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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 | ||
46bb0d27 | 114 | void probe_softirq_entry(void *_data, unsigned int vec_nr); |
1c8284eb MD |
115 | |
116 | DEFINE_MARKER_TP(kernel, softirq_entry, softirq_entry, | |
117 | probe_softirq_entry, "softirq_id #1u%lu"); | |
118 | ||
46bb0d27 | 119 | notrace void probe_softirq_entry(void *_data, unsigned int vec_nr) |
1c8284eb MD |
120 | { |
121 | struct marker *marker; | |
122 | unsigned char data; | |
123 | ||
46bb0d27 | 124 | data = vec_nr; |
1c8284eb MD |
125 | |
126 | marker = &GET_MARKER(kernel, softirq_entry); | |
127 | ltt_specialized_trace(marker, marker->single.probe_private, | |
128 | &data, sizeof(data), sizeof(data)); | |
129 | } | |
130 | ||
131 | /* kernel_softirq_exit specialized tracepoint probe */ | |
132 | ||
46bb0d27 | 133 | void probe_softirq_exit(void *_data, unsigned int vec_nr); |
1c8284eb MD |
134 | |
135 | DEFINE_MARKER_TP(kernel, softirq_exit, softirq_exit, | |
136 | probe_softirq_exit, "softirq_id #1u%lu"); | |
137 | ||
46bb0d27 | 138 | notrace void probe_softirq_exit(void *_data, unsigned int vec_nr) |
1c8284eb MD |
139 | { |
140 | struct marker *marker; | |
141 | unsigned char data; | |
142 | ||
46bb0d27 | 143 | data = vec_nr; |
1c8284eb MD |
144 | |
145 | marker = &GET_MARKER(kernel, softirq_exit); | |
146 | ltt_specialized_trace(marker, marker->single.probe_private, | |
147 | &data, sizeof(data), sizeof(data)); | |
148 | } | |
149 | ||
150 | /* kernel_softirq_raise specialized tracepoint probe */ | |
151 | ||
152 | void probe_softirq_raise(void *_data, unsigned int nr); | |
153 | ||
154 | DEFINE_MARKER_TP(kernel, softirq_raise, softirq_raise, | |
155 | probe_softirq_raise, "softirq_id #1u%u"); | |
156 | ||
157 | notrace void probe_softirq_raise(void *_data, unsigned int nr) | |
158 | { | |
159 | struct marker *marker; | |
160 | unsigned char data; | |
161 | ||
162 | data = nr; | |
163 | ||
164 | marker = &GET_MARKER(kernel, softirq_raise); | |
165 | ltt_specialized_trace(marker, marker->single.probe_private, | |
166 | &data, sizeof(data), sizeof(data)); | |
167 | } | |
168 | ||
169 | /* Standard probes */ | |
170 | void probe_irq_tasklet_low_entry(void *_data, struct tasklet_struct *t) | |
171 | { | |
172 | trace_mark_tp(kernel, tasklet_low_entry, irq_tasklet_low_entry, | |
173 | probe_irq_tasklet_low_entry, "func %p data %lu", | |
174 | t->func, t->data); | |
175 | } | |
176 | ||
177 | void probe_irq_tasklet_low_exit(void *_data, struct tasklet_struct *t) | |
178 | { | |
179 | trace_mark_tp(kernel, tasklet_low_exit, irq_tasklet_low_exit, | |
180 | probe_irq_tasklet_low_exit, "func %p data %lu", | |
181 | t->func, t->data); | |
182 | } | |
183 | ||
184 | void probe_irq_tasklet_high_entry(void *_data, struct tasklet_struct *t) | |
185 | { | |
186 | trace_mark_tp(kernel, tasklet_high_entry, irq_tasklet_high_entry, | |
187 | probe_irq_tasklet_high_entry, "func %p data %lu", | |
188 | t->func, t->data); | |
189 | } | |
190 | ||
191 | void probe_irq_tasklet_high_exit(void *_data, struct tasklet_struct *t) | |
192 | { | |
193 | trace_mark_tp(kernel, tasklet_high_exit, irq_tasklet_high_exit, | |
194 | probe_irq_tasklet_high_exit, "func %p data %lu", | |
195 | t->func, t->data); | |
196 | } | |
197 | ||
198 | void probe_sched_kthread_stop(void *_data, struct task_struct *t) | |
199 | { | |
200 | trace_mark_tp(kernel, kthread_stop, sched_kthread_stop, | |
201 | probe_sched_kthread_stop, "pid %d", t->pid); | |
202 | } | |
203 | ||
204 | void probe_sched_kthread_stop_ret(void *_data, int ret) | |
205 | { | |
