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1c8284eb MD |
1 | /* |
2 | * ltt/probes/kernel-trace.c | |
3 | * | |
4 | * kernel tracepoint probes. | |
5 | * | |
6 | * (C) Copyright 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | |
7 | * Dual LGPL v2.1/GPL v2 license. | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/irq.h> | |
12 | #include <trace/events/signal.h> | |
13 | #include <trace/irq.h> | |
14 | #include <trace/sched.h> | |
15 | #include <trace/timer.h> | |
16 | #include <trace/kernel.h> | |
17 | #include <trace/fault.h> | |
18 | #include <trace/events/sched.h> | |
19 | ||
20 | #include "../ltt-tracer.h" | |
21 | #include "../ltt-type-serializer.h" | |
22 | ||
23 | /* | |
24 | * This should probably be added to s390. | |
25 | */ | |
26 | #ifdef CONFIG_S390 | |
27 | static struct pt_regs *get_irq_regs(void) | |
28 | { | |
29 | return task_pt_regs(current); | |
30 | } | |
31 | #endif | |
32 | ||
33 | /* | |
34 | * FIXME : | |
35 | * currently, the specialized tracepoint probes cannot call into other marker | |
36 | * probes, such as ftrace enable/disable. Given we want them to be as fast as | |
37 | * possible, it might not be so bad to lose this flexibility. But that means | |
38 | * such probes would have to connect to tracepoints on their own. | |
39 | */ | |
40 | ||
41 | /* kernel_irq_entry specialized tracepoint probe */ | |
42 | ||
43 | void probe_irq_entry(void *_data, unsigned int id, struct pt_regs *regs, | |
44 | struct irqaction *action); | |
45 | ||
46 | DEFINE_MARKER_TP(kernel, irq_entry, irq_entry, probe_irq_entry, | |
47 | "ip %lu handler %p irq_id #2u%u kernel_mode #1u%u"); | |
48 | ||
49 | notrace void probe_irq_entry(void *_data, unsigned int id, struct pt_regs *regs, | |
50 | struct irqaction *action) | |
51 | { | |
52 | struct marker *marker; | |
53 | struct serialize_long_long_short_char data; | |
54 | ||
55 | if (unlikely(!regs)) | |
56 | regs = get_irq_regs(); | |
57 | if (likely(regs)) { | |
58 | data.f1 = instruction_pointer(regs); | |
59 | data.f4 = !user_mode(regs); | |
60 | } else { | |
61 | data.f1 = 0UL; | |
62 | data.f4 = 1; | |
63 | } | |
64 | data.f2 = (unsigned long) (action ? action->handler : NULL); | |
65 | data.f3 = id; | |
66 | ||
67 | marker = &GET_MARKER(kernel, irq_entry); | |
68 | ltt_specialized_trace(marker, marker->single.probe_private, | |
69 | &data, serialize_sizeof(data), sizeof(long)); | |
70 | } | |
71 | ||
72 | void probe_irq_next_handler(void *_data, unsigned int id, struct irqaction *action, | |
73 | irqreturn_t prev_ret); | |
74 | ||
75 | DEFINE_MARKER_TP(kernel, irq_next_handler, irq_next_handler, | |
76 | probe_irq_next_handler, | |
77 | "handler %p prev_ret #1u%u"); | |
78 | ||
79 | notrace void probe_irq_next_handler(void *_data, unsigned int id, struct irqaction *action, | |
80 | irqreturn_t prev_ret) | |
81 | { | |
82 | struct marker *marker; | |
83 | struct serialize_long_char data; | |
84 | ||
85 | data.f1 = (unsigned long) (action ? action->handler : NULL); | |
86 | data.f2 = prev_ret; | |
87 | ||
88 | marker = &GET_MARKER(kernel, irq_next_handler); | |
89 | ltt_specialized_trace(marker, marker->single.probe_private, | |
