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 | ||
52f6ad6d | 17 | DECLARE_RWSEM(trace_event_sem); |
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 | ||
09ae7234 SRRH |
23 | enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter) |
24 | { | |
25 | struct trace_seq *s = &iter->seq; | |
26 | struct trace_entry *entry = iter->ent; | |
27 | struct bputs_entry *field; | |
28 | int ret; | |
29 | ||
30 | trace_assign_type(field, entry); | |
31 | ||
32 | ret = trace_seq_puts(s, field->str); | |
33 | if (!ret) | |
34 | return TRACE_TYPE_PARTIAL_LINE; | |
35 | ||
36 | return TRACE_TYPE_HANDLED; | |
37 | } | |
38 | ||
5ef841f6 SR |
39 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
40 | { | |
41 | struct trace_seq *s = &iter->seq; | |
42 | struct trace_entry *entry = iter->ent; | |
43 | struct bprint_entry *field; | |
44 | int ret; | |
45 | ||
46 | trace_assign_type(field, entry); | |
47 | ||
48 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
49 | if (!ret) | |
50 | return TRACE_TYPE_PARTIAL_LINE; | |
51 | ||
52 | return TRACE_TYPE_HANDLED; | |
53 | } | |
54 | ||
55 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
56 | { | |
57 | struct trace_seq *s = &iter->seq; | |
58 | struct trace_entry *entry = iter->ent; | |
59 | struct print_entry *field; | |
60 | int ret; | |
61 | ||
62 | trace_assign_type(field, entry); | |
63 | ||
146c3442 | 64 | ret = trace_seq_puts(s, field->buf); |
5ef841f6 SR |
65 | if (!ret) |
66 | return TRACE_TYPE_PARTIAL_LINE; | |
67 | ||
68 | return TRACE_TYPE_HANDLED; | |
69 | } | |
70 | ||
be74b73a SR |
71 | const char * |
72 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
73 | unsigned long flags, | |
74 | const struct trace_print_flags *flag_array) | |
75 | { | |
76 | unsigned long mask; | |
77 | const char *str; | |
7b039cb4 | 78 | const char *ret = trace_seq_buffer_ptr(p); |
e404b321 | 79 | int i, first = 1; |
be74b73a | 80 | |
be74b73a SR |
81 | for (i = 0; flag_array[i].name && flags; i++) { |
82 | ||
83 | mask = flag_array[i].mask; | |
84 | if ((flags & mask) != mask) | |
85 | continue; | |
86 | ||
87 | str = flag_array[i].name; | |
88 | flags &= ~mask; | |
e404b321 | 89 | if (!first && delim) |
be74b73a | 90 | trace_seq_puts(p, delim); |
e404b321 AV |
91 | else |
92 | first = 0; | |
be74b73a SR |
93 | trace_seq_puts(p, str); |
94 | } | |
95 | ||
96 | /* check for left over flags */ | |
97 | if (flags) { | |
5b349261 | 98 | if (!first && delim) |
be74b73a SR |
99 | trace_seq_puts(p, delim); |
100 | trace_seq_printf(p, "0x%lx", flags); | |
101 | } | |
102 | ||
103 | trace_seq_putc(p, 0); | |
104 | ||
56d8bd3f | 105 | return ret; |
be74b73a | 106 | } |
ec081ddc | 107 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 108 | |
0f4fc29d SR |
109 | const char * |
110 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
111 | const struct trace_print_flags *symbol_array) | |
112 | { | |
113 | int i; | |
7b039cb4 | 114 | const char *ret = trace_seq_buffer_ptr(p); |
0f4fc29d SR |
115 | |
116 | for (i = 0; symbol_array[i].name; i++) { | |
117 | ||
118 | if (val != symbol_array[i].mask) | |
119 | continue; | |
120 | ||
121 | trace_seq_puts(p, symbol_array[i].name); | |
122 | break; | |
123 | } | |
124 | ||
7b039cb4 | 125 | if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
0f4fc29d SR |
126 | trace_seq_printf(p, "0x%lx", val); |
127 | ||
128 | trace_seq_putc(p, 0); | |
129 | ||
56d8bd3f | 130 | return ret; |
0f4fc29d | 131 | } |
ec081ddc | 132 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 133 | |
2fc1b6f0 | 134 | #if BITS_PER_LONG == 32 |
135 | const char * | |
136 | ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, | |
137 | const struct trace_print_flags_u64 *symbol_array) | |
138 | { | |
139 | int i; | |
7b039cb4 | 140 | const char *ret = trace_seq_buffer_ptr(p); |
2fc1b6f0 | 141 | |
142 | for (i = 0; symbol_array[i].name; i++) { | |
143 | ||
144 | if (val != symbol_array[i].mask) | |
145 | continue; | |
146 | ||
147 | trace_seq_puts(p, symbol_array[i].name); | |
148 | break; | |
149 | } | |
150 | ||
7b039cb4 | 151 | if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
2fc1b6f0 | 152 | trace_seq_printf(p, "0x%llx", val); |
153 | ||
154 | trace_seq_putc(p, 0); | |
155 | ||
156 | return ret; | |
157 | } | |
158 | EXPORT_SYMBOL(ftrace_print_symbols_seq_u64); | |
159 | #endif | |
160 | ||
4449bf92 SRRH |
161 | const char * |
162 | ftrace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, | |
163 | unsigned int bitmask_size) | |
164 | { | |
7b039cb4 | 165 | const char *ret = trace_seq_buffer_ptr(p); |
4449bf92 SRRH |
166 | |
167 | trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8); | |
