Commit | Line | Data |
---|---|---|
f0868d1e SR |
1 | /* |
2 | * trace_output.c | |
3 | * | |
4 | * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/mutex.h> | |
10 | #include <linux/ftrace.h> | |
11 | ||
12 | #include "trace_output.h" | |
13 | ||
14 | /* must be a power of 2 */ | |
15 | #define EVENT_HASHSIZE 128 | |
16 | ||
110bf2b7 | 17 | DECLARE_RWSEM(trace_event_mutex); |
be74b73a | 18 | |
f0868d1e SR |
19 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; |
20 | ||
21 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
22 | ||
a63ce5b3 | 23 | int trace_print_seq(struct seq_file *m, struct trace_seq *s) |
0706f1c4 SR |
24 | { |
25 | int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len; | |
a63ce5b3 SR |
26 | int ret; |
27 | ||
28 | ret = seq_write(m, s->buffer, len); | |
0706f1c4 | 29 | |
a63ce5b3 SR |
30 | /* |
31 | * Only reset this buffer if we successfully wrote to the | |
32 | * seq_file buffer. | |
33 | */ | |
34 | if (!ret) | |
35 | trace_seq_init(s); | |
0706f1c4 | 36 | |
a63ce5b3 | 37 | return ret; |
0706f1c4 SR |
38 | } |
39 | ||
5ef841f6 SR |
40 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
41 | { | |
42 | struct trace_seq *s = &iter->seq; | |
43 | struct trace_entry *entry = iter->ent; | |
44 | struct bprint_entry *field; | |
45 | int ret; | |
46 | ||
47 | trace_assign_type(field, entry); | |
48 | ||
49 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
50 | if (!ret) | |
51 | return TRACE_TYPE_PARTIAL_LINE; | |
52 | ||
53 | return TRACE_TYPE_HANDLED; | |
54 | } | |
55 | ||
56 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
57 | { | |
58 | struct trace_seq *s = &iter->seq; | |
59 | struct trace_entry *entry = iter->ent; | |
60 | struct print_entry *field; | |
61 | int ret; | |
62 | ||
63 | trace_assign_type(field, entry); | |
64 | ||
65 | ret = trace_seq_printf(s, "%s", field->buf); | |
66 | if (!ret) | |
67 | return TRACE_TYPE_PARTIAL_LINE; | |
68 | ||
69 | return TRACE_TYPE_HANDLED; | |
70 | } | |
71 | ||
f0868d1e SR |
72 | /** |
73 | * trace_seq_printf - sequence printing of trace information | |
74 | * @s: trace sequence descriptor | |
75 | * @fmt: printf format string | |
76 | * | |
3e69533b JO |
77 | * It returns 0 if the trace oversizes the buffer's free |
78 | * space, 1 otherwise. | |
79 | * | |
f0868d1e SR |
80 | * The tracer may use either sequence operations or its own |
81 | * copy to user routines. To simplify formating of a trace | |
82 | * trace_seq_printf is used to store strings into a special | |
83 | * buffer (@s). Then the output may be either used by | |
84 | * the sequencer or pulled into another buffer. | |
85 | */ | |
86 | int | |
87 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
88 | { | |
89 | int len = (PAGE_SIZE - 1) - s->len; | |
90 | va_list ap; | |
91 | int ret; | |
92 | ||
d184b31c | 93 | if (s->full || !len) |
f0868d1e SR |
94 | return 0; |
95 | ||
96 | va_start(ap, fmt); | |
97 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
98 | va_end(ap); | |
99 | ||
100 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
101 | if (ret >= len) { |
102 | s->full = 1; | |
f0868d1e | 103 | return 0; |
d184b31c | 104 | } |
f0868d1e SR |
105 | |
106 | s->len += ret; | |
107 | ||
3e69533b | 108 | return 1; |
f0868d1e | 109 | } |
17c873ec | 110 | EXPORT_SYMBOL_GPL(trace_seq_printf); |
f0868d1e | 111 | |
725c624a SR |
112 | /** |
113 | * trace_seq_vprintf - sequence printing of trace information | |
114 | * @s: trace sequence descriptor | |
115 | * @fmt: printf format string | |
116 | * | |
117 | * The tracer may use either sequence operations or its own | |
118 | * copy to user routines. To simplify formating of a trace | |
119 | * trace_seq_printf is used to store strings into a special | |
120 | * buffer (@s). Then the output may be either used by | |
121 | * the sequencer or pulled into another buffer. | |
122 | */ | |
123 | int | |
124 | trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) | |
125 | { | |
126 | int len = (PAGE_SIZE - 1) - s->len; | |
127 | int ret; | |
128 | ||
d184b31c | 129 | if (s->full || !len) |
725c624a SR |
130 | return 0; |
131 | ||
132 | ret = vsnprintf(s->buffer + s->len, len, fmt, args); | |
133 | ||
134 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
135 | if (ret >= len) { |
136 | s->full = 1; | |
725c624a | 137 | return 0; |
d184b31c | 138 | } |
725c624a SR |
139 | |
140 | s->len += ret; | |
141 | ||
142 | return len; | |
143 | } | |
144 | EXPORT_SYMBOL_GPL(trace_seq_vprintf); | |
145 | ||
769b0441 | 146 | int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
1427cdf0 LJ |
147 | { |
148 | int len = (PAGE_SIZE - 1) - s->len; | |
149 | int ret; | |
150 | ||
d184b31c | 151 | if (s->full || !len) |
1427cdf0 LJ |
152 | return 0; |
153 | ||
154 | ret = bstr_printf(s->buffer + s->len, len, fmt, binary); | |
155 | ||
156 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
157 | if (ret >= len) { |
158 | s->full = 1; | |
1427cdf0 | 159 | return 0; |
d184b31c | 160 | } |
1427cdf0 LJ |
161 | |
162 | s->len += ret; | |
163 | ||
164 | return len; | |
165 | } | |
166 | ||
f0868d1e SR |
167 | /** |
168 | * trace_seq_puts - trace sequence printing of simple string | |
169 | * @s: trace sequence descriptor | |
170 | * @str: simple string to record | |
171 | * | |
172 | * The tracer may use either the sequence operations or its own | |
