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Commit | Line | Data |
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bc0c38d1 SR |
1 | #ifndef _LINUX_KERNEL_TRACE_H |
2 | #define _LINUX_KERNEL_TRACE_H | |
3 | ||
4 | #include <linux/fs.h> | |
5 | #include <asm/atomic.h> | |
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 | |
b04cc6b1 FW |
281 | #define TRACE_PIPE_ALL_CPU -1 |
282 | ||
b6f11df2 | 283 | int tracer_init(struct tracer *t, struct trace_array *tr); |
9036990d | 284 | int tracing_is_enabled(void); |
45dcd8b8 | 285 | void trace_wake_up(void); |
3928a8a2 | 286 | void tracing_reset(struct trace_array *tr, int cpu); |
213cc060 | 287 | void tracing_reset_online_cpus(struct trace_array *tr); |
9456f0fa SR |
288 | void tracing_reset_current(int cpu); |
289 | void tracing_reset_current_online_cpus(void); | |
bc0c38d1 | 290 | int tracing_open_generic(struct inode *inode, struct file *filp); |
5452af66 FW |
291 | struct dentry *trace_create_file(const char *name, |
292 | mode_t mode, | |
293 | struct dentry *parent, | |
294 | void *data, | |
295 | const struct file_operations *fops); | |
296 | ||
bc0c38d1 | 297 | struct dentry *tracing_init_dentry(void); |
d618b3e6 | 298 | |
51a763dd ACM |
299 | struct ring_buffer_event; |
300 | ||
e77405ad SR |
301 | struct ring_buffer_event * |
302 | trace_buffer_lock_reserve(struct ring_buffer *buffer, | |
303 | int type, | |
304 | unsigned long len, | |
305 | unsigned long flags, | |
306 | int pc); | |
307 | void trace_buffer_unlock_commit(struct ring_buffer *buffer, | |
51a763dd ACM |
308 | struct ring_buffer_event *event, |
309 | unsigned long flags, int pc); | |
310 | ||
45dcd8b8 PP |
311 | struct trace_entry *tracing_get_trace_entry(struct trace_array *tr, |
312 | struct trace_array_cpu *data); | |
c4a8e8be FW |
313 | |
314 | struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, | |
315 | int *ent_cpu, u64 *ent_ts); | |
316 | ||
955b61e5 JW |
317 | int trace_empty(struct trace_iterator *iter); |
318 | ||
319 | void *trace_find_next_entry_inc(struct trace_iterator *iter); | |
320 | ||
321 | void trace_init_global_iter(struct trace_iterator *iter); | |
322 | ||
323 | void tracing_iter_reset(struct trace_iterator *iter, int cpu); | |
324 | ||
6eaaa5d5 FW |
325 | void default_wait_pipe(struct trace_iterator *iter); |
326 | void poll_wait_pipe(struct trace_iterator *iter); | |
327 | ||
bc0c38d1 SR |
328 | void ftrace(struct trace_array *tr, |
329 | struct trace_array_cpu *data, | |
330 | unsigned long ip, | |
331 | unsigned long parent_ip, | |
38697053 | 332 | unsigned long flags, int pc); |
bc0c38d1 | 333 | void tracing_sched_switch_trace(struct trace_array *tr, |
bc0c38d1 SR |
334 | struct task_struct *prev, |
335 | struct task_struct *next, | |
38697053 | 336 | unsigned long flags, int pc); |
57422797 IM |
337 | |
338 | void tracing_sched_wakeup_trace(struct trace_array *tr, | |
57422797 IM |
339 | struct task_struct *wakee, |
340 | struct task_struct *cur, | |
38697053 | 341 | unsigned long flags, int pc); |
6fb44b71 | 342 | void trace_function(struct trace_array *tr, |
6fb44b71 SR |
343 | unsigned long ip, |
344 | unsigned long parent_ip, | |
