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 | ||
110bf2b7 | 17 | DECLARE_RWSEM(trace_event_mutex); |
be74b73a | 18 | |
f0868d1e SR |
19 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; |
20 | ||
21 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
22 | ||
a63ce5b3 | 23 | int trace_print_seq(struct seq_file *m, struct trace_seq *s) |
0706f1c4 SR |
24 | { |
25 | int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len; | |
a63ce5b3 SR |
26 | int ret; |
27 | ||
28 | ret = seq_write(m, s->buffer, len); | |
0706f1c4 | 29 | |
a63ce5b3 SR |
30 | /* |
31 | * Only reset this buffer if we successfully wrote to the | |
32 | * seq_file buffer. | |
33 | */ | |
34 | if (!ret) | |
35 | trace_seq_init(s); | |
0706f1c4 | 36 | |
a63ce5b3 | 37 | return ret; |
0706f1c4 SR |
38 | } |
39 | ||
5ef841f6 SR |
40 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
41 | { | |
42 | struct trace_seq *s = &iter->seq; | |
43 | struct trace_entry *entry = iter->ent; | |
44 | struct bprint_entry *field; | |
45 | int ret; | |
46 | ||
47 | trace_assign_type(field, entry); | |
48 | ||
49 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
50 | if (!ret) | |
51 | return TRACE_TYPE_PARTIAL_LINE; | |
52 | ||
53 | return TRACE_TYPE_HANDLED; | |
54 | } | |
55 | ||
56 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
57 | { | |
58 | struct trace_seq *s = &iter->seq; | |
59 | struct trace_entry *entry = iter->ent; | |
60 | struct print_entry *field; | |
61 | int ret; | |
62 | ||
63 | trace_assign_type(field, entry); | |
64 | ||
65 | ret = trace_seq_printf(s, "%s", field->buf); | |
66 | if (!ret) | |
67 | return TRACE_TYPE_PARTIAL_LINE; | |
68 | ||
69 | return TRACE_TYPE_HANDLED; | |
70 | } | |
71 | ||
f0868d1e SR |
72 | /** |
73 | * trace_seq_printf - sequence printing of trace information | |
74 | * @s: trace sequence descriptor | |
75 | * @fmt: printf format string | |
76 | * | |
3e69533b JO |
77 | * It returns 0 if the trace oversizes the buffer's free |
78 | * space, 1 otherwise. | |
79 | * | |
f0868d1e SR |
80 | * The tracer may use either sequence operations or its own |
81 | * copy to user routines. To simplify formating of a trace | |
82 | * trace_seq_printf is used to store strings into a special | |
83 | * buffer (@s). Then the output may be either used by | |
84 | * the sequencer or pulled into another buffer. | |
85 | */ | |
86 | int | |
87 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
88 | { | |
89 | int len = (PAGE_SIZE - 1) - s->len; | |
90 | va_list ap; | |
91 | int ret; | |
92 | ||
d184b31c | 93 | if (s->full || !len) |
f0868d1e SR |
94 | return 0; |
95 | ||
96 | va_start(ap, fmt); | |
97 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
98 | va_end(ap); | |
99 | ||
100 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
101 | if (ret >= len) { |
102 | s->full = 1; | |
f0868d1e | 103 | return 0; |
d184b31c | 104 | } |
f0868d1e SR |
105 | |
106 | s->len += ret; | |
107 | ||
3e69533b | 108 | return 1; |
f0868d1e | 109 | } |
17c873ec | 110 | EXPORT_SYMBOL_GPL(trace_seq_printf); |
f0868d1e | 111 | |
725c624a SR |
112 | /** |
113 | * trace_seq_vprintf - sequence printing of trace information | |
114 | * @s: trace sequence descriptor | |
115 | * @fmt: printf format string | |
116 | * | |
117 | * The tracer may use either sequence operations or its own | |
118 | * copy to user routines. To simplify formating of a trace | |
119 | * trace_seq_printf is used to store strings into a special | |
120 | * buffer (@s). Then the output may be either used by | |
121 | * the sequencer or pulled into another buffer. | |
122 | */ | |
123 | int | |
124 | trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) | |
125 | { | |
126 | int len = (PAGE_SIZE - 1) - s->len; | |
127 | int ret; | |
128 | ||
d184b31c | 129 | if (s->full || !len) |
725c624a SR |
130 | return 0; |
131 | ||
132 | ret = vsnprintf(s->buffer + s->len, len, fmt, args); | |
133 | ||
134 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
135 | if (ret >= len) { |
136 | s->full = 1; | |
725c624a | 137 | return 0; |
d184b31c | 138 | } |
725c624a SR |
139 | |
140 | s->len += ret; | |
141 | ||
142 | return len; | |
143 | } | |
144 | EXPORT_SYMBOL_GPL(trace_seq_vprintf); | |
145 | ||
769b0441 | 146 | int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
1427cdf0 LJ |
147 | { |
148 | int len = (PAGE_SIZE - 1) - s->len; | |
149 | int ret; | |
150 | ||
d184b31c | 151 | if (s->full || !len) |
1427cdf0 LJ |
152 | return 0; |
153 | ||
154 | ret = bstr_printf(s->buffer + s->len, len, fmt, binary); | |
155 | ||
156 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
157 | if (ret >= len) { |
158 | s->full = 1; | |
1427cdf0 | 159 | return 0; |
d184b31c | 160 | } |
1427cdf0 LJ |
161 | |
162 | s->len += ret; | |
163 | ||
164 | return len; | |
165 | } | |
166 | ||
f0868d1e SR |
167 | /** |
168 | * trace_seq_puts - trace sequence printing of simple string | |
169 | * @s: trace sequence descriptor | |
170 | * @str: simple string to record | |
171 | * | |
172 | * The tracer may use either the sequence operations or its own | |
173 | * copy to user routines. This function records a simple string | |
174 | * into a special buffer (@s) for later retrieval by a sequencer | |
175 | * or other mechanism. | |
176 | */ | |
177 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
178 | { | |
179 | int len = strlen(str); | |
180 | ||
d184b31c | 181 | if (s->full) |
f0868d1e SR |
182 | return 0; |
