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Commit | Line | Data |
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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 SR |
18 | |
19 | DEFINE_PER_CPU(struct trace_seq, ftrace_event_seq); | |
ec081ddc | 20 | EXPORT_PER_CPU_SYMBOL(ftrace_event_seq); |
be74b73a | 21 | |
f0868d1e SR |
22 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; |
23 | ||
24 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
25 | ||
a63ce5b3 | 26 | int trace_print_seq(struct seq_file *m, struct trace_seq *s) |
0706f1c4 SR |
27 | { |
28 | int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len; | |
a63ce5b3 SR |
29 | int ret; |
30 | ||
31 | ret = seq_write(m, s->buffer, len); | |
0706f1c4 | 32 | |
a63ce5b3 SR |
33 | /* |
34 | * Only reset this buffer if we successfully wrote to the | |
35 | * seq_file buffer. | |
36 | */ | |
37 | if (!ret) | |
38 | trace_seq_init(s); | |
0706f1c4 | 39 | |
a63ce5b3 | 40 | return ret; |
0706f1c4 SR |
41 | } |
42 | ||
5ef841f6 SR |
43 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
44 | { | |
45 | struct trace_seq *s = &iter->seq; | |
46 | struct trace_entry *entry = iter->ent; | |
47 | struct bprint_entry *field; | |
48 | int ret; | |
49 | ||
50 | trace_assign_type(field, entry); | |
51 | ||
52 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
53 | if (!ret) | |
54 | return TRACE_TYPE_PARTIAL_LINE; | |
55 | ||
56 | return TRACE_TYPE_HANDLED; | |
57 | } | |
58 | ||
59 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
60 | { | |
61 | struct trace_seq *s = &iter->seq; | |
62 | struct trace_entry *entry = iter->ent; | |
63 | struct print_entry *field; | |
64 | int ret; | |
65 | ||
66 | trace_assign_type(field, entry); | |
67 | ||
68 | ret = trace_seq_printf(s, "%s", field->buf); | |
69 | if (!ret) | |
70 | return TRACE_TYPE_PARTIAL_LINE; | |
71 | ||
72 | return TRACE_TYPE_HANDLED; | |
73 | } | |
74 | ||
f0868d1e SR |
75 | /** |
76 | * trace_seq_printf - sequence printing of trace information | |
77 | * @s: trace sequence descriptor | |
78 | * @fmt: printf format string | |
79 | * | |
3e69533b JO |
80 | * It returns 0 if the trace oversizes the buffer's free |
81 | * space, 1 otherwise. | |
82 | * | |
f0868d1e SR |
83 | * The tracer may use either sequence operations or its own |
84 | * copy to user routines. To simplify formating of a trace | |
85 | * trace_seq_printf is used to store strings into a special | |
86 | * buffer (@s). Then the output may be either used by | |
87 | * the sequencer or pulled into another buffer. | |
88 | */ | |
89 | int | |
90 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
91 | { | |
92 | int len = (PAGE_SIZE - 1) - s->len; | |
93 | va_list ap; | |
94 | int ret; | |
95 | ||
d184b31c | 96 | if (s->full || !len) |
f0868d1e SR |
97 | return 0; |
98 | ||
99 | va_start(ap, fmt); | |
100 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
101 | va_end(ap); | |
102 | ||
103 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
104 | if (ret >= len) { |
105 | s->full = 1; | |
f0868d1e | 106 | return 0; |
d184b31c | 107 | } |
f0868d1e SR |
108 | |
109 | s->len += ret; | |
110 | ||
3e69533b | 111 | return 1; |
f0868d1e | 112 | } |
17c873ec | 113 | EXPORT_SYMBOL_GPL(trace_seq_printf); |
f0868d1e | 114 | |
725c624a SR |
115 | /** |
116 | * trace_seq_vprintf - sequence printing of trace information | |
117 | * @s: trace sequence descriptor | |
118 | * @fmt: printf format string | |
119 | * | |
120 | * The tracer may use either sequence operations or its own | |
121 | * copy to user routines. To simplify formating of a trace | |
122 | * trace_seq_printf is used to store strings into a special | |
123 | * buffer (@s). Then the output may be either used by | |
124 | * the sequencer or pulled into another buffer. | |
125 | */ | |
126 | int | |
127 | trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) | |
128 | { | |
129 | int len = (PAGE_SIZE - 1) - s->len; | |
130 | int ret; | |
131 | ||
d184b31c | 132 | if (s->full || !len) |
725c624a SR |
133 | return 0; |
134 | ||
135 | ret = vsnprintf(s->buffer + s->len, len, fmt, args); | |
136 | ||
137 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
138 | if (ret >= len) { |
139 | s->full = 1; | |
725c624a | 140 | return 0; |
d184b31c | 141 | } |
725c624a SR |
142 | |
143 | s->len += ret; | |
144 | ||
145 | return len; | |
146 | } | |
147 | EXPORT_SYMBOL_GPL(trace_seq_vprintf); | |
148 | ||
769b0441 | 149 | int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
1427cdf0 LJ |
150 | { |
151 | int len = (PAGE_SIZE - 1) - s->len; | |
152 | int ret; | |
153 | ||
d184b31c | 154 | if (s->full || !len) |
1427cdf0 LJ |
155 | return 0; |
156 | ||
157 | ret = bstr_printf(s->buffer + s->len, len, fmt, binary); | |
158 | ||
159 | /* If we can't write it all, don't bother writing anything */ | |
d184b31c JB |
160 | if (ret >= len) { |
161 | s->full = 1; | |
1427cdf0 | 162 | return 0; |
d184b31c | 163 | } |
1427cdf0 LJ |
164 | |
165 | s->len += ret; | |
166 | ||
167 | return len; | |
168 | } | |
169 | ||
f0868d1e SR |
170 | /** |
171 | * trace_seq_puts - trace sequence printing of simple string | |
172 | * @s: trace sequence descriptor | |
173 | * @str: simple string to record | |
174 | * | |
175 | * The tracer may use either the sequence operations or its own | |
176 | * copy to user routines. This function records a simple string | |
177 | * into a special buffer (@s) for later retrieval by a sequencer | |