206 | trace_mark_tp(kernel, kthread_stop_ret, sched_kthread_stop_ret, | |
207 | probe_sched_kthread_stop_ret, "ret %d", ret); | |
208 | } | |
209 | ||
210 | void probe_sched_wait_task(void *_data, struct task_struct *p) | |
211 | { | |
212 | trace_mark_tp(kernel, sched_wait_task, sched_wait_task, | |
213 | probe_sched_wait_task, "pid %d state #2d%ld", | |
214 | p->pid, p->state); | |
215 | } | |
216 | ||
217 | /* kernel_sched_try_wakeup specialized tracepoint probe */ | |
218 | ||
219 | void probe_sched_wakeup(void *_data, struct task_struct *p, int success); | |
220 | ||
221 | DEFINE_MARKER_TP(kernel, sched_try_wakeup, sched_wakeup, | |
222 | probe_sched_wakeup, "pid %d cpu_id %u state #2d%ld"); | |
223 | ||
224 | notrace void probe_sched_wakeup(void *_data, struct task_struct *p, int success) | |
225 | { | |
226 | struct marker *marker; | |
227 | struct serialize_int_int_short data; | |
228 | ||
229 | data.f1 = p->pid; | |
230 | data.f2 = task_cpu(p); | |
231 | data.f3 = p->state; | |
232 | ||
233 | marker = &GET_MARKER(kernel, sched_try_wakeup); | |
234 | ltt_specialized_trace(marker, marker->single.probe_private, | |
235 | &data, serialize_sizeof(data), sizeof(int)); | |
236 | } | |
237 | ||
238 | void probe_sched_wakeup_new(void *_data, struct task_struct *p, int success) | |
239 | { | |
240 | trace_mark_tp(kernel, sched_wakeup_new_task, sched_wakeup_new, | |
241 | probe_sched_wakeup_new, "pid %d state #2d%ld cpu_id %u", | |
242 | p->pid, p->state, task_cpu(p)); | |
243 | } | |
244 | ||
245 | /* kernel_sched_schedule specialized tracepoint probe */ | |
246 | ||
247 | void probe_sched_switch(void *_data, struct task_struct *prev, | |
248 | struct task_struct *next); | |
249 | ||
250 | DEFINE_MARKER_TP(kernel, sched_schedule, sched_switch, probe_sched_switch, | |
251 | "prev_pid %d next_pid %d prev_state #2d%ld"); | |
252 | ||
253 | notrace void probe_sched_switch(void *_data, struct task_struct *prev, | |
254 | struct task_struct *next) | |
255 | { | |
256 | struct marker *marker; | |
257 | struct serialize_int_int_short data; | |
258 | ||
259 | data.f1 = prev->pid; | |
260 | data.f2 = next->pid; | |
261 | data.f3 = prev->state; | |
262 | ||
263 | marker = &GET_MARKER(kernel, sched_schedule); | |
264 | ltt_specialized_trace(marker, marker->single.probe_private, | |
265 | &data, serialize_sizeof(data), sizeof(int)); | |
266 | } | |
267 | ||
268 | void probe_sched_migrate_task(void *_data, struct task_struct *p, int dest_cpu) | |
269 | { | |
270 | trace_mark_tp(kernel, sched_migrate_task, sched_migrate_task, | |
271 | probe_sched_migrate_task, "pid %d state #2d%ld dest_cpu %d", | |
272 | p->pid, p->state, dest_cpu); | |
273 | } | |
274 | ||
275 | void probe_sched_signal_send(void *_data, int sig, struct siginfo *info, struct task_struct *t) | |
276 | { | |
277 | trace_mark_tp(kernel, send_signal, signal_generate, | |
278 | probe_sched_signal_send, "pid %d signal %d", t->pid, sig); | |
279 | } | |
280 | ||
281 | void probe_sched_process_free(void *_data, struct task_struct *p) | |
282 | { | |
283 | trace_mark_tp(kernel, process_free, sched_process_free, | |
284 | probe_sched_process_free, "pid %d", p->pid); | |
285 | } | |
286 | ||
287 | void probe_sched_process_exit(void *_data, struct task_struct *p) | |
288 | { | |
289 | trace_mark_tp(kernel, process_exit, sched_process_exit, | |
290 | probe_sched_process_exit, "pid %d", p->pid); | |
291 | } | |
292 | ||
293 | void probe_sched_process_wait(void *_data, struct pid *pid) | |
294 | { | |
295 | trace_mark_tp(kernel, process_wait, sched_process_wait, | |
296 | probe_sched_process_wait, "pid %d", pid_nr(pid)); | |
297 | } | |
