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 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 | } | |
212 | ||
b14b70a6 | 213 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e | 214 | { |
d184b31c | 215 | if (s->full) |
f0868d1e SR |
216 | return 0; |
217 | ||
d184b31c JB |
218 | if (len > ((PAGE_SIZE - 1) - s->len)) { |
219 | s->full = 1; | |
220 | return 0; | |
221 | } | |
222 | ||
f0868d1e SR |
223 | memcpy(s->buffer + s->len, mem, len); |
224 | s->len += len; | |
225 | ||
226 | return len; | |
227 | } | |
228 | ||
b14b70a6 | 229 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
230 | { |
231 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 232 | const unsigned char *data = mem; |
f0868d1e SR |
233 | int i, j; |
234 | ||
d184b31c JB |
235 | if (s->full) |
236 | return 0; | |
237 | ||
f0868d1e SR |
238 | #ifdef __BIG_ENDIAN |
239 | for (i = 0, j = 0; i < len; i++) { | |
240 | #else | |
241 | for (i = len-1, j = 0; i >= 0; i--) { | |
242 | #endif | |
243 | hex[j++] = hex_asc_hi(data[i]); | |
244 | hex[j++] = hex_asc_lo(data[i]); | |
245 | } | |
246 | hex[j++] = ' '; | |
247 | ||
248 | return trace_seq_putmem(s, hex, j); | |
249 | } | |
250 | ||
bdd6df6a EGM |
251 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
252 | { | |
253 | void *ret; | |
254 | ||
d184b31c | 255 | if (s->full) |
668eb65f | 256 | return NULL; |
d184b31c JB |
257 | |
258 | if (len > ((PAGE_SIZE - 1) - s->len)) { | |
259 | s->full = 1; | |
bdd6df6a | 260 | return NULL; |
d184b31c | 261 | } |
bdd6df6a EGM |
262 | |
263 | ret = s->buffer + s->len; | |
264 | s->len += len; | |
265 | ||
266 | return ret; | |
267 | } | |
268 | ||
f0868d1e SR |
269 | int trace_seq_path(struct trace_seq *s, struct path *path) |
270 | { | |
271 | unsigned char *p; | |
272 | ||
d184b31c | 273 | if (s->full) |
f0868d1e | 274 | return 0; |
d184b31c JB |
275 | |
276 | if (s->len >= (PAGE_SIZE - 1)) { | |
277 | s->full = 1; | |
278 | return 0; | |
279 | } | |
280 | ||
f0868d1e SR |
281 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); |
282 | if (!IS_ERR(p)) { | |
283 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
284 | if (p) { | |
285 | s->len = p - s->buffer; | |
286 | return 1; | |
287 | } | |
288 | } else { | |
289 | s->buffer[s->len++] = '?'; | |
290 | return 1; | |
291 | } | |
292 | ||
d184b31c | 293 | s->full = 1; |
f0868d1e SR |
294 | return 0; |
295 | } | |
296 | ||
be74b73a SR |
297 | const char * |
298 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
299 | unsigned long flags, | |
300 | const struct trace_print_flags *flag_array) | |
301 | { | |
302 | unsigned long mask; | |
303 | const char *str; | |
56d8bd3f | 304 | const char *ret = p->buffer + p->len; |
be74b73a SR |
305 | int i; |
306 | ||
be74b73a SR |
307 | for (i = 0; flag_array[i].name && flags; i++) { |
308 | ||
309 | mask = flag_array[i].mask; | |
310 | if ((flags & mask) != mask) | |
311 | continue; | |
312 | ||
313 | str = flag_array[i].name; | |
314 | flags &= ~mask; | |
315 | if (p->len && delim) | |
316 | trace_seq_puts(p, delim); | |
317 | trace_seq_puts(p, str); | |
318 | } | |
319 | ||
320 | /* check for left over flags */ | |
321 | if (flags) { | |
322 | if (p->len && delim) | |
323 | trace_seq_puts(p, delim); | |
324 | trace_seq_printf(p, "0x%lx", flags); | |
325 | } | |
326 | ||
327 | trace_seq_putc(p, 0); | |
328 | ||
56d8bd3f | 329 | return ret; |
be74b73a | 330 | } |
ec081ddc | 331 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 332 | |
0f4fc29d SR |
333 | const char * |
334 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
335 | const struct trace_print_flags *symbol_array) | |
336 | { | |
337 | int i; | |
56d8bd3f | 338 | const char *ret = p->buffer + p->len; |
0f4fc29d SR |
339 | |
340 | for (i = 0; symbol_array[i].name; i++) { | |
341 | ||
342 | if (val != symbol_array[i].mask) | |
343 | continue; | |
344 | ||
345 | trace_seq_puts(p, symbol_array[i].name); | |
346 | break; | |
347 | } | |
348 | ||
349 | if (!p->len) | |
350 | trace_seq_printf(p, "0x%lx", val); | |
351 | ||
352 | trace_seq_putc(p, 0); | |
353 | ||
56d8bd3f | 354 | return ret; |
0f4fc29d | 355 | } |
ec081ddc | 356 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 357 | |
f0868d1e SR |
358 | #ifdef CONFIG_KRETPROBES |
359 | static inline const char *kretprobed(const char *name) | |
360 | { | |
