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); | |
434 | ret = trace_seq_printf(s, "%s: ", event->name); | |
435 | if (!ret) | |
436 | return TRACE_TYPE_PARTIAL_LINE; | |
437 | ||
438 | return 0; | |
439 | } | |
440 | EXPORT_SYMBOL(ftrace_raw_output_prep); | |
441 | ||
f0868d1e SR |
442 | #ifdef CONFIG_KRETPROBES |
443 | static inline const char *kretprobed(const char *name) | |
444 | { | |
445 | static const char tramp_name[] = "kretprobe_trampoline"; | |
446 | int size = sizeof(tramp_name); | |
447 | ||
448 | if (strncmp(tramp_name, name, size) == 0) | |
449 | return "[unknown/kretprobe'd]"; | |
450 | return name; | |
451 | } | |
452 | #else | |
453 | static inline const char *kretprobed(const char *name) | |
454 | { | |
455 | return name; | |
456 | } | |
457 | #endif /* CONFIG_KRETPROBES */ | |
458 | ||
459 | static int | |
460 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
461 | { | |
462 | #ifdef CONFIG_KALLSYMS | |
463 | char str[KSYM_SYMBOL_LEN]; | |
464 | const char *name; | |
465 | ||
466 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
467 | ||
468 | name = kretprobed(str); | |
469 | ||
470 | return trace_seq_printf(s, fmt, name); | |
471 | #endif | |
472 | return 1; | |
473 | } | |
474 | ||
475 | static int | |
476 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
477 | unsigned long address) | |
478 | { | |
479 | #ifdef CONFIG_KALLSYMS | |
480 | char str[KSYM_SYMBOL_LEN]; | |
481 | const char *name; | |
482 | ||
483 | sprint_symbol(str, address); | |
484 | name = kretprobed(str); | |
485 | ||
486 | return trace_seq_printf(s, fmt, name); | |
487 | #endif | |
488 | return 1; | |
489 | } | |
490 | ||
491 | #ifndef CONFIG_64BIT | |
492 | # define IP_FMT "%08lx" | |
493 | #else | |
494 | # define IP_FMT "%016lx" | |
495 | #endif | |
496 | ||
497 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
498 | unsigned long ip, unsigned long sym_flags) | |
499 | { | |
500 | struct file *file = NULL; | |
501 | unsigned long vmstart = 0; | |
502 | int ret = 1; | |
503 | ||
d184b31c JB |
504 | if (s->full) |
505 | return 0; | |
506 | ||
f0868d1e SR |
507 | if (mm) { |
508 | const struct vm_area_struct *vma; | |
509 | ||
510 | down_read(&mm->mmap_sem); | |
511 | vma = find_vma(mm, ip); | |
512 | if (vma) { | |
513 | file = vma->vm_file; | |
514 | vmstart = vma->vm_start; | |
515 | } | |
516 | if (file) { | |
517 | ret = trace_seq_path(s, &file->f_path); | |
518 | if (ret) | |
519 | ret = trace_seq_printf(s, "[+0x%lx]", | |
520 | ip - vmstart); | |
521 | } | |
522 | up_read(&mm->mmap_sem); | |
523 | } | |
524 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
525 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
526 | return ret; | |
527 | } | |
528 | ||
529 | int | |
530 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
531 | unsigned long sym_flags) | |
532 | { | |
533 | struct mm_struct *mm = NULL; | |
534 | int ret = 1; | |
535 | unsigned int i; | |
536 | ||
537 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
538 | struct task_struct *task; | |
539 | /* | |
540 | * we do the lookup on the thread group leader, | |
541 | * since individual threads might have already quit! | |
542 | */ | |
543 | rcu_read_lock(); | |
48659d31 | 544 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
545 | if (task) |
546 | mm = get_task_mm(task); | |
547 | rcu_read_unlock(); | |
548 | } | |
549 | ||
550 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
551 | unsigned long ip = entry->caller[i]; | |
552 | ||
553 | if (ip == ULONG_MAX || !ret) | |
554 | break; | |
048dc50c | 555 | if (ret) |
556 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
557 | if (!ip) { |
558 | if (ret) | |
559 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 560 | if (ret) |
146c3442 | 561 | ret = trace_seq_putc(s, '\n'); |
f0868d1e SR |
562 | continue; |
563 | } | |
564 | if (!ret) | |
565 | break; | |
566 | if (ret) | |
567 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
146c3442 | 568 | ret = trace_seq_putc(s, '\n'); |
f0868d1e SR |
569 | } |
570 | ||
571 | if (mm) | |
572 | mmput(mm); | |
573 | return ret; | |
574 | } | |
575 | ||
576 | int | |
577 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
578 | { | |
579 | int ret; | |
580 | ||
581 | if (!ip) | |
146c3442 | 582 | return trace_seq_putc(s, '0'); |
