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 | |
5a2e3995 KT |
356 | const char * |
357 | ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) | |
358 | { | |
359 | int i; | |
360 | const char *ret = p->buffer + p->len; | |
361 | ||
362 | for (i = 0; i < buf_len; i++) | |
363 | trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]); | |
364 | ||
365 | trace_seq_putc(p, 0); | |
366 | ||
367 | return ret; | |
368 | } | |
369 | EXPORT_SYMBOL(ftrace_print_hex_seq); | |
370 | ||
f0868d1e SR |
371 | #ifdef CONFIG_KRETPROBES |
372 | static inline const char *kretprobed(const char *name) | |
373 | { | |
374 | static const char tramp_name[] = "kretprobe_trampoline"; | |
375 | int size = sizeof(tramp_name); | |
376 | ||
377 | if (strncmp(tramp_name, name, size) == 0) | |
378 | return "[unknown/kretprobe'd]"; | |
379 | return name; | |
380 | } | |
381 | #else | |
382 | static inline const char *kretprobed(const char *name) | |
383 | { | |
384 | return name; | |
385 | } | |
386 | #endif /* CONFIG_KRETPROBES */ | |
387 | ||
388 | static int | |
389 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
390 | { | |
391 | #ifdef CONFIG_KALLSYMS | |
392 | char str[KSYM_SYMBOL_LEN]; | |
393 | const char *name; | |
394 | ||
395 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
396 | ||
397 | name = kretprobed(str); | |
398 | ||
399 | return trace_seq_printf(s, fmt, name); | |
400 | #endif | |
401 | return 1; | |
402 | } | |
403 | ||
404 | static int | |
405 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
406 | unsigned long address) | |
407 | { | |
408 | #ifdef CONFIG_KALLSYMS | |
409 | char str[KSYM_SYMBOL_LEN]; | |
410 | const char *name; | |
411 | ||
412 | sprint_symbol(str, address); | |
413 | name = kretprobed(str); | |
414 | ||
415 | return trace_seq_printf(s, fmt, name); | |
416 | #endif | |
417 | return 1; | |
418 | } | |
419 | ||
420 | #ifndef CONFIG_64BIT | |
421 | # define IP_FMT "%08lx" | |
422 | #else | |
423 | # define IP_FMT "%016lx" | |
424 | #endif | |
425 | ||
426 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
427 | unsigned long ip, unsigned long sym_flags) | |
428 | { | |
429 | struct file *file = NULL; | |
430 | unsigned long vmstart = 0; | |
431 | int ret = 1; | |
432 | ||
d184b31c JB |
433 | if (s->full) |
434 | return 0; | |
435 | ||
f0868d1e SR |
436 | if (mm) { |
437 | const struct vm_area_struct *vma; | |
438 | ||
439 | down_read(&mm->mmap_sem); | |
440 | vma = find_vma(mm, ip); | |
441 | if (vma) { | |
442 | file = vma->vm_file; | |
443 | vmstart = vma->vm_start; | |
444 | } | |
445 | if (file) { | |
446 | ret = trace_seq_path(s, &file->f_path); | |
447 | if (ret) | |
448 | ret = trace_seq_printf(s, "[+0x%lx]", | |
449 | ip - vmstart); | |
450 | } | |
451 | up_read(&mm->mmap_sem); | |
452 | } | |
453 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
454 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
455 | return ret; | |
456 | } | |
457 | ||
458 | int | |
459 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
460 | unsigned long sym_flags) | |
461 | { | |
462 | struct mm_struct *mm = NULL; | |
463 | int ret = 1; | |
464 | unsigned int i; | |
465 | ||
466 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
467 | struct task_struct *task; | |
468 | /* | |
469 | * we do the lookup on the thread group leader, | |
470 | * since individual threads might have already quit! | |
471 | */ | |
472 | rcu_read_lock(); | |
48659d31 | 473 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
474 | if (task) |
475 | mm = get_task_mm(task); | |
476 | rcu_read_unlock(); | |
477 | } | |
478 | ||
479 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
480 | unsigned long ip = entry->caller[i]; | |
481 | ||
482 | if (ip == ULONG_MAX || !ret) | |
483 | break; | |
048dc50c | 484 | if (ret) |
485 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
