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 | ||
f45948e8 SR |
32 | struct ftrace_hash; |
33 | ||
b848914c SR |
34 | enum { |
35 | FTRACE_OPS_FL_ENABLED = 1 << 0, | |
36 | FTRACE_OPS_FL_GLOBAL = 1 << 1, | |
cdbe61bf | 37 | FTRACE_OPS_FL_DYNAMIC = 1 << 2, |
b848914c SR |
38 | }; |
39 | ||
16444a8a | 40 | struct ftrace_ops { |
f45948e8 SR |
41 | ftrace_func_t func; |
42 | struct ftrace_ops *next; | |
b848914c | 43 | unsigned long flags; |
f45948e8 SR |
44 | #ifdef CONFIG_DYNAMIC_FTRACE |
45 | struct ftrace_hash *notrace_hash; | |
46 | struct ftrace_hash *filter_hash; | |
47 | #endif | |
16444a8a ACM |
48 | }; |
49 | ||
60a7ecf4 SR |
50 | extern int function_trace_stop; |
51 | ||
e7d3737e FW |
52 | /* |
53 | * Type of the current tracing. | |
54 | */ | |
55 | enum ftrace_tracing_type_t { | |
56 | FTRACE_TYPE_ENTER = 0, /* Hook the call of the function */ | |
57 | FTRACE_TYPE_RETURN, /* Hook the return of the function */ | |
58 | }; | |
59 | ||
60 | /* Current tracing type, default is FTRACE_TYPE_ENTER */ | |
61 | extern enum ftrace_tracing_type_t ftrace_tracing_type; | |
62 | ||
60a7ecf4 SR |
63 | /** |
64 | * ftrace_stop - stop function tracer. | |
65 | * | |
66 | * A quick way to stop the function tracer. Note this an on off switch, | |
67 | * it is not something that is recursive like preempt_disable. | |
68 | * This does not disable the calling of mcount, it only stops the | |
69 | * calling of functions from mcount. | |
70 | */ | |
71 | static inline void ftrace_stop(void) | |
72 | { | |
73 | function_trace_stop = 1; | |
74 | } | |
75 | ||
76 | /** | |
77 | * ftrace_start - start the function tracer. | |
78 | * | |
79 | * This function is the inverse of ftrace_stop. This does not enable | |
80 | * the function tracing if the function tracer is disabled. This only | |
81 | * sets the function tracer flag to continue calling the functions | |
82 | * from mcount. | |
83 | */ | |
84 | static inline void ftrace_start(void) | |
85 | { | |
86 | function_trace_stop = 0; | |
87 | } | |
88 | ||
16444a8a ACM |
89 | /* |
90 | * The ftrace_ops must be a static and should also | |
91 | * be read_mostly. These functions do modify read_mostly variables | |
92 | * so use them sparely. Never free an ftrace_op or modify the | |
93 | * next pointer after it has been registered. Even after unregistering | |
94 | * it, the next pointer may still be used internally. | |
95 | */ | |
96 | int register_ftrace_function(struct ftrace_ops *ops); | |
97 | int unregister_ftrace_function(struct ftrace_ops *ops); | |
98 | void clear_ftrace_function(void); | |
99 | ||
100 | extern void ftrace_stub(unsigned long a0, unsigned long a1); | |
16444a8a | 101 | |
606576ce | 102 | #else /* !CONFIG_FUNCTION_TRACER */ |
4dbf6bc2 SR |
103 | /* |
104 | * (un)register_ftrace_function must be a macro since the ops parameter | |
105 | * must not be evaluated. | |
106 | */ | |
107 | #define register_ftrace_function(ops) ({ 0; }) | |
108 | #define unregister_ftrace_function(ops) ({ 0; }) | |
109 | static inline void clear_ftrace_function(void) { } | |
81adbdc0 | 110 | static inline void ftrace_kill(void) { } |
60a7ecf4 SR |
111 | static inline void ftrace_stop(void) { } |
112 | static inline void ftrace_start(void) { } | |
606576ce | 113 | #endif /* CONFIG_FUNCTION_TRACER */ |
352ad25a | 114 | |
f38f1d2a SR |
115 | #ifdef CONFIG_STACK_TRACER |
116 | extern int stack_tracer_enabled; | |
117 | int | |
118 | stack_trace_sysctl(struct ctl_table *table, int write, | |
