Commit | Line | Data |
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16444a8a ACM |
1 | #ifndef _LINUX_FTRACE_H |
2 | #define _LINUX_FTRACE_H | |
3 | ||
16444a8a | 4 | #include <linux/linkage.h> |
d49dbf33 | 5 | #include <linux/fs.h> |
eb7fa935 | 6 | #include <linux/ktime.h> |
d13744cd FW |
7 | #include <linux/init.h> |
8 | #include <linux/types.h> | |
9c246247 | 9 | #include <linux/module.h> |
5601020f | 10 | #include <linux/kallsyms.h> |
ea4e2bc4 | 11 | #include <linux/bitops.h> |
21a8c466 | 12 | #include <linux/sched.h> |
16444a8a | 13 | |
606576ce | 14 | #ifdef CONFIG_FUNCTION_TRACER |
3e1932ad | 15 | |
b0fc494f SR |
16 | extern int ftrace_enabled; |
17 | extern int | |
18 | ftrace_enable_sysctl(struct ctl_table *table, int write, | |
19 | struct file *filp, void __user *buffer, size_t *lenp, | |
20 | loff_t *ppos); | |
21 | ||
16444a8a ACM |
22 | typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip); |
23 | ||
24 | struct ftrace_ops { | |
25 | ftrace_func_t func; | |
26 | struct ftrace_ops *next; | |
27 | }; | |
28 | ||
60a7ecf4 SR |
29 | extern int function_trace_stop; |
30 | ||
e7d3737e FW |
31 | /* |
32 | * Type of the current tracing. | |
33 | */ | |
34 | enum ftrace_tracing_type_t { | |
35 | FTRACE_TYPE_ENTER = 0, /* Hook the call of the function */ | |
36 | FTRACE_TYPE_RETURN, /* Hook the return of the function */ | |
37 | }; | |
38 | ||
39 | /* Current tracing type, default is FTRACE_TYPE_ENTER */ | |
40 | extern enum ftrace_tracing_type_t ftrace_tracing_type; | |
41 | ||
60a7ecf4 SR |
42 | /** |
43 | * ftrace_stop - stop function tracer. | |
44 | * | |
45 | * A quick way to stop the function tracer. Note this an on off switch, | |
46 | * it is not something that is recursive like preempt_disable. | |
47 | * This does not disable the calling of mcount, it only stops the | |
48 | * calling of functions from mcount. | |
49 | */ | |
50 | static inline void ftrace_stop(void) | |
51 | { | |
52 | function_trace_stop = 1; | |
53 | } | |
54 | ||
55 | /** | |
56 | * ftrace_start - start the function tracer. | |
57 | * | |
58 | * This function is the inverse of ftrace_stop. This does not enable | |
59 | * the function tracing if the function tracer is disabled. This only | |
60 | * sets the function tracer flag to continue calling the functions | |
61 | * from mcount. | |
62 | */ | |
63 | static inline void ftrace_start(void) | |
64 | { | |
65 | function_trace_stop = 0; | |
66 | } | |
67 | ||
16444a8a ACM |
68 | /* |
69 | * The ftrace_ops must be a static and should also | |
70 | * be read_mostly. These functions do modify read_mostly variables | |
71 | * so use them sparely. Never free an ftrace_op or modify the | |
72 | * next pointer after it has been registered. Even after unregistering | |
73 | * it, the next pointer may still be used internally. | |
74 | */ | |
75 | int register_ftrace_function(struct ftrace_ops *ops); | |
76 | int unregister_ftrace_function(struct ftrace_ops *ops); | |
77 | void clear_ftrace_function(void); | |
78 | ||
79 | extern void ftrace_stub(unsigned long a0, unsigned long a1); | |
16444a8a | 80 | |
606576ce | 81 | #else /* !CONFIG_FUNCTION_TRACER */ |
16444a8a ACM |
82 | # define register_ftrace_function(ops) do { } while (0) |
83 | # define unregister_ftrace_function(ops) do { } while (0) | |
84 | # define clear_ftrace_function(ops) do { } while (0) | |
81adbdc0 | 85 | static inline void ftrace_kill(void) { } |
60a7ecf4 SR |
86 | static inline void ftrace_stop(void) { } |
87 | static inline void ftrace_start(void) { } | |
606576ce | 88 | #endif /* CONFIG_FUNCTION_TRACER */ |
352ad25a | 89 | |
f38f1d2a SR |
90 | #ifdef CONFIG_STACK_TRACER |
91 | extern int stack_tracer_enabled; | |
92 | int | |
93 | stack_trace_sysctl(struct ctl_table *table, int write, | |
