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Commit | Line | Data |
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60a11774 SR |
1 | /* Include in trace.c */ |
2 | ||
9cc26a26 | 3 | #include <linux/stringify.h> |
60a11774 | 4 | #include <linux/kthread.h> |
c7aafc54 | 5 | #include <linux/delay.h> |
60a11774 | 6 | |
e309b41d | 7 | static inline int trace_valid_entry(struct trace_entry *entry) |
60a11774 SR |
8 | { |
9 | switch (entry->type) { | |
10 | case TRACE_FN: | |
11 | case TRACE_CTX: | |
57422797 | 12 | case TRACE_WAKE: |
06fa75ab | 13 | case TRACE_STACK: |
dd0e545f | 14 | case TRACE_PRINT: |
06fa75ab | 15 | case TRACE_SPECIAL: |
80e5ea45 | 16 | case TRACE_BRANCH: |
7447dce9 FW |
17 | case TRACE_GRAPH_ENT: |
18 | case TRACE_GRAPH_RET: | |
60a11774 SR |
19 | return 1; |
20 | } | |
21 | return 0; | |
22 | } | |
23 | ||
3928a8a2 | 24 | static int trace_test_buffer_cpu(struct trace_array *tr, int cpu) |
60a11774 | 25 | { |
3928a8a2 SR |
26 | struct ring_buffer_event *event; |
27 | struct trace_entry *entry; | |
4b3e3d22 | 28 | unsigned int loops = 0; |
60a11774 | 29 | |
3928a8a2 SR |
30 | while ((event = ring_buffer_consume(tr->buffer, cpu, NULL))) { |
31 | entry = ring_buffer_event_data(event); | |
60a11774 | 32 | |
4b3e3d22 SR |
33 | /* |
34 | * The ring buffer is a size of trace_buf_size, if | |
35 | * we loop more than the size, there's something wrong | |
36 | * with the ring buffer. | |
37 | */ | |
38 | if (loops++ > trace_buf_size) { | |
39 | printk(KERN_CONT ".. bad ring buffer "); | |
40 | goto failed; | |
41 | } | |
3928a8a2 | 42 | if (!trace_valid_entry(entry)) { |
c7aafc54 | 43 | printk(KERN_CONT ".. invalid entry %d ", |
3928a8a2 | 44 | entry->type); |
60a11774 SR |
45 | goto failed; |
46 | } | |
60a11774 | 47 | } |
60a11774 SR |
48 | return 0; |
49 | ||
50 | failed: | |
08bafa0e SR |
51 | /* disable tracing */ |
52 | tracing_disabled = 1; | |
60a11774 SR |
53 | printk(KERN_CONT ".. corrupted trace buffer .. "); |
54 | return -1; | |
55 | } | |
56 | ||
57 | /* | |
58 | * Test the trace buffer to see if all the elements | |
59 | * are still sane. | |
60 | */ | |
61 | static int trace_test_buffer(struct trace_array *tr, unsigned long *count) | |
62 | { | |
30afdcb1 SR |
63 | unsigned long flags, cnt = 0; |
64 | int cpu, ret = 0; | |
60a11774 | 65 | |
30afdcb1 | 66 | /* Don't allow flipping of max traces now */ |
d51ad7ac | 67 | local_irq_save(flags); |
30afdcb1 | 68 | __raw_spin_lock(&ftrace_max_lock); |
60a11774 | 69 | |
3928a8a2 | 70 | cnt = ring_buffer_entries(tr->buffer); |
60a11774 | 71 | |
0c5119c1 SR |
72 | /* |
73 | * The trace_test_buffer_cpu runs a while loop to consume all data. | |
74 | * If the calling tracer is broken, and is constantly filling | |
75 | * the buffer, this will run forever, and hard lock the box. | |
76 | * We disable the ring buffer while we do this test to prevent | |
77 | * a hard lock up. | |
78 | */ | |
79 | tracing_off(); | |
3928a8a2 SR |
80 | for_each_possible_cpu(cpu) { |
81 | ret = trace_test_buffer_cpu(tr, cpu); | |
60a11774 SR |
82 | if (ret) |
83 | break; | |
84 | } | |
0c5119c1 | 85 | tracing_on(); |
30afdcb1 | 86 | __raw_spin_unlock(&ftrace_max_lock); |
d51ad7ac | 87 | local_irq_restore(flags); |