f0868d1e SR |
583 | |
584 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
585 | ret = seq_print_sym_offset(s, "%s", ip); | |
586 | else | |
587 | ret = seq_print_sym_short(s, "%s", ip); | |
588 | ||
589 | if (!ret) | |
590 | return 0; | |
591 | ||
592 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
593 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
594 | return ret; | |
595 | } | |
596 | ||
f81c972d SR |
597 | /** |
598 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
599 | * @s: trace seq struct to write to | |
600 | * @entry: The trace entry field from the ring buffer | |
601 | * | |
602 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 603 | * count. |
f81c972d SR |
604 | */ |
605 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 606 | { |
10da37a6 DS |
607 | char hardsoft_irq; |
608 | char need_resched; | |
609 | char irqs_off; | |
610 | int hardirq; | |
611 | int softirq; | |
637e7e86 | 612 | int ret; |
c4a8e8be | 613 | |
c4a8e8be FW |
614 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
615 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 616 | |
10da37a6 DS |
617 | irqs_off = |
618 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
619 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
620 | '.'; | |
e5137b50 PZ |
621 | |
622 | switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | | |
623 | TRACE_FLAG_PREEMPT_RESCHED)) { | |
624 | case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: | |
625 | need_resched = 'N'; | |
626 | break; | |
627 | case TRACE_FLAG_NEED_RESCHED: | |
628 | need_resched = 'n'; | |
629 | break; | |
630 | case TRACE_FLAG_PREEMPT_RESCHED: | |
631 | need_resched = 'p'; | |
632 | break; | |
633 | default: | |
634 | need_resched = '.'; | |
635 | break; | |
636 | } | |
637 | ||
10da37a6 DS |
638 | hardsoft_irq = |
639 | (hardirq && softirq) ? 'H' : | |
640 | hardirq ? 'h' : | |
641 | softirq ? 's' : | |
642 | '.'; | |
643 | ||
f81c972d | 644 | if (!trace_seq_printf(s, "%c%c%c", |
10da37a6 | 645 | irqs_off, need_resched, hardsoft_irq)) |
d9793bd8 | 646 | return 0; |
c4a8e8be | 647 | |
829b876d SR |
648 | if (entry->preempt_count) |
649 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 650 | else |
829b876d SR |
651 | ret = trace_seq_putc(s, '.'); |
652 | ||
e6e1e259 | 653 | return ret; |
c4a8e8be FW |
654 | } |
655 | ||
f81c972d SR |
656 | static int |
657 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
658 | { | |
659 | char comm[TASK_COMM_LEN]; | |
660 | ||
661 | trace_find_cmdline(entry->pid, comm); | |
662 | ||
663 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
664 | comm, entry->pid, cpu)) | |
665 | return 0; | |
666 | ||
667 | return trace_print_lat_fmt(s, entry); | |
668 | } | |
669 | ||
8be0709f | 670 | static unsigned long preempt_mark_thresh_us = 100; |
c4a8e8be | 671 | |
d9793bd8 | 672 | static int |
8be0709f | 673 | lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
c4a8e8be | 674 | { |
8be0709f DS |
675 | unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE; |
676 | unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; | |
12883efb | 677 | unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start; |
8be0709f DS |
678 | unsigned long long rel_ts = next_ts - iter->ts; |
679 | struct trace_seq *s = &iter->seq; | |
680 | ||
681 | if (in_ns) { | |
682 | abs_ts = ns2usecs(abs_ts); | |
683 | rel_ts = ns2usecs(rel_ts); | |
684 | } | |
685 | ||
686 | if (verbose && in_ns) { | |
687 | unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); | |
688 | unsigned long abs_msec = (unsigned long)abs_ts; | |
689 | unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); | |
690 | unsigned long rel_msec = (unsigned long)rel_ts; | |
691 | ||
692 | return trace_seq_printf( | |
693 | s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", | |
694 | ns2usecs(iter->ts), | |
695 | abs_msec, abs_usec, | |
696 | rel_msec, rel_usec); | |
697 | } else if (verbose && !in_ns) { | |
698 | return trace_seq_printf( | |
699 | s, "[%016llx] %lld (+%lld): ", | |
700 | iter->ts, abs_ts, rel_ts); | |
701 | } else if (!verbose && in_ns) { | |
702 | return trace_seq_printf( | |
703 | s, " %4lldus%c: ", | |
704 | abs_ts, | |
705 | rel_ts > preempt_mark_thresh_us ? '!' : | |
706 | rel_ts > 1 ? '+' : ' '); | |