94 | struct file *file, void __user *buffer, size_t *lenp, | |
95 | loff_t *ppos); | |
96 | #endif | |
97 | ||
f6180773 SR |
98 | struct ftrace_func_command { |
99 | struct list_head list; | |
100 | char *name; | |
101 | int (*func)(char *func, char *cmd, | |
102 | char *params, int enable); | |
103 | }; | |
104 | ||
3d083395 | 105 | #ifdef CONFIG_DYNAMIC_FTRACE |
31e88909 SR |
106 | /* asm/ftrace.h must be defined for archs supporting dynamic ftrace */ |
107 | #include <asm/ftrace.h> | |
108 | ||
809dcf29 SR |
109 | struct seq_file; |
110 | ||
b6887d79 | 111 | struct ftrace_probe_ops { |
59df055f SR |
112 | void (*func)(unsigned long ip, |
113 | unsigned long parent_ip, | |
114 | void **data); | |
115 | int (*callback)(unsigned long ip, void **data); | |
116 | void (*free)(void **data); | |
809dcf29 SR |
117 | int (*print)(struct seq_file *m, |
118 | unsigned long ip, | |
b6887d79 | 119 | struct ftrace_probe_ops *ops, |
809dcf29 | 120 | void *data); |
59df055f SR |
121 | }; |
122 | ||
123 | extern int | |
b6887d79 | 124 | register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, |
59df055f SR |
125 | void *data); |
126 | extern void | |
b6887d79 | 127 | unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, |
59df055f SR |
128 | void *data); |
129 | extern void | |
b6887d79 SR |
130 | unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops); |
131 | extern void unregister_ftrace_function_probe_all(char *glob); | |
59df055f | 132 | |
3c1720f0 | 133 | enum { |
37ad5084 SR |
134 | FTRACE_FL_FREE = (1 << 0), |
135 | FTRACE_FL_FAILED = (1 << 1), | |
136 | FTRACE_FL_FILTER = (1 << 2), | |
137 | FTRACE_FL_ENABLED = (1 << 3), | |
41c52c0d | 138 | FTRACE_FL_NOTRACE = (1 << 4), |
0eb96701 | 139 | FTRACE_FL_CONVERTED = (1 << 5), |
ecea656d | 140 | FTRACE_FL_FROZEN = (1 << 6), |
3c1720f0 SR |
141 | }; |
142 | ||
3d083395 | 143 | struct dyn_ftrace { |
08f5ac90 SR |
144 | struct list_head list; |
145 | unsigned long ip; /* address of mcount call-site */ | |
146 | unsigned long flags; | |
31e88909 | 147 | struct dyn_arch_ftrace arch; |
3d083395 SR |
148 | }; |
149 | ||
e1c08bdd | 150 | int ftrace_force_update(void); |
77a2b37d | 151 | void ftrace_set_filter(unsigned char *buf, int len, int reset); |
e1c08bdd | 152 | |
f6180773 SR |
153 | int register_ftrace_command(struct ftrace_func_command *cmd); |
154 | int unregister_ftrace_command(struct ftrace_func_command *cmd); | |
155 | ||
3d083395 | 156 | /* defined in arch */ |
3c1720f0 | 157 | extern int ftrace_ip_converted(unsigned long ip); |
d61f82d0 | 158 | extern int ftrace_dyn_arch_init(void *data); |
d61f82d0 SR |
159 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
160 | extern void ftrace_caller(void); | |
161 | extern void ftrace_call(void); | |
162 | extern void mcount_call(void); | |
f0001207 SL |
163 | |
164 | #ifndef FTRACE_ADDR | |
165 | #define FTRACE_ADDR ((unsigned long)ftrace_caller) | |
166 | #endif | |
fb52607a FW |
167 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
168 | extern void ftrace_graph_caller(void); | |
5a45cfe1 SR |
169 | extern int ftrace_enable_ftrace_graph_caller(void); |
170 | extern int ftrace_disable_ftrace_graph_caller(void); | |
171 | #else | |
172 | static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; } | |
173 | static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; } | |
e7d3737e | 174 | #endif |
ad90c0e3 | 175 | |
31e88909 | 176 | /** |
57794a9d | 177 | * ftrace_make_nop - convert code into nop |
31e88909 SR |
178 | * @mod: module structure if called by module load initialization |
179 | * @rec: the mcount call site record | |
180 | * @addr: the address that the call site should be calling | |
181 | * | |
182 | * This is a very sensitive operation and great care needs | |
