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 | ||
0706f1c4 SR |
26 | void trace_print_seq(struct seq_file *m, struct trace_seq *s) |
27 | { | |
28 | int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len; | |
29 | ||
e1af3aec | 30 | seq_write(m, s->buffer, len); |
0706f1c4 SR |
31 | |
32 | trace_seq_init(s); | |
33 | } | |
34 | ||
5ef841f6 SR |
35 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
36 | { | |
37 | struct trace_seq *s = &iter->seq; | |
38 | struct trace_entry *entry = iter->ent; | |
39 | struct bprint_entry *field; | |
40 | int ret; | |
41 | ||
42 | trace_assign_type(field, entry); | |
43 | ||
44 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
45 | if (!ret) | |
46 | return TRACE_TYPE_PARTIAL_LINE; | |
47 | ||
48 | return TRACE_TYPE_HANDLED; | |
49 | } | |
50 | ||
51 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
52 | { | |
53 | struct trace_seq *s = &iter->seq; | |
54 | struct trace_entry *entry = iter->ent; | |
55 | struct print_entry *field; | |
56 | int ret; | |
57 | ||
58 | trace_assign_type(field, entry); | |
59 | ||
60 | ret = trace_seq_printf(s, "%s", field->buf); | |
61 | if (!ret) | |
62 | return TRACE_TYPE_PARTIAL_LINE; | |
63 | ||
64 | return TRACE_TYPE_HANDLED; | |
65 | } | |
66 | ||
f0868d1e SR |
67 | /** |
68 | * trace_seq_printf - sequence printing of trace information | |
69 | * @s: trace sequence descriptor | |
70 | * @fmt: printf format string | |
71 | * | |
72 | * The tracer may use either sequence operations or its own | |
73 | * copy to user routines. To simplify formating of a trace | |
74 | * trace_seq_printf is used to store strings into a special | |
75 | * buffer (@s). Then the output may be either used by | |
76 | * the sequencer or pulled into another buffer. | |
77 | */ | |
78 | int | |
79 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
80 | { | |
81 | int len = (PAGE_SIZE - 1) - s->len; | |
82 | va_list ap; | |
83 | int ret; | |
84 | ||
85 | if (!len) | |
86 | return 0; | |
87 | ||
88 | va_start(ap, fmt); | |
89 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
90 | va_end(ap); | |
91 | ||
92 | /* If we can't write it all, don't bother writing anything */ | |
93 | if (ret >= len) | |
94 | return 0; | |
95 | ||
96 | s->len += ret; | |
97 | ||
98 | return len; | |
99 | } | |
17c873ec | 100 | EXPORT_SYMBOL_GPL(trace_seq_printf); |
f0868d1e | 101 | |
725c624a SR |
102 | /** |
103 | * trace_seq_vprintf - sequence printing of trace information | |
104 | * @s: trace sequence descriptor | |
105 | * @fmt: printf format string | |
106 | * | |
107 | * The tracer may use either sequence operations or its own | |
108 | * copy to user routines. To simplify formating of a trace | |
109 | * trace_seq_printf is used to store strings into a special | |
110 | * buffer (@s). Then the output may be either used by | |
111 | * the sequencer or pulled into another buffer. | |
112 | */ | |
113 | int | |
114 | trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) | |
115 | { | |
116 | int len = (PAGE_SIZE - 1) - s->len; | |
117 | int ret; | |
118 | ||
119 | if (!len) | |
120 | return 0; | |
121 | ||
122 | ret = vsnprintf(s->buffer + s->len, len, fmt, args); | |
123 | ||
124 | /* If we can't write it all, don't bother writing anything */ | |
125 | if (ret >= len) | |
126 | return 0; | |
127 | ||
128 | s->len += ret; | |
129 | ||
130 | return len; | |
131 | } | |
132 | EXPORT_SYMBOL_GPL(trace_seq_vprintf); | |
133 | ||
769b0441 | 134 | int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
1427cdf0 LJ |
135 | { |
136 | int len = (PAGE_SIZE - 1) - s->len; | |
137 | int ret; | |
138 | ||
139 | if (!len) | |
140 | return 0; | |
141 | ||
142 | ret = bstr_printf(s->buffer + s->len, len, fmt, binary); | |
143 | ||
144 | /* If we can't write it all, don't bother writing anything */ | |
145 | if (ret >= len) | |
146 | return 0; | |
147 | ||
148 | s->len += ret; | |
149 | ||
150 | return len; | |
151 | } | |
152 | ||
f0868d1e SR |
153 | /** |
154 | * trace_seq_puts - trace sequence printing of simple string | |
155 | * @s: trace sequence descriptor | |
156 | * @str: simple string to record | |
157 | * | |
158 | * The tracer may use either the sequence operations or its own | |
159 | * copy to user routines. This function records a simple string | |
160 | * into a special buffer (@s) for later retrieval by a sequencer | |
161 | * or other mechanism. | |
162 | */ | |
163 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
164 | { | |
165 | int len = strlen(str); | |
166 | ||
167 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
168 | return 0; | |
169 | ||
170 | memcpy(s->buffer + s->len, str, len); | |
171 | s->len += len; | |
172 | ||
173 | return len; | |
174 | } | |
175 | ||
176 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
177 | { | |
178 | if (s->len >= (PAGE_SIZE - 1)) | |
179 | return 0; | |
180 | ||