38697053 | 345 | unsigned long flags, int pc); |
0a772620 JO |
346 | void trace_graph_function(struct trace_array *tr, |
347 | unsigned long ip, | |
348 | unsigned long parent_ip, | |
349 | unsigned long flags, int pc); | |
62b915f1 JO |
350 | void trace_default_header(struct seq_file *m); |
351 | void print_trace_header(struct seq_file *m, struct trace_iterator *iter); | |
352 | int trace_empty(struct trace_iterator *iter); | |
bc0c38d1 | 353 | |
287b6e68 | 354 | void trace_graph_return(struct ftrace_graph_ret *trace); |
e49dc19c | 355 | int trace_graph_entry(struct ftrace_graph_ent *trace); |
1a0799a8 | 356 | void set_graph_array(struct trace_array *tr); |
1e9b51c2 | 357 | |
41bc8144 SR |
358 | void tracing_start_cmdline_record(void); |
359 | void tracing_stop_cmdline_record(void); | |
e168e051 SR |
360 | void tracing_sched_switch_assign_trace(struct trace_array *tr); |
361 | void tracing_stop_sched_switch_record(void); | |
362 | void tracing_start_sched_switch_record(void); | |
bc0c38d1 SR |
363 | int register_tracer(struct tracer *type); |
364 | void unregister_tracer(struct tracer *type); | |
b5130b1e | 365 | int is_tracing_stopped(void); |
955b61e5 JW |
366 | enum trace_file_type { |
367 | TRACE_FILE_LAT_FMT = 1, | |
368 | TRACE_FILE_ANNOTATE = 2, | |
369 | }; | |
370 | ||
371 | extern cpumask_var_t __read_mostly tracing_buffer_mask; | |
372 | ||
373 | #define for_each_tracing_cpu(cpu) \ | |
374 | for_each_cpu(cpu, tracing_buffer_mask) | |
bc0c38d1 SR |
375 | |
376 | extern unsigned long nsecs_to_usecs(unsigned long nsecs); | |
377 | ||
0e950173 TB |
378 | extern unsigned long tracing_thresh; |
379 | ||
5d4a9dba | 380 | #ifdef CONFIG_TRACER_MAX_TRACE |
bc0c38d1 | 381 | extern unsigned long tracing_max_latency; |
bc0c38d1 SR |
382 | |
383 | void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); | |
384 | void update_max_tr_single(struct trace_array *tr, | |
385 | struct task_struct *tsk, int cpu); | |
5d4a9dba | 386 | #endif /* CONFIG_TRACER_MAX_TRACE */ |
bc0c38d1 | 387 | |
c0a0d0d3 | 388 | #ifdef CONFIG_STACKTRACE |
e77405ad | 389 | void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
390 | int skip, int pc); |
391 | ||
e77405ad | 392 | void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
393 | int pc); |
394 | ||
395 | void __trace_stack(struct trace_array *tr, unsigned long flags, int skip, | |
396 | int pc); | |
397 | #else | |
e1f7992e | 398 | static inline void ftrace_trace_stack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
399 | unsigned long flags, int skip, int pc) |
400 | { | |
401 | } | |
402 | ||
e1f7992e | 403 | static inline void ftrace_trace_userstack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
404 | unsigned long flags, int pc) |
405 | { | |
406 | } | |
407 | ||
408 | static inline void __trace_stack(struct trace_array *tr, unsigned long flags, | |
409 | int skip, int pc) | |
410 | { | |
411 | } | |
412 | #endif /* CONFIG_STACKTRACE */ | |
53614991 | 413 | |
e309b41d | 414 | extern cycle_t ftrace_now(int cpu); |
bc0c38d1 | 415 | |
4ca53085 | 416 | extern void trace_find_cmdline(int pid, char comm[]); |
f7d48cbd | 417 | |
bc0c38d1 SR |