173 | * copy to user routines. This function records a simple string | |
174 | * into a special buffer (@s) for later retrieval by a sequencer | |
175 | * or other mechanism. | |
176 | */ | |
177 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
178 | { | |
179 | int len = strlen(str); | |
180 | ||
d184b31c | 181 | if (s->full) |
f0868d1e SR |
182 | return 0; |
183 | ||
d184b31c JB |
184 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
185 | s->full = 1; | |
186 | return 0; | |
187 | } | |
188 | ||
f0868d1e SR |
189 | memcpy(s->buffer + s->len, str, len); |
190 | s->len += len; | |
191 | ||
192 | return len; | |
193 | } | |
194 | ||
195 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
196 | { | |
d184b31c | 197 | if (s->full) |
f0868d1e SR |
198 | return 0; |
199 | ||
d184b31c JB |
200 | if (s->len >= (PAGE_SIZE - 1)) { |
201 | s->full = 1; | |
202 | return 0; | |
203 | } | |
204 | ||
f0868d1e SR |
205 | s->buffer[s->len++] = c; |
206 | ||
207 | return 1; | |
208 | } | |
bf816235 | 209 | EXPORT_SYMBOL(trace_seq_putc); |
f0868d1e | 210 | |
b14b70a6 | 211 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e | 212 | { |
d184b31c | 213 | if (s->full) |
f0868d1e SR |
214 | return 0; |
215 | ||
d184b31c JB |
216 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
217 | s->full = 1; | |
218 | return 0; | |
219 | } | |
220 | ||
f0868d1e SR |
221 | memcpy(s->buffer + s->len, mem, len); |
222 | s->len += len; | |
223 | ||
224 | return len; | |
225 | } | |
226 | ||
b14b70a6 | 227 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
228 | { |
229 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 230 | const unsigned char *data = mem; |
f0868d1e SR |
231 | int i, j; |
232 | ||
d184b31c JB |
233 | if (s->full) |
234 | return 0; | |
235 | ||
f0868d1e SR |
236 | #ifdef __BIG_ENDIAN |
237 | for (i = 0, j = 0; i < len; i++) { | |
238 | #else | |
239 | for (i = len-1, j = 0; i >= 0; i--) { | |
240 | #endif | |
241 | hex[j++] = hex_asc_hi(data[i]); | |
242 | hex[j++] = hex_asc_lo(data[i]); | |
243 | } | |
244 | hex[j++] = ' '; | |
245 | ||
246 | return trace_seq_putmem(s, hex, j); | |
247 | } | |
248 | ||
bdd6df6a EGM |
249 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
250 | { | |
251 | void *ret; | |
252 | ||
d184b31c | 253 | if (s->full) |
668eb65f | 254 | return NULL; |
d184b31c JB |
255 | |
256 | if (len > ((PAGE_SIZE - 1) - s->len)) { | |
257 | s->full = 1; | |
bdd6df6a | 258 | return NULL; |
d184b31c | 259 | } |
bdd6df6a EGM |
260 | |
261 | ret = s->buffer + s->len; | |
262 | s->len += len; | |
263 | ||
264 | return ret; | |
265 | } | |
266 | ||
38eff289 | 267 | int trace_seq_path(struct trace_seq *s, const struct path *path) |
f0868d1e SR |
268 | { |
269 | unsigned char *p; | |
270 | ||
d184b31c | 271 | if (s->full) |
f0868d1e | 272 | return 0; |
d184b31c JB |
273 | |
274 | if (s->len >= (PAGE_SIZE - 1)) { | |
275 | s->full = 1; | |
276 | return 0; | |
277 | } | |
278 | ||
f0868d1e SR |
279 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); |
280 | if (!IS_ERR(p)) { | |
281 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
282 | if (p) { | |
283 | s->len = p - s->buffer; | |
284 | return 1; | |
285 | } | |
286 | } else { | |
287 | s->buffer[s->len++] = '?'; | |
288 | return 1; | |
289 | } | |
290 | ||
d184b31c | 291 | s->full = 1; |
f0868d1e SR |
292 | return 0; |
293 | } | |
294 | ||
be74b73a SR |
295 | const char * |
296 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
297 | unsigned long flags, | |
298 | const struct trace_print_flags *flag_array) | |
299 | { | |
300 | unsigned long mask; | |
301 | const char *str; | |
56d8bd3f | 302 | const char *ret = p->buffer + p->len; |
e404b321 | 303 | int i, first = 1; |
be74b73a | 304 | |
be74b73a SR |
305 | for (i = 0; flag_array[i].name && flags; i++) { |
306 | ||
307 | mask = flag_array[i].mask; | |
308 | if ((flags & mask) != mask) | |
309 | continue; | |
310 | ||
311 | str = flag_array[i].name; | |
312 | flags &= ~mask; | |
e404b321 | 313 | if (!first && delim) |
be74b73a | 314 | trace_seq_puts(p, delim); |
e404b321 AV |
315 | else |
316 | first = 0; | |
be74b73a SR |
317 | trace_seq_puts(p, str); |
318 | } | |
319 | ||
320 | /* check for left over flags */ | |
321 | if (flags) { | |
5b349261 | 322 | if (!first && delim) |
be74b73a SR |
323 | trace_seq_puts(p, delim); |
324 | trace_seq_printf(p, "0x%lx", flags); | |
325 | } | |
326 | ||
327 | trace_seq_putc(p, 0); | |
328 | ||
56d8bd3f | 329 | return ret; |
be74b73a | 330 | } |
ec081ddc | 331 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 332 | |
0f4fc29d SR |
333 | const char * |
334 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
335 | const struct trace_print_flags *symbol_array) | |
336 | { | |
337 | int i; | |
56d8bd3f | 338 | const char *ret = p->buffer + p->len; |
0f4fc29d SR |
339 | |
340 | for (i = 0; symbol_array[i].name; i++) { | |
341 | ||
342 | if (val != symbol_array[i].mask) | |
343 | continue; | |
344 | ||
345 | trace_seq_puts(p, symbol_array[i].name); | |
346 | break; | |
347 | } | |
348 | ||
5b349261 | 349 | if (ret == (const char *)(p->buffer + p->len)) |
0f4fc29d SR |
350 | trace_seq_printf(p, "0x%lx", val); |
351 | ||
352 | trace_seq_putc(p, 0); | |
353 | ||
56d8bd3f | 354 | return ret; |
0f4fc29d | 355 | } |
ec081ddc | 356 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 357 | |
