_format(fmt, ##args); \ |
| 181 | tracing_record_cmdline(current); \ |
| 182 | if (__builtin_constant_p(fmt)) { \ |
| 183 | static const char *trace_printk_fmt \ |
| 184 | __attribute__((section("__trace_printk_fmt"))) = \ |
| 185 | __builtin_constant_p(fmt) ? fmt : NULL; \ |
| 186 | \ |
| 187 | __trace_bprintk(ip, trace_printk_fmt, ##args); \ |
| 188 | } else \ |
| 189 | __trace_printk(ip, fmt, ##args); \ |
| 190 | } while (0) |
| 191 | |
Li Zefan | 07b139c | 2009-12-21 14:27:35 +0800 | [diff] [blame] | 192 | #ifdef CONFIG_PERF_EVENTS |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 193 | struct perf_event; |
Frederic Weisbecker | c530665 | 2010-03-03 07:16:16 +0100 | [diff] [blame] | 194 | |
| 195 | DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); |
| 196 | |
Frederic Weisbecker | 97d5a22 | 2010-03-05 05:35:37 +0100 | [diff] [blame] | 197 | extern int perf_trace_enable(int event_id); |
| 198 | extern void perf_trace_disable(int event_id); |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 199 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, |
| 200 | char *filter_str); |
| 201 | extern void ftrace_profile_free_filter(struct perf_event *event); |
Xiao Guangrong | 430ad5a | 2010-01-28 09:32:29 +0800 | [diff] [blame] | 202 | extern void * |
Frederic Weisbecker | 97d5a22 | 2010-03-05 05:35:37 +0100 | [diff] [blame] | 203 | perf_trace_buf_prepare(int size, unsigned short type, int *rctxp, |
Xiao Guangrong | 430ad5a | 2010-01-28 09:32:29 +0800 | [diff] [blame] | 204 | unsigned long *irq_flags); |
| 205 | |
| 206 | static inline void |
Frederic Weisbecker | 97d5a22 | 2010-03-05 05:35:37 +0100 | [diff] [blame] | 207 | perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr, |
Frederic Weisbecker | c530665 | 2010-03-03 07:16:16 +0100 | [diff] [blame] | 208 | u64 count, unsigned long irq_flags, struct pt_regs *regs) |
Xiao Guangrong | 430ad5a | 2010-01-28 09:32:29 +0800 | [diff] [blame] | 209 | { |
| 210 | struct trace_entry *entry = raw_data; |
| 211 | |
Frederic Weisbecker | c530665 | 2010-03-03 07:16:16 +0100 | [diff] [blame] | 212 | perf_tp_event(entry->type, addr, count, raw_data, size, regs); |
Xiao Guangrong | 430ad5a | 2010-01-28 09:32:29 +0800 | [diff] [blame] | 213 | perf_swevent_put_recursion_context(rctx); |
| 214 | local_irq_restore(irq_flags); |
| 215 | } |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 216 | #endif |
| 217 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 218 | #endif /* _LINUX_FTRACE_EVENT_H */ |