181 | s->buffer[s->len++] = c; | |
182 | ||
183 | return 1; | |
184 | } | |
185 | ||
b14b70a6 | 186 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
187 | { |
188 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
189 | return 0; | |
190 | ||
191 | memcpy(s->buffer + s->len, mem, len); | |
192 | s->len += len; | |
193 | ||
194 | return len; | |
195 | } | |
196 | ||
b14b70a6 | 197 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
198 | { |
199 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 200 | const unsigned char *data = mem; |
f0868d1e SR |
201 | int i, j; |
202 | ||
203 | #ifdef __BIG_ENDIAN | |
204 | for (i = 0, j = 0; i < len; i++) { | |
205 | #else | |
206 | for (i = len-1, j = 0; i >= 0; i--) { | |
207 | #endif | |
208 | hex[j++] = hex_asc_hi(data[i]); | |
209 | hex[j++] = hex_asc_lo(data[i]); | |
210 | } | |
211 | hex[j++] = ' '; | |
212 | ||
213 | return trace_seq_putmem(s, hex, j); | |
214 | } | |
215 | ||
bdd6df6a EGM |
216 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
217 | { | |
218 | void *ret; | |
219 | ||
220 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
221 | return NULL; | |
222 | ||
223 | ret = s->buffer + s->len; | |
224 | s->len += len; | |
225 | ||
226 | return ret; | |
227 | } | |
228 | ||
f0868d1e SR |
229 | int trace_seq_path(struct trace_seq *s, struct path *path) |
230 | { | |
231 | unsigned char *p; | |
232 | ||
233 | if (s->len >= (PAGE_SIZE - 1)) | |
234 | return 0; | |
235 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); | |
236 | if (!IS_ERR(p)) { | |
237 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
238 | if (p) { | |
239 | s->len = p - s->buffer; | |
240 | return 1; | |
241 | } | |
242 | } else { | |
243 | s->buffer[s->len++] = '?'; | |
244 | return 1; | |
245 | } | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
be74b73a SR |
250 | const char * |
251 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
252 | unsigned long flags, | |
253 | const struct trace_print_flags *flag_array) | |
254 | { | |
255 | unsigned long mask; | |
256 | const char *str; | |
56d8bd3f | 257 | const char *ret = p->buffer + p->len; |
be74b73a SR |
258 | int i; |
259 | ||
be74b73a SR |
260 | for (i = 0; flag_array[i].name && flags; i++) { |
261 | ||
262 | mask = flag_array[i].mask; | |
263 | if ((flags & mask) != mask) | |
264 | continue; | |
265 | ||
266 | str = flag_array[i].name; | |
267 | flags &= ~mask; | |
268 | if (p->len && delim) | |
269 | trace_seq_puts(p, delim); | |
270 | trace_seq_puts(p, str); | |
271 | } | |
272 | ||
273 | /* check for left over flags */ | |
274 | if (flags) { | |
275 | if (p->len && delim) | |
276 | trace_seq_puts(p, delim); | |
277 | trace_seq_printf(p, "0x%lx", flags); | |
278 | } | |
279 | ||
280 | trace_seq_putc(p, 0); | |
281 | ||
56d8bd3f | 282 | return ret; |
be74b73a | 283 | } |
ec081ddc | 284 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 285 | |
0f4fc29d SR |
286 | const char * |
287 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
288 | const struct trace_print_flags *symbol_array) | |
289 | { | |
290 | int i; | |
56d8bd3f | 291 | const char *ret = p->buffer + p->len; |
0f4fc29d SR |
292 | |
293 | for (i = 0; symbol_array[i].name; i++) { | |
294 | ||
295 | if (val != symbol_array[i].mask) | |
296 | continue; | |
297 | ||
298 | trace_seq_puts(p, symbol_array[i].name); | |
299 | break; | |
300 | } | |
301 | ||
302 | if (!p->len) | |
303 | trace_seq_printf(p, "0x%lx", val); | |
304 | ||
305 | trace_seq_putc(p, 0); | |
306 | ||
56d8bd3f | 307 | return ret; |
0f4fc29d | 308 | } |
ec081ddc | 309 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 310 | |
f0868d1e SR |
311 | #ifdef CONFIG_KRETPROBES |
312 | static inline const char *kretprobed(const char *name) | |
313 | { | |
314 | static const char tramp_name[] = "kretprobe_trampoline"; | |
315 | int size = sizeof(tramp_name); | |
316 | ||
317 | if (strncmp(tramp_name, name, size) == 0) | |
318 | return "[unknown/kretprobe'd]"; | |
319 | return name; | |
320 | } | |
321 | #else | |
322 | static inline const char *kretprobed(const char *name) | |
323 | { | |
324 | return name; | |
325 | } | |
326 | #endif /* CONFIG_KRETPROBES */ | |
327 | ||
328 | static int | |
329 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
330 | { | |
331 | #ifdef CONFIG_KALLSYMS | |
332 | char str[KSYM_SYMBOL_LEN]; | |
333 | const char *name; | |
334 | ||
335 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
336 | ||
337 | name = kretprobed(str); | |
338 | ||
339 | return trace_seq_printf(s, fmt, name); | |
340 | #endif | |
341 | return 1; | |
342 | } | |
343 | ||
344 | static int | |
345 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
346 | unsigned long address) | |
347 | { | |
348 | #ifdef CONFIG_KALLSYMS | |
349 | char str[KSYM_SYMBOL_LEN]; | |
350 | const char *name; | |
351 | ||
352 | sprint_symbol(str, address); | |