183 | ||
d184b31c JB |
184 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
185 | s->full = 1; | |
186 | return 0; | |
187 | } | |
188 | ||
f0868d1e SR |
189 | memcpy(s->buffer + s->len, str, len); |
190 | s->len += len; | |
191 | ||
192 | return len; | |
193 | } | |
194 | ||
195 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
196 | { | |
d184b31c | 197 | if (s->full) |
f0868d1e SR |
198 | return 0; |
199 | ||
d184b31c JB |
200 | if (s->len >= (PAGE_SIZE - 1)) { |
201 | s->full = 1; | |
202 | return 0; | |
203 | } | |
204 | ||
f0868d1e SR |
205 | s->buffer[s->len++] = c; |
206 | ||
207 | return 1; | |
208 | } | |
bf816235 | 209 | EXPORT_SYMBOL(trace_seq_putc); |
f0868d1e | 210 | |
b14b70a6 | 211 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e | 212 | { |
d184b31c | 213 | if (s->full) |
f0868d1e SR |
214 | return 0; |
215 | ||
d184b31c JB |
216 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
217 | s->full = 1; | |
218 | return 0; | |
219 | } | |
220 | ||
f0868d1e SR |
221 | memcpy(s->buffer + s->len, mem, len); |
222 | s->len += len; | |
223 | ||
224 | return len; | |
225 | } | |
226 | ||
b14b70a6 | 227 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
228 | { |
229 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 230 | const unsigned char *data = mem; |
f0868d1e SR |
231 | int i, j; |
232 | ||
d184b31c JB |
233 | if (s->full) |
234 | return 0; | |
235 | ||
f0868d1e SR |
236 | #ifdef __BIG_ENDIAN |
237 | for (i = 0, j = 0; i < len; i++) { | |
238 | #else | |
239 | for (i = len-1, j = 0; i >= 0; i--) { | |
240 | #endif | |
241 | hex[j++] = hex_asc_hi(data[i]); | |
242 | hex[j++] = hex_asc_lo(data[i]); | |
243 | } | |
244 | hex[j++] = ' '; | |
245 | ||
246 | return trace_seq_putmem(s, hex, j); | |
247 | } | |
248 | ||
bdd6df6a EGM |
249 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
250 | { | |
251 | void *ret; | |
252 | ||
d184b31c | 253 | if (s->full) |
668eb65f | 254 | return NULL; |
d184b31c JB |
255 | |
256 | if (len > ((PAGE_SIZE - 1) - s->len)) { | |
257 | s->full = 1; | |
bdd6df6a | 258 | return NULL; |
d184b31c | 259 | } |
bdd6df6a EGM |
260 | |
261 | ret = s->buffer + s->len; | |
262 | s->len += len; | |
263 | ||
264 | return ret; | |
265 | } | |
266 | ||
38eff289 | 267 | int trace_seq_path(struct trace_seq *s, const struct path *path) |
f0868d1e SR |
268 | { |
269 | unsigned char *p; | |
270 | ||
d184b31c | 271 | if (s->full) |
f0868d1e | 272 | return 0; |
d184b31c JB |
273 | |
274 | if (s->len >= (PAGE_SIZE - 1)) { | |
275 | s->full = 1; | |
276 | return 0; | |
277 | } | |
278 | ||
f0868d1e SR |
279 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); |
280 | if (!IS_ERR(p)) { | |
281 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
282 | if (p) { | |
283 | s->len = p - s->buffer; | |
284 | return 1; | |
285 | } | |
286 | } else { | |
287 | s->buffer[s->len++] = '?'; | |
288 | return 1; | |
289 | } | |
290 | ||
d184b31c | 291 | s->full = 1; |
f0868d1e SR |
292 | return 0; |
293 | } | |
294 | ||
be74b73a SR |
295 | const char * |
296 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
297 | unsigned long flags, | |
298 | const struct trace_print_flags *flag_array) | |
299 | { | |
300 | unsigned long mask; | |
301 | const char *str; | |
56d8bd3f | 302 | const char *ret = p->buffer + p->len; |
e404b321 | 303 | int i, first = 1; |
be74b73a | 304 | |
be74b73a SR |
305 | for (i = 0; flag_array[i].name && flags; i++) { |
306 | ||
307 | mask = flag_array[i].mask; | |
308 | if ((flags & mask) != mask) | |
309 | continue; | |
310 | ||
311 | str = flag_array[i].name; | |
312 | flags &= ~mask; | |
e404b321 | 313 | if (!first && delim) |
be74b73a | 314 | trace_seq_puts(p, delim); |
e404b321 AV |
315 | else |
316 | first = 0; | |
be74b73a SR |
317 | trace_seq_puts(p, str); |
318 | } | |
319 | ||
320 | /* check for left over flags */ | |
321 | if (flags) { | |
5b349261 | 322 | if (!first && delim) |
be74b73a SR |
323 | trace_seq_puts(p, delim); |
324 | trace_seq_printf(p, "0x%lx", flags); | |
325 | } | |
326 | ||
327 | trace_seq_putc(p, 0); | |
328 | ||
56d8bd3f | 329 | return ret; |
be74b73a | 330 | } |
ec081ddc | 331 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 332 | |
0f4fc29d SR |
333 | const char * |
334 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
335 | const struct trace_print_flags *symbol_array) | |
336 | { | |
337 | int i; | |
56d8bd3f | 338 | const char *ret = p->buffer + p->len; |
0f4fc29d SR |
339 | |
340 | for (i = 0; symbol_array[i].name; i++) { | |
341 | ||
342 | if (val != symbol_array[i].mask) | |
343 | continue; | |
344 | ||
345 | trace_seq_puts(p, symbol_array[i].name); | |
346 | break; | |
347 | } | |
348 | ||
5b349261 | 349 | if (ret == (const char *)(p->buffer + p->len)) |
0f4fc29d SR |
350 | trace_seq_printf(p, "0x%lx", val); |
351 | ||
352 | trace_seq_putc(p, 0); | |
353 | ||
56d8bd3f | 354 | return ret; |
0f4fc29d | 355 | } |
ec081ddc | 356 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 357 | |
2fc1b6f0 | 358 | #if BITS_PER_LONG == 32 |
359 | const char * | |
360 | ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, | |
361 | const struct trace_print_flags_u64 *symbol_array) | |
362 | { | |
363 | int i; | |
364 | const char *ret = p->buffer + p->len; | |
365 | ||
366 | for (i = 0; symbol_array[i].name; i++) { | |
367 | ||
368 | if (val != symbol_array[i].mask) | |
369 | continue; | |
370 | ||
371 | trace_seq_puts(p, symbol_array[i].name); | |
