Commit | Line | Data |
---|---|---|
f0868d1e SR |
1 | /* |
2 | * trace_output.c | |
3 | * | |
4 | * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/mutex.h> | |
10 | #include <linux/ftrace.h> | |
11 | ||
12 | #include "trace_output.h" | |
13 | ||
14 | /* must be a power of 2 */ | |
15 | #define EVENT_HASHSIZE 128 | |
16 | ||
17 | static DEFINE_MUTEX(trace_event_mutex); | |
18 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; | |
19 | ||
20 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
21 | ||
0706f1c4 SR |
22 | void trace_print_seq(struct seq_file *m, struct trace_seq *s) |
23 | { | |
24 | int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len; | |
25 | ||
26 | s->buffer[len] = 0; | |
27 | seq_puts(m, s->buffer); | |
28 | ||
29 | trace_seq_init(s); | |
30 | } | |
31 | ||
5ef841f6 SR |
32 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
33 | { | |
34 | struct trace_seq *s = &iter->seq; | |
35 | struct trace_entry *entry = iter->ent; | |
36 | struct bprint_entry *field; | |
37 | int ret; | |
38 | ||
39 | trace_assign_type(field, entry); | |
40 | ||
41 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
42 | if (!ret) | |
43 | return TRACE_TYPE_PARTIAL_LINE; | |
44 | ||
45 | return TRACE_TYPE_HANDLED; | |
46 | } | |
47 | ||
48 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
49 | { | |
50 | struct trace_seq *s = &iter->seq; | |
51 | struct trace_entry *entry = iter->ent; | |
52 | struct print_entry *field; | |
53 | int ret; | |
54 | ||
55 | trace_assign_type(field, entry); | |
56 | ||
57 | ret = trace_seq_printf(s, "%s", field->buf); | |
58 | if (!ret) | |
59 | return TRACE_TYPE_PARTIAL_LINE; | |
60 | ||
61 | return TRACE_TYPE_HANDLED; | |
62 | } | |
63 | ||
f0868d1e SR |
64 | /** |
65 | * trace_seq_printf - sequence printing of trace information | |
66 | * @s: trace sequence descriptor | |
67 | * @fmt: printf format string | |
68 | * | |
69 | * The tracer may use either sequence operations or its own | |
70 | * copy to user routines. To simplify formating of a trace | |
71 | * trace_seq_printf is used to store strings into a special | |
72 | * buffer (@s). Then the output may be either used by | |
73 | * the sequencer or pulled into another buffer. | |
74 | */ | |
75 | int | |
76 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
77 | { | |
78 | int len = (PAGE_SIZE - 1) - s->len; | |
79 | va_list ap; | |
80 | int ret; | |
81 | ||
82 | if (!len) | |
83 | return 0; | |
84 | ||
85 | va_start(ap, fmt); | |
86 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
87 | va_end(ap); | |
88 | ||
89 | /* If we can't write it all, don't bother writing anything */ | |
90 | if (ret >= len) | |
91 | return 0; | |
92 | ||
93 | s->len += ret; | |
94 | ||
95 | return len; | |
96 | } | |
17c873ec | 97 | EXPORT_SYMBOL_GPL(trace_seq_printf); |
f0868d1e | 98 | |
769b0441 | 99 | int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
1427cdf0 LJ |
100 | { |
101 | int len = (PAGE_SIZE - 1) - s->len; | |
102 | int ret; | |
103 | ||
104 | if (!len) | |
105 | return 0; | |
106 | ||
107 | ret = bstr_printf(s->buffer + s->len, len, fmt, binary); | |
108 | ||
109 | /* If we can't write it all, don't bother writing anything */ | |
110 | if (ret >= len) | |
111 | return 0; | |
112 | ||
113 | s->len += ret; | |
114 | ||
115 | return len; | |
116 | } | |
117 | ||
f0868d1e SR |
118 | /** |
119 | * trace_seq_puts - trace sequence printing of simple string | |
120 | * @s: trace sequence descriptor | |
121 | * @str: simple string to record | |
122 | * | |
123 | * The tracer may use either the sequence operations or its own | |
124 | * copy to user routines. This function records a simple string | |
125 | * into a special buffer (@s) for later retrieval by a sequencer | |
126 | * or other mechanism. | |
127 | */ | |
128 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
129 | { | |
130 | int len = strlen(str); | |
131 | ||
132 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
133 | return 0; | |
134 | ||
135 | memcpy(s->buffer + s->len, str, len); | |
136 | s->len += len; | |
137 | ||
138 | return len; | |
139 | } | |
140 | ||
141 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
142 | { | |
143 | if (s->len >= (PAGE_SIZE - 1)) | |
144 | return 0; | |
145 | ||
146 | s->buffer[s->len++] = c; | |
147 | ||
148 | return 1; | |
