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 | ||
52f6ad6d | 17 | DECLARE_RWSEM(trace_event_sem); |
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 | ||
09ae7234 SRRH |
40 | enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter) |
41 | { | |
42 | struct trace_seq *s = &iter->seq; | |
43 | struct trace_entry *entry = iter->ent; | |
44 | struct bputs_entry *field; | |
45 | int ret; | |
46 | ||
47 | trace_assign_type(field, entry); | |
48 | ||
49 | ret = trace_seq_puts(s, field->str); | |
50 | if (!ret) | |
51 | return TRACE_TYPE_PARTIAL_LINE; | |
52 | ||
53 | return TRACE_TYPE_HANDLED; | |
54 | } | |
55 | ||
5ef841f6 SR |
56 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
57 | { | |
58 | struct trace_seq *s = &iter->seq; | |
59 | struct trace_entry *entry = iter->ent; | |
60 | struct bprint_entry *field; | |
61 | int ret; | |
62 | ||
63 | trace_assign_type(field, entry); | |
64 | ||
65 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
66 | if (!ret) | |
67 | return TRACE_TYPE_PARTIAL_LINE; | |
68 | ||
69 | return TRACE_TYPE_HANDLED; | |
70 | } | |
71 | ||
72 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
73 | { | |
74 | struct trace_seq *s = &iter->seq; | |
75 | struct trace_entry *entry = iter->ent; | |
76 | struct print_entry *field; | |
77 | int ret; | |
78 | ||
79 | trace_assign_type(field, entry); | |
80 | ||
146c3442 | 81 | ret = trace_seq_puts(s, field->buf); |
5ef841f6 SR |
82 | if (!ret) |
83 | return TRACE_TYPE_PARTIAL_LINE; | |
84 | ||
85 | return TRACE_TYPE_HANDLED; | |
86 | } | |
87 | ||
f0868d1e SR |
88 | /** |
89 | * trace_seq_printf - sequence printing of trace information | |
90 | * @s: trace sequence descriptor | |
91 | * @fmt: printf format string | |
92 | * | |
3e69533b JO |
93 | * It returns 0 if the trace oversizes the buffer's free |
94 | * space, 1 otherwise. | |
95 | * | |
f0868d1e SR |
96 | * The tracer may use either sequence operations or its own |
97 | * copy to user routines. To simplify formating of a trace | |
98 | * trace_seq_printf is used to store strings into a special | |
99 | * buffer (@s). Then the output may be either used by | |
100 | * the sequencer or pulled into another buffer. | |
101 | */ | |
102 | int | |
103 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
104 | { | |
105 | int len = (PAGE_SIZE - 1) - s->len; | |
106 | va_list ap; | |
107 | int ret; | |
108 | ||
d184b31c | 109 | if (s->full || !len) |
f0868d1e SR |
110 | return 0; |
111 | ||
112 | va_start(ap, fmt); | |
113 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
114 | va_end(ap); | |
115 | ||
116 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
117 | if (ret >= len) { |
118 | s->full = 1; | |
f0868d1e | 119 | return 0; |
d184b31c | 120 | } |
f0868d1e SR |
121 | |
122 | s->len += ret; | |
123 | ||
3e69533b | 124 | return 1; |
f0868d1e | 125 | } |
17c873ec | 126 | EXPORT_SYMBOL_GPL(trace_seq_printf); |
f0868d1e | 127 | |
4449bf92 SRRH |
128 | /** |
129 | * trace_seq_bitmask - put a list of longs as a bitmask print output | |
130 | * @s: trace sequence descriptor | |
131 | * @maskp: points to an array of unsigned longs that represent a bitmask | |
132 | * @nmaskbits: The number of bits that are valid in @maskp | |
133 | * | |
134 | * It returns 0 if the trace oversizes the buffer's free | |
135 | * space, 1 otherwise. | |
136 | * | |
137 | * Writes a ASCII representation of a bitmask string into @s. | |
138 | */ | |
139 | int | |
140 | trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, | |
141 | int nmaskbits) | |
142 | { | |
143 | int len = (PAGE_SIZE - 1) - s->len; | |
144 | int ret; | |
145 | ||
146 | if (s->full || !len) | |
147 | return 0; | |
148 | ||
149 | ret = bitmap_scnprintf(s->buffer, len, maskp, nmaskbits); | |
150 | s->len += ret; | |
151 | ||
152 | return 1; | |
153 | } | |
154 | EXPORT_SYMBOL_GPL(trace_seq_bitmask); | |
155 | ||
725c624a SR |
156 | /** |
157 | * trace_seq_vprintf - sequence printing of trace information | |
158 | * @s: trace sequence descriptor | |
159 | * @fmt: printf format string | |
160 | * | |
161 | * The tracer may use either sequence operations or its own | |
162 | * copy to user routines. To simplify formating of a trace | |
163 | * trace_seq_printf is used to store strings into a special | |
164 | * buffer (@s). Then the output may be either used by | |
165 | * the sequencer or pulled into another buffer. | |
166 | */ | |
167 | int | |
168 | trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) | |
169 | { | |
170 | int len = (PAGE_SIZE - 1) - s->len; | |
171 | int ret; | |
172 | ||
d184b31c | 173 | if (s->full || !len) |
725c624a SR |
174 | return 0; |
175 | ||
176 | ret = vsnprintf(s->buffer + s->len, len, fmt, args); | |
177 | ||
178 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
179 | if (ret >= len) { |
180 | s->full = 1; | |
725c624a | 181 | return 0; |
d184b31c | 182 | } |
725c624a SR |
183 | |
184 | s->len += ret; | |
185 | ||
186 | return len; | |
187 | } | |
188 | EXPORT_SYMBOL_GPL(trace_seq_vprintf); | |
189 | ||
769b0441 | 190 | int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
1427cdf0 LJ |
191 | { |
192 | int len = (PAGE_SIZE - 1) - s->len; | |
193 | int ret; | |
194 | ||
d184b31c | 195 | if (s->full || !len) |
1427cdf0 LJ |
196 | return 0; |
197 | ||
198 | ret = bstr_printf(s->buffer + s->len, len, fmt, binary); | |
199 | ||
200 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
201 | if (ret >= len) { |
202 | s->full = 1; | |
1427cdf0 | 203 | return 0; |
d184b31c | 204 | } |
1427cdf0 LJ |
205 | |
206 | s->len += ret; | |
207 | ||
208 | return len; | |
209 | } | |
210 | ||
f0868d1e SR |
211 | /** |
212 | * trace_seq_puts - trace sequence printing of simple string | |
213 | * @s: trace sequence descriptor | |
214 | * @str: simple string to record | |
215 | * | |
216 | * The tracer may use either the sequence operations or its own | |
217 | * copy to user routines. This function records a simple string | |
218 | * into a special buffer (@s) for later retrieval by a sequencer | |
219 | * or other mechanism. | |
220 | */ | |
221 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