8d65af78 | 119 | void __user *buffer, size_t *lenp, |
f38f1d2a SR |
120 | loff_t *ppos); |
121 | #endif | |
122 | ||
f6180773 SR |
123 | struct ftrace_func_command { |
124 | struct list_head list; | |
125 | char *name; | |
126 | int (*func)(char *func, char *cmd, | |
127 | char *params, int enable); | |
128 | }; | |
129 | ||
3d083395 | 130 | #ifdef CONFIG_DYNAMIC_FTRACE |
31e88909 | 131 | |
000ab691 SR |
132 | int ftrace_arch_code_modify_prepare(void); |
133 | int ftrace_arch_code_modify_post_process(void); | |
134 | ||
809dcf29 SR |
135 | struct seq_file; |
136 | ||
b6887d79 | 137 | struct ftrace_probe_ops { |
59df055f SR |
138 | void (*func)(unsigned long ip, |
139 | unsigned long parent_ip, | |
140 | void **data); | |
141 | int (*callback)(unsigned long ip, void **data); | |
142 | void (*free)(void **data); | |
809dcf29 SR |
143 | int (*print)(struct seq_file *m, |
144 | unsigned long ip, | |
b6887d79 | 145 | struct ftrace_probe_ops *ops, |
809dcf29 | 146 | void *data); |
59df055f SR |
147 | }; |
148 | ||
149 | extern int | |
b6887d79 | 150 | register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, |
59df055f SR |
151 | void *data); |
152 | extern void | |
b6887d79 | 153 | unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, |
59df055f SR |
154 | void *data); |
155 | extern void | |
b6887d79 SR |
156 | unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops); |
157 | extern void unregister_ftrace_function_probe_all(char *glob); | |
59df055f | 158 | |
2cfa1978 MH |
159 | extern int ftrace_text_reserved(void *start, void *end); |
160 | ||
3c1720f0 | 161 | enum { |
ed926f9b SR |
162 | FTRACE_FL_ENABLED = (1 << 30), |
163 | FTRACE_FL_FREE = (1 << 31), | |
3c1720f0 SR |
164 | }; |
165 | ||
ed926f9b SR |
166 | #define FTRACE_FL_MASK (0x3UL << 30) |
167 | #define FTRACE_REF_MAX ((1 << 30) - 1) | |
168 | ||
3d083395 | 169 | struct dyn_ftrace { |
ee000b7f LJ |
170 | union { |
171 | unsigned long ip; /* address of mcount call-site */ | |
172 | struct dyn_ftrace *freelist; | |
173 | }; | |
174 | union { | |
175 | unsigned long flags; | |
176 | struct dyn_ftrace *newlist; | |
177 | }; | |
178 | struct dyn_arch_ftrace arch; | |
3d083395 SR |
179 | }; |
180 | ||
e1c08bdd | 181 | int ftrace_force_update(void); |
936e074b SR |
182 | void ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf, |
183 | int len, int reset); | |
184 | void ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf, | |
185 | int len, int reset); | |
186 | void ftrace_set_global_filter(unsigned char *buf, int len, int reset); | |
187 | void ftrace_set_global_notrace(unsigned char *buf, int len, int reset); | |
e1c08bdd | 188 | |
f6180773 SR |
189 | int register_ftrace_command(struct ftrace_func_command *cmd); |
190 | int unregister_ftrace_command(struct ftrace_func_command *cmd); | |
191 | ||
3d083395 | 192 | /* defined in arch */ |
3c1720f0 | 193 | extern int ftrace_ip_converted(unsigned long ip); |
d61f82d0 | 194 | extern int ftrace_dyn_arch_init(void *data); |
d61f82d0 SR |
195 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
196 | extern void ftrace_caller(void); | |
197 | extern void ftrace_call(void); | |
198 | extern void mcount_call(void); | |
f0001207 SL |
199 | |
200 | #ifndef FTRACE_ADDR | |
201 | #define FTRACE_ADDR ((unsigned long)ftrace_caller) | |
202 | #endif | |
fb52607a FW |
203 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
204 | extern void ftrace_graph_caller(void); | |
5a45cfe1 SR |
205 | extern int ftrace_enable_ftrace_graph_caller(void); |
