Commit | Line | Data |
---|---|---|
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, |
72829bc3 | 25 | TRACE_SPECIAL, |
bd8ac686 PP |
26 | TRACE_MMIO_RW, |
27 | TRACE_MMIO_MAP, | |
9f029e83 | 28 | TRACE_BRANCH, |
287b6e68 FW |
29 | TRACE_GRAPH_RET, |
30 | TRACE_GRAPH_ENT, | |
02b67518 | 31 | TRACE_USER_STACK, |
c71a8961 | 32 | TRACE_BLK, |
72829bc3 | 33 | |
f0868d1e | 34 | __TRACE_LAST_TYPE, |
72829bc3 TG |
35 | }; |
36 | ||
bc0c38d1 | 37 | |
0a1c49db SR |
38 | #undef __field |
39 | #define __field(type, item) type item; | |
86387f7e | 40 | |
d7315094 SR |
41 | #undef __field_struct |
42 | #define __field_struct(type, item) __field(type, item) | |
86387f7e | 43 | |
d7315094 SR |
44 | #undef __field_desc |
45 | #define __field_desc(type, container, item) | |
02b67518 | 46 | |
0a1c49db SR |
47 | #undef __array |
48 | #define __array(type, item, size) type item[size]; | |
1427cdf0 | 49 | |
d7315094 SR |
50 | #undef __array_desc |
51 | #define __array_desc(type, container, item, size) | |
777e208d | 52 | |
0a1c49db SR |
53 | #undef __dynamic_array |
54 | #define __dynamic_array(type, item) type item[]; | |
777e208d | 55 | |
0a1c49db SR |
56 | #undef F_STRUCT |
57 | #define F_STRUCT(args...) args | |
74239072 | 58 | |
0a1c49db SR |
59 | #undef FTRACE_ENTRY |
60 | #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ | |
61 | struct struct_name { \ | |
62 | struct trace_entry ent; \ | |
63 | tstruct \ | |
64 | } | |
777e208d | 65 | |
0a1c49db SR |
66 | #undef TP_ARGS |
67 | #define TP_ARGS(args...) args | |
52f232cb | 68 | |
0a1c49db SR |
69 | #undef FTRACE_ENTRY_DUP |
70 | #define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk) | |
1e9b51c2 | 71 | |
0a1c49db | 72 | #include "trace_entries.h" |
36994e58 | 73 | |
0a1c49db SR |
74 | /* |
75 | * syscalls are special, and need special handling, this is why | |
76 | * they are not included in trace_entries.h | |
77 | */ | |
bed1ffca FW |
78 | struct syscall_trace_enter { |
79 | struct trace_entry ent; | |
80 | int nr; | |
81 | unsigned long args[]; | |
82 | }; | |
83 | ||
84 | struct syscall_trace_exit { | |
85 | struct trace_entry ent; | |
86 | int nr; | |
99df5a6a | 87 | long ret; |
bed1ffca FW |
88 | }; |
89 | ||
93ccae7a | 90 | struct kprobe_trace_entry_head { |
413d37d1 MH |
91 | struct trace_entry ent; |
92 | unsigned long ip; | |
413d37d1 MH |
93 | }; |
94 | ||
93ccae7a | 95 | struct kretprobe_trace_entry_head { |
413d37d1 MH |
96 | struct trace_entry ent; |
97 | unsigned long func; | |
98 | unsigned long ret_ip; | |
413d37d1 MH |
99 | }; |
100 | ||
fc5e27ae PP |
101 | /* |
102 | * trace_flag_type is an enumeration that holds different | |
103 | * states when a trace occurs. These are: | |
9244489a | 104 | * IRQS_OFF - interrupts were disabled |
9de36825 | 105 | * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags |
bd9cfca9 | 106 | * NEED_RESCHED - reschedule is requested |
9244489a SR |
107 | * HARDIRQ - inside an interrupt handler |
108 | * SOFTIRQ - inside a softirq handler | |
fc5e27ae PP |
109 | */ |
110 | enum trace_flag_type { | |
111 | TRACE_FLAG_IRQS_OFF = 0x01, | |
9244489a SR |
112 | TRACE_FLAG_IRQS_NOSUPPORT = 0x02, |
113 | TRACE_FLAG_NEED_RESCHED = 0x04, | |
114 | TRACE_FLAG_HARDIRQ = 0x08, | |
115 | TRACE_FLAG_SOFTIRQ = 0x10, | |
fc5e27ae PP |
116 | }; |
117 | ||
5bf9a1ee | 118 | #define TRACE_BUF_SIZE 1024 |
bc0c38d1 SR |
119 | |
120 | /* | |
121 | * The CPU trace array - it consists of thousands of trace entries | |
122 | * plus some other descriptor data: (for example which task started | |
123 | * the trace, etc.) | |
124 | */ | |
125 | struct trace_array_cpu { | |
bc0c38d1 | 126 | atomic_t disabled; |
2cadf913 | 127 | void *buffer_page; /* ring buffer spare */ |
