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Commit | Line | Data |
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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 | ||
4f535968 | 17 | static DECLARE_RWSEM(trace_event_mutex); |
be74b73a SR |
18 | |
19 | DEFINE_PER_CPU(struct trace_seq, ftrace_event_seq); | |
ec081ddc | 20 | EXPORT_PER_CPU_SYMBOL(ftrace_event_seq); |
be74b73a | 21 | |
f0868d1e SR |
22 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; |
23 | ||
24 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
25 | ||
0706f1c4 SR |
26 | void trace_print_seq(struct seq_file *m, struct trace_seq *s) |
27 | { | |
28 | int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len; | |
29 | ||
30 | s->buffer[len] = 0; | |
31 | seq_puts(m, s->buffer); | |
32 | ||
33 | trace_seq_init(s); | |
34 | } | |
35 | ||
5ef841f6 SR |
36 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
37 | { | |
38 | struct trace_seq *s = &iter->seq; | |
39 | struct trace_entry *entry = iter->ent; | |
40 | struct bprint_entry *field; | |
41 | int ret; | |
42 | ||
43 | trace_assign_type(field, entry); | |
44 | ||
45 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
46 | if (!ret) | |
47 | return TRACE_TYPE_PARTIAL_LINE; | |
48 | ||
49 | return TRACE_TYPE_HANDLED; | |
50 | } | |
51 | ||
52 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
53 | { | |
54 | struct trace_seq *s = &iter->seq; | |
55 | struct trace_entry *entry = iter->ent; | |
56 | struct print_entry *field; | |
57 | int ret; | |
58 | ||
59 | trace_assign_type(field, entry); | |
60 | ||
61 | ret = trace_seq_printf(s, "%s", field->buf); | |
62 | if (!ret) | |
63 | return TRACE_TYPE_PARTIAL_LINE; | |
64 | ||
65 | return TRACE_TYPE_HANDLED; | |
66 | } | |
67 | ||
f0868d1e SR |
68 | /** |
69 | * trace_seq_printf - sequence printing of trace information | |
70 | * @s: trace sequence descriptor | |
71 | * @fmt: printf format string | |
72 | * | |
73 | * The tracer may use either sequence operations or its own | |
74 | * copy to user routines. To simplify formating of a trace | |
75 | * trace_seq_printf is used to store strings into a special | |
76 | * buffer (@s). Then the output may be either used by | |
77 | * the sequencer or pulled into another buffer. | |
78 | */ | |
79 | int | |
80 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
81 | { | |
82 | int len = (PAGE_SIZE - 1) - s->len; | |
83 | va_list ap; | |
84 | int ret; | |
85 | ||
86 | if (!len) | |
87 | return 0; | |
88 | ||
89 | va_start(ap, fmt); | |
90 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
91 | va_end(ap); | |
92 | ||
93 | /* If we can't write it all, don't bother writing anything */ | |
94 | if (ret >= len) | |
95 | return 0; | |
96 | ||
97 | s->len += ret; | |
98 | ||
99 | return len; | |
100 | } | |
17c873ec | 101 | EXPORT_SYMBOL_GPL(trace_seq_printf); |
f0868d1e | 102 | |
769b0441 | 103 | int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
1427cdf0 LJ |
104 | { |
105 | int len = (PAGE_SIZE - 1) - s->len; | |
106 | int ret; | |
107 | ||
108 | if (!len) | |
109 | return 0; | |
110 | ||
111 | ret = bstr_printf(s->buffer + s->len, len, fmt, binary); | |
112 | ||
113 | /* If we can't write it all, don't bother writing anything */ | |
114 | if (ret >= len) | |
115 | return 0; | |
116 | ||
117 | s->len += ret; | |
118 | ||
119 | return len; | |
120 | } | |
121 | ||
f0868d1e SR |
122 | /** |
123 | * trace_seq_puts - trace sequence printing of simple string | |
124 | * @s: trace sequence descriptor | |
125 | * @str: simple string to record | |
126 | * | |
127 | * The tracer may use either the sequence operations or its own | |
128 | * copy to user routines. This function records a simple string | |
129 | * into a special buffer (@s) for later retrieval by a sequencer | |
130 | * or other mechanism. | |
131 | */ | |
132 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
133 | { | |
134 | int len = strlen(str); | |
135 | ||
136 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
137 | return 0; | |
138 | ||
139 | memcpy(s->buffer + s->len, str, len); | |
140 | s->len += len; | |
141 | ||
142 | return len; | |
143 | } | |
144 | ||
145 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
146 | { | |
147 | if (s->len >= (PAGE_SIZE - 1)) | |
148 | return 0; | |
149 | ||
150 | s->buffer[s->len++] = c; | |
151 | ||
152 | return 1; | |
153 | } | |
154 | ||
b14b70a6 | 155 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
156 | { |
157 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
158 | return 0; | |
159 | ||
160 | memcpy(s->buffer + s->len, mem, len); | |
161 | s->len += len; | |