168 | trace_seq_putc(p, 0); | |
169 | ||
170 | return ret; | |
171 | } | |
172 | EXPORT_SYMBOL_GPL(ftrace_print_bitmask_seq); | |
173 | ||
5a2e3995 KT |
174 | const char * |
175 | ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) | |
176 | { | |
177 | int i; | |
7b039cb4 | 178 | const char *ret = trace_seq_buffer_ptr(p); |
5a2e3995 KT |
179 | |
180 | for (i = 0; i < buf_len; i++) | |
181 | trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]); | |
182 | ||
183 | trace_seq_putc(p, 0); | |
184 | ||
185 | return ret; | |
186 | } | |
187 | EXPORT_SYMBOL(ftrace_print_hex_seq); | |
188 | ||
f71130de LZ |
189 | int ftrace_raw_output_prep(struct trace_iterator *iter, |
190 | struct trace_event *trace_event) | |
191 | { | |
192 | struct ftrace_event_call *event; | |
193 | struct trace_seq *s = &iter->seq; | |
194 | struct trace_seq *p = &iter->tmp_seq; | |
195 | struct trace_entry *entry; | |
196 | int ret; | |
197 | ||
198 | event = container_of(trace_event, struct ftrace_event_call, event); | |
199 | entry = iter->ent; | |
200 | ||
201 | if (entry->type != event->event.type) { | |
202 | WARN_ON_ONCE(1); | |
203 | return TRACE_TYPE_UNHANDLED; | |
204 | } | |
205 | ||
206 | trace_seq_init(p); | |
de7b2973 | 207 | ret = trace_seq_printf(s, "%s: ", ftrace_event_name(event)); |
f71130de LZ |
208 | if (!ret) |
209 | return TRACE_TYPE_PARTIAL_LINE; | |
210 | ||
211 | return 0; | |
212 | } | |
213 | EXPORT_SYMBOL(ftrace_raw_output_prep); | |
214 | ||
1d6bae96 SR |
215 | static int ftrace_output_raw(struct trace_iterator *iter, char *name, |
216 | char *fmt, va_list ap) | |
217 | { | |
218 | struct trace_seq *s = &iter->seq; | |
219 | int ret; | |
220 | ||
221 | ret = trace_seq_printf(s, "%s: ", name); | |
222 | if (!ret) | |
223 | return TRACE_TYPE_PARTIAL_LINE; | |
224 | ||
225 | ret = trace_seq_vprintf(s, fmt, ap); | |
226 | ||
227 | if (!ret) | |
228 | return TRACE_TYPE_PARTIAL_LINE; | |
229 | ||
230 | return TRACE_TYPE_HANDLED; | |
231 | } | |
232 | ||
233 | int ftrace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...) | |
234 | { | |
235 | va_list ap; | |
236 | int ret; | |
237 | ||
238 | va_start(ap, fmt); | |
239 | ret = ftrace_output_raw(iter, name, fmt, ap); | |
240 | va_end(ap); | |
241 | ||
242 | return ret; | |
243 | } | |
244 | EXPORT_SYMBOL_GPL(ftrace_output_call); | |
245 | ||
f0868d1e SR |
246 | #ifdef CONFIG_KRETPROBES |
247 | static inline const char *kretprobed(const char *name) | |
248 | { | |
249 | static const char tramp_name[] = "kretprobe_trampoline"; | |
250 | int size = sizeof(tramp_name); | |
251 | ||
252 | if (strncmp(tramp_name, name, size) == 0) | |
253 | return "[unknown/kretprobe'd]"; | |
254 | return name; | |
255 | } | |
256 | #else | |
257 | static inline const char *kretprobed(const char *name) | |
258 | { | |
259 | return name; | |
260 | } | |
261 | #endif /* CONFIG_KRETPROBES */ | |
262 | ||
263 | static int | |
264 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
265 | { | |
266 | #ifdef CONFIG_KALLSYMS | |
267 | char str[KSYM_SYMBOL_LEN]; | |
268 | const char *name; | |
269 | ||
270 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
271 | ||
272 | name = kretprobed(str); | |
273 | ||
274 | return trace_seq_printf(s, fmt, name); | |
275 | #endif | |
276 | return 1; | |
277 | } | |
278 | ||
279 | static int | |
280 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
281 | unsigned long address) | |
282 | { | |
283 | #ifdef CONFIG_KALLSYMS | |
284 | char str[KSYM_SYMBOL_LEN]; | |
285 | const char *name; | |
286 | ||
287 | sprint_symbol(str, address); | |
288 | name = kretprobed(str); | |
289 | ||
290 | return trace_seq_printf(s, fmt, name); | |
291 | #endif | |
292 | return 1; | |
293 | } | |
294 | ||
295 | #ifndef CONFIG_64BIT | |
296 | # define IP_FMT "%08lx" | |
297 | #else | |
298 | # define IP_FMT "%016lx" | |
299 | #endif | |
300 | ||
301 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
302 | unsigned long ip, unsigned long sym_flags) | |
303 | { | |
304 | struct file *file = NULL; | |
305 | unsigned long vmstart = 0; | |
306 | int ret = 1; | |
307 | ||
d184b31c JB |
308 | if (s->full) |
309 | return 0; | |
310 | ||
f0868d1e SR |
311 | if (mm) { |
312 | const struct vm_area_struct *vma; | |
313 | ||
314 | down_read(&mm->mmap_sem); | |
315 | vma = find_vma(mm, ip); | |
316 | if (vma) { | |
317 | file = vma->vm_file; | |
318 | vmstart = vma->vm_start; | |
319 | } | |
320 | if (file) { | |
321 | ret = trace_seq_path(s, &file->f_path); | |
322 | if (ret) | |
323 | ret = trace_seq_printf(s, "[+0x%lx]", | |
324 | ip - vmstart); | |
325 | } | |
326 | up_read(&mm->mmap_sem); | |
327 | } | |