206 | extern int ftrace_disable_ftrace_graph_caller(void); | |
207 | #else | |
208 | static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; } | |
209 | static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; } | |
e7d3737e | 210 | #endif |
ad90c0e3 | 211 | |
31e88909 | 212 | /** |
57794a9d | 213 | * ftrace_make_nop - convert code into nop |
31e88909 SR |
214 | * @mod: module structure if called by module load initialization |
215 | * @rec: the mcount call site record | |
216 | * @addr: the address that the call site should be calling | |
217 | * | |
218 | * This is a very sensitive operation and great care needs | |
219 | * to be taken by the arch. The operation should carefully | |
220 | * read the location, check to see if what is read is indeed | |
221 | * what we expect it to be, and then on success of the compare, | |
222 | * it should write to the location. | |
223 | * | |
224 | * The code segment at @rec->ip should be a caller to @addr | |
225 | * | |
226 | * Return must be: | |
227 | * 0 on success | |
228 | * -EFAULT on error reading the location | |
229 | * -EINVAL on a failed compare of the contents | |
230 | * -EPERM on error writing to the location | |
231 | * Any other value will be considered a failure. | |
232 | */ | |
233 | extern int ftrace_make_nop(struct module *mod, | |
234 | struct dyn_ftrace *rec, unsigned long addr); | |
a26a2a27 | 235 | |
593eb8a2 | 236 | /** |
31e88909 SR |
237 | * ftrace_make_call - convert a nop call site into a call to addr |
238 | * @rec: the mcount call site record | |
239 | * @addr: the address that the call site should call | |
593eb8a2 SR |
240 | * |
241 | * This is a very sensitive operation and great care needs | |
242 | * to be taken by the arch. The operation should carefully | |
243 | * read the location, check to see if what is read is indeed | |
244 | * what we expect it to be, and then on success of the compare, | |
245 | * it should write to the location. | |
246 | * | |
31e88909 SR |
247 | * The code segment at @rec->ip should be a nop |
248 | * | |
593eb8a2 SR |
249 | * Return must be: |
250 | * 0 on success | |
251 | * -EFAULT on error reading the location | |
252 | * -EINVAL on a failed compare of the contents | |
253 | * -EPERM on error writing to the location | |
254 | * Any other value will be considered a failure. | |
255 | */ | |
31e88909 SR |
256 | extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr); |
257 | ||
31e88909 SR |
258 | /* May be defined in arch */ |
259 | extern int ftrace_arch_read_dyn_info(char *buf, int size); | |
593eb8a2 | 260 | |
ecea656d AS |
261 | extern int skip_trace(unsigned long ip); |
262 | ||
c0719e5a SR |
263 | extern void ftrace_disable_daemon(void); |
264 | extern void ftrace_enable_daemon(void); | |
e1c08bdd | 265 | #else |
4dbf6bc2 SR |
266 | static inline int skip_trace(unsigned long ip) { return 0; } |
267 | static inline int ftrace_force_update(void) { return 0; } | |
268 | static inline void ftrace_set_filter(unsigned char *buf, int len, int reset) | |
269 | { | |
270 | } | |
271 | static inline void ftrace_disable_daemon(void) { } | |
272 | static inline void ftrace_enable_daemon(void) { } | |
e7247a15 | 273 | static inline void ftrace_release_mod(struct module *mod) {} |
f6180773 SR |
274 | static inline int register_ftrace_command(struct ftrace_func_command *cmd) |
275 | { | |
97d0bb8d | 276 | return -EINVAL; |
f6180773 SR |
277 | } |
278 | static inline int unregister_ftrace_command(char *cmd_name) | |
279 | { | |
