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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 | 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 | |
532 | * count and lock depth. | |
533 | */ | |
534 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be FW |
535 | { |
536 | int hardirq, softirq; | |
637e7e86 | 537 | int ret; |
c4a8e8be | 538 | |
c4a8e8be FW |
539 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
540 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 541 | |
f81c972d | 542 | if (!trace_seq_printf(s, "%c%c%c", |
d9793bd8 ACM |
543 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : |
544 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? | |
545 | 'X' : '.', | |
546 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? | |
547 | 'N' : '.', | |
548 | (hardirq && softirq) ? 'H' : | |
549 | hardirq ? 'h' : softirq ? 's' : '.')) | |
550 | return 0; | |
c4a8e8be | 551 | |
829b876d SR |
552 | if (entry->preempt_count) |
553 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 554 | else |
829b876d SR |
555 | ret = trace_seq_putc(s, '.'); |
556 | ||
637e7e86 SR |
557 | if (!ret) |
558 | return 0; | |
559 | ||
829b876d SR |
560 | if (entry->lock_depth < 0) |
561 | return trace_seq_putc(s, '.'); | |
562 | ||
563 | return trace_seq_printf(s, "%d", entry->lock_depth); | |
c4a8e8be FW |
564 | } |
565 | ||
f81c972d SR |
566 | static int |
567 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
568 | { | |
569 | char comm[TASK_COMM_LEN]; | |
570 | ||
571 | trace_find_cmdline(entry->pid, comm); | |
572 | ||
573 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
574 | comm, entry->pid, cpu)) | |
575 | return 0; | |
576 | ||
577 | return trace_print_lat_fmt(s, entry); | |
578 | } | |
579 | ||
c4a8e8be FW |
580 | static unsigned long preempt_mark_thresh = 100; |
581 | ||
d9793bd8 | 582 | static int |
c4a8e8be FW |
583 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
584 | unsigned long rel_usecs) | |
585 | { | |
d9793bd8 ACM |
586 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
587 | rel_usecs > preempt_mark_thresh ? '!' : | |
588 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
589 | } |
590 | ||
591 | int trace_print_context(struct trace_iterator *iter) | |
592 | { | |
593 | struct trace_seq *s = &iter->seq; | |
594 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
595 | unsigned long long t = ns2usecs(iter->ts); |
596 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
597 | unsigned long secs = (unsigned long)t; | |
4ca53085 SR |
598 | char comm[TASK_COMM_LEN]; |
599 | ||
600 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 601 | |
d9793bd8 | 602 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
1830b52d | 603 | comm, entry->pid, iter->cpu, secs, usec_rem); |
c4a8e8be FW |
604 | } |
605 | ||
606 | int trace_print_lat_context(struct trace_iterator *iter) | |
607 | { | |
608 | u64 next_ts; | |
d9793bd8 | 609 | int ret; |
c4a8e8be FW |
610 | struct trace_seq *s = &iter->seq; |
611 | struct trace_entry *entry = iter->ent, | |
612 | *next_entry = trace_find_next_entry(iter, NULL, | |
613 | &next_ts); | |
614 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
615 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
616 | unsigned long rel_usecs; | |
617 | ||
618 | if (!next_entry) | |
619 | next_ts = iter->ts; | |
620 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
621 | ||
622 | if (verbose) { | |
4ca53085 SR |
623 | char comm[TASK_COMM_LEN]; |
624 | ||
625 | trace_find_cmdline(entry->pid, comm); | |
626 | ||
cf8e3474 | 627 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 628 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 629 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
630 | entry->preempt_count, iter->idx, |
631 | ns2usecs(iter->ts), | |
632 | abs_usecs / USEC_PER_MSEC, | |
633 | abs_usecs % USEC_PER_MSEC, | |
634 | rel_usecs / USEC_PER_MSEC, | |
635 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 636 | } else { |
1830b52d | 637 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
638 | if (ret) |
639 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
640 | } |
641 | ||
d9793bd8 | 642 | return ret; |
c4a8e8be FW |
643 | } |
644 | ||
f633cef0 SR |
