Commit | Line | Data |
---|---|---|
f0868d1e SR |
1 | /* |
2 | * trace_output.c | |
3 | * | |
4 | * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/mutex.h> | |
10 | #include <linux/ftrace.h> | |
11 | ||
12 | #include "trace_output.h" | |
13 | ||
14 | /* must be a power of 2 */ | |
15 | #define EVENT_HASHSIZE 128 | |
16 | ||
110bf2b7 | 17 | DECLARE_RWSEM(trace_event_mutex); |
be74b73a | 18 | |
f0868d1e SR |
19 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; |
20 | ||
21 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
22 | ||
a63ce5b3 | 23 | int trace_print_seq(struct seq_file *m, struct trace_seq *s) |
0706f1c4 SR |
24 | { |
25 | int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len; | |
a63ce5b3 SR |
26 | int ret; |
27 | ||
28 | ret = seq_write(m, s->buffer, len); | |
0706f1c4 | 29 | |
a63ce5b3 SR |
30 | /* |
31 | * Only reset this buffer if we successfully wrote to the | |
32 | * seq_file buffer. | |
33 | */ | |
34 | if (!ret) | |
35 | trace_seq_init(s); | |
0706f1c4 | 36 | |
a63ce5b3 | 37 | return ret; |
0706f1c4 SR |
38 | } |
39 | ||
5ef841f6 SR |
40 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
41 | { | |
42 | struct trace_seq *s = &iter->seq; | |
43 | struct trace_entry *entry = iter->ent; | |
44 | struct bprint_entry *field; | |
45 | int ret; | |
46 | ||
47 | trace_assign_type(field, entry); | |
48 | ||
49 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
50 | if (!ret) | |
51 | return TRACE_TYPE_PARTIAL_LINE; | |
52 | ||
53 | return TRACE_TYPE_HANDLED; | |
54 | } | |
55 | ||
56 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
57 | { | |
58 | struct trace_seq *s = &iter->seq; | |
59 | struct trace_entry *entry = iter->ent; | |
60 | struct print_entry *field; | |
61 | int ret; | |
62 | ||
63 | trace_assign_type(field, entry); | |
64 | ||
65 | ret = trace_seq_printf(s, "%s", field->buf); | |
66 | if (!ret) | |
67 | return TRACE_TYPE_PARTIAL_LINE; | |
68 | ||
69 | return TRACE_TYPE_HANDLED; | |
70 | } | |
71 | ||
f0868d1e SR |
72 | /** |
73 | * trace_seq_printf - sequence printing of trace information | |
74 | * @s: trace sequence descriptor | |
75 | * @fmt: printf format string | |
76 | * | |
3e69533b JO |
77 | * It returns 0 if the trace oversizes the buffer's free |
78 | * space, 1 otherwise. | |
79 | * | |
f0868d1e SR |
80 | * The tracer may use either sequence operations or its own |
81 | * copy to user routines. To simplify formating of a trace | |
82 | * trace_seq_printf is used to store strings into a special | |
83 | * buffer (@s). Then the output may be either used by | |
84 | * the sequencer or pulled into another buffer. | |
85 | */ | |
86 | int | |
87 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
88 | { | |
89 | int len = (PAGE_SIZE - 1) - s->len; | |
90 | va_list ap; | |
91 | int ret; | |
92 | ||
d184b31c | 93 | if (s->full || !len) |
f0868d1e SR |
94 | return 0; |
95 | ||
96 | va_start(ap, fmt); | |
97 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
98 | va_end(ap); | |
99 | ||
100 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
101 | if (ret >= len) { |
102 | s->full = 1; | |
f0868d1e | 103 | return 0; |
d184b31c | 104 | } |
f0868d1e SR |
105 | |
106 | s->len += ret; | |
107 | ||
3e69533b | 108 | return 1; |
f0868d1e | 109 | } |
17c873ec | 110 | EXPORT_SYMBOL_GPL(trace_seq_printf); |
f0868d1e | 111 | |
725c624a SR |
112 | /** |
113 | * trace_seq_vprintf - sequence printing of trace information | |
114 | * @s: trace sequence descriptor | |
115 | * @fmt: printf format string | |
116 | * | |
117 | * The tracer may use either sequence operations or its own | |
118 | * copy to user routines. To simplify formating of a trace | |
119 | * trace_seq_printf is used to store strings into a special | |
120 | * buffer (@s). Then the output may be either used by | |
121 | * the sequencer or pulled into another buffer. | |
122 | */ | |
123 | int | |
124 | trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) | |
125 | { | |
126 | int len = (PAGE_SIZE - 1) - s->len; | |
127 | int ret; | |
128 | ||
d184b31c | 129 | if (s->full || !len) |
725c624a SR |
130 | return 0; |
131 | ||
132 | ret = vsnprintf(s->buffer + s->len, len, fmt, args); | |
133 | ||
134 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
135 | if (ret >= len) { |
136 | s->full = 1; | |
725c624a | 137 | return 0; |
d184b31c | 138 | } |
725c624a SR |
139 | |
140 | s->len += ret; | |
141 | ||
142 | return len; | |
143 | } | |
144 | EXPORT_SYMBOL_GPL(trace_seq_vprintf); | |
145 | ||
769b0441 | 146 | int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
1427cdf0 LJ |
147 | { |
148 | int len = (PAGE_SIZE - 1) - s->len; | |
149 | int ret; | |
150 | ||
d184b31c | 151 | if (s->full || !len) |
1427cdf0 LJ |
152 | return 0; |
153 | ||
154 | ret = bstr_printf(s->buffer + s->len, len, fmt, binary); | |
155 | ||
156 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
157 | if (ret >= len) { |
158 | s->full = 1; | |
1427cdf0 | 159 | return 0; |
d184b31c | 160 | } |
1427cdf0 LJ |
161 | |
162 | s->len += ret; | |
163 | ||
164 | return len; | |
165 | } | |
166 | ||
f0868d1e SR |
167 | /** |
168 | * trace_seq_puts - trace sequence printing of simple string | |
169 | * @s: trace sequence descriptor | |