361 | static const char tramp_name[] = "kretprobe_trampoline"; | |
362 | int size = sizeof(tramp_name); | |
363 | ||
364 | if (strncmp(tramp_name, name, size) == 0) | |
365 | return "[unknown/kretprobe'd]"; | |
366 | return name; | |
367 | } | |
368 | #else | |
369 | static inline const char *kretprobed(const char *name) | |
370 | { | |
371 | return name; | |
372 | } | |
373 | #endif /* CONFIG_KRETPROBES */ | |
374 | ||
375 | static int | |
376 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
377 | { | |
378 | #ifdef CONFIG_KALLSYMS | |
379 | char str[KSYM_SYMBOL_LEN]; | |
380 | const char *name; | |
381 | ||
382 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
383 | ||
384 | name = kretprobed(str); | |
385 | ||
386 | return trace_seq_printf(s, fmt, name); | |
387 | #endif | |
388 | return 1; | |
389 | } | |
390 | ||
391 | static int | |
392 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
393 | unsigned long address) | |
394 | { | |
395 | #ifdef CONFIG_KALLSYMS | |
396 | char str[KSYM_SYMBOL_LEN]; | |
397 | const char *name; | |
398 | ||
399 | sprint_symbol(str, address); | |
400 | name = kretprobed(str); | |
401 | ||
402 | return trace_seq_printf(s, fmt, name); | |
403 | #endif | |
404 | return 1; | |
405 | } | |
406 | ||
407 | #ifndef CONFIG_64BIT | |
408 | # define IP_FMT "%08lx" | |
409 | #else | |
410 | # define IP_FMT "%016lx" | |
411 | #endif | |
412 | ||
413 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
414 | unsigned long ip, unsigned long sym_flags) | |
415 | { | |
416 | struct file *file = NULL; | |
417 | unsigned long vmstart = 0; | |
418 | int ret = 1; | |
419 | ||
d184b31c JB |
420 | if (s->full) |
421 | return 0; | |
422 | ||
f0868d1e SR |
423 | if (mm) { |
424 | const struct vm_area_struct *vma; | |
425 | ||
426 | down_read(&mm->mmap_sem); | |
427 | vma = find_vma(mm, ip); | |
428 | if (vma) { | |
429 | file = vma->vm_file; | |
430 | vmstart = vma->vm_start; | |
431 | } | |
432 | if (file) { | |
433 | ret = trace_seq_path(s, &file->f_path); | |
434 | if (ret) | |
435 | ret = trace_seq_printf(s, "[+0x%lx]", | |
436 | ip - vmstart); | |
437 | } | |
438 | up_read(&mm->mmap_sem); | |
439 | } | |
440 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
441 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
442 | return ret; | |
443 | } | |
444 | ||
445 | int | |
446 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
447 | unsigned long sym_flags) | |
448 | { | |
449 | struct mm_struct *mm = NULL; | |
450 | int ret = 1; | |
451 | unsigned int i; | |
452 | ||
453 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
454 | struct task_struct *task; | |
455 | /* | |
456 | * we do the lookup on the thread group leader, | |
457 | * since individual threads might have already quit! | |
458 | */ | |
459 | rcu_read_lock(); | |
48659d31 | 460 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
461 | if (task) |
462 | mm = get_task_mm(task); | |
463 | rcu_read_unlock(); | |
464 | } | |
465 | ||
466 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
467 | unsigned long ip = entry->caller[i]; | |
468 | ||
469 | if (ip == ULONG_MAX || !ret) | |
470 | break; | |
048dc50c | 471 | if (ret) |
472 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
473 | if (!ip) { |
474 | if (ret) | |
475 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 476 | if (ret) |
477 | ret = trace_seq_puts(s, "\n"); | |
f0868d1e SR |
478 | continue; |
479 | } | |
480 | if (!ret) | |
481 | break; | |
482 | if (ret) | |
483 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
048dc50c | 484 | ret = trace_seq_puts(s, "\n"); |
f0868d1e SR |
485 | } |
486 | ||
487 | if (mm) | |
488 | mmput(mm); | |
489 | return ret; | |
490 | } | |
491 | ||
492 | int | |
493 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
494 | { | |
495 | int ret; | |
496 | ||
497 | if (!ip) | |
498 | return trace_seq_printf(s, "0"); | |
499 | ||
500 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
501 | ret = seq_print_sym_offset(s, "%s", ip); | |
502 | else | |
503 | ret = seq_print_sym_short(s, "%s", ip); | |
504 | ||
505 | if (!ret) | |
506 | return 0; | |
507 | ||
508 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
509 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
510 | return ret; | |
511 | } | |
512 | ||
f81c972d SR |
513 | /** |
514 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