90 | &data, serialize_sizeof(data), sizeof(long)); | |
91 | } | |
92 | ||
93 | /* kernel_irq_exit specialized tracepoint probe */ | |
94 | ||
95 | void probe_irq_exit(void *_data, irqreturn_t retval); | |
96 | ||
97 | DEFINE_MARKER_TP(kernel, irq_exit, irq_exit, probe_irq_exit, | |
98 | "handled #1u%u"); | |
99 | ||
100 | notrace void probe_irq_exit(void *_data, irqreturn_t retval) | |
101 | { | |
102 | struct marker *marker; | |
103 | unsigned char data; | |
104 | ||
105 | data = IRQ_RETVAL(retval); | |
106 | ||
107 | marker = &GET_MARKER(kernel, irq_exit); | |
108 | ltt_specialized_trace(marker, marker->single.probe_private, | |
109 | &data, sizeof(data), sizeof(data)); | |
110 | } | |
111 | ||
112 | /* kernel_softirq_entry specialized tracepoint probe */ | |
113 | ||
114 | void probe_softirq_entry(void *_data, struct softirq_action *h, | |
115 | struct softirq_action *softirq_vec); | |
116 | ||
117 | DEFINE_MARKER_TP(kernel, softirq_entry, softirq_entry, | |
118 | probe_softirq_entry, "softirq_id #1u%lu"); | |
119 | ||
120 | notrace void probe_softirq_entry(void *_data, struct softirq_action *h, | |
121 | struct softirq_action *softirq_vec) | |
122 | { | |
123 | struct marker *marker; | |
124 | unsigned char data; | |
125 | ||
126 | data = ((unsigned long)h - (unsigned long)softirq_vec) / sizeof(*h); | |
127 | ||
128 | marker = &GET_MARKER(kernel, softirq_entry); | |
129 | ltt_specialized_trace(marker, marker->single.probe_private, | |
130 | &data, sizeof(data), sizeof(data)); | |
131 | } | |
132 | ||
133 | /* kernel_softirq_exit specialized tracepoint probe */ | |
134 | ||
135 | void probe_softirq_exit(void *_data, struct softirq_action *h, | |
136 | struct softirq_action *softirq_vec); | |
137 | ||
138 | DEFINE_MARKER_TP(kernel, softirq_exit, softirq_exit, | |
139 | probe_softirq_exit, "softirq_id #1u%lu"); | |
140 | ||
141 | notrace void probe_softirq_exit(void *_data, struct softirq_action *h, | |
142 | struct softirq_action *softirq_vec) | |
143 | { | |
144 | struct marker *marker; | |
145 | unsigned char data; | |
146 | ||
147 | data = ((unsigned long)h - (unsigned long)softirq_vec) / sizeof(*h); | |
148 | ||
149 | marker = &GET_MARKER(kernel, softirq_exit); | |
150 | ltt_specialized_trace(marker, marker->single.probe_private, | |
151 | &data, sizeof(data), sizeof(data)); | |
152 | } | |
153 | ||
154 | /* kernel_softirq_raise specialized tracepoint probe */ | |
155 | ||
156 | void probe_softirq_raise(void *_data, unsigned int nr); | |
157 | ||
158 | DEFINE_MARKER_TP(kernel, softirq_raise, softirq_raise, | |
159 | probe_softirq_raise, "softirq_id #1u%u"); | |
160 | ||
161 | notrace void probe_softirq_raise(void *_data, unsigned int nr) | |
162 | { | |
163 | struct marker *marker; | |
164 | unsigned char data; | |
165 | ||
166 | data = nr; | |
167 | ||
168 | marker = &GET_MARKER(kernel, softirq_raise); | |
169 | ltt_specialized_trace(marker, marker->single.probe_private, | |
170 | &data, sizeof(data), sizeof(data)); | |
171 | } | |
172 | ||
173 | /* Standard probes */ | |
174 | void probe_irq_tasklet_low_entry(void *_data, struct tasklet_struct *t) | |
175 | { | |