170 | * @str: simple string to record | |
171 | * | |
172 | * The tracer may use either the sequence operations or its own | |
173 | * copy to user routines. This function records a simple string | |
174 | * into a special buffer (@s) for later retrieval by a sequencer | |
175 | * or other mechanism. | |
176 | */ | |
177 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
178 | { | |
179 | int len = strlen(str); | |
180 | ||
d184b31c | 181 | if (s->full) |
f0868d1e SR |
182 | return 0; |
183 | ||
d184b31c JB |
184 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
185 | s->full = 1; | |
186 | return 0; | |
187 | } | |
188 | ||
f0868d1e SR |
189 | memcpy(s->buffer + s->len, str, len); |
190 | s->len += len; | |
191 | ||
192 | return len; | |
193 | } | |
194 | ||
195 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
196 | { | |
d184b31c | 197 | if (s->full) |
f0868d1e SR |
198 | return 0; |
199 | ||
d184b31c JB |
200 | if (s->len >= (PAGE_SIZE - 1)) { |
201 | s->full = 1; | |
202 | return 0; | |
203 | } | |
204 | ||
f0868d1e SR |
205 | s->buffer[s->len++] = c; |
206 | ||
207 | return 1; | |
208 | } | |
bf816235 | 209 | EXPORT_SYMBOL(trace_seq_putc); |
f0868d1e | 210 | |
b14b70a6 | 211 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e | 212 | { |
d184b31c | 213 | if (s->full) |
f0868d1e SR |
214 | return 0; |
215 | ||
d184b31c JB |
216 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
217 | s->full = 1; | |
218 | return 0; | |
219 | } | |
220 | ||
f0868d1e SR |
221 | memcpy(s->buffer + s->len, mem, len); |
222 | s->len += len; | |
223 | ||
224 | return len; | |
225 | } | |
226 | ||
b14b70a6 | 227 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
228 | { |
229 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 230 | const unsigned char *data = mem; |
f0868d1e SR |
231 | int i, j; |
232 | ||
d184b31c JB |
233 | if (s->full) |
234 | return 0; | |
235 | ||
f0868d1e SR |
236 | #ifdef __BIG_ENDIAN |
237 | for (i = 0, j = 0; i < len; i++) { | |
238 | #else | |
239 | for (i = len-1, j = 0; i >= 0; i--) { | |
240 | #endif | |
241 | hex[j++] = hex_asc_hi(data[i]); | |
242 | hex[j++] = hex_asc_lo(data[i]); | |
243 | } | |
244 | hex[j++] = ' '; | |
245 | ||
246 | return trace_seq_putmem(s, hex, j); | |
247 | } | |
248 | ||
bdd6df6a EGM |
249 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
250 | { | |
251 | void *ret; | |
252 | ||
d184b31c | 253 | if (s->full) |
668eb65f | 254 | return NULL; |
d184b31c JB |
255 | |
256 | if (len > ((PAGE_SIZE - 1) - s->len)) { | |
257 | s->full = 1; | |
bdd6df6a | 258 | return NULL; |
d184b31c | 259 | } |
bdd6df6a EGM |
260 | |
261 | ret = s->buffer + s->len; | |
262 | s->len += len; | |
263 | ||
264 | return ret; | |
265 | } | |
266 | ||
f0868d1e SR |
267 | int trace_seq_path(struct trace_seq *s, struct path *path) |
268 | { | |
269 | unsigned char *p; | |
270 | ||
d184b31c | 271 | if (s->full) |
f0868d1e | 272 | return 0; |
d184b31c JB |
273 | |
274 | if (s->len >= (PAGE_SIZE - 1)) { | |
275 | s->full = 1; | |
276 | return 0; | |
277 | } | |
278 | ||
f0868d1e SR |
279 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); |
280 | if (!IS_ERR(p)) { | |
281 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
282 | if (p) { | |
283 | s->len = p - s->buffer; | |
284 | return 1; | |
285 | } | |
286 | } else { | |
287 | s->buffer[s->len++] = '?'; | |
288 | return 1; | |
289 | } | |
290 | ||
d184b31c | 291 | s->full = 1; |
f0868d1e SR |
292 | return 0; |
293 | } | |
294 | ||
be74b73a SR |
295 | const char * |
296 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
297 | unsigned long flags, | |
298 | const struct trace_print_flags *flag_array) | |
299 | { | |
300 | unsigned long mask; | |
301 | const char *str; | |
56d8bd3f | 302 | const char *ret = p->buffer + p->len; |
be74b73a SR |
303 | int i; |
304 | ||
be74b73a SR |
305 | for (i = 0; flag_array[i].name && flags; i++) { |
306 | ||
307 | mask = flag_array[i].mask; | |
308 | if ((flags & mask) != mask) | |
309 | continue; | |
310 | ||
311 | str = flag_array[i].name; | |
312 | flags &= ~mask; | |
313 | if (p->len && delim) | |
314 | trace_seq_puts(p, delim); | |
315 | trace_seq_puts(p, str); | |
316 | } | |
317 | ||
318 | /* check for left over flags */ | |
319 | if (flags) { | |
320 | if (p->len && delim) | |
321 | trace_seq_puts(p, delim); | |
322 | trace_seq_printf(p, "0x%lx", flags); | |
323 | } | |
324 | ||
325 | trace_seq_putc(p, 0); | |
326 | ||
56d8bd3f | 327 | return ret; |
be74b73a | 328 | } |
ec081ddc | 329 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 330 | |
0f4fc29d SR |
331 | const char * |
332 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
333 | const struct trace_print_flags *symbol_array) | |
334 | { | |
335 | int i; | |
56d8bd3f | 336 | const char *ret = p->buffer + p->len; |
0f4fc29d SR |
337 | |
338 | for (i = 0; symbol_array[i].name; i++) { | |
339 | ||
340 | if (val != symbol_array[i].mask) | |
341 | continue; | |
342 | ||
343 | trace_seq_puts(p, symbol_array[i].name); | |
344 | break; | |
345 | } | |
346 | ||
347 | if (!p->len) | |
348 | trace_seq_printf(p, "0x%lx", val); | |
349 | ||
350 | trace_seq_putc(p, 0); | |
351 | ||
56d8bd3f | 352 | return ret; |
0f4fc29d | 353 | } |