2fc1b6f0 | 358 | #if BITS_PER_LONG == 32 |
359 | const char * | |
360 | ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, | |
361 | const struct trace_print_flags_u64 *symbol_array) | |
362 | { | |
363 | int i; | |
364 | const char *ret = p->buffer + p->len; | |
365 | ||
366 | for (i = 0; symbol_array[i].name; i++) { | |
367 | ||
368 | if (val != symbol_array[i].mask) | |
369 | continue; | |
370 | ||
371 | trace_seq_puts(p, symbol_array[i].name); | |
372 | break; | |
373 | } | |
374 | ||
5b349261 | 375 | if (ret == (const char *)(p->buffer + p->len)) |
2fc1b6f0 | 376 | trace_seq_printf(p, "0x%llx", val); |
377 | ||
378 | trace_seq_putc(p, 0); | |
379 | ||
380 | return ret; | |
381 | } | |
382 | EXPORT_SYMBOL(ftrace_print_symbols_seq_u64); | |
383 | #endif | |
384 | ||
5a2e3995 KT |
385 | const char * |
386 | ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) | |
387 | { | |
388 | int i; | |
389 | const char *ret = p->buffer + p->len; | |
390 | ||
391 | for (i = 0; i < buf_len; i++) | |
392 | trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]); | |
393 | ||
394 | trace_seq_putc(p, 0); | |
395 | ||
396 | return ret; | |
397 | } | |
398 | EXPORT_SYMBOL(ftrace_print_hex_seq); | |
399 | ||
f0868d1e SR |
400 | #ifdef CONFIG_KRETPROBES |
401 | static inline const char *kretprobed(const char *name) | |
402 | { | |
403 | static const char tramp_name[] = "kretprobe_trampoline"; | |
404 | int size = sizeof(tramp_name); | |
405 | ||
406 | if (strncmp(tramp_name, name, size) == 0) | |
407 | return "[unknown/kretprobe'd]"; | |
408 | return name; | |
409 | } | |
410 | #else | |
411 | static inline const char *kretprobed(const char *name) | |
412 | { | |
413 | return name; | |
414 | } | |
415 | #endif /* CONFIG_KRETPROBES */ | |
416 | ||
417 | static int | |
418 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
419 | { | |
420 | #ifdef CONFIG_KALLSYMS | |
421 | char str[KSYM_SYMBOL_LEN]; | |
422 | const char *name; | |
423 | ||
424 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
425 | ||
426 | name = kretprobed(str); | |
427 | ||
428 | return trace_seq_printf(s, fmt, name); | |
429 | #endif | |
430 | return 1; | |
431 | } | |
432 | ||
433 | static int | |
434 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
435 | unsigned long address) | |
436 | { | |
437 | #ifdef CONFIG_KALLSYMS | |
438 | char str[KSYM_SYMBOL_LEN]; | |
439 | const char *name; | |
440 | ||
441 | sprint_symbol(str, address); | |
442 | name = kretprobed(str); | |
443 | ||
444 | return trace_seq_printf(s, fmt, name); | |
445 | #endif | |
446 | return 1; | |
447 | } | |
448 | ||
449 | #ifndef CONFIG_64BIT | |
450 | # define IP_FMT "%08lx" | |
451 | #else | |
452 | # define IP_FMT "%016lx" | |
453 | #endif | |
454 | ||
455 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
456 | unsigned long ip, unsigned long sym_flags) | |
457 | { | |
458 | struct file *file = NULL; | |
459 | unsigned long vmstart = 0; | |
460 | int ret = 1; | |
461 | ||
d184b31c JB |
462 | if (s->full) |
463 | return 0; | |
464 | ||
f0868d1e SR |
465 | if (mm) { |
466 | const struct vm_area_struct *vma; | |
467 | ||
468 | down_read(&mm->mmap_sem); | |
469 | vma = find_vma(mm, ip); | |
470 | if (vma) { | |
471 | file = vma->vm_file; | |
472 | vmstart = vma->vm_start; | |
473 | } | |
474 | if (file) { | |
475 | ret = trace_seq_path(s, &file->f_path); | |
476 | if (ret) | |
477 | ret = trace_seq_printf(s, "[+0x%lx]", | |
478 | ip - vmstart); | |
479 | } | |
480 | up_read(&mm->mmap_sem); | |
481 | } | |
482 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
483 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
484 | return ret; | |
485 | } | |
486 | ||
487 | int | |
488 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
489 | unsigned long sym_flags) | |
490 | { | |
491 | struct mm_struct *mm = NULL; | |
492 | int ret = 1; | |
493 | unsigned int i; | |
494 | ||
495 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
496 | struct task_struct *task; | |
497 | /* | |
498 | * we do the lookup on the thread group leader, | |
499 | * since individual threads might have already quit! | |
500 | */ | |
501 | rcu_read_lock(); | |
48659d31 | 502 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
503 | if (task) |
504 | mm = get_task_mm(task); | |
505 | rcu_read_unlock(); | |
506 | } | |
507 | ||
508 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
509 | unsigned long ip = entry->caller[i]; | |
510 | ||
511 | if (ip == ULONG_MAX || !ret) | |
512 | break; | |
048dc50c | 513 | if (ret) |
514 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
515 | if (!ip) { |
516 | if (ret) | |
517 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 518 | if (ret) |
519 | ret = trace_seq_puts(s, "\n"); | |
f0868d1e SR |
520 | continue; |
521 | } | |
522 | if (!ret) | |
523 | break; | |
524 | if (ret) | |
525 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
048dc50c | 526 | ret = trace_seq_puts(s, "\n"); |
f0868d1e SR |
527 | } |
528 | ||
529 | if (mm) | |
530 | mmput(mm); | |
531 | return ret; | |
532 | } | |
533 | ||
534 | int | |
535 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
536 | { | |
537 | int ret; | |
538 | ||
539 | if (!ip) | |
540 | return trace_seq_printf(s, "0"); | |
541 | ||
542 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
