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bc0c38d1 SR |
1 | #ifndef _LINUX_KERNEL_TRACE_H |
2 | #define _LINUX_KERNEL_TRACE_H | |
3 | ||
4 | #include <linux/fs.h> | |
60063497 | 5 | #include <linux/atomic.h> |
bc0c38d1 SR |
6 | #include <linux/sched.h> |
7 | #include <linux/clocksource.h> | |
3928a8a2 | 8 | #include <linux/ring_buffer.h> |
bd8ac686 | 9 | #include <linux/mmiotrace.h> |
4e5292ea | 10 | #include <linux/tracepoint.h> |
d13744cd | 11 | #include <linux/ftrace.h> |
24f1e32c | 12 | #include <linux/hw_breakpoint.h> |
9504504c | 13 | #include <linux/trace_seq.h> |
97f20251 | 14 | #include <linux/ftrace_event.h> |
9504504c | 15 | |
72829bc3 TG |
16 | enum trace_type { |
17 | __TRACE_FIRST_TYPE = 0, | |
18 | ||
19 | TRACE_FN, | |
20 | TRACE_CTX, | |
21 | TRACE_WAKE, | |
22 | TRACE_STACK, | |
dd0e545f | 23 | TRACE_PRINT, |
48ead020 | 24 | TRACE_BPRINT, |
bd8ac686 PP |
25 | TRACE_MMIO_RW, |
26 | TRACE_MMIO_MAP, | |
9f029e83 | 27 | TRACE_BRANCH, |
287b6e68 FW |
28 | TRACE_GRAPH_RET, |
29 | TRACE_GRAPH_ENT, | |
02b67518 | 30 | TRACE_USER_STACK, |
c71a8961 | 31 | TRACE_BLK, |
72829bc3 | 32 | |
f0868d1e | 33 | __TRACE_LAST_TYPE, |
72829bc3 TG |
34 | }; |
35 | ||
bc0c38d1 | 36 | |
0a1c49db SR |
37 | #undef __field |
38 | #define __field(type, item) type item; | |
86387f7e | 39 | |
d7315094 SR |
40 | #undef __field_struct |
41 | #define __field_struct(type, item) __field(type, item) | |
86387f7e | 42 | |
d7315094 SR |
43 | #undef __field_desc |
44 | #define __field_desc(type, container, item) | |
02b67518 | 45 | |
0a1c49db SR |
46 | #undef __array |
47 | #define __array(type, item, size) type item[size]; | |
1427cdf0 | 48 | |
d7315094 SR |
49 | #undef __array_desc |
50 | #define __array_desc(type, container, item, size) | |
777e208d | 51 | |
0a1c49db SR |
52 | #undef __dynamic_array |
53 | #define __dynamic_array(type, item) type item[]; | |
777e208d | 54 | |
0a1c49db SR |
55 | #undef F_STRUCT |
56 | #define F_STRUCT(args...) args | |
74239072 | 57 | |
0a1c49db | 58 | #undef FTRACE_ENTRY |
02aa3162 JO |
59 | #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ |
60 | struct struct_name { \ | |
61 | struct trace_entry ent; \ | |
62 | tstruct \ | |
0a1c49db | 63 | } |
777e208d | 64 | |
0a1c49db SR |
65 | #undef TP_ARGS |
66 | #define TP_ARGS(args...) args | |
52f232cb | 67 | |
0a1c49db | 68 | #undef FTRACE_ENTRY_DUP |
02aa3162 | 69 | #define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk, filter) |
1e9b51c2 | 70 | |
e59a0bff | 71 | #undef FTRACE_ENTRY_REG |
02aa3162 JO |
72 | #define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \ |
73 | filter, regfn) \ | |
74 | FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ | |
75 | filter) | |
e59a0bff | 76 | |
0a1c49db | 77 | #include "trace_entries.h" |
36994e58 | 78 | |
0a1c49db SR |
79 | /* |
80 | * syscalls are special, and need special handling, this is why | |
81 | * they are not included in trace_entries.h | |
82 | */ | |
bed1ffca FW |
83 | struct syscall_trace_enter { |
84 | struct trace_entry ent; | |
85 | int nr; | |
86 | unsigned long args[]; | |
87 | }; | |
88 | ||
89 | struct syscall_trace_exit { | |
90 | struct trace_entry ent; | |
91 | int nr; | |
99df5a6a | 92 | long ret; |
bed1ffca FW |
93 | }; |
94 | ||
93ccae7a | 95 | struct kprobe_trace_entry_head { |
413d37d1 MH |
96 | struct trace_entry ent; |
97 | unsigned long ip; | |
413d37d1 MH |
98 | }; |
99 | ||
93ccae7a | 100 | struct kretprobe_trace_entry_head { |
413d37d1 MH |
101 | struct trace_entry ent; |
102 | unsigned long func; | |
103 | unsigned long ret_ip; | |
413d37d1 MH |
104 | }; |
105 | ||
fc5e27ae PP |
106 | /* |
107 | * trace_flag_type is an enumeration that holds different | |
108 | * states when a trace occurs. These are: | |
9244489a | 109 | * IRQS_OFF - interrupts were disabled |
9de36825 | 110 | * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags |
bd9cfca9 | 111 | * NEED_RESCHED - reschedule is requested |
9244489a SR |
112 | * HARDIRQ - inside an interrupt handler |
113 | * SOFTIRQ - inside a softirq handler | |
fc5e27ae PP |
114 | */ |
115 | enum trace_flag_type { | |
116 | TRACE_FLAG_IRQS_OFF = 0x01, | |
9244489a SR |
117 | TRACE_FLAG_IRQS_NOSUPPORT = 0x02, |
118 | TRACE_FLAG_NEED_RESCHED = 0x04, | |
119 | TRACE_FLAG_HARDIRQ = 0x08, | |
120 | TRACE_FLAG_SOFTIRQ = 0x10, | |
fc5e27ae PP |
121 | }; |
122 | ||
5bf9a1ee | 123 | #define TRACE_BUF_SIZE 1024 |
bc0c38d1 SR |
124 | |