515 | * @s: trace seq struct to write to | |
516 | * @entry: The trace entry field from the ring buffer | |
517 | * | |
518 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
519 | * count and lock depth. | |
520 | */ | |
521 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be FW |
522 | { |
523 | int hardirq, softirq; | |
637e7e86 | 524 | int ret; |
c4a8e8be | 525 | |
c4a8e8be FW |
526 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
527 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 528 | |
f81c972d | 529 | if (!trace_seq_printf(s, "%c%c%c", |
d9793bd8 ACM |
530 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : |
531 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? | |
532 | 'X' : '.', | |
533 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? | |
534 | 'N' : '.', | |
535 | (hardirq && softirq) ? 'H' : | |
536 | hardirq ? 'h' : softirq ? 's' : '.')) | |
537 | return 0; | |
c4a8e8be | 538 | |
829b876d SR |
539 | if (entry->preempt_count) |
540 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 541 | else |
829b876d SR |
542 | ret = trace_seq_putc(s, '.'); |
543 | ||
637e7e86 SR |
544 | if (!ret) |
545 | return 0; | |
546 | ||
829b876d SR |
547 | if (entry->lock_depth < 0) |
548 | return trace_seq_putc(s, '.'); | |
549 | ||
550 | return trace_seq_printf(s, "%d", entry->lock_depth); | |
c4a8e8be FW |
551 | } |
552 | ||
f81c972d SR |
553 | static int |
554 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
555 | { | |
556 | char comm[TASK_COMM_LEN]; | |
557 | ||
558 | trace_find_cmdline(entry->pid, comm); | |
559 | ||
560 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
561 | comm, entry->pid, cpu)) | |
562 | return 0; | |
563 | ||
564 | return trace_print_lat_fmt(s, entry); | |
565 | } | |
566 | ||
c4a8e8be FW |
567 | static unsigned long preempt_mark_thresh = 100; |
568 | ||
d9793bd8 | 569 | static int |
c4a8e8be FW |
570 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
571 | unsigned long rel_usecs) | |
572 | { | |
d9793bd8 ACM |
573 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
574 | rel_usecs > preempt_mark_thresh ? '!' : | |
575 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
576 | } |
577 | ||
578 | int trace_print_context(struct trace_iterator *iter) | |
579 | { | |
580 | struct trace_seq *s = &iter->seq; | |
581 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
582 | unsigned long long t = ns2usecs(iter->ts); |
583 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
584 | unsigned long secs = (unsigned long)t; | |
4ca53085 SR |
585 | char comm[TASK_COMM_LEN]; |
586 | ||
587 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 588 | |
d9793bd8 | 589 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
1830b52d | 590 | comm, entry->pid, iter->cpu, secs, usec_rem); |
c4a8e8be FW |
591 | } |
592 | ||
593 | int trace_print_lat_context(struct trace_iterator *iter) | |
594 | { | |
595 | u64 next_ts; | |
d9793bd8 | 596 | int ret; |
c4a8e8be FW |
597 | struct trace_seq *s = &iter->seq; |
598 | struct trace_entry *entry = iter->ent, | |
599 | *next_entry = trace_find_next_entry(iter, NULL, | |
600 | &next_ts); | |
601 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
602 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
603 | unsigned long rel_usecs; | |
604 | ||
605 | if (!next_entry) | |
606 | next_ts = iter->ts; | |
607 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
608 | ||
609 | if (verbose) { | |
4ca53085 SR |
610 | char comm[TASK_COMM_LEN]; |
611 | ||
612 | trace_find_cmdline(entry->pid, comm); | |
613 | ||
cf8e3474 | 614 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 615 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 616 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
617 | entry->preempt_count, iter->idx, |
618 | ns2usecs(iter->ts), | |
619 | abs_usecs / USEC_PER_MSEC, | |
620 | abs_usecs % USEC_PER_MSEC, | |
621 | rel_usecs / USEC_PER_MSEC, | |
622 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 623 | } else { |
1830b52d | 624 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
625 | if (ret) |
626 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
627 | } |
628 | ||
d9793bd8 | 629 | return ret; |
c4a8e8be FW |
630 | } |
631 | ||
f633cef0 SR |
632 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
633 | ||
634 | static int task_state_char(unsigned long state) | |
