Commit | Line | Data |
---|---|---|
9849ed4d MF |
1 | /* |
2 | * Ftrace header. For implementation details beyond the random comments | |
3 | * scattered below, see: Documentation/trace/ftrace-design.txt | |
4 | */ | |
5 | ||
16444a8a ACM |
6 | #ifndef _LINUX_FTRACE_H |
7 | #define _LINUX_FTRACE_H | |
8 | ||
0012693a | 9 | #include <linux/trace_clock.h> |
5601020f | 10 | #include <linux/kallsyms.h> |
0012693a | 11 | #include <linux/linkage.h> |
ea4e2bc4 | 12 | #include <linux/bitops.h> |
0012693a FW |
13 | #include <linux/module.h> |
14 | #include <linux/ktime.h> | |
21a8c466 | 15 | #include <linux/sched.h> |
0012693a FW |
16 | #include <linux/types.h> |
17 | #include <linux/init.h> | |
18 | #include <linux/fs.h> | |
16444a8a | 19 | |
c79a61f5 UKK |
20 | #include <asm/ftrace.h> |
21 | ||
606576ce | 22 | #ifdef CONFIG_FUNCTION_TRACER |
3e1932ad | 23 | |
b0fc494f SR |
24 | extern int ftrace_enabled; |
25 | extern int | |
26 | ftrace_enable_sysctl(struct ctl_table *table, int write, | |
8d65af78 | 27 | void __user *buffer, size_t *lenp, |
b0fc494f SR |
28 | loff_t *ppos); |
29 | ||
16444a8a ACM |
30 | typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip); |
31 | ||
32 | struct ftrace_ops { | |
33 | ftrace_func_t func; | |
34 | struct ftrace_ops *next; | |
35 | }; | |
36 | ||
60a7ecf4 SR |
37 | extern int function_trace_stop; |
38 | ||
e7d3737e FW |
39 | /* |
40 | * Type of the current tracing. | |
41 | */ | |
42 | enum ftrace_tracing_type_t { | |
43 | FTRACE_TYPE_ENTER = 0, /* Hook the call of the function */ | |
44 | FTRACE_TYPE_RETURN, /* Hook the return of the function */ | |
45 | }; | |
46 | ||
47 | /* Current tracing type, default is FTRACE_TYPE_ENTER */ | |
48 | extern enum ftrace_tracing_type_t ftrace_tracing_type; | |
49 | ||
60a7ecf4 SR |
50 | /** |
51 | * ftrace_stop - stop function tracer. | |
52 | * | |
53 | * A quick way to stop the function tracer. Note this an on off switch, | |
54 | * it is not something that is recursive like preempt_disable. | |
55 | * This does not disable the calling of mcount, it only stops the | |
56 | * calling of functions from mcount. | |
57 | */ | |
58 | static inline void ftrace_stop(void) | |
59 | { | |
60 | function_trace_stop = 1; | |
61 | } | |
62 | ||
63 | /** | |
64 | * ftrace_start - start the function tracer. | |
65 | * | |
66 | * This function is the inverse of ftrace_stop. This does not enable | |
67 | * the function tracing if the function tracer is disabled. This only | |
68 | * sets the function tracer flag to continue calling the functions | |
69 | * from mcount. | |
70 | */ | |
71 | static inline void ftrace_start(void) | |
72 | { | |
73 | function_trace_stop = 0; | |
74 | } | |
75 | ||
16444a8a ACM |
76 | /* |
77 | * The ftrace_ops must be a static and should also | |
78 | * be read_mostly. These functions do modify read_mostly variables | |
79 | * so use them sparely. Never free an ftrace_op or modify the | |
80 | * next pointer after it has been registered. Even after unregistering | |
81 | * it, the next pointer may still be used internally. | |
82 | */ | |
83 | int register_ftrace_function(struct ftrace_ops *ops); | |
84 | int unregister_ftrace_function(struct ftrace_ops *ops); | |
85 | void clear_ftrace_function(void); | |
86 | ||
87 | extern void ftrace_stub(unsigned long a0, unsigned long a1); | |
16444a8a | 88 | |
606576ce | 89 | #else /* !CONFIG_FUNCTION_TRACER */ |
4dbf6bc2 SR |
90 | /* |
91 | * (un)register_ftrace_function must be a macro since the ops parameter | |
92 | * must not be evaluated. | |
93 | */ | |
