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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 | ||
f3f096cf SD |
106 | struct uprobe_trace_entry_head { |
107 | struct trace_entry ent; | |
108 | unsigned long ip; | |
109 | }; | |
110 | ||
fc5e27ae PP |
111 | /* |
112 | * trace_flag_type is an enumeration that holds different | |
113 | * states when a trace occurs. These are: | |
9244489a | 114 | * IRQS_OFF - interrupts were disabled |
9de36825 | 115 | * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags |
bd9cfca9 | 116 | * NEED_RESCHED - reschedule is requested |
9244489a SR |
117 | * HARDIRQ - inside an interrupt handler |
118 | * SOFTIRQ - inside a softirq handler | |
fc5e27ae PP |
119 | */ |
120 | enum trace_flag_type { | |
121 | TRACE_FLAG_IRQS_OFF = 0x01, | |
9244489a SR |
122 | TRACE_FLAG_IRQS_NOSUPPORT = 0x02, |
123 | TRACE_FLAG_NEED_RESCHED = 0x04, | |
124 | TRACE_FLAG_HARDIRQ = 0x08, | |
125 | TRACE_FLAG_SOFTIRQ = 0x10, | |
fc5e27ae PP |
126 | }; |
127 | ||
5bf9a1ee | 128 | #define TRACE_BUF_SIZE 1024 |
bc0c38d1 SR |
129 | |
130 | /* | |
131 | * The CPU trace array - it consists of thousands of trace entries | |
132 | * plus some other descriptor data: (for example which task started | |
133 | * the trace, etc.) | |
134 | */ | |
135 | struct trace_array_cpu { | |
bc0c38d1 | 136 | atomic_t disabled; |
2cadf913 | 137 | void *buffer_page; /* ring buffer spare */ |
4e3c3333 | 138 | |
438ced17 | 139 | unsigned long entries; |
bc0c38d1 SR |
140 | unsigned long saved_latency; |
141 | unsigned long critical_start; | |
142 | unsigned long critical_end; | |
143 | unsigned long critical_sequence; | |
144 | unsigned long nice; | |
145 | unsigned long policy; | |
146 | unsigned long rt_priority; | |
2f26ebd5 | 147 | unsigned long skipped_entries; |
bc0c38d1 SR |
148 | cycle_t preempt_timestamp; |
149 | pid_t pid; | |
150 | uid_t uid; | |
151 | char comm[TASK_COMM_LEN]; | |
152 | }; | |
153 | ||
bc0c38d1 SR |
154 | /* |
155 | * The trace array - an array of per-CPU trace arrays. This is the | |
156 | * highest level data structure that individual tracers deal with. | |
157 | * They have on/off state as well: | |
158 | */ | |
159 | struct trace_array { | |
3928a8a2 | 160 | struct ring_buffer *buffer; |
bc0c38d1 | 161 | int cpu; |
499e5470 | 162 | int buffer_disabled; |
bc0c38d1 | 163 | cycle_t time_start; |
b3806b43 | 164 | struct task_struct *waiter; |
bc0c38d1 SR |
165 | struct trace_array_cpu *data[NR_CPUS]; |
166 | }; | |
167 | ||
7104f300 SR |
168 | #define FTRACE_CMP_TYPE(var, type) \ |
169 | __builtin_types_compatible_p(typeof(var), type *) | |
170 | ||
171 | #undef IF_ASSIGN | |
172 | #define IF_ASSIGN(var, entry, etype, id) \ | |
173 | if (FTRACE_CMP_TYPE(var, etype)) { \ | |
174 | var = (typeof(var))(entry); \ | |
175 | WARN_ON(id && (entry)->type != id); \ | |
176 | break; \ | |
177 | } | |
178 | ||
179 | /* Will cause compile errors if type is not found. */ | |
180 | extern void __ftrace_bad_type(void); | |
181 | ||
182 | /* | |
183 | * The trace_assign_type is a verifier that the entry type is | |
184 | * the same as the type being assigned. To add new types simply | |
185 | * add a line with the following format: | |
186 | * | |
187 | * IF_ASSIGN(var, ent, type, id); | |
188 | * | |
189 | * Where "type" is the trace type that includes the trace_entry | |
190 | * as the "ent" item. And "id" is the trace identifier that is | |
191 | * used in the trace_type enum. | |
192 | * | |
193 | * If the type can have more than one id, then use zero. | |
194 | */ | |
195 | #define trace_assign_type(var, ent) \ | |
196 | do { \ | |
197 | IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \ | |
198 | IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \ | |
7104f300 | 199 | IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \ |
02b67518 | 200 | IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\ |
7104f300 | 201 | IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \ |
48ead020 | 202 | IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \ |
7104f300 SR |
203 | IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \ |
204 | TRACE_MMIO_RW); \ | |
205 | IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \ | |
206 | TRACE_MMIO_MAP); \ | |
9f029e83 | 207 | IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \ |
287b6e68 FW |
208 | IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \ |
209 | TRACE_GRAPH_ENT); \ | |
210 | IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \ | |
211 | TRACE_GRAPH_RET); \ | |
7104f300 SR |
212 | __ftrace_bad_type(); \ |
213 | } while (0) | |
2c4f035f | 214 | |
adf9f195 FW |
215 | /* |
216 | * An option specific to a tracer. This is a boolean value. | |
217 | * The bit is the bit index that sets its value on the | |
218 | * flags value in struct tracer_flags. | |
219 | */ | |
220 | struct tracer_opt { | |
9de36825 IM |
221 | const char *name; /* Will appear on the trace_options file */ |
222 | u32 bit; /* Mask assigned in val field in tracer_flags */ | |
adf9f195 FW |
223 | }; |
224 | ||
225 | /* | |
226 | * The set of specific options for a tracer. Your tracer | |
227 | * have to set the initial value of the flags val. | |
228 | */ | |
229 | struct tracer_flags { | |
230 | u32 val; | |
9de36825 | 231 | struct tracer_opt *opts; |
adf9f195 FW |
232 | }; |
233 | ||
234 | /* Makes more easy to define a tracer opt */ | |
235 | #define TRACER_OPT(s, b) .name = #s, .bit = b | |
236 | ||
034939b6 | 237 | |
6eaaa5d5 FW |
238 | /** |
239 | * struct tracer - a specific tracer and its callbacks to interact with debugfs | |
240 | * @name: the name chosen to select it on the available_tracers file | |
241 | * @init: called when one switches to this tracer (echo name > current_tracer) | |
242 | * @reset: called when one switches to another tracer | |
243 | * @start: called when tracing is unpaused (echo 1 > tracing_enabled) | |
244 | * @stop: called when tracing is paused (echo 0 > tracing_enabled) | |
245 | * @open: called when the trace file is opened | |
246 | * @pipe_open: called when the trace_pipe file is opened | |
247 | * @wait_pipe: override how the user waits for traces on trace_pipe | |
248 | * @close: called when the trace file is released | |
c521efd1 | 249 | * @pipe_close: called when the trace_pipe file is released |
6eaaa5d5 FW |
250 | * @read: override the default read callback on trace_pipe |
251 | * @splice_read: override the default splice_read callback on trace_pipe | |
252 | * @selftest: selftest to run on boot (see trace_selftest.c) | |
253 | * @print_headers: override the first lines that describe your columns | |
254 | * @print_line: callback that prints a trace | |
255 | * @set_flag: signals one of your private flags changed (trace_options file) | |
256 | * @flags: your private flags | |
bc0c38d1 SR |
257 | */ |
258 | struct tracer { | |
259 | const char *name; | |
1c80025a | 260 | int (*init)(struct trace_array *tr); |
bc0c38d1 | 261 | void (*reset)(struct trace_array *tr); |
9036990d SR |
262 | void (*start)(struct trace_array *tr); |
263 | void (*stop)(struct trace_array *tr); | |
bc0c38d1 | 264 | void (*open)(struct trace_iterator *iter); |
107bad8b | 265 | void (*pipe_open)(struct trace_iterator *iter); |
6eaaa5d5 | 266 | void (*wait_pipe)(struct trace_iterator *iter); |
bc0c38d1 | 267 | void (*close)(struct trace_iterator *iter); |
c521efd1 | 268 | void (*pipe_close)(struct trace_iterator *iter); |
107bad8b SR |
269 | ssize_t (*read)(struct trace_iterator *iter, |
270 | struct file *filp, char __user *ubuf, | |
271 | size_t cnt, loff_t *ppos); | |
3c56819b EGM |
272 | ssize_t (*splice_read)(struct trace_iterator *iter, |
273 | struct file *filp, | |
274 | loff_t *ppos, | |
275 | struct pipe_inode_info *pipe, | |
276 | size_t len, | |
277 | unsigned int flags); | |
60a11774 SR |
278 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
279 | int (*selftest)(struct tracer *trace, | |
280 | struct trace_array *tr); | |
281 | #endif | |
8bba1bf5 | 282 | void (*print_header)(struct seq_file *m); |