125 | /* | |
126 | * The CPU trace array - it consists of thousands of trace entries | |
127 | * plus some other descriptor data: (for example which task started | |
128 | * the trace, etc.) | |
129 | */ | |
130 | struct trace_array_cpu { | |
bc0c38d1 | 131 | atomic_t disabled; |
2cadf913 | 132 | void *buffer_page; /* ring buffer spare */ |
4e3c3333 | 133 | |
bc0c38d1 SR |
134 | unsigned long saved_latency; |
135 | unsigned long critical_start; | |
136 | unsigned long critical_end; | |
137 | unsigned long critical_sequence; | |
138 | unsigned long nice; | |
139 | unsigned long policy; | |
140 | unsigned long rt_priority; | |
2f26ebd5 | 141 | unsigned long skipped_entries; |
bc0c38d1 SR |
142 | cycle_t preempt_timestamp; |
143 | pid_t pid; | |
144 | uid_t uid; | |
145 | char comm[TASK_COMM_LEN]; | |
146 | }; | |
147 | ||
bc0c38d1 SR |
148 | /* |
149 | * The trace array - an array of per-CPU trace arrays. This is the | |
150 | * highest level data structure that individual tracers deal with. | |
151 | * They have on/off state as well: | |
152 | */ | |
153 | struct trace_array { | |
3928a8a2 | 154 | struct ring_buffer *buffer; |
bc0c38d1 | 155 | unsigned long entries; |
bc0c38d1 | 156 | int cpu; |
499e5470 | 157 | int buffer_disabled; |
bc0c38d1 | 158 | cycle_t time_start; |
b3806b43 | 159 | struct task_struct *waiter; |
bc0c38d1 SR |
160 | struct trace_array_cpu *data[NR_CPUS]; |
161 | }; | |
162 | ||
7104f300 SR |
163 | #define FTRACE_CMP_TYPE(var, type) \ |
164 | __builtin_types_compatible_p(typeof(var), type *) | |
165 | ||
166 | #undef IF_ASSIGN | |
167 | #define IF_ASSIGN(var, entry, etype, id) \ | |
168 | if (FTRACE_CMP_TYPE(var, etype)) { \ | |
169 | var = (typeof(var))(entry); \ | |
170 | WARN_ON(id && (entry)->type != id); \ | |
171 | break; \ | |
172 | } | |
173 | ||
174 | /* Will cause compile errors if type is not found. */ | |
175 | extern void __ftrace_bad_type(void); | |
176 | ||
177 | /* | |
178 | * The trace_assign_type is a verifier that the entry type is | |
179 | * the same as the type being assigned. To add new types simply | |
180 | * add a line with the following format: | |
181 | * | |
182 | * IF_ASSIGN(var, ent, type, id); | |
183 | * | |
184 | * Where "type" is the trace type that includes the trace_entry | |
185 | * as the "ent" item. And "id" is the trace identifier that is | |
186 | * used in the trace_type enum. | |
187 | * | |
188 | * If the type can have more than one id, then use zero. | |
189 | */ | |
190 | #define trace_assign_type(var, ent) \ | |
191 | do { \ | |
192 | IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \ | |
193 | IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \ | |
7104f300 | 194 | IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \ |
02b67518 | 195 | IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\ |
7104f300 | 196 | IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \ |
48ead020 | 197 | IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \ |
7104f300 SR |
198 | IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \ |
199 | TRACE_MMIO_RW); \ | |
200 | IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \ | |
201 | TRACE_MMIO_MAP); \ | |
9f029e83 | 202 | IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \ |
287b6e68 FW |
203 | IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \ |
204 | TRACE_GRAPH_ENT); \ | |
205 | IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \ | |
206 | TRACE_GRAPH_RET); \ | |
7104f300 SR |
207 | __ftrace_bad_type(); \ |
208 | } while (0) | |
2c4f035f | 209 | |
adf9f195 FW |
210 | /* |
211 | * An option specific to a tracer. This is a boolean value. | |
212 | * The bit is the bit index that sets its value on the | |
213 | * flags value in struct tracer_flags. | |
214 | */ | |
215 | struct tracer_opt { | |
9de36825 IM |
216 | const char *name; /* Will appear on the trace_options file */ |
217 | u32 bit; /* Mask assigned in val field in tracer_flags */ | |
adf9f195 FW |
218 | }; |
219 | ||
220 | /* | |
221 | * The set of specific options for a tracer. Your tracer | |
222 | * have to set the initial value of the flags val. | |
223 | */ | |
224 | struct tracer_flags { | |
225 | u32 val; | |
9de36825 | 226 | struct tracer_opt *opts; |
adf9f195 FW |
227 | }; |
228 | ||
229 | /* Makes more easy to define a tracer opt */ | |
230 | #define TRACER_OPT(s, b) .name = #s, .bit = b | |
231 | ||
034939b6 | 232 | |
6eaaa5d5 FW |
233 | /** |