372 | break; | |
373 | } | |
374 | ||
5b349261 | 375 | if (ret == (const char *)(p->buffer + p->len)) |
2fc1b6f0 | 376 | trace_seq_printf(p, "0x%llx", val); |
377 | ||
378 | trace_seq_putc(p, 0); | |
379 | ||
380 | return ret; | |
381 | } | |
382 | EXPORT_SYMBOL(ftrace_print_symbols_seq_u64); | |
383 | #endif | |
384 | ||
5a2e3995 KT |
385 | const char * |
386 | ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) | |
387 | { | |
388 | int i; | |
389 | const char *ret = p->buffer + p->len; | |
390 | ||
391 | for (i = 0; i < buf_len; i++) | |
392 | trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]); | |
393 | ||
394 | trace_seq_putc(p, 0); | |
395 | ||
396 | return ret; | |
397 | } | |
398 | EXPORT_SYMBOL(ftrace_print_hex_seq); | |
399 | ||
f0868d1e SR |
400 | #ifdef CONFIG_KRETPROBES |
401 | static inline const char *kretprobed(const char *name) | |
402 | { | |
403 | static const char tramp_name[] = "kretprobe_trampoline"; | |
404 | int size = sizeof(tramp_name); | |
405 | ||
406 | if (strncmp(tramp_name, name, size) == 0) | |
407 | return "[unknown/kretprobe'd]"; | |
408 | return name; | |
409 | } | |
410 | #else | |
411 | static inline const char *kretprobed(const char *name) | |
412 | { | |
413 | return name; | |
414 | } | |
415 | #endif /* CONFIG_KRETPROBES */ | |
416 | ||
417 | static int | |
418 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
419 | { | |
420 | #ifdef CONFIG_KALLSYMS | |
421 | char str[KSYM_SYMBOL_LEN]; | |
422 | const char *name; | |
423 | ||
424 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
425 | ||
426 | name = kretprobed(str); | |
427 | ||
428 | return trace_seq_printf(s, fmt, name); | |
429 | #endif | |
430 | return 1; | |
431 | } | |
432 | ||
433 | static int | |
434 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
435 | unsigned long address) | |
436 | { | |
437 | #ifdef CONFIG_KALLSYMS | |
438 | char str[KSYM_SYMBOL_LEN]; | |
439 | const char *name; | |
440 | ||
441 | sprint_symbol(str, address); | |
442 | name = kretprobed(str); | |
443 | ||
444 | return trace_seq_printf(s, fmt, name); | |
445 | #endif | |
446 | return 1; | |
447 | } | |
448 | ||
449 | #ifndef CONFIG_64BIT | |
450 | # define IP_FMT "%08lx" | |
451 | #else | |
452 | # define IP_FMT "%016lx" | |
453 | #endif | |
454 | ||
455 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
456 | unsigned long ip, unsigned long sym_flags) | |
457 | { | |
458 | struct file *file = NULL; | |
459 | unsigned long vmstart = 0; | |
460 | int ret = 1; | |
461 | ||
d184b31c JB |
462 | if (s->full) |
463 | return 0; | |
464 | ||
f0868d1e SR |
465 | if (mm) { |
466 | const struct vm_area_struct *vma; | |
467 | ||
468 | down_read(&mm->mmap_sem); | |
469 | vma = find_vma(mm, ip); | |
470 | if (vma) { | |
471 | file = vma->vm_file; | |
472 | vmstart = vma->vm_start; | |
473 | } | |
474 | if (file) { | |
475 | ret = trace_seq_path(s, &file->f_path); | |
476 | if (ret) | |
477 | ret = trace_seq_printf(s, "[+0x%lx]", | |
478 | ip - vmstart); | |
479 | } | |
480 | up_read(&mm->mmap_sem); | |
481 | } | |
482 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
483 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
484 | return ret; | |
485 | } | |
486 | ||
487 | int | |
488 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
489 | unsigned long sym_flags) | |
490 | { | |
491 | struct mm_struct *mm = NULL; | |
492 | int ret = 1; | |
493 | unsigned int i; | |
494 | ||
495 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
496 | struct task_struct *task; | |
497 | /* | |
498 | * we do the lookup on the thread group leader, | |
499 | * since individual threads might have already quit! | |
500 | */ | |
501 | rcu_read_lock(); | |
48659d31 | 502 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
503 | if (task) |
504 | mm = get_task_mm(task); | |
505 | rcu_read_unlock(); | |
506 | } | |
507 | ||
508 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
509 | unsigned long ip = entry->caller[i]; | |
510 | ||
511 | if (ip == ULONG_MAX || !ret) | |
512 | break; | |
048dc50c | 513 | if (ret) |
514 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
515 | if (!ip) { |
516 | if (ret) | |
517 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 518 | if (ret) |
519 | ret = trace_seq_puts(s, "\n"); | |
f0868d1e SR |
520 | continue; |
521 | } | |
522 | if (!ret) | |
523 | break; | |
524 | if (ret) | |
525 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
048dc50c | 526 | ret = trace_seq_puts(s, "\n"); |
f0868d1e SR |
527 | } |
528 | ||
529 | if (mm) | |
530 | mmput(mm); | |
531 | return ret; | |
532 | } | |
533 | ||
534 | int | |
535 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
536 | { | |
537 | int ret; | |
538 | ||
539 | if (!ip) | |
540 | return trace_seq_printf(s, "0"); | |
541 | ||
542 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
543 | ret = seq_print_sym_offset(s, "%s", ip); | |
544 | else | |
545 | ret = seq_print_sym_short(s, "%s", ip); | |
546 | ||
547 | if (!ret) | |
548 | return 0; | |
549 | ||
550 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
551 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
552 | return ret; | |
553 | } | |
554 | ||
f81c972d SR |
555 | /** |
556 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
557 | * @s: trace seq struct to write to | |
558 | * @entry: The trace entry field from the ring buffer | |
559 | * | |
560 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 561 | * count. |