183 | * to be taken by the arch. The operation should carefully | |
184 | * read the location, check to see if what is read is indeed | |
185 | * what we expect it to be, and then on success of the compare, | |
186 | * it should write to the location. | |
187 | * | |
188 | * The code segment at @rec->ip should be a caller to @addr | |
189 | * | |
190 | * Return must be: | |
191 | * 0 on success | |
192 | * -EFAULT on error reading the location | |
193 | * -EINVAL on a failed compare of the contents | |
194 | * -EPERM on error writing to the location | |
195 | * Any other value will be considered a failure. | |
196 | */ | |
197 | extern int ftrace_make_nop(struct module *mod, | |
198 | struct dyn_ftrace *rec, unsigned long addr); | |
a26a2a27 | 199 | |
593eb8a2 | 200 | /** |
31e88909 SR |
201 | * ftrace_make_call - convert a nop call site into a call to addr |
202 | * @rec: the mcount call site record | |
203 | * @addr: the address that the call site should call | |
593eb8a2 SR |
204 | * |
205 | * This is a very sensitive operation and great care needs | |
206 | * to be taken by the arch. The operation should carefully | |
207 | * read the location, check to see if what is read is indeed | |
208 | * what we expect it to be, and then on success of the compare, | |
209 | * it should write to the location. | |
210 | * | |
31e88909 SR |
211 | * The code segment at @rec->ip should be a nop |
212 | * | |
593eb8a2 SR |
213 | * Return must be: |
214 | * 0 on success | |
215 | * -EFAULT on error reading the location | |
216 | * -EINVAL on a failed compare of the contents | |
217 | * -EPERM on error writing to the location | |
218 | * Any other value will be considered a failure. | |
219 | */ | |
31e88909 SR |
220 | extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr); |
221 | ||
222 | ||
223 | /* May be defined in arch */ | |
224 | extern int ftrace_arch_read_dyn_info(char *buf, int size); | |
593eb8a2 | 225 | |
ecea656d AS |
226 | extern int skip_trace(unsigned long ip); |
227 | ||
c0719e5a SR |
228 | extern void ftrace_release(void *start, unsigned long size); |
229 | ||
230 | extern void ftrace_disable_daemon(void); | |
231 | extern void ftrace_enable_daemon(void); | |
e1c08bdd | 232 | #else |
ecea656d | 233 | # define skip_trace(ip) ({ 0; }) |
aeaee8a2 IM |
234 | # define ftrace_force_update() ({ 0; }) |
235 | # define ftrace_set_filter(buf, len, reset) do { } while (0) | |
ad90c0e3 SR |
236 | # define ftrace_disable_daemon() do { } while (0) |
237 | # define ftrace_enable_daemon() do { } while (0) | |
c0719e5a | 238 | static inline void ftrace_release(void *start, unsigned long size) { } |
f6180773 SR |
239 | static inline int register_ftrace_command(struct ftrace_func_command *cmd) |
240 | { | |
97d0bb8d | 241 | return -EINVAL; |
f6180773 SR |
242 | } |
243 | static inline int unregister_ftrace_command(char *cmd_name) | |
244 | { | |
97d0bb8d | 245 | return -EINVAL; |
f6180773 | 246 | } |
ecea656d | 247 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
352ad25a | 248 | |
aeaee8a2 IM |
249 | /* totally disable ftrace - can not re-enable after this */ |
250 | void ftrace_kill(void); | |
251 | ||
f43fdad8 IM |
252 | static inline void tracer_disable(void) |
253 | { | |
606576ce | 254 | #ifdef CONFIG_FUNCTION_TRACER |
f43fdad8 IM |
255 | ftrace_enabled = 0; |
256 | #endif | |
257 | } | |
258 | ||
37002735 HY |
259 | /* |
260 | * Ftrace disable/restore without lock. Some synchronization mechanism | |
9bdeb7b5 | 261 | * must be used to prevent ftrace_enabled to be changed between |
37002735 HY |
262 | * disable/restore. |
263 | */ | |
9bdeb7b5 HY |
264 | static inline int __ftrace_enabled_save(void) |
265 | { | |
606576ce | 266 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