149 | } | |
150 | ||
b14b70a6 | 151 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
152 | { |
153 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
154 | return 0; | |
155 | ||
156 | memcpy(s->buffer + s->len, mem, len); | |
157 | s->len += len; | |
158 | ||
159 | return len; | |
160 | } | |
161 | ||
b14b70a6 | 162 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
163 | { |
164 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 165 | const unsigned char *data = mem; |
f0868d1e SR |
166 | int i, j; |
167 | ||
168 | #ifdef __BIG_ENDIAN | |
169 | for (i = 0, j = 0; i < len; i++) { | |
170 | #else | |
171 | for (i = len-1, j = 0; i >= 0; i--) { | |
172 | #endif | |
173 | hex[j++] = hex_asc_hi(data[i]); | |
174 | hex[j++] = hex_asc_lo(data[i]); | |
175 | } | |
176 | hex[j++] = ' '; | |
177 | ||
178 | return trace_seq_putmem(s, hex, j); | |
179 | } | |
180 | ||
bdd6df6a EGM |
181 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
182 | { | |
183 | void *ret; | |
184 | ||
185 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
186 | return NULL; | |
187 | ||
188 | ret = s->buffer + s->len; | |
189 | s->len += len; | |
190 | ||
191 | return ret; | |
192 | } | |
193 | ||
f0868d1e SR |
194 | int trace_seq_path(struct trace_seq *s, struct path *path) |
195 | { | |
196 | unsigned char *p; | |
197 | ||
198 | if (s->len >= (PAGE_SIZE - 1)) | |
199 | return 0; | |
200 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); | |
201 | if (!IS_ERR(p)) { | |
202 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
203 | if (p) { | |
204 | s->len = p - s->buffer; | |
205 | return 1; | |
206 | } | |
207 | } else { | |
208 | s->buffer[s->len++] = '?'; | |
209 | return 1; | |
210 | } | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | #ifdef CONFIG_KRETPROBES | |
216 | static inline const char *kretprobed(const char *name) | |
217 | { | |
218 | static const char tramp_name[] = "kretprobe_trampoline"; | |
219 | int size = sizeof(tramp_name); | |
220 | ||
221 | if (strncmp(tramp_name, name, size) == 0) | |
222 | return "[unknown/kretprobe'd]"; | |
223 | return name; | |
224 | } | |
225 | #else | |
226 | static inline const char *kretprobed(const char *name) | |
227 | { | |
228 | return name; | |
229 | } | |
230 | #endif /* CONFIG_KRETPROBES */ | |
231 | ||
232 | static int | |
233 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
234 | { | |
235 | #ifdef CONFIG_KALLSYMS | |
236 | char str[KSYM_SYMBOL_LEN]; | |
237 | const char *name; | |
238 | ||
239 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
240 | ||
241 | name = kretprobed(str); | |
242 | ||
243 | return trace_seq_printf(s, fmt, name); | |
244 | #endif | |
245 | return 1; | |
246 | } | |
247 | ||
248 | static int | |
249 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
250 | unsigned long address) | |
251 | { | |
252 | #ifdef CONFIG_KALLSYMS | |
253 | char str[KSYM_SYMBOL_LEN]; | |
254 | const char *name; | |
255 | ||
256 | sprint_symbol(str, address); | |
257 | name = kretprobed(str); | |
258 | ||
259 | return trace_seq_printf(s, fmt, name); | |
260 | #endif | |
261 | return 1; | |
262 | } | |
263 | ||
264 | #ifndef CONFIG_64BIT | |
265 | # define IP_FMT "%08lx" | |
266 | #else | |
267 | # define IP_FMT "%016lx" | |
268 | #endif | |
269 | ||
270 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
271 | unsigned long ip, unsigned long sym_flags) | |
272 | { | |
273 | struct file *file = NULL; | |
274 | unsigned long vmstart = 0; | |
275 | int ret = 1; | |
276 | ||
277 | if (mm) { | |
278 | const struct vm_area_struct *vma; | |
279 | ||
280 | down_read(&mm->mmap_sem); | |
281 | vma = find_vma(mm, ip); | |
282 | if (vma) { | |
283 | file = vma->vm_file; | |
284 | vmstart = vma->vm_start; | |
285 | } | |
286 | if (file) { | |
287 | ret = trace_seq_path(s, &file->f_path); | |
288 | if (ret) | |
289 | ret = trace_seq_printf(s, "[+0x%lx]", | |
290 | ip - vmstart); | |
291 | } | |
292 | up_read(&mm->mmap_sem); | |
293 | } | |
294 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
295 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
296 | return ret; | |
297 | } | |
298 | ||
299 | int | |
300 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
301 | unsigned long sym_flags) | |
302 | { | |
303 | struct mm_struct *mm = NULL; | |
304 | int ret = 1; | |