222 | { | |
223 | int len = strlen(str); | |
224 | ||
d184b31c | 225 | if (s->full) |
f0868d1e SR |
226 | return 0; |
227 | ||
d184b31c JB |
228 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
229 | s->full = 1; | |
230 | return 0; | |
231 | } | |
232 | ||
f0868d1e SR |
233 | memcpy(s->buffer + s->len, str, len); |
234 | s->len += len; | |
235 | ||
236 | return len; | |
237 | } | |
238 | ||
239 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
240 | { | |
d184b31c | 241 | if (s->full) |
f0868d1e SR |
242 | return 0; |
243 | ||
d184b31c JB |
244 | if (s->len >= (PAGE_SIZE - 1)) { |
245 | s->full = 1; | |
246 | return 0; | |
247 | } | |
248 | ||
f0868d1e SR |
249 | s->buffer[s->len++] = c; |
250 | ||
251 | return 1; | |
252 | } | |
bf816235 | 253 | EXPORT_SYMBOL(trace_seq_putc); |
f0868d1e | 254 | |
b14b70a6 | 255 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e | 256 | { |
d184b31c | 257 | if (s->full) |
f0868d1e SR |
258 | return 0; |
259 | ||
d184b31c JB |
260 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
261 | s->full = 1; | |
262 | return 0; | |
263 | } | |
264 | ||
f0868d1e SR |
265 | memcpy(s->buffer + s->len, mem, len); |
266 | s->len += len; | |
267 | ||
268 | return len; | |
269 | } | |
270 | ||
b14b70a6 | 271 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
272 | { |
273 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 274 | const unsigned char *data = mem; |
f0868d1e SR |
275 | int i, j; |
276 | ||
d184b31c JB |
277 | if (s->full) |
278 | return 0; | |
279 | ||
f0868d1e SR |
280 | #ifdef __BIG_ENDIAN |
281 | for (i = 0, j = 0; i < len; i++) { | |
282 | #else | |
283 | for (i = len-1, j = 0; i >= 0; i--) { | |
284 | #endif | |
285 | hex[j++] = hex_asc_hi(data[i]); | |
286 | hex[j++] = hex_asc_lo(data[i]); | |
287 | } | |
288 | hex[j++] = ' '; | |
289 | ||
290 | return trace_seq_putmem(s, hex, j); | |
291 | } | |
292 | ||
bdd6df6a EGM |
293 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
294 | { | |
295 | void *ret; | |
296 | ||
d184b31c | 297 | if (s->full) |
668eb65f | 298 | return NULL; |
d184b31c JB |
299 | |
300 | if (len > ((PAGE_SIZE - 1) - s->len)) { | |
301 | s->full = 1; | |
bdd6df6a | 302 | return NULL; |
d184b31c | 303 | } |
bdd6df6a EGM |
304 | |
305 | ret = s->buffer + s->len; | |
306 | s->len += len; | |
307 | ||
308 | return ret; | |
309 | } | |
310 | ||
38eff289 | 311 | int trace_seq_path(struct trace_seq *s, const struct path *path) |
f0868d1e SR |
312 | { |
313 | unsigned char *p; | |
314 | ||
d184b31c | 315 | if (s->full) |
f0868d1e | 316 | return 0; |
d184b31c JB |
317 | |
318 | if (s->len >= (PAGE_SIZE - 1)) { | |
319 | s->full = 1; | |
320 | return 0; | |
321 | } | |
322 | ||
f0868d1e SR |
323 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); |
324 | if (!IS_ERR(p)) { | |
325 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
326 | if (p) { | |
327 | s->len = p - s->buffer; | |
328 | return 1; | |
329 | } | |
330 | } else { | |
331 | s->buffer[s->len++] = '?'; | |
332 | return 1; | |
333 | } | |
334 | ||
d184b31c | 335 | s->full = 1; |
f0868d1e SR |
336 | return 0; |
337 | } | |
338 | ||
be74b73a SR |
339 | const char * |
340 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
341 | unsigned long flags, | |
342 | const struct trace_print_flags *flag_array) | |
343 | { | |
344 | unsigned long mask; | |
345 | const char *str; | |
56d8bd3f | 346 | const char *ret = p->buffer + p->len; |
e404b321 | 347 | int i, first = 1; |
be74b73a | 348 | |
be74b73a SR |
349 | for (i = 0; flag_array[i].name && flags; i++) { |
350 | ||
351 | mask = flag_array[i].mask; | |
352 | if ((flags & mask) != mask) | |
353 | continue; | |
354 | ||
355 | str = flag_array[i].name; | |
356 | flags &= ~mask; | |
e404b321 | 357 | if (!first && delim) |
be74b73a | 358 | trace_seq_puts(p, delim); |
e404b321 AV |
359 | else |
360 | first = 0; | |
be74b73a SR |
361 | trace_seq_puts(p, str); |
362 | } | |
363 | ||
364 | /* check for left over flags */ | |
365 | if (flags) { | |
5b349261 | 366 | if (!first && delim) |
be74b73a SR |
367 | trace_seq_puts(p, delim); |
368 | trace_seq_printf(p, "0x%lx", flags); | |
369 | } | |
370 | ||
371 | trace_seq_putc(p, 0); | |
372 | ||
56d8bd3f | 373 | return ret; |
be74b73a | 374 | } |
ec081ddc | 375 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 376 | |
0f4fc29d SR |
377 | const char * |
378 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
379 | const struct trace_print_flags *symbol_array) | |
380 | { | |
381 | int i; | |
56d8bd3f | 382 | const char *ret = p->buffer + p->len; |
0f4fc29d SR |
383 | |
384 | for (i = 0; symbol_array[i].name; i++) { | |
385 | ||
386 | if (val != symbol_array[i].mask) | |
387 | continue; | |
388 | ||
389 | trace_seq_puts(p, symbol_array[i].name); | |
390 | break; | |
391 | } | |
392 | ||
5b349261 | 393 | if (ret == (const char *)(p->buffer + p->len)) |
0f4fc29d SR |
394 | trace_seq_printf(p, "0x%lx", val); |
395 | ||
396 | trace_seq_putc(p, 0); | |
397 | ||
56d8bd3f | 398 | return ret; |
0f4fc29d | 399 | } |
ec081ddc | 400 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 401 | |
2fc1b6f0 | 402 | #if BITS_PER_LONG == 32 |
403 | const char * | |
404 | ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, | |
405 | const struct trace_print_flags_u64 *symbol_array) | |
406 | { | |
407 | int i; | |
408 | const char *ret = p->buffer + p->len; | |
409 | ||
410 | for (i = 0; symbol_array[i].name; i++) { | |
411 | ||
412 | if (val != symbol_array[i].mask) | |
413 | continue; | |
414 | ||
415 | trace_seq_puts(p, symbol_array[i].name); | |
416 | break; | |
417 | } | |
418 | ||
5b349261 | 419 | if (ret == (const char *)(p->buffer + p->len)) |
2fc1b6f0 | 420 | trace_seq_printf(p, "0x%llx", val); |
421 | ||
422 | trace_seq_putc(p, 0); | |
423 | ||
424 | return ret; | |
425 | } | |
426 | EXPORT_SYMBOL(ftrace_print_symbols_seq_u64); | |
427 | #endif | |
428 | ||
4449bf92 SRRH |
429 | const char * |
430 | ftrace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, | |
431 | unsigned int bitmask_size) | |
432 | { | |
433 | const char *ret = p->buffer + p->len; | |
434 | ||