60a11774 SR |
88 | |
89 | if (count) | |
90 | *count = cnt; | |
91 | ||
92 | return ret; | |
93 | } | |
94 | ||
1c80025a FW |
95 | static inline void warn_failed_init_tracer(struct tracer *trace, int init_ret) |
96 | { | |
97 | printk(KERN_WARNING "Failed to init %s tracer, init returned %d\n", | |
98 | trace->name, init_ret); | |
99 | } | |
606576ce | 100 | #ifdef CONFIG_FUNCTION_TRACER |
77a2b37d SR |
101 | |
102 | #ifdef CONFIG_DYNAMIC_FTRACE | |
103 | ||
77a2b37d SR |
104 | /* Test dynamic code modification and ftrace filters */ |
105 | int trace_selftest_startup_dynamic_tracing(struct tracer *trace, | |
106 | struct trace_array *tr, | |
107 | int (*func)(void)) | |
108 | { | |
77a2b37d SR |
109 | int save_ftrace_enabled = ftrace_enabled; |
110 | int save_tracer_enabled = tracer_enabled; | |
dd0e545f | 111 | unsigned long count; |
4e491d14 | 112 | char *func_name; |
dd0e545f | 113 | int ret; |
77a2b37d SR |
114 | |
115 | /* The ftrace test PASSED */ | |
116 | printk(KERN_CONT "PASSED\n"); | |
117 | pr_info("Testing dynamic ftrace: "); | |
118 | ||
119 | /* enable tracing, and record the filter function */ | |
120 | ftrace_enabled = 1; | |
121 | tracer_enabled = 1; | |
122 | ||
123 | /* passed in by parameter to fool gcc from optimizing */ | |
124 | func(); | |
125 | ||
4e491d14 | 126 | /* |
73d8b8bc | 127 | * Some archs *cough*PowerPC*cough* add characters to the |
4e491d14 | 128 | * start of the function names. We simply put a '*' to |
73d8b8bc | 129 | * accommodate them. |
4e491d14 | 130 | */ |
9cc26a26 | 131 | func_name = "*" __stringify(DYN_FTRACE_TEST_NAME); |
4e491d14 | 132 | |
77a2b37d | 133 | /* filter only on our function */ |
4e491d14 | 134 | ftrace_set_filter(func_name, strlen(func_name), 1); |
77a2b37d SR |
135 | |
136 | /* enable tracing */ | |
b6f11df2 | 137 | ret = tracer_init(trace, tr); |
1c80025a FW |
138 | if (ret) { |
139 | warn_failed_init_tracer(trace, ret); | |
140 | goto out; | |
141 | } | |
dd0e545f | 142 | |
77a2b37d SR |
143 | /* Sleep for a 1/10 of a second */ |
144 | msleep(100); | |
145 | ||
146 | /* we should have nothing in the buffer */ | |
147 | ret = trace_test_buffer(tr, &count); | |
148 | if (ret) | |
149 | goto out; | |
150 | ||
151 | if (count) { | |
152 | ret = -1; | |
153 | printk(KERN_CONT ".. filter did not filter .. "); | |
154 | goto out; | |
155 | } | |
156 | ||
157 | /* call our function again */ | |
158 | func(); | |
159 | ||
160 | /* sleep again */ | |
161 | msleep(100); | |
162 | ||
163 | /* stop the tracing. */ | |
bbf5b1a0 | 164 | tracing_stop(); |
77a2b37d SR |
165 | ftrace_enabled = 0; |
166 | ||
167 | /* check the trace buffer */ | |
168 | ret = trace_test_buffer(tr, &count); | |
169 | trace->reset(tr); | |
bbf5b1a0 | 170 | tracing_start(); |
77a2b37d SR |
171 | |
172 | /* we should only have one item */ | |
173 | if (!ret && count != 1) { | |
06fa75ab | 174 | printk(KERN_CONT ".. filter failed count=%ld ..", count); |
77a2b37d SR |
175 | ret = -1; |
176 | goto out; | |
177 | } | |
bbf5b1a0 | 178 | |
77a2b37d SR |
179 | out: |
180 | ftrace_enabled = save_ftrace_enabled; | |
181 | tracer_enabled = save_tracer_enabled; | |
182 | ||
183 | /* Enable tracing on all functions again */ | |