707 | } else { /* !verbose && !in_ns */ | |
708 | return trace_seq_printf(s, " %4lld: ", abs_ts); | |
709 | } | |
c4a8e8be FW |
710 | } |
711 | ||
712 | int trace_print_context(struct trace_iterator *iter) | |
713 | { | |
714 | struct trace_seq *s = &iter->seq; | |
715 | struct trace_entry *entry = iter->ent; | |
8be0709f DS |
716 | unsigned long long t; |
717 | unsigned long secs, usec_rem; | |
4ca53085 | 718 | char comm[TASK_COMM_LEN]; |
77271ce4 | 719 | int ret; |
4ca53085 SR |
720 | |
721 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 722 | |
77271ce4 SR |
723 | ret = trace_seq_printf(s, "%16s-%-5d [%03d] ", |
724 | comm, entry->pid, iter->cpu); | |
725 | if (!ret) | |
726 | return 0; | |
727 | ||
728 | if (trace_flags & TRACE_ITER_IRQ_INFO) { | |
729 | ret = trace_print_lat_fmt(s, entry); | |
730 | if (!ret) | |
731 | return 0; | |
732 | } | |
733 | ||
8be0709f DS |
734 | if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { |
735 | t = ns2usecs(iter->ts); | |
736 | usec_rem = do_div(t, USEC_PER_SEC); | |
737 | secs = (unsigned long)t; | |
738 | return trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); | |
739 | } else | |
740 | return trace_seq_printf(s, " %12llu: ", iter->ts); | |
c4a8e8be FW |
741 | } |
742 | ||
743 | int trace_print_lat_context(struct trace_iterator *iter) | |
744 | { | |
745 | u64 next_ts; | |
d9793bd8 | 746 | int ret; |
db4c75cb SR |
747 | /* trace_find_next_entry will reset ent_size */ |
748 | int ent_size = iter->ent_size; | |
c4a8e8be FW |
749 | struct trace_seq *s = &iter->seq; |
750 | struct trace_entry *entry = iter->ent, | |
751 | *next_entry = trace_find_next_entry(iter, NULL, | |
752 | &next_ts); | |
753 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
c4a8e8be | 754 | |
db4c75cb SR |
755 | /* Restore the original ent_size */ |
756 | iter->ent_size = ent_size; | |
757 | ||
c4a8e8be FW |
758 | if (!next_entry) |
759 | next_ts = iter->ts; | |
c4a8e8be FW |
760 | |
761 | if (verbose) { | |
4ca53085 SR |
762 | char comm[TASK_COMM_LEN]; |
763 | ||
764 | trace_find_cmdline(entry->pid, comm); | |
765 | ||
8be0709f DS |
766 | ret = trace_seq_printf( |
767 | s, "%16s %5d %3d %d %08x %08lx ", | |
768 | comm, entry->pid, iter->cpu, entry->flags, | |
769 | entry->preempt_count, iter->idx); | |
c4a8e8be | 770 | } else { |
1830b52d | 771 | ret = lat_print_generic(s, entry, iter->cpu); |
c4a8e8be FW |
772 | } |
773 | ||
8be0709f DS |
774 | if (ret) |
775 | ret = lat_print_timestamp(iter, next_ts); | |
776 | ||
d9793bd8 | 777 | return ret; |
c4a8e8be FW |
778 | } |
779 | ||
f633cef0 SR |
780 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
781 | ||
782 | static int task_state_char(unsigned long state) | |
783 | { | |
784 | int bit = state ? __ffs(state) + 1 : 0; | |
785 | ||
786 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
787 | } | |
788 | ||
f0868d1e SR |
789 | /** |
790 | * ftrace_find_event - find a registered event | |
791 | * @type: the type of event to look for | |
792 | * | |
793 | * Returns an event of type @type otherwise NULL | |
4f535968 | 794 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
795 | */ |
796 | struct trace_event *ftrace_find_event(int type) | |
797 | { | |
798 | struct trace_event *event; | |
f0868d1e SR |
799 | unsigned key; |
800 | ||
801 | key = type & (EVENT_HASHSIZE - 1); | |
802 | ||
b67bfe0d | 803 | hlist_for_each_entry(event, &event_hash[key], node) { |
f0868d1e SR |
804 | if (event->type == type) |
805 | return event; | |
806 | } | |
807 | ||
808 | return NULL; | |
809 | } | |
810 | ||
060fa5c8 SR |
811 | static LIST_HEAD(ftrace_event_list); |
812 | ||
813 | static int trace_search_list(struct list_head **list) | |
814 | { | |
815 | struct trace_event *e; | |
816 | int last = __TRACE_LAST_TYPE; | |
817 | ||
818 | if (list_empty(&ftrace_event_list)) { | |
819 | *list = &ftrace_event_list; | |
820 | return last + 1; | |
821 | } | |
822 | ||
823 | /* | |
824 | * We used up all possible max events, | |
825 | * lets see if somebody freed one. | |
826 | */ | |
827 | list_for_each_entry(e, &ftrace_event_list, list) { | |
828 | if (e->type != last + 1) | |
829 | break; | |
830 | last++; | |
831 | } | |
832 | ||
833 | /* Did we used up all 65 thousand events??? */ | |
834 | if ((last + 1) > FTRACE_MAX_EVENT) | |
835 | return 0; | |