4e3c3333 | 128 | |
bc0c38d1 SR |
129 | unsigned long saved_latency; |
130 | unsigned long critical_start; | |
131 | unsigned long critical_end; | |
132 | unsigned long critical_sequence; | |
133 | unsigned long nice; | |
134 | unsigned long policy; | |
135 | unsigned long rt_priority; | |
2f26ebd5 | 136 | unsigned long skipped_entries; |
bc0c38d1 SR |
137 | cycle_t preempt_timestamp; |
138 | pid_t pid; | |
139 | uid_t uid; | |
140 | char comm[TASK_COMM_LEN]; | |
141 | }; | |
142 | ||
bc0c38d1 SR |
143 | /* |
144 | * The trace array - an array of per-CPU trace arrays. This is the | |
145 | * highest level data structure that individual tracers deal with. | |
146 | * They have on/off state as well: | |
147 | */ | |
148 | struct trace_array { | |
3928a8a2 | 149 | struct ring_buffer *buffer; |
bc0c38d1 | 150 | unsigned long entries; |
bc0c38d1 SR |
151 | int cpu; |
152 | cycle_t time_start; | |
b3806b43 | 153 | struct task_struct *waiter; |
bc0c38d1 SR |
154 | struct trace_array_cpu *data[NR_CPUS]; |
155 | }; | |
156 | ||
7104f300 SR |
157 | #define FTRACE_CMP_TYPE(var, type) \ |
158 | __builtin_types_compatible_p(typeof(var), type *) | |
159 | ||
160 | #undef IF_ASSIGN | |
161 | #define IF_ASSIGN(var, entry, etype, id) \ | |
162 | if (FTRACE_CMP_TYPE(var, etype)) { \ | |
163 | var = (typeof(var))(entry); \ | |
164 | WARN_ON(id && (entry)->type != id); \ | |
165 | break; \ | |
166 | } | |
167 | ||
168 | /* Will cause compile errors if type is not found. */ | |
169 | extern void __ftrace_bad_type(void); | |
170 | ||
171 | /* | |
172 | * The trace_assign_type is a verifier that the entry type is | |
173 | * the same as the type being assigned. To add new types simply | |
174 | * add a line with the following format: | |
175 | * | |
176 | * IF_ASSIGN(var, ent, type, id); | |
177 | * | |
178 | * Where "type" is the trace type that includes the trace_entry | |
179 | * as the "ent" item. And "id" is the trace identifier that is | |
180 | * used in the trace_type enum. | |
181 | * | |
182 | * If the type can have more than one id, then use zero. | |
183 | */ | |
184 | #define trace_assign_type(var, ent) \ | |
185 | do { \ | |
186 | IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \ | |
187 | IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \ | |
7104f300 | 188 | IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \ |
02b67518 | 189 | IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\ |
7104f300 | 190 | IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \ |
48ead020 | 191 | IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \ |
7104f300 SR |
192 | IF_ASSIGN(var, ent, struct special_entry, 0); \ |
193 | IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \ | |
194 | TRACE_MMIO_RW); \ | |
195 | IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \ | |
196 | TRACE_MMIO_MAP); \ | |
9f029e83 | 197 | IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \ |
287b6e68 FW |
198 | IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \ |
199 | TRACE_GRAPH_ENT); \ | |
200 | IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \ | |
201 | TRACE_GRAPH_RET); \ | |
7104f300 SR |
202 | __ftrace_bad_type(); \ |
203 | } while (0) | |
2c4f035f | 204 | |
adf9f195 FW |
205 | /* |
206 | * An option specific to a tracer. This is a boolean value. | |
207 | * The bit is the bit index that sets its value on the | |
208 | * flags value in struct tracer_flags. | |
209 | */ | |
210 | struct tracer_opt { | |
9de36825 IM |
211 | const char *name; /* Will appear on the trace_options file */ |
212 | u32 bit; /* Mask assigned in val field in tracer_flags */ | |
adf9f195 FW |
213 | }; |
214 | ||
215 | /* | |
216 | * The set of specific options for a tracer. Your tracer | |