298 | ||
299 | void probe_sched_process_fork(void *_data, struct task_struct *parent, | |
300 | struct task_struct *child) | |
301 | { | |
302 | trace_mark_tp(kernel, process_fork, sched_process_fork, | |
303 | probe_sched_process_fork, | |
304 | "parent_pid %d child_pid %d child_tgid %d", | |
305 | parent->pid, child->pid, child->tgid); | |
306 | } | |
307 | ||
308 | void probe_sched_kthread_create(void *_data, void *fn, int pid) | |
309 | { | |
310 | trace_mark_tp(kernel, kthread_create, sched_kthread_create, | |
311 | probe_sched_kthread_create, | |
312 | "fn %p pid %d", fn, pid); | |
313 | } | |
314 | ||
315 | void probe_timer_itimer_expired(void *_data, struct signal_struct *sig) | |
316 | { | |
317 | trace_mark_tp(kernel, timer_itimer_expired, timer_itimer_expired, | |
318 | probe_timer_itimer_expired, "pid %d", | |
319 | pid_nr(sig->leader_pid)); | |
320 | } | |
321 | ||
322 | void probe_timer_itimer_set(void *_data, int which, struct itimerval *value) | |
323 | { | |
324 | trace_mark_tp(kernel, timer_itimer_set, | |
325 | timer_itimer_set, probe_timer_itimer_set, | |
326 | "which %d interval_sec %ld interval_usec %ld " | |
327 | "value_sec %ld value_usec %ld", | |
328 | which, | |
329 | value->it_interval.tv_sec, | |
330 | value->it_interval.tv_usec, | |
331 | value->it_value.tv_sec, | |
332 | value->it_value.tv_usec); | |
333 | } | |
334 | ||
335 | /* kernel_timer_set specialized tracepoint probe */ | |
336 | ||
337 | void probe_timer_set(void *_data, struct timer_list *timer); | |
338 | ||
339 | DEFINE_MARKER_TP(kernel, timer_set, timer_set, probe_timer_set, | |
340 | "expires %lu function %p data %lu"); | |
341 | ||
342 | notrace void probe_timer_set(void *_data, struct timer_list *timer) | |
343 | { | |
344 | struct marker *marker; | |
345 | struct serialize_long_long_long data; | |
346 | ||
347 | data.f1 = timer->expires; | |
348 | data.f2 = (unsigned long)timer->function; | |
349 | data.f3 = timer->data; | |
350 | ||
351 | marker = &GET_MARKER(kernel, timer_set); | |
352 | ltt_specialized_trace(marker, marker->single.probe_private, | |
353 | &data, serialize_sizeof(data), sizeof(long)); | |
354 | } | |
355 | ||
356 | void probe_timer_update_time(void *_data, struct timespec *_xtime, | |
357 | struct timespec *_wall_to_monotonic) | |
358 | { | |
359 | trace_mark_tp(kernel, timer_update_time, timer_update_time, | |
360 | probe_timer_update_time, | |
361 | "jiffies #8u%llu xtime_sec %ld xtime_nsec %ld " | |
362 | "walltomonotonic_sec %ld walltomonotonic_nsec %ld", | |
363 | (unsigned long long)jiffies_64, _xtime->tv_sec, _xtime->tv_nsec, | |
364 | _wall_to_monotonic->tv_sec, _wall_to_monotonic->tv_nsec); | |
365 | } | |
366 | ||
367 | void probe_timer_timeout(void *_data, struct task_struct *p) | |
368 | { | |
369 | trace_mark_tp(kernel, timer_timeout, timer_timeout, | |
370 | probe_timer_timeout, "pid %d", p->pid); | |
371 | } | |
372 | ||
373 | void probe_kernel_printk(void *_data, unsigned long retaddr) | |
374 | { | |
375 | trace_mark_tp(kernel, printk, kernel_printk, | |
376 | probe_kernel_printk, "ip 0x%lX", retaddr); | |
377 | } | |
378 | ||
379 | void probe_kernel_vprintk(void *_data, unsigned long retaddr, char *buf, int len) | |
380 | { | |
381 | if (len > 0) { | |
382 | unsigned int loglevel; | |
383 | int mark_len; | |
384 | char *mark_buf; | |
385 | char saved_char; | |
386 | ||
387 | if (buf[0] == '<' && buf[1] >= '0' && | |
388 | buf[1] <= '7' && buf[2] == '>') { | |
389 | loglevel = buf[1] - '0'; | |
390 | mark_buf = &buf[3]; | |
391 | mark_len = len - 3; | |
392 | } else { | |
393 | loglevel = default_message_loglevel; | |