162 | ||
163 | return len; | |
164 | } | |
165 | ||
b14b70a6 | 166 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
167 | { |
168 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 169 | const unsigned char *data = mem; |
f0868d1e SR |
170 | int i, j; |
171 | ||
172 | #ifdef __BIG_ENDIAN | |
173 | for (i = 0, j = 0; i < len; i++) { | |
174 | #else | |
175 | for (i = len-1, j = 0; i >= 0; i--) { | |
176 | #endif | |
177 | hex[j++] = hex_asc_hi(data[i]); | |
178 | hex[j++] = hex_asc_lo(data[i]); | |
179 | } | |
180 | hex[j++] = ' '; | |
181 | ||
182 | return trace_seq_putmem(s, hex, j); | |
183 | } | |
184 | ||
bdd6df6a EGM |
185 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
186 | { | |
187 | void *ret; | |
188 | ||
189 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
190 | return NULL; | |
191 | ||
192 | ret = s->buffer + s->len; | |
193 | s->len += len; | |
194 | ||
195 | return ret; | |
196 | } | |
197 | ||
f0868d1e SR |
198 | int trace_seq_path(struct trace_seq *s, struct path *path) |
199 | { | |
200 | unsigned char *p; | |
201 | ||
202 | if (s->len >= (PAGE_SIZE - 1)) | |
203 | return 0; | |
204 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); | |
205 | if (!IS_ERR(p)) { | |
206 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
207 | if (p) { | |
208 | s->len = p - s->buffer; | |
209 | return 1; | |
210 | } | |
211 | } else { | |
212 | s->buffer[s->len++] = '?'; | |
213 | return 1; | |
214 | } | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
be74b73a SR |
219 | const char * |
220 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
221 | unsigned long flags, | |
222 | const struct trace_print_flags *flag_array) | |
223 | { | |
224 | unsigned long mask; | |
225 | const char *str; | |
226 | int i; | |
227 | ||
228 | trace_seq_init(p); | |
229 | ||
230 | for (i = 0; flag_array[i].name && flags; i++) { | |
231 | ||
232 | mask = flag_array[i].mask; | |
233 | if ((flags & mask) != mask) | |
234 | continue; | |
235 | ||
236 | str = flag_array[i].name; | |
237 | flags &= ~mask; | |
238 | if (p->len && delim) | |
239 | trace_seq_puts(p, delim); | |
240 | trace_seq_puts(p, str); | |
241 | } | |
242 | ||
243 | /* check for left over flags */ | |
244 | if (flags) { | |
245 | if (p->len && delim) | |
246 | trace_seq_puts(p, delim); | |
247 | trace_seq_printf(p, "0x%lx", flags); | |
248 | } | |
249 | ||
250 | trace_seq_putc(p, 0); | |
251 | ||
252 | return p->buffer; | |
253 | } | |
ec081ddc | 254 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 255 | |
0f4fc29d SR |
256 | const char * |
257 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
258 | const struct trace_print_flags *symbol_array) | |
259 | { | |
260 | int i; | |
261 | ||
262 | trace_seq_init(p); | |
263 | ||
264 | for (i = 0; symbol_array[i].name; i++) { | |
265 | ||
266 | if (val != symbol_array[i].mask) | |
267 | continue; | |
268 | ||
269 | trace_seq_puts(p, symbol_array[i].name); | |
270 | break; | |
271 | } | |
272 | ||
273 | if (!p->len) | |
274 | trace_seq_printf(p, "0x%lx", val); | |
275 | ||
276 | trace_seq_putc(p, 0); | |
277 | ||
278 | return p->buffer; | |
279 | } | |
ec081ddc | 280 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 281 | |
f0868d1e SR |
282 | #ifdef CONFIG_KRETPROBES |
283 | static inline const char *kretprobed(const char *name) | |
284 | { | |
285 | static const char tramp_name[] = "kretprobe_trampoline"; | |
286 | int size = sizeof(tramp_name); | |
287 | ||
288 | if (strncmp(tramp_name, name, size) == 0) | |
289 | return "[unknown/kretprobe'd]"; | |
290 | return name; | |
291 | } | |
292 | #else | |
293 | static inline const char *kretprobed(const char *name) | |
294 | { | |
295 | return name; | |
296 | } | |
297 | #endif /* CONFIG_KRETPROBES */ | |
298 | ||
299 | static int | |
300 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
301 | { | |
302 | #ifdef CONFIG_KALLSYMS | |
303 | char str[KSYM_SYMBOL_LEN]; | |
304 | const char *name; | |
305 | ||
306 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
307 | ||
308 | name = kretprobed(str); | |
309 | ||
310 | return trace_seq_printf(s, fmt, name); | |
311 | #endif | |
312 | return 1; | |
313 | } | |
314 | ||
315 | static int | |
316 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
317 | unsigned long address) | |
318 | { | |
319 | #ifdef CONFIG_KALLSYMS | |
320 | char str[KSYM_SYMBOL_LEN]; | |
321 | const char *name; | |
322 | ||
323 | sprint_symbol(str, address); | |
324 | name = kretprobed(str); | |
325 | ||
326 | return trace_seq_printf(s, fmt, name); | |
327 | #endif | |
328 | return 1; | |
329 | } | |
330 | ||