645 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
646 | ||
647 | static int task_state_char(unsigned long state) | |
648 | { | |
649 | int bit = state ? __ffs(state) + 1 : 0; | |
650 | ||
651 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
652 | } | |
653 | ||
f0868d1e SR |
654 | /** |
655 | * ftrace_find_event - find a registered event | |
656 | * @type: the type of event to look for | |
657 | * | |
658 | * Returns an event of type @type otherwise NULL | |
4f535968 | 659 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
660 | */ |
661 | struct trace_event *ftrace_find_event(int type) | |
662 | { | |
663 | struct trace_event *event; | |
664 | struct hlist_node *n; | |
665 | unsigned key; | |
666 | ||
667 | key = type & (EVENT_HASHSIZE - 1); | |
668 | ||
4f535968 | 669 | hlist_for_each_entry(event, n, &event_hash[key], node) { |
f0868d1e SR |
670 | if (event->type == type) |
671 | return event; | |
672 | } | |
673 | ||
674 | return NULL; | |
675 | } | |
676 | ||
060fa5c8 SR |
677 | static LIST_HEAD(ftrace_event_list); |
678 | ||
679 | static int trace_search_list(struct list_head **list) | |
680 | { | |
681 | struct trace_event *e; | |
682 | int last = __TRACE_LAST_TYPE; | |
683 | ||
684 | if (list_empty(&ftrace_event_list)) { | |
685 | *list = &ftrace_event_list; | |
686 | return last + 1; | |
687 | } | |
688 | ||
689 | /* | |
690 | * We used up all possible max events, | |
691 | * lets see if somebody freed one. | |
692 | */ | |
693 | list_for_each_entry(e, &ftrace_event_list, list) { | |
694 | if (e->type != last + 1) | |
695 | break; | |
696 | last++; | |
697 | } | |
698 | ||
699 | /* Did we used up all 65 thousand events??? */ | |
700 | if ((last + 1) > FTRACE_MAX_EVENT) | |
701 | return 0; | |
702 | ||
703 | *list = &e->list; | |
704 | return last + 1; | |
705 | } | |
706 | ||
4f535968 LJ |
707 | void trace_event_read_lock(void) |
708 | { | |
709 | down_read(&trace_event_mutex); | |
710 | } | |
711 | ||
712 | void trace_event_read_unlock(void) | |
713 | { | |
714 | up_read(&trace_event_mutex); | |
715 | } | |
716 | ||
f0868d1e SR |
717 | /** |
718 | * register_ftrace_event - register output for an event type | |
719 | * @event: the event type to register | |
720 | * | |
721 | * Event types are stored in a hash and this hash is used to | |
722 | * find a way to print an event. If the @event->type is set | |
723 | * then it will use that type, otherwise it will assign a | |
724 | * type to use. | |
725 | * | |
726 | * If you assign your own type, please make sure it is added | |
727 | * to the trace_type enum in trace.h, to avoid collisions | |
728 | * with the dynamic types. | |
729 | * | |
730 | * Returns the event type number or zero on error. | |
731 | */ | |
732 | int register_ftrace_event(struct trace_event *event) | |
733 | { | |
734 | unsigned key; | |
735 | int ret = 0; | |
736 | ||
4f535968 | 737 | down_write(&trace_event_mutex); |
f0868d1e | 738 | |
060fa5c8 | 739 | if (WARN_ON(!event)) |
28bea271 | 740 | goto out; |
28bea271 | 741 | |
a9a57763 SR |
742 | if (WARN_ON(!event->funcs)) |
743 | goto out; | |
744 | ||
060fa5c8 SR |
745 | INIT_LIST_HEAD(&event->list); |
746 | ||
747 | if (!event->type) { | |
48dd0fed | 748 | struct list_head *list = NULL; |
060fa5c8 SR |
749 | |
750 | if (next_event_type > FTRACE_MAX_EVENT) { | |
751 | ||
752 | event->type = trace_search_list(&list); | |
753 | if (!event->type) | |
754 | goto out; | |
755 | ||
756 | } else { | |
757 | ||
758 | event->type = next_event_type++; | |
759 | list = &ftrace_event_list; | |
760 | } | |
761 | ||
762 | if (WARN_ON(ftrace_find_event(event->type))) | |
763 | goto out; | |
764 | ||
765 | list_add_tail(&event->list, list); | |
766 | ||
767 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
768 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
769 | WARN_ON(1); | |
f0868d1e | 770 | goto out; |
060fa5c8 SR |
771 | } else { |
772 | /* Is this event already used */ | |
773 | if (ftrace_find_event(event->type)) | |
774 | goto out; | |
775 | } | |
f0868d1e | 776 | |
a9a57763 SR |
777 | if (event->funcs->trace == NULL) |
778 | event->funcs->trace = trace_nop_print; | |
779 | if (event->funcs->raw == NULL) | |
780 | event->funcs->raw = trace_nop_print; | |
781 | if (event->funcs->hex == NULL) | |