435 | trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8); | |
436 | trace_seq_putc(p, 0); | |
437 | ||
438 | return ret; | |
439 | } | |
440 | EXPORT_SYMBOL_GPL(ftrace_print_bitmask_seq); | |
441 | ||
5a2e3995 KT |
442 | const char * |
443 | ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) | |
444 | { | |
445 | int i; | |
446 | const char *ret = p->buffer + p->len; | |
447 | ||
448 | for (i = 0; i < buf_len; i++) | |
449 | trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]); | |
450 | ||
451 | trace_seq_putc(p, 0); | |
452 | ||
453 | return ret; | |
454 | } | |
455 | EXPORT_SYMBOL(ftrace_print_hex_seq); | |
456 | ||
f71130de LZ |
457 | int ftrace_raw_output_prep(struct trace_iterator *iter, |
458 | struct trace_event *trace_event) | |
459 | { | |
460 | struct ftrace_event_call *event; | |
461 | struct trace_seq *s = &iter->seq; | |
462 | struct trace_seq *p = &iter->tmp_seq; | |
463 | struct trace_entry *entry; | |
464 | int ret; | |
465 | ||
466 | event = container_of(trace_event, struct ftrace_event_call, event); | |
467 | entry = iter->ent; | |
468 | ||
469 | if (entry->type != event->event.type) { | |
470 | WARN_ON_ONCE(1); | |
471 | return TRACE_TYPE_UNHANDLED; | |
472 | } | |
473 | ||
474 | trace_seq_init(p); | |
de7b2973 | 475 | ret = trace_seq_printf(s, "%s: ", ftrace_event_name(event)); |
f71130de LZ |
476 | if (!ret) |
477 | return TRACE_TYPE_PARTIAL_LINE; | |
478 | ||
479 | return 0; | |
480 | } | |
481 | EXPORT_SYMBOL(ftrace_raw_output_prep); | |
482 | ||
1d6bae96 SR |
483 | static int ftrace_output_raw(struct trace_iterator *iter, char *name, |
484 | char *fmt, va_list ap) | |
485 | { | |
486 | struct trace_seq *s = &iter->seq; | |
487 | int ret; | |
488 | ||
489 | ret = trace_seq_printf(s, "%s: ", name); | |
490 | if (!ret) | |
491 | return TRACE_TYPE_PARTIAL_LINE; | |
492 | ||
493 | ret = trace_seq_vprintf(s, fmt, ap); | |
494 | ||
495 | if (!ret) | |
496 | return TRACE_TYPE_PARTIAL_LINE; | |
497 | ||
498 | return TRACE_TYPE_HANDLED; | |
499 | } | |
500 | ||
501 | int ftrace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...) | |
502 | { | |
503 | va_list ap; | |
504 | int ret; | |
505 | ||
506 | va_start(ap, fmt); | |
507 | ret = ftrace_output_raw(iter, name, fmt, ap); | |
508 | va_end(ap); | |
509 | ||
510 | return ret; | |
511 | } | |
512 | EXPORT_SYMBOL_GPL(ftrace_output_call); | |
513 | ||
f0868d1e SR |
514 | #ifdef CONFIG_KRETPROBES |
515 | static inline const char *kretprobed(const char *name) | |
516 | { | |
517 | static const char tramp_name[] = "kretprobe_trampoline"; | |
518 | int size = sizeof(tramp_name); | |
519 | ||
520 | if (strncmp(tramp_name, name, size) == 0) | |
521 | return "[unknown/kretprobe'd]"; | |
522 | return name; | |
523 | } | |
524 | #else | |
525 | static inline const char *kretprobed(const char *name) | |
526 | { | |
527 | return name; | |
528 | } | |
529 | #endif /* CONFIG_KRETPROBES */ | |
530 | ||
531 | static int | |
532 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
533 | { | |
534 | #ifdef CONFIG_KALLSYMS | |
535 | char str[KSYM_SYMBOL_LEN]; | |
536 | const char *name; | |
537 | ||
538 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
539 | ||
540 | name = kretprobed(str); | |
541 | ||
542 | return trace_seq_printf(s, fmt, name); | |
543 | #endif | |
544 | return 1; | |
545 | } | |
546 | ||
547 | static int | |
548 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
549 | unsigned long address) | |
550 | { | |
551 | #ifdef CONFIG_KALLSYMS | |
552 | char str[KSYM_SYMBOL_LEN]; | |
553 | const char *name; | |
554 | ||
555 | sprint_symbol(str, address); | |
556 | name = kretprobed(str); | |
557 | ||
558 | return trace_seq_printf(s, fmt, name); | |
559 | #endif | |
560 | return 1; | |
561 | } | |
562 | ||
563 | #ifndef CONFIG_64BIT | |
564 | # define IP_FMT "%08lx" | |
565 | #else | |
566 | # define IP_FMT "%016lx" | |
567 | #endif | |
568 | ||
569 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
570 | unsigned long ip, unsigned long sym_flags) | |
571 | { | |
572 | struct file *file = NULL; | |
573 | unsigned long vmstart = 0; | |
574 | int ret = 1; | |
575 | ||
d184b31c JB |
576 | if (s->full) |
577 | return 0; | |
578 | ||
f0868d1e SR |
579 | if (mm) { |
580 | const struct vm_area_struct *vma; | |
581 | ||
582 | down_read(&mm->mmap_sem); | |
583 | vma = find_vma(mm, ip); | |
584 | if (vma) { | |
585 | file = vma->vm_file; | |
586 | vmstart = vma->vm_start; | |
587 | } | |
588 | if (file) { | |
589 | ret = trace_seq_path(s, &file->f_path); | |
590 | if (ret) | |
591 | ret = trace_seq_printf(s, "[+0x%lx]", | |
592 | ip - vmstart); | |
593 | } | |
594 | up_read(&mm->mmap_sem); | |
595 | } | |
596 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
597 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
598 | return ret; | |
599 | } | |
600 | ||
601 | int | |
602 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
603 | unsigned long sym_flags) | |
604 | { | |
605 | struct mm_struct *mm = NULL; | |
606 | int ret = 1; | |
607 | unsigned int i; | |
608 | ||
609 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
610 | struct task_struct *task; | |
611 | /* | |
612 | * we do the lookup on the thread group leader, | |
613 | * since individual threads might have already quit! | |
614 | */ | |
615 | rcu_read_lock(); | |
48659d31 | 616 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
617 | if (task) |
618 | mm = get_task_mm(task); | |
619 | rcu_read_unlock(); | |
620 | } | |
621 | ||
622 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
623 | unsigned long ip = entry->caller[i]; | |
624 | ||
625 | if (ip == ULONG_MAX || !ret) | |
626 | break; | |
048dc50c | 627 | if (ret) |
628 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
629 | if (!ip) { |
630 | if (ret) | |
631 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 632 | if (ret) |
146c3442 | 633 | ret = trace_seq_putc(s, '\n'); |
f0868d1e SR |
634 | continue; |
635 | } | |
636 | if (!ret) | |
637 | break; | |
638 | if (ret) | |
639 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
146c3442 | 640 | ret = trace_seq_putc(s, '\n'); |