217 | * have to set the initial value of the flags val. | |
218 | */ | |
219 | struct tracer_flags { | |
220 | u32 val; | |
9de36825 | 221 | struct tracer_opt *opts; |
adf9f195 FW |
222 | }; |
223 | ||
224 | /* Makes more easy to define a tracer opt */ | |
225 | #define TRACER_OPT(s, b) .name = #s, .bit = b | |
226 | ||
034939b6 | 227 | |
6eaaa5d5 FW |
228 | /** |
229 | * struct tracer - a specific tracer and its callbacks to interact with debugfs | |
230 | * @name: the name chosen to select it on the available_tracers file | |
231 | * @init: called when one switches to this tracer (echo name > current_tracer) | |
232 | * @reset: called when one switches to another tracer | |
233 | * @start: called when tracing is unpaused (echo 1 > tracing_enabled) | |
234 | * @stop: called when tracing is paused (echo 0 > tracing_enabled) | |
235 | * @open: called when the trace file is opened | |
236 | * @pipe_open: called when the trace_pipe file is opened | |
237 | * @wait_pipe: override how the user waits for traces on trace_pipe | |
238 | * @close: called when the trace file is released | |
c521efd1 | 239 | * @pipe_close: called when the trace_pipe file is released |
6eaaa5d5 FW |
240 | * @read: override the default read callback on trace_pipe |
241 | * @splice_read: override the default splice_read callback on trace_pipe | |
242 | * @selftest: selftest to run on boot (see trace_selftest.c) | |
243 | * @print_headers: override the first lines that describe your columns | |
244 | * @print_line: callback that prints a trace | |
245 | * @set_flag: signals one of your private flags changed (trace_options file) | |
246 | * @flags: your private flags | |
bc0c38d1 SR |
247 | */ |
248 | struct tracer { | |
249 | const char *name; | |
1c80025a | 250 | int (*init)(struct trace_array *tr); |
bc0c38d1 | 251 | void (*reset)(struct trace_array *tr); |
9036990d SR |
252 | void (*start)(struct trace_array *tr); |
253 | void (*stop)(struct trace_array *tr); | |
bc0c38d1 | 254 | void (*open)(struct trace_iterator *iter); |
107bad8b | 255 | void (*pipe_open)(struct trace_iterator *iter); |
6eaaa5d5 | 256 | void (*wait_pipe)(struct trace_iterator *iter); |
bc0c38d1 | 257 | void (*close)(struct trace_iterator *iter); |
c521efd1 | 258 | void (*pipe_close)(struct trace_iterator *iter); |
107bad8b SR |
259 | ssize_t (*read)(struct trace_iterator *iter, |
260 | struct file *filp, char __user *ubuf, | |
261 | size_t cnt, loff_t *ppos); | |
3c56819b EGM |
262 | ssize_t (*splice_read)(struct trace_iterator *iter, |
263 | struct file *filp, | |
264 | loff_t *ppos, | |
265 | struct pipe_inode_info *pipe, | |
266 | size_t len, | |
267 | unsigned int flags); | |
60a11774 SR |
268 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
269 | int (*selftest)(struct tracer *trace, | |
270 | struct trace_array *tr); | |
271 | #endif | |
8bba1bf5 | 272 | void (*print_header)(struct seq_file *m); |
2c4f035f | 273 | enum print_line_t (*print_line)(struct trace_iterator *iter); |
adf9f195 FW |
274 | /* If you handled the flag setting, return 0 */ |
275 | int (*set_flag)(u32 old_flags, u32 bit, int set); | |
bc0c38d1 SR |
276 | struct tracer *next; |
277 | int print_max; | |
9de36825 | 278 | struct tracer_flags *flags; |
bc0c38d1 SR |
279 | }; |
280 | ||
f9520750 | 281 | |
b04cc6b1 FW |
282 | #define TRACE_PIPE_ALL_CPU -1 |
283 | ||
b6f11df2 | 284 | int tracer_init(struct tracer *t, struct trace_array *tr); |
9036990d | 285 | int tracing_is_enabled(void); |
45dcd8b8 | 286 | void trace_wake_up(void); |
3928a8a2 | 287 | void tracing_reset(struct trace_array *tr, int cpu); |
213cc060 | 288 | void tracing_reset_online_cpus(struct trace_array *tr); |
9456f0fa SR |
289 | void tracing_reset_current(int cpu); |