836 | ||
837 | *list = &e->list; | |
838 | return last + 1; | |
839 | } | |
840 | ||
4f535968 LJ |
841 | void trace_event_read_lock(void) |
842 | { | |
52f6ad6d | 843 | down_read(&trace_event_sem); |
4f535968 LJ |
844 | } |
845 | ||
846 | void trace_event_read_unlock(void) | |
847 | { | |
52f6ad6d | 848 | up_read(&trace_event_sem); |
4f535968 LJ |
849 | } |
850 | ||
f0868d1e SR |
851 | /** |
852 | * register_ftrace_event - register output for an event type | |
853 | * @event: the event type to register | |
854 | * | |
855 | * Event types are stored in a hash and this hash is used to | |
856 | * find a way to print an event. If the @event->type is set | |
857 | * then it will use that type, otherwise it will assign a | |
858 | * type to use. | |
859 | * | |
860 | * If you assign your own type, please make sure it is added | |
861 | * to the trace_type enum in trace.h, to avoid collisions | |
862 | * with the dynamic types. | |
863 | * | |
864 | * Returns the event type number or zero on error. | |
865 | */ | |
866 | int register_ftrace_event(struct trace_event *event) | |
867 | { | |
868 | unsigned key; | |
869 | int ret = 0; | |
870 | ||
52f6ad6d | 871 | down_write(&trace_event_sem); |
f0868d1e | 872 | |
060fa5c8 | 873 | if (WARN_ON(!event)) |
28bea271 | 874 | goto out; |
28bea271 | 875 | |
a9a57763 SR |
876 | if (WARN_ON(!event->funcs)) |
877 | goto out; | |
878 | ||
060fa5c8 SR |
879 | INIT_LIST_HEAD(&event->list); |
880 | ||
881 | if (!event->type) { | |
48dd0fed | 882 | struct list_head *list = NULL; |
060fa5c8 SR |
883 | |
884 | if (next_event_type > FTRACE_MAX_EVENT) { | |
885 | ||
886 | event->type = trace_search_list(&list); | |
887 | if (!event->type) | |
888 | goto out; | |
889 | ||
890 | } else { | |
891 | ||
892 | event->type = next_event_type++; | |
893 | list = &ftrace_event_list; | |
894 | } | |
895 | ||
896 | if (WARN_ON(ftrace_find_event(event->type))) | |
897 | goto out; | |
898 | ||
899 | list_add_tail(&event->list, list); | |
900 | ||
901 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
902 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
903 | WARN_ON(1); | |
f0868d1e | 904 | goto out; |
060fa5c8 SR |
905 | } else { |
906 | /* Is this event already used */ | |
907 | if (ftrace_find_event(event->type)) | |
908 | goto out; | |
909 | } | |
f0868d1e | 910 | |
a9a57763 SR |
911 | if (event->funcs->trace == NULL) |
912 | event->funcs->trace = trace_nop_print; | |
913 | if (event->funcs->raw == NULL) | |
914 | event->funcs->raw = trace_nop_print; | |
915 | if (event->funcs->hex == NULL) | |
916 | event->funcs->hex = trace_nop_print; | |
917 | if (event->funcs->binary == NULL) | |
918 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 919 | |
f0868d1e SR |
920 | key = event->type & (EVENT_HASHSIZE - 1); |
921 | ||
4f535968 | 922 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
923 | |
924 | ret = event->type; | |
925 | out: | |
52f6ad6d | 926 | up_write(&trace_event_sem); |
f0868d1e SR |
927 | |
928 | return ret; | |
929 | } | |
17c873ec | 930 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 931 | |
110bf2b7 | 932 | /* |
52f6ad6d | 933 | * Used by module code with the trace_event_sem held for write. |
110bf2b7 SR |
934 | */ |
935 | int __unregister_ftrace_event(struct trace_event *event) | |
936 | { | |
937 | hlist_del(&event->node); | |
938 | list_del(&event->list); | |
939 | return 0; | |
940 | } | |
941 | ||
f0868d1e SR |
942 | /** |
943 | * unregister_ftrace_event - remove a no longer used event | |
944 | * @event: the event to remove | |
945 | */ | |
946 | int unregister_ftrace_event(struct trace_event *event) | |
947 | { | |
52f6ad6d | 948 | down_write(&trace_event_sem); |
110bf2b7 | 949 | __unregister_ftrace_event(event); |
52f6ad6d | 950 | up_write(&trace_event_sem); |
f0868d1e SR |
951 | |
952 | return 0; | |
953 | } | |
17c873ec | 954 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
955 | |
956 | /* | |
957 | * Standard events | |
958 | */ | |
959 | ||
a9a57763 SR |
960 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
961 | struct trace_event *event) | |
f633cef0 | 962 | { |
ee5e51f5 JO |
963 | if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type)) |
964 | return TRACE_TYPE_PARTIAL_LINE; | |
965 | ||
d9793bd8 | 966 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