543 | ret = seq_print_sym_offset(s, "%s", ip); | |
544 | else | |
545 | ret = seq_print_sym_short(s, "%s", ip); | |
546 | ||
547 | if (!ret) | |
548 | return 0; | |
549 | ||
550 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
551 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
552 | return ret; | |
553 | } | |
554 | ||
f81c972d SR |
555 | /** |
556 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
557 | * @s: trace seq struct to write to | |
558 | * @entry: The trace entry field from the ring buffer | |
559 | * | |
560 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 561 | * count. |
f81c972d SR |
562 | */ |
563 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 564 | { |
10da37a6 DS |
565 | char hardsoft_irq; |
566 | char need_resched; | |
567 | char irqs_off; | |
568 | int hardirq; | |
569 | int softirq; | |
637e7e86 | 570 | int ret; |
c4a8e8be | 571 | |
c4a8e8be FW |
572 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
573 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 574 | |
10da37a6 DS |
575 | irqs_off = |
576 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
577 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
578 | '.'; | |
579 | need_resched = | |
580 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'; | |
581 | hardsoft_irq = | |
582 | (hardirq && softirq) ? 'H' : | |
583 | hardirq ? 'h' : | |
584 | softirq ? 's' : | |
585 | '.'; | |
586 | ||
f81c972d | 587 | if (!trace_seq_printf(s, "%c%c%c", |
10da37a6 | 588 | irqs_off, need_resched, hardsoft_irq)) |
d9793bd8 | 589 | return 0; |
c4a8e8be | 590 | |
829b876d SR |
591 | if (entry->preempt_count) |
592 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 593 | else |
829b876d SR |
594 | ret = trace_seq_putc(s, '.'); |
595 | ||
e6e1e259 | 596 | return ret; |
c4a8e8be FW |
597 | } |
598 | ||
f81c972d SR |
599 | static int |
600 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
601 | { | |
602 | char comm[TASK_COMM_LEN]; | |
603 | ||
604 | trace_find_cmdline(entry->pid, comm); | |
605 | ||
606 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
607 | comm, entry->pid, cpu)) | |
608 | return 0; | |
609 | ||
610 | return trace_print_lat_fmt(s, entry); | |
611 | } | |
612 | ||
c4a8e8be FW |
613 | static unsigned long preempt_mark_thresh = 100; |
614 | ||
d9793bd8 | 615 | static int |
c4a8e8be FW |
616 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
617 | unsigned long rel_usecs) | |
618 | { | |
d9793bd8 ACM |
619 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
620 | rel_usecs > preempt_mark_thresh ? '!' : | |
621 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
622 | } |
623 | ||
624 | int trace_print_context(struct trace_iterator *iter) | |
625 | { | |
626 | struct trace_seq *s = &iter->seq; | |
627 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
628 | unsigned long long t = ns2usecs(iter->ts); |
629 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
630 | unsigned long secs = (unsigned long)t; | |
4ca53085 | 631 | char comm[TASK_COMM_LEN]; |
77271ce4 | 632 | int ret; |
4ca53085 SR |
633 | |
634 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 635 | |
77271ce4 SR |
636 | ret = trace_seq_printf(s, "%16s-%-5d [%03d] ", |
637 | comm, entry->pid, iter->cpu); | |
638 | if (!ret) | |
639 | return 0; | |
640 | ||
641 | if (trace_flags & TRACE_ITER_IRQ_INFO) { | |
642 | ret = trace_print_lat_fmt(s, entry); | |
643 | if (!ret) | |
644 | return 0; | |
645 | } | |
646 | ||
647 | return trace_seq_printf(s, " %5lu.%06lu: ", | |
648 | secs, usec_rem); | |
c4a8e8be FW |
649 | } |
650 | ||
651 | int trace_print_lat_context(struct trace_iterator *iter) | |
652 | { | |
653 | u64 next_ts; | |
d9793bd8 | 654 | int ret; |
db4c75cb SR |
655 | /* trace_find_next_entry will reset ent_size */ |
656 | int ent_size = iter->ent_size; | |
c4a8e8be FW |
657 | struct trace_seq *s = &iter->seq; |
658 | struct trace_entry *entry = iter->ent, | |
659 | *next_entry = trace_find_next_entry(iter, NULL, | |
660 | &next_ts); | |
661 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
662 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
663 | unsigned long rel_usecs; | |
664 | ||
db4c75cb SR |
665 | /* Restore the original ent_size */ |
666 | iter->ent_size = ent_size; | |
667 | ||
c4a8e8be FW |
668 | if (!next_entry) |
669 | next_ts = iter->ts; | |
670 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
671 | ||
672 | if (verbose) { | |
4ca53085 SR |
673 | char comm[TASK_COMM_LEN]; |
674 | ||
675 | trace_find_cmdline(entry->pid, comm); | |
676 | ||
cf8e3474 | 677 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 678 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 679 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
680 | entry->preempt_count, iter->idx, |
681 | ns2usecs(iter->ts), | |
682 | abs_usecs / USEC_PER_MSEC, | |
683 | abs_usecs % USEC_PER_MSEC, | |
684 | rel_usecs / USEC_PER_MSEC, | |
685 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 686 | } else { |
1830b52d | 687 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
688 | if (ret) |
689 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
690 | } |
691 | ||
d9793bd8 | 692 | return ret; |
c4a8e8be FW |
693 | } |
694 | ||
f633cef0 SR |
695 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
696 | ||
697 | static int task_state_char(unsigned long state) | |