ec081ddc | 354 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 355 | |
2fc1b6f0 | 356 | #if BITS_PER_LONG == 32 |
357 | const char * | |
358 | ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, | |
359 | const struct trace_print_flags_u64 *symbol_array) | |
360 | { | |
361 | int i; | |
362 | const char *ret = p->buffer + p->len; | |
363 | ||
364 | for (i = 0; symbol_array[i].name; i++) { | |
365 | ||
366 | if (val != symbol_array[i].mask) | |
367 | continue; | |
368 | ||
369 | trace_seq_puts(p, symbol_array[i].name); | |
370 | break; | |
371 | } | |
372 | ||
373 | if (!p->len) | |
374 | trace_seq_printf(p, "0x%llx", val); | |
375 | ||
376 | trace_seq_putc(p, 0); | |
377 | ||
378 | return ret; | |
379 | } | |
380 | EXPORT_SYMBOL(ftrace_print_symbols_seq_u64); | |
381 | #endif | |
382 | ||
5a2e3995 KT |
383 | const char * |
384 | ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) | |
385 | { | |
386 | int i; | |
387 | const char *ret = p->buffer + p->len; | |
388 | ||
389 | for (i = 0; i < buf_len; i++) | |
390 | trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]); | |
391 | ||
392 | trace_seq_putc(p, 0); | |
393 | ||
394 | return ret; | |
395 | } | |
396 | EXPORT_SYMBOL(ftrace_print_hex_seq); | |
397 | ||
f0868d1e SR |
398 | #ifdef CONFIG_KRETPROBES |
399 | static inline const char *kretprobed(const char *name) | |
400 | { | |
401 | static const char tramp_name[] = "kretprobe_trampoline"; | |
402 | int size = sizeof(tramp_name); | |
403 | ||
404 | if (strncmp(tramp_name, name, size) == 0) | |
405 | return "[unknown/kretprobe'd]"; | |
406 | return name; | |
407 | } | |
408 | #else | |
409 | static inline const char *kretprobed(const char *name) | |
410 | { | |
411 | return name; | |
412 | } | |
413 | #endif /* CONFIG_KRETPROBES */ | |
414 | ||
415 | static int | |
416 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
417 | { | |
418 | #ifdef CONFIG_KALLSYMS | |
419 | char str[KSYM_SYMBOL_LEN]; | |
420 | const char *name; | |
421 | ||
422 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
423 | ||
424 | name = kretprobed(str); | |
425 | ||
426 | return trace_seq_printf(s, fmt, name); | |
427 | #endif | |
428 | return 1; | |
429 | } | |
430 | ||
431 | static int | |
432 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
433 | unsigned long address) | |
434 | { | |
435 | #ifdef CONFIG_KALLSYMS | |
436 | char str[KSYM_SYMBOL_LEN]; | |
437 | const char *name; | |
438 | ||
439 | sprint_symbol(str, address); | |
440 | name = kretprobed(str); | |
441 | ||
442 | return trace_seq_printf(s, fmt, name); | |
443 | #endif | |
444 | return 1; | |
445 | } | |
446 | ||
447 | #ifndef CONFIG_64BIT | |
448 | # define IP_FMT "%08lx" | |
449 | #else | |
450 | # define IP_FMT "%016lx" | |
451 | #endif | |
452 | ||
453 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
454 | unsigned long ip, unsigned long sym_flags) | |
455 | { | |
456 | struct file *file = NULL; | |
457 | unsigned long vmstart = 0; | |
458 | int ret = 1; | |
459 | ||
d184b31c JB |
460 | if (s->full) |
461 | return 0; | |
462 | ||
f0868d1e SR |
463 | if (mm) { |
464 | const struct vm_area_struct *vma; | |
465 | ||
466 | down_read(&mm->mmap_sem); | |
467 | vma = find_vma(mm, ip); | |
468 | if (vma) { | |
469 | file = vma->vm_file; | |
470 | vmstart = vma->vm_start; | |
471 | } | |
472 | if (file) { | |
473 | ret = trace_seq_path(s, &file->f_path); | |
474 | if (ret) | |
475 | ret = trace_seq_printf(s, "[+0x%lx]", | |
476 | ip - vmstart); | |
477 | } | |
478 | up_read(&mm->mmap_sem); | |
479 | } | |
480 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
481 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
482 | return ret; | |
483 | } | |
484 | ||
485 | int | |
486 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
487 | unsigned long sym_flags) | |
488 | { | |
489 | struct mm_struct *mm = NULL; | |
490 | int ret = 1; | |
491 | unsigned int i; | |
492 | ||
493 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
494 | struct task_struct *task; | |
495 | /* | |
496 | * we do the lookup on the thread group leader, | |
497 | * since individual threads might have already quit! | |
498 | */ | |
499 | rcu_read_lock(); | |
48659d31 | 500 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
501 | if (task) |
502 | mm = get_task_mm(task); | |
503 | rcu_read_unlock(); | |
504 | } | |
505 | ||
506 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
507 | unsigned long ip = entry->caller[i]; | |
508 | ||
509 | if (ip == ULONG_MAX || !ret) | |
510 | break; | |
048dc50c | 511 | if (ret) |
512 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
513 | if (!ip) { |
514 | if (ret) | |
515 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 516 | if (ret) |
517 | ret = trace_seq_puts(s, "\n"); | |
f0868d1e SR |
518 | continue; |
519 | } | |
520 | if (!ret) | |
521 | break; | |
522 | if (ret) | |
523 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
048dc50c | 524 | ret = trace_seq_puts(s, "\n"); |
f0868d1e SR |
525 | } |
526 | ||
527 | if (mm) | |
528 | mmput(mm); | |
529 | return ret; | |
530 | } | |
531 | ||
532 | int | |
533 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
534 | { | |
535 | int ret; | |
536 | ||
537 | if (!ip) | |
