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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 | ||
000ab691 SR |
109 | int ftrace_arch_code_modify_prepare(void); |
110 | int ftrace_arch_code_modify_post_process(void); | |
111 | ||
809dcf29 SR |
112 | struct seq_file; |
113 | ||
b6887d79 | 114 | struct ftrace_probe_ops { |
59df055f SR |
115 | void (*func)(unsigned long ip, |
116 | unsigned long parent_ip, | |
117 | void **data); | |
118 | int (*callback)(unsigned long ip, void **data); | |
119 | void (*free)(void **data); | |
809dcf29 SR |
120 | int (*print)(struct seq_file *m, |
121 | unsigned long ip, | |
b6887d79 | 122 | struct ftrace_probe_ops *ops, |
809dcf29 | 123 | void *data); |
59df055f SR |
124 | }; |
125 | ||
126 | extern int | |
b6887d79 | 127 | register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, |
59df055f SR |
128 | void *data); |
129 | extern void | |
b6887d79 | 130 | unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, |
59df055f SR |
131 | void *data); |
132 | extern void | |
b6887d79 SR |
133 | unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops); |
134 | extern void unregister_ftrace_function_probe_all(char *glob); | |
59df055f | 135 | |
3c1720f0 | 136 | enum { |
37ad5084 SR |
137 | FTRACE_FL_FREE = (1 << 0), |
138 | FTRACE_FL_FAILED = (1 << 1), | |
139 | FTRACE_FL_FILTER = (1 << 2), | |
140 | FTRACE_FL_ENABLED = (1 << 3), | |
41c52c0d | 141 | FTRACE_FL_NOTRACE = (1 << 4), |
0eb96701 | 142 | FTRACE_FL_CONVERTED = (1 << 5), |
ecea656d | 143 | FTRACE_FL_FROZEN = (1 << 6), |
3c1720f0 SR |
144 | }; |
145 | ||
3d083395 | 146 | struct dyn_ftrace { |
08f5ac90 SR |
147 | struct list_head list; |
148 | unsigned long ip; /* address of mcount call-site */ | |
149 | unsigned long flags; | |
31e88909 | 150 | struct dyn_arch_ftrace arch; |
3d083395 SR |
151 | }; |
152 | ||
e1c08bdd | 153 | int ftrace_force_update(void); |
77a2b37d | 154 | void ftrace_set_filter(unsigned char *buf, int len, int reset); |
e1c08bdd | 155 | |
f6180773 SR |
156 | int register_ftrace_command(struct ftrace_func_command *cmd); |
157 | int unregister_ftrace_command(struct ftrace_func_command *cmd); | |
158 | ||
3d083395 | 159 | /* defined in arch */ |
3c1720f0 | 160 | extern int ftrace_ip_converted(unsigned long ip); |
d61f82d0 | 161 | extern int ftrace_dyn_arch_init(void *data); |
d61f82d0 SR |
162 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
163 | extern void ftrace_caller(void); | |
164 | extern void ftrace_call(void); | |
165 | extern void mcount_call(void); | |
f0001207 SL |
166 | |
167 | #ifndef FTRACE_ADDR | |
168 | #define FTRACE_ADDR ((unsigned long)ftrace_caller) | |
169 | #endif | |
fb52607a FW |
170 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
171 | extern void ftrace_graph_caller(void); | |
5a45cfe1 SR |
172 | extern int ftrace_enable_ftrace_graph_caller(void); |
173 | extern int ftrace_disable_ftrace_graph_caller(void); | |
174 | #else | |
175 | static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; } | |
176 | static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; } | |
e7d3737e | 177 | #endif |
ad90c0e3 | 178 | |
31e88909 | 179 | /** |
57794a9d | 180 | * ftrace_make_nop - convert code into nop |
31e88909 SR |
181 | * @mod: module structure if called by module load initialization |
182 | * @rec: the mcount call site record | |
183 | * @addr: the address that the call site should be calling | |
184 | * | |
185 | * This is a very sensitive operation and great care needs | |
186 | * to be taken by the arch. The operation should carefully | |
187 | * read the location, check to see if what is read is indeed | |
188 | * what we expect it to be, and then on success of the compare, | |