782 | event->funcs->hex = trace_nop_print; | |
783 | if (event->funcs->binary == NULL) | |
784 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 785 | |
f0868d1e SR |
786 | key = event->type & (EVENT_HASHSIZE - 1); |
787 | ||
4f535968 | 788 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
789 | |
790 | ret = event->type; | |
791 | out: | |
4f535968 | 792 | up_write(&trace_event_mutex); |
f0868d1e SR |
793 | |
794 | return ret; | |
795 | } | |
17c873ec | 796 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 797 | |
110bf2b7 SR |
798 | /* |
799 | * Used by module code with the trace_event_mutex held for write. | |
800 | */ | |
801 | int __unregister_ftrace_event(struct trace_event *event) | |
802 | { | |
803 | hlist_del(&event->node); | |
804 | list_del(&event->list); | |
805 | return 0; | |
806 | } | |
807 | ||
f0868d1e SR |
808 | /** |
809 | * unregister_ftrace_event - remove a no longer used event | |
810 | * @event: the event to remove | |
811 | */ | |
812 | int unregister_ftrace_event(struct trace_event *event) | |
813 | { | |
4f535968 | 814 | down_write(&trace_event_mutex); |
110bf2b7 | 815 | __unregister_ftrace_event(event); |
4f535968 | 816 | up_write(&trace_event_mutex); |
f0868d1e SR |
817 | |
818 | return 0; | |
819 | } | |
17c873ec | 820 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
821 | |
822 | /* | |
823 | * Standard events | |
824 | */ | |
825 | ||
a9a57763 SR |
826 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
827 | struct trace_event *event) | |
f633cef0 | 828 | { |
d9793bd8 | 829 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
830 | } |
831 | ||
832 | /* TRACE_FN */ | |
a9a57763 SR |
833 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
834 | struct trace_event *event) | |
f633cef0 SR |
835 | { |
836 | struct ftrace_entry *field; | |
2c9b238e | 837 | struct trace_seq *s = &iter->seq; |
f633cef0 | 838 | |
2c9b238e | 839 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
840 | |
841 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
842 | goto partial; | |
843 | ||
844 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
845 | if (!trace_seq_printf(s, " <-")) | |
846 | goto partial; | |
847 | if (!seq_print_ip_sym(s, | |
848 | field->parent_ip, | |
849 | flags)) | |
850 | goto partial; | |
851 | } | |
852 | if (!trace_seq_printf(s, "\n")) | |
853 | goto partial; | |
854 | ||
d9793bd8 | 855 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
856 | |
857 | partial: | |
858 | return TRACE_TYPE_PARTIAL_LINE; | |
859 | } | |
860 | ||
a9a57763 SR |
861 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
862 | struct trace_event *event) | |
f633cef0 SR |
863 | { |
864 | struct ftrace_entry *field; | |
865 | ||
2c9b238e | 866 | trace_assign_type(field, iter->ent); |
f633cef0 | 867 | |
2c9b238e | 868 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
869 | field->ip, |
870 | field->parent_ip)) | |
f633cef0 SR |
871 | return TRACE_TYPE_PARTIAL_LINE; |
872 | ||
d9793bd8 | 873 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
874 | } |
875 | ||
a9a57763 SR |
876 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
877 | struct trace_event *event) | |
f633cef0 SR |
878 | { |
879 | struct ftrace_entry *field; | |
2c9b238e | 880 | struct trace_seq *s = &iter->seq; |
f633cef0 | 881 | |
2c9b238e | 882 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
883 | |
884 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
885 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
886 | ||
d9793bd8 | 887 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
888 | } |
889 | ||
a9a57763 SR |
890 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
891 | struct trace_event *event) | |
f633cef0 SR |
892 | { |
893 | struct ftrace_entry *field; | |
2c9b238e | 894 | struct trace_seq *s = &iter->seq; |
f633cef0 | 895 | |
2c9b238e | 896 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
897 | |
898 | SEQ_PUT_FIELD_RET(s, field->ip); | |
899 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
900 | ||
d9793bd8 | 901 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
902 | } |
903 | ||
a9a57763 | 904 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 905 | .trace = trace_fn_trace, |
f633cef0 SR |