486 | if (!ip) { |
487 | if (ret) | |
488 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 489 | if (ret) |
490 | ret = trace_seq_puts(s, "\n"); | |
f0868d1e SR |
491 | continue; |
492 | } | |
493 | if (!ret) | |
494 | break; | |
495 | if (ret) | |
496 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
048dc50c | 497 | ret = trace_seq_puts(s, "\n"); |
f0868d1e SR |
498 | } |
499 | ||
500 | if (mm) | |
501 | mmput(mm); | |
502 | return ret; | |
503 | } | |
504 | ||
505 | int | |
506 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
507 | { | |
508 | int ret; | |
509 | ||
510 | if (!ip) | |
511 | return trace_seq_printf(s, "0"); | |
512 | ||
513 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
514 | ret = seq_print_sym_offset(s, "%s", ip); | |
515 | else | |
516 | ret = seq_print_sym_short(s, "%s", ip); | |
517 | ||
518 | if (!ret) | |
519 | return 0; | |
520 | ||
521 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
522 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
523 | return ret; | |
524 | } | |
525 | ||
f81c972d SR |
526 | /** |
527 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
528 | * @s: trace seq struct to write to | |
529 | * @entry: The trace entry field from the ring buffer | |
530 | * | |
531 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 532 | * count. |
f81c972d SR |
533 | */ |
534 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 535 | { |
10da37a6 DS |
536 | char hardsoft_irq; |
537 | char need_resched; | |
538 | char irqs_off; | |
539 | int hardirq; | |
540 | int softirq; | |
637e7e86 | 541 | int ret; |
c4a8e8be | 542 | |
c4a8e8be FW |
543 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
544 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 545 | |
10da37a6 DS |
546 | irqs_off = |
547 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
548 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
549 | '.'; | |
550 | need_resched = | |
551 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'; | |
552 | hardsoft_irq = | |
553 | (hardirq && softirq) ? 'H' : | |
554 | hardirq ? 'h' : | |
555 | softirq ? 's' : | |
556 | '.'; | |
557 | ||
f81c972d | 558 | if (!trace_seq_printf(s, "%c%c%c", |
10da37a6 | 559 | irqs_off, need_resched, hardsoft_irq)) |
d9793bd8 | 560 | return 0; |
c4a8e8be | 561 | |
829b876d SR |
562 | if (entry->preempt_count) |
563 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 564 | else |
829b876d SR |
565 | ret = trace_seq_putc(s, '.'); |
566 | ||
e6e1e259 | 567 | return ret; |
c4a8e8be FW |
568 | } |
569 | ||
f81c972d SR |
570 | static int |
571 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
572 | { | |
573 | char comm[TASK_COMM_LEN]; | |
574 | ||
575 | trace_find_cmdline(entry->pid, comm); | |
576 | ||
577 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
578 | comm, entry->pid, cpu)) | |
579 | return 0; | |
580 | ||
581 | return trace_print_lat_fmt(s, entry); | |
582 | } | |
583 | ||
c4a8e8be FW |
584 | static unsigned long preempt_mark_thresh = 100; |
585 | ||
d9793bd8 | 586 | static int |
c4a8e8be FW |
587 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
588 | unsigned long rel_usecs) | |
589 | { | |
d9793bd8 ACM |
590 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
591 | rel_usecs > preempt_mark_thresh ? '!' : | |
592 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
593 | } |
594 | ||
595 | int trace_print_context(struct trace_iterator *iter) | |
596 | { | |
597 | struct trace_seq *s = &iter->seq; | |
598 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
599 | unsigned long long t = ns2usecs(iter->ts); |
600 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
601 | unsigned long secs = (unsigned long)t; | |
4ca53085 SR |
602 | char comm[TASK_COMM_LEN]; |
603 | ||
604 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 605 | |