234 | * struct tracer - a specific tracer and its callbacks to interact with debugfs | |
235 | * @name: the name chosen to select it on the available_tracers file | |
236 | * @init: called when one switches to this tracer (echo name > current_tracer) | |
237 | * @reset: called when one switches to another tracer | |
238 | * @start: called when tracing is unpaused (echo 1 > tracing_enabled) | |
239 | * @stop: called when tracing is paused (echo 0 > tracing_enabled) | |
240 | * @open: called when the trace file is opened | |
241 | * @pipe_open: called when the trace_pipe file is opened | |
242 | * @wait_pipe: override how the user waits for traces on trace_pipe | |
243 | * @close: called when the trace file is released | |
c521efd1 | 244 | * @pipe_close: called when the trace_pipe file is released |
6eaaa5d5 FW |
245 | * @read: override the default read callback on trace_pipe |
246 | * @splice_read: override the default splice_read callback on trace_pipe | |
247 | * @selftest: selftest to run on boot (see trace_selftest.c) | |
248 | * @print_headers: override the first lines that describe your columns | |
249 | * @print_line: callback that prints a trace | |
250 | * @set_flag: signals one of your private flags changed (trace_options file) | |
251 | * @flags: your private flags | |
bc0c38d1 SR |
252 | */ |
253 | struct tracer { | |
254 | const char *name; | |
1c80025a | 255 | int (*init)(struct trace_array *tr); |
bc0c38d1 | 256 | void (*reset)(struct trace_array *tr); |
9036990d SR |
257 | void (*start)(struct trace_array *tr); |
258 | void (*stop)(struct trace_array *tr); | |
bc0c38d1 | 259 | void (*open)(struct trace_iterator *iter); |
107bad8b | 260 | void (*pipe_open)(struct trace_iterator *iter); |
6eaaa5d5 | 261 | void (*wait_pipe)(struct trace_iterator *iter); |
bc0c38d1 | 262 | void (*close)(struct trace_iterator *iter); |
c521efd1 | 263 | void (*pipe_close)(struct trace_iterator *iter); |
107bad8b SR |
264 | ssize_t (*read)(struct trace_iterator *iter, |
265 | struct file *filp, char __user *ubuf, | |
266 | size_t cnt, loff_t *ppos); | |
3c56819b EGM |
267 | ssize_t (*splice_read)(struct trace_iterator *iter, |
268 | struct file *filp, | |
269 | loff_t *ppos, | |
270 | struct pipe_inode_info *pipe, | |
271 | size_t len, | |
272 | unsigned int flags); | |
60a11774 SR |
273 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
274 | int (*selftest)(struct tracer *trace, | |
275 | struct trace_array *tr); | |
276 | #endif | |
8bba1bf5 | 277 | void (*print_header)(struct seq_file *m); |
2c4f035f | 278 | enum print_line_t (*print_line)(struct trace_iterator *iter); |
adf9f195 FW |
279 | /* If you handled the flag setting, return 0 */ |
280 | int (*set_flag)(u32 old_flags, u32 bit, int set); | |
bc0c38d1 | 281 | struct tracer *next; |
9de36825 | 282 | struct tracer_flags *flags; |
9a24470b | 283 | int print_max; |
ef710e10 | 284 | int use_max_tr; |
bc0c38d1 SR |
285 | }; |
286 | ||
f9520750 | 287 | |
e4a3f541 SR |
288 | /* Only current can touch trace_recursion */ |
289 | #define trace_recursion_inc() do { (current)->trace_recursion++; } while (0) | |
290 | #define trace_recursion_dec() do { (current)->trace_recursion--; } while (0) | |
291 | ||
292 | /* Ring buffer has the 10 LSB bits to count */ | |
293 | #define trace_recursion_buffer() ((current)->trace_recursion & 0x3ff) | |
294 | ||
295 | /* for function tracing recursion */ | |
296 | #define TRACE_INTERNAL_BIT (1<<11) | |
297 | #define TRACE_GLOBAL_BIT (1<<12) | |
e248491a JO |
298 | #define TRACE_CONTROL_BIT (1<<13) |
299 | ||
e4a3f541 SR |
300 | /* |
301 | * Abuse of the trace_recursion. | |
302 | * As we need a way to maintain state if we are tracing the function | |
303 | * graph in irq because we want to trace a particular function that | |
304 | * was called in irq context but we have irq tracing off. Since this | |
305 | * can only be modified by current, we can reuse trace_recursion. | |
306 | */ | |
307 | #define TRACE_IRQ_BIT (1<<13) | |
308 | ||
309 | #define trace_recursion_set(bit) do { (current)->trace_recursion |= (bit); } while (0) | |
310 | #define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(bit); } while (0) | |
311 | #define trace_recursion_test(bit) ((current)->trace_recursion & (bit)) | |
312 | ||
b04cc6b1 FW |
313 | #define TRACE_PIPE_ALL_CPU -1 |
314 | ||
b6f11df2 | 315 | int tracer_init(struct tracer *t, struct trace_array *tr); |