f81c972d SR |
562 | */ |
563 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 564 | { |
10da37a6 DS |
565 | char hardsoft_irq; |
566 | char need_resched; | |
567 | char irqs_off; | |
568 | int hardirq; | |
569 | int softirq; | |
637e7e86 | 570 | int ret; |
c4a8e8be | 571 | |
c4a8e8be FW |
572 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
573 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 574 | |
10da37a6 DS |
575 | irqs_off = |
576 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
577 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
578 | '.'; | |
579 | need_resched = | |
580 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'; | |
581 | hardsoft_irq = | |
582 | (hardirq && softirq) ? 'H' : | |
583 | hardirq ? 'h' : | |
584 | softirq ? 's' : | |
585 | '.'; | |
586 | ||
f81c972d | 587 | if (!trace_seq_printf(s, "%c%c%c", |
10da37a6 | 588 | irqs_off, need_resched, hardsoft_irq)) |
d9793bd8 | 589 | return 0; |
c4a8e8be | 590 | |
829b876d SR |
591 | if (entry->preempt_count) |
592 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 593 | else |
829b876d SR |
594 | ret = trace_seq_putc(s, '.'); |
595 | ||
e6e1e259 | 596 | return ret; |
c4a8e8be FW |
597 | } |
598 | ||
f81c972d SR |
599 | static int |
600 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
601 | { | |
602 | char comm[TASK_COMM_LEN]; | |
603 | ||
604 | trace_find_cmdline(entry->pid, comm); | |
605 | ||
606 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
607 | comm, entry->pid, cpu)) | |
608 | return 0; | |
609 | ||
610 | return trace_print_lat_fmt(s, entry); | |
611 | } | |
612 | ||
8be0709f | 613 | static unsigned long preempt_mark_thresh_us = 100; |
c4a8e8be | 614 | |
d9793bd8 | 615 | static int |
8be0709f | 616 | lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
c4a8e8be | 617 | { |
8be0709f DS |
618 | unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE; |
619 | unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; | |
620 | unsigned long long abs_ts = iter->ts - iter->tr->time_start; | |
621 | unsigned long long rel_ts = next_ts - iter->ts; | |
622 | struct trace_seq *s = &iter->seq; | |
623 | ||
624 | if (in_ns) { | |
625 | abs_ts = ns2usecs(abs_ts); | |
626 | rel_ts = ns2usecs(rel_ts); | |
627 | } | |
628 | ||
629 | if (verbose && in_ns) { | |
630 | unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); | |
631 | unsigned long abs_msec = (unsigned long)abs_ts; | |
632 | unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); | |
633 | unsigned long rel_msec = (unsigned long)rel_ts; | |
634 | ||
635 | return trace_seq_printf( | |
636 | s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", | |
637 | ns2usecs(iter->ts), | |
638 | abs_msec, abs_usec, | |
639 | rel_msec, rel_usec); | |
640 | } else if (verbose && !in_ns) { | |
641 | return trace_seq_printf( | |
642 | s, "[%016llx] %lld (+%lld): ", | |
643 | iter->ts, abs_ts, rel_ts); | |
644 | } else if (!verbose && in_ns) { | |
645 | return trace_seq_printf( | |
646 | s, " %4lldus%c: ", | |
647 | abs_ts, | |
648 | rel_ts > preempt_mark_thresh_us ? '!' : | |
649 | rel_ts > 1 ? '+' : ' '); | |
650 | } else { /* !verbose && !in_ns */ | |
651 | return trace_seq_printf(s, " %4lld: ", abs_ts); | |
652 | } | |
c4a8e8be FW |
653 | } |
654 | ||
655 | int trace_print_context(struct trace_iterator *iter) | |
656 | { | |
657 | struct trace_seq *s = &iter->seq; | |
658 | struct trace_entry *entry = iter->ent; | |
8be0709f DS |
659 | unsigned long long t; |
660 | unsigned long secs, usec_rem; | |
4ca53085 | 661 | char comm[TASK_COMM_LEN]; |
77271ce4 | 662 | int ret; |
4ca53085 SR |
663 | |
664 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 665 | |
77271ce4 SR |
666 | ret = trace_seq_printf(s, "%16s-%-5d [%03d] ", |
667 | comm, entry->pid, iter->cpu); | |
668 | if (!ret) | |
669 | return 0; | |
670 | ||
671 | if (trace_flags & TRACE_ITER_IRQ_INFO) { | |
672 | ret = trace_print_lat_fmt(s, entry); | |
673 | if (!ret) | |
674 | return 0; | |
675 | } | |
676 | ||
8be0709f DS |
677 | if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { |
678 | t = ns2usecs(iter->ts); | |
679 | usec_rem = do_div(t, USEC_PER_SEC); | |
680 | secs = (unsigned long)t; | |
681 | return trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); | |
682 | } else | |
683 | return trace_seq_printf(s, " %12llu: ", iter->ts); | |
c4a8e8be FW |
684 | } |
685 | ||
686 | int trace_print_lat_context(struct trace_iterator *iter) | |
687 | { | |
688 | u64 next_ts; | |
d9793bd8 | 689 | int ret; |
db4c75cb SR |
690 | /* trace_find_next_entry will reset ent_size */ |
691 | int ent_size = iter->ent_size; | |
c4a8e8be FW |
692 | struct trace_seq *s = &iter->seq; |
693 | struct trace_entry *entry = iter->ent, | |
694 | *next_entry = trace_find_next_entry(iter, NULL, | |
695 | &next_ts); | |
696 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
c4a8e8be | 697 | |
db4c75cb SR |
698 | /* Restore the original ent_size */ |
699 | iter->ent_size = ent_size; | |
700 | ||
c4a8e8be FW |
701 | if (!next_entry) |
702 | next_ts = iter->ts; | |
c4a8e8be FW |
703 | |
704 | if (verbose) { | |
4ca53085 SR |
705 | char comm[TASK_COMM_LEN]; |
706 | ||
707 | trace_find_cmdline(entry->pid, comm); | |
708 | ||
8be0709f DS |
709 | ret = trace_seq_printf( |
710 | s, "%16s %5d %3d %d %08x %08lx ", | |
711 | comm, entry->pid, iter->cpu, entry->flags, | |
712 | entry->preempt_count, iter->idx); | |