635 | { | |
636 | int bit = state ? __ffs(state) + 1 : 0; | |
637 | ||
638 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
639 | } | |
640 | ||
f0868d1e SR |
641 | /** |
642 | * ftrace_find_event - find a registered event | |
643 | * @type: the type of event to look for | |
644 | * | |
645 | * Returns an event of type @type otherwise NULL | |
4f535968 | 646 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
647 | */ |
648 | struct trace_event *ftrace_find_event(int type) | |
649 | { | |
650 | struct trace_event *event; | |
651 | struct hlist_node *n; | |
652 | unsigned key; | |
653 | ||
654 | key = type & (EVENT_HASHSIZE - 1); | |
655 | ||
4f535968 | 656 | hlist_for_each_entry(event, n, &event_hash[key], node) { |
f0868d1e SR |
657 | if (event->type == type) |
658 | return event; | |
659 | } | |
660 | ||
661 | return NULL; | |
662 | } | |
663 | ||
060fa5c8 SR |
664 | static LIST_HEAD(ftrace_event_list); |
665 | ||
666 | static int trace_search_list(struct list_head **list) | |
667 | { | |
668 | struct trace_event *e; | |
669 | int last = __TRACE_LAST_TYPE; | |
670 | ||
671 | if (list_empty(&ftrace_event_list)) { | |
672 | *list = &ftrace_event_list; | |
673 | return last + 1; | |
674 | } | |
675 | ||
676 | /* | |
677 | * We used up all possible max events, | |
678 | * lets see if somebody freed one. | |
679 | */ | |
680 | list_for_each_entry(e, &ftrace_event_list, list) { | |
681 | if (e->type != last + 1) | |
682 | break; | |
683 | last++; | |
684 | } | |
685 | ||
686 | /* Did we used up all 65 thousand events??? */ | |
687 | if ((last + 1) > FTRACE_MAX_EVENT) | |
688 | return 0; | |
689 | ||
690 | *list = &e->list; | |
691 | return last + 1; | |
692 | } | |
693 | ||
4f535968 LJ |
694 | void trace_event_read_lock(void) |
695 | { | |
696 | down_read(&trace_event_mutex); | |
697 | } | |
698 | ||
699 | void trace_event_read_unlock(void) | |
700 | { | |
701 | up_read(&trace_event_mutex); | |
702 | } | |
703 | ||
f0868d1e SR |
704 | /** |
705 | * register_ftrace_event - register output for an event type | |
706 | * @event: the event type to register | |
707 | * | |
708 | * Event types are stored in a hash and this hash is used to | |
709 | * find a way to print an event. If the @event->type is set | |
710 | * then it will use that type, otherwise it will assign a | |
711 | * type to use. | |
712 | * | |
713 | * If you assign your own type, please make sure it is added | |
714 | * to the trace_type enum in trace.h, to avoid collisions | |
715 | * with the dynamic types. | |
716 | * | |
717 | * Returns the event type number or zero on error. | |
718 | */ | |
719 | int register_ftrace_event(struct trace_event *event) | |
720 | { | |
721 | unsigned key; | |
722 | int ret = 0; | |
723 | ||
4f535968 | 724 | down_write(&trace_event_mutex); |
f0868d1e | 725 | |
060fa5c8 | 726 | if (WARN_ON(!event)) |
28bea271 | 727 | goto out; |
28bea271 | 728 | |
060fa5c8 SR |
729 | INIT_LIST_HEAD(&event->list); |
730 | ||
731 | if (!event->type) { | |
48dd0fed | 732 | struct list_head *list = NULL; |
060fa5c8 SR |
733 | |
734 | if (next_event_type > FTRACE_MAX_EVENT) { | |
735 | ||
736 | event->type = trace_search_list(&list); | |
737 | if (!event->type) | |
738 | goto out; | |
739 | ||
740 | } else { | |
741 | ||
742 | event->type = next_event_type++; | |
743 | list = &ftrace_event_list; | |
744 | } | |
745 | ||
746 | if (WARN_ON(ftrace_find_event(event->type))) | |
747 | goto out; | |
748 | ||
749 | list_add_tail(&event->list, list); | |
750 | ||
751 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
752 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
753 | WARN_ON(1); | |
f0868d1e | 754 | goto out; |
060fa5c8 SR |
755 | } else { |
756 | /* Is this event already used */ | |
757 | if (ftrace_find_event(event->type)) | |
758 | goto out; | |
759 | } | |
f0868d1e | 760 | |
268ccda0 ACM |
761 | if (event->trace == NULL) |
762 | event->trace = trace_nop_print; | |
268ccda0 ACM |
763 | if (event->raw == NULL) |
764 | event->raw = trace_nop_print; | |
765 | if (event->hex == NULL) | |
766 | event->hex = trace_nop_print; | |
767 | if (event->binary == NULL) | |
768 | event->binary = trace_nop_print; | |
769 | ||
f0868d1e SR |
770 | key = event->type & (EVENT_HASHSIZE - 1); |
771 | ||
4f535968 | 772 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
773 | |