267 | int saved_ftrace_enabled = ftrace_enabled; |
268 | ftrace_enabled = 0; | |
269 | return saved_ftrace_enabled; | |
270 | #else | |
271 | return 0; | |
272 | #endif | |
273 | } | |
274 | ||
275 | static inline void __ftrace_enabled_restore(int enabled) | |
276 | { | |
606576ce | 277 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
278 | ftrace_enabled = enabled; |
279 | #endif | |
280 | } | |
281 | ||
352ad25a SR |
282 | #ifdef CONFIG_FRAME_POINTER |
283 | /* TODO: need to fix this for ARM */ | |
284 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
285 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
286 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
287 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
288 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
289 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
86387f7e | 290 | # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) |
352ad25a SR |
291 | #else |
292 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
293 | # define CALLER_ADDR1 0UL | |
294 | # define CALLER_ADDR2 0UL | |
295 | # define CALLER_ADDR3 0UL | |
296 | # define CALLER_ADDR4 0UL | |
297 | # define CALLER_ADDR5 0UL | |
86387f7e | 298 | # define CALLER_ADDR6 0UL |
352ad25a SR |
299 | #endif |
300 | ||
81d68a96 | 301 | #ifdef CONFIG_IRQSOFF_TRACER |
489f1396 IM |
302 | extern void time_hardirqs_on(unsigned long a0, unsigned long a1); |
303 | extern void time_hardirqs_off(unsigned long a0, unsigned long a1); | |
81d68a96 SR |
304 | #else |
305 | # define time_hardirqs_on(a0, a1) do { } while (0) | |
306 | # define time_hardirqs_off(a0, a1) do { } while (0) | |
307 | #endif | |
308 | ||
6cd8a4bb | 309 | #ifdef CONFIG_PREEMPT_TRACER |
489f1396 IM |
310 | extern void trace_preempt_on(unsigned long a0, unsigned long a1); |
311 | extern void trace_preempt_off(unsigned long a0, unsigned long a1); | |
6cd8a4bb SR |
312 | #else |
313 | # define trace_preempt_on(a0, a1) do { } while (0) | |
314 | # define trace_preempt_off(a0, a1) do { } while (0) | |
315 | #endif | |
316 | ||
b1829d27 | 317 | #ifdef CONFIG_TRACING |
944ac425 SR |
318 | extern int ftrace_dump_on_oops; |
319 | ||
0f048701 SR |
320 | extern void tracing_start(void); |
321 | extern void tracing_stop(void); | |
69bb54ec | 322 | extern void ftrace_off_permanent(void); |
0f048701 | 323 | |
74f4e369 IM |
324 | extern void |
325 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3); | |
2f2c99db SR |
326 | |
327 | /** | |
328 | * ftrace_printk - printf formatting in the ftrace buffer | |
329 | * @fmt: the printf format for printing | |
330 | * | |
331 | * Note: __ftrace_printk is an internal function for ftrace_printk and | |
332 | * the @ip is passed in via the ftrace_printk macro. | |
333 | * | |
334 | * This function allows a kernel developer to debug fast path sections | |
335 | * that printk is not appropriate for. By scattering in various | |
336 | * printk like tracing in the code, a developer can quickly see | |
337 | * where problems are occurring. | |
338 | * | |
339 | * This is intended as a debugging tool for the developer only. | |
340 | * Please refrain from leaving ftrace_printks scattered around in | |
341 | * your code. | |
342 | */ | |
343 | # define ftrace_printk(fmt...) __ftrace_printk(_THIS_IP_, fmt) | |
dd0e545f SR |
344 | extern int |
345 | __ftrace_printk(unsigned long ip, const char *fmt, ...) | |
346 | __attribute__ ((format (printf, 2, 3))); | |
9011262a ACM |
347 | # define ftrace_vprintk(fmt, ap) __ftrace_printk(_THIS_IP_, fmt, ap) |
348 | extern int | |
349 | __ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap); | |
3f5a54e3 | 350 | extern void ftrace_dump(void); |
74f4e369 IM |
351 | #else |
352 | static inline void | |