967 | } |
968 | ||
969 | /* TRACE_FN */ | |
a9a57763 SR |
970 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
971 | struct trace_event *event) | |
f633cef0 SR |
972 | { |
973 | struct ftrace_entry *field; | |
2c9b238e | 974 | struct trace_seq *s = &iter->seq; |
f633cef0 | 975 | |
2c9b238e | 976 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
977 | |
978 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
979 | goto partial; | |
980 | ||
981 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
146c3442 | 982 | if (!trace_seq_puts(s, " <-")) |
f633cef0 SR |
983 | goto partial; |
984 | if (!seq_print_ip_sym(s, | |
985 | field->parent_ip, | |
986 | flags)) | |
987 | goto partial; | |
988 | } | |
146c3442 | 989 | if (!trace_seq_putc(s, '\n')) |
f633cef0 SR |
990 | goto partial; |
991 | ||
d9793bd8 | 992 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
993 | |
994 | partial: | |
995 | return TRACE_TYPE_PARTIAL_LINE; | |
996 | } | |
997 | ||
a9a57763 SR |
998 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
999 | struct trace_event *event) | |
f633cef0 SR |
1000 | { |
1001 | struct ftrace_entry *field; | |
1002 | ||
2c9b238e | 1003 | trace_assign_type(field, iter->ent); |
f633cef0 | 1004 | |
2c9b238e | 1005 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
1006 | field->ip, |
1007 | field->parent_ip)) | |
f633cef0 SR |
1008 | return TRACE_TYPE_PARTIAL_LINE; |
1009 | ||
d9793bd8 | 1010 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1011 | } |
1012 | ||
a9a57763 SR |
1013 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
1014 | struct trace_event *event) | |
f633cef0 SR |
1015 | { |
1016 | struct ftrace_entry *field; | |
2c9b238e | 1017 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1018 | |
2c9b238e | 1019 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1020 | |
1021 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
1022 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
1023 | ||
d9793bd8 | 1024 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1025 | } |
1026 | ||
a9a57763 SR |
1027 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
1028 | struct trace_event *event) | |
f633cef0 SR |
1029 | { |
1030 | struct ftrace_entry *field; | |
2c9b238e | 1031 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1032 | |
2c9b238e | 1033 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1034 | |
1035 | SEQ_PUT_FIELD_RET(s, field->ip); | |
1036 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
1037 | ||
d9793bd8 | 1038 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1039 | } |
1040 | ||
a9a57763 | 1041 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 1042 | .trace = trace_fn_trace, |
f633cef0 SR |
1043 | .raw = trace_fn_raw, |
1044 | .hex = trace_fn_hex, | |
1045 | .binary = trace_fn_bin, | |
1046 | }; | |
1047 | ||
a9a57763 SR |
1048 | static struct trace_event trace_fn_event = { |
1049 | .type = TRACE_FN, | |
1050 | .funcs = &trace_fn_funcs, | |
1051 | }; | |
1052 | ||
f633cef0 | 1053 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
1054 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
1055 | char *delim) | |
f633cef0 SR |
1056 | { |
1057 | struct ctx_switch_entry *field; | |
4ca53085 | 1058 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
1059 | int S, T; |
1060 | ||
4ca53085 | 1061 | |
2c9b238e | 1062 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1063 | |
1064 | T = task_state_char(field->next_state); | |
1065 | S = task_state_char(field->prev_state); | |
4ca53085 | 1066 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
1067 | if (!trace_seq_printf(&iter->seq, |
1068 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
1069 | field->prev_pid, |
1070 | field->prev_prio, | |
1071 | S, delim, | |
1072 | field->next_cpu, | |
1073 | field->next_pid, | |
1074 | field->next_prio, | |
1075 | T, comm)) | |
f633cef0 SR |
1076 | return TRACE_TYPE_PARTIAL_LINE; |
1077 | ||
d9793bd8 | 1078 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1079 | } |
1080 | ||
a9a57763 SR |
1081 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
1082 | struct trace_event *event) | |
f633cef0 | 1083 | { |
2c9b238e | 1084 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
1085 | } |
1086 | ||