328 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
329 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
330 | return ret; | |
331 | } | |
332 | ||
333 | int | |
334 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
335 | unsigned long sym_flags) | |
336 | { | |
337 | struct mm_struct *mm = NULL; | |
338 | int ret = 1; | |
339 | unsigned int i; | |
340 | ||
341 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
342 | struct task_struct *task; | |
343 | /* | |
344 | * we do the lookup on the thread group leader, | |
345 | * since individual threads might have already quit! | |
346 | */ | |
347 | rcu_read_lock(); | |
48659d31 | 348 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
349 | if (task) |
350 | mm = get_task_mm(task); | |
351 | rcu_read_unlock(); | |
352 | } | |
353 | ||
354 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
355 | unsigned long ip = entry->caller[i]; | |
356 | ||
357 | if (ip == ULONG_MAX || !ret) | |
358 | break; | |
048dc50c | 359 | if (ret) |
360 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
361 | if (!ip) { |
362 | if (ret) | |
363 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 364 | if (ret) |
146c3442 | 365 | ret = trace_seq_putc(s, '\n'); |
f0868d1e SR |
366 | continue; |
367 | } | |
368 | if (!ret) | |
369 | break; | |
370 | if (ret) | |
371 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
146c3442 | 372 | ret = trace_seq_putc(s, '\n'); |
f0868d1e SR |
373 | } |
374 | ||
375 | if (mm) | |
376 | mmput(mm); | |
377 | return ret; | |
378 | } | |
379 | ||
380 | int | |
381 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
382 | { | |
383 | int ret; | |
384 | ||
385 | if (!ip) | |
146c3442 | 386 | return trace_seq_putc(s, '0'); |
f0868d1e SR |
387 | |
388 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
389 | ret = seq_print_sym_offset(s, "%s", ip); | |
390 | else | |
391 | ret = seq_print_sym_short(s, "%s", ip); | |
392 | ||
393 | if (!ret) | |
394 | return 0; | |
395 | ||
396 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
397 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
398 | return ret; | |
399 | } | |
400 | ||
f81c972d SR |
401 | /** |
402 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
403 | * @s: trace seq struct to write to | |
404 | * @entry: The trace entry field from the ring buffer | |
405 | * | |
406 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 407 | * count. |
f81c972d SR |
408 | */ |
409 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 410 | { |
10da37a6 DS |
411 | char hardsoft_irq; |
412 | char need_resched; | |
413 | char irqs_off; | |
414 | int hardirq; | |
415 | int softirq; | |
637e7e86 | 416 | int ret; |
c4a8e8be | 417 | |
c4a8e8be FW |
418 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
419 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 420 | |
10da37a6 DS |
421 | irqs_off = |
422 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
423 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
424 | '.'; | |
e5137b50 PZ |
425 | |
426 | switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | | |
427 | TRACE_FLAG_PREEMPT_RESCHED)) { | |
428 | case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: | |
429 | need_resched = 'N'; | |
430 | break; | |
431 | case TRACE_FLAG_NEED_RESCHED: | |
432 | need_resched = 'n'; | |
433 | break; | |
434 | case TRACE_FLAG_PREEMPT_RESCHED: | |
435 | need_resched = 'p'; | |
436 | break; | |
437 | default: | |
438 | need_resched = '.'; | |
439 | break; | |
440 | } | |
441 | ||
10da37a6 DS |
442 | hardsoft_irq = |
443 | (hardirq && softirq) ? 'H' : | |
444 | hardirq ? 'h' : | |
445 | softirq ? 's' : | |
446 | '.'; | |
447 | ||
f81c972d | 448 | if (!trace_seq_printf(s, "%c%c%c", |
10da37a6 | 449 | irqs_off, need_resched, hardsoft_irq)) |
d9793bd8 | 450 | return 0; |
c4a8e8be | 451 | |
829b876d SR |
452 | if (entry->preempt_count) |
453 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 454 | else |
829b876d SR |
455 | ret = trace_seq_putc(s, '.'); |
456 | ||
e6e1e259 | 457 | return ret; |
c4a8e8be FW |
458 | } |
459 | ||
f81c972d SR |
460 | static int |
461 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
462 | { | |
463 | char comm[TASK_COMM_LEN]; | |
464 | ||
465 | trace_find_cmdline(entry->pid, comm); | |
466 | ||
467 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
468 | comm, entry->pid, cpu)) | |
469 | return 0; | |
470 | ||
471 | return trace_print_lat_fmt(s, entry); | |
472 | } | |
473 | ||
8be0709f | 474 | static unsigned long preempt_mark_thresh_us = 100; |
c4a8e8be | 475 | |
d9793bd8 | 476 | static int |
8be0709f | 477 | lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
c4a8e8be | 478 | { |