94 | #define register_ftrace_function(ops) ({ 0; }) | |
95 | #define unregister_ftrace_function(ops) ({ 0; }) | |
96 | static inline void clear_ftrace_function(void) { } | |
81adbdc0 | 97 | static inline void ftrace_kill(void) { } |
60a7ecf4 SR |
98 | static inline void ftrace_stop(void) { } |
99 | static inline void ftrace_start(void) { } | |
606576ce | 100 | #endif /* CONFIG_FUNCTION_TRACER */ |
352ad25a | 101 | |
f38f1d2a SR |
102 | #ifdef CONFIG_STACK_TRACER |
103 | extern int stack_tracer_enabled; | |
104 | int | |
105 | stack_trace_sysctl(struct ctl_table *table, int write, | |
8d65af78 | 106 | void __user *buffer, size_t *lenp, |
f38f1d2a SR |
107 | loff_t *ppos); |
108 | #endif | |
109 | ||
f6180773 SR |
110 | struct ftrace_func_command { |
111 | struct list_head list; | |
112 | char *name; | |
113 | int (*func)(char *func, char *cmd, | |
114 | char *params, int enable); | |
115 | }; | |
116 | ||
3d083395 | 117 | #ifdef CONFIG_DYNAMIC_FTRACE |
31e88909 | 118 | |
000ab691 SR |
119 | int ftrace_arch_code_modify_prepare(void); |
120 | int ftrace_arch_code_modify_post_process(void); | |
121 | ||
809dcf29 SR |
122 | struct seq_file; |
123 | ||
b6887d79 | 124 | struct ftrace_probe_ops { |
59df055f SR |
125 | void (*func)(unsigned long ip, |
126 | unsigned long parent_ip, | |
127 | void **data); | |
128 | int (*callback)(unsigned long ip, void **data); | |
129 | void (*free)(void **data); | |
809dcf29 SR |
130 | int (*print)(struct seq_file *m, |
131 | unsigned long ip, | |
b6887d79 | 132 | struct ftrace_probe_ops *ops, |
809dcf29 | 133 | void *data); |
59df055f SR |
134 | }; |
135 | ||
136 | extern int | |
b6887d79 | 137 | register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, |
59df055f SR |
138 | void *data); |
139 | extern void | |
b6887d79 | 140 | unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, |
59df055f SR |
141 | void *data); |
142 | extern void | |
b6887d79 SR |
143 | unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops); |
144 | extern void unregister_ftrace_function_probe_all(char *glob); | |
59df055f | 145 | |
2cfa1978 MH |
146 | extern int ftrace_text_reserved(void *start, void *end); |
147 | ||
3c1720f0 | 148 | enum { |
37ad5084 | 149 | FTRACE_FL_FREE = (1 << 0), |
1cf41dd7 | 150 | FTRACE_FL_ENABLED = (1 << 1), |
3c1720f0 SR |
151 | }; |
152 | ||
3d083395 | 153 | struct dyn_ftrace { |
ee000b7f LJ |
154 | union { |
155 | unsigned long ip; /* address of mcount call-site */ | |
156 | struct dyn_ftrace *freelist; | |
157 | }; | |
158 | union { | |
159 | unsigned long flags; | |
160 | struct dyn_ftrace *newlist; | |
161 | }; | |
162 | struct dyn_arch_ftrace arch; | |
3d083395 SR |
163 | }; |
164 | ||
e1c08bdd | 165 | int ftrace_force_update(void); |
77a2b37d | 166 | void ftrace_set_filter(unsigned char *buf, int len, int reset); |
e1c08bdd | 167 | |
f6180773 SR |
168 | int register_ftrace_command(struct ftrace_func_command *cmd); |
169 | int unregister_ftrace_command(struct ftrace_func_command *cmd); | |
170 | ||
3d083395 | 171 | /* defined in arch */ |
3c1720f0 | 172 | extern int ftrace_ip_converted(unsigned long ip); |
d61f82d0 | 173 | extern int ftrace_dyn_arch_init(void *data); |
d61f82d0 SR |
174 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
175 | extern void ftrace_caller(void); | |
176 | extern void ftrace_call(void); | |
177 | extern void mcount_call(void); | |
f0001207 SL |
178 | |
179 | #ifndef FTRACE_ADDR | |
180 | #define FTRACE_ADDR ((unsigned long)ftrace_caller) | |
181 | #endif | |
fb52607a FW |