331 | #ifndef CONFIG_64BIT | |
332 | # define IP_FMT "%08lx" | |
333 | #else | |
334 | # define IP_FMT "%016lx" | |
335 | #endif | |
336 | ||
337 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
338 | unsigned long ip, unsigned long sym_flags) | |
339 | { | |
340 | struct file *file = NULL; | |
341 | unsigned long vmstart = 0; | |
342 | int ret = 1; | |
343 | ||
344 | if (mm) { | |
345 | const struct vm_area_struct *vma; | |
346 | ||
347 | down_read(&mm->mmap_sem); | |
348 | vma = find_vma(mm, ip); | |
349 | if (vma) { | |
350 | file = vma->vm_file; | |
351 | vmstart = vma->vm_start; | |
352 | } | |
353 | if (file) { | |
354 | ret = trace_seq_path(s, &file->f_path); | |
355 | if (ret) | |
356 | ret = trace_seq_printf(s, "[+0x%lx]", | |
357 | ip - vmstart); | |
358 | } | |
359 | up_read(&mm->mmap_sem); | |
360 | } | |
361 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
362 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
363 | return ret; | |
364 | } | |
365 | ||
366 | int | |
367 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
368 | unsigned long sym_flags) | |
369 | { | |
370 | struct mm_struct *mm = NULL; | |
371 | int ret = 1; | |
372 | unsigned int i; | |
373 | ||
374 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
375 | struct task_struct *task; | |
376 | /* | |
377 | * we do the lookup on the thread group leader, | |
378 | * since individual threads might have already quit! | |
379 | */ | |
380 | rcu_read_lock(); | |
381 | task = find_task_by_vpid(entry->ent.tgid); | |
382 | if (task) | |
383 | mm = get_task_mm(task); | |
384 | rcu_read_unlock(); | |
385 | } | |
386 | ||
387 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
388 | unsigned long ip = entry->caller[i]; | |
389 | ||
390 | if (ip == ULONG_MAX || !ret) | |
391 | break; | |
392 | if (i && ret) | |
393 | ret = trace_seq_puts(s, " <- "); | |
394 | if (!ip) { | |
395 | if (ret) | |
396 | ret = trace_seq_puts(s, "??"); | |
397 | continue; | |
398 | } | |
399 | if (!ret) | |
400 | break; | |
401 | if (ret) | |
402 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
403 | } | |
404 | ||
405 | if (mm) | |
406 | mmput(mm); | |
407 | return ret; | |
408 | } | |
409 | ||
410 | int | |
411 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
412 | { | |
413 | int ret; | |
414 | ||
415 | if (!ip) | |
416 | return trace_seq_printf(s, "0"); | |
417 | ||
418 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
419 | ret = seq_print_sym_offset(s, "%s", ip); | |
420 | else | |
421 | ret = seq_print_sym_short(s, "%s", ip); | |
422 | ||
423 | if (!ret) | |
424 | return 0; | |
425 | ||
426 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
427 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
428 | return ret; | |
429 | } | |
430 | ||
d9793bd8 | 431 | static int |
c4a8e8be FW |
432 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) |
433 | { | |
434 | int hardirq, softirq; | |
4ca53085 | 435 | char comm[TASK_COMM_LEN]; |
c4a8e8be | 436 | |
4ca53085 | 437 | trace_find_cmdline(entry->pid, comm); |
c4a8e8be FW |
438 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
439 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 ACM |
440 | |
441 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d%c%c%c", | |
442 | comm, entry->pid, cpu, | |
443 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
444 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? | |
445 | 'X' : '.', | |
446 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? | |
447 | 'N' : '.', | |
448 | (hardirq && softirq) ? 'H' : | |
449 | hardirq ? 'h' : softirq ? 's' : '.')) | |
450 | return 0; | |
c4a8e8be FW |
451 | |
452 | if (entry->preempt_count) | |
d9793bd8 ACM |
453 | return trace_seq_printf(s, "%x", entry->preempt_count); |
454 | return trace_seq_puts(s, "."); | |
c4a8e8be FW |
455 | } |
456 | ||
457 | static unsigned long preempt_mark_thresh = 100; | |
458 | ||
d9793bd8 | 459 | static int |
c4a8e8be FW |
460 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
461 | unsigned long rel_usecs) | |
462 | { | |
d9793bd8 ACM |
463 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
464 | rel_usecs > preempt_mark_thresh ? '!' : | |
465 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
466 | } |
467 | ||
468 | int trace_print_context(struct trace_iterator *iter) | |
469 | { | |
470 | struct trace_seq *s = &iter->seq; | |
471 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
472 | unsigned long long t = ns2usecs(iter->ts); |
473 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
474 | unsigned long secs = (unsigned long)t; | |
4ca53085 SR |