f0868d1e SR |
641 | } |
642 | ||
643 | if (mm) | |
644 | mmput(mm); | |
645 | return ret; | |
646 | } | |
647 | ||
648 | int | |
649 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
650 | { | |
651 | int ret; | |
652 | ||
653 | if (!ip) | |
146c3442 | 654 | return trace_seq_putc(s, '0'); |
f0868d1e SR |
655 | |
656 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
657 | ret = seq_print_sym_offset(s, "%s", ip); | |
658 | else | |
659 | ret = seq_print_sym_short(s, "%s", ip); | |
660 | ||
661 | if (!ret) | |
662 | return 0; | |
663 | ||
664 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
665 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
666 | return ret; | |
667 | } | |
668 | ||
f81c972d SR |
669 | /** |
670 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
671 | * @s: trace seq struct to write to | |
672 | * @entry: The trace entry field from the ring buffer | |
673 | * | |
674 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 675 | * count. |
f81c972d SR |
676 | */ |
677 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 678 | { |
10da37a6 DS |
679 | char hardsoft_irq; |
680 | char need_resched; | |
681 | char irqs_off; | |
682 | int hardirq; | |
683 | int softirq; | |
637e7e86 | 684 | int ret; |
c4a8e8be | 685 | |
c4a8e8be FW |
686 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
687 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 688 | |
10da37a6 DS |
689 | irqs_off = |
690 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
691 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
692 | '.'; | |
e5137b50 PZ |
693 | |
694 | switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | | |
695 | TRACE_FLAG_PREEMPT_RESCHED)) { | |
696 | case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: | |
697 | need_resched = 'N'; | |
698 | break; | |
699 | case TRACE_FLAG_NEED_RESCHED: | |
700 | need_resched = 'n'; | |
701 | break; | |
702 | case TRACE_FLAG_PREEMPT_RESCHED: | |
703 | need_resched = 'p'; | |
704 | break; | |
705 | default: | |
706 | need_resched = '.'; | |
707 | break; | |
708 | } | |
709 | ||
10da37a6 DS |
710 | hardsoft_irq = |
711 | (hardirq && softirq) ? 'H' : | |
712 | hardirq ? 'h' : | |
713 | softirq ? 's' : | |
714 | '.'; | |
715 | ||
f81c972d | 716 | if (!trace_seq_printf(s, "%c%c%c", |
10da37a6 | 717 | irqs_off, need_resched, hardsoft_irq)) |
d9793bd8 | 718 | return 0; |
c4a8e8be | 719 | |
829b876d SR |
720 | if (entry->preempt_count) |
721 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 722 | else |
829b876d SR |
723 | ret = trace_seq_putc(s, '.'); |
724 | ||
e6e1e259 | 725 | return ret; |
c4a8e8be FW |
726 | } |
727 | ||
f81c972d SR |
728 | static int |
729 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
730 | { | |
731 | char comm[TASK_COMM_LEN]; | |
732 | ||
733 | trace_find_cmdline(entry->pid, comm); | |
734 | ||
735 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
736 | comm, entry->pid, cpu)) | |
737 | return 0; | |
738 | ||
739 | return trace_print_lat_fmt(s, entry); | |
740 | } | |
741 | ||
8be0709f | 742 | static unsigned long preempt_mark_thresh_us = 100; |
c4a8e8be | 743 | |
d9793bd8 | 744 | static int |
8be0709f | 745 | lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
c4a8e8be | 746 | { |
8be0709f DS |
747 | unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE; |
748 | unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; | |
12883efb | 749 | unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start; |
8be0709f DS |
750 | unsigned long long rel_ts = next_ts - iter->ts; |
751 | struct trace_seq *s = &iter->seq; | |
752 | ||
753 | if (in_ns) { | |
754 | abs_ts = ns2usecs(abs_ts); | |
755 | rel_ts = ns2usecs(rel_ts); | |
756 | } | |
757 | ||
758 | if (verbose && in_ns) { | |
759 | unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); | |
760 | unsigned long abs_msec = (unsigned long)abs_ts; | |
761 | unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); | |
762 | unsigned long rel_msec = (unsigned long)rel_ts; | |
763 | ||
764 | return trace_seq_printf( | |
765 | s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", | |
766 | ns2usecs(iter->ts), | |
767 | abs_msec, abs_usec, | |
768 | rel_msec, rel_usec); | |
769 | } else if (verbose && !in_ns) { | |
770 | return trace_seq_printf( | |
771 | s, "[%016llx] %lld (+%lld): ", | |
772 | iter->ts, abs_ts, rel_ts); | |
773 | } else if (!verbose && in_ns) { | |
774 | return trace_seq_printf( | |
775 | s, " %4lldus%c: ", | |
776 | abs_ts, | |
777 | rel_ts > preempt_mark_thresh_us ? '!' : | |
778 | rel_ts > 1 ? '+' : ' '); | |
779 | } else { /* !verbose && !in_ns */ | |
780 | return trace_seq_printf(s, " %4lld: ", abs_ts); | |
781 | } | |
c4a8e8be FW |
782 | } |
783 | ||
784 | int trace_print_context(struct trace_iterator *iter) | |
785 | { | |
786 | struct trace_seq *s = &iter->seq; | |
787 | struct trace_entry *entry = iter->ent; | |
8be0709f DS |
788 | unsigned long long t; |
789 | unsigned long secs, usec_rem; | |
4ca53085 | 790 | char comm[TASK_COMM_LEN]; |
77271ce4 | 791 | int ret; |
4ca53085 SR |
792 | |
793 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 794 | |
77271ce4 SR |
795 | ret = trace_seq_printf(s, "%16s-%-5d [%03d] ", |
796 | comm, entry->pid, iter->cpu); | |
797 | if (!ret) | |
798 | return 0; | |
799 | ||
800 | if (trace_flags & TRACE_ITER_IRQ_INFO) { | |
801 | ret = trace_print_lat_fmt(s, entry); | |
802 | if (!ret) | |
803 | return 0; | |
804 | } | |
805 | ||
8be0709f DS |
806 | if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { |
807 | t = ns2usecs(iter->ts); | |
808 | usec_rem = do_div(t, USEC_PER_SEC); | |
809 | secs = (unsigned long)t; | |
810 | return trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); | |
811 | } else | |
812 | return trace_seq_printf(s, " %12llu: ", iter->ts); | |
c4a8e8be FW |
813 | } |
814 | ||
815 | int trace_print_lat_context(struct trace_iterator *iter) | |
816 | { | |
817 | u64 next_ts; | |
d9793bd8 | 818 | int ret; |
db4c75cb SR |
819 | /* trace_find_next_entry will reset ent_size */ |
820 | int ent_size = iter->ent_size; | |
c4a8e8be FW |
821 | struct trace_seq *s = &iter->seq; |