d9793bd8 | 606 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
1830b52d | 607 | comm, entry->pid, iter->cpu, secs, usec_rem); |
c4a8e8be FW |
608 | } |
609 | ||
610 | int trace_print_lat_context(struct trace_iterator *iter) | |
611 | { | |
612 | u64 next_ts; | |
d9793bd8 | 613 | int ret; |
c4a8e8be FW |
614 | struct trace_seq *s = &iter->seq; |
615 | struct trace_entry *entry = iter->ent, | |
616 | *next_entry = trace_find_next_entry(iter, NULL, | |
617 | &next_ts); | |
618 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
619 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
620 | unsigned long rel_usecs; | |
621 | ||
622 | if (!next_entry) | |
623 | next_ts = iter->ts; | |
624 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
625 | ||
626 | if (verbose) { | |
4ca53085 SR |
627 | char comm[TASK_COMM_LEN]; |
628 | ||
629 | trace_find_cmdline(entry->pid, comm); | |
630 | ||
cf8e3474 | 631 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 632 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 633 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
634 | entry->preempt_count, iter->idx, |
635 | ns2usecs(iter->ts), | |
636 | abs_usecs / USEC_PER_MSEC, | |
637 | abs_usecs % USEC_PER_MSEC, | |
638 | rel_usecs / USEC_PER_MSEC, | |
639 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 640 | } else { |
1830b52d | 641 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
642 | if (ret) |
643 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
644 | } |
645 | ||
d9793bd8 | 646 | return ret; |
c4a8e8be FW |
647 | } |
648 | ||
f633cef0 SR |
649 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
650 | ||
651 | static int task_state_char(unsigned long state) | |
652 | { | |
653 | int bit = state ? __ffs(state) + 1 : 0; | |
654 | ||
655 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
656 | } | |
657 | ||
f0868d1e SR |
658 | /** |
659 | * ftrace_find_event - find a registered event | |
660 | * @type: the type of event to look for | |
661 | * | |
662 | * Returns an event of type @type otherwise NULL | |
4f535968 | 663 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
664 | */ |
665 | struct trace_event *ftrace_find_event(int type) | |
666 | { | |
667 | struct trace_event *event; | |
668 | struct hlist_node *n; | |
669 | unsigned key; | |
670 | ||
671 | key = type & (EVENT_HASHSIZE - 1); | |
672 | ||
4f535968 | 673 | hlist_for_each_entry(event, n, &event_hash[key], node) { |
f0868d1e SR |
674 | if (event->type == type) |
675 | return event; | |
676 | } | |
677 | ||
678 | return NULL; | |
679 | } | |
680 | ||
060fa5c8 SR |
681 | static LIST_HEAD(ftrace_event_list); |
682 | ||
683 | static int trace_search_list(struct list_head **list) | |
684 | { | |
685 | struct trace_event *e; | |
686 | int last = __TRACE_LAST_TYPE; | |
687 | ||
688 | if (list_empty(&ftrace_event_list)) { | |
689 | *list = &ftrace_event_list; | |
690 | return last + 1; | |
691 | } | |
692 | ||
693 | /* | |
694 | * We used up all possible max events, | |
695 | * lets see if somebody freed one. | |
696 | */ | |
697 | list_for_each_entry(e, &ftrace_event_list, list) { | |
698 | if (e->type != last + 1) | |
699 | break; | |
700 | last++; | |
701 | } | |
702 | ||
703 | /* Did we used up all 65 thousand events??? */ | |
704 | if ((last + 1) > FTRACE_MAX_EVENT) | |
705 | return 0; | |
706 | ||
707 | *list = &e->list; | |
708 | return last + 1; | |
709 | } | |
710 | ||
4f535968 LJ |
711 | void trace_event_read_lock(void) |
712 | { | |
713 | down_read(&trace_event_mutex); | |
714 | } | |
715 | ||
716 | void trace_event_read_unlock(void) | |
717 | { | |
718 | up_read(&trace_event_mutex); | |
719 | } | |
720 | ||
f0868d1e SR |
721 | /** |
722 | * register_ftrace_event - register output for an event type | |
723 | * @event: the event type to register | |