2c4f035f | 283 | enum print_line_t (*print_line)(struct trace_iterator *iter); |
adf9f195 FW |
284 | /* If you handled the flag setting, return 0 */ |
285 | int (*set_flag)(u32 old_flags, u32 bit, int set); | |
bc0c38d1 | 286 | struct tracer *next; |
9de36825 | 287 | struct tracer_flags *flags; |
9a24470b | 288 | int print_max; |
ef710e10 | 289 | int use_max_tr; |
bc0c38d1 SR |
290 | }; |
291 | ||
f9520750 | 292 | |
e4a3f541 SR |
293 | /* Only current can touch trace_recursion */ |
294 | #define trace_recursion_inc() do { (current)->trace_recursion++; } while (0) | |
295 | #define trace_recursion_dec() do { (current)->trace_recursion--; } while (0) | |
296 | ||
297 | /* Ring buffer has the 10 LSB bits to count */ | |
298 | #define trace_recursion_buffer() ((current)->trace_recursion & 0x3ff) | |
299 | ||
300 | /* for function tracing recursion */ | |
301 | #define TRACE_INTERNAL_BIT (1<<11) | |
302 | #define TRACE_GLOBAL_BIT (1<<12) | |
e248491a JO |
303 | #define TRACE_CONTROL_BIT (1<<13) |
304 | ||
e4a3f541 SR |
305 | /* |
306 | * Abuse of the trace_recursion. | |
307 | * As we need a way to maintain state if we are tracing the function | |
308 | * graph in irq because we want to trace a particular function that | |
309 | * was called in irq context but we have irq tracing off. Since this | |
310 | * can only be modified by current, we can reuse trace_recursion. | |
311 | */ | |
312 | #define TRACE_IRQ_BIT (1<<13) | |
313 | ||
314 | #define trace_recursion_set(bit) do { (current)->trace_recursion |= (bit); } while (0) | |
315 | #define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(bit); } while (0) | |
316 | #define trace_recursion_test(bit) ((current)->trace_recursion & (bit)) | |
317 | ||
b04cc6b1 FW |
318 | #define TRACE_PIPE_ALL_CPU -1 |
319 | ||
b6f11df2 | 320 | int tracer_init(struct tracer *t, struct trace_array *tr); |
9036990d | 321 | int tracing_is_enabled(void); |
45dcd8b8 | 322 | void trace_wake_up(void); |
3928a8a2 | 323 | void tracing_reset(struct trace_array *tr, int cpu); |
213cc060 | 324 | void tracing_reset_online_cpus(struct trace_array *tr); |
9456f0fa SR |
325 | void tracing_reset_current(int cpu); |
326 | void tracing_reset_current_online_cpus(void); | |
bc0c38d1 | 327 | int tracing_open_generic(struct inode *inode, struct file *filp); |
5452af66 | 328 | struct dentry *trace_create_file(const char *name, |
f4ae40a6 | 329 | umode_t mode, |
5452af66 FW |
330 | struct dentry *parent, |
331 | void *data, | |
332 | const struct file_operations *fops); | |
333 | ||
bc0c38d1 | 334 | struct dentry *tracing_init_dentry(void); |
d618b3e6 | 335 | |
51a763dd ACM |
336 | struct ring_buffer_event; |
337 | ||
e77405ad SR |
338 | struct ring_buffer_event * |
339 | trace_buffer_lock_reserve(struct ring_buffer *buffer, | |
340 | int type, | |
341 | unsigned long len, | |
342 | unsigned long flags, | |
343 | int pc); | |
344 | void trace_buffer_unlock_commit(struct ring_buffer *buffer, | |
51a763dd ACM |
345 | struct ring_buffer_event *event, |
346 | unsigned long flags, int pc); | |
347 | ||
45dcd8b8 PP |
348 | struct trace_entry *tracing_get_trace_entry(struct trace_array *tr, |
349 | struct trace_array_cpu *data); | |
c4a8e8be FW |
350 | |
351 | struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, | |
352 | int *ent_cpu, u64 *ent_ts); | |
353 | ||
955b61e5 JW |
354 | int trace_empty(struct trace_iterator *iter); |
355 | ||
356 | void *trace_find_next_entry_inc(struct trace_iterator *iter); | |
357 | ||
358 | void trace_init_global_iter(struct trace_iterator *iter); | |
359 | ||
360 | void tracing_iter_reset(struct trace_iterator *iter, int cpu); | |
361 | ||
6eaaa5d5 FW |
362 | void default_wait_pipe(struct trace_iterator *iter); |
363 | void poll_wait_pipe(struct trace_iterator *iter); | |
364 | ||
bc0c38d1 SR |
365 | void ftrace(struct trace_array *tr, |
366 | struct trace_array_cpu *data, | |
367 | unsigned long ip, | |
368 | unsigned long parent_ip, | |
38697053 | 369 | unsigned long flags, int pc); |