9036990d | 316 | int tracing_is_enabled(void); |
45dcd8b8 | 317 | void trace_wake_up(void); |
3928a8a2 | 318 | void tracing_reset(struct trace_array *tr, int cpu); |
213cc060 | 319 | void tracing_reset_online_cpus(struct trace_array *tr); |
9456f0fa SR |
320 | void tracing_reset_current(int cpu); |
321 | void tracing_reset_current_online_cpus(void); | |
bc0c38d1 | 322 | int tracing_open_generic(struct inode *inode, struct file *filp); |
5452af66 | 323 | struct dentry *trace_create_file(const char *name, |
f4ae40a6 | 324 | umode_t mode, |
5452af66 FW |
325 | struct dentry *parent, |
326 | void *data, | |
327 | const struct file_operations *fops); | |
328 | ||
bc0c38d1 | 329 | struct dentry *tracing_init_dentry(void); |
d618b3e6 | 330 | |
51a763dd ACM |
331 | struct ring_buffer_event; |
332 | ||
e77405ad SR |
333 | struct ring_buffer_event * |
334 | trace_buffer_lock_reserve(struct ring_buffer *buffer, | |
335 | int type, | |
336 | unsigned long len, | |
337 | unsigned long flags, | |
338 | int pc); | |
339 | void trace_buffer_unlock_commit(struct ring_buffer *buffer, | |
51a763dd ACM |
340 | struct ring_buffer_event *event, |
341 | unsigned long flags, int pc); | |
342 | ||
45dcd8b8 PP |
343 | struct trace_entry *tracing_get_trace_entry(struct trace_array *tr, |
344 | struct trace_array_cpu *data); | |
c4a8e8be FW |
345 | |
346 | struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, | |
347 | int *ent_cpu, u64 *ent_ts); | |
348 | ||
955b61e5 JW |
349 | int trace_empty(struct trace_iterator *iter); |
350 | ||
351 | void *trace_find_next_entry_inc(struct trace_iterator *iter); | |
352 | ||
353 | void trace_init_global_iter(struct trace_iterator *iter); | |
354 | ||
355 | void tracing_iter_reset(struct trace_iterator *iter, int cpu); | |
356 | ||
6eaaa5d5 FW |
357 | void default_wait_pipe(struct trace_iterator *iter); |
358 | void poll_wait_pipe(struct trace_iterator *iter); | |
359 | ||
bc0c38d1 SR |
360 | void ftrace(struct trace_array *tr, |
361 | struct trace_array_cpu *data, | |
362 | unsigned long ip, | |
363 | unsigned long parent_ip, | |
38697053 | 364 | unsigned long flags, int pc); |
bc0c38d1 | 365 | void tracing_sched_switch_trace(struct trace_array *tr, |
bc0c38d1 SR |
366 | struct task_struct *prev, |
367 | struct task_struct *next, | |
38697053 | 368 | unsigned long flags, int pc); |
57422797 IM |
369 | |
370 | void tracing_sched_wakeup_trace(struct trace_array *tr, | |
57422797 IM |
371 | struct task_struct *wakee, |
372 | struct task_struct *cur, | |
38697053 | 373 | unsigned long flags, int pc); |
6fb44b71 | 374 | void trace_function(struct trace_array *tr, |
6fb44b71 SR |
375 | unsigned long ip, |
376 | unsigned long parent_ip, | |
38697053 | 377 | unsigned long flags, int pc); |
0a772620 JO |
378 | void trace_graph_function(struct trace_array *tr, |
379 | unsigned long ip, | |
380 | unsigned long parent_ip, | |
381 | unsigned long flags, int pc); | |
7e9a49ef | 382 | void trace_latency_header(struct seq_file *m); |
62b915f1 JO |
383 | void trace_default_header(struct seq_file *m); |
384 | void print_trace_header(struct seq_file *m, struct trace_iterator *iter); | |
385 | int trace_empty(struct trace_iterator *iter); | |
bc0c38d1 | 386 | |
287b6e68 | 387 | void trace_graph_return(struct ftrace_graph_ret *trace); |
e49dc19c | 388 | int trace_graph_entry(struct ftrace_graph_ent *trace); |
1a0799a8 | 389 | void set_graph_array(struct trace_array *tr); |
1e9b51c2 | 390 | |
41bc8144 SR |
391 | void tracing_start_cmdline_record(void); |
392 | void tracing_stop_cmdline_record(void); | |
e168e051 SR |
393 | void tracing_sched_switch_assign_trace(struct trace_array *tr); |
394 | void tracing_stop_sched_switch_record(void); | |
395 | void tracing_start_sched_switch_record(void); | |
bc0c38d1 SR |
396 | int register_tracer(struct tracer *type); |
397 | void unregister_tracer(struct tracer *type); | |
b5130b1e | 398 | int is_tracing_stopped(void); |
955b61e5 JW |
399 | enum trace_file_type { |
400 | TRACE_FILE_LAT_FMT = 1, | |
401 | TRACE_FILE_ANNOTATE = 2, | |
402 | }; | |
403 | ||
404 | extern cpumask_var_t __read_mostly tracing_buffer_mask; | |
405 | ||
406 | #define for_each_tracing_cpu(cpu) \ | |
407 | for_each_cpu(cpu, tracing_buffer_mask) | |
bc0c38d1 SR |
408 | |
409 | extern unsigned long nsecs_to_usecs(unsigned long nsecs); | |
410 | ||
0e950173 TB |
411 | extern unsigned long tracing_thresh; |
412 | ||
5d4a9dba | 413 | #ifdef CONFIG_TRACER_MAX_TRACE |