305 | unsigned int i; | |
306 | ||
307 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
308 | struct task_struct *task; | |
309 | /* | |
310 | * we do the lookup on the thread group leader, | |
311 | * since individual threads might have already quit! | |
312 | */ | |
313 | rcu_read_lock(); | |
314 | task = find_task_by_vpid(entry->ent.tgid); | |
315 | if (task) | |
316 | mm = get_task_mm(task); | |
317 | rcu_read_unlock(); | |
318 | } | |
319 | ||
320 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
321 | unsigned long ip = entry->caller[i]; | |
322 | ||
323 | if (ip == ULONG_MAX || !ret) | |
324 | break; | |
325 | if (i && ret) | |
326 | ret = trace_seq_puts(s, " <- "); | |
327 | if (!ip) { | |
328 | if (ret) | |
329 | ret = trace_seq_puts(s, "??"); | |
330 | continue; | |
331 | } | |
332 | if (!ret) | |
333 | break; | |
334 | if (ret) | |
335 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
336 | } | |
337 | ||
338 | if (mm) | |
339 | mmput(mm); | |
340 | return ret; | |
341 | } | |
342 | ||
343 | int | |
344 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
345 | { | |
346 | int ret; | |
347 | ||
348 | if (!ip) | |
349 | return trace_seq_printf(s, "0"); | |
350 | ||
351 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
352 | ret = seq_print_sym_offset(s, "%s", ip); | |
353 | else | |
354 | ret = seq_print_sym_short(s, "%s", ip); | |
355 | ||
356 | if (!ret) | |
357 | return 0; | |
358 | ||
359 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
360 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
361 | return ret; | |
362 | } | |
363 | ||
d9793bd8 | 364 | static int |
c4a8e8be FW |
365 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) |
366 | { | |
367 | int hardirq, softirq; | |
4ca53085 | 368 | char comm[TASK_COMM_LEN]; |
c4a8e8be | 369 | |
4ca53085 | 370 | trace_find_cmdline(entry->pid, comm); |
c4a8e8be FW |
371 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
372 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 ACM |
373 | |
374 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d%c%c%c", | |
375 | comm, entry->pid, cpu, | |
376 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
377 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? | |
378 | 'X' : '.', | |
379 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? | |
380 | 'N' : '.', | |
381 | (hardirq && softirq) ? 'H' : | |
382 | hardirq ? 'h' : softirq ? 's' : '.')) | |
383 | return 0; | |
c4a8e8be FW |
384 | |
385 | if (entry->preempt_count) | |
d9793bd8 ACM |
386 | return trace_seq_printf(s, "%x", entry->preempt_count); |
387 | return trace_seq_puts(s, "."); | |
c4a8e8be FW |
388 | } |
389 | ||
390 | static unsigned long preempt_mark_thresh = 100; | |
391 | ||
d9793bd8 | 392 | static int |
c4a8e8be FW |
393 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
394 | unsigned long rel_usecs) | |
395 | { | |
d9793bd8 ACM |
396 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
397 | rel_usecs > preempt_mark_thresh ? '!' : | |
398 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
399 | } |
400 | ||
401 | int trace_print_context(struct trace_iterator *iter) | |
402 | { | |
403 | struct trace_seq *s = &iter->seq; | |
404 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
405 | unsigned long long t = ns2usecs(iter->ts); |
406 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
407 | unsigned long secs = (unsigned long)t; | |
4ca53085 SR |
408 | char comm[TASK_COMM_LEN]; |
409 | ||
410 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 411 | |
d9793bd8 | 412 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
1830b52d | 413 | comm, entry->pid, iter->cpu, secs, usec_rem); |
c4a8e8be FW |
414 | } |
415 | ||
416 | int trace_print_lat_context(struct trace_iterator *iter) | |
417 | { | |
418 | u64 next_ts; | |
d9793bd8 | 419 | int ret; |
c4a8e8be FW |
420 | struct trace_seq *s = &iter->seq; |
421 | struct trace_entry *entry = iter->ent, | |
422 | *next_entry = trace_find_next_entry(iter, NULL, | |
423 | &next_ts); | |
424 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
425 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
426 | unsigned long rel_usecs; | |
427 | ||
428 | if (!next_entry) | |
429 | next_ts = iter->ts; | |
430 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
431 | ||