353 | name = kretprobed(str); | |
354 | ||
355 | return trace_seq_printf(s, fmt, name); | |
356 | #endif | |
357 | return 1; | |
358 | } | |
359 | ||
360 | #ifndef CONFIG_64BIT | |
361 | # define IP_FMT "%08lx" | |
362 | #else | |
363 | # define IP_FMT "%016lx" | |
364 | #endif | |
365 | ||
366 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
367 | unsigned long ip, unsigned long sym_flags) | |
368 | { | |
369 | struct file *file = NULL; | |
370 | unsigned long vmstart = 0; | |
371 | int ret = 1; | |
372 | ||
373 | if (mm) { | |
374 | const struct vm_area_struct *vma; | |
375 | ||
376 | down_read(&mm->mmap_sem); | |
377 | vma = find_vma(mm, ip); | |
378 | if (vma) { | |
379 | file = vma->vm_file; | |
380 | vmstart = vma->vm_start; | |
381 | } | |
382 | if (file) { | |
383 | ret = trace_seq_path(s, &file->f_path); | |
384 | if (ret) | |
385 | ret = trace_seq_printf(s, "[+0x%lx]", | |
386 | ip - vmstart); | |
387 | } | |
388 | up_read(&mm->mmap_sem); | |
389 | } | |
390 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
391 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
392 | return ret; | |
393 | } | |
394 | ||
395 | int | |
396 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
397 | unsigned long sym_flags) | |
398 | { | |
399 | struct mm_struct *mm = NULL; | |
400 | int ret = 1; | |
401 | unsigned int i; | |
402 | ||
403 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
404 | struct task_struct *task; | |
405 | /* | |
406 | * we do the lookup on the thread group leader, | |
407 | * since individual threads might have already quit! | |
408 | */ | |
409 | rcu_read_lock(); | |
48659d31 | 410 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
411 | if (task) |
412 | mm = get_task_mm(task); | |
413 | rcu_read_unlock(); | |
414 | } | |
415 | ||
416 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
417 | unsigned long ip = entry->caller[i]; | |
418 | ||
419 | if (ip == ULONG_MAX || !ret) | |
420 | break; | |
048dc50c | 421 | if (ret) |
422 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
423 | if (!ip) { |
424 | if (ret) | |
425 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 426 | if (ret) |
427 | ret = trace_seq_puts(s, "\n"); | |
f0868d1e SR |
428 | continue; |
429 | } | |
430 | if (!ret) | |
431 | break; | |
432 | if (ret) | |
433 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
048dc50c | 434 | ret = trace_seq_puts(s, "\n"); |
f0868d1e SR |
435 | } |
436 | ||
437 | if (mm) | |
438 | mmput(mm); | |
439 | return ret; | |
440 | } | |
441 | ||
442 | int | |
443 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
444 | { | |
445 | int ret; | |
446 | ||
447 | if (!ip) | |
448 | return trace_seq_printf(s, "0"); | |
449 | ||
450 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
451 | ret = seq_print_sym_offset(s, "%s", ip); | |
452 | else | |
453 | ret = seq_print_sym_short(s, "%s", ip); | |
454 | ||
455 | if (!ret) | |
456 | return 0; | |
457 | ||
458 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
459 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
460 | return ret; | |
461 | } | |
462 | ||
f81c972d SR |
463 | /** |
464 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
465 | * @s: trace seq struct to write to | |
466 | * @entry: The trace entry field from the ring buffer | |
467 | * | |
468 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
469 | * count and lock depth. | |
470 | */ | |
471 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be FW |
472 | { |
473 | int hardirq, softirq; | |
637e7e86 | 474 | int ret; |
c4a8e8be | 475 | |
c4a8e8be FW |
476 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
477 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 478 | |
f81c972d | 479 | if (!trace_seq_printf(s, "%c%c%c", |
d9793bd8 ACM |
480 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : |
481 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? | |
482 | 'X' : '.', | |
483 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? | |
484 | 'N' : '.', | |
485 | (hardirq && softirq) ? 'H' : | |
486 | hardirq ? 'h' : softirq ? 's' : '.')) | |
487 | return 0; | |
c4a8e8be | 488 | |
637e7e86 SR |
489 | if (entry->lock_depth < 0) |
490 | ret = trace_seq_putc(s, '.'); | |
491 | else | |
492 | ret = trace_seq_printf(s, "%d", entry->lock_depth); | |
493 | if (!ret) | |
494 | return 0; | |
495 | ||
c4a8e8be | 496 | if (entry->preempt_count) |
d9793bd8 | 497 | return trace_seq_printf(s, "%x", entry->preempt_count); |
637e7e86 | 498 | return trace_seq_putc(s, '.'); |
c4a8e8be FW |
499 | } |
500 | ||
f81c972d SR |
501 | static int |
502 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
503 | { | |
504 | char comm[TASK_COMM_LEN]; | |
505 | ||
506 | trace_find_cmdline(entry->pid, comm); | |
507 | ||
508 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
509 | comm, entry->pid, cpu)) | |
510 | return 0; | |
511 | ||
