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