182 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
183 | extern void ftrace_graph_caller(void); | |
5a45cfe1 SR |
184 | extern int ftrace_enable_ftrace_graph_caller(void); |
185 | extern int ftrace_disable_ftrace_graph_caller(void); | |
186 | #else | |
187 | static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; } | |
188 | static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; } | |
e7d3737e | 189 | #endif |
ad90c0e3 | 190 | |
31e88909 | 191 | /** |
57794a9d | 192 | * ftrace_make_nop - convert code into nop |
31e88909 SR |
193 | * @mod: module structure if called by module load initialization |
194 | * @rec: the mcount call site record | |
195 | * @addr: the address that the call site should be calling | |
196 | * | |
197 | * This is a very sensitive operation and great care needs | |
198 | * to be taken by the arch. The operation should carefully | |
199 | * read the location, check to see if what is read is indeed | |
200 | * what we expect it to be, and then on success of the compare, | |
201 | * it should write to the location. | |
202 | * | |
203 | * The code segment at @rec->ip should be a caller to @addr | |
204 | * | |
205 | * Return must be: | |
206 | * 0 on success | |
207 | * -EFAULT on error reading the location | |
208 | * -EINVAL on a failed compare of the contents | |
209 | * -EPERM on error writing to the location | |
210 | * Any other value will be considered a failure. | |
211 | */ | |
212 | extern int ftrace_make_nop(struct module *mod, | |
213 | struct dyn_ftrace *rec, unsigned long addr); | |
a26a2a27 | 214 | |
593eb8a2 | 215 | /** |
31e88909 SR |
216 | * ftrace_make_call - convert a nop call site into a call to addr |
217 | * @rec: the mcount call site record | |
218 | * @addr: the address that the call site should call | |
593eb8a2 SR |
219 | * |
220 | * This is a very sensitive operation and great care needs | |
221 | * to be taken by the arch. The operation should carefully | |
222 | * read the location, check to see if what is read is indeed | |
223 | * what we expect it to be, and then on success of the compare, | |
224 | * it should write to the location. | |
225 | * | |
31e88909 SR |
226 | * The code segment at @rec->ip should be a nop |
227 | * | |
593eb8a2 SR |
228 | * Return must be: |
229 | * 0 on success | |
230 | * -EFAULT on error reading the location | |
231 | * -EINVAL on a failed compare of the contents | |
232 | * -EPERM on error writing to the location | |
233 | * Any other value will be considered a failure. | |
234 | */ | |
31e88909 SR |
235 | extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr); |
236 | ||
31e88909 SR |
237 | /* May be defined in arch */ |
238 | extern int ftrace_arch_read_dyn_info(char *buf, int size); | |
593eb8a2 | 239 | |
ecea656d AS |
240 | extern int skip_trace(unsigned long ip); |
241 | ||
c0719e5a SR |
242 | extern void ftrace_disable_daemon(void); |
243 | extern void ftrace_enable_daemon(void); | |
e1c08bdd | 244 | #else |
4dbf6bc2 SR |
245 | static inline int skip_trace(unsigned long ip) { return 0; } |
246 | static inline int ftrace_force_update(void) { return 0; } | |
247 | static inline void ftrace_set_filter(unsigned char *buf, int len, int reset) | |
248 | { | |
249 | } | |
250 | static inline void ftrace_disable_daemon(void) { } | |
251 | static inline void ftrace_enable_daemon(void) { } | |
e7247a15 | 252 | static inline void ftrace_release_mod(struct module *mod) {} |
f6180773 SR |
253 | static inline int register_ftrace_command(struct ftrace_func_command *cmd) |
254 | { | |
97d0bb8d | 255 | return -EINVAL; |