432 | if (verbose) { | |
4ca53085 SR |
433 | char comm[TASK_COMM_LEN]; |
434 | ||
435 | trace_find_cmdline(entry->pid, comm); | |
436 | ||
cf8e3474 | 437 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 438 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 439 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
440 | entry->preempt_count, iter->idx, |
441 | ns2usecs(iter->ts), | |
442 | abs_usecs / USEC_PER_MSEC, | |
443 | abs_usecs % USEC_PER_MSEC, | |
444 | rel_usecs / USEC_PER_MSEC, | |
445 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 446 | } else { |
1830b52d | 447 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
448 | if (ret) |
449 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
450 | } |
451 | ||
d9793bd8 | 452 | return ret; |
c4a8e8be FW |
453 | } |
454 | ||
f633cef0 SR |
455 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
456 | ||
457 | static int task_state_char(unsigned long state) | |
458 | { | |
459 | int bit = state ? __ffs(state) + 1 : 0; | |
460 | ||
461 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
462 | } | |
463 | ||
f0868d1e SR |
464 | /** |
465 | * ftrace_find_event - find a registered event | |
466 | * @type: the type of event to look for | |
467 | * | |
468 | * Returns an event of type @type otherwise NULL | |
469 | */ | |
470 | struct trace_event *ftrace_find_event(int type) | |
471 | { | |
472 | struct trace_event *event; | |
473 | struct hlist_node *n; | |
474 | unsigned key; | |
475 | ||
476 | key = type & (EVENT_HASHSIZE - 1); | |
477 | ||
478 | hlist_for_each_entry_rcu(event, n, &event_hash[key], node) { | |
479 | if (event->type == type) | |
480 | return event; | |
481 | } | |
482 | ||
483 | return NULL; | |
484 | } | |
485 | ||
060fa5c8 SR |
486 | static LIST_HEAD(ftrace_event_list); |
487 | ||
488 | static int trace_search_list(struct list_head **list) | |
489 | { | |
490 | struct trace_event *e; | |
491 | int last = __TRACE_LAST_TYPE; | |
492 | ||
493 | if (list_empty(&ftrace_event_list)) { | |
494 | *list = &ftrace_event_list; | |
495 | return last + 1; | |
496 | } | |
497 | ||
498 | /* | |
499 | * We used up all possible max events, | |
500 | * lets see if somebody freed one. | |
501 | */ | |
502 | list_for_each_entry(e, &ftrace_event_list, list) { | |
503 | if (e->type != last + 1) | |
504 | break; | |
505 | last++; | |
506 | } | |
507 | ||
508 | /* Did we used up all 65 thousand events??? */ | |
509 | if ((last + 1) > FTRACE_MAX_EVENT) | |
510 | return 0; | |
511 | ||
512 | *list = &e->list; | |
513 | return last + 1; | |
514 | } | |
515 | ||
f0868d1e SR |
516 | /** |
517 | * register_ftrace_event - register output for an event type | |
518 | * @event: the event type to register | |
519 | * | |
520 | * Event types are stored in a hash and this hash is used to | |
521 | * find a way to print an event. If the @event->type is set | |
522 | * then it will use that type, otherwise it will assign a | |
523 | * type to use. | |
524 | * | |
525 | * If you assign your own type, please make sure it is added | |
526 | * to the trace_type enum in trace.h, to avoid collisions | |
527 | * with the dynamic types. | |
528 | * | |
529 | * Returns the event type number or zero on error. | |
530 | */ | |
531 | int register_ftrace_event(struct trace_event *event) | |
532 | { | |
533 | unsigned key; | |
534 | int ret = 0; | |
535 | ||
536 | mutex_lock(&trace_event_mutex); | |
537 | ||
060fa5c8 | 538 | if (WARN_ON(!event)) |
28bea271 | 539 | goto out; |
28bea271 | 540 | |
060fa5c8 SR |
541 | INIT_LIST_HEAD(&event->list); |
542 | ||
543 | if (!event->type) { | |
544 | struct list_head *list; | |
545 | ||
546 | if (next_event_type > FTRACE_MAX_EVENT) { | |
547 | ||
548 | event->type = trace_search_list(&list); | |
549 | if (!event->type) | |
550 | goto out; | |
551 | ||
552 | } else { | |
553 | ||
554 | event->type = next_event_type++; | |
555 | list = &ftrace_event_list; | |
556 | } | |
557 | ||
558 | if (WARN_ON(ftrace_find_event(event->type))) | |
559 | goto out; | |
560 | ||
561 | list_add_tail(&event->list, list); | |
562 | ||
563 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
564 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
565 | WARN_ON(1); | |
f0868d1e | 566 | goto out; |
060fa5c8 SR |
567 | } else { |
568 | /* Is this event already used */ | |