176 | trace_mark_tp(kernel, tasklet_low_entry, irq_tasklet_low_entry, | |
177 | probe_irq_tasklet_low_entry, "func %p data %lu", | |
178 | t->func, t->data); | |
179 | } | |
180 | ||
181 | void probe_irq_tasklet_low_exit(void *_data, struct tasklet_struct *t) | |
182 | { | |
183 | trace_mark_tp(kernel, tasklet_low_exit, irq_tasklet_low_exit, | |
184 | probe_irq_tasklet_low_exit, "func %p data %lu", | |
185 | t->func, t->data); | |
186 | } | |
187 | ||
188 | void probe_irq_tasklet_high_entry(void *_data, struct tasklet_struct *t) | |
189 | { | |
190 | trace_mark_tp(kernel, tasklet_high_entry, irq_tasklet_high_entry, | |
191 | probe_irq_tasklet_high_entry, "func %p data %lu", | |
192 | t->func, t->data); | |
193 | } | |
194 | ||
195 | void probe_irq_tasklet_high_exit(void *_data, struct tasklet_struct *t) | |
196 | { | |
197 | trace_mark_tp(kernel, tasklet_high_exit, irq_tasklet_high_exit, | |
198 | probe_irq_tasklet_high_exit, "func %p data %lu", | |
199 | t->func, t->data); | |
200 | } | |
201 | ||
202 | void probe_sched_kthread_stop(void *_data, struct task_struct *t) | |
203 | { | |
204 | trace_mark_tp(kernel, kthread_stop, sched_kthread_stop, | |
205 | probe_sched_kthread_stop, "pid %d", t->pid); | |
206 | } | |
207 | ||
208 | void probe_sched_kthread_stop_ret(void *_data, int ret) | |
209 | { | |
210 | trace_mark_tp(kernel, kthread_stop_ret, sched_kthread_stop_ret, | |
211 | probe_sched_kthread_stop_ret, "ret %d", ret); | |
212 | } | |
213 | ||
214 | void probe_sched_wait_task(void *_data, struct task_struct *p) | |
215 | { | |
216 | trace_mark_tp(kernel, sched_wait_task, sched_wait_task, | |
217 | probe_sched_wait_task, "pid %d state #2d%ld", | |
218 | p->pid, p->state); | |
219 | } | |
220 | ||
221 | /* kernel_sched_try_wakeup specialized tracepoint probe */ | |
222 | ||
223 | void probe_sched_wakeup(void *_data, struct task_struct *p, int success); | |
224 | ||
225 | DEFINE_MARKER_TP(kernel, sched_try_wakeup, sched_wakeup, | |
226 | probe_sched_wakeup, "pid %d cpu_id %u state #2d%ld"); | |
227 | ||
228 | notrace void probe_sched_wakeup(void *_data, struct task_struct *p, int success) | |
229 | { | |
230 | struct marker *marker; | |
231 | struct serialize_int_int_short data; | |
232 | ||
233 | data.f1 = p->pid; | |
234 | data.f2 = task_cpu(p); | |
235 | data.f3 = p->state; | |
236 | ||
237 | marker = &GET_MARKER(kernel, sched_try_wakeup); | |
238 | ltt_specialized_trace(marker, marker->single.probe_private, | |
239 | &data, serialize_sizeof(data), sizeof(int)); | |
240 | } | |
241 | ||
242 | void probe_sched_wakeup_new(void *_data, struct task_struct *p, int success) | |
243 | { | |
244 | trace_mark_tp(kernel, sched_wakeup_new_task, sched_wakeup_new, | |
245 | probe_sched_wakeup_new, "pid %d state #2d%ld cpu_id %u", | |
246 | p->pid, p->state, task_cpu(p)); | |
247 | } | |
248 | ||
249 | /* kernel_sched_schedule specialized tracepoint probe */ | |
250 | ||
251 | void probe_sched_switch(void *_data, struct task_struct *prev, | |
252 | struct task_struct *next); | |
253 | ||
254 | DEFINE_MARKER_TP(kernel, sched_schedule, sched_switch, probe_sched_switch, | |
255 | "prev_pid %d next_pid %d prev_state #2d%ld"); | |
256 | ||