8be0709f DS |
479 | unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE; |
480 | unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; | |
12883efb | 481 | unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start; |
8be0709f DS |
482 | unsigned long long rel_ts = next_ts - iter->ts; |
483 | struct trace_seq *s = &iter->seq; | |
484 | ||
485 | if (in_ns) { | |
486 | abs_ts = ns2usecs(abs_ts); | |
487 | rel_ts = ns2usecs(rel_ts); | |
488 | } | |
489 | ||
490 | if (verbose && in_ns) { | |
491 | unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); | |
492 | unsigned long abs_msec = (unsigned long)abs_ts; | |
493 | unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); | |
494 | unsigned long rel_msec = (unsigned long)rel_ts; | |
495 | ||
496 | return trace_seq_printf( | |
497 | s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", | |
498 | ns2usecs(iter->ts), | |
499 | abs_msec, abs_usec, | |
500 | rel_msec, rel_usec); | |
501 | } else if (verbose && !in_ns) { | |
502 | return trace_seq_printf( | |
503 | s, "[%016llx] %lld (+%lld): ", | |
504 | iter->ts, abs_ts, rel_ts); | |
505 | } else if (!verbose && in_ns) { | |
506 | return trace_seq_printf( | |
507 | s, " %4lldus%c: ", | |
508 | abs_ts, | |
509 | rel_ts > preempt_mark_thresh_us ? '!' : | |
510 | rel_ts > 1 ? '+' : ' '); | |
511 | } else { /* !verbose && !in_ns */ | |
512 | return trace_seq_printf(s, " %4lld: ", abs_ts); | |
513 | } | |
c4a8e8be FW |
514 | } |
515 | ||
516 | int trace_print_context(struct trace_iterator *iter) | |
517 | { | |
518 | struct trace_seq *s = &iter->seq; | |
519 | struct trace_entry *entry = iter->ent; | |
8be0709f DS |
520 | unsigned long long t; |
521 | unsigned long secs, usec_rem; | |
4ca53085 | 522 | char comm[TASK_COMM_LEN]; |
77271ce4 | 523 | int ret; |
4ca53085 SR |
524 | |
525 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 526 | |
77271ce4 SR |
527 | ret = trace_seq_printf(s, "%16s-%-5d [%03d] ", |
528 | comm, entry->pid, iter->cpu); | |
529 | if (!ret) | |
530 | return 0; | |
531 | ||
532 | if (trace_flags & TRACE_ITER_IRQ_INFO) { | |
533 | ret = trace_print_lat_fmt(s, entry); | |
534 | if (!ret) | |
535 | return 0; | |
536 | } | |
537 | ||
8be0709f DS |
538 | if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { |
539 | t = ns2usecs(iter->ts); | |
540 | usec_rem = do_div(t, USEC_PER_SEC); | |
541 | secs = (unsigned long)t; | |
542 | return trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); | |
543 | } else | |
544 | return trace_seq_printf(s, " %12llu: ", iter->ts); | |
c4a8e8be FW |
545 | } |
546 | ||
547 | int trace_print_lat_context(struct trace_iterator *iter) | |
548 | { | |
549 | u64 next_ts; | |
d9793bd8 | 550 | int ret; |
db4c75cb SR |
551 | /* trace_find_next_entry will reset ent_size */ |
552 | int ent_size = iter->ent_size; | |
c4a8e8be FW |
553 | struct trace_seq *s = &iter->seq; |
554 | struct trace_entry *entry = iter->ent, | |
555 | *next_entry = trace_find_next_entry(iter, NULL, | |
556 | &next_ts); | |
557 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
c4a8e8be | 558 | |
db4c75cb SR |
559 | /* Restore the original ent_size */ |
560 | iter->ent_size = ent_size; | |
561 | ||
c4a8e8be FW |
562 | if (!next_entry) |
563 | next_ts = iter->ts; | |
c4a8e8be FW |
564 | |
565 | if (verbose) { | |
4ca53085 SR |
566 | char comm[TASK_COMM_LEN]; |
567 | ||
568 | trace_find_cmdline(entry->pid, comm); | |
569 | ||
8be0709f DS |
570 | ret = trace_seq_printf( |
571 | s, "%16s %5d %3d %d %08x %08lx ", | |
572 | comm, entry->pid, iter->cpu, entry->flags, | |
573 | entry->preempt_count, iter->idx); | |
c4a8e8be | 574 | } else { |
1830b52d | 575 | ret = lat_print_generic(s, entry, iter->cpu); |
c4a8e8be FW |
576 | } |
577 | ||
8be0709f DS |
578 | if (ret) |
579 | ret = lat_print_timestamp(iter, next_ts); | |
580 | ||
d9793bd8 | 581 | return ret; |
c4a8e8be FW |
582 | } |
583 | ||
f633cef0 SR |
584 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
585 | ||
586 | static int task_state_char(unsigned long state) | |
587 | { | |
588 | int bit = state ? __ffs(state) + 1 : 0; | |
589 | ||
590 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
591 | } | |
592 | ||
f0868d1e SR |
593 | /** |
594 | * ftrace_find_event - find a registered event | |
595 | * @type: the type of event to look for | |
596 | * | |
597 | * Returns an event of type @type otherwise NULL | |
4f535968 | 598 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
599 | */ |
600 | struct trace_event *ftrace_find_event(int type) | |
601 | { | |
602 | struct trace_event *event; | |
f0868d1e SR |
603 | unsigned key; |
604 | ||
605 | key = type & (EVENT_HASHSIZE - 1); | |