ae7462b4 | 1087 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 1088 | int flags, struct trace_event *event) |
f633cef0 | 1089 | { |
2c9b238e | 1090 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
1091 | } |
1092 | ||
2c9b238e | 1093 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
1094 | { |
1095 | struct ctx_switch_entry *field; | |
1096 | int T; | |
1097 | ||
2c9b238e | 1098 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1099 | |
1100 | if (!S) | |
b0f56f1a | 1101 | S = task_state_char(field->prev_state); |
f633cef0 | 1102 | T = task_state_char(field->next_state); |
2c9b238e | 1103 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
1104 | field->prev_pid, |
1105 | field->prev_prio, | |
1106 | S, | |
1107 | field->next_cpu, | |
1108 | field->next_pid, | |
1109 | field->next_prio, | |
1110 | T)) | |
f633cef0 SR |
1111 | return TRACE_TYPE_PARTIAL_LINE; |
1112 | ||
d9793bd8 | 1113 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1114 | } |
1115 | ||
a9a57763 SR |
1116 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
1117 | struct trace_event *event) | |
f633cef0 | 1118 | { |
2c9b238e | 1119 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
1120 | } |
1121 | ||
a9a57763 SR |
1122 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
1123 | struct trace_event *event) | |
f633cef0 | 1124 | { |
2c9b238e | 1125 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
1126 | } |
1127 | ||
1128 | ||
2c9b238e | 1129 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
1130 | { |
1131 | struct ctx_switch_entry *field; | |
2c9b238e | 1132 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1133 | int T; |
1134 | ||
2c9b238e | 1135 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1136 | |
1137 | if (!S) | |
b0f56f1a | 1138 | S = task_state_char(field->prev_state); |
f633cef0 SR |
1139 | T = task_state_char(field->next_state); |
1140 | ||
1141 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
1142 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
1143 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
1144 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
1145 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
1146 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
1147 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
1148 | ||
d9793bd8 | 1149 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1150 | } |
1151 | ||
a9a57763 SR |
1152 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1153 | struct trace_event *event) | |
f633cef0 | 1154 | { |
2c9b238e | 1155 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1156 | } |
1157 | ||
a9a57763 SR |
1158 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1159 | struct trace_event *event) | |
f633cef0 | 1160 | { |
2c9b238e | 1161 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1162 | } |
1163 | ||
ae7462b4 | 1164 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1165 | int flags, struct trace_event *event) |
f633cef0 SR |
1166 | { |
1167 | struct ctx_switch_entry *field; | |
2c9b238e | 1168 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1169 | |
2c9b238e | 1170 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1171 | |
1172 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
1173 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
1174 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
1175 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
1176 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
1177 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
1178 | ||
d9793bd8 | 1179 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1180 | } |
1181 | ||
a9a57763 | 1182 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1183 | .trace = trace_ctx_print, |
f633cef0 SR |
1184 | .raw = trace_ctx_raw, |
1185 | .hex = trace_ctx_hex, | |
1186 | .binary = trace_ctxwake_bin, | |
1187 | }; | |
1188 | ||
a9a57763 SR |
1189 | static struct trace_event trace_ctx_event = { |
1190 | .type = TRACE_CTX, | |
1191 | .funcs = &trace_ctx_funcs, | |
1192 | }; | |
1193 | ||
1194 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1195 | .trace = trace_wake_print, |
f633cef0 SR |
1196 | .raw = trace_wake_raw, |
1197 | .hex = trace_wake_hex, | |
1198 | .binary = trace_ctxwake_bin, | |
1199 | }; | |
1200 | ||
a9a57763 SR |