189 | * it should write to the location. | |
190 | * | |
191 | * The code segment at @rec->ip should be a caller to @addr | |
192 | * | |
193 | * Return must be: | |
194 | * 0 on success | |
195 | * -EFAULT on error reading the location | |
196 | * -EINVAL on a failed compare of the contents | |
197 | * -EPERM on error writing to the location | |
198 | * Any other value will be considered a failure. | |
199 | */ | |
200 | extern int ftrace_make_nop(struct module *mod, | |
201 | struct dyn_ftrace *rec, unsigned long addr); | |
a26a2a27 | 202 | |
593eb8a2 | 203 | /** |
31e88909 SR |
204 | * ftrace_make_call - convert a nop call site into a call to addr |
205 | * @rec: the mcount call site record | |
206 | * @addr: the address that the call site should call | |
593eb8a2 SR |
207 | * |
208 | * This is a very sensitive operation and great care needs | |
209 | * to be taken by the arch. The operation should carefully | |
210 | * read the location, check to see if what is read is indeed | |
211 | * what we expect it to be, and then on success of the compare, | |
212 | * it should write to the location. | |
213 | * | |
31e88909 SR |
214 | * The code segment at @rec->ip should be a nop |
215 | * | |
593eb8a2 SR |
216 | * Return must be: |
217 | * 0 on success | |
218 | * -EFAULT on error reading the location | |
219 | * -EINVAL on a failed compare of the contents | |
220 | * -EPERM on error writing to the location | |
221 | * Any other value will be considered a failure. | |
222 | */ | |
31e88909 SR |
223 | extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr); |
224 | ||
225 | ||
226 | /* May be defined in arch */ | |
227 | extern int ftrace_arch_read_dyn_info(char *buf, int size); | |
593eb8a2 | 228 | |
ecea656d AS |
229 | extern int skip_trace(unsigned long ip); |
230 | ||
c0719e5a SR |
231 | extern void ftrace_release(void *start, unsigned long size); |
232 | ||
233 | extern void ftrace_disable_daemon(void); | |
234 | extern void ftrace_enable_daemon(void); | |
e1c08bdd | 235 | #else |
ecea656d | 236 | # define skip_trace(ip) ({ 0; }) |
aeaee8a2 IM |
237 | # define ftrace_force_update() ({ 0; }) |
238 | # define ftrace_set_filter(buf, len, reset) do { } while (0) | |
ad90c0e3 SR |
239 | # define ftrace_disable_daemon() do { } while (0) |
240 | # define ftrace_enable_daemon() do { } while (0) | |
c0719e5a | 241 | static inline void ftrace_release(void *start, unsigned long size) { } |
f6180773 SR |
242 | static inline int register_ftrace_command(struct ftrace_func_command *cmd) |
243 | { | |
97d0bb8d | 244 | return -EINVAL; |
f6180773 SR |
245 | } |
246 | static inline int unregister_ftrace_command(char *cmd_name) | |
247 | { | |
97d0bb8d | 248 | return -EINVAL; |
f6180773 | 249 | } |
ecea656d | 250 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
352ad25a | 251 | |
aeaee8a2 IM |
252 | /* totally disable ftrace - can not re-enable after this */ |
253 | void ftrace_kill(void); | |
254 | ||
f43fdad8 IM |
255 | static inline void tracer_disable(void) |
256 | { | |
606576ce | 257 | #ifdef CONFIG_FUNCTION_TRACER |
f43fdad8 IM |
258 | ftrace_enabled = 0; |
259 | #endif | |
260 | } | |
261 | ||
37002735 HY |
262 | /* |
263 | * Ftrace disable/restore without lock. Some synchronization mechanism | |
9bdeb7b5 | 264 | * must be used to prevent ftrace_enabled to be changed between |
37002735 HY |
265 | * disable/restore. |
266 | */ | |
9bdeb7b5 HY |
267 | static inline int __ftrace_enabled_save(void) |
268 | { | |
606576ce | 269 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
270 | int saved_ftrace_enabled = ftrace_enabled; |
271 | ftrace_enabled = 0; | |
272 | return saved_ftrace_enabled; | |
273 | #else | |
274 | return 0; | |