184 | ftrace_set_filter(NULL, 0, 1); | |
185 | ||
186 | return ret; | |
187 | } | |
188 | #else | |
189 | # define trace_selftest_startup_dynamic_tracing(trace, tr, func) ({ 0; }) | |
190 | #endif /* CONFIG_DYNAMIC_FTRACE */ | |
60a11774 SR |
191 | /* |
192 | * Simple verification test of ftrace function tracer. | |
193 | * Enable ftrace, sleep 1/10 second, and then read the trace | |
194 | * buffer to see if all is in order. | |
195 | */ | |
196 | int | |
197 | trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr) | |
198 | { | |
77a2b37d SR |
199 | int save_ftrace_enabled = ftrace_enabled; |
200 | int save_tracer_enabled = tracer_enabled; | |
dd0e545f SR |
201 | unsigned long count; |
202 | int ret; | |
60a11774 | 203 | |
77a2b37d SR |
204 | /* make sure msleep has been recorded */ |
205 | msleep(1); | |
206 | ||
60a11774 | 207 | /* start the tracing */ |
c7aafc54 | 208 | ftrace_enabled = 1; |
77a2b37d | 209 | tracer_enabled = 1; |
c7aafc54 | 210 | |
b6f11df2 | 211 | ret = tracer_init(trace, tr); |
1c80025a FW |
212 | if (ret) { |
213 | warn_failed_init_tracer(trace, ret); | |
214 | goto out; | |
215 | } | |
216 | ||
60a11774 SR |
217 | /* Sleep for a 1/10 of a second */ |
218 | msleep(100); | |
219 | /* stop the tracing. */ | |
bbf5b1a0 | 220 | tracing_stop(); |
c7aafc54 IM |
221 | ftrace_enabled = 0; |
222 | ||
60a11774 SR |
223 | /* check the trace buffer */ |
224 | ret = trace_test_buffer(tr, &count); | |
225 | trace->reset(tr); | |
bbf5b1a0 | 226 | tracing_start(); |
60a11774 SR |
227 | |
228 | if (!ret && !count) { | |
229 | printk(KERN_CONT ".. no entries found .."); | |
230 | ret = -1; | |
77a2b37d | 231 | goto out; |
60a11774 SR |
232 | } |
233 | ||
77a2b37d SR |
234 | ret = trace_selftest_startup_dynamic_tracing(trace, tr, |
235 | DYN_FTRACE_TEST_NAME); | |
236 | ||
237 | out: | |
238 | ftrace_enabled = save_ftrace_enabled; | |
239 | tracer_enabled = save_tracer_enabled; | |
240 | ||
4eebcc81 SR |
241 | /* kill ftrace totally if we failed */ |
242 | if (ret) | |
243 | ftrace_kill(); | |
244 | ||
60a11774 SR |
245 | return ret; |
246 | } | |
606576ce | 247 | #endif /* CONFIG_FUNCTION_TRACER */ |
60a11774 | 248 | |
7447dce9 FW |
249 | |
250 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER | |
251 | /* | |
252 | * Pretty much the same than for the function tracer from which the selftest | |
253 | * has been borrowed. | |
254 | */ | |
255 | int | |
256 | trace_selftest_startup_function_graph(struct tracer *trace, | |
257 | struct trace_array *tr) | |
258 | { | |
259 | int ret; | |
260 | unsigned long count; | |
261 | ||
262 | ret = tracer_init(trace, tr); | |
263 | if (ret) { | |
264 | warn_failed_init_tracer(trace, ret); | |
265 | goto out; | |
266 | } | |
267 | ||
268 | /* Sleep for a 1/10 of a second */ | |
269 | msleep(100); | |
270 | ||
271 | tracing_stop(); | |
272 | ||
273 | /* check the trace buffer */ | |
274 | ret = trace_test_buffer(tr, &count); | |
275 | ||
276 | trace->reset(tr); | |
277 | tracing_start(); | |
278 | ||
279 | if (!ret && !count) { | |
280 | printk(KERN_CONT ".. no entries found .."); | |
281 | ret = -1; | |
282 | goto out; | |
283 | } | |
284 | ||
285 | /* Don't test dynamic tracing, the function tracer already did */ | |