bc0c38d1 | 370 | void tracing_sched_switch_trace(struct trace_array *tr, |
bc0c38d1 SR |
371 | struct task_struct *prev, |
372 | struct task_struct *next, | |
38697053 | 373 | unsigned long flags, int pc); |
57422797 IM |
374 | |
375 | void tracing_sched_wakeup_trace(struct trace_array *tr, | |
57422797 IM |
376 | struct task_struct *wakee, |
377 | struct task_struct *cur, | |
38697053 | 378 | unsigned long flags, int pc); |
6fb44b71 | 379 | void trace_function(struct trace_array *tr, |
6fb44b71 SR |
380 | unsigned long ip, |
381 | unsigned long parent_ip, | |
38697053 | 382 | unsigned long flags, int pc); |
0a772620 JO |
383 | void trace_graph_function(struct trace_array *tr, |
384 | unsigned long ip, | |
385 | unsigned long parent_ip, | |
386 | unsigned long flags, int pc); | |
7e9a49ef | 387 | void trace_latency_header(struct seq_file *m); |
62b915f1 JO |
388 | void trace_default_header(struct seq_file *m); |
389 | void print_trace_header(struct seq_file *m, struct trace_iterator *iter); | |
390 | int trace_empty(struct trace_iterator *iter); | |
bc0c38d1 | 391 | |
287b6e68 | 392 | void trace_graph_return(struct ftrace_graph_ret *trace); |
e49dc19c | 393 | int trace_graph_entry(struct ftrace_graph_ent *trace); |
1a0799a8 | 394 | void set_graph_array(struct trace_array *tr); |
1e9b51c2 | 395 | |
41bc8144 SR |
396 | void tracing_start_cmdline_record(void); |
397 | void tracing_stop_cmdline_record(void); | |
e168e051 SR |
398 | void tracing_sched_switch_assign_trace(struct trace_array *tr); |
399 | void tracing_stop_sched_switch_record(void); | |
400 | void tracing_start_sched_switch_record(void); | |
bc0c38d1 SR |
401 | int register_tracer(struct tracer *type); |
402 | void unregister_tracer(struct tracer *type); | |
b5130b1e | 403 | int is_tracing_stopped(void); |
955b61e5 JW |
404 | enum trace_file_type { |
405 | TRACE_FILE_LAT_FMT = 1, | |
406 | TRACE_FILE_ANNOTATE = 2, | |
407 | }; | |
408 | ||
409 | extern cpumask_var_t __read_mostly tracing_buffer_mask; | |
410 | ||
411 | #define for_each_tracing_cpu(cpu) \ | |
412 | for_each_cpu(cpu, tracing_buffer_mask) | |
bc0c38d1 SR |
413 | |
414 | extern unsigned long nsecs_to_usecs(unsigned long nsecs); | |
415 | ||
0e950173 TB |
416 | extern unsigned long tracing_thresh; |
417 | ||
5d4a9dba | 418 | #ifdef CONFIG_TRACER_MAX_TRACE |
bc0c38d1 | 419 | extern unsigned long tracing_max_latency; |
bc0c38d1 SR |
420 | |
421 | void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); | |
422 | void update_max_tr_single(struct trace_array *tr, | |
423 | struct task_struct *tsk, int cpu); | |
5d4a9dba | 424 | #endif /* CONFIG_TRACER_MAX_TRACE */ |
bc0c38d1 | 425 | |
c0a0d0d3 | 426 | #ifdef CONFIG_STACKTRACE |
e77405ad | 427 | void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
428 | int skip, int pc); |
429 | ||
1fd8df2c MH |
430 | void ftrace_trace_stack_regs(struct ring_buffer *buffer, unsigned long flags, |
431 | int skip, int pc, struct pt_regs *regs); | |
432 | ||
e77405ad | 433 | void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
434 | int pc); |
435 | ||
436 | void __trace_stack(struct trace_array *tr, unsigned long flags, int skip, | |
437 | int pc); | |
438 | #else | |
e1f7992e | 439 | static inline void ftrace_trace_stack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
440 | unsigned long flags, int skip, int pc) |
441 | { | |
442 | } | |
443 | ||
1fd8df2c MH |
444 | static inline void ftrace_trace_stack_regs(struct ring_buffer *buffer, |
445 | unsigned long flags, int skip, | |
446 | int pc, struct pt_regs *regs) | |
447 | { | |
448 | } | |
449 | ||
e1f7992e | 450 | static inline void ftrace_trace_userstack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
451 | unsigned long flags, int pc) |
452 | { | |
453 | } | |
454 | ||
455 | static inline void __trace_stack(struct trace_array *tr, unsigned long flags, | |
456 | int skip, int pc) | |
457 | { | |
458 | } | |
459 | #endif /* CONFIG_STACKTRACE */ | |
53614991 | 460 | |
e309b41d | 461 | extern cycle_t ftrace_now(int cpu); |