538 | return trace_seq_printf(s, "0"); | |
539 | ||
540 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
541 | ret = seq_print_sym_offset(s, "%s", ip); | |
542 | else | |
543 | ret = seq_print_sym_short(s, "%s", ip); | |
544 | ||
545 | if (!ret) | |
546 | return 0; | |
547 | ||
548 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
549 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
550 | return ret; | |
551 | } | |
552 | ||
f81c972d SR |
553 | /** |
554 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
555 | * @s: trace seq struct to write to | |
556 | * @entry: The trace entry field from the ring buffer | |
557 | * | |
558 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 559 | * count. |
f81c972d SR |
560 | */ |
561 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 562 | { |
10da37a6 DS |
563 | char hardsoft_irq; |
564 | char need_resched; | |
565 | char irqs_off; | |
566 | int hardirq; | |
567 | int softirq; | |
637e7e86 | 568 | int ret; |
c4a8e8be | 569 | |
c4a8e8be FW |
570 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
571 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 572 | |
10da37a6 DS |
573 | irqs_off = |
574 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
575 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
576 | '.'; | |
577 | need_resched = | |
578 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'; | |
579 | hardsoft_irq = | |
580 | (hardirq && softirq) ? 'H' : | |
581 | hardirq ? 'h' : | |
582 | softirq ? 's' : | |
583 | '.'; | |
584 | ||
f81c972d | 585 | if (!trace_seq_printf(s, "%c%c%c", |
10da37a6 | 586 | irqs_off, need_resched, hardsoft_irq)) |
d9793bd8 | 587 | return 0; |
c4a8e8be | 588 | |
829b876d SR |
589 | if (entry->preempt_count) |
590 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 591 | else |
829b876d SR |
592 | ret = trace_seq_putc(s, '.'); |
593 | ||
e6e1e259 | 594 | return ret; |
c4a8e8be FW |
595 | } |
596 | ||
f81c972d SR |
597 | static int |
598 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
599 | { | |
600 | char comm[TASK_COMM_LEN]; | |
601 | ||
602 | trace_find_cmdline(entry->pid, comm); | |
603 | ||
604 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
605 | comm, entry->pid, cpu)) | |
606 | return 0; | |
607 | ||
608 | return trace_print_lat_fmt(s, entry); | |
609 | } | |
610 | ||
c4a8e8be FW |
611 | static unsigned long preempt_mark_thresh = 100; |
612 | ||
d9793bd8 | 613 | static int |
c4a8e8be FW |
614 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
615 | unsigned long rel_usecs) | |
616 | { | |
d9793bd8 ACM |
617 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
618 | rel_usecs > preempt_mark_thresh ? '!' : | |
619 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
620 | } |
621 | ||
622 | int trace_print_context(struct trace_iterator *iter) | |
623 | { | |
624 | struct trace_seq *s = &iter->seq; | |
625 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
626 | unsigned long long t = ns2usecs(iter->ts); |
627 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
628 | unsigned long secs = (unsigned long)t; | |
4ca53085 SR |
629 | char comm[TASK_COMM_LEN]; |
630 | ||
631 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 632 | |
d9793bd8 | 633 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
1830b52d | 634 | comm, entry->pid, iter->cpu, secs, usec_rem); |
c4a8e8be FW |
635 | } |
636 | ||
637 | int trace_print_lat_context(struct trace_iterator *iter) | |
638 | { | |
639 | u64 next_ts; | |
d9793bd8 | 640 | int ret; |
c4a8e8be FW |
641 | struct trace_seq *s = &iter->seq; |
642 | struct trace_entry *entry = iter->ent, | |
643 | *next_entry = trace_find_next_entry(iter, NULL, | |
644 | &next_ts); | |
645 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
646 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
647 | unsigned long rel_usecs; | |
648 | ||
649 | if (!next_entry) | |
650 | next_ts = iter->ts; | |
651 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
652 | ||
653 | if (verbose) { | |
4ca53085 SR |
654 | char comm[TASK_COMM_LEN]; |
655 | ||
656 | trace_find_cmdline(entry->pid, comm); | |
657 | ||
cf8e3474 | 658 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 659 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 660 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
661 | entry->preempt_count, iter->idx, |
662 | ns2usecs(iter->ts), | |
663 | abs_usecs / USEC_PER_MSEC, | |
664 | abs_usecs % USEC_PER_MSEC, | |
665 | rel_usecs / USEC_PER_MSEC, | |
666 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 667 | } else { |
1830b52d | 668 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
669 | if (ret) |
670 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
671 | } |
672 | ||
d9793bd8 | 673 | return ret; |
c4a8e8be FW |
674 | } |
675 | ||
f633cef0 SR |
676 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
677 | ||
678 | static int task_state_char(unsigned long state) | |
679 | { | |
680 | int bit = state ? __ffs(state) + 1 : 0; | |
681 | ||
682 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
683 | } | |
684 | ||
f0868d1e SR |
685 | /** |
686 | * ftrace_find_event - find a registered event | |
687 | * @type: the type of event to look for | |