286 | ||
287 | out: | |
288 | /* Stop it if we failed */ | |
289 | if (ret) | |
290 | ftrace_graph_stop(); | |
291 | ||
292 | return ret; | |
293 | } | |
294 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ | |
295 | ||
296 | ||
60a11774 SR |
297 | #ifdef CONFIG_IRQSOFF_TRACER |
298 | int | |
299 | trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr) | |
300 | { | |
301 | unsigned long save_max = tracing_max_latency; | |
302 | unsigned long count; | |
303 | int ret; | |
304 | ||
305 | /* start the tracing */ | |
b6f11df2 | 306 | ret = tracer_init(trace, tr); |
1c80025a FW |
307 | if (ret) { |
308 | warn_failed_init_tracer(trace, ret); | |
309 | return ret; | |
310 | } | |
311 | ||
60a11774 SR |
312 | /* reset the max latency */ |
313 | tracing_max_latency = 0; | |
314 | /* disable interrupts for a bit */ | |
315 | local_irq_disable(); | |
316 | udelay(100); | |
317 | local_irq_enable(); | |
318 | /* stop the tracing. */ | |
bbf5b1a0 | 319 | tracing_stop(); |
60a11774 SR |
320 | /* check both trace buffers */ |
321 | ret = trace_test_buffer(tr, NULL); | |
322 | if (!ret) | |
323 | ret = trace_test_buffer(&max_tr, &count); | |
324 | trace->reset(tr); | |
bbf5b1a0 | 325 | tracing_start(); |
60a11774 SR |
326 | |
327 | if (!ret && !count) { | |
328 | printk(KERN_CONT ".. no entries found .."); | |
329 | ret = -1; | |
330 | } | |
331 | ||
332 | tracing_max_latency = save_max; | |
333 | ||
334 | return ret; | |
335 | } | |
336 | #endif /* CONFIG_IRQSOFF_TRACER */ | |
337 | ||
338 | #ifdef CONFIG_PREEMPT_TRACER | |
339 | int | |
340 | trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr) | |
341 | { | |
342 | unsigned long save_max = tracing_max_latency; | |
343 | unsigned long count; | |
344 | int ret; | |
345 | ||
769c48eb SR |
346 | /* |
347 | * Now that the big kernel lock is no longer preemptable, | |
348 | * and this is called with the BKL held, it will always | |
349 | * fail. If preemption is already disabled, simply | |
350 | * pass the test. When the BKL is removed, or becomes | |
351 | * preemptible again, we will once again test this, | |
352 | * so keep it in. | |
353 | */ | |
354 | if (preempt_count()) { | |
355 | printk(KERN_CONT "can not test ... force "); | |
356 | return 0; | |
357 | } | |
358 | ||
60a11774 | 359 | /* start the tracing */ |
b6f11df2 | 360 | ret = tracer_init(trace, tr); |
1c80025a FW |
361 | if (ret) { |
362 | warn_failed_init_tracer(trace, ret); | |
363 | return ret; | |
364 | } | |
365 | ||
60a11774 SR |
366 | /* reset the max latency */ |
367 | tracing_max_latency = 0; | |
368 | /* disable preemption for a bit */ | |
369 | preempt_disable(); | |
370 | udelay(100); | |
371 | preempt_enable(); | |
372 | /* stop the tracing. */ | |
bbf5b1a0 | 373 | tracing_stop(); |
60a11774 SR |
374 | /* check both trace buffers */ |
375 | ret = trace_test_buffer(tr, NULL); | |
376 | if (!ret) | |
377 | ret = trace_test_buffer(&max_tr, &count); | |
378 | trace->reset(tr); | |
bbf5b1a0 | 379 | tracing_start(); |
60a11774 SR |
380 | |
381 | if (!ret && !count) { | |
382 | printk(KERN_CONT ".. no entries found .."); | |
383 | ret = -1; | |
384 | } | |
385 | ||
386 | tracing_max_latency = save_max; | |
387 | ||