475 | char comm[TASK_COMM_LEN]; |
476 | ||
477 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 478 | |
d9793bd8 | 479 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
1830b52d | 480 | comm, entry->pid, iter->cpu, secs, usec_rem); |
c4a8e8be FW |
481 | } |
482 | ||
483 | int trace_print_lat_context(struct trace_iterator *iter) | |
484 | { | |
485 | u64 next_ts; | |
d9793bd8 | 486 | int ret; |
c4a8e8be FW |
487 | struct trace_seq *s = &iter->seq; |
488 | struct trace_entry *entry = iter->ent, | |
489 | *next_entry = trace_find_next_entry(iter, NULL, | |
490 | &next_ts); | |
491 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
492 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
493 | unsigned long rel_usecs; | |
494 | ||
495 | if (!next_entry) | |
496 | next_ts = iter->ts; | |
497 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
498 | ||
499 | if (verbose) { | |
4ca53085 SR |
500 | char comm[TASK_COMM_LEN]; |
501 | ||
502 | trace_find_cmdline(entry->pid, comm); | |
503 | ||
cf8e3474 | 504 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 505 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 506 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
507 | entry->preempt_count, iter->idx, |
508 | ns2usecs(iter->ts), | |
509 | abs_usecs / USEC_PER_MSEC, | |
510 | abs_usecs % USEC_PER_MSEC, | |
511 | rel_usecs / USEC_PER_MSEC, | |
512 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 513 | } else { |
1830b52d | 514 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
515 | if (ret) |
516 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
517 | } |
518 | ||
d9793bd8 | 519 | return ret; |
c4a8e8be FW |
520 | } |
521 | ||
f633cef0 SR |
522 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
523 | ||
524 | static int task_state_char(unsigned long state) | |
525 | { | |
526 | int bit = state ? __ffs(state) + 1 : 0; | |
527 | ||
528 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
529 | } | |
530 | ||
f0868d1e SR |
531 | /** |
532 | * ftrace_find_event - find a registered event | |
533 | * @type: the type of event to look for | |
534 | * | |
535 | * Returns an event of type @type otherwise NULL | |
4f535968 | 536 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
537 | */ |
538 | struct trace_event *ftrace_find_event(int type) | |
539 | { | |
540 | struct trace_event *event; | |
541 | struct hlist_node *n; | |
542 | unsigned key; | |
543 | ||
544 | key = type & (EVENT_HASHSIZE - 1); | |
545 | ||
4f535968 | 546 | hlist_for_each_entry(event, n, &event_hash[key], node) { |
f0868d1e SR |
547 | if (event->type == type) |
548 | return event; | |
549 | } | |
550 | ||
551 | return NULL; | |
552 | } | |
553 | ||
060fa5c8 SR |
554 | static LIST_HEAD(ftrace_event_list); |
555 | ||
556 | static int trace_search_list(struct list_head **list) | |
557 | { | |
558 | struct trace_event *e; | |
559 | int last = __TRACE_LAST_TYPE; | |
560 | ||
561 | if (list_empty(&ftrace_event_list)) { | |
562 | *list = &ftrace_event_list; | |
563 | return last + 1; | |
564 | } | |
565 | ||
566 | /* | |
567 | * We used up all possible max events, | |
568 | * lets see if somebody freed one. | |
569 | */ | |
570 | list_for_each_entry(e, &ftrace_event_list, list) { | |
571 | if (e->type != last + 1) | |
572 | break; | |
573 | last++; | |
574 | } | |
575 | ||
576 | /* Did we used up all 65 thousand events??? */ | |
577 | if ((last + 1) > FTRACE_MAX_EVENT) | |
578 | return 0; | |
579 | ||
580 | *list = &e->list; | |
581 | return last + 1; | |
582 | } | |
583 | ||
4f535968 LJ |
584 | void trace_event_read_lock(void) |
585 | { | |
586 | down_read(&trace_event_mutex); | |
587 | } | |
588 | ||
589 | void trace_event_read_unlock(void) | |
590 | { | |
591 | up_read(&trace_event_mutex); | |
592 | } | |
593 | ||
f0868d1e SR |
594 | /** |
595 | * register_ftrace_event - register output for an event type | |
596 | * @event: the event type to register | |
597 | * | |
598 | * Event types are stored in a hash and this hash is used to | |
599 | * find a way to print an event. If the @event->type is set | |
600 | * then it will use that type, otherwise it will assign a | |
601 | * type to use. | |
602 | * | |
603 | * If you assign your own type, please make sure it is added | |
604 | * to the trace_type enum in trace.h, to avoid collisions | |
605 | * with the dynamic types. | |
606 | * | |
607 | * Returns the event type number or zero on error. | |
608 | */ | |
609 | int register_ftrace_event(struct trace_event *event) | |
610 | { | |
611 | unsigned key; | |
612 | int ret = 0; | |
613 | ||
4f535968 | 614 | down_write(&trace_event_mutex); |