698 | { | |
699 | int bit = state ? __ffs(state) + 1 : 0; | |
700 | ||
701 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
702 | } | |
703 | ||
f0868d1e SR |
704 | /** |
705 | * ftrace_find_event - find a registered event | |
706 | * @type: the type of event to look for | |
707 | * | |
708 | * Returns an event of type @type otherwise NULL | |
4f535968 | 709 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
710 | */ |
711 | struct trace_event *ftrace_find_event(int type) | |
712 | { | |
713 | struct trace_event *event; | |
714 | struct hlist_node *n; | |
715 | unsigned key; | |
716 | ||
717 | key = type & (EVENT_HASHSIZE - 1); | |
718 | ||
4f535968 | 719 | hlist_for_each_entry(event, n, &event_hash[key], node) { |
f0868d1e SR |
720 | if (event->type == type) |
721 | return event; | |
722 | } | |
723 | ||
724 | return NULL; | |
725 | } | |
726 | ||
060fa5c8 SR |
727 | static LIST_HEAD(ftrace_event_list); |
728 | ||
729 | static int trace_search_list(struct list_head **list) | |
730 | { | |
731 | struct trace_event *e; | |
732 | int last = __TRACE_LAST_TYPE; | |
733 | ||
734 | if (list_empty(&ftrace_event_list)) { | |
735 | *list = &ftrace_event_list; | |
736 | return last + 1; | |
737 | } | |
738 | ||
739 | /* | |
740 | * We used up all possible max events, | |
741 | * lets see if somebody freed one. | |
742 | */ | |
743 | list_for_each_entry(e, &ftrace_event_list, list) { | |
744 | if (e->type != last + 1) | |
745 | break; | |
746 | last++; | |
747 | } | |
748 | ||
749 | /* Did we used up all 65 thousand events??? */ | |
750 | if ((last + 1) > FTRACE_MAX_EVENT) | |
751 | return 0; | |
752 | ||
753 | *list = &e->list; | |
754 | return last + 1; | |
755 | } | |
756 | ||
4f535968 LJ |
757 | void trace_event_read_lock(void) |
758 | { | |
759 | down_read(&trace_event_mutex); | |
760 | } | |
761 | ||
762 | void trace_event_read_unlock(void) | |
763 | { | |
764 | up_read(&trace_event_mutex); | |
765 | } | |
766 | ||
f0868d1e SR |
767 | /** |
768 | * register_ftrace_event - register output for an event type | |
769 | * @event: the event type to register | |
770 | * | |
771 | * Event types are stored in a hash and this hash is used to | |
772 | * find a way to print an event. If the @event->type is set | |
773 | * then it will use that type, otherwise it will assign a | |
774 | * type to use. | |
775 | * | |
776 | * If you assign your own type, please make sure it is added | |
777 | * to the trace_type enum in trace.h, to avoid collisions | |
778 | * with the dynamic types. | |
779 | * | |
780 | * Returns the event type number or zero on error. | |
781 | */ | |
782 | int register_ftrace_event(struct trace_event *event) | |
783 | { | |
784 | unsigned key; | |
785 | int ret = 0; | |
786 | ||
4f535968 | 787 | down_write(&trace_event_mutex); |
f0868d1e | 788 | |
060fa5c8 | 789 | if (WARN_ON(!event)) |
28bea271 | 790 | goto out; |
28bea271 | 791 | |
a9a57763 SR |
792 | if (WARN_ON(!event->funcs)) |
793 | goto out; | |
794 | ||
060fa5c8 SR |
795 | INIT_LIST_HEAD(&event->list); |
796 | ||
797 | if (!event->type) { | |
48dd0fed | 798 | struct list_head *list = NULL; |
060fa5c8 SR |
799 | |
800 | if (next_event_type > FTRACE_MAX_EVENT) { | |
801 | ||
802 | event->type = trace_search_list(&list); | |
803 | if (!event->type) | |
804 | goto out; | |
805 | ||
806 | } else { | |
807 | ||
808 | event->type = next_event_type++; | |
809 | list = &ftrace_event_list; | |
810 | } | |
811 | ||
812 | if (WARN_ON(ftrace_find_event(event->type))) | |
813 | goto out; | |
814 | ||
815 | list_add_tail(&event->list, list); | |
816 | ||
817 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
818 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
819 | WARN_ON(1); | |
f0868d1e | 820 | goto out; |
060fa5c8 SR |
821 | } else { |
822 | /* Is this event already used */ | |
823 | if (ftrace_find_event(event->type)) | |
824 | goto out; | |
825 | } | |
f0868d1e | 826 | |
a9a57763 SR |
827 | if (event->funcs->trace == NULL) |
828 | event->funcs->trace = trace_nop_print; | |
829 | if (event->funcs->raw == NULL) | |
830 | event->funcs->raw = trace_nop_print; | |
831 | if (event->funcs->hex == NULL) | |
832 | event->funcs->hex = trace_nop_print; | |
833 | if (event->funcs->binary == NULL) | |
834 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 835 | |
f0868d1e SR |
836 | key = event->type & (EVENT_HASHSIZE - 1); |
837 | ||
4f535968 | 838 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
839 | |
840 | ret = event->type; | |
841 | out: | |
4f535968 | 842 | up_write(&trace_event_mutex); |
f0868d1e SR |
843 | |
844 | return ret; | |
845 | } | |
17c873ec | 846 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 847 | |
110bf2b7 SR |
848 | /* |
849 | * Used by module code with the trace_event_mutex held for write. | |
850 | */ | |
851 | int __unregister_ftrace_event(struct trace_event *event) | |
852 | { | |
853 | hlist_del(&event->node); | |
854 | list_del(&event->list); | |
855 | return 0; | |
856 | } | |
857 | ||
f0868d1e SR |
858 | /** |
859 | * unregister_ftrace_event - remove a no longer used event | |
860 | * @event: the event to remove | |
861 | */ | |
862 | int unregister_ftrace_event(struct trace_event *event) | |
863 | { | |
4f535968 | 864 | down_write(&trace_event_mutex); |
110bf2b7 | 865 | __unregister_ftrace_event(event); |