178 | * or other mechanism. | |
179 | */ | |
180 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
181 | { | |
182 | int len = strlen(str); | |
183 | ||
d184b31c | 184 | if (s->full) |
f0868d1e SR |
185 | return 0; |
186 | ||
d184b31c JB |
187 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
188 | s->full = 1; | |
189 | return 0; | |
190 | } | |
191 | ||
f0868d1e SR |
192 | memcpy(s->buffer + s->len, str, len); |
193 | s->len += len; | |
194 | ||
195 | return len; | |
196 | } | |
197 | ||
198 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
199 | { | |
d184b31c | 200 | if (s->full) |
f0868d1e SR |
201 | return 0; |
202 | ||
d184b31c JB |
203 | if (s->len >= (PAGE_SIZE - 1)) { |
204 | s->full = 1; | |
205 | return 0; | |
206 | } | |
207 | ||
f0868d1e SR |
208 | s->buffer[s->len++] = c; |
209 | ||
210 | return 1; | |
211 | } | |
bf816235 | 212 | EXPORT_SYMBOL(trace_seq_putc); |
f0868d1e | 213 | |
b14b70a6 | 214 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e | 215 | { |
d184b31c | 216 | if (s->full) |
f0868d1e SR |
217 | return 0; |
218 | ||
d184b31c JB |
219 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
220 | s->full = 1; | |
221 | return 0; | |
222 | } | |
223 | ||
f0868d1e SR |
224 | memcpy(s->buffer + s->len, mem, len); |
225 | s->len += len; | |
226 | ||
227 | return len; | |
228 | } | |
229 | ||
b14b70a6 | 230 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
231 | { |
232 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 233 | const unsigned char *data = mem; |
f0868d1e SR |
234 | int i, j; |
235 | ||
d184b31c JB |
236 | if (s->full) |
237 | return 0; | |
238 | ||
f0868d1e SR |
239 | #ifdef __BIG_ENDIAN |
240 | for (i = 0, j = 0; i < len; i++) { | |
241 | #else | |
242 | for (i = len-1, j = 0; i >= 0; i--) { | |
243 | #endif | |
244 | hex[j++] = hex_asc_hi(data[i]); | |
245 | hex[j++] = hex_asc_lo(data[i]); | |
246 | } | |
247 | hex[j++] = ' '; | |
248 | ||
249 | return trace_seq_putmem(s, hex, j); | |
250 | } | |
251 | ||
bdd6df6a EGM |
252 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
253 | { | |
254 | void *ret; | |
255 | ||
d184b31c | 256 | if (s->full) |
668eb65f | 257 | return NULL; |
d184b31c JB |
258 | |
259 | if (len > ((PAGE_SIZE - 1) - s->len)) { | |
260 | s->full = 1; | |
bdd6df6a | 261 | return NULL; |
d184b31c | 262 | } |
bdd6df6a EGM |
263 | |
264 | ret = s->buffer + s->len; | |
265 | s->len += len; | |
266 | ||
267 | return ret; | |
268 | } | |
269 | ||
f0868d1e SR |
270 | int trace_seq_path(struct trace_seq *s, struct path *path) |
271 | { | |
272 | unsigned char *p; | |
273 | ||
d184b31c | 274 | if (s->full) |
f0868d1e | 275 | return 0; |
d184b31c JB |
276 | |
277 | if (s->len >= (PAGE_SIZE - 1)) { | |
278 | s->full = 1; | |
279 | return 0; | |
280 | } | |
281 | ||
f0868d1e SR |
282 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); |
283 | if (!IS_ERR(p)) { | |
284 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
285 | if (p) { | |
286 | s->len = p - s->buffer; | |
287 | return 1; | |
288 | } | |
289 | } else { | |
290 | s->buffer[s->len++] = '?'; | |
291 | return 1; | |
292 | } | |
293 | ||
d184b31c | 294 | s->full = 1; |
f0868d1e SR |
295 | return 0; |
296 | } | |
297 | ||
be74b73a SR |
298 | const char * |
299 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
300 | unsigned long flags, | |
301 | const struct trace_print_flags *flag_array) | |
302 | { | |
303 | unsigned long mask; | |
304 | const char *str; | |
56d8bd3f | 305 | const char *ret = p->buffer + p->len; |
be74b73a SR |
306 | int i; |
307 | ||
be74b73a SR |
308 | for (i = 0; flag_array[i].name && flags; i++) { |
309 | ||
310 | mask = flag_array[i].mask; | |
311 | if ((flags & mask) != mask) | |
312 | continue; | |
313 | ||
314 | str = flag_array[i].name; | |
315 | flags &= ~mask; | |
316 | if (p->len && delim) | |
317 | trace_seq_puts(p, delim); | |
318 | trace_seq_puts(p, str); | |
319 | } | |
320 | ||
321 | /* check for left over flags */ | |
322 | if (flags) { | |
323 | if (p->len && delim) | |
324 | trace_seq_puts(p, delim); | |
325 | trace_seq_printf(p, "0x%lx", flags); | |
326 | } | |
327 | ||
328 | trace_seq_putc(p, 0); | |
329 | ||
56d8bd3f | 330 | return ret; |
be74b73a | 331 | } |
ec081ddc | 332 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 333 | |
0f4fc29d SR |
334 | const char * |
335 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
336 | const struct trace_print_flags *symbol_array) | |
337 | { | |
338 | int i; | |
56d8bd3f | 339 | const char *ret = p->buffer + p->len; |
0f4fc29d SR |
340 | |
341 | for (i = 0; symbol_array[i].name; i++) { | |
342 | ||
343 | if (val != symbol_array[i].mask) | |
344 | continue; | |
345 | ||
346 | trace_seq_puts(p, symbol_array[i].name); | |
347 | break; | |
348 | } | |
349 | ||
350 | if (!p->len) | |
351 | trace_seq_printf(p, "0x%lx", val); | |
352 | ||
353 | trace_seq_putc(p, 0); | |
354 | ||
56d8bd3f | 355 | return ret; |
0f4fc29d | 356 | } |
ec081ddc | 357 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 358 | |
5a2e3995 KT |
359 | const char * |
360 | ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) | |
361 | { | |
362 | int i; | |
363 | const char *ret = p->buffer + p->len; | |
364 | ||
365 | for (i = 0; i < buf_len; i++) | |
366 | trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]); | |
367 | ||
368 | trace_seq_putc(p, 0); | |
369 | ||
370 | return ret; | |
371 | } | |