822 | struct trace_entry *entry = iter->ent, | |
823 | *next_entry = trace_find_next_entry(iter, NULL, | |
824 | &next_ts); | |
825 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
c4a8e8be | 826 | |
db4c75cb SR |
827 | /* Restore the original ent_size */ |
828 | iter->ent_size = ent_size; | |
829 | ||
c4a8e8be FW |
830 | if (!next_entry) |
831 | next_ts = iter->ts; | |
c4a8e8be FW |
832 | |
833 | if (verbose) { | |
4ca53085 SR |
834 | char comm[TASK_COMM_LEN]; |
835 | ||
836 | trace_find_cmdline(entry->pid, comm); | |
837 | ||
8be0709f DS |
838 | ret = trace_seq_printf( |
839 | s, "%16s %5d %3d %d %08x %08lx ", | |
840 | comm, entry->pid, iter->cpu, entry->flags, | |
841 | entry->preempt_count, iter->idx); | |
c4a8e8be | 842 | } else { |
1830b52d | 843 | ret = lat_print_generic(s, entry, iter->cpu); |
c4a8e8be FW |
844 | } |
845 | ||
8be0709f DS |
846 | if (ret) |
847 | ret = lat_print_timestamp(iter, next_ts); | |
848 | ||
d9793bd8 | 849 | return ret; |
c4a8e8be FW |
850 | } |
851 | ||
f633cef0 SR |
852 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
853 | ||
854 | static int task_state_char(unsigned long state) | |
855 | { | |
856 | int bit = state ? __ffs(state) + 1 : 0; | |
857 | ||
858 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
859 | } | |
860 | ||
f0868d1e SR |
861 | /** |
862 | * ftrace_find_event - find a registered event | |
863 | * @type: the type of event to look for | |
864 | * | |
865 | * Returns an event of type @type otherwise NULL | |
4f535968 | 866 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
867 | */ |
868 | struct trace_event *ftrace_find_event(int type) | |
869 | { | |
870 | struct trace_event *event; | |
f0868d1e SR |
871 | unsigned key; |
872 | ||
873 | key = type & (EVENT_HASHSIZE - 1); | |
874 | ||
b67bfe0d | 875 | hlist_for_each_entry(event, &event_hash[key], node) { |
f0868d1e SR |
876 | if (event->type == type) |
877 | return event; | |
878 | } | |
879 | ||
880 | return NULL; | |
881 | } | |
882 | ||
060fa5c8 SR |
883 | static LIST_HEAD(ftrace_event_list); |
884 | ||
885 | static int trace_search_list(struct list_head **list) | |
886 | { | |
887 | struct trace_event *e; | |
888 | int last = __TRACE_LAST_TYPE; | |
889 | ||
890 | if (list_empty(&ftrace_event_list)) { | |
891 | *list = &ftrace_event_list; | |
892 | return last + 1; | |
893 | } | |
894 | ||
895 | /* | |
896 | * We used up all possible max events, | |
897 | * lets see if somebody freed one. | |
898 | */ | |
899 | list_for_each_entry(e, &ftrace_event_list, list) { | |
900 | if (e->type != last + 1) | |
901 | break; | |
902 | last++; | |
903 | } | |
904 | ||
905 | /* Did we used up all 65 thousand events??? */ | |
906 | if ((last + 1) > FTRACE_MAX_EVENT) | |
907 | return 0; | |
908 | ||
909 | *list = &e->list; | |
910 | return last + 1; | |
911 | } | |
912 | ||
4f535968 LJ |
913 | void trace_event_read_lock(void) |
914 | { | |
52f6ad6d | 915 | down_read(&trace_event_sem); |
4f535968 LJ |
916 | } |
917 | ||
918 | void trace_event_read_unlock(void) | |
919 | { | |
52f6ad6d | 920 | up_read(&trace_event_sem); |
4f535968 LJ |
921 | } |
922 | ||
f0868d1e SR |
923 | /** |
924 | * register_ftrace_event - register output for an event type | |
925 | * @event: the event type to register | |
926 | * | |
927 | * Event types are stored in a hash and this hash is used to | |
928 | * find a way to print an event. If the @event->type is set | |
929 | * then it will use that type, otherwise it will assign a | |
930 | * type to use. | |
931 | * | |
932 | * If you assign your own type, please make sure it is added | |
933 | * to the trace_type enum in trace.h, to avoid collisions | |
934 | * with the dynamic types. | |
935 | * | |
936 | * Returns the event type number or zero on error. | |
937 | */ | |
938 | int register_ftrace_event(struct trace_event *event) | |
939 | { | |
940 | unsigned key; | |
941 | int ret = 0; | |
942 | ||
52f6ad6d | 943 | down_write(&trace_event_sem); |
f0868d1e | 944 | |
060fa5c8 | 945 | if (WARN_ON(!event)) |
28bea271 | 946 | goto out; |
28bea271 | 947 | |
a9a57763 SR |
948 | if (WARN_ON(!event->funcs)) |
949 | goto out; | |
950 | ||
060fa5c8 SR |
951 | INIT_LIST_HEAD(&event->list); |
952 | ||
953 | if (!event->type) { | |
48dd0fed | 954 | struct list_head *list = NULL; |
060fa5c8 SR |
955 | |
956 | if (next_event_type > FTRACE_MAX_EVENT) { | |
957 | ||
958 | event->type = trace_search_list(&list); | |
959 | if (!event->type) | |
960 | goto out; | |
961 | ||
962 | } else { | |
963 | ||
964 | event->type = next_event_type++; | |
965 | list = &ftrace_event_list; | |
966 | } | |
967 | ||
968 | if (WARN_ON(ftrace_find_event(event->type))) | |
969 | goto out; | |
970 | ||
971 | list_add_tail(&event->list, list); | |
972 | ||
973 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
974 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
975 | WARN_ON(1); | |
f0868d1e | 976 | goto out; |
060fa5c8 SR |
977 | } else { |
978 | /* Is this event already used */ | |
979 | if (ftrace_find_event(event->type)) | |
980 | goto out; | |
981 | } | |
f0868d1e | 982 | |
a9a57763 SR |
983 | if (event->funcs->trace == NULL) |
984 | event->funcs->trace = trace_nop_print; | |
985 | if (event->funcs->raw == NULL) | |
986 | event->funcs->raw = trace_nop_print; | |
987 | if (event->funcs->hex == NULL) | |
988 | event->funcs->hex = trace_nop_print; | |
989 | if (event->funcs->binary == NULL) | |
990 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 991 | |
f0868d1e SR |
992 | key = event->type & (EVENT_HASHSIZE - 1); |
993 | ||
4f535968 | 994 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
995 | |
996 | ret = event->type; | |
997 | out: | |
52f6ad6d | 998 | up_write(&trace_event_sem); |
f0868d1e SR |
999 | |
1000 | return ret; | |
1001 | } | |
17c873ec | 1002 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 1003 | |
110bf2b7 | 1004 | /* |
52f6ad6d | 1005 | * Used by module code with the trace_event_sem held for write. |
110bf2b7 SR |
1006 | */ |
1007 | int __unregister_ftrace_event(struct trace_event *event) | |
1008 | { | |
1009 | hlist_del(&event->node); | |