4f535968 | 866 | up_write(&trace_event_mutex); |
f0868d1e SR |
867 | |
868 | return 0; | |
869 | } | |
17c873ec | 870 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
871 | |
872 | /* | |
873 | * Standard events | |
874 | */ | |
875 | ||
a9a57763 SR |
876 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
877 | struct trace_event *event) | |
f633cef0 | 878 | { |
ee5e51f5 JO |
879 | if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type)) |
880 | return TRACE_TYPE_PARTIAL_LINE; | |
881 | ||
d9793bd8 | 882 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
883 | } |
884 | ||
885 | /* TRACE_FN */ | |
a9a57763 SR |
886 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
887 | struct trace_event *event) | |
f633cef0 SR |
888 | { |
889 | struct ftrace_entry *field; | |
2c9b238e | 890 | struct trace_seq *s = &iter->seq; |
f633cef0 | 891 | |
2c9b238e | 892 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
893 | |
894 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
895 | goto partial; | |
896 | ||
897 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
898 | if (!trace_seq_printf(s, " <-")) | |
899 | goto partial; | |
900 | if (!seq_print_ip_sym(s, | |
901 | field->parent_ip, | |
902 | flags)) | |
903 | goto partial; | |
904 | } | |
905 | if (!trace_seq_printf(s, "\n")) | |
906 | goto partial; | |
907 | ||
d9793bd8 | 908 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
909 | |
910 | partial: | |
911 | return TRACE_TYPE_PARTIAL_LINE; | |
912 | } | |
913 | ||
a9a57763 SR |
914 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
915 | struct trace_event *event) | |
f633cef0 SR |
916 | { |
917 | struct ftrace_entry *field; | |
918 | ||
2c9b238e | 919 | trace_assign_type(field, iter->ent); |
f633cef0 | 920 | |
2c9b238e | 921 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
922 | field->ip, |
923 | field->parent_ip)) | |
f633cef0 SR |
924 | return TRACE_TYPE_PARTIAL_LINE; |
925 | ||
d9793bd8 | 926 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
927 | } |
928 | ||
a9a57763 SR |
929 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
930 | struct trace_event *event) | |
f633cef0 SR |
931 | { |
932 | struct ftrace_entry *field; | |
2c9b238e | 933 | struct trace_seq *s = &iter->seq; |
f633cef0 | 934 | |
2c9b238e | 935 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
936 | |
937 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
938 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
939 | ||
d9793bd8 | 940 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
941 | } |
942 | ||
a9a57763 SR |
943 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
944 | struct trace_event *event) | |
f633cef0 SR |
945 | { |
946 | struct ftrace_entry *field; | |
2c9b238e | 947 | struct trace_seq *s = &iter->seq; |
f633cef0 | 948 | |
2c9b238e | 949 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
950 | |
951 | SEQ_PUT_FIELD_RET(s, field->ip); | |
952 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
953 | ||
d9793bd8 | 954 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
955 | } |
956 | ||
a9a57763 | 957 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 958 | .trace = trace_fn_trace, |
f633cef0 SR |
959 | .raw = trace_fn_raw, |
960 | .hex = trace_fn_hex, | |
961 | .binary = trace_fn_bin, | |
962 | }; | |
963 | ||
a9a57763 SR |
964 | static struct trace_event trace_fn_event = { |
965 | .type = TRACE_FN, | |
966 | .funcs = &trace_fn_funcs, | |
967 | }; | |
968 | ||
f633cef0 | 969 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
970 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
971 | char *delim) | |
f633cef0 SR |
972 | { |
973 | struct ctx_switch_entry *field; | |
4ca53085 | 974 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
975 | int S, T; |
976 | ||
4ca53085 | 977 | |
2c9b238e | 978 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
979 | |
980 | T = task_state_char(field->next_state); | |
981 | S = task_state_char(field->prev_state); | |
4ca53085 | 982 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
983 | if (!trace_seq_printf(&iter->seq, |
984 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
985 | field->prev_pid, |
986 | field->prev_prio, | |
987 | S, delim, | |
988 | field->next_cpu, | |
989 | field->next_pid, | |
990 | field->next_prio, | |
991 | T, comm)) | |
f633cef0 SR |
992 | return TRACE_TYPE_PARTIAL_LINE; |
993 | ||
d9793bd8 | 994 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
995 | } |
996 | ||
a9a57763 SR |
997 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
998 | struct trace_event *event) | |
f633cef0 | 999 | { |
2c9b238e | 1000 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
1001 | } |
1002 | ||
ae7462b4 | 1003 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 1004 | int flags, struct trace_event *event) |
f633cef0 | 1005 | { |
2c9b238e | 1006 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
1007 | } |
1008 | ||
2c9b238e | 1009 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
1010 | { |
1011 | struct ctx_switch_entry *field; | |
1012 | int T; | |
1013 | ||
2c9b238e | 1014 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1015 | |
1016 | if (!S) | |
b0f56f1a | 1017 | S = task_state_char(field->prev_state); |
f633cef0 | 1018 | T = task_state_char(field->next_state); |
2c9b238e | 1019 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