388 | return ret; | |
389 | } | |
390 | #endif /* CONFIG_PREEMPT_TRACER */ | |
391 | ||
392 | #if defined(CONFIG_IRQSOFF_TRACER) && defined(CONFIG_PREEMPT_TRACER) | |
393 | int | |
394 | trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *tr) | |
395 | { | |
396 | unsigned long save_max = tracing_max_latency; | |
397 | unsigned long count; | |
398 | int ret; | |
399 | ||
769c48eb SR |
400 | /* |
401 | * Now that the big kernel lock is no longer preemptable, | |
402 | * and this is called with the BKL held, it will always | |
403 | * fail. If preemption is already disabled, simply | |
404 | * pass the test. When the BKL is removed, or becomes | |
405 | * preemptible again, we will once again test this, | |
406 | * so keep it in. | |
407 | */ | |
408 | if (preempt_count()) { | |
409 | printk(KERN_CONT "can not test ... force "); | |
410 | return 0; | |
411 | } | |
412 | ||
60a11774 | 413 | /* start the tracing */ |
b6f11df2 | 414 | ret = tracer_init(trace, tr); |
1c80025a FW |
415 | if (ret) { |
416 | warn_failed_init_tracer(trace, ret); | |
ac1d52d0 | 417 | goto out_no_start; |
1c80025a | 418 | } |
60a11774 SR |
419 | |
420 | /* reset the max latency */ | |
421 | tracing_max_latency = 0; | |
422 | ||
423 | /* disable preemption and interrupts for a bit */ | |
424 | preempt_disable(); | |
425 | local_irq_disable(); | |
426 | udelay(100); | |
427 | preempt_enable(); | |
428 | /* reverse the order of preempt vs irqs */ | |
429 | local_irq_enable(); | |
430 | ||
431 | /* stop the tracing. */ | |
bbf5b1a0 | 432 | tracing_stop(); |
60a11774 SR |
433 | /* check both trace buffers */ |
434 | ret = trace_test_buffer(tr, NULL); | |
ac1d52d0 | 435 | if (ret) |
60a11774 SR |
436 | goto out; |
437 | ||
438 | ret = trace_test_buffer(&max_tr, &count); | |
ac1d52d0 | 439 | if (ret) |
60a11774 SR |
440 | goto out; |
441 | ||
442 | if (!ret && !count) { | |
443 | printk(KERN_CONT ".. no entries found .."); | |
444 | ret = -1; | |
445 | goto out; | |
446 | } | |
447 | ||
448 | /* do the test by disabling interrupts first this time */ | |
449 | tracing_max_latency = 0; | |
bbf5b1a0 | 450 | tracing_start(); |
60a11774 SR |
451 | preempt_disable(); |
452 | local_irq_disable(); | |
453 | udelay(100); | |
454 | preempt_enable(); | |
455 | /* reverse the order of preempt vs irqs */ | |
456 | local_irq_enable(); | |
457 | ||
458 | /* stop the tracing. */ | |
bbf5b1a0 | 459 | tracing_stop(); |
60a11774 SR |
460 | /* check both trace buffers */ |
461 | ret = trace_test_buffer(tr, NULL); | |
462 | if (ret) | |
463 | goto out; | |
464 | ||
465 | ret = trace_test_buffer(&max_tr, &count); | |
466 | ||
467 | if (!ret && !count) { | |
468 | printk(KERN_CONT ".. no entries found .."); | |
469 | ret = -1; | |
470 | goto out; | |
471 | } | |
472 | ||
ac1d52d0 | 473 | out: |
bbf5b1a0 | 474 | tracing_start(); |
ac1d52d0 FW |
475 | out_no_start: |
476 | trace->reset(tr); | |
60a11774 SR |
477 | tracing_max_latency = save_max; |
478 | ||
479 | return ret; | |
480 | } | |
481 | #endif /* CONFIG_IRQSOFF_TRACER && CONFIG_PREEMPT_TRACER */ | |
482 | ||
fb1b6d8b SN |
483 | #ifdef CONFIG_NOP_TRACER |
484 | int | |
485 | trace_selftest_startup_nop(struct tracer *trace, struct trace_array *tr) | |