688 | * | |
689 | * Returns an event of type @type otherwise NULL | |
4f535968 | 690 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
691 | */ |
692 | struct trace_event *ftrace_find_event(int type) | |
693 | { | |
694 | struct trace_event *event; | |
695 | struct hlist_node *n; | |
696 | unsigned key; | |
697 | ||
698 | key = type & (EVENT_HASHSIZE - 1); | |
699 | ||
4f535968 | 700 | hlist_for_each_entry(event, n, &event_hash[key], node) { |
f0868d1e SR |
701 | if (event->type == type) |
702 | return event; | |
703 | } | |
704 | ||
705 | return NULL; | |
706 | } | |
707 | ||
060fa5c8 SR |
708 | static LIST_HEAD(ftrace_event_list); |
709 | ||
710 | static int trace_search_list(struct list_head **list) | |
711 | { | |
712 | struct trace_event *e; | |
713 | int last = __TRACE_LAST_TYPE; | |
714 | ||
715 | if (list_empty(&ftrace_event_list)) { | |
716 | *list = &ftrace_event_list; | |
717 | return last + 1; | |
718 | } | |
719 | ||
720 | /* | |
721 | * We used up all possible max events, | |
722 | * lets see if somebody freed one. | |
723 | */ | |
724 | list_for_each_entry(e, &ftrace_event_list, list) { | |
725 | if (e->type != last + 1) | |
726 | break; | |
727 | last++; | |
728 | } | |
729 | ||
730 | /* Did we used up all 65 thousand events??? */ | |
731 | if ((last + 1) > FTRACE_MAX_EVENT) | |
732 | return 0; | |
733 | ||
734 | *list = &e->list; | |
735 | return last + 1; | |
736 | } | |
737 | ||
4f535968 LJ |
738 | void trace_event_read_lock(void) |
739 | { | |
740 | down_read(&trace_event_mutex); | |
741 | } | |
742 | ||
743 | void trace_event_read_unlock(void) | |
744 | { | |
745 | up_read(&trace_event_mutex); | |
746 | } | |
747 | ||
f0868d1e SR |
748 | /** |
749 | * register_ftrace_event - register output for an event type | |
750 | * @event: the event type to register | |
751 | * | |
752 | * Event types are stored in a hash and this hash is used to | |
753 | * find a way to print an event. If the @event->type is set | |
754 | * then it will use that type, otherwise it will assign a | |
755 | * type to use. | |
756 | * | |
757 | * If you assign your own type, please make sure it is added | |
758 | * to the trace_type enum in trace.h, to avoid collisions | |
759 | * with the dynamic types. | |
760 | * | |
761 | * Returns the event type number or zero on error. | |
762 | */ | |
763 | int register_ftrace_event(struct trace_event *event) | |
764 | { | |
765 | unsigned key; | |
766 | int ret = 0; | |
767 | ||
4f535968 | 768 | down_write(&trace_event_mutex); |
f0868d1e | 769 | |
060fa5c8 | 770 | if (WARN_ON(!event)) |
28bea271 | 771 | goto out; |
28bea271 | 772 | |
a9a57763 SR |
773 | if (WARN_ON(!event->funcs)) |
774 | goto out; | |
775 | ||
060fa5c8 SR |
776 | INIT_LIST_HEAD(&event->list); |
777 | ||
778 | if (!event->type) { | |
48dd0fed | 779 | struct list_head *list = NULL; |
060fa5c8 SR |
780 | |
781 | if (next_event_type > FTRACE_MAX_EVENT) { | |
782 | ||
783 | event->type = trace_search_list(&list); | |
784 | if (!event->type) | |
785 | goto out; | |
786 | ||
787 | } else { | |
788 | ||
789 | event->type = next_event_type++; | |
790 | list = &ftrace_event_list; | |
791 | } | |
792 | ||
793 | if (WARN_ON(ftrace_find_event(event->type))) | |
794 | goto out; | |
795 | ||
796 | list_add_tail(&event->list, list); | |
797 | ||
798 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
799 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
800 | WARN_ON(1); | |
f0868d1e | 801 | goto out; |
060fa5c8 SR |
802 | } else { |
803 | /* Is this event already used */ | |
804 | if (ftrace_find_event(event->type)) | |
805 | goto out; | |
806 | } | |
f0868d1e | 807 | |
a9a57763 SR |
808 | if (event->funcs->trace == NULL) |
809 | event->funcs->trace = trace_nop_print; | |
810 | if (event->funcs->raw == NULL) | |
811 | event->funcs->raw = trace_nop_print; | |
812 | if (event->funcs->hex == NULL) | |
813 | event->funcs->hex = trace_nop_print; | |
814 | if (event->funcs->binary == NULL) | |
815 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 816 | |
f0868d1e SR |
817 | key = event->type & (EVENT_HASHSIZE - 1); |
818 | ||
4f535968 | 819 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
820 | |
821 | ret = event->type; | |
822 | out: | |
4f535968 | 823 | up_write(&trace_event_mutex); |
f0868d1e SR |
824 | |
825 | return ret; | |
826 | } | |
17c873ec | 827 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 828 | |
110bf2b7 SR |
829 | /* |
830 | * Used by module code with the trace_event_mutex held for write. | |
831 | */ | |
832 | int __unregister_ftrace_event(struct trace_event *event) | |
833 | { | |
834 | hlist_del(&event->node); | |
835 | list_del(&event->list); | |
836 | return 0; | |
837 | } | |
838 | ||
f0868d1e SR |
839 | /** |
840 | * unregister_ftrace_event - remove a no longer used event | |
841 | * @event: the event to remove | |
842 | */ | |
843 | int unregister_ftrace_event(struct trace_event *event) | |
844 | { | |
4f535968 | 845 | down_write(&trace_event_mutex); |
110bf2b7 | 846 | __unregister_ftrace_event(event); |
4f535968 | 847 | up_write(&trace_event_mutex); |
f0868d1e SR |
848 | |
849 | return 0; | |
850 | } | |
17c873ec | 851 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
852 | |
853 | /* | |