290 | void tracing_reset_current_online_cpus(void); | |
bc0c38d1 | 291 | int tracing_open_generic(struct inode *inode, struct file *filp); |
5452af66 FW |
292 | struct dentry *trace_create_file(const char *name, |
293 | mode_t mode, | |
294 | struct dentry *parent, | |
295 | void *data, | |
296 | const struct file_operations *fops); | |
297 | ||
bc0c38d1 | 298 | struct dentry *tracing_init_dentry(void); |
d618b3e6 IM |
299 | void init_tracer_sysprof_debugfs(struct dentry *d_tracer); |
300 | ||
51a763dd ACM |
301 | struct ring_buffer_event; |
302 | ||
e77405ad SR |
303 | struct ring_buffer_event * |
304 | trace_buffer_lock_reserve(struct ring_buffer *buffer, | |
305 | int type, | |
306 | unsigned long len, | |
307 | unsigned long flags, | |
308 | int pc); | |
309 | void trace_buffer_unlock_commit(struct ring_buffer *buffer, | |
51a763dd ACM |
310 | struct ring_buffer_event *event, |
311 | unsigned long flags, int pc); | |
312 | ||
45dcd8b8 PP |
313 | struct trace_entry *tracing_get_trace_entry(struct trace_array *tr, |
314 | struct trace_array_cpu *data); | |
c4a8e8be FW |
315 | |
316 | struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, | |
317 | int *ent_cpu, u64 *ent_ts); | |
318 | ||
6eaaa5d5 FW |
319 | void default_wait_pipe(struct trace_iterator *iter); |
320 | void poll_wait_pipe(struct trace_iterator *iter); | |
321 | ||
bc0c38d1 SR |
322 | void ftrace(struct trace_array *tr, |
323 | struct trace_array_cpu *data, | |
324 | unsigned long ip, | |
325 | unsigned long parent_ip, | |
38697053 | 326 | unsigned long flags, int pc); |
bc0c38d1 | 327 | void tracing_sched_switch_trace(struct trace_array *tr, |
bc0c38d1 SR |
328 | struct task_struct *prev, |
329 | struct task_struct *next, | |
38697053 | 330 | unsigned long flags, int pc); |
57422797 IM |
331 | |
332 | void tracing_sched_wakeup_trace(struct trace_array *tr, | |
57422797 IM |
333 | struct task_struct *wakee, |
334 | struct task_struct *cur, | |
38697053 | 335 | unsigned long flags, int pc); |
f0a920d5 IM |
336 | void trace_special(struct trace_array *tr, |
337 | struct trace_array_cpu *data, | |
338 | unsigned long arg1, | |
339 | unsigned long arg2, | |
38697053 | 340 | unsigned long arg3, int pc); |
6fb44b71 | 341 | void trace_function(struct trace_array *tr, |
6fb44b71 SR |
342 | unsigned long ip, |
343 | unsigned long parent_ip, | |
38697053 | 344 | unsigned long flags, int pc); |
62b915f1 JO |
345 | void trace_default_header(struct seq_file *m); |
346 | void print_trace_header(struct seq_file *m, struct trace_iterator *iter); | |
347 | int trace_empty(struct trace_iterator *iter); | |
bc0c38d1 | 348 | |
287b6e68 | 349 | void trace_graph_return(struct ftrace_graph_ret *trace); |
e49dc19c | 350 | int trace_graph_entry(struct ftrace_graph_ent *trace); |
1a0799a8 | 351 | void set_graph_array(struct trace_array *tr); |
1e9b51c2 | 352 | |
41bc8144 SR |
353 | void tracing_start_cmdline_record(void); |
354 | void tracing_stop_cmdline_record(void); | |
e168e051 SR |
355 | void tracing_sched_switch_assign_trace(struct trace_array *tr); |
356 | void tracing_stop_sched_switch_record(void); | |
357 | void tracing_start_sched_switch_record(void); | |
bc0c38d1 SR |
358 | int register_tracer(struct tracer *type); |
359 | void unregister_tracer(struct tracer *type); | |
b5130b1e | 360 | int is_tracing_stopped(void); |
bc0c38d1 SR |
361 | |
362 | extern unsigned long nsecs_to_usecs(unsigned long nsecs); | |
363 | ||
0e950173 TB |
364 | extern unsigned long tracing_thresh; |
365 | ||
5d4a9dba | 366 | #ifdef CONFIG_TRACER_MAX_TRACE |
bc0c38d1 | 367 | extern unsigned long tracing_max_latency; |
bc0c38d1 SR |
368 | |
369 | void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); | |