f0868d1e | 615 | |
060fa5c8 | 616 | if (WARN_ON(!event)) |
28bea271 | 617 | goto out; |
28bea271 | 618 | |
060fa5c8 SR |
619 | INIT_LIST_HEAD(&event->list); |
620 | ||
621 | if (!event->type) { | |
48dd0fed | 622 | struct list_head *list = NULL; |
060fa5c8 SR |
623 | |
624 | if (next_event_type > FTRACE_MAX_EVENT) { | |
625 | ||
626 | event->type = trace_search_list(&list); | |
627 | if (!event->type) | |
628 | goto out; | |
629 | ||
630 | } else { | |
631 | ||
632 | event->type = next_event_type++; | |
633 | list = &ftrace_event_list; | |
634 | } | |
635 | ||
636 | if (WARN_ON(ftrace_find_event(event->type))) | |
637 | goto out; | |
638 | ||
639 | list_add_tail(&event->list, list); | |
640 | ||
641 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
642 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
643 | WARN_ON(1); | |
f0868d1e | 644 | goto out; |
060fa5c8 SR |
645 | } else { |
646 | /* Is this event already used */ | |
647 | if (ftrace_find_event(event->type)) | |
648 | goto out; | |
649 | } | |
f0868d1e | 650 | |
268ccda0 ACM |
651 | if (event->trace == NULL) |
652 | event->trace = trace_nop_print; | |
268ccda0 ACM |
653 | if (event->raw == NULL) |
654 | event->raw = trace_nop_print; | |
655 | if (event->hex == NULL) | |
656 | event->hex = trace_nop_print; | |
657 | if (event->binary == NULL) | |
658 | event->binary = trace_nop_print; | |
659 | ||
f0868d1e SR |
660 | key = event->type & (EVENT_HASHSIZE - 1); |
661 | ||
4f535968 | 662 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
663 | |
664 | ret = event->type; | |
665 | out: | |
4f535968 | 666 | up_write(&trace_event_mutex); |
f0868d1e SR |
667 | |
668 | return ret; | |
669 | } | |
17c873ec | 670 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e SR |
671 | |
672 | /** | |
673 | * unregister_ftrace_event - remove a no longer used event | |
674 | * @event: the event to remove | |
675 | */ | |
676 | int unregister_ftrace_event(struct trace_event *event) | |
677 | { | |
4f535968 | 678 | down_write(&trace_event_mutex); |
f0868d1e | 679 | hlist_del(&event->node); |
060fa5c8 | 680 | list_del(&event->list); |
4f535968 | 681 | up_write(&trace_event_mutex); |
f0868d1e SR |
682 | |
683 | return 0; | |
684 | } | |
17c873ec | 685 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
686 | |
687 | /* | |
688 | * Standard events | |
689 | */ | |
690 | ||
ae7462b4 | 691 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags) |
f633cef0 | 692 | { |
d9793bd8 | 693 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
694 | } |
695 | ||
696 | /* TRACE_FN */ | |
ae7462b4 | 697 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags) |
f633cef0 SR |
698 | { |
699 | struct ftrace_entry *field; | |
2c9b238e | 700 | struct trace_seq *s = &iter->seq; |
f633cef0 | 701 | |
2c9b238e | 702 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
703 | |
704 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
705 | goto partial; | |
706 | ||
707 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
708 | if (!trace_seq_printf(s, " <-")) | |
709 | goto partial; | |
710 | if (!seq_print_ip_sym(s, | |
711 | field->parent_ip, | |
712 | flags)) | |
713 | goto partial; | |
714 | } | |
715 | if (!trace_seq_printf(s, "\n")) | |
716 | goto partial; | |
717 | ||
d9793bd8 | 718 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
719 | |
720 | partial: | |
721 | return TRACE_TYPE_PARTIAL_LINE; | |
722 | } | |
723 | ||
ae7462b4 | 724 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags) |
f633cef0 SR |
725 | { |
726 | struct ftrace_entry *field; | |
727 | ||
2c9b238e | 728 | trace_assign_type(field, iter->ent); |
f633cef0 | 729 | |
2c9b238e | 730 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
731 | field->ip, |
732 | field->parent_ip)) | |
f633cef0 SR |
733 | return TRACE_TYPE_PARTIAL_LINE; |
734 | ||
d9793bd8 | 735 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
736 | } |
737 | ||
ae7462b4 | 738 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags) |
f633cef0 SR |
739 | { |
740 | struct ftrace_entry *field; | |
2c9b238e | 741 | struct trace_seq *s = &iter->seq; |
f633cef0 | 742 | |
2c9b238e | 743 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
744 | |
745 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
746 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
747 | ||
d9793bd8 | 748 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
749 | } |
750 | ||
ae7462b4 | 751 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags) |
f633cef0 SR |
752 | { |
753 | struct ftrace_entry *field; | |
2c9b238e | 754 | struct trace_seq *s = &iter->seq; |
f633cef0 | 755 | |