f6180773 SR |
256 | } |
257 | static inline int unregister_ftrace_command(char *cmd_name) | |
258 | { | |
97d0bb8d | 259 | return -EINVAL; |
f6180773 | 260 | } |
2cfa1978 MH |
261 | static inline int ftrace_text_reserved(void *start, void *end) |
262 | { | |
263 | return 0; | |
264 | } | |
ecea656d | 265 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
352ad25a | 266 | |
aeaee8a2 IM |
267 | /* totally disable ftrace - can not re-enable after this */ |
268 | void ftrace_kill(void); | |
269 | ||
f43fdad8 IM |
270 | static inline void tracer_disable(void) |
271 | { | |
606576ce | 272 | #ifdef CONFIG_FUNCTION_TRACER |
f43fdad8 IM |
273 | ftrace_enabled = 0; |
274 | #endif | |
275 | } | |
276 | ||
37002735 HY |
277 | /* |
278 | * Ftrace disable/restore without lock. Some synchronization mechanism | |
9bdeb7b5 | 279 | * must be used to prevent ftrace_enabled to be changed between |
37002735 HY |
280 | * disable/restore. |
281 | */ | |
9bdeb7b5 HY |
282 | static inline int __ftrace_enabled_save(void) |
283 | { | |
606576ce | 284 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
285 | int saved_ftrace_enabled = ftrace_enabled; |
286 | ftrace_enabled = 0; | |
287 | return saved_ftrace_enabled; | |
288 | #else | |
289 | return 0; | |
290 | #endif | |
291 | } | |
292 | ||
293 | static inline void __ftrace_enabled_restore(int enabled) | |
294 | { | |
606576ce | 295 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
296 | ftrace_enabled = enabled; |
297 | #endif | |
298 | } | |
299 | ||
c79a61f5 UKK |
300 | #ifndef HAVE_ARCH_CALLER_ADDR |
301 | # ifdef CONFIG_FRAME_POINTER | |
302 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
303 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
304 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
305 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
306 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
307 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
308 | # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) | |
309 | # else | |
310 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
311 | # define CALLER_ADDR1 0UL | |
312 | # define CALLER_ADDR2 0UL | |
313 | # define CALLER_ADDR3 0UL | |
314 | # define CALLER_ADDR4 0UL | |
315 | # define CALLER_ADDR5 0UL | |
316 | # define CALLER_ADDR6 0UL | |
317 | # endif | |
318 | #endif /* ifndef HAVE_ARCH_CALLER_ADDR */ | |
352ad25a | 319 | |
81d68a96 | 320 | #ifdef CONFIG_IRQSOFF_TRACER |
489f1396 IM |
321 | extern void time_hardirqs_on(unsigned long a0, unsigned long a1); |
322 | extern void time_hardirqs_off(unsigned long a0, unsigned long a1); | |
81d68a96 | 323 | #else |
4dbf6bc2 SR |
324 | static inline void time_hardirqs_on(unsigned long a0, unsigned long a1) { } |
325 | static inline void time_hardirqs_off(unsigned long a0, unsigned long a1) { } | |
81d68a96 SR |
326 | #endif |
327 | ||
6cd8a4bb | 328 | #ifdef CONFIG_PREEMPT_TRACER |
489f1396 IM |
329 | extern void trace_preempt_on(unsigned long a0, unsigned long a1); |
330 | extern void trace_preempt_off(unsigned long a0, unsigned long a1); | |
6cd8a4bb | 331 | #else |
4dbf6bc2 SR |
332 | static inline void trace_preempt_on(unsigned long a0, unsigned long a1) { } |
333 | static inline void trace_preempt_off(unsigned long a0, unsigned long a1) { } | |
6cd8a4bb SR |
334 | #endif |
335 | ||
68bf21aa SR |
336 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
337 | extern void ftrace_init(void); | |
338 | #else | |
339 | static inline void ftrace_init(void) { } | |
340 | #endif | |
341 | ||