bc0c38d1 | 414 | extern unsigned long tracing_max_latency; |
bc0c38d1 SR |
415 | |
416 | void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); | |
417 | void update_max_tr_single(struct trace_array *tr, | |
418 | struct task_struct *tsk, int cpu); | |
5d4a9dba | 419 | #endif /* CONFIG_TRACER_MAX_TRACE */ |
bc0c38d1 | 420 | |
c0a0d0d3 | 421 | #ifdef CONFIG_STACKTRACE |
e77405ad | 422 | void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
423 | int skip, int pc); |
424 | ||
1fd8df2c MH |
425 | void ftrace_trace_stack_regs(struct ring_buffer *buffer, unsigned long flags, |
426 | int skip, int pc, struct pt_regs *regs); | |
427 | ||
e77405ad | 428 | void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
429 | int pc); |
430 | ||
431 | void __trace_stack(struct trace_array *tr, unsigned long flags, int skip, | |
432 | int pc); | |
433 | #else | |
e1f7992e | 434 | static inline void ftrace_trace_stack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
435 | unsigned long flags, int skip, int pc) |
436 | { | |
437 | } | |
438 | ||
1fd8df2c MH |
439 | static inline void ftrace_trace_stack_regs(struct ring_buffer *buffer, |
440 | unsigned long flags, int skip, | |
441 | int pc, struct pt_regs *regs) | |
442 | { | |
443 | } | |
444 | ||
e1f7992e | 445 | static inline void ftrace_trace_userstack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
446 | unsigned long flags, int pc) |
447 | { | |
448 | } | |
449 | ||
450 | static inline void __trace_stack(struct trace_array *tr, unsigned long flags, | |
451 | int skip, int pc) | |
452 | { | |
453 | } | |
454 | #endif /* CONFIG_STACKTRACE */ | |
53614991 | 455 | |
e309b41d | 456 | extern cycle_t ftrace_now(int cpu); |
bc0c38d1 | 457 | |
4ca53085 | 458 | extern void trace_find_cmdline(int pid, char comm[]); |
f7d48cbd | 459 | |
bc0c38d1 SR |
460 | #ifdef CONFIG_DYNAMIC_FTRACE |
461 | extern unsigned long ftrace_update_tot_cnt; | |
d05cdb25 SR |
462 | #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func |
463 | extern int DYN_FTRACE_TEST_NAME(void); | |
95950c2e SR |
464 | #define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2 |
465 | extern int DYN_FTRACE_TEST_NAME2(void); | |
bc0c38d1 SR |
466 | #endif |
467 | ||
020e5f85 LZ |
468 | extern int ring_buffer_expanded; |
469 | extern bool tracing_selftest_disabled; | |
9288f99a | 470 | DECLARE_PER_CPU(int, ftrace_cpu_disabled); |
020e5f85 | 471 | |
60a11774 | 472 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
60a11774 SR |
473 | extern int trace_selftest_startup_function(struct tracer *trace, |
474 | struct trace_array *tr); | |
7447dce9 FW |
475 | extern int trace_selftest_startup_function_graph(struct tracer *trace, |
476 | struct trace_array *tr); | |
60a11774 SR |
477 | extern int trace_selftest_startup_irqsoff(struct tracer *trace, |
478 | struct trace_array *tr); | |
60a11774 SR |
479 | extern int trace_selftest_startup_preemptoff(struct tracer *trace, |
480 | struct trace_array *tr); | |
60a11774 SR |
481 | extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace, |
482 | struct trace_array *tr); | |
60a11774 SR |
483 | extern int trace_selftest_startup_wakeup(struct tracer *trace, |
484 | struct trace_array *tr); | |
fb1b6d8b SN |
485 | extern int trace_selftest_startup_nop(struct tracer *trace, |
486 | struct trace_array *tr); | |
60a11774 SR |
487 | extern int trace_selftest_startup_sched_switch(struct tracer *trace, |
488 | struct trace_array *tr); | |
80e5ea45 SR |
489 | extern int trace_selftest_startup_branch(struct tracer *trace, |
490 | struct trace_array *tr); | |
60a11774 SR |
491 | #endif /* CONFIG_FTRACE_STARTUP_TEST */ |
492 | ||
c7aafc54 | 493 | extern void *head_page(struct trace_array_cpu *data); |
cf8e3474 | 494 | extern unsigned long long ns2usecs(cycle_t nsec); |
1fd8f2a3 | 495 | extern int |
40ce74f1 | 496 | trace_vbprintk(unsigned long ip, const char *fmt, va_list args); |
48ead020 | 497 | extern int |
40ce74f1 | 498 | trace_vprintk(unsigned long ip, const char *fmt, va_list args); |
659372d3 SR |
499 | extern int |
500 | trace_array_vprintk(struct trace_array *tr, | |
501 | unsigned long ip, const char *fmt, va_list args); | |
502 | int trace_array_printk(struct trace_array *tr, | |
503 | unsigned long ip, const char *fmt, ...); | |
955b61e5 JW |
504 | void trace_printk_seq(struct trace_seq *s); |
505 | enum print_line_t print_trace_line(struct trace_iterator *iter); | |