1020 | field->prev_pid, |
1021 | field->prev_prio, | |
1022 | S, | |
1023 | field->next_cpu, | |
1024 | field->next_pid, | |
1025 | field->next_prio, | |
1026 | T)) | |
f633cef0 SR |
1027 | return TRACE_TYPE_PARTIAL_LINE; |
1028 | ||
d9793bd8 | 1029 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1030 | } |
1031 | ||
a9a57763 SR |
1032 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
1033 | struct trace_event *event) | |
f633cef0 | 1034 | { |
2c9b238e | 1035 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
1036 | } |
1037 | ||
a9a57763 SR |
1038 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
1039 | struct trace_event *event) | |
f633cef0 | 1040 | { |
2c9b238e | 1041 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
1042 | } |
1043 | ||
1044 | ||
2c9b238e | 1045 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
1046 | { |
1047 | struct ctx_switch_entry *field; | |
2c9b238e | 1048 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1049 | int T; |
1050 | ||
2c9b238e | 1051 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1052 | |
1053 | if (!S) | |
b0f56f1a | 1054 | S = task_state_char(field->prev_state); |
f633cef0 SR |
1055 | T = task_state_char(field->next_state); |
1056 | ||
1057 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
1058 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
1059 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
1060 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
1061 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
1062 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
1063 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
1064 | ||
d9793bd8 | 1065 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1066 | } |
1067 | ||
a9a57763 SR |
1068 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1069 | struct trace_event *event) | |
f633cef0 | 1070 | { |
2c9b238e | 1071 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1072 | } |
1073 | ||
a9a57763 SR |
1074 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1075 | struct trace_event *event) | |
f633cef0 | 1076 | { |
2c9b238e | 1077 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1078 | } |
1079 | ||
ae7462b4 | 1080 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1081 | int flags, struct trace_event *event) |
f633cef0 SR |
1082 | { |
1083 | struct ctx_switch_entry *field; | |
2c9b238e | 1084 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1085 | |
2c9b238e | 1086 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1087 | |
1088 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
1089 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
1090 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
1091 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
1092 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
1093 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
1094 | ||
d9793bd8 | 1095 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1096 | } |
1097 | ||
a9a57763 | 1098 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1099 | .trace = trace_ctx_print, |
f633cef0 SR |
1100 | .raw = trace_ctx_raw, |
1101 | .hex = trace_ctx_hex, | |
1102 | .binary = trace_ctxwake_bin, | |
1103 | }; | |
1104 | ||
a9a57763 SR |
1105 | static struct trace_event trace_ctx_event = { |
1106 | .type = TRACE_CTX, | |
1107 | .funcs = &trace_ctx_funcs, | |
1108 | }; | |
1109 | ||
1110 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1111 | .trace = trace_wake_print, |
f633cef0 SR |
1112 | .raw = trace_wake_raw, |
1113 | .hex = trace_wake_hex, | |
1114 | .binary = trace_ctxwake_bin, | |
1115 | }; | |
1116 | ||
a9a57763 SR |
1117 | static struct trace_event trace_wake_event = { |
1118 | .type = TRACE_WAKE, | |
1119 | .funcs = &trace_wake_funcs, | |
1120 | }; | |
1121 | ||
f633cef0 SR |
1122 | /* TRACE_STACK */ |
1123 | ||
ae7462b4 | 1124 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1125 | int flags, struct trace_event *event) |
f633cef0 SR |
1126 | { |
1127 | struct stack_entry *field; | |
2c9b238e | 1128 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1129 | unsigned long *p; |
1130 | unsigned long *end; | |
f633cef0 | 1131 | |
2c9b238e | 1132 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1133 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1134 | |
563af16c | 1135 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1136 | goto partial; |
4a9bd3f1 SR |
1137 | |
1138 | for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { | |
f11b3f4e | 1139 | if (!trace_seq_puts(s, " => ")) |
1140 | goto partial; | |
f633cef0 | 1141 | |
4a9bd3f1 | 1142 | if (!seq_print_ip_sym(s, *p, flags)) |
f11b3f4e | 1143 | goto partial; |
6c1a99af | 1144 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
1145 | goto partial; |
1146 | } | |
1147 | ||
d9793bd8 | 1148 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1149 | |
1150 | partial: | |
1151 | return TRACE_TYPE_PARTIAL_LINE; | |
1152 | } | |
1153 | ||
a9a57763 | 1154 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1155 | .trace = trace_stack_print, |
f633cef0 SR |
1156 | }; |
1157 | ||
a9a57763 SR |
1158 | static struct trace_event trace_stack_event = { |
1159 | .type = TRACE_STACK, | |
1160 | .funcs = &trace_stack_funcs, | |
1161 | }; | |
1162 | ||
f633cef0 | 1163 | /* TRACE_USER_STACK */ |