bc0c38d1 | 462 | |
4ca53085 | 463 | extern void trace_find_cmdline(int pid, char comm[]); |
f7d48cbd | 464 | |
bc0c38d1 SR |
465 | #ifdef CONFIG_DYNAMIC_FTRACE |
466 | extern unsigned long ftrace_update_tot_cnt; | |
d05cdb25 SR |
467 | #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func |
468 | extern int DYN_FTRACE_TEST_NAME(void); | |
95950c2e SR |
469 | #define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2 |
470 | extern int DYN_FTRACE_TEST_NAME2(void); | |
bc0c38d1 SR |
471 | #endif |
472 | ||
020e5f85 LZ |
473 | extern int ring_buffer_expanded; |
474 | extern bool tracing_selftest_disabled; | |
9288f99a | 475 | DECLARE_PER_CPU(int, ftrace_cpu_disabled); |
020e5f85 | 476 | |
60a11774 | 477 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
60a11774 SR |
478 | extern int trace_selftest_startup_function(struct tracer *trace, |
479 | struct trace_array *tr); | |
7447dce9 FW |
480 | extern int trace_selftest_startup_function_graph(struct tracer *trace, |
481 | struct trace_array *tr); | |
60a11774 SR |
482 | extern int trace_selftest_startup_irqsoff(struct tracer *trace, |
483 | struct trace_array *tr); | |
60a11774 SR |
484 | extern int trace_selftest_startup_preemptoff(struct tracer *trace, |
485 | struct trace_array *tr); | |
60a11774 SR |
486 | extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace, |
487 | struct trace_array *tr); | |
60a11774 SR |
488 | extern int trace_selftest_startup_wakeup(struct tracer *trace, |
489 | struct trace_array *tr); | |
fb1b6d8b SN |
490 | extern int trace_selftest_startup_nop(struct tracer *trace, |
491 | struct trace_array *tr); | |
60a11774 SR |
492 | extern int trace_selftest_startup_sched_switch(struct tracer *trace, |
493 | struct trace_array *tr); | |
80e5ea45 SR |
494 | extern int trace_selftest_startup_branch(struct tracer *trace, |
495 | struct trace_array *tr); | |
60a11774 SR |
496 | #endif /* CONFIG_FTRACE_STARTUP_TEST */ |
497 | ||
c7aafc54 | 498 | extern void *head_page(struct trace_array_cpu *data); |
cf8e3474 | 499 | extern unsigned long long ns2usecs(cycle_t nsec); |
1fd8f2a3 | 500 | extern int |
40ce74f1 | 501 | trace_vbprintk(unsigned long ip, const char *fmt, va_list args); |
48ead020 | 502 | extern int |
40ce74f1 | 503 | trace_vprintk(unsigned long ip, const char *fmt, va_list args); |
659372d3 SR |
504 | extern int |
505 | trace_array_vprintk(struct trace_array *tr, | |
506 | unsigned long ip, const char *fmt, va_list args); | |
507 | int trace_array_printk(struct trace_array *tr, | |
508 | unsigned long ip, const char *fmt, ...); | |
955b61e5 JW |
509 | void trace_printk_seq(struct trace_seq *s); |
510 | enum print_line_t print_trace_line(struct trace_iterator *iter); | |
c7aafc54 | 511 | |
4e655519 IM |
512 | extern unsigned long trace_flags; |
513 | ||
5079f326 Z |
514 | extern int trace_clock_id; |
515 | ||
15e6cb36 | 516 | /* Standard output formatting function used for function return traces */ |
fb52607a | 517 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
62b915f1 JO |
518 | |
519 | /* Flag options */ | |
520 | #define TRACE_GRAPH_PRINT_OVERRUN 0x1 | |
521 | #define TRACE_GRAPH_PRINT_CPU 0x2 | |
522 | #define TRACE_GRAPH_PRINT_OVERHEAD 0x4 | |
523 | #define TRACE_GRAPH_PRINT_PROC 0x8 | |
524 | #define TRACE_GRAPH_PRINT_DURATION 0x10 | |
525 | #define TRACE_GRAPH_PRINT_ABS_TIME 0x20 | |
526 | ||
d7a8d9e9 JO |
527 | extern enum print_line_t |
528 | print_graph_function_flags(struct trace_iterator *iter, u32 flags); | |
529 | extern void print_graph_headers_flags(struct seq_file *s, u32 flags); | |
0706f1c4 SR |
530 | extern enum print_line_t |
531 | trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); | |
62b915f1 JO |
532 | extern void graph_trace_open(struct trace_iterator *iter); |
533 | extern void graph_trace_close(struct trace_iterator *iter); | |
534 | extern int __trace_graph_entry(struct trace_array *tr, | |
535 | struct ftrace_graph_ent *trace, | |
536 | unsigned long flags, int pc); | |
537 | extern void __trace_graph_return(struct trace_array *tr, | |