370 | void update_max_tr_single(struct trace_array *tr, | |
371 | struct task_struct *tsk, int cpu); | |
5d4a9dba | 372 | #endif /* CONFIG_TRACER_MAX_TRACE */ |
bc0c38d1 | 373 | |
c0a0d0d3 | 374 | #ifdef CONFIG_STACKTRACE |
e77405ad | 375 | void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
376 | int skip, int pc); |
377 | ||
e77405ad | 378 | void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, |
c0a0d0d3 FW |
379 | int pc); |
380 | ||
381 | void __trace_stack(struct trace_array *tr, unsigned long flags, int skip, | |
382 | int pc); | |
383 | #else | |
e1f7992e | 384 | static inline void ftrace_trace_stack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
385 | unsigned long flags, int skip, int pc) |
386 | { | |
387 | } | |
388 | ||
e1f7992e | 389 | static inline void ftrace_trace_userstack(struct ring_buffer *buffer, |
c0a0d0d3 FW |
390 | unsigned long flags, int pc) |
391 | { | |
392 | } | |
393 | ||
394 | static inline void __trace_stack(struct trace_array *tr, unsigned long flags, | |
395 | int skip, int pc) | |
396 | { | |
397 | } | |
398 | #endif /* CONFIG_STACKTRACE */ | |
53614991 | 399 | |
e309b41d | 400 | extern cycle_t ftrace_now(int cpu); |
bc0c38d1 | 401 | |
4ca53085 | 402 | extern void trace_find_cmdline(int pid, char comm[]); |
f7d48cbd | 403 | |
bc0c38d1 SR |
404 | #ifdef CONFIG_DYNAMIC_FTRACE |
405 | extern unsigned long ftrace_update_tot_cnt; | |
d05cdb25 SR |
406 | #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func |
407 | extern int DYN_FTRACE_TEST_NAME(void); | |
bc0c38d1 SR |
408 | #endif |
409 | ||
020e5f85 LZ |
410 | extern int ring_buffer_expanded; |
411 | extern bool tracing_selftest_disabled; | |
9288f99a | 412 | DECLARE_PER_CPU(int, ftrace_cpu_disabled); |
020e5f85 | 413 | |
60a11774 | 414 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
60a11774 SR |
415 | extern int trace_selftest_startup_function(struct tracer *trace, |
416 | struct trace_array *tr); | |
7447dce9 FW |
417 | extern int trace_selftest_startup_function_graph(struct tracer *trace, |
418 | struct trace_array *tr); | |
60a11774 SR |
419 | extern int trace_selftest_startup_irqsoff(struct tracer *trace, |
420 | struct trace_array *tr); | |
60a11774 SR |
421 | extern int trace_selftest_startup_preemptoff(struct tracer *trace, |
422 | struct trace_array *tr); | |
60a11774 SR |
423 | extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace, |
424 | struct trace_array *tr); | |
60a11774 SR |
425 | extern int trace_selftest_startup_wakeup(struct tracer *trace, |
426 | struct trace_array *tr); | |
fb1b6d8b SN |
427 | extern int trace_selftest_startup_nop(struct tracer *trace, |
428 | struct trace_array *tr); | |
60a11774 SR |
429 | extern int trace_selftest_startup_sched_switch(struct tracer *trace, |
430 | struct trace_array *tr); | |
a6dd24f8 IM |
431 | extern int trace_selftest_startup_sysprof(struct tracer *trace, |
432 | struct trace_array *tr); | |
80e5ea45 SR |
433 | extern int trace_selftest_startup_branch(struct tracer *trace, |
434 | struct trace_array *tr); | |
60a11774 SR |
435 | #endif /* CONFIG_FTRACE_STARTUP_TEST */ |
436 | ||
c7aafc54 | 437 | extern void *head_page(struct trace_array_cpu *data); |
cf8e3474 | 438 | extern unsigned long long ns2usecs(cycle_t nsec); |
1fd8f2a3 | 439 | extern int |
40ce74f1 | 440 | trace_vbprintk(unsigned long ip, const char *fmt, va_list args); |
48ead020 | 441 | extern int |
40ce74f1 | 442 | trace_vprintk(unsigned long ip, const char *fmt, va_list args); |
659372d3 SR |
443 | extern int |
444 | trace_array_vprintk(struct trace_array *tr, | |
445 | unsigned long ip, const char *fmt, va_list args); | |
446 | int trace_array_printk(struct trace_array *tr, | |
447 | unsigned long ip, const char *fmt, ...); | |