724 | * | |
725 | * Event types are stored in a hash and this hash is used to | |
726 | * find a way to print an event. If the @event->type is set | |
727 | * then it will use that type, otherwise it will assign a | |
728 | * type to use. | |
729 | * | |
730 | * If you assign your own type, please make sure it is added | |
731 | * to the trace_type enum in trace.h, to avoid collisions | |
732 | * with the dynamic types. | |
733 | * | |
734 | * Returns the event type number or zero on error. | |
735 | */ | |
736 | int register_ftrace_event(struct trace_event *event) | |
737 | { | |
738 | unsigned key; | |
739 | int ret = 0; | |
740 | ||
4f535968 | 741 | down_write(&trace_event_mutex); |
f0868d1e | 742 | |
060fa5c8 | 743 | if (WARN_ON(!event)) |
28bea271 | 744 | goto out; |
28bea271 | 745 | |
a9a57763 SR |
746 | if (WARN_ON(!event->funcs)) |
747 | goto out; | |
748 | ||
060fa5c8 SR |
749 | INIT_LIST_HEAD(&event->list); |
750 | ||
751 | if (!event->type) { | |
48dd0fed | 752 | struct list_head *list = NULL; |
060fa5c8 SR |
753 | |
754 | if (next_event_type > FTRACE_MAX_EVENT) { | |
755 | ||
756 | event->type = trace_search_list(&list); | |
757 | if (!event->type) | |
758 | goto out; | |
759 | ||
760 | } else { | |
761 | ||
762 | event->type = next_event_type++; | |
763 | list = &ftrace_event_list; | |
764 | } | |
765 | ||
766 | if (WARN_ON(ftrace_find_event(event->type))) | |
767 | goto out; | |
768 | ||
769 | list_add_tail(&event->list, list); | |
770 | ||
771 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
772 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
773 | WARN_ON(1); | |
f0868d1e | 774 | goto out; |
060fa5c8 SR |
775 | } else { |
776 | /* Is this event already used */ | |
777 | if (ftrace_find_event(event->type)) | |
778 | goto out; | |
779 | } | |
f0868d1e | 780 | |
a9a57763 SR |
781 | if (event->funcs->trace == NULL) |
782 | event->funcs->trace = trace_nop_print; | |
783 | if (event->funcs->raw == NULL) | |
784 | event->funcs->raw = trace_nop_print; | |
785 | if (event->funcs->hex == NULL) | |
786 | event->funcs->hex = trace_nop_print; | |
787 | if (event->funcs->binary == NULL) | |
788 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 789 | |
f0868d1e SR |
790 | key = event->type & (EVENT_HASHSIZE - 1); |
791 | ||
4f535968 | 792 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
793 | |
794 | ret = event->type; | |
795 | out: | |
4f535968 | 796 | up_write(&trace_event_mutex); |
f0868d1e SR |
797 | |
798 | return ret; | |
799 | } | |
17c873ec | 800 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 801 | |
110bf2b7 SR |
802 | /* |
803 | * Used by module code with the trace_event_mutex held for write. | |
804 | */ | |
805 | int __unregister_ftrace_event(struct trace_event *event) | |
806 | { | |
807 | hlist_del(&event->node); | |
808 | list_del(&event->list); | |
809 | return 0; | |
810 | } | |
811 | ||
f0868d1e SR |
812 | /** |
813 | * unregister_ftrace_event - remove a no longer used event | |
814 | * @event: the event to remove | |
815 | */ | |
816 | int unregister_ftrace_event(struct trace_event *event) | |
817 | { | |
4f535968 | 818 | down_write(&trace_event_mutex); |
110bf2b7 | 819 | __unregister_ftrace_event(event); |
4f535968 | 820 | up_write(&trace_event_mutex); |
f0868d1e SR |
821 | |
822 | return 0; | |
823 | } | |
17c873ec | 824 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
825 | |
826 | /* | |
827 | * Standard events | |
828 | */ | |
829 | ||
a9a57763 SR |
830 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
831 | struct trace_event *event) | |
f633cef0 | 832 | { |
ee5e51f5 JO |
833 | if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type)) |
834 | return TRACE_TYPE_PARTIAL_LINE; | |
835 | ||
d9793bd8 | 836 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
837 | } |
838 | ||