606 | ||
b67bfe0d | 607 | hlist_for_each_entry(event, &event_hash[key], node) { |
f0868d1e SR |
608 | if (event->type == type) |
609 | return event; | |
610 | } | |
611 | ||
612 | return NULL; | |
613 | } | |
614 | ||
060fa5c8 SR |
615 | static LIST_HEAD(ftrace_event_list); |
616 | ||
617 | static int trace_search_list(struct list_head **list) | |
618 | { | |
619 | struct trace_event *e; | |
620 | int last = __TRACE_LAST_TYPE; | |
621 | ||
622 | if (list_empty(&ftrace_event_list)) { | |
623 | *list = &ftrace_event_list; | |
624 | return last + 1; | |
625 | } | |
626 | ||
627 | /* | |
628 | * We used up all possible max events, | |
629 | * lets see if somebody freed one. | |
630 | */ | |
631 | list_for_each_entry(e, &ftrace_event_list, list) { | |
632 | if (e->type != last + 1) | |
633 | break; | |
634 | last++; | |
635 | } | |
636 | ||
637 | /* Did we used up all 65 thousand events??? */ | |
638 | if ((last + 1) > FTRACE_MAX_EVENT) | |
639 | return 0; | |
640 | ||
641 | *list = &e->list; | |
642 | return last + 1; | |
643 | } | |
644 | ||
4f535968 LJ |
645 | void trace_event_read_lock(void) |
646 | { | |
52f6ad6d | 647 | down_read(&trace_event_sem); |
4f535968 LJ |
648 | } |
649 | ||
650 | void trace_event_read_unlock(void) | |
651 | { | |
52f6ad6d | 652 | up_read(&trace_event_sem); |
4f535968 LJ |
653 | } |
654 | ||
f0868d1e SR |
655 | /** |
656 | * register_ftrace_event - register output for an event type | |
657 | * @event: the event type to register | |
658 | * | |
659 | * Event types are stored in a hash and this hash is used to | |
660 | * find a way to print an event. If the @event->type is set | |
661 | * then it will use that type, otherwise it will assign a | |
662 | * type to use. | |
663 | * | |
664 | * If you assign your own type, please make sure it is added | |
665 | * to the trace_type enum in trace.h, to avoid collisions | |
666 | * with the dynamic types. | |
667 | * | |
668 | * Returns the event type number or zero on error. | |
669 | */ | |
670 | int register_ftrace_event(struct trace_event *event) | |
671 | { | |
672 | unsigned key; | |
673 | int ret = 0; | |
674 | ||
52f6ad6d | 675 | down_write(&trace_event_sem); |
f0868d1e | 676 | |
060fa5c8 | 677 | if (WARN_ON(!event)) |
28bea271 | 678 | goto out; |
28bea271 | 679 | |
a9a57763 SR |
680 | if (WARN_ON(!event->funcs)) |
681 | goto out; | |
682 | ||
060fa5c8 SR |
683 | INIT_LIST_HEAD(&event->list); |
684 | ||
685 | if (!event->type) { | |
48dd0fed | 686 | struct list_head *list = NULL; |
060fa5c8 SR |
687 | |
688 | if (next_event_type > FTRACE_MAX_EVENT) { | |
689 | ||
690 | event->type = trace_search_list(&list); | |
691 | if (!event->type) | |
692 | goto out; | |
693 | ||
694 | } else { | |
695 | ||
696 | event->type = next_event_type++; | |
697 | list = &ftrace_event_list; | |
698 | } | |
699 | ||
700 | if (WARN_ON(ftrace_find_event(event->type))) | |
701 | goto out; | |
702 | ||
703 | list_add_tail(&event->list, list); | |
704 | ||
705 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
706 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
707 | WARN_ON(1); | |
f0868d1e | 708 | goto out; |
060fa5c8 SR |
709 | } else { |
710 | /* Is this event already used */ | |
711 | if (ftrace_find_event(event->type)) | |
712 | goto out; | |
713 | } | |
f0868d1e | 714 | |
a9a57763 SR |
715 | if (event->funcs->trace == NULL) |
716 | event->funcs->trace = trace_nop_print; | |
717 | if (event->funcs->raw == NULL) | |
718 | event->funcs->raw = trace_nop_print; | |
719 | if (event->funcs->hex == NULL) | |
720 | event->funcs->hex = trace_nop_print; | |
721 | if (event->funcs->binary == NULL) | |
722 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 723 | |
f0868d1e SR |
724 | key = event->type & (EVENT_HASHSIZE - 1); |
725 | ||
4f535968 | 726 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
727 | |
728 | ret = event->type; | |
729 | out: | |
52f6ad6d | 730 | up_write(&trace_event_sem); |
f0868d1e SR |
731 | |
732 | return ret; | |
733 | } | |
17c873ec | 734 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 735 | |
110bf2b7 | 736 | /* |
52f6ad6d | 737 | * Used by module code with the trace_event_sem held for write. |
110bf2b7 SR |
738 | */ |
739 | int __unregister_ftrace_event(struct trace_event *event) | |
740 | { | |
741 | hlist_del(&event->node); | |
742 | list_del(&event->list); | |
743 | return 0; | |
744 | } | |
745 | ||
f0868d1e SR |
746 | /** |
747 | * unregister_ftrace_event - remove a no longer used event | |
748 | * @event: the event to remove | |
749 | */ | |
750 | int unregister_ftrace_event(struct trace_event *event) | |
751 | { | |
52f6ad6d | 752 | down_write(&trace_event_sem); |