1201 | static struct trace_event trace_wake_event = { |
1202 | .type = TRACE_WAKE, | |
1203 | .funcs = &trace_wake_funcs, | |
1204 | }; | |
1205 | ||
f633cef0 SR |
1206 | /* TRACE_STACK */ |
1207 | ||
ae7462b4 | 1208 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1209 | int flags, struct trace_event *event) |
f633cef0 SR |
1210 | { |
1211 | struct stack_entry *field; | |
2c9b238e | 1212 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1213 | unsigned long *p; |
1214 | unsigned long *end; | |
f633cef0 | 1215 | |
2c9b238e | 1216 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1217 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1218 | |
563af16c | 1219 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1220 | goto partial; |
4a9bd3f1 SR |
1221 | |
1222 | for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { | |
f11b3f4e | 1223 | if (!trace_seq_puts(s, " => ")) |
1224 | goto partial; | |
f633cef0 | 1225 | |
4a9bd3f1 | 1226 | if (!seq_print_ip_sym(s, *p, flags)) |
f11b3f4e | 1227 | goto partial; |
146c3442 | 1228 | if (!trace_seq_putc(s, '\n')) |
f633cef0 SR |
1229 | goto partial; |
1230 | } | |
1231 | ||
d9793bd8 | 1232 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1233 | |
1234 | partial: | |
1235 | return TRACE_TYPE_PARTIAL_LINE; | |
1236 | } | |
1237 | ||
a9a57763 | 1238 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1239 | .trace = trace_stack_print, |
f633cef0 SR |
1240 | }; |
1241 | ||
a9a57763 SR |
1242 | static struct trace_event trace_stack_event = { |
1243 | .type = TRACE_STACK, | |
1244 | .funcs = &trace_stack_funcs, | |
1245 | }; | |
1246 | ||
f633cef0 | 1247 | /* TRACE_USER_STACK */ |
ae7462b4 | 1248 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1249 | int flags, struct trace_event *event) |
f633cef0 SR |
1250 | { |
1251 | struct userstack_entry *field; | |
2c9b238e | 1252 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1253 | |
2c9b238e | 1254 | trace_assign_type(field, iter->ent); |
f633cef0 | 1255 | |
563af16c | 1256 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1257 | goto partial; |
1258 | ||
048dc50c | 1259 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1260 | goto partial; |
1261 | ||
d9793bd8 | 1262 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1263 | |
1264 | partial: | |
1265 | return TRACE_TYPE_PARTIAL_LINE; | |
1266 | } | |
1267 | ||
a9a57763 | 1268 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1269 | .trace = trace_user_stack_print, |
f633cef0 SR |
1270 | }; |
1271 | ||
a9a57763 SR |
1272 | static struct trace_event trace_user_stack_event = { |
1273 | .type = TRACE_USER_STACK, | |
1274 | .funcs = &trace_user_stack_funcs, | |
1275 | }; | |
1276 | ||
09ae7234 SRRH |
1277 | /* TRACE_BPUTS */ |
1278 | static enum print_line_t | |
1279 | trace_bputs_print(struct trace_iterator *iter, int flags, | |
1280 | struct trace_event *event) | |
1281 | { | |
1282 | struct trace_entry *entry = iter->ent; | |
1283 | struct trace_seq *s = &iter->seq; | |
1284 | struct bputs_entry *field; | |
1285 | ||
1286 | trace_assign_type(field, entry); | |
1287 | ||
1288 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1289 | goto partial; | |
1290 | ||
1291 | if (!trace_seq_puts(s, ": ")) | |
1292 | goto partial; | |
1293 | ||
1294 | if (!trace_seq_puts(s, field->str)) | |
1295 | goto partial; | |
1296 | ||
1297 | return TRACE_TYPE_HANDLED; | |
1298 | ||
1299 | partial: | |
1300 | return TRACE_TYPE_PARTIAL_LINE; | |
1301 | } | |
1302 | ||
1303 | ||
1304 | static enum print_line_t | |
1305 | trace_bputs_raw(struct trace_iterator *iter, int flags, | |
1306 | struct trace_event *event) | |
1307 | { | |
1308 | struct bputs_entry *field; | |
1309 | struct trace_seq *s = &iter->seq; | |
1310 | ||
1311 | trace_assign_type(field, iter->ent); | |
1312 | ||
1313 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1314 | goto partial; | |
1315 | ||
1316 | if (!trace_seq_puts(s, field->str)) | |
1317 | goto partial; | |
1318 | ||
1319 | return TRACE_TYPE_HANDLED; | |
1320 | ||
1321 | partial: | |
1322 | return TRACE_TYPE_PARTIAL_LINE; | |
1323 | } | |
1324 | ||
1325 | static struct trace_event_functions trace_bputs_funcs = { | |
1326 | .trace = trace_bputs_print, | |
1327 | .raw = trace_bputs_raw, | |
1328 | }; | |
1329 | ||
1330 | static struct trace_event trace_bputs_event = { | |