839 | /* TRACE_FN */ | |
a9a57763 SR |
840 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
841 | struct trace_event *event) | |
f633cef0 SR |
842 | { |
843 | struct ftrace_entry *field; | |
2c9b238e | 844 | struct trace_seq *s = &iter->seq; |
f633cef0 | 845 | |
2c9b238e | 846 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
847 | |
848 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
849 | goto partial; | |
850 | ||
851 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
852 | if (!trace_seq_printf(s, " <-")) | |
853 | goto partial; | |
854 | if (!seq_print_ip_sym(s, | |
855 | field->parent_ip, | |
856 | flags)) | |
857 | goto partial; | |
858 | } | |
859 | if (!trace_seq_printf(s, "\n")) | |
860 | goto partial; | |
861 | ||
d9793bd8 | 862 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
863 | |
864 | partial: | |
865 | return TRACE_TYPE_PARTIAL_LINE; | |
866 | } | |
867 | ||
a9a57763 SR |
868 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
869 | struct trace_event *event) | |
f633cef0 SR |
870 | { |
871 | struct ftrace_entry *field; | |
872 | ||
2c9b238e | 873 | trace_assign_type(field, iter->ent); |
f633cef0 | 874 | |
2c9b238e | 875 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
876 | field->ip, |
877 | field->parent_ip)) | |
f633cef0 SR |
878 | return TRACE_TYPE_PARTIAL_LINE; |
879 | ||
d9793bd8 | 880 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
881 | } |
882 | ||
a9a57763 SR |
883 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
884 | struct trace_event *event) | |
f633cef0 SR |
885 | { |
886 | struct ftrace_entry *field; | |
2c9b238e | 887 | struct trace_seq *s = &iter->seq; |
f633cef0 | 888 | |
2c9b238e | 889 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
890 | |
891 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
892 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
893 | ||
d9793bd8 | 894 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
895 | } |
896 | ||
a9a57763 SR |
897 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
898 | struct trace_event *event) | |
f633cef0 SR |
899 | { |
900 | struct ftrace_entry *field; | |
2c9b238e | 901 | struct trace_seq *s = &iter->seq; |
f633cef0 | 902 | |
2c9b238e | 903 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
904 | |
905 | SEQ_PUT_FIELD_RET(s, field->ip); | |
906 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
907 | ||
d9793bd8 | 908 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
909 | } |
910 | ||
a9a57763 | 911 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 912 | .trace = trace_fn_trace, |
f633cef0 SR |
913 | .raw = trace_fn_raw, |
914 | .hex = trace_fn_hex, | |
915 | .binary = trace_fn_bin, | |
916 | }; | |
917 | ||
a9a57763 SR |
918 | static struct trace_event trace_fn_event = { |
919 | .type = TRACE_FN, | |
920 | .funcs = &trace_fn_funcs, | |
921 | }; | |
922 | ||
f633cef0 | 923 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
924 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
925 | char *delim) | |
f633cef0 SR |
926 | { |
927 | struct ctx_switch_entry *field; | |
4ca53085 | 928 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
929 | int S, T; |
930 | ||
4ca53085 | 931 | |
2c9b238e | 932 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
933 | |
934 | T = task_state_char(field->next_state); | |
935 | S = task_state_char(field->prev_state); | |
4ca53085 | 936 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
937 | if (!trace_seq_printf(&iter->seq, |
938 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
939 | field->prev_pid, |
940 | field->prev_prio, | |
941 | S, delim, | |
942 | field->next_cpu, | |
943 | field->next_pid, | |
944 | field->next_prio, | |
945 | T, comm)) | |
f633cef0 SR |
946 | return TRACE_TYPE_PARTIAL_LINE; |
947 | ||
d9793bd8 | 948 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