372 | EXPORT_SYMBOL(ftrace_print_hex_seq); | |
373 | ||
f0868d1e SR |
374 | #ifdef CONFIG_KRETPROBES |
375 | static inline const char *kretprobed(const char *name) | |
376 | { | |
377 | static const char tramp_name[] = "kretprobe_trampoline"; | |
378 | int size = sizeof(tramp_name); | |
379 | ||
380 | if (strncmp(tramp_name, name, size) == 0) | |
381 | return "[unknown/kretprobe'd]"; | |
382 | return name; | |
383 | } | |
384 | #else | |
385 | static inline const char *kretprobed(const char *name) | |
386 | { | |
387 | return name; | |
388 | } | |
389 | #endif /* CONFIG_KRETPROBES */ | |
390 | ||
391 | static int | |
392 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
393 | { | |
394 | #ifdef CONFIG_KALLSYMS | |
395 | char str[KSYM_SYMBOL_LEN]; | |
396 | const char *name; | |
397 | ||
398 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
399 | ||
400 | name = kretprobed(str); | |
401 | ||
402 | return trace_seq_printf(s, fmt, name); | |
403 | #endif | |
404 | return 1; | |
405 | } | |
406 | ||
407 | static int | |
408 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
409 | unsigned long address) | |
410 | { | |
411 | #ifdef CONFIG_KALLSYMS | |
412 | char str[KSYM_SYMBOL_LEN]; | |
413 | const char *name; | |
414 | ||
415 | sprint_symbol(str, address); | |
416 | name = kretprobed(str); | |
417 | ||
418 | return trace_seq_printf(s, fmt, name); | |
419 | #endif | |
420 | return 1; | |
421 | } | |
422 | ||
423 | #ifndef CONFIG_64BIT | |
424 | # define IP_FMT "%08lx" | |
425 | #else | |
426 | # define IP_FMT "%016lx" | |
427 | #endif | |
428 | ||
429 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
430 | unsigned long ip, unsigned long sym_flags) | |
431 | { | |
432 | struct file *file = NULL; | |
433 | unsigned long vmstart = 0; | |
434 | int ret = 1; | |
435 | ||
d184b31c JB |
436 | if (s->full) |
437 | return 0; | |
438 | ||
f0868d1e SR |
439 | if (mm) { |
440 | const struct vm_area_struct *vma; | |
441 | ||
442 | down_read(&mm->mmap_sem); | |
443 | vma = find_vma(mm, ip); | |
444 | if (vma) { | |
445 | file = vma->vm_file; | |
446 | vmstart = vma->vm_start; | |
447 | } | |
448 | if (file) { | |
449 | ret = trace_seq_path(s, &file->f_path); | |
450 | if (ret) | |
451 | ret = trace_seq_printf(s, "[+0x%lx]", | |
452 | ip - vmstart); | |
453 | } | |
454 | up_read(&mm->mmap_sem); | |
455 | } | |
456 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
457 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
458 | return ret; | |
459 | } | |
460 | ||
461 | int | |
462 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
463 | unsigned long sym_flags) | |
464 | { | |
465 | struct mm_struct *mm = NULL; | |
466 | int ret = 1; | |
467 | unsigned int i; | |
468 | ||
469 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
470 | struct task_struct *task; | |
471 | /* | |
472 | * we do the lookup on the thread group leader, | |
473 | * since individual threads might have already quit! | |
474 | */ | |
475 | rcu_read_lock(); | |
48659d31 | 476 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
477 | if (task) |
478 | mm = get_task_mm(task); | |
479 | rcu_read_unlock(); | |
480 | } | |
481 | ||
482 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
483 | unsigned long ip = entry->caller[i]; | |
484 | ||
485 | if (ip == ULONG_MAX || !ret) | |
486 | break; | |
048dc50c | 487 | if (ret) |
488 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
489 | if (!ip) { |
490 | if (ret) | |
491 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 492 | if (ret) |
493 | ret = trace_seq_puts(s, "\n"); | |
f0868d1e SR |
494 | continue; |
495 | } | |
496 | if (!ret) | |
497 | break; | |
498 | if (ret) | |
499 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
048dc50c | 500 | ret = trace_seq_puts(s, "\n"); |
f0868d1e SR |
501 | } |
502 | ||
503 | if (mm) | |
504 | mmput(mm); | |
505 | return ret; | |
506 | } | |
507 | ||
508 | int | |
509 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
510 | { | |
511 | int ret; | |
512 | ||
513 | if (!ip) | |
514 | return trace_seq_printf(s, "0"); | |
515 | ||
516 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
517 | ret = seq_print_sym_offset(s, "%s", ip); | |
518 | else | |
519 | ret = seq_print_sym_short(s, "%s", ip); | |
520 | ||
521 | if (!ret) | |
522 | return 0; | |
523 | ||
524 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
525 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
526 | return ret; | |
527 | } | |
528 | ||
f81c972d SR |
529 | /** |
530 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
531 | * @s: trace seq struct to write to | |
532 | * @entry: The trace entry field from the ring buffer | |
533 | * | |
534 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
535 | * count and lock depth. | |
536 | */ | |
537 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be FW |
538 | { |
539 | int hardirq, softirq; | |
637e7e86 | 540 | int ret; |
c4a8e8be | 541 | |
c4a8e8be FW |
542 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
543 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 544 | |
f81c972d | 545 | if (!trace_seq_printf(s, "%c%c%c", |
d9793bd8 ACM |
546 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : |
547 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? | |
548 | 'X' : '.', | |
549 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? | |
550 | 'N' : '.', | |
551 | (hardirq && softirq) ? 'H' : | |
552 | hardirq ? 'h' : softirq ? 's' : '.')) | |