538 | struct ftrace_graph_ret *trace, | |
539 | unsigned long flags, int pc); | |
540 | ||
ea4e2bc4 SR |
541 | |
542 | #ifdef CONFIG_DYNAMIC_FTRACE | |
543 | /* TODO: make this variable */ | |
544 | #define FTRACE_GRAPH_MAX_FUNCS 32 | |
c7c6b1fe | 545 | extern int ftrace_graph_filter_enabled; |
ea4e2bc4 SR |
546 | extern int ftrace_graph_count; |
547 | extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS]; | |
548 | ||
549 | static inline int ftrace_graph_addr(unsigned long addr) | |
550 | { | |
551 | int i; | |
552 | ||
c7c6b1fe | 553 | if (!ftrace_graph_filter_enabled) |
ea4e2bc4 SR |
554 | return 1; |
555 | ||
556 | for (i = 0; i < ftrace_graph_count; i++) { | |
e4a3f541 SR |
557 | if (addr == ftrace_graph_funcs[i]) { |
558 | /* | |
559 | * If no irqs are to be traced, but a set_graph_function | |
560 | * is set, and called by an interrupt handler, we still | |
561 | * want to trace it. | |
562 | */ | |
563 | if (in_irq()) | |
564 | trace_recursion_set(TRACE_IRQ_BIT); | |
565 | else | |
566 | trace_recursion_clear(TRACE_IRQ_BIT); | |
ea4e2bc4 | 567 | return 1; |
e4a3f541 | 568 | } |
ea4e2bc4 SR |
569 | } |
570 | ||
571 | return 0; | |
572 | } | |
15e6cb36 | 573 | #else |
6b253930 IM |
574 | static inline int ftrace_graph_addr(unsigned long addr) |
575 | { | |
576 | return 1; | |
ea4e2bc4 SR |
577 | } |
578 | #endif /* CONFIG_DYNAMIC_FTRACE */ | |
ea4e2bc4 | 579 | #else /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 580 | static inline enum print_line_t |
d7a8d9e9 | 581 | print_graph_function_flags(struct trace_iterator *iter, u32 flags) |
15e6cb36 FW |
582 | { |
583 | return TRACE_TYPE_UNHANDLED; | |
584 | } | |
ea4e2bc4 | 585 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 586 | |
756d17ee | 587 | extern struct list_head ftrace_pids; |
804a6851 | 588 | |
1155de47 | 589 | #ifdef CONFIG_FUNCTION_TRACER |
804a6851 SR |
590 | static inline int ftrace_trace_task(struct task_struct *task) |
591 | { | |
756d17ee | 592 | if (list_empty(&ftrace_pids)) |
804a6851 SR |
593 | return 1; |
594 | ||
595 | return test_tsk_trace_trace(task); | |
596 | } | |
e0a413f6 | 597 | extern int ftrace_is_dead(void); |
1155de47 PM |
598 | #else |
599 | static inline int ftrace_trace_task(struct task_struct *task) | |
600 | { | |
601 | return 1; | |
602 | } | |
e0a413f6 | 603 | static inline int ftrace_is_dead(void) { return 0; } |
1155de47 | 604 | #endif |
804a6851 | 605 | |
ced39002 JO |
606 | int ftrace_event_is_function(struct ftrace_event_call *call); |
607 | ||
b63f39ea | 608 | /* |
609 | * struct trace_parser - servers for reading the user input separated by spaces | |
610 | * @cont: set if the input is not complete - no final space char was found | |
611 | * @buffer: holds the parsed user input | |
1537a363 | 612 | * @idx: user input length |
b63f39ea | 613 | * @size: buffer size |
614 | */ | |
615 | struct trace_parser { | |
616 | bool cont; | |
617 | char *buffer; | |
618 | unsigned idx; | |
619 | unsigned size; | |
620 | }; | |
621 | ||
622 | static inline bool trace_parser_loaded(struct trace_parser *parser) | |
623 | { | |
624 | return (parser->idx != 0); | |
625 | } | |
626 | ||
627 | static inline bool trace_parser_cont(struct trace_parser *parser) | |
628 | { | |
629 | return parser->cont; | |
630 | } | |
631 | ||
632 | static inline void trace_parser_clear(struct trace_parser *parser) | |
633 | { | |
634 | parser->cont = false; | |
635 | parser->idx = 0; | |
636 | } | |
637 | ||
638 | extern int trace_parser_get_init(struct trace_parser *parser, int size); | |
639 | extern void trace_parser_put(struct trace_parser *parser); | |
640 | extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf, | |
641 | size_t cnt, loff_t *ppos); | |
642 | ||
4fcdae83 SR |
643 | /* |
644 | * trace_iterator_flags is an enumeration that defines bit | |
645 | * positions into trace_flags that controls the output. | |
646 | * | |
647 | * NOTE: These bits must match the trace_options array in | |
648 | * trace.c. | |
649 | */ | |