418 | #ifdef CONFIG_DYNAMIC_FTRACE |
419 | extern unsigned long ftrace_update_tot_cnt; | |
d05cdb25 SR |
420 | #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func |
421 | extern int DYN_FTRACE_TEST_NAME(void); | |
95950c2e SR |
422 | #define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2 |
423 | extern int DYN_FTRACE_TEST_NAME2(void); | |
bc0c38d1 SR |
424 | #endif |
425 | ||
020e5f85 LZ |
426 | extern int ring_buffer_expanded; |
427 | extern bool tracing_selftest_disabled; | |
9288f99a | 428 | DECLARE_PER_CPU(int, ftrace_cpu_disabled); |
020e5f85 | 429 | |
60a11774 | 430 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
60a11774 SR |
431 | extern int trace_selftest_startup_function(struct tracer *trace, |
432 | struct trace_array *tr); | |
7447dce9 FW |
433 | extern int trace_selftest_startup_function_graph(struct tracer *trace, |
434 | struct trace_array *tr); | |
60a11774 SR |
435 | extern int trace_selftest_startup_irqsoff(struct tracer *trace, |
436 | struct trace_array *tr); | |
60a11774 SR |
437 | extern int trace_selftest_startup_preemptoff(struct tracer *trace, |
438 | struct trace_array *tr); | |
60a11774 SR |
439 | extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace, |
440 | struct trace_array *tr); | |
60a11774 SR |
441 | extern int trace_selftest_startup_wakeup(struct tracer *trace, |
442 | struct trace_array *tr); | |
fb1b6d8b SN |
443 | extern int trace_selftest_startup_nop(struct tracer *trace, |
444 | struct trace_array *tr); | |
60a11774 SR |
445 | extern int trace_selftest_startup_sched_switch(struct tracer *trace, |
446 | struct trace_array *tr); | |
80e5ea45 SR |
447 | extern int trace_selftest_startup_branch(struct tracer *trace, |
448 | struct trace_array *tr); | |
60a11774 SR |
449 | #endif /* CONFIG_FTRACE_STARTUP_TEST */ |
450 | ||
c7aafc54 | 451 | extern void *head_page(struct trace_array_cpu *data); |
cf8e3474 | 452 | extern unsigned long long ns2usecs(cycle_t nsec); |
1fd8f2a3 | 453 | extern int |
40ce74f1 | 454 | trace_vbprintk(unsigned long ip, const char *fmt, va_list args); |
48ead020 | 455 | extern int |
40ce74f1 | 456 | trace_vprintk(unsigned long ip, const char *fmt, va_list args); |
659372d3 SR |
457 | extern int |
458 | trace_array_vprintk(struct trace_array *tr, | |
459 | unsigned long ip, const char *fmt, va_list args); | |
460 | int trace_array_printk(struct trace_array *tr, | |
461 | unsigned long ip, const char *fmt, ...); | |
955b61e5 JW |
462 | void trace_printk_seq(struct trace_seq *s); |
463 | enum print_line_t print_trace_line(struct trace_iterator *iter); | |
c7aafc54 | 464 | |
4e655519 IM |
465 | extern unsigned long trace_flags; |
466 | ||
5079f326 Z |
467 | extern int trace_clock_id; |
468 | ||
15e6cb36 | 469 | /* Standard output formatting function used for function return traces */ |
fb52607a | 470 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
62b915f1 JO |
471 | |
472 | /* Flag options */ | |
473 | #define TRACE_GRAPH_PRINT_OVERRUN 0x1 | |
474 | #define TRACE_GRAPH_PRINT_CPU 0x2 | |
475 | #define TRACE_GRAPH_PRINT_OVERHEAD 0x4 | |
476 | #define TRACE_GRAPH_PRINT_PROC 0x8 | |
477 | #define TRACE_GRAPH_PRINT_DURATION 0x10 | |
