| 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"); |