394 | mark_buf = buf; | |
395 | mark_len = len; | |
396 | } | |
397 | if (mark_buf[mark_len - 1] == '\n') | |
398 | mark_len--; | |
399 | saved_char = mark_buf[mark_len]; | |
400 | mark_buf[mark_len] = '\0'; | |
401 | trace_mark_tp(kernel, vprintk, kernel_vprintk, | |
402 | probe_kernel_vprintk, | |
403 | "loglevel #1u%u string %s ip 0x%lX", | |
404 | loglevel, mark_buf, retaddr); | |
405 | mark_buf[mark_len] = saved_char; | |
406 | } | |
407 | } | |
408 | ||
409 | #ifdef CONFIG_MODULES | |
410 | void probe_kernel_module_free(void *_data, struct module *mod) | |
411 | { | |
412 | trace_mark_tp(kernel, module_free, kernel_module_free, | |
413 | probe_kernel_module_free, "name %s", mod->name); | |
414 | } | |
415 | ||
416 | void probe_kernel_module_load(void *_data, struct module *mod) | |
417 | { | |
418 | trace_mark_tp(kernel, module_load, kernel_module_load, | |
419 | probe_kernel_module_load, "name %s", mod->name); | |
420 | } | |
421 | #endif | |
422 | ||
423 | void probe_kernel_panic(void *_data, const char *fmt, va_list args) | |
424 | { | |
425 | char info[64]; | |
426 | vsnprintf(info, sizeof(info), fmt, args); | |
427 | trace_mark_tp(kernel, panic, kernel_panic, probe_kernel_panic, | |
428 | "info %s", info); | |
429 | } | |
430 | ||
431 | void probe_kernel_kernel_kexec(void *_data, struct kimage *image) | |
432 | { | |
433 | trace_mark_tp(kernel, kernel_kexec, kernel_kernel_kexec, | |
434 | probe_kernel_kernel_kexec, "image %p", image); | |
435 | } | |
436 | ||
437 | void probe_kernel_crash_kexec(void *_data, struct kimage *image, struct pt_regs *regs) | |
438 | { | |
439 | trace_mark_tp(kernel, crash_kexec, kernel_crash_kexec, | |
440 | probe_kernel_crash_kexec, "image %p ip %p", image, | |
441 | regs ? (void *)instruction_pointer(regs) : NULL); | |
442 | } | |
443 | ||
444 | /* kernel_page_fault_entry specialized tracepoint probe */ | |
445 | ||
446 | void probe_kernel_page_fault_entry(void *_data, struct pt_regs *regs, int trapnr, | |
447 | struct mm_struct *mm, struct vm_area_struct *vma, | |
448 | unsigned long address, int write_access); | |
449 | ||
450 | DEFINE_MARKER_TP(kernel, page_fault_entry, page_fault_entry, | |
451 | probe_kernel_page_fault_entry, | |
452 | "ip #p%lu address #p%lu trap_id #2u%u write_access #1u%u"); | |
453 | ||
454 | notrace void probe_kernel_page_fault_entry(void *_data, struct pt_regs *regs, int trapnr, | |
455 | struct mm_struct *mm, struct vm_area_struct *vma, | |
456 | unsigned long address, int write_access) | |
457 | { | |
458 | struct marker *marker; | |
459 | struct serialize_long_long_short_char data; | |
460 | ||
461 | if (likely(regs)) | |
462 | data.f1 = instruction_pointer(regs); | |
463 | else | |
464 | data.f1 = 0UL; | |
465 | data.f2 = address; | |
466 | data.f3 = (unsigned short)trapnr; | |
467 | data.f4 = (unsigned char)!!write_access; | |
468 | ||
469 | marker = &GET_MARKER(kernel, page_fault_entry); | |
470 | ltt_specialized_trace(marker, marker->single.probe_private, | |
471 | &data, serialize_sizeof(data), sizeof(long)); | |
472 | } | |
473 | ||
474 | /* kernel_page_fault_exit specialized tracepoint probe */ | |
475 | ||
476 | void probe_kernel_page_fault_exit(void *_data, int res); | |
477 | ||
478 | DEFINE_MARKER_TP(kernel, page_fault_exit, page_fault_exit, | |
479 | probe_kernel_page_fault_exit, | |
480 | "res %d"); | |
481 | ||
482 | notrace void probe_kernel_page_fault_exit(void *_data, int res) | |
483 | { | |
484 | struct marker *marker; | |
485 | ||
486 | marker = &GET_MARKER(kernel, page_fault_exit); | |
487 | ltt_specialized_trace(marker, marker->single.probe_private, | |