512 | return trace_print_lat_fmt(s, entry); | |
513 | } | |
514 | ||
c4a8e8be FW |
515 | static unsigned long preempt_mark_thresh = 100; |
516 | ||
d9793bd8 | 517 | static int |
c4a8e8be FW |
518 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
519 | unsigned long rel_usecs) | |
520 | { | |
d9793bd8 ACM |
521 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
522 | rel_usecs > preempt_mark_thresh ? '!' : | |
523 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
524 | } |
525 | ||
526 | int trace_print_context(struct trace_iterator *iter) | |
527 | { | |
528 | struct trace_seq *s = &iter->seq; | |
529 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
530 | unsigned long long t = ns2usecs(iter->ts); |
531 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
532 | unsigned long secs = (unsigned long)t; | |
4ca53085 SR |
533 | char comm[TASK_COMM_LEN]; |
534 | ||
535 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 536 | |
d9793bd8 | 537 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
1830b52d | 538 | comm, entry->pid, iter->cpu, secs, usec_rem); |
c4a8e8be FW |
539 | } |
540 | ||
541 | int trace_print_lat_context(struct trace_iterator *iter) | |
542 | { | |
543 | u64 next_ts; | |
d9793bd8 | 544 | int ret; |
c4a8e8be FW |
545 | struct trace_seq *s = &iter->seq; |
546 | struct trace_entry *entry = iter->ent, | |
547 | *next_entry = trace_find_next_entry(iter, NULL, | |
548 | &next_ts); | |
549 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
550 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
551 | unsigned long rel_usecs; | |
552 | ||
553 | if (!next_entry) | |
554 | next_ts = iter->ts; | |
555 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
556 | ||
557 | if (verbose) { | |
4ca53085 SR |
558 | char comm[TASK_COMM_LEN]; |
559 | ||
560 | trace_find_cmdline(entry->pid, comm); | |
561 | ||
cf8e3474 | 562 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 563 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 564 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
565 | entry->preempt_count, iter->idx, |
566 | ns2usecs(iter->ts), | |
567 | abs_usecs / USEC_PER_MSEC, | |
568 | abs_usecs % USEC_PER_MSEC, | |
569 | rel_usecs / USEC_PER_MSEC, | |
570 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 571 | } else { |
1830b52d | 572 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
573 | if (ret) |
574 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
575 | } |
576 | ||
d9793bd8 | 577 | return ret; |
c4a8e8be FW |
578 | } |
579 | ||
f633cef0 SR |
580 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
581 | ||
582 | static int task_state_char(unsigned long state) | |
583 | { | |
584 | int bit = state ? __ffs(state) + 1 : 0; | |
585 | ||
586 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
587 | } | |
588 | ||
f0868d1e SR |
589 | /** |
590 | * ftrace_find_event - find a registered event | |
591 | * @type: the type of event to look for | |
592 | * | |
593 | * Returns an event of type @type otherwise NULL | |
4f535968 | 594 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
595 | */ |
596 | struct trace_event *ftrace_find_event(int type) | |
597 | { | |
598 | struct trace_event *event; | |
599 | struct hlist_node *n; | |
600 | unsigned key; | |
601 | ||
602 | key = type & (EVENT_HASHSIZE - 1); | |
603 | ||
4f535968 | 604 | hlist_for_each_entry(event, n, &event_hash[key], node) { |
f0868d1e SR |
605 | if (event->type == type) |
606 | return event; | |
607 | } | |
608 | ||
609 | return NULL; | |
610 | } | |
611 | ||
060fa5c8 SR |
612 | static LIST_HEAD(ftrace_event_list); |
613 | ||
614 | static int trace_search_list(struct list_head **list) | |
615 | { | |
616 | struct trace_event *e; | |
617 | int last = __TRACE_LAST_TYPE; | |
618 | ||
619 | if (list_empty(&ftrace_event_list)) { | |
620 | *list = &ftrace_event_list; | |
621 | return last + 1; | |
622 | } | |
623 | ||
624 | /* | |
625 | * We used up all possible max events, | |
626 | * lets see if somebody freed one. | |
627 | */ | |
628 | list_for_each_entry(e, &ftrace_event_list, list) { | |
629 | if (e->type != last + 1) | |
630 | break; | |
631 | last++; | |
632 | } | |
633 | ||
634 | /* Did we used up all 65 thousand events??? */ | |
635 | if ((last + 1) > FTRACE_MAX_EVENT) | |
636 | return 0; | |
637 | ||
638 | *list = &e->list; | |
639 | return last + 1; | |
640 | } | |
641 | ||
4f535968 LJ |
642 | void trace_event_read_lock(void) |
643 | { | |
644 | down_read(&trace_event_mutex); | |
645 | } | |
646 | ||
647 | void trace_event_read_unlock(void) | |
648 | { | |
649 | up_read(&trace_event_mutex); | |
650 | } | |
651 | ||
f0868d1e SR |
652 | /** |
653 | * register_ftrace_event - register output for an event type | |
654 | * @event: the event type to register | |
655 | * | |
656 | * Event types are stored in a hash and this hash is used to | |