c7aafc54 | 448 | |
4e655519 IM |
449 | extern unsigned long trace_flags; |
450 | ||
5079f326 Z |
451 | extern int trace_clock_id; |
452 | ||
15e6cb36 | 453 | /* Standard output formatting function used for function return traces */ |
fb52607a | 454 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
62b915f1 JO |
455 | |
456 | /* Flag options */ | |
457 | #define TRACE_GRAPH_PRINT_OVERRUN 0x1 | |
458 | #define TRACE_GRAPH_PRINT_CPU 0x2 | |
459 | #define TRACE_GRAPH_PRINT_OVERHEAD 0x4 | |
460 | #define TRACE_GRAPH_PRINT_PROC 0x8 | |
461 | #define TRACE_GRAPH_PRINT_DURATION 0x10 | |
462 | #define TRACE_GRAPH_PRINT_ABS_TIME 0x20 | |
463 | ||
d7a8d9e9 JO |
464 | extern enum print_line_t |
465 | print_graph_function_flags(struct trace_iterator *iter, u32 flags); | |
466 | extern void print_graph_headers_flags(struct seq_file *s, u32 flags); | |
0706f1c4 SR |
467 | extern enum print_line_t |
468 | trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); | |
62b915f1 JO |
469 | extern void graph_trace_open(struct trace_iterator *iter); |
470 | extern void graph_trace_close(struct trace_iterator *iter); | |
471 | extern int __trace_graph_entry(struct trace_array *tr, | |
472 | struct ftrace_graph_ent *trace, | |
473 | unsigned long flags, int pc); | |
474 | extern void __trace_graph_return(struct trace_array *tr, | |
475 | struct ftrace_graph_ret *trace, | |
476 | unsigned long flags, int pc); | |
477 | ||
ea4e2bc4 SR |
478 | |
479 | #ifdef CONFIG_DYNAMIC_FTRACE | |
480 | /* TODO: make this variable */ | |
481 | #define FTRACE_GRAPH_MAX_FUNCS 32 | |
c7c6b1fe | 482 | extern int ftrace_graph_filter_enabled; |
ea4e2bc4 SR |
483 | extern int ftrace_graph_count; |
484 | extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS]; | |
485 | ||
486 | static inline int ftrace_graph_addr(unsigned long addr) | |
487 | { | |
488 | int i; | |
489 | ||
c7c6b1fe | 490 | if (!ftrace_graph_filter_enabled) |
ea4e2bc4 SR |
491 | return 1; |
492 | ||
493 | for (i = 0; i < ftrace_graph_count; i++) { | |
494 | if (addr == ftrace_graph_funcs[i]) | |
495 | return 1; | |
496 | } | |
497 | ||
498 | return 0; | |
499 | } | |
15e6cb36 | 500 | #else |
6b253930 IM |
501 | static inline int ftrace_graph_addr(unsigned long addr) |
502 | { | |
503 | return 1; | |
ea4e2bc4 SR |
504 | } |
505 | #endif /* CONFIG_DYNAMIC_FTRACE */ | |
ea4e2bc4 | 506 | #else /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 507 | static inline enum print_line_t |
d7a8d9e9 | 508 | print_graph_function_flags(struct trace_iterator *iter, u32 flags) |
15e6cb36 FW |
509 | { |
510 | return TRACE_TYPE_UNHANDLED; | |
511 | } | |
ea4e2bc4 | 512 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |
15e6cb36 | 513 | |
756d17ee | 514 | extern struct list_head ftrace_pids; |
804a6851 | 515 | |
1155de47 | 516 | #ifdef CONFIG_FUNCTION_TRACER |
804a6851 SR |
517 | static inline int ftrace_trace_task(struct task_struct *task) |
518 | { | |
756d17ee | 519 | if (list_empty(&ftrace_pids)) |
804a6851 SR |
520 | return 1; |
521 | ||
522 | return test_tsk_trace_trace(task); | |
523 | } | |
1155de47 PM |
524 | #else |
525 | static inline int ftrace_trace_task(struct task_struct *task) | |
526 | { | |
527 | return 1; | |
528 | } | |
529 | #endif | |
804a6851 | 530 | |
b63f39ea | 531 | /* |
532 | * struct trace_parser - servers for reading the user input separated by spaces | |
533 | * @cont: set if the input is not complete - no final space char was found | |
534 | * @buffer: holds the parsed user input | |
1537a363 | 535 | * @idx: user input length |
b63f39ea | 536 | * @size: buffer size |
537 | */ | |
538 | struct trace_parser { | |
539 | bool cont; | |
540 | char *buffer; | |
541 | unsigned idx; | |
542 | unsigned size; | |