1010 | list_del(&event->list); | |
1011 | return 0; | |
1012 | } | |
1013 | ||
f0868d1e SR |
1014 | /** |
1015 | * unregister_ftrace_event - remove a no longer used event | |
1016 | * @event: the event to remove | |
1017 | */ | |
1018 | int unregister_ftrace_event(struct trace_event *event) | |
1019 | { | |
52f6ad6d | 1020 | down_write(&trace_event_sem); |
110bf2b7 | 1021 | __unregister_ftrace_event(event); |
52f6ad6d | 1022 | up_write(&trace_event_sem); |
f0868d1e SR |
1023 | |
1024 | return 0; | |
1025 | } | |
17c873ec | 1026 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
1027 | |
1028 | /* | |
1029 | * Standard events | |
1030 | */ | |
1031 | ||
a9a57763 SR |
1032 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
1033 | struct trace_event *event) | |
f633cef0 | 1034 | { |
ee5e51f5 JO |
1035 | if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type)) |
1036 | return TRACE_TYPE_PARTIAL_LINE; | |
1037 | ||
d9793bd8 | 1038 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1039 | } |
1040 | ||
1041 | /* TRACE_FN */ | |
a9a57763 SR |
1042 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
1043 | struct trace_event *event) | |
f633cef0 SR |
1044 | { |
1045 | struct ftrace_entry *field; | |
2c9b238e | 1046 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1047 | |
2c9b238e | 1048 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1049 | |
1050 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1051 | goto partial; | |
1052 | ||
1053 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
146c3442 | 1054 | if (!trace_seq_puts(s, " <-")) |
f633cef0 SR |
1055 | goto partial; |
1056 | if (!seq_print_ip_sym(s, | |
1057 | field->parent_ip, | |
1058 | flags)) | |
1059 | goto partial; | |
1060 | } | |
146c3442 | 1061 | if (!trace_seq_putc(s, '\n')) |
f633cef0 SR |
1062 | goto partial; |
1063 | ||
d9793bd8 | 1064 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1065 | |
1066 | partial: | |
1067 | return TRACE_TYPE_PARTIAL_LINE; | |
1068 | } | |
1069 | ||
a9a57763 SR |
1070 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
1071 | struct trace_event *event) | |
f633cef0 SR |
1072 | { |
1073 | struct ftrace_entry *field; | |
1074 | ||
2c9b238e | 1075 | trace_assign_type(field, iter->ent); |
f633cef0 | 1076 | |
2c9b238e | 1077 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
1078 | field->ip, |
1079 | field->parent_ip)) | |
f633cef0 SR |
1080 | return TRACE_TYPE_PARTIAL_LINE; |
1081 | ||
d9793bd8 | 1082 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1083 | } |
1084 | ||
a9a57763 SR |
1085 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
1086 | struct trace_event *event) | |
f633cef0 SR |
1087 | { |
1088 | struct ftrace_entry *field; | |
2c9b238e | 1089 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1090 | |
2c9b238e | 1091 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1092 | |
1093 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
1094 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
1095 | ||
d9793bd8 | 1096 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1097 | } |
1098 | ||
a9a57763 SR |
1099 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
1100 | struct trace_event *event) | |
f633cef0 SR |
1101 | { |
1102 | struct ftrace_entry *field; | |
2c9b238e | 1103 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1104 | |
2c9b238e | 1105 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1106 | |
1107 | SEQ_PUT_FIELD_RET(s, field->ip); | |
1108 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
1109 | ||
d9793bd8 | 1110 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1111 | } |
1112 | ||
a9a57763 | 1113 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 1114 | .trace = trace_fn_trace, |
f633cef0 SR |
1115 | .raw = trace_fn_raw, |
1116 | .hex = trace_fn_hex, | |
1117 | .binary = trace_fn_bin, | |
1118 | }; | |
1119 | ||
a9a57763 SR |
1120 | static struct trace_event trace_fn_event = { |
1121 | .type = TRACE_FN, | |
1122 | .funcs = &trace_fn_funcs, | |
1123 | }; | |
1124 | ||
f633cef0 | 1125 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
1126 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
1127 | char *delim) | |
f633cef0 SR |
1128 | { |
1129 | struct ctx_switch_entry *field; | |
4ca53085 | 1130 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
1131 | int S, T; |
1132 | ||
4ca53085 | 1133 | |
2c9b238e | 1134 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1135 | |
1136 | T = task_state_char(field->next_state); | |
1137 | S = task_state_char(field->prev_state); | |
4ca53085 | 1138 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
1139 | if (!trace_seq_printf(&iter->seq, |
1140 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
1141 | field->prev_pid, |
1142 | field->prev_prio, | |
1143 | S, delim, | |
1144 | field->next_cpu, | |
1145 | field->next_pid, | |
1146 | field->next_prio, | |
1147 | T, comm)) | |
f633cef0 SR |
1148 | return TRACE_TYPE_PARTIAL_LINE; |
1149 | ||
d9793bd8 | 1150 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1151 | } |
1152 | ||
a9a57763 SR |
1153 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
1154 | struct trace_event *event) | |
f633cef0 | 1155 | { |
2c9b238e | 1156 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
1157 | } |
1158 | ||
ae7462b4 | 1159 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 1160 | int flags, struct trace_event *event) |
f633cef0 | 1161 | { |
2c9b238e | 1162 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
1163 | } |
1164 | ||
2c9b238e | 1165 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
1166 | { |
1167 | struct ctx_switch_entry *field; | |
1168 | int T; | |
1169 | ||
2c9b238e | 1170 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1171 | |
1172 | if (!S) | |
b0f56f1a | 1173 | S = task_state_char(field->prev_state); |
f633cef0 | 1174 | T = task_state_char(field->next_state); |
2c9b238e | 1175 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
1176 | field->prev_pid, |
1177 | field->prev_prio, | |
1178 | S, | |
1179 | field->next_cpu, | |
1180 | field->next_pid, | |
1181 | field->next_prio, | |
1182 | T)) | |
f633cef0 SR |