774 | ret = event->type; | |
775 | out: | |
4f535968 | 776 | up_write(&trace_event_mutex); |
f0868d1e SR |
777 | |
778 | return ret; | |
779 | } | |
17c873ec | 780 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 781 | |
110bf2b7 SR |
782 | /* |
783 | * Used by module code with the trace_event_mutex held for write. | |
784 | */ | |
785 | int __unregister_ftrace_event(struct trace_event *event) | |
786 | { | |
787 | hlist_del(&event->node); | |
788 | list_del(&event->list); | |
789 | return 0; | |
790 | } | |
791 | ||
f0868d1e SR |
792 | /** |
793 | * unregister_ftrace_event - remove a no longer used event | |
794 | * @event: the event to remove | |
795 | */ | |
796 | int unregister_ftrace_event(struct trace_event *event) | |
797 | { | |
4f535968 | 798 | down_write(&trace_event_mutex); |
110bf2b7 | 799 | __unregister_ftrace_event(event); |
4f535968 | 800 | up_write(&trace_event_mutex); |
f0868d1e SR |
801 | |
802 | return 0; | |
803 | } | |
17c873ec | 804 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
805 | |
806 | /* | |
807 | * Standard events | |
808 | */ | |
809 | ||
ae7462b4 | 810 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags) |
f633cef0 | 811 | { |
d9793bd8 | 812 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
813 | } |
814 | ||
815 | /* TRACE_FN */ | |
ae7462b4 | 816 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags) |
f633cef0 SR |
817 | { |
818 | struct ftrace_entry *field; | |
2c9b238e | 819 | struct trace_seq *s = &iter->seq; |
f633cef0 | 820 | |
2c9b238e | 821 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
822 | |
823 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
824 | goto partial; | |
825 | ||
826 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
827 | if (!trace_seq_printf(s, " <-")) | |
828 | goto partial; | |
829 | if (!seq_print_ip_sym(s, | |
830 | field->parent_ip, | |
831 | flags)) | |
832 | goto partial; | |
833 | } | |
834 | if (!trace_seq_printf(s, "\n")) | |
835 | goto partial; | |
836 | ||
d9793bd8 | 837 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
838 | |
839 | partial: | |
840 | return TRACE_TYPE_PARTIAL_LINE; | |
841 | } | |
842 | ||
ae7462b4 | 843 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags) |
f633cef0 SR |
844 | { |
845 | struct ftrace_entry *field; | |
846 | ||
2c9b238e | 847 | trace_assign_type(field, iter->ent); |
f633cef0 | 848 | |
2c9b238e | 849 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
850 | field->ip, |
851 | field->parent_ip)) | |
f633cef0 SR |
852 | return TRACE_TYPE_PARTIAL_LINE; |
853 | ||
d9793bd8 | 854 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
855 | } |
856 | ||
ae7462b4 | 857 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags) |
f633cef0 SR |
858 | { |
859 | struct ftrace_entry *field; | |
2c9b238e | 860 | struct trace_seq *s = &iter->seq; |
f633cef0 | 861 | |
2c9b238e | 862 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
863 | |
864 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
865 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
866 | ||
d9793bd8 | 867 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
868 | } |
869 | ||
ae7462b4 | 870 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags) |
f633cef0 SR |
871 | { |
872 | struct ftrace_entry *field; | |
2c9b238e | 873 | struct trace_seq *s = &iter->seq; |
f633cef0 | 874 | |
2c9b238e | 875 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
876 | |
877 | SEQ_PUT_FIELD_RET(s, field->ip); | |
878 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
879 | ||
d9793bd8 | 880 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
881 | } |
882 | ||
883 | static struct trace_event trace_fn_event = { | |
ef18012b | 884 | .type = TRACE_FN, |
f633cef0 | 885 | .trace = trace_fn_trace, |
f633cef0 SR |
886 | .raw = trace_fn_raw, |
887 | .hex = trace_fn_hex, | |
888 | .binary = trace_fn_bin, | |
889 | }; | |
890 | ||
891 | /* TRACE_CTX an TRACE_WAKE */ | |
ae7462b4 ACM |
892 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
893 | char *delim) | |
f633cef0 SR |
894 | { |
895 | struct ctx_switch_entry *field; | |
4ca53085 | 896 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
897 | int S, T; |
898 | ||
4ca53085 | 899 | |
2c9b238e | 900 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
901 | |
902 | T = task_state_char(field->next_state); | |