c4a8e8be | 713 | } else { |
1830b52d | 714 | ret = lat_print_generic(s, entry, iter->cpu); |
c4a8e8be FW |
715 | } |
716 | ||
8be0709f DS |
717 | if (ret) |
718 | ret = lat_print_timestamp(iter, next_ts); | |
719 | ||
d9793bd8 | 720 | return ret; |
c4a8e8be FW |
721 | } |
722 | ||
f633cef0 SR |
723 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
724 | ||
725 | static int task_state_char(unsigned long state) | |
726 | { | |
727 | int bit = state ? __ffs(state) + 1 : 0; | |
728 | ||
729 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
730 | } | |
731 | ||
f0868d1e SR |
732 | /** |
733 | * ftrace_find_event - find a registered event | |
734 | * @type: the type of event to look for | |
735 | * | |
736 | * Returns an event of type @type otherwise NULL | |
4f535968 | 737 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
738 | */ |
739 | struct trace_event *ftrace_find_event(int type) | |
740 | { | |
741 | struct trace_event *event; | |
742 | struct hlist_node *n; | |
743 | unsigned key; | |
744 | ||
745 | key = type & (EVENT_HASHSIZE - 1); | |
746 | ||
4f535968 | 747 | hlist_for_each_entry(event, n, &event_hash[key], node) { |
f0868d1e SR |
748 | if (event->type == type) |
749 | return event; | |
750 | } | |
751 | ||
752 | return NULL; | |
753 | } | |
754 | ||
060fa5c8 SR |
755 | static LIST_HEAD(ftrace_event_list); |
756 | ||
757 | static int trace_search_list(struct list_head **list) | |
758 | { | |
759 | struct trace_event *e; | |
760 | int last = __TRACE_LAST_TYPE; | |
761 | ||
762 | if (list_empty(&ftrace_event_list)) { | |
763 | *list = &ftrace_event_list; | |
764 | return last + 1; | |
765 | } | |
766 | ||
767 | /* | |
768 | * We used up all possible max events, | |
769 | * lets see if somebody freed one. | |
770 | */ | |
771 | list_for_each_entry(e, &ftrace_event_list, list) { | |
772 | if (e->type != last + 1) | |
773 | break; | |
774 | last++; | |
775 | } | |
776 | ||
777 | /* Did we used up all 65 thousand events??? */ | |
778 | if ((last + 1) > FTRACE_MAX_EVENT) | |
779 | return 0; | |
780 | ||
781 | *list = &e->list; | |
782 | return last + 1; | |
783 | } | |
784 | ||
4f535968 LJ |
785 | void trace_event_read_lock(void) |
786 | { | |
787 | down_read(&trace_event_mutex); | |
788 | } | |
789 | ||
790 | void trace_event_read_unlock(void) | |
791 | { | |
792 | up_read(&trace_event_mutex); | |
793 | } | |
794 | ||
f0868d1e SR |
795 | /** |
796 | * register_ftrace_event - register output for an event type | |
797 | * @event: the event type to register | |
798 | * | |
799 | * Event types are stored in a hash and this hash is used to | |
800 | * find a way to print an event. If the @event->type is set | |
801 | * then it will use that type, otherwise it will assign a | |
802 | * type to use. | |
803 | * | |
804 | * If you assign your own type, please make sure it is added | |
805 | * to the trace_type enum in trace.h, to avoid collisions | |
806 | * with the dynamic types. | |
807 | * | |
808 | * Returns the event type number or zero on error. | |
809 | */ | |
810 | int register_ftrace_event(struct trace_event *event) | |
811 | { | |
812 | unsigned key; | |
813 | int ret = 0; | |
814 | ||
4f535968 | 815 | down_write(&trace_event_mutex); |
f0868d1e | 816 | |
060fa5c8 | 817 | if (WARN_ON(!event)) |
28bea271 | 818 | goto out; |
28bea271 | 819 | |
a9a57763 SR |
820 | if (WARN_ON(!event->funcs)) |
821 | goto out; | |
822 | ||
060fa5c8 SR |
823 | INIT_LIST_HEAD(&event->list); |
824 | ||
825 | if (!event->type) { | |
48dd0fed | 826 | struct list_head *list = NULL; |
060fa5c8 SR |
827 | |
828 | if (next_event_type > FTRACE_MAX_EVENT) { | |
829 | ||
830 | event->type = trace_search_list(&list); | |
831 | if (!event->type) | |
832 | goto out; | |
833 | ||
834 | } else { | |
835 | ||
836 | event->type = next_event_type++; | |
837 | list = &ftrace_event_list; | |
838 | } | |
839 | ||
840 | if (WARN_ON(ftrace_find_event(event->type))) | |
841 | goto out; | |
842 | ||
843 | list_add_tail(&event->list, list); | |
844 | ||
845 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
846 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
847 | WARN_ON(1); | |
f0868d1e | 848 | goto out; |
060fa5c8 SR |
849 | } else { |
850 | /* Is this event already used */ | |
851 | if (ftrace_find_event(event->type)) | |
852 | goto out; | |
853 | } | |
f0868d1e | 854 | |
a9a57763 SR |
855 | if (event->funcs->trace == NULL) |
856 | event->funcs->trace = trace_nop_print; | |
857 | if (event->funcs->raw == NULL) | |
858 | event->funcs->raw = trace_nop_print; | |
859 | if (event->funcs->hex == NULL) | |
860 | event->funcs->hex = trace_nop_print; | |
861 | if (event->funcs->binary == NULL) | |
862 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 863 | |
f0868d1e SR |
864 | key = event->type & (EVENT_HASHSIZE - 1); |
865 | ||
4f535968 | 866 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
867 | |
868 | ret = event->type; | |
869 | out: | |
4f535968 | 870 | up_write(&trace_event_mutex); |
f0868d1e SR |
871 | |
872 | return ret; | |
873 | } | |
17c873ec | 874 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 875 | |
110bf2b7 SR |
876 | /* |
877 | * Used by module code with the trace_event_mutex held for write. | |
878 | */ | |
879 | int __unregister_ftrace_event(struct trace_event *event) | |
880 | { | |
881 | hlist_del(&event->node); | |
882 | list_del(&event->list); | |
883 | return 0; | |
884 | } | |
885 | ||
f0868d1e SR |
886 | /** |
