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Commit | Line | Data |
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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 SR |
149 | FTRACE_FL_FREE = (1 << 0), |
150 | FTRACE_FL_FAILED = (1 << 1), | |
151 | FTRACE_FL_FILTER = (1 << 2), | |
152 | FTRACE_FL_ENABLED = (1 << 3), | |
41c52c0d | 153 | FTRACE_FL_NOTRACE = (1 << 4), |
0eb96701 | 154 | FTRACE_FL_CONVERTED = (1 << 5), |
3c1720f0 SR |
155 | }; |
156 | ||
3d083395 | 157 | struct dyn_ftrace { |
ee000b7f LJ |
158 | union { |
159 | unsigned long ip; /* address of mcount call-site */ | |
160 | struct dyn_ftrace *freelist; | |
161 | }; | |
162 | union { | |
163 | unsigned long flags; | |
164 | struct dyn_ftrace *newlist; | |
165 | }; | |
166 | struct dyn_arch_ftrace arch; | |
3d083395 SR |
167 | }; |
168 | ||
e1c08bdd | 169 | int ftrace_force_update(void); |
77a2b37d | 170 | void ftrace_set_filter(unsigned char *buf, int len, int reset); |
e1c08bdd | 171 | |
f6180773 SR |
172 | int register_ftrace_command(struct ftrace_func_command *cmd); |
173 | int unregister_ftrace_command(struct ftrace_func_command *cmd); | |
174 | ||
3d083395 | 175 | /* defined in arch */ |
3c1720f0 | 176 | extern int ftrace_ip_converted(unsigned long ip); |
d61f82d0 | 177 | extern int ftrace_dyn_arch_init(void *data); |
d61f82d0 SR |
178 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
179 | extern void ftrace_caller(void); | |
180 | extern void ftrace_call(void); | |
181 | extern void mcount_call(void); | |
f0001207 SL |
182 | |
183 | #ifndef FTRACE_ADDR | |
184 | #define FTRACE_ADDR ((unsigned long)ftrace_caller) | |
185 | #endif | |
fb52607a FW |
186 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
187 | extern void ftrace_graph_caller(void); | |
5a45cfe1 SR |
188 | extern int ftrace_enable_ftrace_graph_caller(void); |
189 | extern int ftrace_disable_ftrace_graph_caller(void); | |
190 | #else | |
191 | static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; } | |
192 | static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; } | |
e7d3737e | 193 | #endif |
ad90c0e3 | 194 | |
31e88909 | 195 | /** |
57794a9d | 196 | * ftrace_make_nop - convert code into nop |
31e88909 SR |
197 | * @mod: module structure if called by module load initialization |
198 | * @rec: the mcount call site record | |
199 | * @addr: the address that the call site should be calling | |
200 | * | |
201 | * This is a very sensitive operation and great care needs | |
202 | * to be taken by the arch. The operation should carefully | |
203 | * read the location, check to see if what is read is indeed | |
204 | * what we expect it to be, and then on success of the compare, | |
205 | * it should write to the location. | |
206 | * | |
207 | * The code segment at @rec->ip should be a caller to @addr | |
208 | * | |
209 | * Return must be: | |
210 | * 0 on success | |
211 | * -EFAULT on error reading the location | |
212 | * -EINVAL on a failed compare of the contents | |
213 | * -EPERM on error writing to the location | |
214 | * Any other value will be considered a failure. | |
215 | */ | |
216 | extern int ftrace_make_nop(struct module *mod, | |
217 | struct dyn_ftrace *rec, unsigned long addr); | |
a26a2a27 | 218 | |
593eb8a2 | 219 | /** |
31e88909 SR |
220 | * ftrace_make_call - convert a nop call site into a call to addr |
221 | * @rec: the mcount call site record | |
222 | * @addr: the address that the call site should call | |
593eb8a2 SR |
223 | * |
224 | * This is a very sensitive operation and great care needs | |
225 | * to be taken by the arch. The operation should carefully | |
226 | * read the location, check to see if what is read is indeed | |
227 | * what we expect it to be, and then on success of the compare, | |
228 | * it should write to the location. | |
229 | * | |
31e88909 SR |
230 | * The code segment at @rec->ip should be a nop |
231 | * | |
593eb8a2 SR |