2c9b238e | 756 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
757 | |
758 | SEQ_PUT_FIELD_RET(s, field->ip); | |
759 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
760 | ||
d9793bd8 | 761 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
762 | } |
763 | ||
764 | static struct trace_event trace_fn_event = { | |
ef18012b | 765 | .type = TRACE_FN, |
f633cef0 | 766 | .trace = trace_fn_trace, |
f633cef0 SR |
767 | .raw = trace_fn_raw, |
768 | .hex = trace_fn_hex, | |
769 | .binary = trace_fn_bin, | |
770 | }; | |
771 | ||
772 | /* TRACE_CTX an TRACE_WAKE */ | |
ae7462b4 ACM |
773 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
774 | char *delim) | |
f633cef0 SR |
775 | { |
776 | struct ctx_switch_entry *field; | |
4ca53085 | 777 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
778 | int S, T; |
779 | ||
4ca53085 | 780 | |
2c9b238e | 781 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
782 | |
783 | T = task_state_char(field->next_state); | |
784 | S = task_state_char(field->prev_state); | |
4ca53085 | 785 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
786 | if (!trace_seq_printf(&iter->seq, |
787 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
788 | field->prev_pid, |
789 | field->prev_prio, | |
790 | S, delim, | |
791 | field->next_cpu, | |
792 | field->next_pid, | |
793 | field->next_prio, | |
794 | T, comm)) | |
f633cef0 SR |
795 | return TRACE_TYPE_PARTIAL_LINE; |
796 | ||
d9793bd8 | 797 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
798 | } |
799 | ||
ae7462b4 | 800 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags) |
f633cef0 | 801 | { |
2c9b238e | 802 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
803 | } |
804 | ||
ae7462b4 ACM |
805 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
806 | int flags) | |
f633cef0 | 807 | { |
2c9b238e | 808 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
809 | } |
810 | ||
2c9b238e | 811 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
812 | { |
813 | struct ctx_switch_entry *field; | |
814 | int T; | |
815 | ||
2c9b238e | 816 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
817 | |
818 | if (!S) | |
819 | task_state_char(field->prev_state); | |
820 | T = task_state_char(field->next_state); | |
2c9b238e | 821 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
822 | field->prev_pid, |
823 | field->prev_prio, | |
824 | S, | |
825 | field->next_cpu, | |
826 | field->next_pid, | |
827 | field->next_prio, | |
828 | T)) | |
f633cef0 SR |
829 | return TRACE_TYPE_PARTIAL_LINE; |
830 | ||
d9793bd8 | 831 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
832 | } |
833 | ||
ae7462b4 | 834 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 835 | { |
2c9b238e | 836 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
837 | } |
838 | ||
ae7462b4 | 839 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 840 | { |
2c9b238e | 841 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
842 | } |
843 | ||
844 | ||
2c9b238e | 845 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
846 | { |
847 | struct ctx_switch_entry *field; | |
2c9b238e | 848 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
849 | int T; |
850 | ||
2c9b238e | 851 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
852 | |
853 | if (!S) | |
854 | task_state_char(field->prev_state); | |
855 | T = task_state_char(field->next_state); | |
856 | ||
857 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
858 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
859 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
860 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
861 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
862 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
863 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
864 | ||
d9793bd8 | 865 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
866 | } |
867 | ||
ae7462b4 | 868 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 869 | { |
2c9b238e | 870 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
871 | } |
872 | ||
ae7462b4 | 873 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 874 | { |
2c9b238e | 875 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
876 | } |
877 | ||
ae7462b4 ACM |
878 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
879 | int flags) | |
f633cef0 SR |
880 | { |
881 | struct ctx_switch_entry *field; | |
2c9b238e | 882 | struct trace_seq *s = &iter->seq; |
f633cef0 | 883 | |
2c9b238e | 884 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
885 | |
886 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