97d0bb8d | 280 | return -EINVAL; |
f6180773 | 281 | } |
2cfa1978 MH |
282 | static inline int ftrace_text_reserved(void *start, void *end) |
283 | { | |
284 | return 0; | |
285 | } | |
ecea656d | 286 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
352ad25a | 287 | |
aeaee8a2 IM |
288 | /* totally disable ftrace - can not re-enable after this */ |
289 | void ftrace_kill(void); | |
290 | ||
f43fdad8 IM |
291 | static inline void tracer_disable(void) |
292 | { | |
606576ce | 293 | #ifdef CONFIG_FUNCTION_TRACER |
f43fdad8 IM |
294 | ftrace_enabled = 0; |
295 | #endif | |
296 | } | |
297 | ||
37002735 HY |
298 | /* |
299 | * Ftrace disable/restore without lock. Some synchronization mechanism | |
9bdeb7b5 | 300 | * must be used to prevent ftrace_enabled to be changed between |
37002735 HY |
301 | * disable/restore. |
302 | */ | |
9bdeb7b5 HY |
303 | static inline int __ftrace_enabled_save(void) |
304 | { | |
606576ce | 305 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
306 | int saved_ftrace_enabled = ftrace_enabled; |
307 | ftrace_enabled = 0; | |
308 | return saved_ftrace_enabled; | |
309 | #else | |
310 | return 0; | |
311 | #endif | |
312 | } | |
313 | ||
314 | static inline void __ftrace_enabled_restore(int enabled) | |
315 | { | |
606576ce | 316 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
317 | ftrace_enabled = enabled; |
318 | #endif | |
319 | } | |
320 | ||
c79a61f5 UKK |
321 | #ifndef HAVE_ARCH_CALLER_ADDR |
322 | # ifdef CONFIG_FRAME_POINTER | |
323 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
324 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
325 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
326 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
327 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
328 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
329 | # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) | |
330 | # else | |
331 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
332 | # define CALLER_ADDR1 0UL | |
333 | # define CALLER_ADDR2 0UL | |
334 | # define CALLER_ADDR3 0UL | |
335 | # define CALLER_ADDR4 0UL | |
336 | # define CALLER_ADDR5 0UL | |
337 | # define CALLER_ADDR6 0UL | |
338 | # endif | |
339 | #endif /* ifndef HAVE_ARCH_CALLER_ADDR */ | |
352ad25a | 340 | |
81d68a96 | 341 | #ifdef CONFIG_IRQSOFF_TRACER |
489f1396 IM |
342 | extern void time_hardirqs_on(unsigned long a0, unsigned long a1); |
343 | extern void time_hardirqs_off(unsigned long a0, unsigned long a1); | |
81d68a96 | 344 | #else |
4dbf6bc2 SR |
345 | static inline void time_hardirqs_on(unsigned long a0, unsigned long a1) { } |
346 | static inline void time_hardirqs_off(unsigned long a0, unsigned long a1) { } | |
81d68a96 SR |
347 | #endif |
348 | ||
6cd8a4bb | 349 | #ifdef CONFIG_PREEMPT_TRACER |
489f1396 IM |
350 | extern void trace_preempt_on(unsigned long a0, unsigned long a1); |
351 | extern void trace_preempt_off(unsigned long a0, unsigned long a1); | |
6cd8a4bb | 352 | #else |
4dbf6bc2 SR |
353 | static inline void trace_preempt_on(unsigned long a0, unsigned long a1) { } |
354 | static inline void trace_preempt_off(unsigned long a0, unsigned long a1) { } | |
6cd8a4bb SR |
355 | #endif |
356 | ||
68bf21aa SR |
357 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
358 | extern void ftrace_init(void); | |
359 | #else | |
360 | static inline void ftrace_init(void) { } | |
361 | #endif | |
362 | ||
287b6e68 FW |
363 | /* |
364 | * Structure that defines an entry function trace. | |