854 | * Standard events | |
855 | */ | |
856 | ||
a9a57763 SR |
857 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
858 | struct trace_event *event) | |
f633cef0 | 859 | { |
ee5e51f5 JO |
860 | if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type)) |
861 | return TRACE_TYPE_PARTIAL_LINE; | |
862 | ||
d9793bd8 | 863 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
864 | } |
865 | ||
866 | /* TRACE_FN */ | |
a9a57763 SR |
867 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
868 | struct trace_event *event) | |
f633cef0 SR |
869 | { |
870 | struct ftrace_entry *field; | |
2c9b238e | 871 | struct trace_seq *s = &iter->seq; |
f633cef0 | 872 | |
2c9b238e | 873 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
874 | |
875 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
876 | goto partial; | |
877 | ||
878 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
879 | if (!trace_seq_printf(s, " <-")) | |
880 | goto partial; | |
881 | if (!seq_print_ip_sym(s, | |
882 | field->parent_ip, | |
883 | flags)) | |
884 | goto partial; | |
885 | } | |
886 | if (!trace_seq_printf(s, "\n")) | |
887 | goto partial; | |
888 | ||
d9793bd8 | 889 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
890 | |
891 | partial: | |
892 | return TRACE_TYPE_PARTIAL_LINE; | |
893 | } | |
894 | ||
a9a57763 SR |
895 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
896 | struct trace_event *event) | |
f633cef0 SR |
897 | { |
898 | struct ftrace_entry *field; | |
899 | ||
2c9b238e | 900 | trace_assign_type(field, iter->ent); |
f633cef0 | 901 | |
2c9b238e | 902 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
903 | field->ip, |
904 | field->parent_ip)) | |
f633cef0 SR |
905 | return TRACE_TYPE_PARTIAL_LINE; |
906 | ||
d9793bd8 | 907 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
908 | } |
909 | ||
a9a57763 SR |
910 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
911 | struct trace_event *event) | |
f633cef0 SR |
912 | { |
913 | struct ftrace_entry *field; | |
2c9b238e | 914 | struct trace_seq *s = &iter->seq; |
f633cef0 | 915 | |
2c9b238e | 916 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
917 | |
918 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
919 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
920 | ||
d9793bd8 | 921 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
922 | } |
923 | ||
a9a57763 SR |
924 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
925 | struct trace_event *event) | |
f633cef0 SR |
926 | { |
927 | struct ftrace_entry *field; | |
2c9b238e | 928 | struct trace_seq *s = &iter->seq; |
f633cef0 | 929 | |
2c9b238e | 930 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
931 | |
932 | SEQ_PUT_FIELD_RET(s, field->ip); | |
933 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
934 | ||
d9793bd8 | 935 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
936 | } |
937 | ||
a9a57763 | 938 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 939 | .trace = trace_fn_trace, |
f633cef0 SR |
940 | .raw = trace_fn_raw, |
941 | .hex = trace_fn_hex, | |
942 | .binary = trace_fn_bin, | |
943 | }; | |
944 | ||
a9a57763 SR |
945 | static struct trace_event trace_fn_event = { |
946 | .type = TRACE_FN, | |
947 | .funcs = &trace_fn_funcs, | |
948 | }; | |
949 | ||
f633cef0 | 950 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
951 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
952 | char *delim) | |
f633cef0 SR |
953 | { |
954 | struct ctx_switch_entry *field; | |
4ca53085 | 955 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
956 | int S, T; |
957 | ||
4ca53085 | 958 | |
2c9b238e | 959 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
960 | |
961 | T = task_state_char(field->next_state); | |
962 | S = task_state_char(field->prev_state); | |
4ca53085 | 963 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
964 | if (!trace_seq_printf(&iter->seq, |
965 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
966 | field->prev_pid, |
967 | field->prev_prio, | |
968 | S, delim, | |
969 | field->next_cpu, | |
970 | field->next_pid, | |
971 | field->next_prio, | |
972 | T, comm)) | |
f633cef0 SR |
973 | return TRACE_TYPE_PARTIAL_LINE; |
974 | ||
d9793bd8 | 975 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
976 | } |
977 | ||
a9a57763 SR |
978 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
979 | struct trace_event *event) | |
f633cef0 | 980 | { |
2c9b238e | 981 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
982 | } |
983 | ||
ae7462b4 | 984 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 985 | int flags, struct trace_event *event) |
f633cef0 | 986 | { |
2c9b238e | 987 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
988 | } |
989 | ||
2c9b238e | 990 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
991 | { |
992 | struct ctx_switch_entry *field; | |
993 | int T; | |
994 | ||
2c9b238e | 995 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
996 | |
997 | if (!S) | |
b0f56f1a | 998 | S = task_state_char(field->prev_state); |
f633cef0 | 999 | T = task_state_char(field->next_state); |
2c9b238e | 1000 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
1001 | field->prev_pid, |
1002 | field->prev_prio, | |
1003 | S, | |