569 | if (ftrace_find_event(event->type)) | |
570 | goto out; | |
571 | } | |
f0868d1e | 572 | |
268ccda0 ACM |
573 | if (event->trace == NULL) |
574 | event->trace = trace_nop_print; | |
268ccda0 ACM |
575 | if (event->raw == NULL) |
576 | event->raw = trace_nop_print; | |
577 | if (event->hex == NULL) | |
578 | event->hex = trace_nop_print; | |
579 | if (event->binary == NULL) | |
580 | event->binary = trace_nop_print; | |
581 | ||
f0868d1e SR |
582 | key = event->type & (EVENT_HASHSIZE - 1); |
583 | ||
584 | hlist_add_head_rcu(&event->node, &event_hash[key]); | |
585 | ||
586 | ret = event->type; | |
587 | out: | |
588 | mutex_unlock(&trace_event_mutex); | |
589 | ||
590 | return ret; | |
591 | } | |
17c873ec | 592 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e SR |
593 | |
594 | /** | |
595 | * unregister_ftrace_event - remove a no longer used event | |
596 | * @event: the event to remove | |
597 | */ | |
598 | int unregister_ftrace_event(struct trace_event *event) | |
599 | { | |
600 | mutex_lock(&trace_event_mutex); | |
601 | hlist_del(&event->node); | |
060fa5c8 | 602 | list_del(&event->list); |
f0868d1e SR |
603 | mutex_unlock(&trace_event_mutex); |
604 | ||
605 | return 0; | |
606 | } | |
17c873ec | 607 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
608 | |
609 | /* | |
610 | * Standard events | |
611 | */ | |
612 | ||
ae7462b4 | 613 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags) |
f633cef0 | 614 | { |
d9793bd8 | 615 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
616 | } |
617 | ||
618 | /* TRACE_FN */ | |
ae7462b4 | 619 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags) |
f633cef0 SR |
620 | { |
621 | struct ftrace_entry *field; | |
2c9b238e | 622 | struct trace_seq *s = &iter->seq; |
f633cef0 | 623 | |
2c9b238e | 624 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
625 | |
626 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
627 | goto partial; | |
628 | ||
629 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
630 | if (!trace_seq_printf(s, " <-")) | |
631 | goto partial; | |
632 | if (!seq_print_ip_sym(s, | |
633 | field->parent_ip, | |
634 | flags)) | |
635 | goto partial; | |
636 | } | |
637 | if (!trace_seq_printf(s, "\n")) | |
638 | goto partial; | |
639 | ||
d9793bd8 | 640 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
641 | |
642 | partial: | |
643 | return TRACE_TYPE_PARTIAL_LINE; | |
644 | } | |
645 | ||
ae7462b4 | 646 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags) |
f633cef0 SR |
647 | { |
648 | struct ftrace_entry *field; | |
649 | ||
2c9b238e | 650 | trace_assign_type(field, iter->ent); |
f633cef0 | 651 | |
2c9b238e | 652 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
653 | field->ip, |
654 | field->parent_ip)) | |
f633cef0 SR |
655 | return TRACE_TYPE_PARTIAL_LINE; |
656 | ||
d9793bd8 | 657 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
658 | } |
659 | ||
ae7462b4 | 660 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags) |
f633cef0 SR |
661 | { |
662 | struct ftrace_entry *field; | |
2c9b238e | 663 | struct trace_seq *s = &iter->seq; |
f633cef0 | 664 | |
2c9b238e | 665 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
666 | |
667 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
668 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
669 | ||
d9793bd8 | 670 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
671 | } |
672 | ||
ae7462b4 | 673 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags) |
f633cef0 SR |
674 | { |
675 | struct ftrace_entry *field; | |
2c9b238e | 676 | struct trace_seq *s = &iter->seq; |
f633cef0 | 677 | |
2c9b238e | 678 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
679 | |
680 | SEQ_PUT_FIELD_RET(s, field->ip); | |
681 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
682 | ||
d9793bd8 | 683 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
684 | } |
685 | ||
686 | static struct trace_event trace_fn_event = { | |
ef18012b | 687 | .type = TRACE_FN, |
f633cef0 | 688 | .trace = trace_fn_trace, |
f633cef0 SR |
689 | .raw = trace_fn_raw, |
690 | .hex = trace_fn_hex, | |
691 | .binary = trace_fn_bin, | |
692 | }; | |
693 | ||
694 | /* TRACE_CTX an TRACE_WAKE */ | |
ae7462b4 ACM |
695 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
696 | char *delim) | |
f633cef0 SR |
697 | { |