949 | } |
950 | ||
a9a57763 SR |
951 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
952 | struct trace_event *event) | |
f633cef0 | 953 | { |
2c9b238e | 954 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
955 | } |
956 | ||
ae7462b4 | 957 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 958 | int flags, struct trace_event *event) |
f633cef0 | 959 | { |
2c9b238e | 960 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
961 | } |
962 | ||
2c9b238e | 963 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
964 | { |
965 | struct ctx_switch_entry *field; | |
966 | int T; | |
967 | ||
2c9b238e | 968 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
969 | |
970 | if (!S) | |
b0f56f1a | 971 | S = task_state_char(field->prev_state); |
f633cef0 | 972 | T = task_state_char(field->next_state); |
2c9b238e | 973 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
974 | field->prev_pid, |
975 | field->prev_prio, | |
976 | S, | |
977 | field->next_cpu, | |
978 | field->next_pid, | |
979 | field->next_prio, | |
980 | T)) | |
f633cef0 SR |
981 | return TRACE_TYPE_PARTIAL_LINE; |
982 | ||
d9793bd8 | 983 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
984 | } |
985 | ||
a9a57763 SR |
986 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
987 | struct trace_event *event) | |
f633cef0 | 988 | { |
2c9b238e | 989 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
990 | } |
991 | ||
a9a57763 SR |
992 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
993 | struct trace_event *event) | |
f633cef0 | 994 | { |
2c9b238e | 995 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
996 | } |
997 | ||
998 | ||
2c9b238e | 999 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
1000 | { |
1001 | struct ctx_switch_entry *field; | |
2c9b238e | 1002 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1003 | int T; |
1004 | ||
2c9b238e | 1005 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1006 | |
1007 | if (!S) | |
b0f56f1a | 1008 | S = task_state_char(field->prev_state); |
f633cef0 SR |
1009 | T = task_state_char(field->next_state); |
1010 | ||
1011 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
1012 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
1013 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
1014 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
1015 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
1016 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
1017 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
1018 | ||
d9793bd8 | 1019 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1020 | } |
1021 | ||
a9a57763 SR |
1022 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1023 | struct trace_event *event) | |
f633cef0 | 1024 | { |
2c9b238e | 1025 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1026 | } |
1027 | ||
a9a57763 SR |
1028 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1029 | struct trace_event *event) | |
f633cef0 | 1030 | { |
2c9b238e | 1031 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1032 | } |
1033 | ||
ae7462b4 | 1034 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1035 | int flags, struct trace_event *event) |
f633cef0 SR |
1036 | { |
1037 | struct ctx_switch_entry *field; | |
2c9b238e | 1038 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1039 | |
2c9b238e | 1040 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1041 | |
1042 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
1043 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
1044 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
1045 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
1046 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
1047 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
1048 | ||
d9793bd8 | 1049 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1050 | } |