232 | * Return must be: |
233 | * 0 on success | |
234 | * -EFAULT on error reading the location | |
235 | * -EINVAL on a failed compare of the contents | |
236 | * -EPERM on error writing to the location | |
237 | * Any other value will be considered a failure. | |
238 | */ | |
31e88909 SR |
239 | extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr); |
240 | ||
31e88909 SR |
241 | /* May be defined in arch */ |
242 | extern int ftrace_arch_read_dyn_info(char *buf, int size); | |
593eb8a2 | 243 | |
ecea656d AS |
244 | extern int skip_trace(unsigned long ip); |
245 | ||
c0719e5a SR |
246 | extern void ftrace_disable_daemon(void); |
247 | extern void ftrace_enable_daemon(void); | |
e1c08bdd | 248 | #else |
4dbf6bc2 SR |
249 | static inline int skip_trace(unsigned long ip) { return 0; } |
250 | static inline int ftrace_force_update(void) { return 0; } | |
251 | static inline void ftrace_set_filter(unsigned char *buf, int len, int reset) | |
252 | { | |
253 | } | |
254 | static inline void ftrace_disable_daemon(void) { } | |
255 | static inline void ftrace_enable_daemon(void) { } | |
e7247a15 | 256 | static inline void ftrace_release_mod(struct module *mod) {} |
f6180773 SR |
257 | static inline int register_ftrace_command(struct ftrace_func_command *cmd) |
258 | { | |
97d0bb8d | 259 | return -EINVAL; |
f6180773 SR |
260 | } |
261 | static inline int unregister_ftrace_command(char *cmd_name) | |
262 | { | |
97d0bb8d | 263 | return -EINVAL; |
f6180773 | 264 | } |
2cfa1978 MH |
265 | static inline int ftrace_text_reserved(void *start, void *end) |
266 | { | |
267 | return 0; | |
268 | } | |
ecea656d | 269 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
352ad25a | 270 | |
aeaee8a2 IM |
271 | /* totally disable ftrace - can not re-enable after this */ |
272 | void ftrace_kill(void); | |
273 | ||
f43fdad8 IM |
274 | static inline void tracer_disable(void) |
275 | { | |
606576ce | 276 | #ifdef CONFIG_FUNCTION_TRACER |
f43fdad8 IM |
277 | ftrace_enabled = 0; |
278 | #endif | |
279 | } | |
280 | ||
37002735 HY |
281 | /* |
282 | * Ftrace disable/restore without lock. Some synchronization mechanism | |
9bdeb7b5 | 283 | * must be used to prevent ftrace_enabled to be changed between |
37002735 HY |
284 | * disable/restore. |
285 | */ | |
9bdeb7b5 HY |
286 | static inline int __ftrace_enabled_save(void) |
287 | { | |
606576ce | 288 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
289 | int saved_ftrace_enabled = ftrace_enabled; |
290 | ftrace_enabled = 0; | |
291 | return saved_ftrace_enabled; | |
292 | #else | |
293 | return 0; | |
294 | #endif | |
295 | } | |
296 | ||
297 | static inline void __ftrace_enabled_restore(int enabled) | |
298 | { | |
606576ce | 299 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
300 | ftrace_enabled = enabled; |
301 | #endif | |
302 | } | |
303 | ||
c79a61f5 UKK |
304 | #ifndef HAVE_ARCH_CALLER_ADDR |
305 | # ifdef CONFIG_FRAME_POINTER | |
306 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
307 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
308 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
309 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
310 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
311 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
312 | # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) | |
313 | # else | |
314 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
315 | # define CALLER_ADDR1 0UL | |
316 | # define CALLER_ADDR2 0UL | |
317 | # define CALLER_ADDR3 0UL | |
318 | # define CALLER_ADDR4 0UL | |
319 | # define CALLER_ADDR5 0UL | |
320 | # define CALLER_ADDR6 0UL | |
321 | # endif | |
322 | #endif /* ifndef HAVE_ARCH_CALLER_ADDR */ | |
352ad25a | 323 | |
81d68a96 | 324 | #ifdef CONFIG_IRQSOFF_TRACER |
489f1396 IM |
325 | extern void time_hardirqs_on(unsigned long a0, unsigned long a1); |
326 | extern void time_hardirqs_off(unsigned long a0, unsigned long a1); | |