110bf2b7 | 753 | __unregister_ftrace_event(event); |
52f6ad6d | 754 | up_write(&trace_event_sem); |
f0868d1e SR |
755 | |
756 | return 0; | |
757 | } | |
17c873ec | 758 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
759 | |
760 | /* | |
761 | * Standard events | |
762 | */ | |
763 | ||
a9a57763 SR |
764 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
765 | struct trace_event *event) | |
f633cef0 | 766 | { |
ee5e51f5 JO |
767 | if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type)) |
768 | return TRACE_TYPE_PARTIAL_LINE; | |
769 | ||
d9793bd8 | 770 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
771 | } |
772 | ||
773 | /* TRACE_FN */ | |
a9a57763 SR |
774 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
775 | struct trace_event *event) | |
f633cef0 SR |
776 | { |
777 | struct ftrace_entry *field; | |
2c9b238e | 778 | struct trace_seq *s = &iter->seq; |
f633cef0 | 779 | |
2c9b238e | 780 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
781 | |
782 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
783 | goto partial; | |
784 | ||
785 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
146c3442 | 786 | if (!trace_seq_puts(s, " <-")) |
f633cef0 SR |
787 | goto partial; |
788 | if (!seq_print_ip_sym(s, | |
789 | field->parent_ip, | |
790 | flags)) | |
791 | goto partial; | |
792 | } | |
146c3442 | 793 | if (!trace_seq_putc(s, '\n')) |
f633cef0 SR |
794 | goto partial; |
795 | ||
d9793bd8 | 796 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
797 | |
798 | partial: | |
799 | return TRACE_TYPE_PARTIAL_LINE; | |
800 | } | |
801 | ||
a9a57763 SR |
802 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
803 | struct trace_event *event) | |
f633cef0 SR |
804 | { |
805 | struct ftrace_entry *field; | |
806 | ||
2c9b238e | 807 | trace_assign_type(field, iter->ent); |
f633cef0 | 808 | |
2c9b238e | 809 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
810 | field->ip, |
811 | field->parent_ip)) | |
f633cef0 SR |
812 | return TRACE_TYPE_PARTIAL_LINE; |
813 | ||
d9793bd8 | 814 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
815 | } |
816 | ||
a9a57763 SR |
817 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
818 | struct trace_event *event) | |
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_HEX_FIELD_RET(s, field->ip); | |
826 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
827 | ||
d9793bd8 | 828 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
829 | } |
830 | ||
a9a57763 SR |
831 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
832 | struct trace_event *event) | |
f633cef0 SR |
833 | { |
834 | struct ftrace_entry *field; | |
2c9b238e | 835 | struct trace_seq *s = &iter->seq; |
f633cef0 | 836 | |
2c9b238e | 837 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
838 | |
839 | SEQ_PUT_FIELD_RET(s, field->ip); | |
840 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
841 | ||
d9793bd8 | 842 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
843 | } |
844 | ||
a9a57763 | 845 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 846 | .trace = trace_fn_trace, |
f633cef0 SR |
847 | .raw = trace_fn_raw, |
848 | .hex = trace_fn_hex, | |
849 | .binary = trace_fn_bin, | |
850 | }; | |
851 | ||
a9a57763 SR |
852 | static struct trace_event trace_fn_event = { |
853 | .type = TRACE_FN, | |
854 | .funcs = &trace_fn_funcs, | |
855 | }; | |
856 | ||
f633cef0 | 857 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
858 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
859 | char *delim) | |
f633cef0 SR |
860 | { |
861 | struct ctx_switch_entry *field; | |
4ca53085 | 862 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
863 | int S, T; |
864 | ||
4ca53085 | 865 | |
2c9b238e | 866 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
867 | |
868 | T = task_state_char(field->next_state); | |
869 | S = task_state_char(field->prev_state); | |
4ca53085 | 870 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
871 | if (!trace_seq_printf(&iter->seq, |
872 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
873 | field->prev_pid, |
874 | field->prev_prio, | |
875 | S, delim, | |
876 | field->next_cpu, | |
877 | field->next_pid, | |
878 | field->next_prio, | |
879 | T, comm)) | |
f633cef0 SR |
880 | return TRACE_TYPE_PARTIAL_LINE; |
881 | ||
d9793bd8 | 882 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
883 | } |
884 | ||
a9a57763 SR |
885 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
886 | struct trace_event *event) | |
f633cef0 | 887 | { |
2c9b238e | 888 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
889 | } |
890 | ||