657 | * find a way to print an event. If the @event->type is set | |
658 | * then it will use that type, otherwise it will assign a | |
659 | * type to use. | |
660 | * | |
661 | * If you assign your own type, please make sure it is added | |
662 | * to the trace_type enum in trace.h, to avoid collisions | |
663 | * with the dynamic types. | |
664 | * | |
665 | * Returns the event type number or zero on error. | |
666 | */ | |
667 | int register_ftrace_event(struct trace_event *event) | |
668 | { | |
669 | unsigned key; | |
670 | int ret = 0; | |
671 | ||
4f535968 | 672 | down_write(&trace_event_mutex); |
f0868d1e | 673 | |
060fa5c8 | 674 | if (WARN_ON(!event)) |
28bea271 | 675 | goto out; |
28bea271 | 676 | |
060fa5c8 SR |
677 | INIT_LIST_HEAD(&event->list); |
678 | ||
679 | if (!event->type) { | |
48dd0fed | 680 | struct list_head *list = NULL; |
060fa5c8 SR |
681 | |
682 | if (next_event_type > FTRACE_MAX_EVENT) { | |
683 | ||
684 | event->type = trace_search_list(&list); | |
685 | if (!event->type) | |
686 | goto out; | |
687 | ||
688 | } else { | |
689 | ||
690 | event->type = next_event_type++; | |
691 | list = &ftrace_event_list; | |
692 | } | |
693 | ||
694 | if (WARN_ON(ftrace_find_event(event->type))) | |
695 | goto out; | |
696 | ||
697 | list_add_tail(&event->list, list); | |
698 | ||
699 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
700 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
701 | WARN_ON(1); | |
f0868d1e | 702 | goto out; |
060fa5c8 SR |
703 | } else { |
704 | /* Is this event already used */ | |
705 | if (ftrace_find_event(event->type)) | |
706 | goto out; | |
707 | } | |
f0868d1e | 708 | |
268ccda0 ACM |
709 | if (event->trace == NULL) |
710 | event->trace = trace_nop_print; | |
268ccda0 ACM |
711 | if (event->raw == NULL) |
712 | event->raw = trace_nop_print; | |
713 | if (event->hex == NULL) | |
714 | event->hex = trace_nop_print; | |
715 | if (event->binary == NULL) | |
716 | event->binary = trace_nop_print; | |
717 | ||
f0868d1e SR |
718 | key = event->type & (EVENT_HASHSIZE - 1); |
719 | ||
4f535968 | 720 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
721 | |
722 | ret = event->type; | |
723 | out: | |
4f535968 | 724 | up_write(&trace_event_mutex); |
f0868d1e SR |
725 | |
726 | return ret; | |
727 | } | |
17c873ec | 728 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 729 | |
110bf2b7 SR |
730 | /* |
731 | * Used by module code with the trace_event_mutex held for write. | |
732 | */ | |
733 | int __unregister_ftrace_event(struct trace_event *event) | |
734 | { | |
735 | hlist_del(&event->node); | |
736 | list_del(&event->list); | |
737 | return 0; | |
738 | } | |
739 | ||
f0868d1e SR |
740 | /** |
741 | * unregister_ftrace_event - remove a no longer used event | |
742 | * @event: the event to remove | |
743 | */ | |
744 | int unregister_ftrace_event(struct trace_event *event) | |
745 | { | |
4f535968 | 746 | down_write(&trace_event_mutex); |
110bf2b7 | 747 | __unregister_ftrace_event(event); |
4f535968 | 748 | up_write(&trace_event_mutex); |
f0868d1e SR |
749 | |
750 | return 0; | |
751 | } | |
17c873ec | 752 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
753 | |
754 | /* | |
755 | * Standard events | |
756 | */ | |
757 | ||
ae7462b4 | 758 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags) |
f633cef0 | 759 | { |
d9793bd8 | 760 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
761 | } |
762 | ||
763 | /* TRACE_FN */ | |
ae7462b4 | 764 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags) |
f633cef0 SR |
765 | { |
766 | struct ftrace_entry *field; | |
2c9b238e | 767 | struct trace_seq *s = &iter->seq; |
f633cef0 | 768 | |
2c9b238e | 769 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
770 | |
771 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
772 | goto partial; | |
773 | ||
774 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
775 | if (!trace_seq_printf(s, " <-")) | |
776 | goto partial; | |
777 | if (!seq_print_ip_sym(s, | |
778 | field->parent_ip, | |
779 | flags)) | |
780 | goto partial; | |
781 | } | |
782 | if (!trace_seq_printf(s, "\n")) | |
783 | goto partial; | |
784 | ||
d9793bd8 | 785 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
786 | |
787 | partial: | |
788 | return TRACE_TYPE_PARTIAL_LINE; | |
789 | } | |
790 | ||
ae7462b4 | 791 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags) |
f633cef0 SR |
792 | { |
793 | struct ftrace_entry *field; | |
794 | ||
2c9b238e | 795 | trace_assign_type(field, iter->ent); |
f633cef0 | 796 | |
2c9b238e | 797 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
798 | field->ip, |
799 | field->parent_ip)) | |
f633cef0 SR |
800 | return TRACE_TYPE_PARTIAL_LINE; |
801 | ||
d9793bd8 | 802 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
803 | } |
804 | ||
ae7462b4 | 805 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags) |
f633cef0 SR |