887 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
888 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
889 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
890 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
891 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
892 | ||
d9793bd8 | 893 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
894 | } |
895 | ||
896 | static struct trace_event trace_ctx_event = { | |
ef18012b | 897 | .type = TRACE_CTX, |
f633cef0 | 898 | .trace = trace_ctx_print, |
f633cef0 SR |
899 | .raw = trace_ctx_raw, |
900 | .hex = trace_ctx_hex, | |
901 | .binary = trace_ctxwake_bin, | |
902 | }; | |
903 | ||
904 | static struct trace_event trace_wake_event = { | |
ef18012b | 905 | .type = TRACE_WAKE, |
f633cef0 | 906 | .trace = trace_wake_print, |
f633cef0 SR |
907 | .raw = trace_wake_raw, |
908 | .hex = trace_wake_hex, | |
909 | .binary = trace_ctxwake_bin, | |
910 | }; | |
911 | ||
912 | /* TRACE_SPECIAL */ | |
ae7462b4 ACM |
913 | static enum print_line_t trace_special_print(struct trace_iterator *iter, |
914 | int flags) | |
f633cef0 SR |
915 | { |
916 | struct special_entry *field; | |
917 | ||
2c9b238e | 918 | trace_assign_type(field, iter->ent); |
f633cef0 | 919 | |
2c9b238e | 920 | if (!trace_seq_printf(&iter->seq, "# %ld %ld %ld\n", |
6c1a99af LJ |
921 | field->arg1, |
922 | field->arg2, | |
923 | field->arg3)) | |
f633cef0 SR |
924 | return TRACE_TYPE_PARTIAL_LINE; |
925 | ||
d9793bd8 | 926 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
927 | } |
928 | ||
ae7462b4 ACM |
929 | static enum print_line_t trace_special_hex(struct trace_iterator *iter, |
930 | int flags) | |
f633cef0 SR |
931 | { |
932 | struct special_entry *field; | |
2c9b238e | 933 | struct trace_seq *s = &iter->seq; |
f633cef0 | 934 | |
2c9b238e | 935 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
936 | |
937 | SEQ_PUT_HEX_FIELD_RET(s, field->arg1); | |
938 | SEQ_PUT_HEX_FIELD_RET(s, field->arg2); | |
939 | SEQ_PUT_HEX_FIELD_RET(s, field->arg3); | |
940 | ||
d9793bd8 | 941 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
942 | } |
943 | ||
ae7462b4 ACM |
944 | static enum print_line_t trace_special_bin(struct trace_iterator *iter, |
945 | int flags) | |
f633cef0 SR |
946 | { |
947 | struct special_entry *field; | |
2c9b238e | 948 | struct trace_seq *s = &iter->seq; |
f633cef0 | 949 | |
2c9b238e | 950 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
951 | |
952 | SEQ_PUT_FIELD_RET(s, field->arg1); | |
953 | SEQ_PUT_FIELD_RET(s, field->arg2); | |
954 | SEQ_PUT_FIELD_RET(s, field->arg3); | |
955 | ||
d9793bd8 | 956 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
957 | } |
958 | ||
959 | static struct trace_event trace_special_event = { | |
ef18012b | 960 | .type = TRACE_SPECIAL, |
f633cef0 | 961 | .trace = trace_special_print, |
f633cef0 SR |
962 | .raw = trace_special_print, |
963 | .hex = trace_special_hex, | |
964 | .binary = trace_special_bin, | |
965 | }; | |
966 | ||
967 | /* TRACE_STACK */ | |
968 | ||
ae7462b4 ACM |
969 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
970 | int flags) | |
f633cef0 SR |
971 | { |
972 | struct stack_entry *field; | |
2c9b238e | 973 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
974 | int i; |
975 | ||
2c9b238e | 976 | trace_assign_type(field, iter->ent); |
f633cef0 | 977 | |
f11b3f4e | 978 | if (!trace_seq_puts(s, "\n")) |
979 | goto partial; | |
f633cef0 | 980 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { |
f11b3f4e | 981 | if (!field->caller[i] || (field->caller[i] == ULONG_MAX)) |
1ec7c484 | 982 | break; |
f11b3f4e | 983 | if (!trace_seq_puts(s, " => ")) |
984 | goto partial; | |
f633cef0 | 985 | |
f11b3f4e | 986 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
987 | goto partial; | |
6c1a99af | 988 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
989 | goto partial; |
990 | } | |
991 | ||
d9793bd8 | 992 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
993 | |
994 | partial: | |
995 | return TRACE_TYPE_PARTIAL_LINE; | |
996 | } | |
997 | ||
998 | static struct trace_event trace_stack_event = { | |
ef18012b | 999 | .type = TRACE_STACK, |
f633cef0 | 1000 | .trace = trace_stack_print, |
f633cef0 SR |
1001 | .raw = trace_special_print, |
1002 | .hex = trace_special_hex, | |
1003 | .binary = trace_special_bin, | |
1004 | }; | |
1005 | ||
1006 | /* TRACE_USER_STACK */ | |
ae7462b4 ACM |
1007 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
1008 | int flags) | |
f633cef0 SR |
1009 | { |
1010 | struct userstack_entry *field; | |
2c9b238e | 1011 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1012 | |