903 | S = task_state_char(field->prev_state); | |
4ca53085 | 904 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
905 | if (!trace_seq_printf(&iter->seq, |
906 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
907 | field->prev_pid, |
908 | field->prev_prio, | |
909 | S, delim, | |
910 | field->next_cpu, | |
911 | field->next_pid, | |
912 | field->next_prio, | |
913 | T, comm)) | |
f633cef0 SR |
914 | return TRACE_TYPE_PARTIAL_LINE; |
915 | ||
d9793bd8 | 916 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
917 | } |
918 | ||
ae7462b4 | 919 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags) |
f633cef0 | 920 | { |
2c9b238e | 921 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
922 | } |
923 | ||
ae7462b4 ACM |
924 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
925 | int flags) | |
f633cef0 | 926 | { |
2c9b238e | 927 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
928 | } |
929 | ||
2c9b238e | 930 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
931 | { |
932 | struct ctx_switch_entry *field; | |
933 | int T; | |
934 | ||
2c9b238e | 935 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
936 | |
937 | if (!S) | |
b0f56f1a | 938 | S = task_state_char(field->prev_state); |
f633cef0 | 939 | T = task_state_char(field->next_state); |
2c9b238e | 940 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
941 | field->prev_pid, |
942 | field->prev_prio, | |
943 | S, | |
944 | field->next_cpu, | |
945 | field->next_pid, | |
946 | field->next_prio, | |
947 | T)) | |
f633cef0 SR |
948 | return TRACE_TYPE_PARTIAL_LINE; |
949 | ||
d9793bd8 | 950 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
951 | } |
952 | ||
ae7462b4 | 953 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 954 | { |
2c9b238e | 955 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
956 | } |
957 | ||
ae7462b4 | 958 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 959 | { |
2c9b238e | 960 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
961 | } |
962 | ||
963 | ||
2c9b238e | 964 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
965 | { |
966 | struct ctx_switch_entry *field; | |
2c9b238e | 967 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
968 | int T; |
969 | ||
2c9b238e | 970 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
971 | |
972 | if (!S) | |
b0f56f1a | 973 | S = task_state_char(field->prev_state); |
f633cef0 SR |
974 | T = task_state_char(field->next_state); |
975 | ||
976 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
977 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
978 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
979 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
980 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
981 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
982 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
983 | ||
d9793bd8 | 984 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
985 | } |
986 | ||
ae7462b4 | 987 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 988 | { |
2c9b238e | 989 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
990 | } |
991 | ||
ae7462b4 | 992 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 993 | { |
2c9b238e | 994 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
995 | } |
996 | ||
ae7462b4 ACM |
997 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
998 | int flags) | |
f633cef0 SR |
999 | { |
1000 | struct ctx_switch_entry *field; | |
2c9b238e | 1001 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1002 | |
2c9b238e | 1003 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1004 | |
1005 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
1006 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
1007 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
1008 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
1009 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
1010 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
1011 | ||
d9793bd8 | 1012 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1013 | } |
1014 | ||
1015 | static struct trace_event trace_ctx_event = { | |
ef18012b | 1016 | .type = TRACE_CTX, |
f633cef0 | 1017 | .trace = trace_ctx_print, |
f633cef0 SR |
1018 | .raw = trace_ctx_raw, |
1019 | .hex = trace_ctx_hex, | |
1020 | .binary = trace_ctxwake_bin, | |
1021 | }; | |
1022 | ||