365 | */ | |
366 | struct ftrace_graph_ent { | |
367 | unsigned long func; /* Current function */ | |
368 | int depth; | |
369 | }; | |
dd0e545f | 370 | |
caf4b323 FW |
371 | /* |
372 | * Structure that defines a return function trace. | |
373 | */ | |
fb52607a | 374 | struct ftrace_graph_ret { |
caf4b323 FW |
375 | unsigned long func; /* Current function */ |
376 | unsigned long long calltime; | |
377 | unsigned long long rettime; | |
0231022c FW |
378 | /* Number of functions that overran the depth limit for current task */ |
379 | unsigned long overrun; | |
287b6e68 | 380 | int depth; |
caf4b323 FW |
381 | }; |
382 | ||
62b915f1 JO |
383 | /* Type of the callback handlers for tracing function graph*/ |
384 | typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ | |
385 | typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ | |
386 | ||
fb52607a | 387 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
8b96f011 | 388 | |
5ac9f622 | 389 | /* for init task */ |
f876d346 | 390 | #define INIT_FTRACE_GRAPH .ret_stack = NULL, |
5ac9f622 | 391 | |
712406a6 SR |
392 | /* |
393 | * Stack of return addresses for functions | |
394 | * of a thread. | |
395 | * Used in struct thread_info | |
396 | */ | |
397 | struct ftrace_ret_stack { | |
398 | unsigned long ret; | |
399 | unsigned long func; | |
400 | unsigned long long calltime; | |
a2a16d6a | 401 | unsigned long long subtime; |
71e308a2 | 402 | unsigned long fp; |
712406a6 SR |
403 | }; |
404 | ||
405 | /* | |
406 | * Primary handler of a function return. | |
407 | * It relays on ftrace_return_to_handler. | |
408 | * Defined in entry_32/64.S | |
409 | */ | |
410 | extern void return_to_handler(void); | |
411 | ||
412 | extern int | |
71e308a2 SR |
413 | ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth, |
414 | unsigned long frame_pointer); | |
712406a6 | 415 | |
8b96f011 FW |
416 | /* |
417 | * Sometimes we don't want to trace a function with the function | |
418 | * graph tracer but we want them to keep traced by the usual function | |
419 | * tracer if the function graph tracer is not configured. | |
420 | */ | |
421 | #define __notrace_funcgraph notrace | |
422 | ||
bcbc4f20 FW |
423 | /* |
424 | * We want to which function is an entrypoint of a hardirq. | |
425 | * That will help us to put a signal on output. | |
426 | */ | |
427 | #define __irq_entry __attribute__((__section__(".irqentry.text"))) | |
428 | ||
429 | /* Limits of hardirq entrypoints */ | |
430 | extern char __irqentry_text_start[]; | |
431 | extern char __irqentry_text_end[]; | |
432 | ||
f201ae23 FW |
433 | #define FTRACE_RETFUNC_DEPTH 50 |
434 | #define FTRACE_RETSTACK_ALLOC_SIZE 32 | |
287b6e68 FW |
435 | extern int register_ftrace_graph(trace_func_graph_ret_t retfunc, |
436 | trace_func_graph_ent_t entryfunc); | |
437 | ||
14a866c5 SR |
438 | extern void ftrace_graph_stop(void); |
439 | ||
287b6e68 FW |
440 | /* The current handlers in use */ |
441 | extern trace_func_graph_ret_t ftrace_graph_return; | |
442 | extern trace_func_graph_ent_t ftrace_graph_entry; | |
caf4b323 | 443 | |
fb52607a | 444 | extern void unregister_ftrace_graph(void); |
f201ae23 | 445 | |
fb52607a FW |
446 | extern void ftrace_graph_init_task(struct task_struct *t); |
447 | extern void ftrace_graph_exit_task(struct task_struct *t); | |
868baf07 | 448 | extern void ftrace_graph_init_idle_task(struct task_struct *t, int cpu); |
21a8c466 FW |
449 | |
450 | static inline int task_curr_ret_stack(struct task_struct *t) | |
451 | { | |