257 | notrace void probe_sched_switch(void *_data, struct task_struct *prev, | |
258 | struct task_struct *next) | |
259 | { | |
260 | struct marker *marker; | |
261 | struct serialize_int_int_short data; | |
262 | ||
263 | data.f1 = prev->pid; | |
264 | data.f2 = next->pid; | |
265 | data.f3 = prev->state; | |
266 | ||
267 | marker = &GET_MARKER(kernel, sched_schedule); | |
268 | ltt_specialized_trace(marker, marker->single.probe_private, | |
269 | &data, serialize_sizeof(data), sizeof(int)); | |
270 | } | |
271 | ||
272 | void probe_sched_migrate_task(void *_data, struct task_struct *p, int dest_cpu) | |
273 | { | |
274 | trace_mark_tp(kernel, sched_migrate_task, sched_migrate_task, | |
275 | probe_sched_migrate_task, "pid %d state #2d%ld dest_cpu %d", | |
276 | p->pid, p->state, dest_cpu); | |
277 | } | |
278 | ||
279 | void probe_sched_signal_send(void *_data, int sig, struct siginfo *info, struct task_struct *t) | |
280 | { | |
281 | trace_mark_tp(kernel, send_signal, signal_generate, | |
282 | probe_sched_signal_send, "pid %d signal %d", t->pid, sig); | |
283 | } | |
284 | ||
285 | void probe_sched_process_free(void *_data, struct task_struct *p) | |
286 | { | |
287 | trace_mark_tp(kernel, process_free, sched_process_free, | |
288 | probe_sched_process_free, "pid %d", p->pid); | |
289 | } | |
290 | ||
291 | void probe_sched_process_exit(void *_data, struct task_struct *p) | |
292 | { | |
293 | trace_mark_tp(kernel, process_exit, sched_process_exit, | |
294 | probe_sched_process_exit, "pid %d", p->pid); | |
295 | } | |
296 | ||
297 | void probe_sched_process_wait(void *_data, struct pid *pid) | |
298 | { | |
299 | trace_mark_tp(kernel, process_wait, sched_process_wait, | |
300 | probe_sched_process_wait, "pid %d", pid_nr(pid)); | |
301 | } | |
302 | ||
303 | void probe_sched_process_fork(void *_data, struct task_struct *parent, | |
304 | struct task_struct *child) | |
305 | { | |
306 | trace_mark_tp(kernel, process_fork, sched_process_fork, | |
307 | probe_sched_process_fork, | |
308 | "parent_pid %d child_pid %d child_tgid %d", | |
309 | parent->pid, child->pid, child->tgid); | |
310 | } | |
311 | ||
312 | void probe_sched_kthread_create(void *_data, void *fn, int pid) | |
313 | { | |
314 | trace_mark_tp(kernel, kthread_create, sched_kthread_create, | |
315 | probe_sched_kthread_create, | |
316 | "fn %p pid %d", fn, pid); | |
317 | } | |
318 | ||
319 | void probe_timer_itimer_expired(void *_data, struct signal_struct *sig) | |
320 | { | |
321 | trace_mark_tp(kernel, timer_itimer_expired, timer_itimer_expired, | |
322 | probe_timer_itimer_expired, "pid %d", | |
323 | pid_nr(sig->leader_pid)); | |
324 | } | |
325 | ||
326 | void probe_timer_itimer_set(void *_data, int which, struct itimerval *value) | |
327 | { | |
328 | trace_mark_tp(kernel, timer_itimer_set, | |
329 | timer_itimer_set, probe_timer_itimer_set, | |
330 | "which %d interval_sec %ld interval_usec %ld " | |
331 | "value_sec %ld value_usec %ld", | |
332 | which, | |
333 | value->it_interval.tv_sec, | |
334 | value->it_interval.tv_usec, | |
335 | value->it_value.tv_sec, | |
336 | value->it_value.tv_usec); | |
337 | } | |
338 | ||