906 | .raw = trace_fn_raw, |
907 | .hex = trace_fn_hex, | |
908 | .binary = trace_fn_bin, | |
909 | }; | |
910 | ||
a9a57763 SR |
911 | static struct trace_event trace_fn_event = { |
912 | .type = TRACE_FN, | |
913 | .funcs = &trace_fn_funcs, | |
914 | }; | |
915 | ||
f633cef0 | 916 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
917 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
918 | char *delim) | |
f633cef0 SR |
919 | { |
920 | struct ctx_switch_entry *field; | |
4ca53085 | 921 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
922 | int S, T; |
923 | ||
4ca53085 | 924 | |
2c9b238e | 925 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
926 | |
927 | T = task_state_char(field->next_state); | |
928 | S = task_state_char(field->prev_state); | |
4ca53085 | 929 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
930 | if (!trace_seq_printf(&iter->seq, |
931 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
932 | field->prev_pid, |
933 | field->prev_prio, | |
934 | S, delim, | |
935 | field->next_cpu, | |
936 | field->next_pid, | |
937 | field->next_prio, | |
938 | T, comm)) | |
f633cef0 SR |
939 | return TRACE_TYPE_PARTIAL_LINE; |
940 | ||
d9793bd8 | 941 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
942 | } |
943 | ||
a9a57763 SR |
944 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
945 | struct trace_event *event) | |
f633cef0 | 946 | { |
2c9b238e | 947 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
948 | } |
949 | ||
ae7462b4 | 950 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 951 | int flags, struct trace_event *event) |
f633cef0 | 952 | { |
2c9b238e | 953 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
954 | } |
955 | ||
2c9b238e | 956 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
957 | { |
958 | struct ctx_switch_entry *field; | |
959 | int T; | |
960 | ||
2c9b238e | 961 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
962 | |
963 | if (!S) | |
b0f56f1a | 964 | S = task_state_char(field->prev_state); |
f633cef0 | 965 | T = task_state_char(field->next_state); |
2c9b238e | 966 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
967 | field->prev_pid, |
968 | field->prev_prio, | |
969 | S, | |
970 | field->next_cpu, | |
971 | field->next_pid, | |
972 | field->next_prio, | |
973 | T)) | |
f633cef0 SR |
974 | return TRACE_TYPE_PARTIAL_LINE; |
975 | ||
d9793bd8 | 976 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
977 | } |
978 | ||
a9a57763 SR |
979 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
980 | struct trace_event *event) | |
f633cef0 | 981 | { |
2c9b238e | 982 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
983 | } |
984 | ||
a9a57763 SR |
985 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
986 | struct trace_event *event) | |
f633cef0 | 987 | { |
2c9b238e | 988 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
989 | } |
990 | ||
991 | ||
2c9b238e | 992 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
993 | { |
994 | struct ctx_switch_entry *field; | |
2c9b238e | 995 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
996 | int T; |
997 | ||
2c9b238e | 998 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
999 | |
1000 | if (!S) | |
b0f56f1a | 1001 | S = task_state_char(field->prev_state); |
f633cef0 SR |
1002 | T = task_state_char(field->next_state); |
1003 | ||
1004 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
1005 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
1006 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
1007 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
1008 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
1009 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
1010 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
1011 | ||
d9793bd8 | 1012 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1013 | } |
1014 | ||
a9a57763 SR |
1015 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1016 | struct trace_event *event) | |
f633cef0 | 1017 | { |
2c9b238e | 1018 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1019 | } |
1020 | ||
a9a57763 SR |
1021 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1022 | struct trace_event *event) | |
f633cef0 | 1023 | { |