4e655519 IM |
650 | enum trace_iterator_flags { |
651 | TRACE_ITER_PRINT_PARENT = 0x01, | |
652 | TRACE_ITER_SYM_OFFSET = 0x02, | |
653 | TRACE_ITER_SYM_ADDR = 0x04, | |
654 | TRACE_ITER_VERBOSE = 0x08, | |
655 | TRACE_ITER_RAW = 0x10, | |
656 | TRACE_ITER_HEX = 0x20, | |
657 | TRACE_ITER_BIN = 0x40, | |
658 | TRACE_ITER_BLOCK = 0x80, | |
659 | TRACE_ITER_STACKTRACE = 0x100, | |
2cbafd68 LZ |
660 | TRACE_ITER_PRINTK = 0x200, |
661 | TRACE_ITER_PREEMPTONLY = 0x400, | |
662 | TRACE_ITER_BRANCH = 0x800, | |
663 | TRACE_ITER_ANNOTATE = 0x1000, | |
664 | TRACE_ITER_USERSTACKTRACE = 0x2000, | |
665 | TRACE_ITER_SYM_USEROBJ = 0x4000, | |
666 | TRACE_ITER_PRINTK_MSGONLY = 0x8000, | |
667 | TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */ | |
668 | TRACE_ITER_LATENCY_FMT = 0x20000, | |
669 | TRACE_ITER_SLEEP_TIME = 0x40000, | |
670 | TRACE_ITER_GRAPH_TIME = 0x80000, | |
e870e9a1 | 671 | TRACE_ITER_RECORD_CMD = 0x100000, |
750912fa | 672 | TRACE_ITER_OVERWRITE = 0x200000, |
cf30cf67 | 673 | TRACE_ITER_STOP_ON_FREE = 0x400000, |
77271ce4 | 674 | TRACE_ITER_IRQ_INFO = 0x800000, |
4e655519 IM |
675 | }; |
676 | ||
15e6cb36 FW |
677 | /* |
678 | * TRACE_ITER_SYM_MASK masks the options in trace_flags that | |
679 | * control the output of kernel symbols. | |
680 | */ | |
681 | #define TRACE_ITER_SYM_MASK \ | |
682 | (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR) | |
683 | ||
43a15386 FW |
684 | extern struct tracer nop_trace; |
685 | ||
2ed84eeb | 686 | #ifdef CONFIG_BRANCH_TRACER |
9f029e83 SR |
687 | extern int enable_branch_tracing(struct trace_array *tr); |
688 | extern void disable_branch_tracing(void); | |
689 | static inline int trace_branch_enable(struct trace_array *tr) | |
52f232cb | 690 | { |
9f029e83 SR |
691 | if (trace_flags & TRACE_ITER_BRANCH) |
692 | return enable_branch_tracing(tr); | |
52f232cb SR |
693 | return 0; |
694 | } | |
9f029e83 | 695 | static inline void trace_branch_disable(void) |
52f232cb SR |
696 | { |
697 | /* due to races, always disable */ | |
9f029e83 | 698 | disable_branch_tracing(); |
52f232cb SR |
699 | } |
700 | #else | |
9f029e83 | 701 | static inline int trace_branch_enable(struct trace_array *tr) |
52f232cb SR |
702 | { |
703 | return 0; | |
704 | } | |
9f029e83 | 705 | static inline void trace_branch_disable(void) |
52f232cb SR |
706 | { |
707 | } | |
2ed84eeb | 708 | #endif /* CONFIG_BRANCH_TRACER */ |
52f232cb | 709 | |
1852fcce SR |
710 | /* set ring buffers to default size if not already done so */ |
711 | int tracing_update_buffers(void); | |
712 | ||
fd994989 SR |
713 | /* trace event type bit fields, not numeric */ |
714 | enum { | |
715 | TRACE_EVENT_TYPE_PRINTF = 1, | |
716 | TRACE_EVENT_TYPE_RAW = 2, | |
717 | }; | |
718 | ||
cf027f64 TZ |
719 | struct ftrace_event_field { |
720 | struct list_head link; | |
721 | char *name; | |
722 | char *type; | |
aa38e9fc | 723 | int filter_type; |
cf027f64 TZ |
724 | int offset; |
725 | int size; | |
a118e4d1 | 726 | int is_signed; |
cf027f64 TZ |
727 | }; |
728 | ||
30e673b2 | 729 | struct event_filter { |
c9c53ca0 SR |
730 | int n_preds; /* Number assigned */ |
731 | int a_preds; /* allocated */ | |
74e9e58c | 732 | struct filter_pred *preds; |
61e9dea2 | 733 | struct filter_pred *root; |
8b372562 | 734 | char *filter_string; |
30e673b2 TZ |
735 | }; |
736 | ||
cfb180f3 TZ |
737 | struct event_subsystem { |
738 | struct list_head list; | |
739 | const char *name; | |
740 | struct dentry *entry; | |
1f9963cb | 741 | struct event_filter *filter; |
dc82ec98 | 742 | int nr_events; |
e9dbfae5 | 743 | int ref_count; |
cfb180f3 TZ |
744 | }; |
745 | ||
61e9dea2 SR |
746 | #define FILTER_PRED_INVALID ((unsigned short)-1) |
747 | #define FILTER_PRED_IS_RIGHT (1 << 15) | |
43cd4145 | 748 | #define FILTER_PRED_FOLD (1 << 15) |
61e9dea2 | 749 | |
bf93f9ed SR |
750 | /* |
751 | * The max preds is the size of unsigned short with | |
752 | * two flags at the MSBs. One bit is used for both the IS_RIGHT | |
753 | * and FOLD flags. The other is reserved. | |