478 | #define TRACE_GRAPH_PRINT_ABS_TIME 0x20 | |
479 | ||
d7a8d9e9 JO |
480 | extern enum print_line_t |
481 | print_graph_function_flags(struct trace_iterator *iter, u32 flags); | |
482 | extern void print_graph_headers_flags(struct seq_file *s, u32 flags); | |
0706f1c4 SR |
483 | extern enum print_line_t |
484 | trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); | |
62b915f1 JO |
485 | extern void graph_trace_open(struct trace_iterator *iter); |
486 | extern void graph_trace_close(struct trace_iterator *iter); | |
487 | extern int __trace_graph_entry(struct trace_array *tr, | |
488 | struct ftrace_graph_ent *trace, | |
489 | unsigned long flags, int pc); | |
490 | extern void __trace_graph_return(struct trace_array *tr, | |
491 | struct ftrace_graph_ret *trace, | |
492 | unsigned long flags, int pc); | |
493 | ||
ea4e2bc4 SR |
494 | |
495 | #ifdef CONFIG_DYNAMIC_FTRACE | |
496 | /* TODO: make this variable */ | |
497 | #define FTRACE_GRAPH_MAX_FUNCS 32 | |
c7c6b1fe | 498 | extern int ftrace_graph_filter_enabled; |
ea4e2bc4 SR |
499 | extern int ftrace_graph_count; |
500 | extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS]; | |
501 | ||
502 | static inline int ftrace_graph_addr(unsigned long addr) | |
503 | { | |
504 | int i; | |
505 | ||
c7c6b1fe | 506 | if (!ftrace_graph_filter_enabled) |
ea4e2bc4 SR |
507 | return 1; |
508 | ||
509 | for (i = 0; i < ftrace_graph_count; i++) { | |
510 | if (addr == ftrace_graph_funcs[i]) | |
511 | return 1; | |
512 | } | |
513 | ||
514 | return 0; | |
515 | } | |
15e6cb36 | 516 | #else |
6b253930 IM |
517 | static inline int ftrace_graph_addr(unsigned long addr) |
518 | { | |
519 | return 1; | |
ea4e2bc4 SR |
520 | } |
521 | #endif /* CONFIG_DYNAMIC_FTRACE */ | |
ea4e2bc4 | 522 | #else /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 523 | static inline enum print_line_t |
d7a8d9e9 | 524 | print_graph_function_flags(struct trace_iterator *iter, u32 flags) |
15e6cb36 FW |
525 | { |
526 | return TRACE_TYPE_UNHANDLED; | |
527 | } | |
ea4e2bc4 | 528 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 529 | |
756d17ee | 530 | extern struct list_head ftrace_pids; |
804a6851 | 531 | |
1155de47 | 532 | #ifdef CONFIG_FUNCTION_TRACER |
804a6851 SR |
533 | static inline int ftrace_trace_task(struct task_struct *task) |
534 | { | |
756d17ee | 535 | if (list_empty(&ftrace_pids)) |
804a6851 SR |
536 | return 1; |
537 | ||
538 | return test_tsk_trace_trace(task); | |
539 | } | |
1155de47 PM |
540 | #else |
541 | static inline int ftrace_trace_task(struct task_struct *task) | |
542 | { | |
543 | return 1; | |
544 | } | |
545 | #endif | |
804a6851 | 546 | |
b63f39ea | 547 | /* |
548 | * struct trace_parser - servers for reading the user input separated by spaces | |
549 | * @cont: set if the input is not complete - no final space char was found | |
550 | * @buffer: holds the parsed user input | |
1537a363 | 551 | * @idx: user input length |
b63f39ea | 552 | * @size: buffer size |
553 | */ | |
554 | struct trace_parser { | |
555 | bool cont; | |
556 | char *buffer; | |
557 | unsigned idx; | |
558 | unsigned size; | |
559 | }; | |
560 | ||