698 | struct ctx_switch_entry *field; | |
4ca53085 | 699 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
700 | int S, T; |
701 | ||
4ca53085 | 702 | |
2c9b238e | 703 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
704 | |
705 | T = task_state_char(field->next_state); | |
706 | S = task_state_char(field->prev_state); | |
4ca53085 | 707 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
708 | if (!trace_seq_printf(&iter->seq, |
709 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
710 | field->prev_pid, |
711 | field->prev_prio, | |
712 | S, delim, | |
713 | field->next_cpu, | |
714 | field->next_pid, | |
715 | field->next_prio, | |
716 | T, comm)) | |
f633cef0 SR |
717 | return TRACE_TYPE_PARTIAL_LINE; |
718 | ||
d9793bd8 | 719 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
720 | } |
721 | ||
ae7462b4 | 722 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags) |
f633cef0 | 723 | { |
2c9b238e | 724 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
725 | } |
726 | ||
ae7462b4 ACM |
727 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
728 | int flags) | |
f633cef0 | 729 | { |
2c9b238e | 730 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
731 | } |
732 | ||
2c9b238e | 733 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
734 | { |
735 | struct ctx_switch_entry *field; | |
736 | int T; | |
737 | ||
2c9b238e | 738 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
739 | |
740 | if (!S) | |
741 | task_state_char(field->prev_state); | |
742 | T = task_state_char(field->next_state); | |
2c9b238e | 743 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
744 | field->prev_pid, |
745 | field->prev_prio, | |
746 | S, | |
747 | field->next_cpu, | |
748 | field->next_pid, | |
749 | field->next_prio, | |
750 | T)) | |
f633cef0 SR |
751 | return TRACE_TYPE_PARTIAL_LINE; |
752 | ||
d9793bd8 | 753 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
754 | } |
755 | ||
ae7462b4 | 756 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 757 | { |
2c9b238e | 758 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
759 | } |
760 | ||
ae7462b4 | 761 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 762 | { |
2c9b238e | 763 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
764 | } |
765 | ||
766 | ||
2c9b238e | 767 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
768 | { |
769 | struct ctx_switch_entry *field; | |
2c9b238e | 770 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
771 | int T; |
772 | ||
2c9b238e | 773 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
774 | |
775 | if (!S) | |
776 | task_state_char(field->prev_state); | |
777 | T = task_state_char(field->next_state); | |
778 | ||
779 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
780 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
781 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
782 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
783 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
784 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
785 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
786 | ||
d9793bd8 | 787 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
788 | } |
789 | ||
ae7462b4 | 790 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 791 | { |
2c9b238e | 792 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
793 | } |
794 | ||
ae7462b4 | 795 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 796 | { |
2c9b238e | 797 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
798 | } |
799 | ||
ae7462b4 ACM |
800 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
801 | int flags) | |
f633cef0 SR |
802 | { |
803 | struct ctx_switch_entry *field; | |
2c9b238e | 804 | struct trace_seq *s = &iter->seq; |
f633cef0 | 805 | |
2c9b238e | 806 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
807 | |
808 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
809 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
810 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
811 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
812 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
813 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
814 | ||
d9793bd8 | 815 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
816 | } |
817 | ||