1004 | field->next_cpu, | |
1005 | field->next_pid, | |
1006 | field->next_prio, | |
1007 | T)) | |
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_ctx_raw(struct trace_iterator *iter, int flags, |
1014 | struct trace_event *event) | |
f633cef0 | 1015 | { |
2c9b238e | 1016 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
1017 | } |
1018 | ||
a9a57763 SR |
1019 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
1020 | struct trace_event *event) | |
f633cef0 | 1021 | { |
2c9b238e | 1022 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
1023 | } |
1024 | ||
1025 | ||
2c9b238e | 1026 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
1027 | { |
1028 | struct ctx_switch_entry *field; | |
2c9b238e | 1029 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1030 | int T; |
1031 | ||
2c9b238e | 1032 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1033 | |
1034 | if (!S) | |
b0f56f1a | 1035 | S = task_state_char(field->prev_state); |
f633cef0 SR |
1036 | T = task_state_char(field->next_state); |
1037 | ||
1038 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
1039 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
1040 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
1041 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
1042 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
1043 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
1044 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
1045 | ||
d9793bd8 | 1046 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1047 | } |
1048 | ||
a9a57763 SR |
1049 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1050 | struct trace_event *event) | |
f633cef0 | 1051 | { |
2c9b238e | 1052 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1053 | } |
1054 | ||
a9a57763 SR |
1055 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1056 | struct trace_event *event) | |
f633cef0 | 1057 | { |
2c9b238e | 1058 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1059 | } |
1060 | ||
ae7462b4 | 1061 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1062 | int flags, struct trace_event *event) |
f633cef0 SR |
1063 | { |
1064 | struct ctx_switch_entry *field; | |
2c9b238e | 1065 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1066 | |
2c9b238e | 1067 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1068 | |
1069 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
1070 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
1071 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
1072 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
1073 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
1074 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
1075 | ||
d9793bd8 | 1076 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1077 | } |
1078 | ||
a9a57763 | 1079 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1080 | .trace = trace_ctx_print, |
f633cef0 SR |
1081 | .raw = trace_ctx_raw, |
1082 | .hex = trace_ctx_hex, | |
1083 | .binary = trace_ctxwake_bin, | |
1084 | }; | |
1085 | ||
a9a57763 SR |
1086 | static struct trace_event trace_ctx_event = { |
1087 | .type = TRACE_CTX, | |
1088 | .funcs = &trace_ctx_funcs, | |
1089 | }; | |
1090 | ||
1091 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1092 | .trace = trace_wake_print, |
f633cef0 SR |
1093 | .raw = trace_wake_raw, |
1094 | .hex = trace_wake_hex, | |
1095 | .binary = trace_ctxwake_bin, | |
1096 | }; | |
1097 | ||
a9a57763 SR |
1098 | static struct trace_event trace_wake_event = { |
1099 | .type = TRACE_WAKE, | |
1100 | .funcs = &trace_wake_funcs, | |
1101 | }; | |
1102 | ||
f633cef0 SR |
1103 | /* TRACE_STACK */ |
1104 | ||
ae7462b4 | 1105 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1106 | int flags, struct trace_event *event) |
f633cef0 SR |
1107 | { |
1108 | struct stack_entry *field; | |
2c9b238e | 1109 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1110 | int i; |
1111 | ||
2c9b238e | 1112 | trace_assign_type(field, iter->ent); |
f633cef0 | 1113 | |
563af16c | 1114 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1115 | goto partial; |
f633cef0 | 1116 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { |
f11b3f4e | 1117 | if (!field->caller[i] || (field->caller[i] == ULONG_MAX)) |
1ec7c484 | 1118 | break; |
f11b3f4e | 1119 | if (!trace_seq_puts(s, " => ")) |
1120 | goto partial; | |
f633cef0 | 1121 | |
f11b3f4e | 1122 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
1123 | goto partial; | |
6c1a99af | 1124 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
1125 | goto partial; |
1126 | } | |
1127 | ||
d9793bd8 | 1128 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1129 | |
1130 | partial: | |
1131 | return TRACE_TYPE_PARTIAL_LINE; | |
1132 | } | |
1133 | ||
a9a57763 | 1134 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1135 | .trace = trace_stack_print, |
f633cef0 SR |
1136 | }; |
1137 | ||
a9a57763 SR |
1138 | static struct trace_event trace_stack_event = { |
1139 | .type = TRACE_STACK, | |
1140 | .funcs = &trace_stack_funcs, | |
1141 | }; | |
1142 | ||
f633cef0 | 1143 | /* TRACE_USER_STACK */ |
ae7462b4 | 1144 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1145 | int flags, struct trace_event *event) |