806 | { |
807 | struct ftrace_entry *field; | |
2c9b238e | 808 | struct trace_seq *s = &iter->seq; |
f633cef0 | 809 | |
2c9b238e | 810 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
811 | |
812 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
813 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
814 | ||
d9793bd8 | 815 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
816 | } |
817 | ||
ae7462b4 | 818 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags) |
f633cef0 SR |
819 | { |
820 | struct ftrace_entry *field; | |
2c9b238e | 821 | struct trace_seq *s = &iter->seq; |
f633cef0 | 822 | |
2c9b238e | 823 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
824 | |
825 | SEQ_PUT_FIELD_RET(s, field->ip); | |
826 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
827 | ||
d9793bd8 | 828 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
829 | } |
830 | ||
831 | static struct trace_event trace_fn_event = { | |
ef18012b | 832 | .type = TRACE_FN, |
f633cef0 | 833 | .trace = trace_fn_trace, |
f633cef0 SR |
834 | .raw = trace_fn_raw, |
835 | .hex = trace_fn_hex, | |
836 | .binary = trace_fn_bin, | |
837 | }; | |
838 | ||
839 | /* TRACE_CTX an TRACE_WAKE */ | |
ae7462b4 ACM |
840 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
841 | char *delim) | |
f633cef0 SR |
842 | { |
843 | struct ctx_switch_entry *field; | |
4ca53085 | 844 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
845 | int S, T; |
846 | ||
4ca53085 | 847 | |
2c9b238e | 848 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
849 | |
850 | T = task_state_char(field->next_state); | |
851 | S = task_state_char(field->prev_state); | |
4ca53085 | 852 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
853 | if (!trace_seq_printf(&iter->seq, |
854 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
855 | field->prev_pid, |
856 | field->prev_prio, | |
857 | S, delim, | |
858 | field->next_cpu, | |
859 | field->next_pid, | |
860 | field->next_prio, | |
861 | T, comm)) | |
f633cef0 SR |
862 | return TRACE_TYPE_PARTIAL_LINE; |
863 | ||
d9793bd8 | 864 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
865 | } |
866 | ||
ae7462b4 | 867 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags) |
f633cef0 | 868 | { |
2c9b238e | 869 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
870 | } |
871 | ||
ae7462b4 ACM |
872 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
873 | int flags) | |
f633cef0 | 874 | { |
2c9b238e | 875 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
876 | } |
877 | ||
2c9b238e | 878 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
879 | { |
880 | struct ctx_switch_entry *field; | |
881 | int T; | |
882 | ||
2c9b238e | 883 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
884 | |
885 | if (!S) | |
b0f56f1a | 886 | S = task_state_char(field->prev_state); |
f633cef0 | 887 | T = task_state_char(field->next_state); |
2c9b238e | 888 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
889 | field->prev_pid, |
890 | field->prev_prio, | |
891 | S, | |
892 | field->next_cpu, | |
893 | field->next_pid, | |
894 | field->next_prio, | |
895 | T)) | |
f633cef0 SR |
896 | return TRACE_TYPE_PARTIAL_LINE; |
897 | ||
d9793bd8 | 898 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
899 | } |
900 | ||
ae7462b4 | 901 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 902 | { |
2c9b238e | 903 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
904 | } |
905 | ||
ae7462b4 | 906 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 907 | { |
2c9b238e | 908 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
909 | } |
910 | ||
911 | ||
2c9b238e | 912 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
913 | { |
914 | struct ctx_switch_entry *field; | |
2c9b238e | 915 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
916 | int T; |
917 | ||
2c9b238e | 918 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
919 | |
920 | if (!S) | |
b0f56f1a | 921 | S = task_state_char(field->prev_state); |
f633cef0 SR |
922 | T = task_state_char(field->next_state); |
923 | ||
924 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
925 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
926 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
927 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
928 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
929 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
930 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
931 | ||
d9793bd8 | 932 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
933 | } |
934 | ||
ae7462b4 | 935 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 936 | { |
2c9b238e | 937 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
938 | } |
939 | ||
ae7462b4 | 940 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 941 | { |
2c9b238e | 942 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