2c9b238e | 1024 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1025 | } |
1026 | ||
ae7462b4 | 1027 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1028 | int flags, struct trace_event *event) |
f633cef0 SR |
1029 | { |
1030 | struct ctx_switch_entry *field; | |
2c9b238e | 1031 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1032 | |
2c9b238e | 1033 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1034 | |
1035 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
1036 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
1037 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
1038 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
1039 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
1040 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
1041 | ||
d9793bd8 | 1042 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1043 | } |
1044 | ||
a9a57763 | 1045 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1046 | .trace = trace_ctx_print, |
f633cef0 SR |
1047 | .raw = trace_ctx_raw, |
1048 | .hex = trace_ctx_hex, | |
1049 | .binary = trace_ctxwake_bin, | |
1050 | }; | |
1051 | ||
a9a57763 SR |
1052 | static struct trace_event trace_ctx_event = { |
1053 | .type = TRACE_CTX, | |
1054 | .funcs = &trace_ctx_funcs, | |
1055 | }; | |
1056 | ||
1057 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1058 | .trace = trace_wake_print, |
f633cef0 SR |
1059 | .raw = trace_wake_raw, |
1060 | .hex = trace_wake_hex, | |
1061 | .binary = trace_ctxwake_bin, | |
1062 | }; | |
1063 | ||
a9a57763 SR |
1064 | static struct trace_event trace_wake_event = { |
1065 | .type = TRACE_WAKE, | |
1066 | .funcs = &trace_wake_funcs, | |
1067 | }; | |
1068 | ||
f633cef0 SR |
1069 | /* TRACE_STACK */ |
1070 | ||
ae7462b4 | 1071 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1072 | int flags, struct trace_event *event) |
f633cef0 SR |
1073 | { |
1074 | struct stack_entry *field; | |
2c9b238e | 1075 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1076 | int i; |
1077 | ||
2c9b238e | 1078 | trace_assign_type(field, iter->ent); |
f633cef0 | 1079 | |
563af16c | 1080 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1081 | goto partial; |
f633cef0 | 1082 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { |
f11b3f4e | 1083 | if (!field->caller[i] || (field->caller[i] == ULONG_MAX)) |
1ec7c484 | 1084 | break; |
f11b3f4e | 1085 | if (!trace_seq_puts(s, " => ")) |
1086 | goto partial; | |
f633cef0 | 1087 | |
f11b3f4e | 1088 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
1089 | goto partial; | |
6c1a99af | 1090 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
1091 | goto partial; |
1092 | } | |
1093 | ||
d9793bd8 | 1094 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1095 | |
1096 | partial: | |
1097 | return TRACE_TYPE_PARTIAL_LINE; | |
1098 | } | |
1099 | ||
a9a57763 | 1100 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1101 | .trace = trace_stack_print, |
f633cef0 SR |
1102 | }; |
1103 | ||
a9a57763 SR |
1104 | static struct trace_event trace_stack_event = { |
1105 | .type = TRACE_STACK, | |
1106 | .funcs = &trace_stack_funcs, | |
1107 | }; | |
1108 | ||
f633cef0 | 1109 | /* TRACE_USER_STACK */ |
ae7462b4 | 1110 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1111 | int flags, struct trace_event *event) |
f633cef0 SR |
1112 | { |
1113 | struct userstack_entry *field; | |
2c9b238e | 1114 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1115 | |
2c9b238e | 1116 | trace_assign_type(field, iter->ent); |
f633cef0 | 1117 | |
563af16c | 1118 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1119 | goto partial; |
1120 | ||
048dc50c | 1121 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1122 | goto partial; |
1123 | ||
d9793bd8 | 1124 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1125 | |
1126 | partial: | |
1127 | return TRACE_TYPE_PARTIAL_LINE; | |
1128 | } | |
1129 | ||
a9a57763 | 1130 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1131 | .trace = trace_user_stack_print, |
f633cef0 SR |
1132 | }; |
1133 | ||
a9a57763 SR |
1134 | static struct trace_event trace_user_stack_event = { |
1135 | .type = TRACE_USER_STACK, | |
1136 | .funcs = &trace_user_stack_funcs, | |
1137 | }; | |
1138 | ||
48ead020 | 1139 | /* TRACE_BPRINT */ |