887 | * unregister_ftrace_event - remove a no longer used event | |
888 | * @event: the event to remove | |
889 | */ | |
890 | int unregister_ftrace_event(struct trace_event *event) | |
891 | { | |
4f535968 | 892 | down_write(&trace_event_mutex); |
110bf2b7 | 893 | __unregister_ftrace_event(event); |
4f535968 | 894 | up_write(&trace_event_mutex); |
f0868d1e SR |
895 | |
896 | return 0; | |
897 | } | |
17c873ec | 898 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
899 | |
900 | /* | |
901 | * Standard events | |
902 | */ | |
903 | ||
a9a57763 SR |
904 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
905 | struct trace_event *event) | |
f633cef0 | 906 | { |
ee5e51f5 JO |
907 | if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type)) |
908 | return TRACE_TYPE_PARTIAL_LINE; | |
909 | ||
d9793bd8 | 910 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
911 | } |
912 | ||
913 | /* TRACE_FN */ | |
a9a57763 SR |
914 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
915 | struct trace_event *event) | |
f633cef0 SR |
916 | { |
917 | struct ftrace_entry *field; | |
2c9b238e | 918 | struct trace_seq *s = &iter->seq; |
f633cef0 | 919 | |
2c9b238e | 920 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
921 | |
922 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
923 | goto partial; | |
924 | ||
925 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
926 | if (!trace_seq_printf(s, " <-")) | |
927 | goto partial; | |
928 | if (!seq_print_ip_sym(s, | |
929 | field->parent_ip, | |
930 | flags)) | |
931 | goto partial; | |
932 | } | |
933 | if (!trace_seq_printf(s, "\n")) | |
934 | goto partial; | |
935 | ||
d9793bd8 | 936 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
937 | |
938 | partial: | |
939 | return TRACE_TYPE_PARTIAL_LINE; | |
940 | } | |
941 | ||
a9a57763 SR |
942 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
943 | struct trace_event *event) | |
f633cef0 SR |
944 | { |
945 | struct ftrace_entry *field; | |
946 | ||
2c9b238e | 947 | trace_assign_type(field, iter->ent); |
f633cef0 | 948 | |
2c9b238e | 949 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
950 | field->ip, |
951 | field->parent_ip)) | |
f633cef0 SR |
952 | return TRACE_TYPE_PARTIAL_LINE; |
953 | ||
d9793bd8 | 954 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
955 | } |
956 | ||
a9a57763 SR |
957 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
958 | struct trace_event *event) | |
f633cef0 SR |
959 | { |
960 | struct ftrace_entry *field; | |
2c9b238e | 961 | struct trace_seq *s = &iter->seq; |
f633cef0 | 962 | |
2c9b238e | 963 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
964 | |
965 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
966 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
967 | ||
d9793bd8 | 968 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
969 | } |
970 | ||
a9a57763 SR |
971 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
972 | struct trace_event *event) | |
f633cef0 SR |
973 | { |
974 | struct ftrace_entry *field; | |
2c9b238e | 975 | struct trace_seq *s = &iter->seq; |
f633cef0 | 976 | |
2c9b238e | 977 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
978 | |
979 | SEQ_PUT_FIELD_RET(s, field->ip); | |
980 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
981 | ||
d9793bd8 | 982 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
983 | } |
984 | ||
a9a57763 | 985 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 986 | .trace = trace_fn_trace, |
f633cef0 SR |
987 | .raw = trace_fn_raw, |
988 | .hex = trace_fn_hex, | |
989 | .binary = trace_fn_bin, | |
990 | }; | |
991 | ||
a9a57763 SR |
992 | static struct trace_event trace_fn_event = { |
993 | .type = TRACE_FN, | |
994 | .funcs = &trace_fn_funcs, | |
995 | }; | |
996 | ||
f633cef0 | 997 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
998 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
999 | char *delim) | |
f633cef0 SR |
1000 | { |
1001 | struct ctx_switch_entry *field; | |
4ca53085 | 1002 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
1003 | int S, T; |
1004 | ||
4ca53085 | 1005 | |
2c9b238e | 1006 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1007 | |
1008 | T = task_state_char(field->next_state); | |
1009 | S = task_state_char(field->prev_state); | |
4ca53085 | 1010 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
1011 | if (!trace_seq_printf(&iter->seq, |
1012 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
1013 | field->prev_pid, |
1014 | field->prev_prio, | |
1015 | S, delim, | |
1016 | field->next_cpu, | |
1017 | field->next_pid, | |
1018 | field->next_prio, | |
1019 | T, comm)) | |
f633cef0 SR |
1020 | return TRACE_TYPE_PARTIAL_LINE; |
1021 | ||
d9793bd8 | 1022 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1023 | } |
1024 | ||
a9a57763 SR |
1025 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
1026 | struct trace_event *event) | |
f633cef0 | 1027 | { |
2c9b238e | 1028 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
1029 | } |
1030 | ||
ae7462b4 | 1031 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 1032 | int flags, struct trace_event *event) |
f633cef0 | 1033 | { |
2c9b238e | 1034 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
1035 | } |
1036 | ||
2c9b238e | 1037 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
1038 | { |
1039 | struct ctx_switch_entry *field; | |
1040 | int T; | |
1041 | ||
2c9b238e | 1042 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1043 | |