ae7462b4 | 891 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 892 | int flags, struct trace_event *event) |
f633cef0 | 893 | { |
2c9b238e | 894 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
895 | } |
896 | ||
2c9b238e | 897 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
898 | { |
899 | struct ctx_switch_entry *field; | |
900 | int T; | |
901 | ||
2c9b238e | 902 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
903 | |
904 | if (!S) | |
b0f56f1a | 905 | S = task_state_char(field->prev_state); |
f633cef0 | 906 | T = task_state_char(field->next_state); |
2c9b238e | 907 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
908 | field->prev_pid, |
909 | field->prev_prio, | |
910 | S, | |
911 | field->next_cpu, | |
912 | field->next_pid, | |
913 | field->next_prio, | |
914 | T)) | |
f633cef0 SR |
915 | return TRACE_TYPE_PARTIAL_LINE; |
916 | ||
d9793bd8 | 917 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
918 | } |
919 | ||
a9a57763 SR |
920 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
921 | struct trace_event *event) | |
f633cef0 | 922 | { |
2c9b238e | 923 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
924 | } |
925 | ||
a9a57763 SR |
926 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
927 | struct trace_event *event) | |
f633cef0 | 928 | { |
2c9b238e | 929 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
930 | } |
931 | ||
932 | ||
2c9b238e | 933 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
934 | { |
935 | struct ctx_switch_entry *field; | |
2c9b238e | 936 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
937 | int T; |
938 | ||
2c9b238e | 939 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
940 | |
941 | if (!S) | |
b0f56f1a | 942 | S = task_state_char(field->prev_state); |
f633cef0 SR |
943 | T = task_state_char(field->next_state); |
944 | ||
945 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
946 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
947 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
948 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
949 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
950 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
951 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
952 | ||
d9793bd8 | 953 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
954 | } |
955 | ||
a9a57763 SR |
956 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
957 | struct trace_event *event) | |
f633cef0 | 958 | { |
2c9b238e | 959 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
960 | } |
961 | ||
a9a57763 SR |
962 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
963 | struct trace_event *event) | |
f633cef0 | 964 | { |
2c9b238e | 965 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
966 | } |
967 | ||
ae7462b4 | 968 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 969 | int flags, struct trace_event *event) |
f633cef0 SR |
970 | { |
971 | struct ctx_switch_entry *field; | |
2c9b238e | 972 | struct trace_seq *s = &iter->seq; |
f633cef0 | 973 | |
2c9b238e | 974 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
975 | |
976 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
977 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
978 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
979 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
980 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
981 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
982 | ||
d9793bd8 | 983 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
984 | } |
985 | ||
a9a57763 | 986 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 987 | .trace = trace_ctx_print, |
f633cef0 SR |
988 | .raw = trace_ctx_raw, |
989 | .hex = trace_ctx_hex, | |
990 | .binary = trace_ctxwake_bin, | |
991 | }; | |
992 | ||
a9a57763 SR |
993 | static struct trace_event trace_ctx_event = { |
994 | .type = TRACE_CTX, | |
995 | .funcs = &trace_ctx_funcs, | |
996 | }; | |
997 | ||
998 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 999 | .trace = trace_wake_print, |
f633cef0 SR |
1000 | .raw = trace_wake_raw, |
1001 | .hex = trace_wake_hex, | |
1002 | .binary = trace_ctxwake_bin, | |
1003 | }; | |
1004 | ||
a9a57763 SR |
1005 | static struct trace_event trace_wake_event = { |
1006 | .type = TRACE_WAKE, | |
1007 | .funcs = &trace_wake_funcs, | |
1008 | }; | |
1009 | ||
f633cef0 SR |
1010 | /* TRACE_STACK */ |
1011 | ||
ae7462b4 | 1012 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1013 | int flags, struct trace_event *event) |
f633cef0 SR |
1014 | { |
1015 | struct stack_entry *field; | |
2c9b238e | 1016 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1017 | unsigned long *p; |