1427cdf0 | 1140 | static enum print_line_t |
a9a57763 SR |
1141 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1142 | struct trace_event *event) | |
1427cdf0 LJ |
1143 | { |
1144 | struct trace_entry *entry = iter->ent; | |
1145 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1146 | struct bprint_entry *field; |
1427cdf0 LJ |
1147 | |
1148 | trace_assign_type(field, entry); | |
1149 | ||
1150 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1151 | goto partial; | |
1152 | ||
1153 | if (!trace_seq_puts(s, ": ")) | |
1154 | goto partial; | |
1155 | ||
1156 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1157 | goto partial; | |
1158 | ||
1159 | return TRACE_TYPE_HANDLED; | |
1160 | ||
1161 | partial: | |
1162 | return TRACE_TYPE_PARTIAL_LINE; | |
1163 | } | |
1164 | ||
769b0441 | 1165 | |
48ead020 | 1166 | static enum print_line_t |
a9a57763 SR |
1167 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1168 | struct trace_event *event) | |
1427cdf0 | 1169 | { |
48ead020 | 1170 | struct bprint_entry *field; |
1427cdf0 | 1171 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1172 | |
769b0441 | 1173 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1174 | |
1175 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1176 | goto partial; | |
1177 | ||
1178 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1179 | goto partial; | |
1180 | ||
1181 | return TRACE_TYPE_HANDLED; | |
1182 | ||
1183 | partial: | |
1184 | return TRACE_TYPE_PARTIAL_LINE; | |
1185 | } | |
1186 | ||
a9a57763 SR |
1187 | static struct trace_event_functions trace_bprint_funcs = { |
1188 | .trace = trace_bprint_print, | |
1189 | .raw = trace_bprint_raw, | |
1190 | }; | |
769b0441 | 1191 | |
48ead020 FW |
1192 | static struct trace_event trace_bprint_event = { |
1193 | .type = TRACE_BPRINT, | |
a9a57763 | 1194 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1195 | }; |
1196 | ||
1197 | /* TRACE_PRINT */ | |
1198 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1199 | int flags, struct trace_event *event) |
48ead020 FW |
1200 | { |
1201 | struct print_entry *field; | |
1202 | struct trace_seq *s = &iter->seq; | |
1203 | ||
1204 | trace_assign_type(field, iter->ent); | |
1205 | ||
1206 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1207 | goto partial; | |
1208 | ||
1209 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1210 | goto partial; | |
1211 | ||
1212 | return TRACE_TYPE_HANDLED; | |
1213 | ||
1214 | partial: | |
1215 | return TRACE_TYPE_PARTIAL_LINE; | |
1216 | } | |
1217 | ||
a9a57763 SR |
1218 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1219 | struct trace_event *event) | |
48ead020 FW |
1220 | { |
1221 | struct print_entry *field; | |
1222 | ||
1223 | trace_assign_type(field, iter->ent); | |
1224 | ||
1225 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1226 | goto partial; | |
1227 | ||
1228 | return TRACE_TYPE_HANDLED; | |
1229 | ||
1230 | partial: | |
1231 | return TRACE_TYPE_PARTIAL_LINE; | |
1232 | } | |
1233 | ||
a9a57763 | 1234 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1235 | .trace = trace_print_print, |
1236 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1237 | }; |
1238 | ||
a9a57763 SR |
1239 | static struct trace_event trace_print_event = { |
1240 | .type = TRACE_PRINT, | |
1241 | .funcs = &trace_print_funcs, | |
1242 | }; | |
1243 | ||
48ead020 | 1244 | |
f633cef0 SR |
1245 | static struct trace_event *events[] __initdata = { |
1246 | &trace_fn_event, | |
1247 | &trace_ctx_event, | |
1248 | &trace_wake_event, | |
f633cef0 SR |
1249 | &trace_stack_event, |
1250 | &trace_user_stack_event, | |
48ead020 | 1251 | &trace_bprint_event, |
f633cef0 SR |
1252 | &trace_print_event, |
1253 | NULL | |
1254 | }; | |
1255 | ||
1256 | __init static int init_events(void) | |
1257 | { | |
1258 | struct trace_event *event; | |
1259 | int i, ret; | |
1260 | ||
1261 | for (i = 0; events[i]; i++) { | |
1262 | event = events[i]; | |
1263 | ||
1264 | ret = register_ftrace_event(event); | |
1265 | if (!ret) { | |
1266 | printk(KERN_WARNING "event %d failed to register\n", | |
1267 | event->type); | |
1268 | WARN_ON_ONCE(1); | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | return 0; | |
1273 | } | |
1274 | device_initcall(init_events); |