553 | return 0; | |
c4a8e8be | 554 | |
829b876d SR |
555 | if (entry->preempt_count) |
556 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 557 | else |
829b876d SR |
558 | ret = trace_seq_putc(s, '.'); |
559 | ||
637e7e86 SR |
560 | if (!ret) |
561 | return 0; | |
562 | ||
829b876d SR |
563 | if (entry->lock_depth < 0) |
564 | return trace_seq_putc(s, '.'); | |
565 | ||
566 | return trace_seq_printf(s, "%d", entry->lock_depth); | |
c4a8e8be FW |
567 | } |
568 | ||
f81c972d SR |
569 | static int |
570 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
571 | { | |
572 | char comm[TASK_COMM_LEN]; | |
573 | ||
574 | trace_find_cmdline(entry->pid, comm); | |
575 | ||
576 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
577 | comm, entry->pid, cpu)) | |
578 | return 0; | |
579 | ||
580 | return trace_print_lat_fmt(s, entry); | |
581 | } | |
582 | ||
c4a8e8be FW |
583 | static unsigned long preempt_mark_thresh = 100; |
584 | ||
d9793bd8 | 585 | static int |
c4a8e8be FW |
586 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
587 | unsigned long rel_usecs) | |
588 | { | |
d9793bd8 ACM |
589 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
590 | rel_usecs > preempt_mark_thresh ? '!' : | |
591 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
592 | } |
593 | ||
594 | int trace_print_context(struct trace_iterator *iter) | |
595 | { | |
596 | struct trace_seq *s = &iter->seq; | |
597 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
598 | unsigned long long t = ns2usecs(iter->ts); |
599 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
600 | unsigned long secs = (unsigned long)t; | |
4ca53085 SR |
601 | char comm[TASK_COMM_LEN]; |
602 | ||
603 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 604 | |
d9793bd8 | 605 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
1830b52d | 606 | comm, entry->pid, iter->cpu, secs, usec_rem); |
c4a8e8be FW |
607 | } |
608 | ||
609 | int trace_print_lat_context(struct trace_iterator *iter) | |
610 | { | |
611 | u64 next_ts; | |
d9793bd8 | 612 | int ret; |
c4a8e8be FW |
613 | struct trace_seq *s = &iter->seq; |
614 | struct trace_entry *entry = iter->ent, | |
615 | *next_entry = trace_find_next_entry(iter, NULL, | |
616 | &next_ts); | |
617 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
618 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
619 | unsigned long rel_usecs; | |
620 | ||
621 | if (!next_entry) | |
622 | next_ts = iter->ts; | |
623 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
624 | ||
625 | if (verbose) { | |
4ca53085 SR |
626 | char comm[TASK_COMM_LEN]; |
627 | ||
628 | trace_find_cmdline(entry->pid, comm); | |
629 | ||
cf8e3474 | 630 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 631 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 632 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
633 | entry->preempt_count, iter->idx, |
634 | ns2usecs(iter->ts), | |
635 | abs_usecs / USEC_PER_MSEC, | |
636 | abs_usecs % USEC_PER_MSEC, | |
637 | rel_usecs / USEC_PER_MSEC, | |
638 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 639 | } else { |
1830b52d | 640 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
641 | if (ret) |
642 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
643 | } |
644 | ||
d9793bd8 | 645 | return ret; |
c4a8e8be FW |
646 | } |
647 | ||
f633cef0 SR |
648 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
649 | ||
650 | static int task_state_char(unsigned long state) | |
651 | { | |
652 | int bit = state ? __ffs(state) + 1 : 0; | |
653 | ||
654 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
655 | } | |
656 | ||
f0868d1e SR |
657 | /** |
658 | * ftrace_find_event - find a registered event | |
659 | * @type: the type of event to look for | |
660 | * | |
661 | * Returns an event of type @type otherwise NULL | |
4f535968 | 662 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
663 | */ |
664 | struct trace_event *ftrace_find_event(int type) | |
665 | { | |
666 | struct trace_event *event; | |
667 | struct hlist_node *n; | |
668 | unsigned key; | |
669 | ||
670 | key = type & (EVENT_HASHSIZE - 1); | |
671 | ||
4f535968 | 672 | hlist_for_each_entry(event, n, &event_hash[key], node) { |
f0868d1e SR |
673 | if (event->type == type) |
674 | return event; | |
675 | } | |
676 | ||
677 | return NULL; | |
678 | } | |
679 | ||
060fa5c8 SR |
680 | static LIST_HEAD(ftrace_event_list); |
681 | ||
682 | static int trace_search_list(struct list_head **list) | |
683 | { | |
684 | struct trace_event *e; | |
685 | int last = __TRACE_LAST_TYPE; | |
686 | ||
687 | if (list_empty(&ftrace_event_list)) { | |
688 | *list = &ftrace_event_list; | |
689 | return last + 1; | |
690 | } | |
691 | ||
692 | /* | |
693 | * We used up all possible max events, | |
694 | * lets see if somebody freed one. | |
695 | */ | |
696 | list_for_each_entry(e, &ftrace_event_list, list) { | |
697 | if (e->type != last + 1) | |
698 | break; | |
699 | last++; | |
700 | } | |
701 | ||
702 | /* Did we used up all 65 thousand events??? */ | |
703 | if ((last + 1) > FTRACE_MAX_EVENT) | |
704 | return 0; | |
705 | ||
706 | *list = &e->list; | |
707 | return last + 1; | |
708 | } | |
709 | ||
4f535968 LJ |
710 | void trace_event_read_lock(void) |
711 | { | |
712 | down_read(&trace_event_mutex); | |
713 | } | |
714 | ||
715 | void trace_event_read_unlock(void) | |
716 | { | |
717 | up_read(&trace_event_mutex); | |
718 | } | |
719 | ||
f0868d1e SR |