353 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { } | |
dd0e545f | 354 | static inline int |
3ddeb912 | 355 | ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); |
7b928c23 | 356 | |
0f048701 SR |
357 | static inline void tracing_start(void) { } |
358 | static inline void tracing_stop(void) { } | |
69bb54ec | 359 | static inline void ftrace_off_permanent(void) { } |
7b928c23 IM |
360 | static inline int |
361 | ftrace_printk(const char *fmt, ...) | |
dd0e545f SR |
362 | { |
363 | return 0; | |
364 | } | |
9011262a ACM |
365 | static inline int |
366 | ftrace_vprintk(const char *fmt, va_list ap) | |
367 | { | |
368 | return 0; | |
369 | } | |
3f5a54e3 | 370 | static inline void ftrace_dump(void) { } |
74f4e369 IM |
371 | #endif |
372 | ||
68bf21aa SR |
373 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
374 | extern void ftrace_init(void); | |
31e88909 SR |
375 | extern void ftrace_init_module(struct module *mod, |
376 | unsigned long *start, unsigned long *end); | |
68bf21aa SR |
377 | #else |
378 | static inline void ftrace_init(void) { } | |
90d595fe | 379 | static inline void |
31e88909 SR |
380 | ftrace_init_module(struct module *mod, |
381 | unsigned long *start, unsigned long *end) { } | |
68bf21aa SR |
382 | #endif |
383 | ||
287b6e68 FW |
384 | /* |
385 | * Structure that defines an entry function trace. | |
386 | */ | |
387 | struct ftrace_graph_ent { | |
388 | unsigned long func; /* Current function */ | |
389 | int depth; | |
390 | }; | |
dd0e545f | 391 | |
caf4b323 FW |
392 | /* |
393 | * Structure that defines a return function trace. | |
394 | */ | |
fb52607a | 395 | struct ftrace_graph_ret { |
caf4b323 FW |
396 | unsigned long func; /* Current function */ |
397 | unsigned long long calltime; | |
398 | unsigned long long rettime; | |
0231022c FW |
399 | /* Number of functions that overran the depth limit for current task */ |
400 | unsigned long overrun; | |
287b6e68 | 401 | int depth; |
caf4b323 FW |
402 | }; |
403 | ||
fb52607a | 404 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
8b96f011 | 405 | |
712406a6 SR |
406 | /* |
407 | * Stack of return addresses for functions | |
408 | * of a thread. | |
409 | * Used in struct thread_info | |
410 | */ | |
411 | struct ftrace_ret_stack { | |
412 | unsigned long ret; | |
413 | unsigned long func; | |
414 | unsigned long long calltime; | |
415 | }; | |
416 | ||
417 | /* | |
418 | * Primary handler of a function return. | |
419 | * It relays on ftrace_return_to_handler. | |
420 | * Defined in entry_32/64.S | |
421 | */ | |
422 | extern void return_to_handler(void); | |
423 | ||
424 | extern int | |
425 | ftrace_push_return_trace(unsigned long ret, unsigned long long time, | |
426 | unsigned long func, int *depth); | |
427 | extern void | |
428 | ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret); | |
429 | ||
8b96f011 FW |
430 | /* |
431 | * Sometimes we don't want to trace a function with the function | |
432 | * graph tracer but we want them to keep traced by the usual function | |
433 | * tracer if the function graph tracer is not configured. | |
434 | */ | |
435 | #define __notrace_funcgraph notrace | |
436 | ||
bcbc4f20 FW |
437 | /* |
438 | * We want to which function is an entrypoint of a hardirq. | |
439 | * That will help us to put a signal on output. | |
440 | */ | |
441 | #define __irq_entry __attribute__((__section__(".irqentry.text"))) | |
442 | ||
443 | /* Limits of hardirq entrypoints */ | |
444 | extern char __irqentry_text_start[]; | |
445 | extern char __irqentry_text_end[]; | |
446 | ||
f201ae23 FW |
447 | #define FTRACE_RETFUNC_DEPTH 50 |
448 | #define FTRACE_RETSTACK_ALLOC_SIZE 32 | |
287b6e68 FW |
449 | /* Type of the callback handlers for tracing function graph*/ |