1018 | unsigned long *end; | |
f633cef0 | 1019 | |
2c9b238e | 1020 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1021 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1022 | |
563af16c | 1023 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1024 | goto partial; |
4a9bd3f1 SR |
1025 | |
1026 | for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { | |
f11b3f4e | 1027 | if (!trace_seq_puts(s, " => ")) |
1028 | goto partial; | |
f633cef0 | 1029 | |
4a9bd3f1 | 1030 | if (!seq_print_ip_sym(s, *p, flags)) |
f11b3f4e | 1031 | goto partial; |
146c3442 | 1032 | if (!trace_seq_putc(s, '\n')) |
f633cef0 SR |
1033 | goto partial; |
1034 | } | |
1035 | ||
d9793bd8 | 1036 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1037 | |
1038 | partial: | |
1039 | return TRACE_TYPE_PARTIAL_LINE; | |
1040 | } | |
1041 | ||
a9a57763 | 1042 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1043 | .trace = trace_stack_print, |
f633cef0 SR |
1044 | }; |
1045 | ||
a9a57763 SR |
1046 | static struct trace_event trace_stack_event = { |
1047 | .type = TRACE_STACK, | |
1048 | .funcs = &trace_stack_funcs, | |
1049 | }; | |
1050 | ||
f633cef0 | 1051 | /* TRACE_USER_STACK */ |
ae7462b4 | 1052 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1053 | int flags, struct trace_event *event) |
f633cef0 SR |
1054 | { |
1055 | struct userstack_entry *field; | |
2c9b238e | 1056 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1057 | |
2c9b238e | 1058 | trace_assign_type(field, iter->ent); |
f633cef0 | 1059 | |
563af16c | 1060 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1061 | goto partial; |
1062 | ||
048dc50c | 1063 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1064 | goto partial; |
1065 | ||
d9793bd8 | 1066 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1067 | |
1068 | partial: | |
1069 | return TRACE_TYPE_PARTIAL_LINE; | |
1070 | } | |
1071 | ||
a9a57763 | 1072 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1073 | .trace = trace_user_stack_print, |
f633cef0 SR |
1074 | }; |
1075 | ||
a9a57763 SR |
1076 | static struct trace_event trace_user_stack_event = { |
1077 | .type = TRACE_USER_STACK, | |
1078 | .funcs = &trace_user_stack_funcs, | |
1079 | }; | |
1080 | ||
09ae7234 SRRH |
1081 | /* TRACE_BPUTS */ |
1082 | static enum print_line_t | |
1083 | trace_bputs_print(struct trace_iterator *iter, int flags, | |
1084 | struct trace_event *event) | |
1085 | { | |
1086 | struct trace_entry *entry = iter->ent; | |
1087 | struct trace_seq *s = &iter->seq; | |
1088 | struct bputs_entry *field; | |
1089 | ||
1090 | trace_assign_type(field, entry); | |
1091 | ||
1092 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1093 | goto partial; | |
1094 | ||
1095 | if (!trace_seq_puts(s, ": ")) | |
1096 | goto partial; | |
1097 | ||
1098 | if (!trace_seq_puts(s, field->str)) | |
1099 | goto partial; | |
1100 | ||
1101 | return TRACE_TYPE_HANDLED; | |
1102 | ||
1103 | partial: | |
1104 | return TRACE_TYPE_PARTIAL_LINE; | |
1105 | } | |
1106 | ||
1107 | ||
1108 | static enum print_line_t | |
1109 | trace_bputs_raw(struct trace_iterator *iter, int flags, | |
1110 | struct trace_event *event) | |
1111 | { | |
1112 | struct bputs_entry *field; | |
1113 | struct trace_seq *s = &iter->seq; | |
1114 | ||
1115 | trace_assign_type(field, iter->ent); | |
1116 | ||
1117 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1118 | goto partial; | |
1119 | ||
1120 | if (!trace_seq_puts(s, field->str)) | |
1121 | goto partial; | |
1122 | ||
1123 | return TRACE_TYPE_HANDLED; | |
1124 | ||
1125 | partial: | |
1126 | return TRACE_TYPE_PARTIAL_LINE; | |
1127 | } | |
1128 | ||
1129 | static struct trace_event_functions trace_bputs_funcs = { | |
1130 | .trace = trace_bputs_print, | |
1131 | .raw = trace_bputs_raw, | |
1132 | }; | |
1133 | ||
1134 | static struct trace_event trace_bputs_event = { | |
1135 | .type = TRACE_BPUTS, | |
1136 | .funcs = &trace_bputs_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, | |
09ae7234 | 1251 | &trace_bputs_event, |
48ead020 | 1252 | &trace_bprint_event, |
f633cef0 SR |
1253 | &trace_print_event, |
1254 | NULL | |
1255 | }; | |
1256 | ||
1257 | __init static int init_events(void) | |
1258 | { | |
1259 | struct trace_event *event; | |
1260 | int i, ret; | |
1261 | ||
1262 | for (i = 0; events[i]; i++) { | |
1263 | event = events[i]; | |
1264 | ||
1265 | ret = register_ftrace_event(event); | |
1266 | if (!ret) { | |
1267 | printk(KERN_WARNING "event %d failed to register\n", | |
1268 | event->type); | |
1269 | WARN_ON_ONCE(1); | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | return 0; | |
1274 | } | |
7374e827 | 1275 | early_initcall(init_events); |