720 | /** |
721 | * register_ftrace_event - register output for an event type | |
722 | * @event: the event type to register | |
723 | * | |
724 | * Event types are stored in a hash and this hash is used to | |
725 | * find a way to print an event. If the @event->type is set | |
726 | * then it will use that type, otherwise it will assign a | |
727 | * type to use. | |
728 | * | |
729 | * If you assign your own type, please make sure it is added | |
730 | * to the trace_type enum in trace.h, to avoid collisions | |
731 | * with the dynamic types. | |
732 | * | |
733 | * Returns the event type number or zero on error. | |
734 | */ | |
735 | int register_ftrace_event(struct trace_event *event) | |
736 | { | |
737 | unsigned key; | |
738 | int ret = 0; | |
739 | ||
4f535968 | 740 | down_write(&trace_event_mutex); |
f0868d1e | 741 | |
060fa5c8 | 742 | if (WARN_ON(!event)) |
28bea271 | 743 | goto out; |
28bea271 | 744 | |
a9a57763 SR |
745 | if (WARN_ON(!event->funcs)) |
746 | goto out; | |
747 | ||
060fa5c8 SR |
748 | INIT_LIST_HEAD(&event->list); |
749 | ||
750 | if (!event->type) { | |
48dd0fed | 751 | struct list_head *list = NULL; |
060fa5c8 SR |
752 | |
753 | if (next_event_type > FTRACE_MAX_EVENT) { | |
754 | ||
755 | event->type = trace_search_list(&list); | |
756 | if (!event->type) | |
757 | goto out; | |
758 | ||
759 | } else { | |
760 | ||
761 | event->type = next_event_type++; | |
762 | list = &ftrace_event_list; | |
763 | } | |
764 | ||
765 | if (WARN_ON(ftrace_find_event(event->type))) | |
766 | goto out; | |
767 | ||
768 | list_add_tail(&event->list, list); | |
769 | ||
770 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
771 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
772 | WARN_ON(1); | |
f0868d1e | 773 | goto out; |
060fa5c8 SR |
774 | } else { |
775 | /* Is this event already used */ | |
776 | if (ftrace_find_event(event->type)) | |
777 | goto out; | |
778 | } | |
f0868d1e | 779 | |
a9a57763 SR |
780 | if (event->funcs->trace == NULL) |
781 | event->funcs->trace = trace_nop_print; | |
782 | if (event->funcs->raw == NULL) | |
783 | event->funcs->raw = trace_nop_print; | |
784 | if (event->funcs->hex == NULL) | |
785 | event->funcs->hex = trace_nop_print; | |
786 | if (event->funcs->binary == NULL) | |
787 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 788 | |
f0868d1e SR |
789 | key = event->type & (EVENT_HASHSIZE - 1); |
790 | ||
4f535968 | 791 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
792 | |
793 | ret = event->type; | |
794 | out: | |
4f535968 | 795 | up_write(&trace_event_mutex); |
f0868d1e SR |
796 | |
797 | return ret; | |
798 | } | |
17c873ec | 799 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 800 | |
110bf2b7 SR |
801 | /* |
802 | * Used by module code with the trace_event_mutex held for write. | |
803 | */ | |
804 | int __unregister_ftrace_event(struct trace_event *event) | |
805 | { | |
806 | hlist_del(&event->node); | |
807 | list_del(&event->list); | |
808 | return 0; | |
809 | } | |
810 | ||
f0868d1e SR |
811 | /** |
812 | * unregister_ftrace_event - remove a no longer used event | |
813 | * @event: the event to remove | |
814 | */ | |
815 | int unregister_ftrace_event(struct trace_event *event) | |
816 | { | |
4f535968 | 817 | down_write(&trace_event_mutex); |
110bf2b7 | 818 | __unregister_ftrace_event(event); |
4f535968 | 819 | up_write(&trace_event_mutex); |
f0868d1e SR |
820 | |
821 | return 0; | |
822 | } | |
17c873ec | 823 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
824 | |
825 | /* | |
826 | * Standard events | |
827 | */ | |
828 | ||
a9a57763 SR |
829 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
830 | struct trace_event *event) | |
f633cef0 | 831 | { |
d9793bd8 | 832 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
833 | } |
834 | ||
835 | /* TRACE_FN */ | |
a9a57763 SR |
836 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
837 | struct trace_event *event) | |
f633cef0 SR |
838 | { |
839 | struct ftrace_entry *field; | |
2c9b238e | 840 | struct trace_seq *s = &iter->seq; |
f633cef0 | 841 | |
2c9b238e | 842 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
843 | |
844 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
845 | goto partial; | |
846 | ||
847 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
848 | if (!trace_seq_printf(s, " <-")) | |
849 | goto partial; | |
850 | if (!seq_print_ip_sym(s, | |
851 | field->parent_ip, | |
852 | flags)) | |
853 | goto partial; | |
854 | } | |
855 | if (!trace_seq_printf(s, "\n")) | |
856 | goto partial; | |
857 | ||
d9793bd8 | 858 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
859 | |
860 | partial: | |
861 | return TRACE_TYPE_PARTIAL_LINE; | |
862 | } | |
863 | ||
a9a57763 SR |
864 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
865 | struct trace_event *event) | |
f633cef0 SR |
866 | { |
867 | struct ftrace_entry *field; | |
868 | ||
2c9b238e | 869 | trace_assign_type(field, iter->ent); |
f633cef0 | 870 | |
2c9b238e | 871 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
872 | field->ip, |
873 | field->parent_ip)) | |
f633cef0 SR |
874 | return TRACE_TYPE_PARTIAL_LINE; |
875 | ||
d9793bd8 | 876 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
877 | } |
878 | ||
a9a57763 SR |
879 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
880 | struct trace_event *event) | |
f633cef0 SR |
881 | { |
882 | struct ftrace_entry *field; | |