543 | }; | |
544 | ||
545 | static inline bool trace_parser_loaded(struct trace_parser *parser) | |
546 | { | |
547 | return (parser->idx != 0); | |
548 | } | |
549 | ||
550 | static inline bool trace_parser_cont(struct trace_parser *parser) | |
551 | { | |
552 | return parser->cont; | |
553 | } | |
554 | ||
555 | static inline void trace_parser_clear(struct trace_parser *parser) | |
556 | { | |
557 | parser->cont = false; | |
558 | parser->idx = 0; | |
559 | } | |
560 | ||
561 | extern int trace_parser_get_init(struct trace_parser *parser, int size); | |
562 | extern void trace_parser_put(struct trace_parser *parser); | |
563 | extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf, | |
564 | size_t cnt, loff_t *ppos); | |
565 | ||
4fcdae83 SR |
566 | /* |
567 | * trace_iterator_flags is an enumeration that defines bit | |
568 | * positions into trace_flags that controls the output. | |
569 | * | |
570 | * NOTE: These bits must match the trace_options array in | |
571 | * trace.c. | |
572 | */ | |
4e655519 IM |
573 | enum trace_iterator_flags { |
574 | TRACE_ITER_PRINT_PARENT = 0x01, | |
575 | TRACE_ITER_SYM_OFFSET = 0x02, | |
576 | TRACE_ITER_SYM_ADDR = 0x04, | |
577 | TRACE_ITER_VERBOSE = 0x08, | |
578 | TRACE_ITER_RAW = 0x10, | |
579 | TRACE_ITER_HEX = 0x20, | |
580 | TRACE_ITER_BIN = 0x40, | |
581 | TRACE_ITER_BLOCK = 0x80, | |
582 | TRACE_ITER_STACKTRACE = 0x100, | |
2cbafd68 LZ |
583 | TRACE_ITER_PRINTK = 0x200, |
584 | TRACE_ITER_PREEMPTONLY = 0x400, | |
585 | TRACE_ITER_BRANCH = 0x800, | |
586 | TRACE_ITER_ANNOTATE = 0x1000, | |
587 | TRACE_ITER_USERSTACKTRACE = 0x2000, | |
588 | TRACE_ITER_SYM_USEROBJ = 0x4000, | |
589 | TRACE_ITER_PRINTK_MSGONLY = 0x8000, | |
590 | TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */ | |
591 | TRACE_ITER_LATENCY_FMT = 0x20000, | |
592 | TRACE_ITER_SLEEP_TIME = 0x40000, | |
593 | TRACE_ITER_GRAPH_TIME = 0x80000, | |
4e655519 IM |
594 | }; |
595 | ||
15e6cb36 FW |
596 | /* |
597 | * TRACE_ITER_SYM_MASK masks the options in trace_flags that | |
598 | * control the output of kernel symbols. | |
599 | */ | |
600 | #define TRACE_ITER_SYM_MASK \ | |
601 | (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR) | |
602 | ||
43a15386 FW |
603 | extern struct tracer nop_trace; |
604 | ||
2ed84eeb | 605 | #ifdef CONFIG_BRANCH_TRACER |
9f029e83 SR |
606 | extern int enable_branch_tracing(struct trace_array *tr); |
607 | extern void disable_branch_tracing(void); | |
608 | static inline int trace_branch_enable(struct trace_array *tr) | |
52f232cb | 609 | { |
9f029e83 SR |
610 | if (trace_flags & TRACE_ITER_BRANCH) |
611 | return enable_branch_tracing(tr); | |
52f232cb SR |
612 | return 0; |
613 | } | |
9f029e83 | 614 | static inline void trace_branch_disable(void) |
52f232cb SR |
615 | { |
616 | /* due to races, always disable */ | |
9f029e83 | 617 | disable_branch_tracing(); |
52f232cb SR |
618 | } |
619 | #else | |
9f029e83 | 620 | static inline int trace_branch_enable(struct trace_array *tr) |
52f232cb SR |
621 | { |
622 | return 0; | |
623 | } | |
9f029e83 | 624 | static inline void trace_branch_disable(void) |
52f232cb SR |
625 | { |
626 | } | |
2ed84eeb | 627 | #endif /* CONFIG_BRANCH_TRACER */ |
52f232cb | 628 | |
1852fcce SR |
629 | /* set ring buffers to default size if not already done so */ |
630 | int tracing_update_buffers(void); | |
631 | ||
fd994989 SR |
632 | /* trace event type bit fields, not numeric */ |
633 | enum { | |
634 | TRACE_EVENT_TYPE_PRINTF = 1, | |
635 | TRACE_EVENT_TYPE_RAW = 2, | |
636 | }; | |
637 | ||
cf027f64 TZ |
638 | struct ftrace_event_field { |
639 | struct list_head link; | |
640 | char *name; | |
641 | char *type; | |
aa38e9fc | 642 | int filter_type; |
cf027f64 TZ |