1331 | .type = TRACE_BPUTS, | |
1332 | .funcs = &trace_bputs_funcs, | |
1333 | }; | |
1334 | ||
48ead020 | 1335 | /* TRACE_BPRINT */ |
1427cdf0 | 1336 | static enum print_line_t |
a9a57763 SR |
1337 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1338 | struct trace_event *event) | |
1427cdf0 LJ |
1339 | { |
1340 | struct trace_entry *entry = iter->ent; | |
1341 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1342 | struct bprint_entry *field; |
1427cdf0 LJ |
1343 | |
1344 | trace_assign_type(field, entry); | |
1345 | ||
1346 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1347 | goto partial; | |
1348 | ||
1349 | if (!trace_seq_puts(s, ": ")) | |
1350 | goto partial; | |
1351 | ||
1352 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1353 | goto partial; | |
1354 | ||
1355 | return TRACE_TYPE_HANDLED; | |
1356 | ||
1357 | partial: | |
1358 | return TRACE_TYPE_PARTIAL_LINE; | |
1359 | } | |
1360 | ||
769b0441 | 1361 | |
48ead020 | 1362 | static enum print_line_t |
a9a57763 SR |
1363 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1364 | struct trace_event *event) | |
1427cdf0 | 1365 | { |
48ead020 | 1366 | struct bprint_entry *field; |
1427cdf0 | 1367 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1368 | |
769b0441 | 1369 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1370 | |
1371 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1372 | goto partial; | |
1373 | ||
1374 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1375 | goto partial; | |
1376 | ||
1377 | return TRACE_TYPE_HANDLED; | |
1378 | ||
1379 | partial: | |
1380 | return TRACE_TYPE_PARTIAL_LINE; | |
1381 | } | |
1382 | ||
a9a57763 SR |
1383 | static struct trace_event_functions trace_bprint_funcs = { |
1384 | .trace = trace_bprint_print, | |
1385 | .raw = trace_bprint_raw, | |
1386 | }; | |
769b0441 | 1387 | |
48ead020 FW |
1388 | static struct trace_event trace_bprint_event = { |
1389 | .type = TRACE_BPRINT, | |
a9a57763 | 1390 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1391 | }; |
1392 | ||
1393 | /* TRACE_PRINT */ | |
1394 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1395 | int flags, struct trace_event *event) |
48ead020 FW |
1396 | { |
1397 | struct print_entry *field; | |
1398 | struct trace_seq *s = &iter->seq; | |
1399 | ||
1400 | trace_assign_type(field, iter->ent); | |
1401 | ||
1402 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1403 | goto partial; | |
1404 | ||
1405 | if (!trace_seq_printf(s, ": %s", 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 enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1415 | struct trace_event *event) | |
48ead020 FW |
1416 | { |
1417 | struct print_entry *field; | |
1418 | ||
1419 | trace_assign_type(field, iter->ent); | |
1420 | ||
1421 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1422 | goto partial; | |
1423 | ||
1424 | return TRACE_TYPE_HANDLED; | |
1425 | ||
1426 | partial: | |
1427 | return TRACE_TYPE_PARTIAL_LINE; | |
1428 | } | |
1429 | ||
a9a57763 | 1430 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1431 | .trace = trace_print_print, |
1432 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1433 | }; |
1434 | ||
a9a57763 SR |
1435 | static struct trace_event trace_print_event = { |
1436 | .type = TRACE_PRINT, | |
1437 | .funcs = &trace_print_funcs, | |
1438 | }; | |
1439 | ||
48ead020 | 1440 | |
f633cef0 SR |
1441 | static struct trace_event *events[] __initdata = { |
1442 | &trace_fn_event, | |
1443 | &trace_ctx_event, | |
1444 | &trace_wake_event, | |
f633cef0 SR |
1445 | &trace_stack_event, |
1446 | &trace_user_stack_event, | |
09ae7234 | 1447 | &trace_bputs_event, |
48ead020 | 1448 | &trace_bprint_event, |
f633cef0 SR |
1449 | &trace_print_event, |
1450 | NULL | |
1451 | }; | |
1452 | ||
1453 | __init static int init_events(void) | |
1454 | { | |
1455 | struct trace_event *event; | |
1456 | int i, ret; | |
1457 | ||
1458 | for (i = 0; events[i]; i++) { | |
1459 | event = events[i]; | |
1460 | ||
1461 | ret = register_ftrace_event(event); | |
1462 | if (!ret) { | |
1463 | printk(KERN_WARNING "event %d failed to register\n", | |
1464 | event->type); | |
1465 | WARN_ON_ONCE(1); | |
1466 | } | |
1467 | } | |
1468 | ||
1469 | return 0; | |
1470 | } | |
7374e827 | 1471 | early_initcall(init_events); |