818 | static struct trace_event trace_ctx_event = { | |
ef18012b | 819 | .type = TRACE_CTX, |
f633cef0 | 820 | .trace = trace_ctx_print, |
f633cef0 SR |
821 | .raw = trace_ctx_raw, |
822 | .hex = trace_ctx_hex, | |
823 | .binary = trace_ctxwake_bin, | |
824 | }; | |
825 | ||
826 | static struct trace_event trace_wake_event = { | |
ef18012b | 827 | .type = TRACE_WAKE, |
f633cef0 | 828 | .trace = trace_wake_print, |
f633cef0 SR |
829 | .raw = trace_wake_raw, |
830 | .hex = trace_wake_hex, | |
831 | .binary = trace_ctxwake_bin, | |
832 | }; | |
833 | ||
834 | /* TRACE_SPECIAL */ | |
ae7462b4 ACM |
835 | static enum print_line_t trace_special_print(struct trace_iterator *iter, |
836 | int flags) | |
f633cef0 SR |
837 | { |
838 | struct special_entry *field; | |
839 | ||
2c9b238e | 840 | trace_assign_type(field, iter->ent); |
f633cef0 | 841 | |
2c9b238e | 842 | if (!trace_seq_printf(&iter->seq, "# %ld %ld %ld\n", |
6c1a99af LJ |
843 | field->arg1, |
844 | field->arg2, | |
845 | field->arg3)) | |
f633cef0 SR |
846 | return TRACE_TYPE_PARTIAL_LINE; |
847 | ||
d9793bd8 | 848 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
849 | } |
850 | ||
ae7462b4 ACM |
851 | static enum print_line_t trace_special_hex(struct trace_iterator *iter, |
852 | int flags) | |
f633cef0 SR |
853 | { |
854 | struct special_entry *field; | |
2c9b238e | 855 | struct trace_seq *s = &iter->seq; |
f633cef0 | 856 | |
2c9b238e | 857 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
858 | |
859 | SEQ_PUT_HEX_FIELD_RET(s, field->arg1); | |
860 | SEQ_PUT_HEX_FIELD_RET(s, field->arg2); | |
861 | SEQ_PUT_HEX_FIELD_RET(s, field->arg3); | |
862 | ||
d9793bd8 | 863 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
864 | } |
865 | ||
ae7462b4 ACM |
866 | static enum print_line_t trace_special_bin(struct trace_iterator *iter, |
867 | int flags) | |
f633cef0 SR |
868 | { |
869 | struct special_entry *field; | |
2c9b238e | 870 | struct trace_seq *s = &iter->seq; |
f633cef0 | 871 | |
2c9b238e | 872 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
873 | |
874 | SEQ_PUT_FIELD_RET(s, field->arg1); | |
875 | SEQ_PUT_FIELD_RET(s, field->arg2); | |
876 | SEQ_PUT_FIELD_RET(s, field->arg3); | |
877 | ||
d9793bd8 | 878 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
879 | } |
880 | ||
881 | static struct trace_event trace_special_event = { | |
ef18012b | 882 | .type = TRACE_SPECIAL, |
f633cef0 | 883 | .trace = trace_special_print, |
f633cef0 SR |
884 | .raw = trace_special_print, |
885 | .hex = trace_special_hex, | |
886 | .binary = trace_special_bin, | |
887 | }; | |
888 | ||
889 | /* TRACE_STACK */ | |
890 | ||
ae7462b4 ACM |
891 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
892 | int flags) | |
f633cef0 SR |
893 | { |
894 | struct stack_entry *field; | |
2c9b238e | 895 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
896 | int i; |
897 | ||
2c9b238e | 898 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
899 | |
900 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
901 | if (i) { | |
6c1a99af | 902 | if (!trace_seq_puts(s, " <= ")) |
f633cef0 SR |
903 | goto partial; |
904 | ||
6c1a99af | 905 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
f633cef0 SR |
906 | goto partial; |
907 | } | |
6c1a99af | 908 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
909 | goto partial; |
910 | } | |
911 | ||
d9793bd8 | 912 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
913 | |
914 | partial: | |
915 | return TRACE_TYPE_PARTIAL_LINE; | |
916 | } | |
917 | ||
918 | static struct trace_event trace_stack_event = { | |
ef18012b | 919 | .type = TRACE_STACK, |
f633cef0 | 920 | .trace = trace_stack_print, |
f633cef0 SR |
921 | .raw = trace_special_print, |
922 | .hex = trace_special_hex, | |
923 | .binary = trace_special_bin, | |
924 | }; | |
925 | ||
926 | /* TRACE_USER_STACK */ | |
ae7462b4 ACM |
927 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
928 | int flags) | |
f633cef0 SR |
929 | { |
930 | struct userstack_entry *field; | |
2c9b238e | 931 | struct trace_seq *s = &iter->seq; |
f633cef0 | 932 | |
2c9b238e | 933 | trace_assign_type(field, iter->ent); |
f633cef0 | 934 | |
6c1a99af | 935 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
936 | goto partial; |
937 | ||
6c1a99af | 938 | if (!trace_seq_putc(s, '\n')) |
f633cef0 SR |
939 | goto partial; |
940 | ||