486 | { | |
487 | /* What could possibly go wrong? */ | |
488 | return 0; | |
489 | } | |
490 | #endif | |
491 | ||
60a11774 SR |
492 | #ifdef CONFIG_SCHED_TRACER |
493 | static int trace_wakeup_test_thread(void *data) | |
494 | { | |
60a11774 | 495 | /* Make this a RT thread, doesn't need to be too high */ |
05bd68c5 SR |
496 | struct sched_param param = { .sched_priority = 5 }; |
497 | struct completion *x = data; | |
60a11774 | 498 | |
05bd68c5 | 499 | sched_setscheduler(current, SCHED_FIFO, ¶m); |
60a11774 SR |
500 | |
501 | /* Make it know we have a new prio */ | |
502 | complete(x); | |
503 | ||
504 | /* now go to sleep and let the test wake us up */ | |
505 | set_current_state(TASK_INTERRUPTIBLE); | |
506 | schedule(); | |
507 | ||
508 | /* we are awake, now wait to disappear */ | |
509 | while (!kthread_should_stop()) { | |
510 | /* | |
511 | * This is an RT task, do short sleeps to let | |
512 | * others run. | |
513 | */ | |
514 | msleep(100); | |
515 | } | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | int | |
521 | trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr) | |
522 | { | |
523 | unsigned long save_max = tracing_max_latency; | |
524 | struct task_struct *p; | |
525 | struct completion isrt; | |
526 | unsigned long count; | |
527 | int ret; | |
528 | ||
529 | init_completion(&isrt); | |
530 | ||
531 | /* create a high prio thread */ | |
532 | p = kthread_run(trace_wakeup_test_thread, &isrt, "ftrace-test"); | |
c7aafc54 | 533 | if (IS_ERR(p)) { |
60a11774 SR |
534 | printk(KERN_CONT "Failed to create ftrace wakeup test thread "); |
535 | return -1; | |
536 | } | |
537 | ||
538 | /* make sure the thread is running at an RT prio */ | |
539 | wait_for_completion(&isrt); | |
540 | ||
541 | /* start the tracing */ | |
b6f11df2 | 542 | ret = tracer_init(trace, tr); |
1c80025a FW |
543 | if (ret) { |
544 | warn_failed_init_tracer(trace, ret); | |
545 | return ret; | |
546 | } | |
547 | ||
60a11774 SR |
548 | /* reset the max latency */ |
549 | tracing_max_latency = 0; | |
550 | ||
551 | /* sleep to let the RT thread sleep too */ | |
552 | msleep(100); | |
553 | ||
554 | /* | |
555 | * Yes this is slightly racy. It is possible that for some | |
556 | * strange reason that the RT thread we created, did not | |
557 | * call schedule for 100ms after doing the completion, | |
558 | * and we do a wakeup on a task that already is awake. | |
559 | * But that is extremely unlikely, and the worst thing that | |
560 | * happens in such a case, is that we disable tracing. | |
561 | * Honestly, if this race does happen something is horrible | |
562 | * wrong with the system. | |
563 | */ | |
564 | ||
565 | wake_up_process(p); | |
566 | ||
5aa60c60 SR |
567 | /* give a little time to let the thread wake up */ |
568 | msleep(100); | |
569 | ||
60a11774 | 570 | /* stop the tracing. */ |
bbf5b1a0 | 571 | tracing_stop(); |
60a11774 SR |
572 | /* check both trace buffers */ |
573 | ret = trace_test_buffer(tr, NULL); | |
574 | if (!ret) | |
575 | ret = trace_test_buffer(&max_tr, &count); | |
576 | ||
577 | ||
578 | trace->reset(tr); | |
bbf5b1a0 | 579 | tracing_start(); |
60a11774 SR |
580 | |
581 | tracing_max_latency = save_max; | |
582 | ||