c7aafc54 | 506 | |
4e655519 IM |
507 | extern unsigned long trace_flags; |
508 | ||
5079f326 Z |
509 | extern int trace_clock_id; |
510 | ||
15e6cb36 | 511 | /* Standard output formatting function used for function return traces */ |
fb52607a | 512 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
62b915f1 JO |
513 | |
514 | /* Flag options */ | |
515 | #define TRACE_GRAPH_PRINT_OVERRUN 0x1 | |
516 | #define TRACE_GRAPH_PRINT_CPU 0x2 | |
517 | #define TRACE_GRAPH_PRINT_OVERHEAD 0x4 | |
518 | #define TRACE_GRAPH_PRINT_PROC 0x8 | |
519 | #define TRACE_GRAPH_PRINT_DURATION 0x10 | |
520 | #define TRACE_GRAPH_PRINT_ABS_TIME 0x20 | |
521 | ||
d7a8d9e9 JO |
522 | extern enum print_line_t |
523 | print_graph_function_flags(struct trace_iterator *iter, u32 flags); | |
524 | extern void print_graph_headers_flags(struct seq_file *s, u32 flags); | |
0706f1c4 SR |
525 | extern enum print_line_t |
526 | trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); | |
62b915f1 JO |
527 | extern void graph_trace_open(struct trace_iterator *iter); |
528 | extern void graph_trace_close(struct trace_iterator *iter); | |
529 | extern int __trace_graph_entry(struct trace_array *tr, | |
530 | struct ftrace_graph_ent *trace, | |
531 | unsigned long flags, int pc); | |
532 | extern void __trace_graph_return(struct trace_array *tr, | |
533 | struct ftrace_graph_ret *trace, | |
534 | unsigned long flags, int pc); | |
535 | ||
ea4e2bc4 SR |
536 | |
537 | #ifdef CONFIG_DYNAMIC_FTRACE | |
538 | /* TODO: make this variable */ | |
539 | #define FTRACE_GRAPH_MAX_FUNCS 32 | |
c7c6b1fe | 540 | extern int ftrace_graph_filter_enabled; |
ea4e2bc4 SR |
541 | extern int ftrace_graph_count; |
542 | extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS]; | |
543 | ||
544 | static inline int ftrace_graph_addr(unsigned long addr) | |
545 | { | |
546 | int i; | |
547 | ||
c7c6b1fe | 548 | if (!ftrace_graph_filter_enabled) |
ea4e2bc4 SR |
549 | return 1; |
550 | ||
551 | for (i = 0; i < ftrace_graph_count; i++) { | |
e4a3f541 SR |
552 | if (addr == ftrace_graph_funcs[i]) { |
553 | /* | |
554 | * If no irqs are to be traced, but a set_graph_function | |
555 | * is set, and called by an interrupt handler, we still | |
556 | * want to trace it. | |
557 | */ | |
558 | if (in_irq()) | |
559 | trace_recursion_set(TRACE_IRQ_BIT); | |
560 | else | |
561 | trace_recursion_clear(TRACE_IRQ_BIT); | |
ea4e2bc4 | 562 | return 1; |
e4a3f541 | 563 | } |
ea4e2bc4 SR |
564 | } |
565 | ||
566 | return 0; | |
567 | } | |
15e6cb36 | 568 | #else |
6b253930 IM |
569 | static inline int ftrace_graph_addr(unsigned long addr) |
570 | { | |
571 | return 1; | |
ea4e2bc4 SR |
572 | } |
573 | #endif /* CONFIG_DYNAMIC_FTRACE */ | |
ea4e2bc4 | 574 | #else /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 575 | static inline enum print_line_t |
d7a8d9e9 | 576 | print_graph_function_flags(struct trace_iterator *iter, u32 flags) |
15e6cb36 FW |
577 | { |
578 | return TRACE_TYPE_UNHANDLED; | |
579 | } | |
ea4e2bc4 | 580 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 581 | |
756d17ee | 582 | extern struct list_head ftrace_pids; |
804a6851 | 583 | |
1155de47 | 584 | #ifdef CONFIG_FUNCTION_TRACER |
804a6851 SR |
585 | static inline int ftrace_trace_task(struct task_struct *task) |
586 | { | |
756d17ee | 587 | if (list_empty(&ftrace_pids)) |
804a6851 SR |
588 | return 1; |
589 | ||
590 | return test_tsk_trace_trace(task); | |
591 | } | |
e0a413f6 | 592 | extern int ftrace_is_dead(void); |
1155de47 PM |
593 | #else |
594 | static inline int ftrace_trace_task(struct task_struct *task) | |
595 | { | |
596 | return 1; | |
597 | } | |
e0a413f6 | 598 | static inline int ftrace_is_dead(void) { return 0; } |
1155de47 | 599 | #endif |
804a6851 | 600 | |
ced39002 JO |
601 | int ftrace_event_is_function(struct ftrace_event_call *call); |
602 | ||
b63f39ea | 603 | /* |
604 | * struct trace_parser - servers for reading the user input separated by spaces | |
605 | * @cont: set if the input is not complete - no final space char was found | |
606 | * @buffer: holds the parsed user input | |
1537a363 | 607 | * @idx: user input length |
b63f39ea | 608 | * @size: buffer size |
609 | */ | |
610 | struct trace_parser { | |
611 | bool cont; | |
612 | char *buffer; | |
613 | unsigned idx; | |
614 | unsigned size; | |
615 | }; | |
616 | ||
617 | static inline bool trace_parser_loaded(struct trace_parser *parser) | |