f633cef0 SR |
1146 | { |
1147 | struct userstack_entry *field; | |
2c9b238e | 1148 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1149 | |
2c9b238e | 1150 | trace_assign_type(field, iter->ent); |
f633cef0 | 1151 | |
563af16c | 1152 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1153 | goto partial; |
1154 | ||
048dc50c | 1155 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1156 | goto partial; |
1157 | ||
d9793bd8 | 1158 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1159 | |
1160 | partial: | |
1161 | return TRACE_TYPE_PARTIAL_LINE; | |
1162 | } | |
1163 | ||
a9a57763 | 1164 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1165 | .trace = trace_user_stack_print, |
f633cef0 SR |
1166 | }; |
1167 | ||
a9a57763 SR |
1168 | static struct trace_event trace_user_stack_event = { |
1169 | .type = TRACE_USER_STACK, | |
1170 | .funcs = &trace_user_stack_funcs, | |
1171 | }; | |
1172 | ||
48ead020 | 1173 | /* TRACE_BPRINT */ |
1427cdf0 | 1174 | static enum print_line_t |
a9a57763 SR |
1175 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1176 | struct trace_event *event) | |
1427cdf0 LJ |
1177 | { |
1178 | struct trace_entry *entry = iter->ent; | |
1179 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1180 | struct bprint_entry *field; |
1427cdf0 LJ |
1181 | |
1182 | trace_assign_type(field, entry); | |
1183 | ||
1184 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1185 | goto partial; | |
1186 | ||
1187 | if (!trace_seq_puts(s, ": ")) | |
1188 | goto partial; | |
1189 | ||
1190 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1191 | goto partial; | |
1192 | ||
1193 | return TRACE_TYPE_HANDLED; | |
1194 | ||
1195 | partial: | |
1196 | return TRACE_TYPE_PARTIAL_LINE; | |
1197 | } | |
1198 | ||
769b0441 | 1199 | |
48ead020 | 1200 | static enum print_line_t |
a9a57763 SR |
1201 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1202 | struct trace_event *event) | |
1427cdf0 | 1203 | { |
48ead020 | 1204 | struct bprint_entry *field; |
1427cdf0 | 1205 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1206 | |
769b0441 | 1207 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1208 | |
1209 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1210 | goto partial; | |
1211 | ||
1212 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1213 | goto partial; | |
1214 | ||
1215 | return TRACE_TYPE_HANDLED; | |
1216 | ||
1217 | partial: | |
1218 | return TRACE_TYPE_PARTIAL_LINE; | |
1219 | } | |
1220 | ||
a9a57763 SR |
1221 | static struct trace_event_functions trace_bprint_funcs = { |
1222 | .trace = trace_bprint_print, | |
1223 | .raw = trace_bprint_raw, | |
1224 | }; | |
769b0441 | 1225 | |
48ead020 FW |
1226 | static struct trace_event trace_bprint_event = { |
1227 | .type = TRACE_BPRINT, | |
a9a57763 | 1228 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1229 | }; |
1230 | ||
1231 | /* TRACE_PRINT */ | |
1232 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1233 | int flags, struct trace_event *event) |
48ead020 FW |
1234 | { |
1235 | struct print_entry *field; | |
1236 | struct trace_seq *s = &iter->seq; | |
1237 | ||
1238 | trace_assign_type(field, iter->ent); | |
1239 | ||
1240 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1241 | goto partial; | |
1242 | ||
1243 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1244 | goto partial; | |
1245 | ||
1246 | return TRACE_TYPE_HANDLED; | |
1247 | ||
1248 | partial: | |
1249 | return TRACE_TYPE_PARTIAL_LINE; | |
1250 | } | |
1251 | ||
a9a57763 SR |
1252 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1253 | struct trace_event *event) | |
48ead020 FW |
1254 | { |
1255 | struct print_entry *field; | |
1256 | ||
1257 | trace_assign_type(field, iter->ent); | |
1258 | ||
1259 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1260 | goto partial; | |
1261 | ||
1262 | return TRACE_TYPE_HANDLED; | |
1263 | ||
1264 | partial: | |
1265 | return TRACE_TYPE_PARTIAL_LINE; | |
1266 | } | |
1267 | ||
a9a57763 | 1268 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1269 | .trace = trace_print_print, |
1270 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1271 | }; |
1272 | ||
a9a57763 SR |
1273 | static struct trace_event trace_print_event = { |
1274 | .type = TRACE_PRINT, | |
1275 | .funcs = &trace_print_funcs, | |
1276 | }; | |
1277 | ||
48ead020 | 1278 | |
f633cef0 SR |
1279 | static struct trace_event *events[] __initdata = { |
1280 | &trace_fn_event, | |
1281 | &trace_ctx_event, | |
1282 | &trace_wake_event, | |
f633cef0 SR |
1283 | &trace_stack_event, |
1284 | &trace_user_stack_event, | |
48ead020 | 1285 | &trace_bprint_event, |
f633cef0 SR |
1286 | &trace_print_event, |
1287 | NULL | |
1288 | }; | |
1289 | ||
1290 | __init static int init_events(void) | |
1291 | { | |
1292 | struct trace_event *event; | |
1293 | int i, ret; | |
1294 | ||
1295 | for (i = 0; events[i]; i++) { | |
1296 | event = events[i]; | |
1297 | ||
1298 | ret = register_ftrace_event(event); | |
1299 | if (!ret) { | |
1300 | printk(KERN_WARNING "event %d failed to register\n", | |
1301 | event->type); | |
1302 | WARN_ON_ONCE(1); | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | return 0; | |
1307 | } | |
1308 | device_initcall(init_events); |