488 | &res, sizeof(res), sizeof(res)); | |
489 | } | |
490 | ||
491 | /* kernel_page_fault_nosem_entry specialized tracepoint probe */ | |
492 | ||
493 | void probe_kernel_page_fault_nosem_entry(void *_data, struct pt_regs *regs, | |
494 | int trapnr, unsigned long address); | |
495 | ||
496 | DEFINE_MARKER_TP(kernel, page_fault_nosem_entry, page_fault_nosem_entry, | |
497 | probe_kernel_page_fault_nosem_entry, | |
498 | "ip #p%lu address #p%lu trap_id #2u%u"); | |
499 | ||
500 | notrace void probe_kernel_page_fault_nosem_entry(void *_data, struct pt_regs *regs, | |
501 | int trapnr, unsigned long address) | |
502 | { | |
503 | struct marker *marker; | |
504 | struct serialize_long_long_short data; | |
505 | ||
506 | if (likely(regs)) | |
507 | data.f1 = instruction_pointer(regs); | |
508 | else | |
509 | data.f1 = 0UL; | |
510 | data.f2 = address; | |
511 | data.f3 = (unsigned short)trapnr; | |
512 | ||
513 | marker = &GET_MARKER(kernel, page_fault_nosem_entry); | |
514 | ltt_specialized_trace(marker, marker->single.probe_private, | |
515 | &data, serialize_sizeof(data), sizeof(long)); | |
516 | } | |
517 | ||
518 | /* kernel_page_fault_nosem_exit specialized tracepoint probe */ | |
519 | ||
520 | void probe_kernel_page_fault_nosem_exit(void *_data, int res); | |
521 | ||
522 | DEFINE_MARKER_TP(kernel, page_fault_nosem_exit, page_fault_nosem_exit, | |
523 | probe_kernel_page_fault_nosem_exit, | |
524 | MARK_NOARGS); | |
525 | ||
526 | notrace void probe_kernel_page_fault_nosem_exit(void *_data, int res) | |
527 | { | |
528 | struct marker *marker; | |
529 | ||
530 | marker = &GET_MARKER(kernel, page_fault_nosem_exit); | |
531 | ltt_specialized_trace(marker, marker->single.probe_private, | |
532 | NULL, 0, 0); | |
533 | } | |
534 | ||
535 | /* kernel_page_fault_get_user_entry specialized tracepoint probe */ | |
536 | ||
537 | void probe_kernel_page_fault_get_user_entry(void *_data, struct mm_struct *mm, | |
538 | struct vm_area_struct *vma, unsigned long address, int write_access); | |
539 | ||
540 | DEFINE_MARKER_TP(kernel, page_fault_get_user_entry, page_fault_get_user_entry, | |
541 | probe_kernel_page_fault_get_user_entry, | |
542 | "address #p%lu write_access #1u%u"); | |
543 | ||
544 | notrace void probe_kernel_page_fault_get_user_entry(void *_data, struct mm_struct *mm, | |
545 | struct vm_area_struct *vma, unsigned long address, int write_access) | |
546 | { | |
547 | struct marker *marker; | |
548 | struct serialize_long_char data; | |
549 | ||
550 | data.f1 = address; | |
551 | data.f2 = (unsigned char)!!write_access; | |
552 | ||
553 | marker = &GET_MARKER(kernel, page_fault_get_user_entry); | |
554 | ltt_specialized_trace(marker, marker->single.probe_private, | |
555 | &data, serialize_sizeof(data), sizeof(long)); | |
556 | } | |
557 | ||
558 | /* kernel_page_fault_get_user_exit specialized tracepoint probe */ | |
559 | ||
560 | void probe_kernel_page_fault_get_user_exit(void *_data, int res); | |
561 | ||
562 | DEFINE_MARKER_TP(kernel, page_fault_get_user_exit, page_fault_get_user_exit, | |
563 | probe_kernel_page_fault_get_user_exit, | |
564 | "res %d"); | |
565 | ||
566 | notrace void probe_kernel_page_fault_get_user_exit(void *_data, int res) | |
567 | { | |
568 | struct marker *marker; | |
569 | ||
570 | marker = &GET_MARKER(kernel, page_fault_get_user_exit); | |
571 | ltt_specialized_trace(marker, marker->single.probe_private, | |
572 | &res, sizeof(res), sizeof(res)); | |
573 | } | |
574 | ||
575 | MODULE_LICENSE("GPL and additional rights"); | |
576 | MODULE_AUTHOR("Mathieu Desnoyers"); | |
577 | MODULE_DESCRIPTION("kernel Tracepoint Probes"); |