1051 | ||
a9a57763 | 1052 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1053 | .trace = trace_ctx_print, |
f633cef0 SR |
1054 | .raw = trace_ctx_raw, |
1055 | .hex = trace_ctx_hex, | |
1056 | .binary = trace_ctxwake_bin, | |
1057 | }; | |
1058 | ||
a9a57763 SR |
1059 | static struct trace_event trace_ctx_event = { |
1060 | .type = TRACE_CTX, | |
1061 | .funcs = &trace_ctx_funcs, | |
1062 | }; | |
1063 | ||
1064 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1065 | .trace = trace_wake_print, |
f633cef0 SR |
1066 | .raw = trace_wake_raw, |
1067 | .hex = trace_wake_hex, | |
1068 | .binary = trace_ctxwake_bin, | |
1069 | }; | |
1070 | ||
a9a57763 SR |
1071 | static struct trace_event trace_wake_event = { |
1072 | .type = TRACE_WAKE, | |
1073 | .funcs = &trace_wake_funcs, | |
1074 | }; | |
1075 | ||
f633cef0 SR |
1076 | /* TRACE_STACK */ |
1077 | ||
ae7462b4 | 1078 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1079 | int flags, struct trace_event *event) |
f633cef0 SR |
1080 | { |
1081 | struct stack_entry *field; | |
2c9b238e | 1082 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1083 | int i; |
1084 | ||
2c9b238e | 1085 | trace_assign_type(field, iter->ent); |
f633cef0 | 1086 | |
563af16c | 1087 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1088 | goto partial; |
f633cef0 | 1089 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { |
f11b3f4e | 1090 | if (!field->caller[i] || (field->caller[i] == ULONG_MAX)) |
1ec7c484 | 1091 | break; |
f11b3f4e | 1092 | if (!trace_seq_puts(s, " => ")) |
1093 | goto partial; | |
f633cef0 | 1094 | |
f11b3f4e | 1095 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
1096 | goto partial; | |
6c1a99af | 1097 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
1098 | goto partial; |
1099 | } | |
1100 | ||
d9793bd8 | 1101 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1102 | |
1103 | partial: | |
1104 | return TRACE_TYPE_PARTIAL_LINE; | |
1105 | } | |
1106 | ||
a9a57763 | 1107 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1108 | .trace = trace_stack_print, |
f633cef0 SR |
1109 | }; |
1110 | ||
a9a57763 SR |
1111 | static struct trace_event trace_stack_event = { |
1112 | .type = TRACE_STACK, | |
1113 | .funcs = &trace_stack_funcs, | |
1114 | }; | |
1115 | ||
f633cef0 | 1116 | /* TRACE_USER_STACK */ |
ae7462b4 | 1117 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1118 | int flags, struct trace_event *event) |
f633cef0 SR |
1119 | { |
1120 | struct userstack_entry *field; | |
2c9b238e | 1121 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1122 | |
2c9b238e | 1123 | trace_assign_type(field, iter->ent); |
f633cef0 | 1124 | |
563af16c | 1125 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1126 | goto partial; |
1127 | ||
048dc50c | 1128 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1129 | goto partial; |
1130 | ||
d9793bd8 | 1131 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1132 | |
1133 | partial: | |
1134 | return TRACE_TYPE_PARTIAL_LINE; | |
1135 | } | |
1136 | ||
a9a57763 | 1137 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1138 | .trace = trace_user_stack_print, |
f633cef0 SR |
1139 | }; |
1140 | ||
a9a57763 SR |
1141 | static struct trace_event trace_user_stack_event = { |
1142 | .type = TRACE_USER_STACK, | |
1143 | .funcs = &trace_user_stack_funcs, | |
1144 | }; | |
1145 | ||
48ead020 | 1146 | /* TRACE_BPRINT */ |
1427cdf0 | 1147 | static enum print_line_t |
a9a57763 SR |
1148 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1149 | struct trace_event *event) | |
1427cdf0 LJ |
1150 | { |
1151 | struct trace_entry *entry = iter->ent; | |
1152 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1153 | struct bprint_entry *field; |
1427cdf0 LJ |
1154 | |
1155 | trace_assign_type(field, entry); | |
1156 | ||