583 | /* kill the thread */ | |
584 | kthread_stop(p); | |
585 | ||
586 | if (!ret && !count) { | |
587 | printk(KERN_CONT ".. no entries found .."); | |
588 | ret = -1; | |
589 | } | |
590 | ||
591 | return ret; | |
592 | } | |
593 | #endif /* CONFIG_SCHED_TRACER */ | |
594 | ||
595 | #ifdef CONFIG_CONTEXT_SWITCH_TRACER | |
596 | int | |
597 | trace_selftest_startup_sched_switch(struct tracer *trace, struct trace_array *tr) | |
598 | { | |
599 | unsigned long count; | |
600 | int ret; | |
601 | ||
602 | /* start the tracing */ | |
b6f11df2 | 603 | ret = tracer_init(trace, tr); |
1c80025a FW |
604 | if (ret) { |
605 | warn_failed_init_tracer(trace, ret); | |
606 | return ret; | |
607 | } | |
608 | ||
60a11774 SR |
609 | /* Sleep for a 1/10 of a second */ |
610 | msleep(100); | |
611 | /* stop the tracing. */ | |
bbf5b1a0 | 612 | tracing_stop(); |
60a11774 SR |
613 | /* check the trace buffer */ |
614 | ret = trace_test_buffer(tr, &count); | |
615 | trace->reset(tr); | |
bbf5b1a0 | 616 | tracing_start(); |
60a11774 SR |
617 | |
618 | if (!ret && !count) { | |
619 | printk(KERN_CONT ".. no entries found .."); | |
620 | ret = -1; | |
621 | } | |
622 | ||
623 | return ret; | |
624 | } | |
625 | #endif /* CONFIG_CONTEXT_SWITCH_TRACER */ | |
a6dd24f8 IM |
626 | |
627 | #ifdef CONFIG_SYSPROF_TRACER | |
628 | int | |
629 | trace_selftest_startup_sysprof(struct tracer *trace, struct trace_array *tr) | |
630 | { | |
631 | unsigned long count; | |
632 | int ret; | |
633 | ||
634 | /* start the tracing */ | |
b6f11df2 | 635 | ret = tracer_init(trace, tr); |
1c80025a FW |
636 | if (ret) { |
637 | warn_failed_init_tracer(trace, ret); | |
d2ef7c2f | 638 | return ret; |
1c80025a FW |
639 | } |
640 | ||
a6dd24f8 IM |
641 | /* Sleep for a 1/10 of a second */ |
642 | msleep(100); | |
643 | /* stop the tracing. */ | |
bbf5b1a0 | 644 | tracing_stop(); |
a6dd24f8 IM |
645 | /* check the trace buffer */ |
646 | ret = trace_test_buffer(tr, &count); | |
647 | trace->reset(tr); | |
bbf5b1a0 | 648 | tracing_start(); |
a6dd24f8 | 649 | |
d2ef7c2f WH |
650 | if (!ret && !count) { |
651 | printk(KERN_CONT ".. no entries found .."); | |
652 | ret = -1; | |
653 | } | |
654 | ||
a6dd24f8 IM |
655 | return ret; |
656 | } | |
657 | #endif /* CONFIG_SYSPROF_TRACER */ | |
80e5ea45 SR |
658 | |
659 | #ifdef CONFIG_BRANCH_TRACER | |
660 | int | |
661 | trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr) | |
662 | { | |
663 | unsigned long count; | |
664 | int ret; | |
665 | ||
666 | /* start the tracing */ | |
b6f11df2 | 667 | ret = tracer_init(trace, tr); |
1c80025a FW |
668 | if (ret) { |
669 | warn_failed_init_tracer(trace, ret); | |
670 | return ret; | |
671 | } | |
672 | ||
80e5ea45 SR |
673 | /* Sleep for a 1/10 of a second */ |
674 | msleep(100); | |
675 | /* stop the tracing. */ | |
676 | tracing_stop(); | |
677 | /* check the trace buffer */ | |
678 | ret = trace_test_buffer(tr, &count); | |
679 | trace->reset(tr); | |
680 | tracing_start(); | |
681 | ||
d2ef7c2f WH |
682 | if (!ret && !count) { |
683 | printk(KERN_CONT ".. no entries found .."); | |
684 | ret = -1; | |
685 | } | |
686 | ||
80e5ea45 SR |
687 | return ret; |
688 | } | |
689 | #endif /* CONFIG_BRANCH_TRACER */ |