d9793bd8 | 941 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
942 | |
943 | partial: | |
944 | return TRACE_TYPE_PARTIAL_LINE; | |
945 | } | |
946 | ||
947 | static struct trace_event trace_user_stack_event = { | |
ef18012b | 948 | .type = TRACE_USER_STACK, |
f633cef0 | 949 | .trace = trace_user_stack_print, |
f633cef0 SR |
950 | .raw = trace_special_print, |
951 | .hex = trace_special_hex, | |
952 | .binary = trace_special_bin, | |
953 | }; | |
954 | ||
48ead020 | 955 | /* TRACE_BPRINT */ |
1427cdf0 | 956 | static enum print_line_t |
48ead020 | 957 | trace_bprint_print(struct trace_iterator *iter, int flags) |
1427cdf0 LJ |
958 | { |
959 | struct trace_entry *entry = iter->ent; | |
960 | struct trace_seq *s = &iter->seq; | |
48ead020 | 961 | struct bprint_entry *field; |
1427cdf0 LJ |
962 | |
963 | trace_assign_type(field, entry); | |
964 | ||
965 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
966 | goto partial; | |
967 | ||
968 | if (!trace_seq_puts(s, ": ")) | |
969 | goto partial; | |
970 | ||
971 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
972 | goto partial; | |
973 | ||
974 | return TRACE_TYPE_HANDLED; | |
975 | ||
976 | partial: | |
977 | return TRACE_TYPE_PARTIAL_LINE; | |
978 | } | |
979 | ||
769b0441 | 980 | |
48ead020 FW |
981 | static enum print_line_t |
982 | trace_bprint_raw(struct trace_iterator *iter, int flags) | |
1427cdf0 | 983 | { |
48ead020 | 984 | struct bprint_entry *field; |
1427cdf0 | 985 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 986 | |
769b0441 | 987 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
988 | |
989 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
990 | goto partial; | |
991 | ||
992 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
993 | goto partial; | |
994 | ||
995 | return TRACE_TYPE_HANDLED; | |
996 | ||
997 | partial: | |
998 | return TRACE_TYPE_PARTIAL_LINE; | |
999 | } | |
1000 | ||
769b0441 | 1001 | |
48ead020 FW |
1002 | static struct trace_event trace_bprint_event = { |
1003 | .type = TRACE_BPRINT, | |
1004 | .trace = trace_bprint_print, | |
1005 | .raw = trace_bprint_raw, | |
1006 | }; | |
1007 | ||
1008 | /* TRACE_PRINT */ | |
1009 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
1010 | int flags) | |
1011 | { | |
1012 | struct print_entry *field; | |
1013 | struct trace_seq *s = &iter->seq; | |
1014 | ||
1015 | trace_assign_type(field, iter->ent); | |
1016 | ||
1017 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1018 | goto partial; | |
1019 | ||
1020 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1021 | goto partial; | |
1022 | ||
1023 | return TRACE_TYPE_HANDLED; | |
1024 | ||
1025 | partial: | |
1026 | return TRACE_TYPE_PARTIAL_LINE; | |
1027 | } | |
1028 | ||
1029 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags) | |
1030 | { | |
1031 | struct print_entry *field; | |
1032 | ||
1033 | trace_assign_type(field, iter->ent); | |
1034 | ||
1035 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1036 | goto partial; | |
1037 | ||
1038 | return TRACE_TYPE_HANDLED; | |
1039 | ||
1040 | partial: | |
1041 | return TRACE_TYPE_PARTIAL_LINE; | |
1042 | } | |
1043 | ||
769b0441 | 1044 | static struct trace_event trace_print_event = { |
48ead020 | 1045 | .type = TRACE_PRINT, |
769b0441 FW |
1046 | .trace = trace_print_print, |
1047 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1048 | }; |
1049 | ||
48ead020 | 1050 | |
f633cef0 SR |
1051 | static struct trace_event *events[] __initdata = { |
1052 | &trace_fn_event, | |
1053 | &trace_ctx_event, | |
1054 | &trace_wake_event, | |
1055 | &trace_special_event, | |
1056 | &trace_stack_event, | |
1057 | &trace_user_stack_event, | |
48ead020 | 1058 | &trace_bprint_event, |
f633cef0 SR |
1059 | &trace_print_event, |
1060 | NULL | |
1061 | }; | |
1062 | ||
1063 | __init static int init_events(void) | |
1064 | { | |
1065 | struct trace_event *event; | |
1066 | int i, ret; | |
1067 | ||
1068 | for (i = 0; events[i]; i++) { | |
1069 | event = events[i]; | |
1070 | ||
1071 | ret = register_ftrace_event(event); | |
1072 | if (!ret) { | |
1073 | printk(KERN_WARNING "event %d failed to register\n", | |
1074 | event->type); | |
1075 | WARN_ON_ONCE(1); | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | return 0; | |
1080 | } | |
1081 | device_initcall(init_events); |