1157 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1158 | goto partial; | |
1159 | ||
1160 | if (!trace_seq_puts(s, ": ")) | |
1161 | goto partial; | |
1162 | ||
1163 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1164 | goto partial; | |
1165 | ||
1166 | return TRACE_TYPE_HANDLED; | |
1167 | ||
1168 | partial: | |
1169 | return TRACE_TYPE_PARTIAL_LINE; | |
1170 | } | |
1171 | ||
769b0441 | 1172 | |
48ead020 | 1173 | static enum print_line_t |
a9a57763 SR |
1174 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1175 | struct trace_event *event) | |
1427cdf0 | 1176 | { |
48ead020 | 1177 | struct bprint_entry *field; |
1427cdf0 | 1178 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1179 | |
769b0441 | 1180 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1181 | |
1182 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1183 | goto partial; | |
1184 | ||
1185 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1186 | goto partial; | |
1187 | ||
1188 | return TRACE_TYPE_HANDLED; | |
1189 | ||
1190 | partial: | |
1191 | return TRACE_TYPE_PARTIAL_LINE; | |
1192 | } | |
1193 | ||
a9a57763 SR |
1194 | static struct trace_event_functions trace_bprint_funcs = { |
1195 | .trace = trace_bprint_print, | |
1196 | .raw = trace_bprint_raw, | |
1197 | }; | |
769b0441 | 1198 | |
48ead020 FW |
1199 | static struct trace_event trace_bprint_event = { |
1200 | .type = TRACE_BPRINT, | |
a9a57763 | 1201 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1202 | }; |
1203 | ||
1204 | /* TRACE_PRINT */ | |
1205 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1206 | int flags, struct trace_event *event) |
48ead020 FW |
1207 | { |
1208 | struct print_entry *field; | |
1209 | struct trace_seq *s = &iter->seq; | |
1210 | ||
1211 | trace_assign_type(field, iter->ent); | |
1212 | ||
1213 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1214 | goto partial; | |
1215 | ||
1216 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1217 | goto partial; | |
1218 | ||
1219 | return TRACE_TYPE_HANDLED; | |
1220 | ||
1221 | partial: | |
1222 | return TRACE_TYPE_PARTIAL_LINE; | |
1223 | } | |
1224 | ||
a9a57763 SR |
1225 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1226 | struct trace_event *event) | |
48ead020 FW |
1227 | { |
1228 | struct print_entry *field; | |
1229 | ||
1230 | trace_assign_type(field, iter->ent); | |
1231 | ||
1232 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1233 | goto partial; | |
1234 | ||
1235 | return TRACE_TYPE_HANDLED; | |
1236 | ||
1237 | partial: | |
1238 | return TRACE_TYPE_PARTIAL_LINE; | |
1239 | } | |
1240 | ||
a9a57763 | 1241 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1242 | .trace = trace_print_print, |
1243 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1244 | }; |
1245 | ||
a9a57763 SR |
1246 | static struct trace_event trace_print_event = { |
1247 | .type = TRACE_PRINT, | |
1248 | .funcs = &trace_print_funcs, | |
1249 | }; | |
1250 | ||
48ead020 | 1251 | |
f633cef0 SR |
1252 | static struct trace_event *events[] __initdata = { |
1253 | &trace_fn_event, | |
1254 | &trace_ctx_event, | |
1255 | &trace_wake_event, | |
f633cef0 SR |
1256 | &trace_stack_event, |
1257 | &trace_user_stack_event, | |
48ead020 | 1258 | &trace_bprint_event, |
f633cef0 SR |
1259 | &trace_print_event, |
1260 | NULL | |
1261 | }; | |
1262 | ||
1263 | __init static int init_events(void) | |
1264 | { | |
1265 | struct trace_event *event; | |
1266 | int i, ret; | |
1267 | ||
1268 | for (i = 0; events[i]; i++) { | |
1269 | event = events[i]; | |
1270 | ||
1271 | ret = register_ftrace_event(event); | |
1272 | if (!ret) { | |
1273 | printk(KERN_WARNING "event %d failed to register\n", | |
1274 | event->type); | |
1275 | WARN_ON_ONCE(1); | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | device_initcall(init_events); |