1044 | if (!S) | |
b0f56f1a | 1045 | S = task_state_char(field->prev_state); |
f633cef0 | 1046 | T = task_state_char(field->next_state); |
2c9b238e | 1047 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
1048 | field->prev_pid, |
1049 | field->prev_prio, | |
1050 | S, | |
1051 | field->next_cpu, | |
1052 | field->next_pid, | |
1053 | field->next_prio, | |
1054 | T)) | |
f633cef0 SR |
1055 | return TRACE_TYPE_PARTIAL_LINE; |
1056 | ||
d9793bd8 | 1057 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1058 | } |
1059 | ||
a9a57763 SR |
1060 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
1061 | struct trace_event *event) | |
f633cef0 | 1062 | { |
2c9b238e | 1063 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
1064 | } |
1065 | ||
a9a57763 SR |
1066 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
1067 | struct trace_event *event) | |
f633cef0 | 1068 | { |
2c9b238e | 1069 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
1070 | } |
1071 | ||
1072 | ||
2c9b238e | 1073 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
1074 | { |
1075 | struct ctx_switch_entry *field; | |
2c9b238e | 1076 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1077 | int T; |
1078 | ||
2c9b238e | 1079 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1080 | |
1081 | if (!S) | |
b0f56f1a | 1082 | S = task_state_char(field->prev_state); |
f633cef0 SR |
1083 | T = task_state_char(field->next_state); |
1084 | ||
1085 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
1086 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
1087 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
1088 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
1089 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
1090 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
1091 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
1092 | ||
d9793bd8 | 1093 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1094 | } |
1095 | ||
a9a57763 SR |
1096 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1097 | struct trace_event *event) | |
f633cef0 | 1098 | { |
2c9b238e | 1099 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1100 | } |
1101 | ||
a9a57763 SR |
1102 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1103 | struct trace_event *event) | |
f633cef0 | 1104 | { |
2c9b238e | 1105 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1106 | } |
1107 | ||
ae7462b4 | 1108 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1109 | int flags, struct trace_event *event) |
f633cef0 SR |
1110 | { |
1111 | struct ctx_switch_entry *field; | |
2c9b238e | 1112 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1113 | |
2c9b238e | 1114 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1115 | |
1116 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
1117 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
1118 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
1119 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
1120 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
1121 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
1122 | ||
d9793bd8 | 1123 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1124 | } |
1125 | ||
a9a57763 | 1126 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1127 | .trace = trace_ctx_print, |
f633cef0 SR |
1128 | .raw = trace_ctx_raw, |
1129 | .hex = trace_ctx_hex, | |
1130 | .binary = trace_ctxwake_bin, | |
1131 | }; | |
1132 | ||
a9a57763 SR |
1133 | static struct trace_event trace_ctx_event = { |
1134 | .type = TRACE_CTX, | |
1135 | .funcs = &trace_ctx_funcs, | |
1136 | }; | |
1137 | ||
1138 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1139 | .trace = trace_wake_print, |
f633cef0 SR |
1140 | .raw = trace_wake_raw, |
1141 | .hex = trace_wake_hex, | |
1142 | .binary = trace_ctxwake_bin, | |
1143 | }; | |
1144 | ||
a9a57763 SR |
1145 | static struct trace_event trace_wake_event = { |
1146 | .type = TRACE_WAKE, | |
1147 | .funcs = &trace_wake_funcs, | |
1148 | }; | |
1149 | ||
f633cef0 SR |
1150 | /* TRACE_STACK */ |
1151 | ||
ae7462b4 | 1152 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1153 | int flags, struct trace_event *event) |
f633cef0 SR |
1154 | { |
1155 | struct stack_entry *field; | |
2c9b238e | 1156 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1157 | unsigned long *p; |
1158 | unsigned long *end; | |
f633cef0 | 1159 | |
2c9b238e | 1160 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1161 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1162 | |
563af16c | 1163 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1164 | goto partial; |
4a9bd3f1 SR |
1165 | |
1166 | for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { | |
f11b3f4e | 1167 | if (!trace_seq_puts(s, " => ")) |
1168 | goto partial; | |
f633cef0 | 1169 | |
4a9bd3f1 | 1170 | if (!seq_print_ip_sym(s, *p, flags)) |
f11b3f4e | 1171 | goto partial; |
6c1a99af | 1172 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
1173 | goto partial; |
1174 | } | |
1175 | ||
d9793bd8 | 1176 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1177 | |
1178 | partial: | |
1179 | return TRACE_TYPE_PARTIAL_LINE; | |
1180 | } | |
1181 | ||
a9a57763 | 1182 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1183 | .trace = trace_stack_print, |
f633cef0 SR |
1184 | }; |
1185 | ||
a9a57763 SR |
1186 | static struct trace_event trace_stack_event = { |
1187 | .type = TRACE_STACK, | |