943 | } |
944 | ||
ae7462b4 ACM |
945 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
946 | int flags) | |
f633cef0 SR |
947 | { |
948 | struct ctx_switch_entry *field; | |
2c9b238e | 949 | struct trace_seq *s = &iter->seq; |
f633cef0 | 950 | |
2c9b238e | 951 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
952 | |
953 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
954 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
955 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
956 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
957 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
958 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
959 | ||
d9793bd8 | 960 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
961 | } |
962 | ||
963 | static struct trace_event trace_ctx_event = { | |
ef18012b | 964 | .type = TRACE_CTX, |
f633cef0 | 965 | .trace = trace_ctx_print, |
f633cef0 SR |
966 | .raw = trace_ctx_raw, |
967 | .hex = trace_ctx_hex, | |
968 | .binary = trace_ctxwake_bin, | |
969 | }; | |
970 | ||
971 | static struct trace_event trace_wake_event = { | |
ef18012b | 972 | .type = TRACE_WAKE, |
f633cef0 | 973 | .trace = trace_wake_print, |
f633cef0 SR |
974 | .raw = trace_wake_raw, |
975 | .hex = trace_wake_hex, | |
976 | .binary = trace_ctxwake_bin, | |
977 | }; | |
978 | ||
979 | /* TRACE_SPECIAL */ | |
ae7462b4 ACM |
980 | static enum print_line_t trace_special_print(struct trace_iterator *iter, |
981 | int flags) | |
f633cef0 SR |
982 | { |
983 | struct special_entry *field; | |
984 | ||
2c9b238e | 985 | trace_assign_type(field, iter->ent); |
f633cef0 | 986 | |
2c9b238e | 987 | if (!trace_seq_printf(&iter->seq, "# %ld %ld %ld\n", |
6c1a99af LJ |
988 | field->arg1, |
989 | field->arg2, | |
990 | field->arg3)) | |
f633cef0 SR |
991 | return TRACE_TYPE_PARTIAL_LINE; |
992 | ||
d9793bd8 | 993 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
994 | } |
995 | ||
ae7462b4 ACM |
996 | static enum print_line_t trace_special_hex(struct trace_iterator *iter, |
997 | int flags) | |
f633cef0 SR |
998 | { |
999 | struct special_entry *field; | |
2c9b238e | 1000 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1001 | |
2c9b238e | 1002 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1003 | |
1004 | SEQ_PUT_HEX_FIELD_RET(s, field->arg1); | |
1005 | SEQ_PUT_HEX_FIELD_RET(s, field->arg2); | |
1006 | SEQ_PUT_HEX_FIELD_RET(s, field->arg3); | |
1007 | ||
d9793bd8 | 1008 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1009 | } |
1010 | ||
ae7462b4 ACM |
1011 | static enum print_line_t trace_special_bin(struct trace_iterator *iter, |
1012 | int flags) | |
f633cef0 SR |
1013 | { |
1014 | struct special_entry *field; | |
2c9b238e | 1015 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1016 | |
2c9b238e | 1017 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1018 | |
1019 | SEQ_PUT_FIELD_RET(s, field->arg1); | |
1020 | SEQ_PUT_FIELD_RET(s, field->arg2); | |
1021 | SEQ_PUT_FIELD_RET(s, field->arg3); | |
1022 | ||
d9793bd8 | 1023 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1024 | } |
1025 | ||
1026 | static struct trace_event trace_special_event = { | |
ef18012b | 1027 | .type = TRACE_SPECIAL, |
f633cef0 | 1028 | .trace = trace_special_print, |
f633cef0 SR |
1029 | .raw = trace_special_print, |
1030 | .hex = trace_special_hex, | |
1031 | .binary = trace_special_bin, | |
1032 | }; | |
1033 | ||
1034 | /* TRACE_STACK */ | |
1035 | ||
ae7462b4 ACM |
1036 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
1037 | int flags) | |
f633cef0 SR |
1038 | { |
1039 | struct stack_entry *field; | |
2c9b238e | 1040 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1041 | int i; |
1042 | ||
2c9b238e | 1043 | trace_assign_type(field, iter->ent); |
f633cef0 | 1044 | |
563af16c | 1045 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1046 | goto partial; |
f633cef0 | 1047 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { |
f11b3f4e | 1048 | if (!field->caller[i] || (field->caller[i] == ULONG_MAX)) |
1ec7c484 | 1049 | break; |
f11b3f4e | 1050 | if (!trace_seq_puts(s, " => ")) |
1051 | goto partial; | |
f633cef0 | 1052 | |
f11b3f4e | 1053 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
1054 | goto partial; | |
6c1a99af | 1055 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
1056 | goto partial; |
1057 | } | |
1058 | ||
d9793bd8 | 1059 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1060 | |
1061 | partial: | |
1062 | return TRACE_TYPE_PARTIAL_LINE; | |
1063 | } | |
1064 | ||
1065 | static struct trace_event trace_stack_event = { | |
ef18012b | 1066 | .type = TRACE_STACK, |
f633cef0 | 1067 | .trace = trace_stack_print, |
f633cef0 SR |
1068 | .raw = trace_special_print, |
1069 | .hex = trace_special_hex, | |
1070 | .binary = trace_special_bin, | |
1071 | }; | |
1072 | ||
1073 | /* TRACE_USER_STACK */ | |
ae7462b4 ACM |