561 | static inline bool trace_parser_loaded(struct trace_parser *parser) | |
562 | { | |
563 | return (parser->idx != 0); | |
564 | } | |
565 | ||
566 | static inline bool trace_parser_cont(struct trace_parser *parser) | |
567 | { | |
568 | return parser->cont; | |
569 | } | |
570 | ||
571 | static inline void trace_parser_clear(struct trace_parser *parser) | |
572 | { | |
573 | parser->cont = false; | |
574 | parser->idx = 0; | |
575 | } | |
576 | ||
577 | extern int trace_parser_get_init(struct trace_parser *parser, int size); | |
578 | extern void trace_parser_put(struct trace_parser *parser); | |
579 | extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf, | |
580 | size_t cnt, loff_t *ppos); | |
581 | ||
4fcdae83 SR |
582 | /* |
583 | * trace_iterator_flags is an enumeration that defines bit | |
584 | * positions into trace_flags that controls the output. | |
585 | * | |
586 | * NOTE: These bits must match the trace_options array in | |
587 | * trace.c. | |
588 | */ | |
4e655519 IM |
589 | enum trace_iterator_flags { |
590 | TRACE_ITER_PRINT_PARENT = 0x01, | |
591 | TRACE_ITER_SYM_OFFSET = 0x02, | |
592 | TRACE_ITER_SYM_ADDR = 0x04, | |
593 | TRACE_ITER_VERBOSE = 0x08, | |
594 | TRACE_ITER_RAW = 0x10, | |
595 | TRACE_ITER_HEX = 0x20, | |
596 | TRACE_ITER_BIN = 0x40, | |
597 | TRACE_ITER_BLOCK = 0x80, | |
598 | TRACE_ITER_STACKTRACE = 0x100, | |
2cbafd68 LZ |
599 | TRACE_ITER_PRINTK = 0x200, |
600 | TRACE_ITER_PREEMPTONLY = 0x400, | |
601 | TRACE_ITER_BRANCH = 0x800, | |
602 | TRACE_ITER_ANNOTATE = 0x1000, | |
603 | TRACE_ITER_USERSTACKTRACE = 0x2000, | |
604 | TRACE_ITER_SYM_USEROBJ = 0x4000, | |
605 | TRACE_ITER_PRINTK_MSGONLY = 0x8000, | |
606 | TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */ | |
607 | TRACE_ITER_LATENCY_FMT = 0x20000, | |
608 | TRACE_ITER_SLEEP_TIME = 0x40000, | |
609 | TRACE_ITER_GRAPH_TIME = 0x80000, | |
e870e9a1 | 610 | TRACE_ITER_RECORD_CMD = 0x100000, |
750912fa | 611 | TRACE_ITER_OVERWRITE = 0x200000, |
4e655519 IM |
612 | }; |
613 | ||
15e6cb36 FW |
614 | /* |
615 | * TRACE_ITER_SYM_MASK masks the options in trace_flags that | |
616 | * control the output of kernel symbols. | |
617 | */ | |
618 | #define TRACE_ITER_SYM_MASK \ | |
619 | (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR) | |
620 | ||
43a15386 FW |
621 | extern struct tracer nop_trace; |
622 | ||
2ed84eeb | 623 | #ifdef CONFIG_BRANCH_TRACER |
9f029e83 SR |
624 | extern int enable_branch_tracing(struct trace_array *tr); |
625 | extern void disable_branch_tracing(void); | |
626 | static inline int trace_branch_enable(struct trace_array *tr) | |
52f232cb | 627 | { |
9f029e83 SR |
628 | if (trace_flags & TRACE_ITER_BRANCH) |
629 | return enable_branch_tracing(tr); | |
52f232cb SR |
630 | return 0; |
631 | } | |
9f029e83 | 632 | static inline void trace_branch_disable(void) |
52f232cb SR |
633 | { |
634 | /* due to races, always disable */ | |
9f029e83 | 635 | disable_branch_tracing(); |
52f232cb SR |
636 | } |
637 | #else | |
9f029e83 | 638 | static inline int trace_branch_enable(struct trace_array *tr) |
52f232cb SR |
639 | { |
640 | return 0; | |
641 | } | |
9f029e83 | 642 | static inline void trace_branch_disable(void) |