81d68a96 | 327 | #else |
4dbf6bc2 SR |
328 | static inline void time_hardirqs_on(unsigned long a0, unsigned long a1) { } |
329 | static inline void time_hardirqs_off(unsigned long a0, unsigned long a1) { } | |
81d68a96 SR |
330 | #endif |
331 | ||
6cd8a4bb | 332 | #ifdef CONFIG_PREEMPT_TRACER |
489f1396 IM |
333 | extern void trace_preempt_on(unsigned long a0, unsigned long a1); |
334 | extern void trace_preempt_off(unsigned long a0, unsigned long a1); | |
6cd8a4bb | 335 | #else |
4dbf6bc2 SR |
336 | static inline void trace_preempt_on(unsigned long a0, unsigned long a1) { } |
337 | static inline void trace_preempt_off(unsigned long a0, unsigned long a1) { } | |
6cd8a4bb SR |
338 | #endif |
339 | ||
68bf21aa SR |
340 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
341 | extern void ftrace_init(void); | |
342 | #else | |
343 | static inline void ftrace_init(void) { } | |
344 | #endif | |
345 | ||
287b6e68 FW |
346 | /* |
347 | * Structure that defines an entry function trace. | |
348 | */ | |
349 | struct ftrace_graph_ent { | |
350 | unsigned long func; /* Current function */ | |
351 | int depth; | |
352 | }; | |
dd0e545f | 353 | |
caf4b323 FW |
354 | /* |
355 | * Structure that defines a return function trace. | |
356 | */ | |
fb52607a | 357 | struct ftrace_graph_ret { |
caf4b323 FW |
358 | unsigned long func; /* Current function */ |
359 | unsigned long long calltime; | |
360 | unsigned long long rettime; | |
0231022c FW |
361 | /* Number of functions that overran the depth limit for current task */ |
362 | unsigned long overrun; | |
287b6e68 | 363 | int depth; |
caf4b323 FW |
364 | }; |
365 | ||
62b915f1 JO |
366 | /* Type of the callback handlers for tracing function graph*/ |
367 | typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ | |
368 | typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ | |
369 | ||
fb52607a | 370 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
8b96f011 | 371 | |
5ac9f622 | 372 | /* for init task */ |
f876d346 | 373 | #define INIT_FTRACE_GRAPH .ret_stack = NULL, |
5ac9f622 | 374 | |
712406a6 SR |
375 | /* |
376 | * Stack of return addresses for functions | |
377 | * of a thread. | |
378 | * Used in struct thread_info | |
379 | */ | |
380 | struct ftrace_ret_stack { | |
381 | unsigned long ret; | |
382 | unsigned long func; | |
383 | unsigned long long calltime; | |
a2a16d6a | 384 | unsigned long long subtime; |
71e308a2 | 385 | unsigned long fp; |
712406a6 SR |
386 | }; |
387 | ||
388 | /* | |
389 | * Primary handler of a function return. | |
390 | * It relays on ftrace_return_to_handler. | |
391 | * Defined in entry_32/64.S | |
392 | */ | |
393 | extern void return_to_handler(void); | |
394 | ||
395 | extern int | |
71e308a2 SR |
396 | ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth, |
397 | unsigned long frame_pointer); | |
712406a6 | 398 | |
8b96f011 FW |
399 | /* |
400 | * Sometimes we don't want to trace a function with the function | |
401 | * graph tracer but we want them to keep traced by the usual function | |
402 | * tracer if the function graph tracer is not configured. | |
403 | */ | |
404 | #define __notrace_funcgraph notrace | |
405 | ||
bcbc4f20 FW |
406 | /* |
407 | * We want to which function is an entrypoint of a hardirq. | |
408 | * That will help us to put a signal on output. | |
409 | */ | |
410 | #define __irq_entry __attribute__((__section__(".irqentry.text"))) | |
411 | ||
412 | /* Limits of hardirq entrypoints */ | |
413 | extern char __irqentry_text_start[]; | |
414 | extern char __irqentry_text_end[]; | |
415 | ||
f201ae23 FW |
416 | #define FTRACE_RETFUNC_DEPTH 50 |
417 | #define FTRACE_RETSTACK_ALLOC_SIZE 32 | |
287b6e68 FW |
418 | extern int register_ftrace_graph(trace_func_graph_ret_t retfunc, |
419 | trace_func_graph_ent_t entryfunc); | |
420 | ||
14a866c5 SR |
421 | extern void ftrace_graph_stop(void); |
422 | ||
287b6e68 FW |