450 | typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ | |
e49dc19c | 451 | typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ |
287b6e68 FW |
452 | |
453 | extern int register_ftrace_graph(trace_func_graph_ret_t retfunc, | |
454 | trace_func_graph_ent_t entryfunc); | |
455 | ||
14a866c5 SR |
456 | extern void ftrace_graph_stop(void); |
457 | ||
287b6e68 FW |
458 | /* The current handlers in use */ |
459 | extern trace_func_graph_ret_t ftrace_graph_return; | |
460 | extern trace_func_graph_ent_t ftrace_graph_entry; | |
caf4b323 | 461 | |
fb52607a | 462 | extern void unregister_ftrace_graph(void); |
f201ae23 | 463 | |
fb52607a FW |
464 | extern void ftrace_graph_init_task(struct task_struct *t); |
465 | extern void ftrace_graph_exit_task(struct task_struct *t); | |
21a8c466 FW |
466 | |
467 | static inline int task_curr_ret_stack(struct task_struct *t) | |
468 | { | |
469 | return t->curr_ret_stack; | |
470 | } | |
380c4b14 FW |
471 | |
472 | static inline void pause_graph_tracing(void) | |
473 | { | |
474 | atomic_inc(¤t->tracing_graph_pause); | |
475 | } | |
476 | ||
477 | static inline void unpause_graph_tracing(void) | |
478 | { | |
479 | atomic_dec(¤t->tracing_graph_pause); | |
480 | } | |
82f60f0b | 481 | #else |
8b96f011 FW |
482 | |
483 | #define __notrace_funcgraph | |
bcbc4f20 | 484 | #define __irq_entry |
8b96f011 | 485 | |
fb52607a FW |
486 | static inline void ftrace_graph_init_task(struct task_struct *t) { } |
487 | static inline void ftrace_graph_exit_task(struct task_struct *t) { } | |
21a8c466 FW |
488 | |
489 | static inline int task_curr_ret_stack(struct task_struct *tsk) | |
490 | { | |
491 | return -1; | |
492 | } | |
380c4b14 FW |
493 | |
494 | static inline void pause_graph_tracing(void) { } | |
495 | static inline void unpause_graph_tracing(void) { } | |
caf4b323 FW |
496 | #endif |
497 | ||
ea4e2bc4 SR |
498 | #ifdef CONFIG_TRACING |
499 | #include <linux/sched.h> | |
500 | ||
501 | /* flags for current->trace */ | |
502 | enum { | |
503 | TSK_TRACE_FL_TRACE_BIT = 0, | |
504 | TSK_TRACE_FL_GRAPH_BIT = 1, | |
505 | }; | |
506 | enum { | |
507 | TSK_TRACE_FL_TRACE = 1 << TSK_TRACE_FL_TRACE_BIT, | |
508 | TSK_TRACE_FL_GRAPH = 1 << TSK_TRACE_FL_GRAPH_BIT, | |
509 | }; | |
510 | ||
511 | static inline void set_tsk_trace_trace(struct task_struct *tsk) | |
512 | { | |
513 | set_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
514 | } | |
515 | ||
516 | static inline void clear_tsk_trace_trace(struct task_struct *tsk) | |
517 | { | |
518 | clear_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
519 | } | |
520 | ||
521 | static inline int test_tsk_trace_trace(struct task_struct *tsk) | |
522 | { | |
523 | return tsk->trace & TSK_TRACE_FL_TRACE; | |
524 | } | |
525 | ||
526 | static inline void set_tsk_trace_graph(struct task_struct *tsk) | |
527 | { | |
528 | set_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
529 | } | |
530 | ||
531 | static inline void clear_tsk_trace_graph(struct task_struct *tsk) | |
532 | { | |
533 | clear_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
534 | } | |
535 | ||
536 | static inline int test_tsk_trace_graph(struct task_struct *tsk) | |
537 | { | |
538 | return tsk->trace & TSK_TRACE_FL_GRAPH; | |
539 | } | |
540 | ||
541 | #endif /* CONFIG_TRACING */ | |
542 | ||
b1818748 MM |
543 | |
544 | #ifdef CONFIG_HW_BRANCH_TRACER | |
545 | ||
546 | void trace_hw_branch(u64 from, u64 to); | |
547 | void trace_hw_branch_oops(void); | |
548 | ||
549 | #else /* CONFIG_HW_BRANCH_TRACER */ | |
550 | ||
551 | static inline void trace_hw_branch(u64 from, u64 to) {} | |
552 | static inline void trace_hw_branch_oops(void) {} | |
553 | ||
554 | #endif /* CONFIG_HW_BRANCH_TRACER */ | |
555 | ||
16444a8a | 556 | #endif /* _LINUX_FTRACE_H */ |