452 | return t->curr_ret_stack; | |
453 | } | |
380c4b14 FW |
454 | |
455 | static inline void pause_graph_tracing(void) | |
456 | { | |
457 | atomic_inc(¤t->tracing_graph_pause); | |
458 | } | |
459 | ||
460 | static inline void unpause_graph_tracing(void) | |
461 | { | |
462 | atomic_dec(¤t->tracing_graph_pause); | |
463 | } | |
5ac9f622 | 464 | #else /* !CONFIG_FUNCTION_GRAPH_TRACER */ |
8b96f011 FW |
465 | |
466 | #define __notrace_funcgraph | |
bcbc4f20 | 467 | #define __irq_entry |
5ac9f622 | 468 | #define INIT_FTRACE_GRAPH |
8b96f011 | 469 | |
fb52607a FW |
470 | static inline void ftrace_graph_init_task(struct task_struct *t) { } |
471 | static inline void ftrace_graph_exit_task(struct task_struct *t) { } | |
868baf07 | 472 | static inline void ftrace_graph_init_idle_task(struct task_struct *t, int cpu) { } |
21a8c466 | 473 | |
62b915f1 JO |
474 | static inline int register_ftrace_graph(trace_func_graph_ret_t retfunc, |
475 | trace_func_graph_ent_t entryfunc) | |
476 | { | |
477 | return -1; | |
478 | } | |
479 | static inline void unregister_ftrace_graph(void) { } | |
480 | ||
21a8c466 FW |
481 | static inline int task_curr_ret_stack(struct task_struct *tsk) |
482 | { | |
483 | return -1; | |
484 | } | |
380c4b14 FW |
485 | |
486 | static inline void pause_graph_tracing(void) { } | |
487 | static inline void unpause_graph_tracing(void) { } | |
5ac9f622 | 488 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |
caf4b323 | 489 | |
ea4e2bc4 | 490 | #ifdef CONFIG_TRACING |
ea4e2bc4 SR |
491 | |
492 | /* flags for current->trace */ | |
493 | enum { | |
494 | TSK_TRACE_FL_TRACE_BIT = 0, | |
495 | TSK_TRACE_FL_GRAPH_BIT = 1, | |
496 | }; | |
497 | enum { | |
498 | TSK_TRACE_FL_TRACE = 1 << TSK_TRACE_FL_TRACE_BIT, | |
499 | TSK_TRACE_FL_GRAPH = 1 << TSK_TRACE_FL_GRAPH_BIT, | |
500 | }; | |
501 | ||
502 | static inline void set_tsk_trace_trace(struct task_struct *tsk) | |
503 | { | |
504 | set_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
505 | } | |
506 | ||
507 | static inline void clear_tsk_trace_trace(struct task_struct *tsk) | |
508 | { | |
509 | clear_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
510 | } | |
511 | ||
512 | static inline int test_tsk_trace_trace(struct task_struct *tsk) | |
513 | { | |
514 | return tsk->trace & TSK_TRACE_FL_TRACE; | |
515 | } | |
516 | ||
517 | static inline void set_tsk_trace_graph(struct task_struct *tsk) | |
518 | { | |
519 | set_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
520 | } | |
521 | ||
522 | static inline void clear_tsk_trace_graph(struct task_struct *tsk) | |
523 | { | |
524 | clear_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
525 | } | |
526 | ||
527 | static inline int test_tsk_trace_graph(struct task_struct *tsk) | |
528 | { | |
529 | return tsk->trace & TSK_TRACE_FL_GRAPH; | |
530 | } | |
531 | ||
cecbca96 FW |
532 | enum ftrace_dump_mode; |
533 | ||
534 | extern enum ftrace_dump_mode ftrace_dump_on_oops; | |
526211bc | 535 | |
261842b7 SR |
536 | #ifdef CONFIG_PREEMPT |
537 | #define INIT_TRACE_RECURSION .trace_recursion = 0, | |
538 | #endif | |
539 | ||
ea4e2bc4 SR |
540 | #endif /* CONFIG_TRACING */ |
541 | ||
261842b7 SR |
542 | #ifndef INIT_TRACE_RECURSION |
543 | #define INIT_TRACE_RECURSION | |
544 | #endif | |
b1818748 | 545 | |
e7b8e675 MF |
546 | #ifdef CONFIG_FTRACE_SYSCALLS |
547 | ||
548 | unsigned long arch_syscall_addr(int nr); | |
549 | ||
550 | #endif /* CONFIG_FTRACE_SYSCALLS */ | |
551 | ||
16444a8a | 552 | #endif /* _LINUX_FTRACE_H */ |