643 | int offset; |
644 | int size; | |
a118e4d1 | 645 | int is_signed; |
cf027f64 TZ |
646 | }; |
647 | ||
30e673b2 TZ |
648 | struct event_filter { |
649 | int n_preds; | |
650 | struct filter_pred **preds; | |
8b372562 | 651 | char *filter_string; |
30e673b2 TZ |
652 | }; |
653 | ||
cfb180f3 TZ |
654 | struct event_subsystem { |
655 | struct list_head list; | |
656 | const char *name; | |
657 | struct dentry *entry; | |
1f9963cb | 658 | struct event_filter *filter; |
dc82ec98 | 659 | int nr_events; |
cfb180f3 TZ |
660 | }; |
661 | ||
7ce7e424 | 662 | struct filter_pred; |
1889d209 | 663 | struct regex; |
7ce7e424 | 664 | |
8b372562 TZ |
665 | typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event, |
666 | int val1, int val2); | |
7ce7e424 | 667 | |
1889d209 FW |
668 | typedef int (*regex_match_func)(char *str, struct regex *r, int len); |
669 | ||
3f6fe06d | 670 | enum regex_type { |
b0f1a59a | 671 | MATCH_FULL = 0, |
3f6fe06d FW |
672 | MATCH_FRONT_ONLY, |
673 | MATCH_MIDDLE_ONLY, | |
674 | MATCH_END_ONLY, | |
675 | }; | |
676 | ||
1889d209 FW |
677 | struct regex { |
678 | char pattern[MAX_FILTER_STR_VAL]; | |
679 | int len; | |
680 | int field_len; | |
681 | regex_match_func match; | |
682 | }; | |
683 | ||
7ce7e424 | 684 | struct filter_pred { |
1889d209 FW |
685 | filter_pred_fn_t fn; |
686 | u64 val; | |
687 | struct regex regex; | |
688 | char *field_name; | |
689 | int offset; | |
690 | int not; | |
691 | int op; | |
692 | int pop_n; | |
7ce7e424 TZ |
693 | }; |
694 | ||
8728fe50 LZ |
695 | extern struct list_head ftrace_common_fields; |
696 | ||
3f6fe06d FW |
697 | extern enum regex_type |
698 | filter_parse_regex(char *buff, int len, char **search, int *not); | |
8b372562 | 699 | extern void print_event_filter(struct ftrace_event_call *call, |
4bda2d51 | 700 | struct trace_seq *s); |
8b372562 TZ |
701 | extern int apply_event_filter(struct ftrace_event_call *call, |
702 | char *filter_string); | |
703 | extern int apply_subsystem_event_filter(struct event_subsystem *system, | |
704 | char *filter_string); | |
705 | extern void print_subsystem_event_filter(struct event_subsystem *system, | |
ac1adc55 | 706 | struct trace_seq *s); |
aa38e9fc | 707 | extern int filter_assign_type(const char *type); |
7ce7e424 | 708 | |
2e33af02 SR |
709 | struct list_head * |
710 | trace_get_fields(struct ftrace_event_call *event_call); | |
711 | ||
eb02ce01 | 712 | static inline int |
e1112b4d | 713 | filter_check_discard(struct ftrace_event_call *call, void *rec, |
eb02ce01 | 714 | struct ring_buffer *buffer, |
e1112b4d TZ |
715 | struct ring_buffer_event *event) |
716 | { | |
553552ce | 717 | if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) && |
6fb2915d | 718 | !filter_match_preds(call->filter, rec)) { |
eb02ce01 TZ |
719 | ring_buffer_discard_commit(buffer, event); |
720 | return 1; | |
721 | } | |
722 | ||
723 | return 0; | |
e1112b4d TZ |
724 | } |
725 | ||
20c8928a | 726 | extern struct mutex event_mutex; |
a59fd602 | 727 | extern struct list_head ftrace_events; |
ac199db0 | 728 | |
e9fb2b6d SR |
729 | extern const char *__start___trace_bprintk_fmt[]; |
730 | extern const char *__stop___trace_bprintk_fmt[]; | |
731 | ||
4e5292ea SR |
732 | #undef FTRACE_ENTRY |
733 | #define FTRACE_ENTRY(call, struct_name, id, tstruct, print) \ | |
86c38a31 JM |
734 | extern struct ftrace_event_call \ |
735 | __attribute__((__aligned__(4))) event_##call; | |
4e5292ea SR |
736 | #undef FTRACE_ENTRY_DUP |
737 | #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print) \ | |
738 | FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print)) | |
739 | #include "trace_entries.h" | |
e1112b4d | 740 | |
bc0c38d1 | 741 | #endif /* _LINUX_KERNEL_TRACE_H */ |