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