423 | /* The current handlers in use */ |
424 | extern trace_func_graph_ret_t ftrace_graph_return; | |
425 | extern trace_func_graph_ent_t ftrace_graph_entry; | |
caf4b323 | 426 | |
fb52607a | 427 | extern void unregister_ftrace_graph(void); |
f201ae23 | 428 | |
fb52607a FW |
429 | extern void ftrace_graph_init_task(struct task_struct *t); |
430 | extern void ftrace_graph_exit_task(struct task_struct *t); | |
21a8c466 FW |
431 | |
432 | static inline int task_curr_ret_stack(struct task_struct *t) | |
433 | { | |
434 | return t->curr_ret_stack; | |
435 | } | |
380c4b14 FW |
436 | |
437 | static inline void pause_graph_tracing(void) | |
438 | { | |
439 | atomic_inc(¤t->tracing_graph_pause); | |
440 | } | |
441 | ||
442 | static inline void unpause_graph_tracing(void) | |
443 | { | |
444 | atomic_dec(¤t->tracing_graph_pause); | |
445 | } | |
5ac9f622 | 446 | #else /* !CONFIG_FUNCTION_GRAPH_TRACER */ |
8b96f011 FW |
447 | |
448 | #define __notrace_funcgraph | |
bcbc4f20 | 449 | #define __irq_entry |
5ac9f622 | 450 | #define INIT_FTRACE_GRAPH |
8b96f011 | 451 | |
fb52607a FW |
452 | static inline void ftrace_graph_init_task(struct task_struct *t) { } |
453 | static inline void ftrace_graph_exit_task(struct task_struct *t) { } | |
21a8c466 | 454 | |
62b915f1 JO |
455 | static inline int register_ftrace_graph(trace_func_graph_ret_t retfunc, |
456 | trace_func_graph_ent_t entryfunc) | |
457 | { | |
458 | return -1; | |
459 | } | |
460 | static inline void unregister_ftrace_graph(void) { } | |
461 | ||
21a8c466 FW |
462 | static inline int task_curr_ret_stack(struct task_struct *tsk) |
463 | { | |
464 | return -1; | |
465 | } | |
380c4b14 FW |
466 | |
467 | static inline void pause_graph_tracing(void) { } | |
468 | static inline void unpause_graph_tracing(void) { } | |
5ac9f622 | 469 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |
caf4b323 | 470 | |
ea4e2bc4 | 471 | #ifdef CONFIG_TRACING |
ea4e2bc4 SR |
472 | |
473 | /* flags for current->trace */ | |
474 | enum { | |
475 | TSK_TRACE_FL_TRACE_BIT = 0, | |
476 | TSK_TRACE_FL_GRAPH_BIT = 1, | |
477 | }; | |
478 | enum { | |
479 | TSK_TRACE_FL_TRACE = 1 << TSK_TRACE_FL_TRACE_BIT, | |
480 | TSK_TRACE_FL_GRAPH = 1 << TSK_TRACE_FL_GRAPH_BIT, | |
481 | }; | |
482 | ||
483 | static inline void set_tsk_trace_trace(struct task_struct *tsk) | |
484 | { | |
485 | set_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
486 | } | |
487 | ||
488 | static inline void clear_tsk_trace_trace(struct task_struct *tsk) | |
489 | { | |
490 | clear_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
491 | } | |
492 | ||
493 | static inline int test_tsk_trace_trace(struct task_struct *tsk) | |
494 | { | |
495 | return tsk->trace & TSK_TRACE_FL_TRACE; | |
496 | } | |
497 | ||
498 | static inline void set_tsk_trace_graph(struct task_struct *tsk) | |
499 | { | |
500 | set_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
501 | } | |
502 | ||
503 | static inline void clear_tsk_trace_graph(struct task_struct *tsk) | |
504 | { | |
505 | clear_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
506 | } | |
507 | ||
508 | static inline int test_tsk_trace_graph(struct task_struct *tsk) | |
509 | { | |
510 | return tsk->trace & TSK_TRACE_FL_GRAPH; | |
511 | } | |
512 | ||
cecbca96 FW |
513 | enum ftrace_dump_mode; |
514 | ||
515 | extern enum ftrace_dump_mode ftrace_dump_on_oops; | |
526211bc | 516 | |
261842b7 SR |
517 | #ifdef CONFIG_PREEMPT |
518 | #define INIT_TRACE_RECURSION .trace_recursion = 0, | |
519 | #endif | |
520 | ||
ea4e2bc4 SR |
521 | #endif /* CONFIG_TRACING */ |
522 | ||
261842b7 SR |
523 | #ifndef INIT_TRACE_RECURSION |
524 | #define INIT_TRACE_RECURSION | |
525 | #endif | |
b1818748 | 526 | |
e7b8e675 MF |
527 | #ifdef CONFIG_FTRACE_SYSCALLS |
528 | ||
529 | unsigned long arch_syscall_addr(int nr); | |
530 | ||
531 | #endif /* CONFIG_FTRACE_SYSCALLS */ | |
532 | ||
16444a8a | 533 | #endif /* _LINUX_FTRACE_H */ |