1023 | static struct trace_event trace_wake_event = { | |
ef18012b | 1024 | .type = TRACE_WAKE, |
f633cef0 | 1025 | .trace = trace_wake_print, |
f633cef0 SR |
1026 | .raw = trace_wake_raw, |
1027 | .hex = trace_wake_hex, | |
1028 | .binary = trace_ctxwake_bin, | |
1029 | }; | |
1030 | ||
1031 | /* TRACE_SPECIAL */ | |
ae7462b4 ACM |
1032 | static enum print_line_t trace_special_print(struct trace_iterator *iter, |
1033 | int flags) | |
f633cef0 SR |
1034 | { |
1035 | struct special_entry *field; | |
1036 | ||
2c9b238e | 1037 | trace_assign_type(field, iter->ent); |
f633cef0 | 1038 | |
2c9b238e | 1039 | if (!trace_seq_printf(&iter->seq, "# %ld %ld %ld\n", |
6c1a99af LJ |
1040 | field->arg1, |
1041 | field->arg2, | |
1042 | field->arg3)) | |
f633cef0 SR |
1043 | return TRACE_TYPE_PARTIAL_LINE; |
1044 | ||
d9793bd8 | 1045 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1046 | } |
1047 | ||
ae7462b4 ACM |
1048 | static enum print_line_t trace_special_hex(struct trace_iterator *iter, |
1049 | int flags) | |
f633cef0 SR |
1050 | { |
1051 | struct special_entry *field; | |
2c9b238e | 1052 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1053 | |
2c9b238e | 1054 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1055 | |
1056 | SEQ_PUT_HEX_FIELD_RET(s, field->arg1); | |
1057 | SEQ_PUT_HEX_FIELD_RET(s, field->arg2); | |
1058 | SEQ_PUT_HEX_FIELD_RET(s, field->arg3); | |
1059 | ||
d9793bd8 | 1060 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1061 | } |
1062 | ||
ae7462b4 ACM |
1063 | static enum print_line_t trace_special_bin(struct trace_iterator *iter, |
1064 | int flags) | |
f633cef0 SR |
1065 | { |
1066 | struct special_entry *field; | |
2c9b238e | 1067 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1068 | |
2c9b238e | 1069 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1070 | |
1071 | SEQ_PUT_FIELD_RET(s, field->arg1); | |
1072 | SEQ_PUT_FIELD_RET(s, field->arg2); | |
1073 | SEQ_PUT_FIELD_RET(s, field->arg3); | |
1074 | ||
d9793bd8 | 1075 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1076 | } |
1077 | ||
1078 | static struct trace_event trace_special_event = { | |
ef18012b | 1079 | .type = TRACE_SPECIAL, |
f633cef0 | 1080 | .trace = trace_special_print, |
f633cef0 SR |
1081 | .raw = trace_special_print, |
1082 | .hex = trace_special_hex, | |
1083 | .binary = trace_special_bin, | |
1084 | }; | |
1085 | ||
1086 | /* TRACE_STACK */ | |
1087 | ||
ae7462b4 ACM |
1088 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
1089 | int flags) | |
f633cef0 SR |
1090 | { |
1091 | struct stack_entry *field; | |
2c9b238e | 1092 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1093 | int i; |
1094 | ||
2c9b238e | 1095 | trace_assign_type(field, iter->ent); |
f633cef0 | 1096 | |
563af16c | 1097 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1098 | goto partial; |
f633cef0 | 1099 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { |
f11b3f4e | 1100 | if (!field->caller[i] || (field->caller[i] == ULONG_MAX)) |
1ec7c484 | 1101 | break; |
f11b3f4e | 1102 | if (!trace_seq_puts(s, " => ")) |
1103 | goto partial; | |
f633cef0 | 1104 | |
f11b3f4e | 1105 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
1106 | goto partial; | |
6c1a99af | 1107 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
1108 | goto partial; |
1109 | } | |
1110 | ||
d9793bd8 | 1111 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1112 | |
1113 | partial: | |
1114 | return TRACE_TYPE_PARTIAL_LINE; | |
1115 | } | |
1116 | ||
1117 | static struct trace_event trace_stack_event = { | |
ef18012b | 1118 | .type = TRACE_STACK, |
f633cef0 | 1119 | .trace = trace_stack_print, |
f633cef0 SR |
1120 | .raw = trace_special_print, |
1121 | .hex = trace_special_hex, | |
1122 | .binary = trace_special_bin, | |
1123 | }; | |
1124 | ||
1125 | /* TRACE_USER_STACK */ | |
ae7462b4 ACM |
1126 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
1127 | int flags) | |
f633cef0 SR |
1128 | { |
1129 | struct userstack_entry *field; | |
2c9b238e | 1130 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1131 | |
2c9b238e | 1132 | trace_assign_type(field, iter->ent); |
f633cef0 | 1133 | |
563af16c | 1134 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1135 | goto partial; |
1136 | ||
048dc50c | 1137 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1138 | goto partial; |
1139 | ||