1188 | .funcs = &trace_stack_funcs, | |
1189 | }; | |
1190 | ||
f633cef0 | 1191 | /* TRACE_USER_STACK */ |
ae7462b4 | 1192 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1193 | int flags, struct trace_event *event) |
f633cef0 SR |
1194 | { |
1195 | struct userstack_entry *field; | |
2c9b238e | 1196 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1197 | |
2c9b238e | 1198 | trace_assign_type(field, iter->ent); |
f633cef0 | 1199 | |
563af16c | 1200 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1201 | goto partial; |
1202 | ||
048dc50c | 1203 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1204 | goto partial; |
1205 | ||
d9793bd8 | 1206 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1207 | |
1208 | partial: | |
1209 | return TRACE_TYPE_PARTIAL_LINE; | |
1210 | } | |
1211 | ||
a9a57763 | 1212 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1213 | .trace = trace_user_stack_print, |
f633cef0 SR |
1214 | }; |
1215 | ||
a9a57763 SR |
1216 | static struct trace_event trace_user_stack_event = { |
1217 | .type = TRACE_USER_STACK, | |
1218 | .funcs = &trace_user_stack_funcs, | |
1219 | }; | |
1220 | ||
48ead020 | 1221 | /* TRACE_BPRINT */ |
1427cdf0 | 1222 | static enum print_line_t |
a9a57763 SR |
1223 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1224 | struct trace_event *event) | |
1427cdf0 LJ |
1225 | { |
1226 | struct trace_entry *entry = iter->ent; | |
1227 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1228 | struct bprint_entry *field; |
1427cdf0 LJ |
1229 | |
1230 | trace_assign_type(field, entry); | |
1231 | ||
1232 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1233 | goto partial; | |
1234 | ||
1235 | if (!trace_seq_puts(s, ": ")) | |
1236 | goto partial; | |
1237 | ||
1238 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1239 | goto partial; | |
1240 | ||
1241 | return TRACE_TYPE_HANDLED; | |
1242 | ||
1243 | partial: | |
1244 | return TRACE_TYPE_PARTIAL_LINE; | |
1245 | } | |
1246 | ||
769b0441 | 1247 | |
48ead020 | 1248 | static enum print_line_t |
a9a57763 SR |
1249 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1250 | struct trace_event *event) | |
1427cdf0 | 1251 | { |
48ead020 | 1252 | struct bprint_entry *field; |
1427cdf0 | 1253 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1254 | |
769b0441 | 1255 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1256 | |
1257 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1258 | goto partial; | |
1259 | ||
1260 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1261 | goto partial; | |
1262 | ||
1263 | return TRACE_TYPE_HANDLED; | |
1264 | ||
1265 | partial: | |
1266 | return TRACE_TYPE_PARTIAL_LINE; | |
1267 | } | |
1268 | ||
a9a57763 SR |
1269 | static struct trace_event_functions trace_bprint_funcs = { |
1270 | .trace = trace_bprint_print, | |
1271 | .raw = trace_bprint_raw, | |
1272 | }; | |
769b0441 | 1273 | |
48ead020 FW |
1274 | static struct trace_event trace_bprint_event = { |
1275 | .type = TRACE_BPRINT, | |
a9a57763 | 1276 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1277 | }; |
1278 | ||
1279 | /* TRACE_PRINT */ | |
1280 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1281 | int flags, struct trace_event *event) |
48ead020 FW |
1282 | { |
1283 | struct print_entry *field; | |
1284 | struct trace_seq *s = &iter->seq; | |
1285 | ||
1286 | trace_assign_type(field, iter->ent); | |
1287 | ||
1288 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1289 | goto partial; | |
1290 | ||
1291 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1292 | goto partial; | |
1293 | ||
1294 | return TRACE_TYPE_HANDLED; | |
1295 | ||
1296 | partial: | |
1297 | return TRACE_TYPE_PARTIAL_LINE; | |
1298 | } | |
1299 | ||
a9a57763 SR |
1300 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1301 | struct trace_event *event) | |
48ead020 FW |
1302 | { |
1303 | struct print_entry *field; | |
1304 | ||
1305 | trace_assign_type(field, iter->ent); | |
1306 | ||
1307 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1308 | goto partial; | |
1309 | ||
1310 | return TRACE_TYPE_HANDLED; | |
1311 | ||
1312 | partial: | |
1313 | return TRACE_TYPE_PARTIAL_LINE; | |
1314 | } | |
1315 | ||
a9a57763 | 1316 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1317 | .trace = trace_print_print, |
1318 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1319 | }; |
1320 | ||
a9a57763 SR |
1321 | static struct trace_event trace_print_event = { |
1322 | .type = TRACE_PRINT, | |
1323 | .funcs = &trace_print_funcs, | |
1324 | }; | |
1325 | ||
48ead020 | 1326 | |
f633cef0 SR |
1327 | static struct trace_event *events[] __initdata = { |
1328 | &trace_fn_event, | |
1329 | &trace_ctx_event, | |
1330 | &trace_wake_event, | |
f633cef0 SR |
1331 | &trace_stack_event, |
1332 | &trace_user_stack_event, | |
48ead020 | 1333 | &trace_bprint_event, |
f633cef0 SR |
1334 | &trace_print_event, |
1335 | NULL | |
1336 | }; | |
1337 | ||
1338 | __init static int init_events(void) | |
1339 | { | |
1340 | struct trace_event *event; | |
1341 | int i, ret; | |
1342 | ||
1343 | for (i = 0; events[i]; i++) { | |
1344 | event = events[i]; | |
1345 | ||
1346 | ret = register_ftrace_event(event); | |
1347 | if (!ret) { | |
1348 | printk(KERN_WARNING "event %d failed to register\n", | |
1349 | event->type); | |
1350 | WARN_ON_ONCE(1); | |
1351 | } | |
1352 | } | |
1353 | ||
1354 | return 0; | |
1355 | } | |
7374e827 | 1356 | early_initcall(init_events); |