2c9b238e | 883 | struct trace_seq *s = &iter->seq; |
f633cef0 | 884 | |
2c9b238e | 885 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
886 | |
887 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
888 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
889 | ||
d9793bd8 | 890 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
891 | } |
892 | ||
a9a57763 SR |
893 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
894 | struct trace_event *event) | |
f633cef0 SR |
895 | { |
896 | struct ftrace_entry *field; | |
2c9b238e | 897 | struct trace_seq *s = &iter->seq; |
f633cef0 | 898 | |
2c9b238e | 899 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
900 | |
901 | SEQ_PUT_FIELD_RET(s, field->ip); | |
902 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
903 | ||
d9793bd8 | 904 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
905 | } |
906 | ||
a9a57763 | 907 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 908 | .trace = trace_fn_trace, |
f633cef0 SR |
909 | .raw = trace_fn_raw, |
910 | .hex = trace_fn_hex, | |
911 | .binary = trace_fn_bin, | |
912 | }; | |
913 | ||
a9a57763 SR |
914 | static struct trace_event trace_fn_event = { |
915 | .type = TRACE_FN, | |
916 | .funcs = &trace_fn_funcs, | |
917 | }; | |
918 | ||
f633cef0 | 919 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
920 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
921 | char *delim) | |
f633cef0 SR |
922 | { |
923 | struct ctx_switch_entry *field; | |
4ca53085 | 924 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
925 | int S, T; |
926 | ||
4ca53085 | 927 | |
2c9b238e | 928 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
929 | |
930 | T = task_state_char(field->next_state); | |
931 | S = task_state_char(field->prev_state); | |
4ca53085 | 932 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
933 | if (!trace_seq_printf(&iter->seq, |
934 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
935 | field->prev_pid, |
936 | field->prev_prio, | |
937 | S, delim, | |
938 | field->next_cpu, | |
939 | field->next_pid, | |
940 | field->next_prio, | |
941 | T, comm)) | |
f633cef0 SR |
942 | return TRACE_TYPE_PARTIAL_LINE; |
943 | ||
d9793bd8 | 944 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
945 | } |
946 | ||
a9a57763 SR |
947 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
948 | struct trace_event *event) | |
f633cef0 | 949 | { |
2c9b238e | 950 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
951 | } |
952 | ||
ae7462b4 | 953 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 954 | int flags, struct trace_event *event) |
f633cef0 | 955 | { |
2c9b238e | 956 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
957 | } |
958 | ||
2c9b238e | 959 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
960 | { |
961 | struct ctx_switch_entry *field; | |
962 | int T; | |
963 | ||
2c9b238e | 964 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
965 | |
966 | if (!S) | |
b0f56f1a | 967 | S = task_state_char(field->prev_state); |
f633cef0 | 968 | T = task_state_char(field->next_state); |
2c9b238e | 969 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
970 | field->prev_pid, |
971 | field->prev_prio, | |
972 | S, | |
973 | field->next_cpu, | |
974 | field->next_pid, | |
975 | field->next_prio, | |
976 | T)) | |
f633cef0 SR |
977 | return TRACE_TYPE_PARTIAL_LINE; |
978 | ||
d9793bd8 | 979 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
980 | } |
981 | ||
a9a57763 SR |
982 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
983 | struct trace_event *event) | |
f633cef0 | 984 | { |
2c9b238e | 985 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
986 | } |
987 | ||
a9a57763 SR |
988 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
989 | struct trace_event *event) | |
f633cef0 | 990 | { |
2c9b238e | 991 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
992 | } |
993 | ||
994 | ||
2c9b238e | 995 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
996 | { |
997 | struct ctx_switch_entry *field; | |
2c9b238e | 998 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
999 | int T; |
1000 | ||
2c9b238e | 1001 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1002 | |
1003 | if (!S) | |
b0f56f1a | 1004 | S = task_state_char(field->prev_state); |
f633cef0 SR |
1005 | T = task_state_char(field->next_state); |
1006 | ||
1007 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
1008 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
1009 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
1010 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
1011 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
1012 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
1013 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
1014 | ||
d9793bd8 | 1015 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1016 | } |
1017 | ||
a9a57763 SR |
1018 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1019 | struct trace_event *event) | |
f633cef0 | 1020 | { |
2c9b238e | 1021 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1022 | } |
1023 | ||
a9a57763 SR |
1024 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1025 | struct trace_event *event) | |
f633cef0 | 1026 | { |
2c9b238e | 1027 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1028 | } |
1029 | ||
ae7462b4 | 1030 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1031 | int flags, struct trace_event *event) |
f633cef0 SR |
1032 | { |