339 | /* kernel_timer_set specialized tracepoint probe */ | |
340 | ||
341 | void probe_timer_set(void *_data, struct timer_list *timer); | |
342 | ||
343 | DEFINE_MARKER_TP(kernel, timer_set, timer_set, probe_timer_set, | |
344 | "expires %lu function %p data %lu"); | |
345 | ||
346 | notrace void probe_timer_set(void *_data, struct timer_list *timer) | |
347 | { | |
348 | struct marker *marker; | |
349 | struct serialize_long_long_long data; | |
350 | ||
351 | data.f1 = timer->expires; | |
352 | data.f2 = (unsigned long)timer->function; | |
353 | data.f3 = timer->data; | |
354 | ||
355 | marker = &GET_MARKER(kernel, timer_set); | |
356 | ltt_specialized_trace(marker, marker->single.probe_private, | |
357 | &data, serialize_sizeof(data), sizeof(long)); | |
358 | } | |
359 | ||
360 | void probe_timer_update_time(void *_data, struct timespec *_xtime, | |
361 | struct timespec *_wall_to_monotonic) | |
362 | { | |
363 | trace_mark_tp(kernel, timer_update_time, timer_update_time, | |
364 | probe_timer_update_time, | |
365 | "jiffies #8u%llu xtime_sec %ld xtime_nsec %ld " | |
366 | "walltomonotonic_sec %ld walltomonotonic_nsec %ld", | |
367 | (unsigned long long)jiffies_64, _xtime->tv_sec, _xtime->tv_nsec, | |
368 | _wall_to_monotonic->tv_sec, _wall_to_monotonic->tv_nsec); | |
369 | } | |
370 | ||
371 | void probe_timer_timeout(void *_data, struct task_struct *p) | |
372 | { | |
373 | trace_mark_tp(kernel, timer_timeout, timer_timeout, | |
374 | probe_timer_timeout, "pid %d", p->pid); | |
375 | } | |
376 | ||
377 | void probe_kernel_printk(void *_data, unsigned long retaddr) | |
378 | { | |
379 | trace_mark_tp(kernel, printk, kernel_printk, | |
380 | probe_kernel_printk, "ip 0x%lX", retaddr); | |
381 | } | |
382 | ||
383 | void probe_kernel_vprintk(void *_data, unsigned long retaddr, char *buf, int len) | |
384 | { | |
385 | if (len > 0) { | |
386 | unsigned int loglevel; | |
387 | int mark_len; | |
388 | char *mark_buf; | |
389 | char saved_char; | |
390 | ||
391 | if (buf[0] == '<' && buf[1] >= '0' && | |
392 | buf[1] <= '7' && buf[2] == '>') { | |
393 | loglevel = buf[1] - '0'; | |
394 | mark_buf = &buf[3]; | |
395 | mark_len = len - 3; | |
396 | } else { | |
397 | loglevel = default_message_loglevel; | |
398 | mark_buf = buf; | |
399 | mark_len = len; | |
400 | } | |
401 | if (mark_buf[mark_len - 1] == '\n') | |
402 | mark_len--; | |
403 | saved_char = mark_buf[mark_len]; | |
404 | mark_buf[mark_len] = '\0'; | |
405 | trace_mark_tp(kernel, vprintk, kernel_vprintk, | |
406 | probe_kernel_vprintk, | |
407 | "loglevel #1u%u string %s ip 0x%lX", | |
408 | loglevel, mark_buf, retaddr); | |
409 | mark_buf[mark_len] = saved_char; | |
410 | } | |
411 | } | |
412 | ||
413 | #ifdef CONFIG_MODULES | |
414 | void probe_kernel_module_free(void *_data, struct module *mod) | |
415 | { | |
416 | trace_mark_tp(kernel, module_free, kernel_module_free, | |
417 | probe_kernel_module_free, "name %s", mod->name); | |
418 | } | |
419 | ||
420 | void probe_kernel_module_load(void *_data, struct module *mod) | |
421 | { | |
422 | trace_mark_tp(kernel, module_load, kernel_module_load, | |
423 | probe_kernel_module_load, "name %s", mod->name); | |