52f232cb SR |
643 | { |
644 | } | |
2ed84eeb | 645 | #endif /* CONFIG_BRANCH_TRACER */ |
52f232cb | 646 | |
1852fcce SR |
647 | /* set ring buffers to default size if not already done so */ |
648 | int tracing_update_buffers(void); | |
649 | ||
fd994989 SR |
650 | /* trace event type bit fields, not numeric */ |
651 | enum { | |
652 | TRACE_EVENT_TYPE_PRINTF = 1, | |
653 | TRACE_EVENT_TYPE_RAW = 2, | |
654 | }; | |
655 | ||
cf027f64 TZ |
656 | struct ftrace_event_field { |
657 | struct list_head link; | |
658 | char *name; | |
659 | char *type; | |
aa38e9fc | 660 | int filter_type; |
cf027f64 TZ |
661 | int offset; |
662 | int size; | |
a118e4d1 | 663 | int is_signed; |
cf027f64 TZ |
664 | }; |
665 | ||
30e673b2 | 666 | struct event_filter { |
c9c53ca0 SR |
667 | int n_preds; /* Number assigned */ |
668 | int a_preds; /* allocated */ | |
74e9e58c | 669 | struct filter_pred *preds; |
61e9dea2 | 670 | struct filter_pred *root; |
8b372562 | 671 | char *filter_string; |
30e673b2 TZ |
672 | }; |
673 | ||
cfb180f3 TZ |
674 | struct event_subsystem { |
675 | struct list_head list; | |
676 | const char *name; | |
677 | struct dentry *entry; | |
1f9963cb | 678 | struct event_filter *filter; |
dc82ec98 | 679 | int nr_events; |
cfb180f3 TZ |
680 | }; |
681 | ||
61e9dea2 SR |
682 | #define FILTER_PRED_INVALID ((unsigned short)-1) |
683 | #define FILTER_PRED_IS_RIGHT (1 << 15) | |
43cd4145 | 684 | #define FILTER_PRED_FOLD (1 << 15) |
61e9dea2 | 685 | |
bf93f9ed SR |
686 | /* |
687 | * The max preds is the size of unsigned short with | |
688 | * two flags at the MSBs. One bit is used for both the IS_RIGHT | |
689 | * and FOLD flags. The other is reserved. | |
690 | * | |
691 | * 2^14 preds is way more than enough. | |
692 | */ | |
693 | #define MAX_FILTER_PRED 16384 | |
4a3d27e9 | 694 | |
7ce7e424 | 695 | struct filter_pred; |
1889d209 | 696 | struct regex; |
7ce7e424 | 697 | |
58d9a597 | 698 | typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event); |
7ce7e424 | 699 | |
1889d209 FW |
700 | typedef int (*regex_match_func)(char *str, struct regex *r, int len); |
701 | ||
3f6fe06d | 702 | enum regex_type { |
b0f1a59a | 703 | MATCH_FULL = 0, |
3f6fe06d FW |
704 | MATCH_FRONT_ONLY, |
705 | MATCH_MIDDLE_ONLY, | |
706 | MATCH_END_ONLY, | |
707 | }; | |
708 | ||
1889d209 FW |
709 | struct regex { |
710 | char pattern[MAX_FILTER_STR_VAL]; | |
711 | int len; | |
712 | int field_len; | |
713 | regex_match_func match; | |
714 | }; | |
715 | ||
7ce7e424 | 716 | struct filter_pred { |
1889d209 FW |
717 | filter_pred_fn_t fn; |
718 | u64 val; | |
719 | struct regex regex; | |
43cd4145 SR |
720 | /* |
721 | * Leaf nodes use field_name, ops is used by AND and OR | |
722 | * nodes. The field_name is always freed when freeing a pred. | |
723 | * We can overload field_name for ops and have it freed | |
724 | * as well. | |
725 | */ | |
726 | union { | |
727 | char *field_name; | |
728 | unsigned short *ops; | |
729 | }; | |
1889d209 FW |
730 | int offset; |
731 | int not; | |
732 | int op; | |
61e9dea2 SR |
733 | unsigned short index; |
734 | unsigned short parent; | |
735 | unsigned short left; | |