287b6e68 FW |
342 | /* |
343 | * Structure that defines an entry function trace. | |
344 | */ | |
345 | struct ftrace_graph_ent { | |
346 | unsigned long func; /* Current function */ | |
347 | int depth; | |
348 | }; | |
dd0e545f | 349 | |
caf4b323 FW |
350 | /* |
351 | * Structure that defines a return function trace. | |
352 | */ | |
fb52607a | 353 | struct ftrace_graph_ret { |
caf4b323 FW |
354 | unsigned long func; /* Current function */ |
355 | unsigned long long calltime; | |
356 | unsigned long long rettime; | |
0231022c FW |
357 | /* Number of functions that overran the depth limit for current task */ |
358 | unsigned long overrun; | |
287b6e68 | 359 | int depth; |
caf4b323 FW |
360 | }; |
361 | ||
62b915f1 JO |
362 | /* Type of the callback handlers for tracing function graph*/ |
363 | typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ | |
364 | typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ | |
365 | ||
fb52607a | 366 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
8b96f011 | 367 | |
5ac9f622 | 368 | /* for init task */ |
f876d346 | 369 | #define INIT_FTRACE_GRAPH .ret_stack = NULL, |
5ac9f622 | 370 | |
712406a6 SR |
371 | /* |
372 | * Stack of return addresses for functions | |
373 | * of a thread. | |
374 | * Used in struct thread_info | |
375 | */ | |
376 | struct ftrace_ret_stack { | |
377 | unsigned long ret; | |
378 | unsigned long func; | |
379 | unsigned long long calltime; | |
a2a16d6a | 380 | unsigned long long subtime; |
71e308a2 | 381 | unsigned long fp; |
712406a6 SR |
382 | }; |
383 | ||
384 | /* | |
385 | * Primary handler of a function return. | |
386 | * It relays on ftrace_return_to_handler. | |
387 | * Defined in entry_32/64.S | |
388 | */ | |
389 | extern void return_to_handler(void); | |
390 | ||
391 | extern int | |
71e308a2 SR |
392 | ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth, |
393 | unsigned long frame_pointer); | |
712406a6 | 394 | |
8b96f011 FW |
395 | /* |
396 | * Sometimes we don't want to trace a function with the function | |
397 | * graph tracer but we want them to keep traced by the usual function | |
398 | * tracer if the function graph tracer is not configured. | |
399 | */ | |
400 | #define __notrace_funcgraph notrace | |
401 | ||
bcbc4f20 FW |
402 | /* |
403 | * We want to which function is an entrypoint of a hardirq. | |
404 | * That will help us to put a signal on output. | |
405 | */ | |
406 | #define __irq_entry __attribute__((__section__(".irqentry.text"))) | |
407 | ||
408 | /* Limits of hardirq entrypoints */ | |
409 | extern char __irqentry_text_start[]; | |
410 | extern char __irqentry_text_end[]; | |
411 | ||
f201ae23 FW |
412 | #define FTRACE_RETFUNC_DEPTH 50 |
413 | #define FTRACE_RETSTACK_ALLOC_SIZE 32 | |
287b6e68 FW |
414 | extern int register_ftrace_graph(trace_func_graph_ret_t retfunc, |
415 | trace_func_graph_ent_t entryfunc); | |
416 | ||
14a866c5 SR |
417 | extern void ftrace_graph_stop(void); |
418 | ||
287b6e68 FW |
419 | /* The current handlers in use */ |
420 | extern trace_func_graph_ret_t ftrace_graph_return; | |
421 | extern trace_func_graph_ent_t ftrace_graph_entry; | |
caf4b323 | 422 | |
fb52607a | 423 | extern void unregister_ftrace_graph(void); |
f201ae23 | 424 | |
fb52607a FW |
425 | extern void ftrace_graph_init_task(struct task_struct *t); |
426 | extern void ftrace_graph_exit_task(struct task_struct *t); | |
868baf07 | 427 | extern void ftrace_graph_init_idle_task(struct task_struct *t, int cpu); |
21a8c466 FW |
428 | |
429 | static inline int task_curr_ret_stack(struct task_struct *t) | |