754 | * | |
755 | * 2^14 preds is way more than enough. | |
756 | */ | |
757 | #define MAX_FILTER_PRED 16384 | |
4a3d27e9 | 758 | |
7ce7e424 | 759 | struct filter_pred; |
1889d209 | 760 | struct regex; |
7ce7e424 | 761 | |
58d9a597 | 762 | typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event); |
7ce7e424 | 763 | |
1889d209 FW |
764 | typedef int (*regex_match_func)(char *str, struct regex *r, int len); |
765 | ||
3f6fe06d | 766 | enum regex_type { |
b0f1a59a | 767 | MATCH_FULL = 0, |
3f6fe06d FW |
768 | MATCH_FRONT_ONLY, |
769 | MATCH_MIDDLE_ONLY, | |
770 | MATCH_END_ONLY, | |
771 | }; | |
772 | ||
1889d209 FW |
773 | struct regex { |
774 | char pattern[MAX_FILTER_STR_VAL]; | |
775 | int len; | |
776 | int field_len; | |
777 | regex_match_func match; | |
778 | }; | |
779 | ||
7ce7e424 | 780 | struct filter_pred { |
1889d209 FW |
781 | filter_pred_fn_t fn; |
782 | u64 val; | |
783 | struct regex regex; | |
61aaef55 | 784 | unsigned short *ops; |
1d0e78e3 | 785 | struct ftrace_event_field *field; |
1889d209 FW |
786 | int offset; |
787 | int not; | |
788 | int op; | |
61e9dea2 SR |
789 | unsigned short index; |
790 | unsigned short parent; | |
791 | unsigned short left; | |
792 | unsigned short right; | |
7ce7e424 TZ |
793 | }; |
794 | ||
8728fe50 LZ |
795 | extern struct list_head ftrace_common_fields; |
796 | ||
3f6fe06d FW |
797 | extern enum regex_type |
798 | filter_parse_regex(char *buff, int len, char **search, int *not); | |
8b372562 | 799 | extern void print_event_filter(struct ftrace_event_call *call, |
4bda2d51 | 800 | struct trace_seq *s); |
8b372562 TZ |
801 | extern int apply_event_filter(struct ftrace_event_call *call, |
802 | char *filter_string); | |
803 | extern int apply_subsystem_event_filter(struct event_subsystem *system, | |
804 | char *filter_string); | |
805 | extern void print_subsystem_event_filter(struct event_subsystem *system, | |
ac1adc55 | 806 | struct trace_seq *s); |
aa38e9fc | 807 | extern int filter_assign_type(const char *type); |
7ce7e424 | 808 | |
2e33af02 SR |
809 | struct list_head * |
810 | trace_get_fields(struct ftrace_event_call *event_call); | |
811 | ||
eb02ce01 | 812 | static inline int |
e1112b4d | 813 | filter_check_discard(struct ftrace_event_call *call, void *rec, |
eb02ce01 | 814 | struct ring_buffer *buffer, |
e1112b4d TZ |
815 | struct ring_buffer_event *event) |
816 | { | |
553552ce | 817 | if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) && |
6fb2915d | 818 | !filter_match_preds(call->filter, rec)) { |
eb02ce01 TZ |
819 | ring_buffer_discard_commit(buffer, event); |
820 | return 1; | |
821 | } | |
822 | ||
823 | return 0; | |
e1112b4d TZ |
824 | } |
825 | ||
e870e9a1 LZ |
826 | extern void trace_event_enable_cmd_record(bool enable); |
827 | ||
20c8928a | 828 | extern struct mutex event_mutex; |
a59fd602 | 829 | extern struct list_head ftrace_events; |
ac199db0 | 830 | |
e9fb2b6d SR |
831 | extern const char *__start___trace_bprintk_fmt[]; |
832 | extern const char *__stop___trace_bprintk_fmt[]; | |
833 | ||
07d777fe SR |
834 | void trace_printk_init_buffers(void); |
835 | ||
4e5292ea | 836 | #undef FTRACE_ENTRY |
02aa3162 | 837 | #define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \ |
86c38a31 JM |
838 | extern struct ftrace_event_call \ |
839 | __attribute__((__aligned__(4))) event_##call; | |
4e5292ea | 840 | #undef FTRACE_ENTRY_DUP |
02aa3162 JO |
841 | #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print, filter) \ |
842 | FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print), \ | |
843 | filter) | |
4e5292ea | 844 | #include "trace_entries.h" |
e1112b4d | 845 | |
6e48b550 | 846 | #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_FUNCTION_TRACER) |
ced39002 JO |
847 | int perf_ftrace_event_register(struct ftrace_event_call *call, |
848 | enum trace_reg type, void *data); | |
849 | #else | |
850 | #define perf_ftrace_event_register NULL | |
6e48b550 | 851 | #endif |
ced39002 | 852 | |
bc0c38d1 | 853 | #endif /* _LINUX_KERNEL_TRACE_H */ |