736 | unsigned short right; | |
7ce7e424 TZ |
737 | }; |
738 | ||
8728fe50 LZ |
739 | extern struct list_head ftrace_common_fields; |
740 | ||
3f6fe06d FW |
741 | extern enum regex_type |
742 | filter_parse_regex(char *buff, int len, char **search, int *not); | |
8b372562 | 743 | extern void print_event_filter(struct ftrace_event_call *call, |
4bda2d51 | 744 | struct trace_seq *s); |
8b372562 TZ |
745 | extern int apply_event_filter(struct ftrace_event_call *call, |
746 | char *filter_string); | |
747 | extern int apply_subsystem_event_filter(struct event_subsystem *system, | |
748 | char *filter_string); | |
749 | extern void print_subsystem_event_filter(struct event_subsystem *system, | |
ac1adc55 | 750 | struct trace_seq *s); |
aa38e9fc | 751 | extern int filter_assign_type(const char *type); |
7ce7e424 | 752 | |
2e33af02 SR |
753 | struct list_head * |
754 | trace_get_fields(struct ftrace_event_call *event_call); | |
755 | ||
eb02ce01 | 756 | static inline int |
e1112b4d | 757 | filter_check_discard(struct ftrace_event_call *call, void *rec, |
eb02ce01 | 758 | struct ring_buffer *buffer, |
e1112b4d TZ |
759 | struct ring_buffer_event *event) |
760 | { | |
553552ce | 761 | if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) && |
6fb2915d | 762 | !filter_match_preds(call->filter, rec)) { |
eb02ce01 TZ |
763 | ring_buffer_discard_commit(buffer, event); |
764 | return 1; | |
765 | } | |
766 | ||
767 | return 0; | |
e1112b4d TZ |
768 | } |
769 | ||
e870e9a1 LZ |
770 | extern void trace_event_enable_cmd_record(bool enable); |
771 | ||
20c8928a | 772 | extern struct mutex event_mutex; |
a59fd602 | 773 | extern struct list_head ftrace_events; |
ac199db0 | 774 | |
e9fb2b6d SR |
775 | extern const char *__start___trace_bprintk_fmt[]; |
776 | extern const char *__stop___trace_bprintk_fmt[]; | |
777 | ||
4e5292ea SR |
778 | #undef FTRACE_ENTRY |
779 | #define FTRACE_ENTRY(call, struct_name, id, tstruct, print) \ | |
86c38a31 JM |
780 | extern struct ftrace_event_call \ |
781 | __attribute__((__aligned__(4))) event_##call; | |
4e5292ea SR |
782 | #undef FTRACE_ENTRY_DUP |
783 | #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print) \ | |
784 | FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print)) | |
785 | #include "trace_entries.h" | |
e1112b4d | 786 | |
b1cff0ad SR |
787 | /* Only current can touch trace_recursion */ |
788 | #define trace_recursion_inc() do { (current)->trace_recursion++; } while (0) | |
789 | #define trace_recursion_dec() do { (current)->trace_recursion--; } while (0) | |
790 | ||
791 | /* Ring buffer has the 10 LSB bits to count */ | |
792 | #define trace_recursion_buffer() ((current)->trace_recursion & 0x3ff) | |
793 | ||
794 | /* for function tracing recursion */ | |
795 | #define TRACE_INTERNAL_BIT (1<<11) | |
796 | #define TRACE_GLOBAL_BIT (1<<12) | |
797 | ||
798 | #define trace_recursion_set(bit) do { (current)->trace_recursion |= (bit); } while (0) | |
799 | #define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(bit); } while (0) | |
800 | #define trace_recursion_test(bit) ((current)->trace_recursion & (bit)) | |
801 | ||
bc0c38d1 | 802 | #endif /* _LINUX_KERNEL_TRACE_H */ |