618 | { | |
619 | return (parser->idx != 0); | |
620 | } | |
621 | ||
622 | static inline bool trace_parser_cont(struct trace_parser *parser) | |
623 | { | |
624 | return parser->cont; | |
625 | } | |
626 | ||
627 | static inline void trace_parser_clear(struct trace_parser *parser) | |
628 | { | |
629 | parser->cont = false; | |
630 | parser->idx = 0; | |
631 | } | |
632 | ||
633 | extern int trace_parser_get_init(struct trace_parser *parser, int size); | |
634 | extern void trace_parser_put(struct trace_parser *parser); | |
635 | extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf, | |
636 | size_t cnt, loff_t *ppos); | |
637 | ||
4fcdae83 SR |
638 | /* |
639 | * trace_iterator_flags is an enumeration that defines bit | |
640 | * positions into trace_flags that controls the output. | |
641 | * | |
642 | * NOTE: These bits must match the trace_options array in | |
643 | * trace.c. | |
644 | */ | |
4e655519 IM |
645 | enum trace_iterator_flags { |
646 | TRACE_ITER_PRINT_PARENT = 0x01, | |
647 | TRACE_ITER_SYM_OFFSET = 0x02, | |
648 | TRACE_ITER_SYM_ADDR = 0x04, | |
649 | TRACE_ITER_VERBOSE = 0x08, | |
650 | TRACE_ITER_RAW = 0x10, | |
651 | TRACE_ITER_HEX = 0x20, | |
652 | TRACE_ITER_BIN = 0x40, | |
653 | TRACE_ITER_BLOCK = 0x80, | |
654 | TRACE_ITER_STACKTRACE = 0x100, | |
2cbafd68 LZ |
655 | TRACE_ITER_PRINTK = 0x200, |
656 | TRACE_ITER_PREEMPTONLY = 0x400, | |
657 | TRACE_ITER_BRANCH = 0x800, | |
658 | TRACE_ITER_ANNOTATE = 0x1000, | |
659 | TRACE_ITER_USERSTACKTRACE = 0x2000, | |
660 | TRACE_ITER_SYM_USEROBJ = 0x4000, | |
661 | TRACE_ITER_PRINTK_MSGONLY = 0x8000, | |
662 | TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */ | |
663 | TRACE_ITER_LATENCY_FMT = 0x20000, | |
664 | TRACE_ITER_SLEEP_TIME = 0x40000, | |
665 | TRACE_ITER_GRAPH_TIME = 0x80000, | |
e870e9a1 | 666 | TRACE_ITER_RECORD_CMD = 0x100000, |
750912fa | 667 | TRACE_ITER_OVERWRITE = 0x200000, |
cf30cf67 | 668 | TRACE_ITER_STOP_ON_FREE = 0x400000, |
77271ce4 | 669 | TRACE_ITER_IRQ_INFO = 0x800000, |
4e655519 IM |
670 | }; |
671 | ||
15e6cb36 FW |
672 | /* |
673 | * TRACE_ITER_SYM_MASK masks the options in trace_flags that | |
674 | * control the output of kernel symbols. | |
675 | */ | |
676 | #define TRACE_ITER_SYM_MASK \ | |
677 | (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR) | |
678 | ||
43a15386 FW |
679 | extern struct tracer nop_trace; |
680 | ||
2ed84eeb | 681 | #ifdef CONFIG_BRANCH_TRACER |
9f029e83 SR |
682 | extern int enable_branch_tracing(struct trace_array *tr); |
683 | extern void disable_branch_tracing(void); | |
684 | static inline int trace_branch_enable(struct trace_array *tr) | |
52f232cb | 685 | { |
9f029e83 SR |
686 | if (trace_flags & TRACE_ITER_BRANCH) |
687 | return enable_branch_tracing(tr); | |
52f232cb SR |
688 | return 0; |
689 | } | |
9f029e83 | 690 | static inline void trace_branch_disable(void) |
52f232cb SR |
691 | { |
692 | /* due to races, always disable */ | |
9f029e83 | 693 | disable_branch_tracing(); |
52f232cb SR |
694 | } |
695 | #else | |
9f029e83 | 696 | static inline int trace_branch_enable(struct trace_array *tr) |
52f232cb SR |
697 | { |
698 | return 0; | |
699 | } | |
9f029e83 | 700 | static inline void trace_branch_disable(void) |
52f232cb SR |
701 | { |
702 | } | |
2ed84eeb | 703 | #endif /* CONFIG_BRANCH_TRACER */ |
52f232cb | 704 | |
1852fcce SR |
705 | /* set ring buffers to default size if not already done so */ |
706 | int tracing_update_buffers(void); | |
707 | ||
fd994989 SR |
708 | /* trace event type bit fields, not numeric */ |
709 | enum { | |
710 | TRACE_EVENT_TYPE_PRINTF = 1, | |
711 | TRACE_EVENT_TYPE_RAW = 2, | |
712 | }; | |
713 | ||
cf027f64 TZ |
714 | struct ftrace_event_field { |
715 | struct list_head link; | |
716 | char *name; | |
717 | char *type; | |
aa38e9fc | 718 | int filter_type; |
cf027f64 TZ |
719 | int offset; |
720 | int size; | |
a118e4d1 | 721 | int is_signed; |
cf027f64 TZ |
722 | }; |
723 | ||
30e673b2 | 724 | struct event_filter { |
c9c53ca0 SR |
725 | int n_preds; /* Number assigned */ |
726 | int a_preds; /* allocated */ | |
74e9e58c | 727 | struct filter_pred *preds; |
61e9dea2 | 728 | struct filter_pred *root; |
8b372562 | 729 | char *filter_string; |
30e673b2 TZ |
730 | }; |
731 | ||
cfb180f3 TZ |
732 | struct event_subsystem { |
733 | struct list_head list; | |
734 | const char *name; | |
735 | struct dentry *entry; | |
1f9963cb | 736 | struct event_filter *filter; |