1033 | struct ctx_switch_entry *field; | |
2c9b238e | 1034 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1035 | |
2c9b238e | 1036 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1037 | |
1038 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
1039 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
1040 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
1041 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
1042 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
1043 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
1044 | ||
d9793bd8 | 1045 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1046 | } |
1047 | ||
a9a57763 | 1048 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1049 | .trace = trace_ctx_print, |
f633cef0 SR |
1050 | .raw = trace_ctx_raw, |
1051 | .hex = trace_ctx_hex, | |
1052 | .binary = trace_ctxwake_bin, | |
1053 | }; | |
1054 | ||
a9a57763 SR |
1055 | static struct trace_event trace_ctx_event = { |
1056 | .type = TRACE_CTX, | |
1057 | .funcs = &trace_ctx_funcs, | |
1058 | }; | |
1059 | ||
1060 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1061 | .trace = trace_wake_print, |
f633cef0 SR |
1062 | .raw = trace_wake_raw, |
1063 | .hex = trace_wake_hex, | |
1064 | .binary = trace_ctxwake_bin, | |
1065 | }; | |
1066 | ||
a9a57763 SR |
1067 | static struct trace_event trace_wake_event = { |
1068 | .type = TRACE_WAKE, | |
1069 | .funcs = &trace_wake_funcs, | |
1070 | }; | |
1071 | ||
f633cef0 | 1072 | /* TRACE_SPECIAL */ |
ae7462b4 | 1073 | static enum print_line_t trace_special_print(struct trace_iterator *iter, |
a9a57763 | 1074 | int flags, struct trace_event *event) |
f633cef0 SR |
1075 | { |
1076 | struct special_entry *field; | |
1077 | ||
2c9b238e | 1078 | trace_assign_type(field, iter->ent); |
f633cef0 | 1079 | |
2c9b238e | 1080 | if (!trace_seq_printf(&iter->seq, "# %ld %ld %ld\n", |
6c1a99af LJ |
1081 | field->arg1, |
1082 | field->arg2, | |
1083 | field->arg3)) | |
f633cef0 SR |
1084 | return TRACE_TYPE_PARTIAL_LINE; |
1085 | ||
d9793bd8 | 1086 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1087 | } |
1088 | ||
ae7462b4 | 1089 | static enum print_line_t trace_special_hex(struct trace_iterator *iter, |
a9a57763 | 1090 | int flags, struct trace_event *event) |
f633cef0 SR |
1091 | { |
1092 | struct special_entry *field; | |
2c9b238e | 1093 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1094 | |
2c9b238e | 1095 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1096 | |
1097 | SEQ_PUT_HEX_FIELD_RET(s, field->arg1); | |
1098 | SEQ_PUT_HEX_FIELD_RET(s, field->arg2); | |
1099 | SEQ_PUT_HEX_FIELD_RET(s, field->arg3); | |
1100 | ||
d9793bd8 | 1101 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1102 | } |
1103 | ||
ae7462b4 | 1104 | static enum print_line_t trace_special_bin(struct trace_iterator *iter, |
a9a57763 | 1105 | int flags, struct trace_event *event) |
f633cef0 SR |
1106 | { |
1107 | struct special_entry *field; | |
2c9b238e | 1108 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1109 | |
2c9b238e | 1110 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1111 | |
1112 | SEQ_PUT_FIELD_RET(s, field->arg1); | |
1113 | SEQ_PUT_FIELD_RET(s, field->arg2); | |
1114 | SEQ_PUT_FIELD_RET(s, field->arg3); | |
1115 | ||
d9793bd8 | 1116 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1117 | } |
1118 | ||
a9a57763 | 1119 | static struct trace_event_functions trace_special_funcs = { |
f633cef0 | 1120 | .trace = trace_special_print, |
f633cef0 SR |
1121 | .raw = trace_special_print, |
1122 | .hex = trace_special_hex, | |
1123 | .binary = trace_special_bin, | |
1124 | }; | |
1125 | ||
a9a57763 SR |
1126 | static struct trace_event trace_special_event = { |
1127 | .type = TRACE_SPECIAL, | |
1128 | .funcs = &trace_special_funcs, | |
1129 | }; | |
1130 | ||
f633cef0 SR |
1131 | /* TRACE_STACK */ |
1132 | ||
ae7462b4 | 1133 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1134 | int flags, struct trace_event *event) |
f633cef0 SR |
1135 | { |
1136 | struct stack_entry *field; | |
2c9b238e | 1137 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1138 | int i; |
1139 | ||
2c9b238e | 1140 | trace_assign_type(field, iter->ent); |
f633cef0 | 1141 | |
563af16c | 1142 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1143 | goto partial; |
f633cef0 | 1144 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { |
f11b3f4e | 1145 | if (!field->caller[i] || (field->caller[i] == ULONG_MAX)) |
1ec7c484 | 1146 | break; |
f11b3f4e | 1147 | if (!trace_seq_puts(s, " => ")) |
1148 | goto partial; | |
f633cef0 | 1149 | |
f11b3f4e | 1150 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
1151 | goto partial; | |
6c1a99af | 1152 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
1153 | goto partial; |
1154 | } | |
1155 | ||
d9793bd8 | 1156 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1157 | |
1158 | partial: | |
1159 | return TRACE_TYPE_PARTIAL_LINE; | |
1160 | } | |
1161 | ||
a9a57763 | 1162 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1163 | .trace = trace_stack_print, |
f633cef0 SR |
1164 | .raw = trace_special_print, |
1165 | .hex = trace_special_hex, | |
1166 | .binary = trace_special_bin, | |
1167 | }; | |
1168 | ||
a9a57763 SR |
1169 | static struct trace_event trace_stack_event = { |
1170 | .type = TRACE_STACK, | |
1171 | .funcs = &trace_stack_funcs, | |
1172 | }; | |
1173 | ||
f633cef0 | 1174 | /* TRACE_USER_STACK */ |