d9793bd8 | 1140 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1141 | |
1142 | partial: | |
1143 | return TRACE_TYPE_PARTIAL_LINE; | |
1144 | } | |
1145 | ||
1146 | static struct trace_event trace_user_stack_event = { | |
ef18012b | 1147 | .type = TRACE_USER_STACK, |
f633cef0 | 1148 | .trace = trace_user_stack_print, |
f633cef0 SR |
1149 | .raw = trace_special_print, |
1150 | .hex = trace_special_hex, | |
1151 | .binary = trace_special_bin, | |
1152 | }; | |
1153 | ||
48ead020 | 1154 | /* TRACE_BPRINT */ |
1427cdf0 | 1155 | static enum print_line_t |
48ead020 | 1156 | trace_bprint_print(struct trace_iterator *iter, int flags) |
1427cdf0 LJ |
1157 | { |
1158 | struct trace_entry *entry = iter->ent; | |
1159 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1160 | struct bprint_entry *field; |
1427cdf0 LJ |
1161 | |
1162 | trace_assign_type(field, entry); | |
1163 | ||
1164 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1165 | goto partial; | |
1166 | ||
1167 | if (!trace_seq_puts(s, ": ")) | |
1168 | goto partial; | |
1169 | ||
1170 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1171 | goto partial; | |
1172 | ||
1173 | return TRACE_TYPE_HANDLED; | |
1174 | ||
1175 | partial: | |
1176 | return TRACE_TYPE_PARTIAL_LINE; | |
1177 | } | |
1178 | ||
769b0441 | 1179 | |
48ead020 FW |
1180 | static enum print_line_t |
1181 | trace_bprint_raw(struct trace_iterator *iter, int flags) | |
1427cdf0 | 1182 | { |
48ead020 | 1183 | struct bprint_entry *field; |
1427cdf0 | 1184 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1185 | |
769b0441 | 1186 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1187 | |
1188 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1189 | goto partial; | |
1190 | ||
1191 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1192 | goto partial; | |
1193 | ||
1194 | return TRACE_TYPE_HANDLED; | |
1195 | ||
1196 | partial: | |
1197 | return TRACE_TYPE_PARTIAL_LINE; | |
1198 | } | |
1199 | ||
769b0441 | 1200 | |
48ead020 FW |
1201 | static struct trace_event trace_bprint_event = { |
1202 | .type = TRACE_BPRINT, | |
1203 | .trace = trace_bprint_print, | |
1204 | .raw = trace_bprint_raw, | |
1205 | }; | |
1206 | ||
1207 | /* TRACE_PRINT */ | |
1208 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
1209 | int flags) | |
1210 | { | |
1211 | struct print_entry *field; | |
1212 | struct trace_seq *s = &iter->seq; | |
1213 | ||
1214 | trace_assign_type(field, iter->ent); | |
1215 | ||
1216 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1217 | goto partial; | |
1218 | ||
1219 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1220 | goto partial; | |
1221 | ||
1222 | return TRACE_TYPE_HANDLED; | |
1223 | ||
1224 | partial: | |
1225 | return TRACE_TYPE_PARTIAL_LINE; | |
1226 | } | |
1227 | ||
1228 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags) | |
1229 | { | |
1230 | struct print_entry *field; | |
1231 | ||
1232 | trace_assign_type(field, iter->ent); | |
1233 | ||
1234 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1235 | goto partial; | |
1236 | ||
1237 | return TRACE_TYPE_HANDLED; | |
1238 | ||
1239 | partial: | |
1240 | return TRACE_TYPE_PARTIAL_LINE; | |
1241 | } | |
1242 | ||
769b0441 | 1243 | static struct trace_event trace_print_event = { |
48ead020 | 1244 | .type = TRACE_PRINT, |
769b0441 FW |
1245 | .trace = trace_print_print, |
1246 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1247 | }; |
1248 | ||
48ead020 | 1249 | |
f633cef0 SR |
1250 | static struct trace_event *events[] __initdata = { |
1251 | &trace_fn_event, | |
1252 | &trace_ctx_event, | |
1253 | &trace_wake_event, | |
1254 | &trace_special_event, | |
1255 | &trace_stack_event, | |
1256 | &trace_user_stack_event, | |
48ead020 | 1257 | &trace_bprint_event, |
f633cef0 SR |
1258 | &trace_print_event, |
1259 | NULL | |
1260 | }; | |
1261 | ||
1262 | __init static int init_events(void) | |
1263 | { | |
1264 | struct trace_event *event; | |
1265 | int i, ret; | |
1266 | ||
1267 | for (i = 0; events[i]; i++) { | |
1268 | event = events[i]; | |
1269 | ||
1270 | ret = register_ftrace_event(event); | |
1271 | if (!ret) { | |
1272 | printk(KERN_WARNING "event %d failed to register\n", | |
1273 | event->type); | |
1274 | WARN_ON_ONCE(1); | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | return 0; | |
1279 | } | |
1280 | device_initcall(init_events); |