dc82ec98 | 737 | int nr_events; |
e9dbfae5 | 738 | int ref_count; |
cfb180f3 TZ |
739 | }; |
740 | ||
61e9dea2 SR |
741 | #define FILTER_PRED_INVALID ((unsigned short)-1) |
742 | #define FILTER_PRED_IS_RIGHT (1 << 15) | |
43cd4145 | 743 | #define FILTER_PRED_FOLD (1 << 15) |
61e9dea2 | 744 | |
bf93f9ed SR |
745 | /* |
746 | * The max preds is the size of unsigned short with | |
747 | * two flags at the MSBs. One bit is used for both the IS_RIGHT | |
748 | * and FOLD flags. The other is reserved. | |
749 | * | |
750 | * 2^14 preds is way more than enough. | |
751 | */ | |
752 | #define MAX_FILTER_PRED 16384 | |
4a3d27e9 | 753 | |
7ce7e424 | 754 | struct filter_pred; |
1889d209 | 755 | struct regex; |
7ce7e424 | 756 | |
58d9a597 | 757 | typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event); |
7ce7e424 | 758 | |
1889d209 FW |
759 | typedef int (*regex_match_func)(char *str, struct regex *r, int len); |
760 | ||
3f6fe06d | 761 | enum regex_type { |
b0f1a59a | 762 | MATCH_FULL = 0, |
3f6fe06d FW |
763 | MATCH_FRONT_ONLY, |
764 | MATCH_MIDDLE_ONLY, | |
765 | MATCH_END_ONLY, | |
766 | }; | |
767 | ||
1889d209 FW |
768 | struct regex { |
769 | char pattern[MAX_FILTER_STR_VAL]; | |
770 | int len; | |
771 | int field_len; | |
772 | regex_match_func match; | |
773 | }; | |
774 | ||
7ce7e424 | 775 | struct filter_pred { |
1889d209 FW |
776 | filter_pred_fn_t fn; |
777 | u64 val; | |
778 | struct regex regex; | |
61aaef55 | 779 | unsigned short *ops; |
1d0e78e3 | 780 | struct ftrace_event_field *field; |
1889d209 FW |
781 | int offset; |
782 | int not; | |
783 | int op; | |
61e9dea2 SR |
784 | unsigned short index; |
785 | unsigned short parent; | |
786 | unsigned short left; | |
787 | unsigned short right; | |
7ce7e424 TZ |
788 | }; |
789 | ||
8728fe50 LZ |
790 | extern struct list_head ftrace_common_fields; |
791 | ||
3f6fe06d FW |
792 | extern enum regex_type |
793 | filter_parse_regex(char *buff, int len, char **search, int *not); | |
8b372562 | 794 | extern void print_event_filter(struct ftrace_event_call *call, |
4bda2d51 | 795 | struct trace_seq *s); |
8b372562 TZ |
796 | extern int apply_event_filter(struct ftrace_event_call *call, |
797 | char *filter_string); | |
798 | extern int apply_subsystem_event_filter(struct event_subsystem *system, | |
799 | char *filter_string); | |
800 | extern void print_subsystem_event_filter(struct event_subsystem *system, | |
ac1adc55 | 801 | struct trace_seq *s); |
aa38e9fc | 802 | extern int filter_assign_type(const char *type); |
7ce7e424 | 803 | |
2e33af02 SR |
804 | struct list_head * |
805 | trace_get_fields(struct ftrace_event_call *event_call); | |
806 | ||
eb02ce01 | 807 | static inline int |
e1112b4d | 808 | filter_check_discard(struct ftrace_event_call *call, void *rec, |
eb02ce01 | 809 | struct ring_buffer *buffer, |
e1112b4d TZ |
810 | struct ring_buffer_event *event) |
811 | { | |
553552ce | 812 | if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) && |
6fb2915d | 813 | !filter_match_preds(call->filter, rec)) { |
eb02ce01 TZ |
814 | ring_buffer_discard_commit(buffer, event); |
815 | return 1; | |
816 | } | |
817 | ||
818 | return 0; | |
e1112b4d TZ |
819 | } |
820 | ||
e870e9a1 LZ |
821 | extern void trace_event_enable_cmd_record(bool enable); |
822 | ||
20c8928a | 823 | extern struct mutex event_mutex; |
a59fd602 | 824 | extern struct list_head ftrace_events; |
ac199db0 | 825 | |
e9fb2b6d SR |
826 | extern const char *__start___trace_bprintk_fmt[]; |
827 | extern const char *__stop___trace_bprintk_fmt[]; | |
828 | ||
4e5292ea | 829 | #undef FTRACE_ENTRY |
02aa3162 | 830 | #define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \ |
86c38a31 JM |
831 | extern struct ftrace_event_call \ |
832 | __attribute__((__aligned__(4))) event_##call; | |
4e5292ea | 833 | #undef FTRACE_ENTRY_DUP |
02aa3162 JO |
834 | #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print, filter) \ |
835 | FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print), \ | |
836 | filter) | |
4e5292ea | 837 | #include "trace_entries.h" |
e1112b4d | 838 | |
ced39002 JO |
839 | #ifdef CONFIG_FUNCTION_TRACER |
840 | int perf_ftrace_event_register(struct ftrace_event_call *call, | |
841 | enum trace_reg type, void *data); | |
842 | #else | |
843 | #define perf_ftrace_event_register NULL | |
844 | #endif /* CONFIG_FUNCTION_TRACER */ | |
ced39002 | 845 | |
bc0c38d1 | 846 | #endif /* _LINUX_KERNEL_TRACE_H */ |