1183 | return TRACE_TYPE_PARTIAL_LINE; |
1184 | ||
d9793bd8 | 1185 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1186 | } |
1187 | ||
a9a57763 SR |
1188 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
1189 | struct trace_event *event) | |
f633cef0 | 1190 | { |
2c9b238e | 1191 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
1192 | } |
1193 | ||
a9a57763 SR |
1194 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
1195 | struct trace_event *event) | |
f633cef0 | 1196 | { |
2c9b238e | 1197 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
1198 | } |
1199 | ||
1200 | ||
2c9b238e | 1201 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
1202 | { |
1203 | struct ctx_switch_entry *field; | |
2c9b238e | 1204 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1205 | int T; |
1206 | ||
2c9b238e | 1207 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1208 | |
1209 | if (!S) | |
b0f56f1a | 1210 | S = task_state_char(field->prev_state); |
f633cef0 SR |
1211 | T = task_state_char(field->next_state); |
1212 | ||
1213 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
1214 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
1215 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
1216 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
1217 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
1218 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
1219 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
1220 | ||
d9793bd8 | 1221 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1222 | } |
1223 | ||
a9a57763 SR |
1224 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1225 | struct trace_event *event) | |
f633cef0 | 1226 | { |
2c9b238e | 1227 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1228 | } |
1229 | ||
a9a57763 SR |
1230 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1231 | struct trace_event *event) | |
f633cef0 | 1232 | { |
2c9b238e | 1233 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1234 | } |
1235 | ||
ae7462b4 | 1236 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1237 | int flags, struct trace_event *event) |
f633cef0 SR |
1238 | { |
1239 | struct ctx_switch_entry *field; | |
2c9b238e | 1240 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1241 | |
2c9b238e | 1242 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1243 | |
1244 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
1245 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
1246 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
1247 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
1248 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
1249 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
1250 | ||
d9793bd8 | 1251 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1252 | } |
1253 | ||
a9a57763 | 1254 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1255 | .trace = trace_ctx_print, |
f633cef0 SR |
1256 | .raw = trace_ctx_raw, |
1257 | .hex = trace_ctx_hex, | |
1258 | .binary = trace_ctxwake_bin, | |
1259 | }; | |
1260 | ||
a9a57763 SR |
1261 | static struct trace_event trace_ctx_event = { |
1262 | .type = TRACE_CTX, | |
1263 | .funcs = &trace_ctx_funcs, | |
1264 | }; | |
1265 | ||
1266 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1267 | .trace = trace_wake_print, |
f633cef0 SR |
1268 | .raw = trace_wake_raw, |
1269 | .hex = trace_wake_hex, | |
1270 | .binary = trace_ctxwake_bin, | |
1271 | }; | |
1272 | ||
a9a57763 SR |
1273 | static struct trace_event trace_wake_event = { |
1274 | .type = TRACE_WAKE, | |
1275 | .funcs = &trace_wake_funcs, | |
1276 | }; | |
1277 | ||
f633cef0 SR |
1278 | /* TRACE_STACK */ |
1279 | ||
ae7462b4 | 1280 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1281 | int flags, struct trace_event *event) |
f633cef0 SR |
1282 | { |
1283 | struct stack_entry *field; | |
2c9b238e | 1284 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1285 | unsigned long *p; |
1286 | unsigned long *end; | |
f633cef0 | 1287 | |
2c9b238e | 1288 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1289 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1290 | |
563af16c | 1291 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1292 | goto partial; |
4a9bd3f1 SR |
1293 | |
1294 | for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { | |
f11b3f4e | 1295 | if (!trace_seq_puts(s, " => ")) |
1296 | goto partial; | |
f633cef0 | 1297 | |
4a9bd3f1 | 1298 | if (!seq_print_ip_sym(s, *p, flags)) |
f11b3f4e | 1299 | goto partial; |
146c3442 | 1300 | if (!trace_seq_putc(s, '\n')) |
f633cef0 SR |
1301 | goto partial; |
1302 | } | |
1303 | ||
d9793bd8 | 1304 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1305 | |
1306 | partial: | |
1307 | return TRACE_TYPE_PARTIAL_LINE; | |
1308 | } | |
1309 | ||
a9a57763 | 1310 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1311 | .trace = trace_stack_print, |
f633cef0 SR |
1312 | }; |
1313 | ||
a9a57763 SR |
1314 | static struct trace_event trace_stack_event = { |
1315 | .type = TRACE_STACK, | |
1316 | .funcs = &trace_stack_funcs, | |
1317 | }; | |
1318 | ||
f633cef0 | 1319 | /* TRACE_USER_STACK */ |
ae7462b4 | 1320 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1321 | int flags, struct trace_event *event) |
f633cef0 SR |
1322 | { |
1323 | struct userstack_entry *field; | |
2c9b238e | 1324 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1325 | |
2c9b238e | 1326 | trace_assign_type(field, iter->ent); |
f633cef0 | 1327 | |
563af16c | 1328 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1329 | goto partial; |
1330 | ||
048dc50c | 1331 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1332 | goto partial; |
1333 | ||
d9793bd8 | 1334 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1335 | |
1336 | partial: | |
1337 | return TRACE_TYPE_PARTIAL_LINE; | |
1338 | } | |
1339 | ||
a9a57763 | 1340 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1341 | .trace = trace_user_stack_print, |
f633cef0 SR |
1342 | }; |
1343 | ||
a9a57763 SR |
1344 | static struct trace_event trace_user_stack_event = { |
1345 | .type = TRACE_USER_STACK, | |
1346 | .funcs = &trace_user_stack_funcs, | |