ae7462b4 | 1175 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1176 | int flags, struct trace_event *event) |
f633cef0 SR |
1177 | { |
1178 | struct userstack_entry *field; | |
2c9b238e | 1179 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1180 | |
2c9b238e | 1181 | trace_assign_type(field, iter->ent); |
f633cef0 | 1182 | |
563af16c | 1183 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1184 | goto partial; |
1185 | ||
048dc50c | 1186 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1187 | goto partial; |
1188 | ||
d9793bd8 | 1189 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1190 | |
1191 | partial: | |
1192 | return TRACE_TYPE_PARTIAL_LINE; | |
1193 | } | |
1194 | ||
a9a57763 | 1195 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1196 | .trace = trace_user_stack_print, |
f633cef0 SR |
1197 | .raw = trace_special_print, |
1198 | .hex = trace_special_hex, | |
1199 | .binary = trace_special_bin, | |
1200 | }; | |
1201 | ||
a9a57763 SR |
1202 | static struct trace_event trace_user_stack_event = { |
1203 | .type = TRACE_USER_STACK, | |
1204 | .funcs = &trace_user_stack_funcs, | |
1205 | }; | |
1206 | ||
48ead020 | 1207 | /* TRACE_BPRINT */ |
1427cdf0 | 1208 | static enum print_line_t |
a9a57763 SR |
1209 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1210 | struct trace_event *event) | |
1427cdf0 LJ |
1211 | { |
1212 | struct trace_entry *entry = iter->ent; | |
1213 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1214 | struct bprint_entry *field; |
1427cdf0 LJ |
1215 | |
1216 | trace_assign_type(field, entry); | |
1217 | ||
1218 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1219 | goto partial; | |
1220 | ||
1221 | if (!trace_seq_puts(s, ": ")) | |
1222 | goto partial; | |
1223 | ||
1224 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1225 | goto partial; | |
1226 | ||
1227 | return TRACE_TYPE_HANDLED; | |
1228 | ||
1229 | partial: | |
1230 | return TRACE_TYPE_PARTIAL_LINE; | |
1231 | } | |
1232 | ||
769b0441 | 1233 | |
48ead020 | 1234 | static enum print_line_t |
a9a57763 SR |
1235 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1236 | struct trace_event *event) | |
1427cdf0 | 1237 | { |
48ead020 | 1238 | struct bprint_entry *field; |
1427cdf0 | 1239 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1240 | |
769b0441 | 1241 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1242 | |
1243 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1244 | goto partial; | |
1245 | ||
1246 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1247 | goto partial; | |
1248 | ||
1249 | return TRACE_TYPE_HANDLED; | |
1250 | ||
1251 | partial: | |
1252 | return TRACE_TYPE_PARTIAL_LINE; | |
1253 | } | |
1254 | ||
a9a57763 SR |
1255 | static struct trace_event_functions trace_bprint_funcs = { |
1256 | .trace = trace_bprint_print, | |
1257 | .raw = trace_bprint_raw, | |
1258 | }; | |
769b0441 | 1259 | |
48ead020 FW |
1260 | static struct trace_event trace_bprint_event = { |
1261 | .type = TRACE_BPRINT, | |
a9a57763 | 1262 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1263 | }; |
1264 | ||
1265 | /* TRACE_PRINT */ | |
1266 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1267 | int flags, struct trace_event *event) |
48ead020 FW |
1268 | { |
1269 | struct print_entry *field; | |
1270 | struct trace_seq *s = &iter->seq; | |
1271 | ||
1272 | trace_assign_type(field, iter->ent); | |
1273 | ||
1274 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1275 | goto partial; | |
1276 | ||
1277 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1278 | goto partial; | |
1279 | ||
1280 | return TRACE_TYPE_HANDLED; | |
1281 | ||
1282 | partial: | |
1283 | return TRACE_TYPE_PARTIAL_LINE; | |
1284 | } | |
1285 | ||
a9a57763 SR |
1286 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1287 | struct trace_event *event) | |
48ead020 FW |
1288 | { |
1289 | struct print_entry *field; | |
1290 | ||
1291 | trace_assign_type(field, iter->ent); | |
1292 | ||
1293 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1294 | goto partial; | |
1295 | ||
1296 | return TRACE_TYPE_HANDLED; | |
1297 | ||
1298 | partial: | |
1299 | return TRACE_TYPE_PARTIAL_LINE; | |
1300 | } | |
1301 | ||
a9a57763 | 1302 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1303 | .trace = trace_print_print, |
1304 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1305 | }; |
1306 | ||
a9a57763 SR |
1307 | static struct trace_event trace_print_event = { |
1308 | .type = TRACE_PRINT, | |
1309 | .funcs = &trace_print_funcs, | |
1310 | }; | |
1311 | ||
48ead020 | 1312 | |
f633cef0 SR |
1313 | static struct trace_event *events[] __initdata = { |
1314 | &trace_fn_event, | |
1315 | &trace_ctx_event, | |
1316 | &trace_wake_event, | |
1317 | &trace_special_event, | |
1318 | &trace_stack_event, | |
1319 | &trace_user_stack_event, | |
48ead020 | 1320 | &trace_bprint_event, |
f633cef0 SR |
1321 | &trace_print_event, |
1322 | NULL | |
1323 | }; | |
1324 | ||
1325 | __init static int init_events(void) | |
1326 | { | |
1327 | struct trace_event *event; | |
1328 | int i, ret; | |
1329 | ||
1330 | for (i = 0; events[i]; i++) { | |
1331 | event = events[i]; | |
1332 | ||
1333 | ret = register_ftrace_event(event); | |
1334 | if (!ret) { | |
1335 | printk(KERN_WARNING "event %d failed to register\n", | |
1336 | event->type); | |
1337 | WARN_ON_ONCE(1); | |
1338 | } | |
1339 | } | |
1340 | ||
1341 | return 0; | |
1342 | } | |
1343 | device_initcall(init_events); |