275 | #endif | |
276 | } | |
277 | ||
278 | static inline void __ftrace_enabled_restore(int enabled) | |
279 | { | |
606576ce | 280 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
281 | ftrace_enabled = enabled; |
282 | #endif | |
283 | } | |
284 | ||
352ad25a SR |
285 | #ifdef CONFIG_FRAME_POINTER |
286 | /* TODO: need to fix this for ARM */ | |
287 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
288 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
289 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
290 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
291 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
292 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
86387f7e | 293 | # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) |
352ad25a SR |
294 | #else |
295 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
296 | # define CALLER_ADDR1 0UL | |
297 | # define CALLER_ADDR2 0UL | |
298 | # define CALLER_ADDR3 0UL | |
299 | # define CALLER_ADDR4 0UL | |
300 | # define CALLER_ADDR5 0UL | |
86387f7e | 301 | # define CALLER_ADDR6 0UL |
352ad25a SR |
302 | #endif |
303 | ||
81d68a96 | 304 | #ifdef CONFIG_IRQSOFF_TRACER |
489f1396 IM |
305 | extern void time_hardirqs_on(unsigned long a0, unsigned long a1); |
306 | extern void time_hardirqs_off(unsigned long a0, unsigned long a1); | |
81d68a96 SR |
307 | #else |
308 | # define time_hardirqs_on(a0, a1) do { } while (0) | |
309 | # define time_hardirqs_off(a0, a1) do { } while (0) | |
310 | #endif | |
311 | ||
6cd8a4bb | 312 | #ifdef CONFIG_PREEMPT_TRACER |
489f1396 IM |
313 | extern void trace_preempt_on(unsigned long a0, unsigned long a1); |
314 | extern void trace_preempt_off(unsigned long a0, unsigned long a1); | |
6cd8a4bb SR |
315 | #else |
316 | # define trace_preempt_on(a0, a1) do { } while (0) | |
317 | # define trace_preempt_off(a0, a1) do { } while (0) | |
318 | #endif | |
319 | ||
b1829d27 | 320 | #ifdef CONFIG_TRACING |
944ac425 SR |
321 | extern int ftrace_dump_on_oops; |
322 | ||
0f048701 SR |
323 | extern void tracing_start(void); |
324 | extern void tracing_stop(void); | |
69bb54ec | 325 | extern void ftrace_off_permanent(void); |
0f048701 | 326 | |
74f4e369 IM |
327 | extern void |
328 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3); | |
2f2c99db SR |
329 | |
330 | /** | |
331 | * ftrace_printk - printf formatting in the ftrace buffer | |
332 | * @fmt: the printf format for printing | |
333 | * | |
334 | * Note: __ftrace_printk is an internal function for ftrace_printk and | |
335 | * the @ip is passed in via the ftrace_printk macro. | |
336 | * | |
337 | * This function allows a kernel developer to debug fast path sections | |
338 | * that printk is not appropriate for. By scattering in various | |
339 | * printk like tracing in the code, a developer can quickly see | |
340 | * where problems are occurring. | |
341 | * | |
342 | * This is intended as a debugging tool for the developer only. | |
343 | * Please refrain from leaving ftrace_printks scattered around in | |
344 | * your code. | |
345 | */ | |
346 | # define ftrace_printk(fmt...) __ftrace_printk(_THIS_IP_, fmt) | |
dd0e545f SR |
347 | extern int |
348 | __ftrace_printk(unsigned long ip, const char *fmt, ...) | |
349 | __attribute__ ((format (printf, 2, 3))); | |
9011262a ACM |
350 | # define ftrace_vprintk(fmt, ap) __ftrace_printk(_THIS_IP_, fmt, ap) |
351 | extern int | |
352 | __ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap); | |
3f5a54e3 | 353 | extern void ftrace_dump(void); |
74f4e369 IM |
354 | #else |
355 | static inline void | |
356 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { } | |
dd0e545f | 357 | static inline int |