ae7462b4 | 1164 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1165 | int flags, struct trace_event *event) |
f633cef0 SR |
1166 | { |
1167 | struct userstack_entry *field; | |
2c9b238e | 1168 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1169 | |
2c9b238e | 1170 | trace_assign_type(field, iter->ent); |
f633cef0 | 1171 | |
563af16c | 1172 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1173 | goto partial; |
1174 | ||
048dc50c | 1175 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1176 | goto partial; |
1177 | ||
d9793bd8 | 1178 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1179 | |
1180 | partial: | |
1181 | return TRACE_TYPE_PARTIAL_LINE; | |
1182 | } | |
1183 | ||
a9a57763 | 1184 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1185 | .trace = trace_user_stack_print, |
f633cef0 SR |
1186 | }; |
1187 | ||
a9a57763 SR |
1188 | static struct trace_event trace_user_stack_event = { |
1189 | .type = TRACE_USER_STACK, | |
1190 | .funcs = &trace_user_stack_funcs, | |
1191 | }; | |
1192 | ||
48ead020 | 1193 | /* TRACE_BPRINT */ |
1427cdf0 | 1194 | static enum print_line_t |
a9a57763 SR |
1195 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1196 | struct trace_event *event) | |
1427cdf0 LJ |
1197 | { |
1198 | struct trace_entry *entry = iter->ent; | |
1199 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1200 | struct bprint_entry *field; |
1427cdf0 LJ |
1201 | |
1202 | trace_assign_type(field, entry); | |
1203 | ||
1204 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1205 | goto partial; | |
1206 | ||
1207 | if (!trace_seq_puts(s, ": ")) | |
1208 | goto partial; | |
1209 | ||
1210 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1211 | goto partial; | |
1212 | ||
1213 | return TRACE_TYPE_HANDLED; | |
1214 | ||
1215 | partial: | |
1216 | return TRACE_TYPE_PARTIAL_LINE; | |
1217 | } | |
1218 | ||
769b0441 | 1219 | |
48ead020 | 1220 | static enum print_line_t |
a9a57763 SR |
1221 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1222 | struct trace_event *event) | |
1427cdf0 | 1223 | { |
48ead020 | 1224 | struct bprint_entry *field; |
1427cdf0 | 1225 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1226 | |
769b0441 | 1227 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1228 | |
1229 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1230 | goto partial; | |
1231 | ||
1232 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1233 | goto partial; | |
1234 | ||
1235 | return TRACE_TYPE_HANDLED; | |
1236 | ||
1237 | partial: | |
1238 | return TRACE_TYPE_PARTIAL_LINE; | |
1239 | } | |
1240 | ||
a9a57763 SR |
1241 | static struct trace_event_functions trace_bprint_funcs = { |
1242 | .trace = trace_bprint_print, | |
1243 | .raw = trace_bprint_raw, | |
1244 | }; | |
769b0441 | 1245 | |
48ead020 FW |
1246 | static struct trace_event trace_bprint_event = { |
1247 | .type = TRACE_BPRINT, | |
a9a57763 | 1248 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1249 | }; |
1250 | ||
1251 | /* TRACE_PRINT */ | |
1252 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1253 | int flags, struct trace_event *event) |
48ead020 FW |
1254 | { |
1255 | struct print_entry *field; | |
1256 | struct trace_seq *s = &iter->seq; | |
1257 | ||
1258 | trace_assign_type(field, iter->ent); | |
1259 | ||
1260 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1261 | goto partial; | |
1262 | ||
1263 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1264 | goto partial; | |
1265 | ||
1266 | return TRACE_TYPE_HANDLED; | |
1267 | ||
1268 | partial: | |
1269 | return TRACE_TYPE_PARTIAL_LINE; | |
1270 | } | |
1271 | ||
a9a57763 SR |
1272 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1273 | struct trace_event *event) | |
48ead020 FW |
1274 | { |
1275 | struct print_entry *field; | |
1276 | ||
1277 | trace_assign_type(field, iter->ent); | |
1278 | ||
1279 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1280 | goto partial; | |
1281 | ||
1282 | return TRACE_TYPE_HANDLED; | |
1283 | ||
1284 | partial: | |
1285 | return TRACE_TYPE_PARTIAL_LINE; | |
1286 | } | |
1287 | ||
a9a57763 | 1288 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1289 | .trace = trace_print_print, |
1290 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1291 | }; |
1292 | ||
a9a57763 SR |
1293 | static struct trace_event trace_print_event = { |
1294 | .type = TRACE_PRINT, | |
1295 | .funcs = &trace_print_funcs, | |
1296 | }; | |
1297 | ||
48ead020 | 1298 | |
f633cef0 SR |
1299 | static struct trace_event *events[] __initdata = { |
1300 | &trace_fn_event, | |
1301 | &trace_ctx_event, | |
1302 | &trace_wake_event, | |
f633cef0 SR |
1303 | &trace_stack_event, |
1304 | &trace_user_stack_event, | |
48ead020 | 1305 | &trace_bprint_event, |
f633cef0 SR |
1306 | &trace_print_event, |
1307 | NULL | |
1308 | }; | |
1309 | ||
1310 | __init static int init_events(void) | |
1311 | { | |
1312 | struct trace_event *event; | |
1313 | int i, ret; | |
1314 | ||
1315 | for (i = 0; events[i]; i++) { | |
1316 | event = events[i]; | |
1317 | ||
1318 | ret = register_ftrace_event(event); | |
1319 | if (!ret) { | |
1320 | printk(KERN_WARNING "event %d failed to register\n", | |
1321 | event->type); | |
1322 | WARN_ON_ONCE(1); | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | return 0; | |
1327 | } | |
7374e827 | 1328 | early_initcall(init_events); |