1347 | }; | |
1348 | ||
09ae7234 SRRH |
1349 | /* TRACE_BPUTS */ |
1350 | static enum print_line_t | |
1351 | trace_bputs_print(struct trace_iterator *iter, int flags, | |
1352 | struct trace_event *event) | |
1353 | { | |
1354 | struct trace_entry *entry = iter->ent; | |
1355 | struct trace_seq *s = &iter->seq; | |
1356 | struct bputs_entry *field; | |
1357 | ||
1358 | trace_assign_type(field, entry); | |
1359 | ||
1360 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1361 | goto partial; | |
1362 | ||
1363 | if (!trace_seq_puts(s, ": ")) | |
1364 | goto partial; | |
1365 | ||
1366 | if (!trace_seq_puts(s, field->str)) | |
1367 | goto partial; | |
1368 | ||
1369 | return TRACE_TYPE_HANDLED; | |
1370 | ||
1371 | partial: | |
1372 | return TRACE_TYPE_PARTIAL_LINE; | |
1373 | } | |
1374 | ||
1375 | ||
1376 | static enum print_line_t | |
1377 | trace_bputs_raw(struct trace_iterator *iter, int flags, | |
1378 | struct trace_event *event) | |
1379 | { | |
1380 | struct bputs_entry *field; | |
1381 | struct trace_seq *s = &iter->seq; | |
1382 | ||
1383 | trace_assign_type(field, iter->ent); | |
1384 | ||
1385 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1386 | goto partial; | |
1387 | ||
1388 | if (!trace_seq_puts(s, field->str)) | |
1389 | goto partial; | |
1390 | ||
1391 | return TRACE_TYPE_HANDLED; | |
1392 | ||
1393 | partial: | |
1394 | return TRACE_TYPE_PARTIAL_LINE; | |
1395 | } | |
1396 | ||
1397 | static struct trace_event_functions trace_bputs_funcs = { | |
1398 | .trace = trace_bputs_print, | |
1399 | .raw = trace_bputs_raw, | |
1400 | }; | |
1401 | ||
1402 | static struct trace_event trace_bputs_event = { | |
1403 | .type = TRACE_BPUTS, | |
1404 | .funcs = &trace_bputs_funcs, | |
1405 | }; | |
1406 | ||
48ead020 | 1407 | /* TRACE_BPRINT */ |
1427cdf0 | 1408 | static enum print_line_t |
a9a57763 SR |
1409 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1410 | struct trace_event *event) | |
1427cdf0 LJ |
1411 | { |
1412 | struct trace_entry *entry = iter->ent; | |
1413 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1414 | struct bprint_entry *field; |
1427cdf0 LJ |
1415 | |
1416 | trace_assign_type(field, entry); | |
1417 | ||
1418 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1419 | goto partial; | |
1420 | ||
1421 | if (!trace_seq_puts(s, ": ")) | |
1422 | goto partial; | |
1423 | ||
1424 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1425 | goto partial; | |
1426 | ||
1427 | return TRACE_TYPE_HANDLED; | |
1428 | ||
1429 | partial: | |
1430 | return TRACE_TYPE_PARTIAL_LINE; | |
1431 | } | |
1432 | ||
769b0441 | 1433 | |
48ead020 | 1434 | static enum print_line_t |
a9a57763 SR |
1435 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1436 | struct trace_event *event) | |
1427cdf0 | 1437 | { |
48ead020 | 1438 | struct bprint_entry *field; |
1427cdf0 | 1439 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1440 | |
769b0441 | 1441 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1442 | |
1443 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1444 | goto partial; | |
1445 | ||
1446 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1447 | goto partial; | |
1448 | ||
1449 | return TRACE_TYPE_HANDLED; | |
1450 | ||
1451 | partial: | |
1452 | return TRACE_TYPE_PARTIAL_LINE; | |
1453 | } | |
1454 | ||
a9a57763 SR |
1455 | static struct trace_event_functions trace_bprint_funcs = { |
1456 | .trace = trace_bprint_print, | |
1457 | .raw = trace_bprint_raw, | |
1458 | }; | |
769b0441 | 1459 | |
48ead020 FW |
1460 | static struct trace_event trace_bprint_event = { |
1461 | .type = TRACE_BPRINT, | |
a9a57763 | 1462 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1463 | }; |
1464 | ||
1465 | /* TRACE_PRINT */ | |
1466 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1467 | int flags, struct trace_event *event) |
48ead020 FW |
1468 | { |
1469 | struct print_entry *field; | |
1470 | struct trace_seq *s = &iter->seq; | |
1471 | ||
1472 | trace_assign_type(field, iter->ent); | |
1473 | ||
1474 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1475 | goto partial; | |
1476 | ||
1477 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1478 | goto partial; | |
1479 | ||
1480 | return TRACE_TYPE_HANDLED; | |
1481 | ||
1482 | partial: | |
1483 | return TRACE_TYPE_PARTIAL_LINE; | |
1484 | } | |
1485 | ||
a9a57763 SR |
1486 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1487 | struct trace_event *event) | |
48ead020 FW |
1488 | { |
1489 | struct print_entry *field; | |
1490 | ||
1491 | trace_assign_type(field, iter->ent); | |
1492 | ||
1493 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1494 | goto partial; | |
1495 | ||
1496 | return TRACE_TYPE_HANDLED; | |
1497 | ||
1498 | partial: | |
1499 | return TRACE_TYPE_PARTIAL_LINE; | |
1500 | } | |
1501 | ||
a9a57763 | 1502 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1503 | .trace = trace_print_print, |
1504 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1505 | }; |
1506 | ||
a9a57763 SR |
1507 | static struct trace_event trace_print_event = { |
1508 | .type = TRACE_PRINT, | |
1509 | .funcs = &trace_print_funcs, | |
1510 | }; | |
1511 | ||
48ead020 | 1512 | |
f633cef0 SR |
1513 | static struct trace_event *events[] __initdata = { |
1514 | &trace_fn_event, | |
1515 | &trace_ctx_event, | |
1516 | &trace_wake_event, | |
f633cef0 SR |
1517 | &trace_stack_event, |
1518 | &trace_user_stack_event, | |
09ae7234 | 1519 | &trace_bputs_event, |
48ead020 | 1520 | &trace_bprint_event, |
f633cef0 SR |
1521 | &trace_print_event, |
1522 | NULL | |
1523 | }; | |
1524 | ||
1525 | __init static int init_events(void) | |
1526 | { | |
1527 | struct trace_event *event; | |
1528 | int i, ret; | |
1529 | ||
1530 | for (i = 0; events[i]; i++) { | |
1531 | event = events[i]; | |
1532 | ||
1533 | ret = register_ftrace_event(event); | |
1534 | if (!ret) { | |
1535 | printk(KERN_WARNING "event %d failed to register\n", | |
1536 | event->type); | |
1537 | WARN_ON_ONCE(1); | |
1538 | } | |
1539 | } | |
1540 | ||
1541 | return 0; | |
1542 | } | |
7374e827 | 1543 | early_initcall(init_events); |