2c9b238e | 1013 | trace_assign_type(field, iter->ent); |
f633cef0 | 1014 | |
6c1a99af | 1015 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1016 | goto partial; |
1017 | ||
6c1a99af | 1018 | if (!trace_seq_putc(s, '\n')) |
f633cef0 SR |
1019 | goto partial; |
1020 | ||
d9793bd8 | 1021 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1022 | |
1023 | partial: | |
1024 | return TRACE_TYPE_PARTIAL_LINE; | |
1025 | } | |
1026 | ||
1027 | static struct trace_event trace_user_stack_event = { | |
ef18012b | 1028 | .type = TRACE_USER_STACK, |
f633cef0 | 1029 | .trace = trace_user_stack_print, |
f633cef0 SR |
1030 | .raw = trace_special_print, |
1031 | .hex = trace_special_hex, | |
1032 | .binary = trace_special_bin, | |
1033 | }; | |
1034 | ||
48ead020 | 1035 | /* TRACE_BPRINT */ |
1427cdf0 | 1036 | static enum print_line_t |
48ead020 | 1037 | trace_bprint_print(struct trace_iterator *iter, int flags) |
1427cdf0 LJ |
1038 | { |
1039 | struct trace_entry *entry = iter->ent; | |
1040 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1041 | struct bprint_entry *field; |
1427cdf0 LJ |
1042 | |
1043 | trace_assign_type(field, entry); | |
1044 | ||
1045 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1046 | goto partial; | |
1047 | ||
1048 | if (!trace_seq_puts(s, ": ")) | |
1049 | goto partial; | |
1050 | ||
1051 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1052 | goto partial; | |
1053 | ||
1054 | return TRACE_TYPE_HANDLED; | |
1055 | ||
1056 | partial: | |
1057 | return TRACE_TYPE_PARTIAL_LINE; | |
1058 | } | |
1059 | ||
769b0441 | 1060 | |
48ead020 FW |
1061 | static enum print_line_t |
1062 | trace_bprint_raw(struct trace_iterator *iter, int flags) | |
1427cdf0 | 1063 | { |
48ead020 | 1064 | struct bprint_entry *field; |
1427cdf0 | 1065 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1066 | |
769b0441 | 1067 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1068 | |
1069 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1070 | goto partial; | |
1071 | ||
1072 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1073 | goto partial; | |
1074 | ||
1075 | return TRACE_TYPE_HANDLED; | |
1076 | ||
1077 | partial: | |
1078 | return TRACE_TYPE_PARTIAL_LINE; | |
1079 | } | |
1080 | ||
769b0441 | 1081 | |
48ead020 FW |
1082 | static struct trace_event trace_bprint_event = { |
1083 | .type = TRACE_BPRINT, | |
1084 | .trace = trace_bprint_print, | |
1085 | .raw = trace_bprint_raw, | |
1086 | }; | |
1087 | ||
1088 | /* TRACE_PRINT */ | |
1089 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
1090 | int flags) | |
1091 | { | |
1092 | struct print_entry *field; | |
1093 | struct trace_seq *s = &iter->seq; | |
1094 | ||
1095 | trace_assign_type(field, iter->ent); | |
1096 | ||
1097 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1098 | goto partial; | |
1099 | ||
1100 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1101 | goto partial; | |
1102 | ||
1103 | return TRACE_TYPE_HANDLED; | |
1104 | ||
1105 | partial: | |
1106 | return TRACE_TYPE_PARTIAL_LINE; | |
1107 | } | |
1108 | ||
1109 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags) | |
1110 | { | |
1111 | struct print_entry *field; | |
1112 | ||
1113 | trace_assign_type(field, iter->ent); | |
1114 | ||
1115 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1116 | goto partial; | |
1117 | ||
1118 | return TRACE_TYPE_HANDLED; | |
1119 | ||
1120 | partial: | |
1121 | return TRACE_TYPE_PARTIAL_LINE; | |
1122 | } | |
1123 | ||
769b0441 | 1124 | static struct trace_event trace_print_event = { |
48ead020 | 1125 | .type = TRACE_PRINT, |
769b0441 FW |
1126 | .trace = trace_print_print, |
1127 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1128 | }; |
1129 | ||
48ead020 | 1130 | |
f633cef0 SR |
1131 | static struct trace_event *events[] __initdata = { |
1132 | &trace_fn_event, | |
1133 | &trace_ctx_event, | |
1134 | &trace_wake_event, | |
1135 | &trace_special_event, | |
1136 | &trace_stack_event, | |
1137 | &trace_user_stack_event, | |
48ead020 | 1138 | &trace_bprint_event, |
f633cef0 SR |
1139 | &trace_print_event, |
1140 | NULL | |
1141 | }; | |
1142 | ||
1143 | __init static int init_events(void) | |
1144 | { | |
1145 | struct trace_event *event; | |
1146 | int i, ret; | |
1147 | ||
1148 | for (i = 0; events[i]; i++) { | |
1149 | event = events[i]; | |
1150 | ||
1151 | ret = register_ftrace_event(event); | |
1152 | if (!ret) { | |
1153 | printk(KERN_WARNING "event %d failed to register\n", | |
1154 | event->type); | |
1155 | WARN_ON_ONCE(1); | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | device_initcall(init_events); |