1074 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
1075 | int flags) | |
f633cef0 SR |
1076 | { |
1077 | struct userstack_entry *field; | |
2c9b238e | 1078 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1079 | |
2c9b238e | 1080 | trace_assign_type(field, iter->ent); |
f633cef0 | 1081 | |
563af16c | 1082 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1083 | goto partial; |
1084 | ||
048dc50c | 1085 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1086 | goto partial; |
1087 | ||
d9793bd8 | 1088 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1089 | |
1090 | partial: | |
1091 | return TRACE_TYPE_PARTIAL_LINE; | |
1092 | } | |
1093 | ||
1094 | static struct trace_event trace_user_stack_event = { | |
ef18012b | 1095 | .type = TRACE_USER_STACK, |
f633cef0 | 1096 | .trace = trace_user_stack_print, |
f633cef0 SR |
1097 | .raw = trace_special_print, |
1098 | .hex = trace_special_hex, | |
1099 | .binary = trace_special_bin, | |
1100 | }; | |
1101 | ||
48ead020 | 1102 | /* TRACE_BPRINT */ |
1427cdf0 | 1103 | static enum print_line_t |
48ead020 | 1104 | trace_bprint_print(struct trace_iterator *iter, int flags) |
1427cdf0 LJ |
1105 | { |
1106 | struct trace_entry *entry = iter->ent; | |
1107 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1108 | struct bprint_entry *field; |
1427cdf0 LJ |
1109 | |
1110 | trace_assign_type(field, entry); | |
1111 | ||
1112 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1113 | goto partial; | |
1114 | ||
1115 | if (!trace_seq_puts(s, ": ")) | |
1116 | goto partial; | |
1117 | ||
1118 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1119 | goto partial; | |
1120 | ||
1121 | return TRACE_TYPE_HANDLED; | |
1122 | ||
1123 | partial: | |
1124 | return TRACE_TYPE_PARTIAL_LINE; | |
1125 | } | |
1126 | ||
769b0441 | 1127 | |
48ead020 FW |
1128 | static enum print_line_t |
1129 | trace_bprint_raw(struct trace_iterator *iter, int flags) | |
1427cdf0 | 1130 | { |
48ead020 | 1131 | struct bprint_entry *field; |
1427cdf0 | 1132 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1133 | |
769b0441 | 1134 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1135 | |
1136 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1137 | goto partial; | |
1138 | ||
1139 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1140 | goto partial; | |
1141 | ||
1142 | return TRACE_TYPE_HANDLED; | |
1143 | ||
1144 | partial: | |
1145 | return TRACE_TYPE_PARTIAL_LINE; | |
1146 | } | |
1147 | ||
769b0441 | 1148 | |
48ead020 FW |
1149 | static struct trace_event trace_bprint_event = { |
1150 | .type = TRACE_BPRINT, | |
1151 | .trace = trace_bprint_print, | |
1152 | .raw = trace_bprint_raw, | |
1153 | }; | |
1154 | ||
1155 | /* TRACE_PRINT */ | |
1156 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
1157 | int flags) | |
1158 | { | |
1159 | struct print_entry *field; | |
1160 | struct trace_seq *s = &iter->seq; | |
1161 | ||
1162 | trace_assign_type(field, iter->ent); | |
1163 | ||
1164 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1165 | goto partial; | |
1166 | ||
1167 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1168 | goto partial; | |
1169 | ||
1170 | return TRACE_TYPE_HANDLED; | |
1171 | ||
1172 | partial: | |
1173 | return TRACE_TYPE_PARTIAL_LINE; | |
1174 | } | |
1175 | ||
1176 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags) | |
1177 | { | |
1178 | struct print_entry *field; | |
1179 | ||
1180 | trace_assign_type(field, iter->ent); | |
1181 | ||
1182 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1183 | goto partial; | |
1184 | ||
1185 | return TRACE_TYPE_HANDLED; | |
1186 | ||
1187 | partial: | |
1188 | return TRACE_TYPE_PARTIAL_LINE; | |
1189 | } | |
1190 | ||
769b0441 | 1191 | static struct trace_event trace_print_event = { |
48ead020 | 1192 | .type = TRACE_PRINT, |
769b0441 FW |
1193 | .trace = trace_print_print, |
1194 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1195 | }; |
1196 | ||
48ead020 | 1197 | |
f633cef0 SR |
1198 | static struct trace_event *events[] __initdata = { |
1199 | &trace_fn_event, | |
1200 | &trace_ctx_event, | |
1201 | &trace_wake_event, | |
1202 | &trace_special_event, | |
1203 | &trace_stack_event, | |
1204 | &trace_user_stack_event, | |
48ead020 | 1205 | &trace_bprint_event, |
f633cef0 SR |
1206 | &trace_print_event, |
1207 | NULL | |
1208 | }; | |
1209 | ||
1210 | __init static int init_events(void) | |
1211 | { | |
1212 | struct trace_event *event; | |
1213 | int i, ret; | |
1214 | ||
1215 | for (i = 0; events[i]; i++) { | |
1216 | event = events[i]; | |
1217 | ||
1218 | ret = register_ftrace_event(event); | |
1219 | if (!ret) { | |
1220 | printk(KERN_WARNING "event %d failed to register\n", | |
1221 | event->type); | |
1222 | WARN_ON_ONCE(1); | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | return 0; | |
1227 | } | |
1228 | device_initcall(init_events); |