430 | { | |
431 | return t->curr_ret_stack; | |
432 | } | |
380c4b14 FW |
433 | |
434 | static inline void pause_graph_tracing(void) | |
435 | { | |
436 | atomic_inc(¤t->tracing_graph_pause); | |
437 | } | |
438 | ||
439 | static inline void unpause_graph_tracing(void) | |
440 | { | |
441 | atomic_dec(¤t->tracing_graph_pause); | |
442 | } | |
5ac9f622 | 443 | #else /* !CONFIG_FUNCTION_GRAPH_TRACER */ |
8b96f011 FW |
444 | |
445 | #define __notrace_funcgraph | |
bcbc4f20 | 446 | #define __irq_entry |
5ac9f622 | 447 | #define INIT_FTRACE_GRAPH |
8b96f011 | 448 | |
fb52607a FW |
449 | static inline void ftrace_graph_init_task(struct task_struct *t) { } |
450 | static inline void ftrace_graph_exit_task(struct task_struct *t) { } | |
868baf07 | 451 | static inline void ftrace_graph_init_idle_task(struct task_struct *t, int cpu) { } |
21a8c466 | 452 | |
62b915f1 JO |
453 | static inline int register_ftrace_graph(trace_func_graph_ret_t retfunc, |
454 | trace_func_graph_ent_t entryfunc) | |
455 | { | |
456 | return -1; | |
457 | } | |
458 | static inline void unregister_ftrace_graph(void) { } | |
459 | ||
21a8c466 FW |
460 | static inline int task_curr_ret_stack(struct task_struct *tsk) |
461 | { | |
462 | return -1; | |
463 | } | |
380c4b14 FW |
464 | |
465 | static inline void pause_graph_tracing(void) { } | |
466 | static inline void unpause_graph_tracing(void) { } | |
5ac9f622 | 467 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |
caf4b323 | 468 | |
ea4e2bc4 | 469 | #ifdef CONFIG_TRACING |
ea4e2bc4 SR |
470 | |
471 | /* flags for current->trace */ | |
472 | enum { | |
473 | TSK_TRACE_FL_TRACE_BIT = 0, | |
474 | TSK_TRACE_FL_GRAPH_BIT = 1, | |
475 | }; | |
476 | enum { | |
477 | TSK_TRACE_FL_TRACE = 1 << TSK_TRACE_FL_TRACE_BIT, | |
478 | TSK_TRACE_FL_GRAPH = 1 << TSK_TRACE_FL_GRAPH_BIT, | |
479 | }; | |
480 | ||
481 | static inline void set_tsk_trace_trace(struct task_struct *tsk) | |
482 | { | |
483 | set_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
484 | } | |
485 | ||
486 | static inline void clear_tsk_trace_trace(struct task_struct *tsk) | |
487 | { | |
488 | clear_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
489 | } | |
490 | ||
491 | static inline int test_tsk_trace_trace(struct task_struct *tsk) | |
492 | { | |
493 | return tsk->trace & TSK_TRACE_FL_TRACE; | |
494 | } | |
495 | ||
496 | static inline void set_tsk_trace_graph(struct task_struct *tsk) | |
497 | { | |
498 | set_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
499 | } | |
500 | ||
501 | static inline void clear_tsk_trace_graph(struct task_struct *tsk) | |
502 | { | |
503 | clear_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
504 | } | |
505 | ||
506 | static inline int test_tsk_trace_graph(struct task_struct *tsk) | |
507 | { | |
508 | return tsk->trace & TSK_TRACE_FL_GRAPH; | |
509 | } | |
510 | ||
cecbca96 FW |
511 | enum ftrace_dump_mode; |
512 | ||
513 | extern enum ftrace_dump_mode ftrace_dump_on_oops; | |
526211bc | 514 | |
261842b7 SR |
515 | #ifdef CONFIG_PREEMPT |
516 | #define INIT_TRACE_RECURSION .trace_recursion = 0, | |
517 | #endif | |
518 | ||
ea4e2bc4 SR |
519 | #endif /* CONFIG_TRACING */ |
520 | ||
261842b7 SR |
521 | #ifndef INIT_TRACE_RECURSION |
522 | #define INIT_TRACE_RECURSION | |
523 | #endif | |
b1818748 | 524 | |
e7b8e675 MF |
525 | #ifdef CONFIG_FTRACE_SYSCALLS |
526 | ||
527 | unsigned long arch_syscall_addr(int nr); | |
528 | ||
529 | #endif /* CONFIG_FTRACE_SYSCALLS */ | |
530 | ||
16444a8a | 531 | #endif /* _LINUX_FTRACE_H */ |