424 | } | |
425 | #endif | |
426 | ||
427 | void probe_kernel_panic(void *_data, const char *fmt, va_list args) | |
428 | { | |
429 | char info[64]; | |
430 | vsnprintf(info, sizeof(info), fmt, args); | |
431 | trace_mark_tp(kernel, panic, kernel_panic, probe_kernel_panic, | |
432 | "info %s", info); | |
433 | } | |
434 | ||
435 | void probe_kernel_kernel_kexec(void *_data, struct kimage *image) | |
436 | { | |
437 | trace_mark_tp(kernel, kernel_kexec, kernel_kernel_kexec, | |
438 | probe_kernel_kernel_kexec, "image %p", image); | |
439 | } | |
440 | ||
441 | void probe_kernel_crash_kexec(void *_data, struct kimage *image, struct pt_regs *regs) | |
442 | { | |
443 | trace_mark_tp(kernel, crash_kexec, kernel_crash_kexec, | |
444 | probe_kernel_crash_kexec, "image %p ip %p", image, | |
445 | regs ? (void *)instruction_pointer(regs) : NULL); | |
446 | } | |
447 | ||
448 | /* kernel_page_fault_entry specialized tracepoint probe */ | |
449 | ||
450 | void probe_kernel_page_fault_entry(void *_data, struct pt_regs *regs, int trapnr, | |
451 | struct mm_struct *mm, struct vm_area_struct *vma, | |
452 | unsigned long address, int write_access); | |
453 | ||
454 | DEFINE_MARKER_TP(kernel, page_fault_entry, page_fault_entry, | |
455 | probe_kernel_page_fault_entry, | |
456 | "ip #p%lu address #p%lu trap_id #2u%u write_access #1u%u"); | |
457 | ||
458 | notrace void probe_kernel_page_fault_entry(void *_data, struct pt_regs *regs, int trapnr, | |
459 | struct mm_struct *mm, struct vm_area_struct *vma, | |
460 | unsigned long address, int write_access) | |
461 | { | |
462 | struct marker *marker; | |
463 | struct serialize_long_long_short_char data; | |
464 | ||
465 | if (likely(regs)) | |
466 | data.f1 = instruction_pointer(regs); | |
467 | else | |
468 | data.f1 = 0UL; | |
469 | data.f2 = address; | |
470 | data.f3 = (unsigned short)trapnr; | |
471 | data.f4 = (unsigned char)!!write_access; | |
472 | ||
473 | marker = &GET_MARKER(kernel, page_fault_entry); | |
474 | ltt_specialized_trace(marker, marker->single.probe_private, | |
475 | &data, serialize_sizeof(data), sizeof(long)); | |
476 | } | |
477 | ||
478 | /* kernel_page_fault_exit specialized tracepoint probe */ | |
479 | ||
480 | void probe_kernel_page_fault_exit(void *_data, int res); | |
481 | ||
482 | DEFINE_MARKER_TP(kernel, page_fault_exit, page_fault_exit, | |
483 | probe_kernel_page_fault_exit, | |
484 | "res %d"); | |
485 | ||
486 | notrace void probe_kernel_page_fault_exit(void *_data, int res) | |
487 | { | |
488 | struct marker *marker; | |
489 | ||
490 | marker = &GET_MARKER(kernel, page_fault_exit); | |
491 | ltt_specialized_trace(marker, marker->single.probe_private, | |
492 | &res, sizeof(res), sizeof(res)); | |
493 | } | |
494 | ||
495 | /* kernel_page_fault_nosem_entry specialized tracepoint probe */ | |
496 | ||
497 | void probe_kernel_page_fault_nosem_entry(void *_data, struct pt_regs *regs, | |
498 | int trapnr, unsigned long address); | |
499 | ||
500 | DEFINE_MARKER_TP(kernel, page_fault_nosem_entry, page_fault_nosem_entry, | |
501 | probe_kernel_page_fault_nosem_entry, | |
502 | "ip #p%lu address #p%lu trap_id #2u%u"); | |