3ddeb912 | 358 | ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); |
7b928c23 | 359 | |
0f048701 SR |
360 | static inline void tracing_start(void) { } |
361 | static inline void tracing_stop(void) { } | |
69bb54ec | 362 | static inline void ftrace_off_permanent(void) { } |
7b928c23 IM |
363 | static inline int |
364 | ftrace_printk(const char *fmt, ...) | |
dd0e545f SR |
365 | { |
366 | return 0; | |
367 | } | |
9011262a ACM |
368 | static inline int |
369 | ftrace_vprintk(const char *fmt, va_list ap) | |
370 | { | |
371 | return 0; | |
372 | } | |
3f5a54e3 | 373 | static inline void ftrace_dump(void) { } |
74f4e369 IM |
374 | #endif |
375 | ||
68bf21aa SR |
376 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
377 | extern void ftrace_init(void); | |
31e88909 SR |
378 | extern void ftrace_init_module(struct module *mod, |
379 | unsigned long *start, unsigned long *end); | |
68bf21aa SR |
380 | #else |
381 | static inline void ftrace_init(void) { } | |
90d595fe | 382 | static inline void |
31e88909 SR |
383 | ftrace_init_module(struct module *mod, |
384 | unsigned long *start, unsigned long *end) { } | |
68bf21aa SR |
385 | #endif |
386 | ||
287b6e68 FW |
387 | /* |
388 | * Structure that defines an entry function trace. | |
389 | */ | |
390 | struct ftrace_graph_ent { | |
391 | unsigned long func; /* Current function */ | |
392 | int depth; | |
393 | }; | |
dd0e545f | 394 | |
caf4b323 FW |
395 | /* |
396 | * Structure that defines a return function trace. | |
397 | */ | |
fb52607a | 398 | struct ftrace_graph_ret { |
caf4b323 FW |
399 | unsigned long func; /* Current function */ |
400 | unsigned long long calltime; | |
401 | unsigned long long rettime; | |
0231022c FW |
402 | /* Number of functions that overran the depth limit for current task */ |
403 | unsigned long overrun; | |
287b6e68 | 404 | int depth; |
caf4b323 FW |
405 | }; |
406 | ||
fb52607a | 407 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
8b96f011 | 408 | |
712406a6 SR |
409 | /* |
410 | * Stack of return addresses for functions | |
411 | * of a thread. | |
412 | * Used in struct thread_info | |
413 | */ | |
414 | struct ftrace_ret_stack { | |
415 | unsigned long ret; | |
416 | unsigned long func; | |
417 | unsigned long long calltime; | |
418 | }; | |
419 | ||
420 | /* | |
421 | * Primary handler of a function return. | |
422 | * It relays on ftrace_return_to_handler. | |
423 | * Defined in entry_32/64.S | |
424 | */ | |
425 | extern void return_to_handler(void); | |
426 | ||
427 | extern int | |
428 | ftrace_push_return_trace(unsigned long ret, unsigned long long time, | |
429 | unsigned long func, int *depth); | |
430 | extern void | |
431 | ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret); | |
432 | ||
8b96f011 FW |
433 | /* |
434 | * Sometimes we don't want to trace a function with the function | |
435 | * graph tracer but we want them to keep traced by the usual function | |
436 | * tracer if the function graph tracer is not configured. | |
437 | */ | |
438 | #define __notrace_funcgraph notrace | |
439 | ||
bcbc4f20 FW |
440 | /* |
441 | * We want to which function is an entrypoint of a hardirq. | |
442 | * That will help us to put a signal on output. | |
443 | */ | |
444 | #define __irq_entry __attribute__((__section__(".irqentry.text"))) | |
445 | ||
446 | /* Limits of hardirq entrypoints */ | |
447 | extern char __irqentry_text_start[]; | |
448 | extern char __irqentry_text_end[]; | |
449 | ||
f201ae23 FW |
450 | #define FTRACE_RETFUNC_DEPTH 50 |
451 | #define FTRACE_RETSTACK_ALLOC_SIZE 32 | |
287b6e68 FW |
452 | /* Type of the callback handlers for tracing function graph*/ |
453 | typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ | |
e49dc19c | 454 | typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ |
287b6e68 FW |
455 | |
456 | extern int register_ftrace_graph(trace_func_graph_ret_t retfunc, | |
457 | trace_func_graph_ent_t entryfunc); | |
458 | ||
14a866c5 SR |
459 | extern void ftrace_graph_stop(void); |
460 | ||
287b6e68 FW |
461 | /* The current handlers in use */ |
462 | extern trace_func_graph_ret_t ftrace_graph_return; | |
463 | extern trace_func_graph_ent_t ftrace_graph_entry; | |
caf4b323 | 464 | |
fb52607a | 465 | extern void unregister_ftrace_graph(void); |
f201ae23 | 466 | |
fb52607a FW |
467 | extern void ftrace_graph_init_task(struct task_struct *t); |
468 | extern void ftrace_graph_exit_task(struct task_struct *t); | |
21a8c466 FW |
469 | |
470 | static inline int task_curr_ret_stack(struct task_struct *t) | |
471 | { | |
472 | return t->curr_ret_stack; | |
473 | } | |
380c4b14 FW |
474 | |
475 | static inline void pause_graph_tracing(void) | |
476 | { | |
477 | atomic_inc(¤t->tracing_graph_pause); | |
478 | } | |
479 | ||
480 | static inline void unpause_graph_tracing(void) | |
481 | { | |
482 | atomic_dec(¤t->tracing_graph_pause); | |
483 | } | |
82f60f0b | 484 | #else |
8b96f011 FW |
485 | |
486 | #define __notrace_funcgraph | |
bcbc4f20 | 487 | #define __irq_entry |
8b96f011 | 488 | |
fb52607a FW |
489 | static inline void ftrace_graph_init_task(struct task_struct *t) { } |
490 | static inline void ftrace_graph_exit_task(struct task_struct *t) { } | |
21a8c466 FW |
491 | |
492 | static inline int task_curr_ret_stack(struct task_struct *tsk) | |
493 | { | |
494 | return -1; | |
495 | } | |
380c4b14 FW |
496 | |
497 | static inline void pause_graph_tracing(void) { } | |
498 | static inline void unpause_graph_tracing(void) { } | |
caf4b323 FW |
499 | #endif |
500 | ||
ea4e2bc4 SR |
501 | #ifdef CONFIG_TRACING |
502 | #include <linux/sched.h> | |
503 | ||
504 | /* flags for current->trace */ | |
505 | enum { | |
506 | TSK_TRACE_FL_TRACE_BIT = 0, | |
507 | TSK_TRACE_FL_GRAPH_BIT = 1, | |
508 | }; | |
509 | enum { | |
510 | TSK_TRACE_FL_TRACE = 1 << TSK_TRACE_FL_TRACE_BIT, | |
511 | TSK_TRACE_FL_GRAPH = 1 << TSK_TRACE_FL_GRAPH_BIT, | |
512 | }; | |
513 | ||
514 | static inline void set_tsk_trace_trace(struct task_struct *tsk) | |
515 | { | |
516 | set_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
517 | } | |
518 | ||
519 | static inline void clear_tsk_trace_trace(struct task_struct *tsk) | |
520 | { | |
521 | clear_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
522 | } | |
523 | ||
524 | static inline int test_tsk_trace_trace(struct task_struct *tsk) | |
525 | { | |
526 | return tsk->trace & TSK_TRACE_FL_TRACE; | |
527 | } | |
528 | ||
529 | static inline void set_tsk_trace_graph(struct task_struct *tsk) | |
530 | { | |
531 | set_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
532 | } | |
533 | ||
534 | static inline void clear_tsk_trace_graph(struct task_struct *tsk) | |
535 | { | |
536 | clear_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
537 | } | |
538 | ||
539 | static inline int test_tsk_trace_graph(struct task_struct *tsk) | |
540 | { | |
541 | return tsk->trace & TSK_TRACE_FL_GRAPH; | |
542 | } | |
543 | ||
544 | #endif /* CONFIG_TRACING */ | |
545 | ||
b1818748 MM |
546 | |
547 | #ifdef CONFIG_HW_BRANCH_TRACER | |
548 | ||
549 | void trace_hw_branch(u64 from, u64 to); | |
550 | void trace_hw_branch_oops(void); | |
551 | ||
552 | #else /* CONFIG_HW_BRANCH_TRACER */ | |
553 | ||
554 | static inline void trace_hw_branch(u64 from, u64 to) {} | |
555 | static inline void trace_hw_branch_oops(void) {} | |
556 | ||
557 | #endif /* CONFIG_HW_BRANCH_TRACER */ | |
558 | ||
16444a8a | 559 | #endif /* _LINUX_FTRACE_H */ |