503 | ||
504 | notrace void probe_kernel_page_fault_nosem_entry(void *_data, struct pt_regs *regs, | |
505 | int trapnr, unsigned long address) | |
506 | { | |
507 | struct marker *marker; | |
508 | struct serialize_long_long_short data; | |
509 | ||
510 | if (likely(regs)) | |
511 | data.f1 = instruction_pointer(regs); | |
512 | else | |
513 | data.f1 = 0UL; | |
514 | data.f2 = address; | |
515 | data.f3 = (unsigned short)trapnr; | |
516 | ||
517 | marker = &GET_MARKER(kernel, page_fault_nosem_entry); | |
518 | ltt_specialized_trace(marker, marker->single.probe_private, | |
519 | &data, serialize_sizeof(data), sizeof(long)); | |
520 | } | |
521 | ||
522 | /* kernel_page_fault_nosem_exit specialized tracepoint probe */ | |
523 | ||
524 | void probe_kernel_page_fault_nosem_exit(void *_data, int res); | |
525 | ||
526 | DEFINE_MARKER_TP(kernel, page_fault_nosem_exit, page_fault_nosem_exit, | |
527 | probe_kernel_page_fault_nosem_exit, | |
528 | MARK_NOARGS); | |
529 | ||
530 | notrace void probe_kernel_page_fault_nosem_exit(void *_data, int res) | |
531 | { | |
532 | struct marker *marker; | |
533 | ||
534 | marker = &GET_MARKER(kernel, page_fault_nosem_exit); | |
535 | ltt_specialized_trace(marker, marker->single.probe_private, | |
536 | NULL, 0, 0); | |
537 | } | |
538 | ||
539 | /* kernel_page_fault_get_user_entry specialized tracepoint probe */ | |
540 | ||
541 | void probe_kernel_page_fault_get_user_entry(void *_data, struct mm_struct *mm, | |
542 | struct vm_area_struct *vma, unsigned long address, int write_access); | |
543 | ||
544 | DEFINE_MARKER_TP(kernel, page_fault_get_user_entry, page_fault_get_user_entry, | |
545 | probe_kernel_page_fault_get_user_entry, | |
546 | "address #p%lu write_access #1u%u"); | |
547 | ||
548 | notrace void probe_kernel_page_fault_get_user_entry(void *_data, struct mm_struct *mm, | |
549 | struct vm_area_struct *vma, unsigned long address, int write_access) | |
550 | { | |
551 | struct marker *marker; | |
552 | struct serialize_long_char data; | |
553 | ||
554 | data.f1 = address; | |
555 | data.f2 = (unsigned char)!!write_access; | |
556 | ||
557 | marker = &GET_MARKER(kernel, page_fault_get_user_entry); | |
558 | ltt_specialized_trace(marker, marker->single.probe_private, | |
559 | &data, serialize_sizeof(data), sizeof(long)); | |
560 | } | |
561 | ||
562 | /* kernel_page_fault_get_user_exit specialized tracepoint probe */ | |
563 | ||
564 | void probe_kernel_page_fault_get_user_exit(void *_data, int res); | |
565 | ||
566 | DEFINE_MARKER_TP(kernel, page_fault_get_user_exit, page_fault_get_user_exit, | |
567 | probe_kernel_page_fault_get_user_exit, | |
568 | "res %d"); | |
569 | ||
570 | notrace void probe_kernel_page_fault_get_user_exit(void *_data, int res) | |
571 | { | |
572 | struct marker *marker; | |
573 | ||
574 | marker = &GET_MARKER(kernel, page_fault_get_user_exit); | |
575 | ltt_specialized_trace(marker, marker->single.probe_private, | |
576 | &res, sizeof(res), sizeof(res)); | |
577 | } | |
578 | ||
579 | MODULE_LICENSE("GPL and additional rights"); | |
580 | MODULE_AUTHOR("Mathieu Desnoyers"); | |
581 | MODULE_DESCRIPTION("kernel Tracepoint Probes"); |