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Steven Rostedtf0868d12008-12-23 23:24:12 -05001/*
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
Steven Rostedt110bf2b2009-06-09 17:29:07 -040017DECLARE_RWSEM(trace_event_mutex);
Steven Rostedtbe74b732009-05-26 20:25:22 +020018
Steven Rostedtf0868d12008-12-23 23:24:12 -050019static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
20
21static int next_event_type = __TRACE_LAST_TYPE + 1;
22
Steven Rostedta63ce5b2009-12-07 09:11:39 -050023int trace_print_seq(struct seq_file *m, struct trace_seq *s)
Steven Rostedt0706f1c2009-03-23 23:12:58 -040024{
25 int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
Steven Rostedta63ce5b2009-12-07 09:11:39 -050026 int ret;
Steven Rostedt0706f1c2009-03-23 23:12:58 -040027
Steven Rostedta63ce5b2009-12-07 09:11:39 -050028 ret = seq_write(m, s->buffer, len);
Steven Rostedt0706f1c2009-03-23 23:12:58 -040029
Steven Rostedta63ce5b2009-12-07 09:11:39 -050030 /*
31 * Only reset this buffer if we successfully wrote to the
32 * seq_file buffer.
33 */
34 if (!ret)
35 trace_seq_init(s);
36
37 return ret;
Steven Rostedt0706f1c2009-03-23 23:12:58 -040038}
39
Steven Rostedt5ef841f2009-03-19 12:20:38 -040040enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
41{
42 struct trace_seq *s = &iter->seq;
43 struct trace_entry *entry = iter->ent;
44 struct bprint_entry *field;
45 int ret;
46
47 trace_assign_type(field, entry);
48
49 ret = trace_seq_bprintf(s, field->fmt, field->buf);
50 if (!ret)
51 return TRACE_TYPE_PARTIAL_LINE;
52
53 return TRACE_TYPE_HANDLED;
54}
55
56enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
57{
58 struct trace_seq *s = &iter->seq;
59 struct trace_entry *entry = iter->ent;
60 struct print_entry *field;
61 int ret;
62
63 trace_assign_type(field, entry);
64
65 ret = trace_seq_printf(s, "%s", field->buf);
66 if (!ret)
67 return TRACE_TYPE_PARTIAL_LINE;
68
69 return TRACE_TYPE_HANDLED;
70}
71
Steven Rostedtf0868d12008-12-23 23:24:12 -050072/**
73 * trace_seq_printf - sequence printing of trace information
74 * @s: trace sequence descriptor
75 * @fmt: printf format string
76 *
Jiri Olsa3e695332009-10-23 19:36:17 -040077 * It returns 0 if the trace oversizes the buffer's free
78 * space, 1 otherwise.
79 *
Steven Rostedtf0868d12008-12-23 23:24:12 -050080 * The tracer may use either sequence operations or its own
81 * copy to user routines. To simplify formating of a trace
82 * trace_seq_printf is used to store strings into a special
83 * buffer (@s). Then the output may be either used by
84 * the sequencer or pulled into another buffer.
85 */
86int
87trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
88{
89 int len = (PAGE_SIZE - 1) - s->len;
90 va_list ap;
91 int ret;
92
Johannes Bergd184b312009-11-25 16:10:14 +010093 if (s->full || !len)
Steven Rostedtf0868d12008-12-23 23:24:12 -050094 return 0;
95
96 va_start(ap, fmt);
97 ret = vsnprintf(s->buffer + s->len, len, fmt, ap);
98 va_end(ap);
99
100 /* If we can't write it all, don't bother writing anything */
Johannes Bergd184b312009-11-25 16:10:14 +0100101 if (ret >= len) {
102 s->full = 1;
Steven Rostedtf0868d12008-12-23 23:24:12 -0500103 return 0;
Johannes Bergd184b312009-11-25 16:10:14 +0100104 }
Steven Rostedtf0868d12008-12-23 23:24:12 -0500105
106 s->len += ret;
107
Jiri Olsa3e695332009-10-23 19:36:17 -0400108 return 1;
Steven Rostedtf0868d12008-12-23 23:24:12 -0500109}
Steven Rostedt17c873e2009-04-10 18:12:50 -0400110EXPORT_SYMBOL_GPL(trace_seq_printf);
Steven Rostedtf0868d12008-12-23 23:24:12 -0500111
Steven Rostedt725c6242009-06-08 19:09:45 -0400112/**
113 * trace_seq_vprintf - sequence printing of trace information
114 * @s: trace sequence descriptor
115 * @fmt: printf format string
116 *
117 * The tracer may use either sequence operations or its own
118 * copy to user routines. To simplify formating of a trace
119 * trace_seq_printf is used to store strings into a special
120 * buffer (@s). Then the output may be either used by
121 * the sequencer or pulled into another buffer.
122 */
123int
124trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
125{
126 int len = (PAGE_SIZE - 1) - s->len;
127 int ret;
128
Johannes Bergd184b312009-11-25 16:10:14 +0100129 if (s->full || !len)
Steven Rostedt725c6242009-06-08 19:09:45 -0400130 return 0;
131
132 ret = vsnprintf(s->buffer + s->len, len, fmt, args);
133
134 /* If we can't write it all, don't bother writing anything */
Johannes Bergd184b312009-11-25 16:10:14 +0100135 if (ret >= len) {
136 s->full = 1;
Steven Rostedt725c6242009-06-08 19:09:45 -0400137 return 0;
Johannes Bergd184b312009-11-25 16:10:14 +0100138 }
Steven Rostedt725c6242009-06-08 19:09:45 -0400139
140 s->len += ret;
141
142 return len;
143}
144EXPORT_SYMBOL_GPL(trace_seq_vprintf);
145
Frederic Weisbecker769b0442009-03-06 17:21:49 +0100146int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
Lai Jiangshan1427cdf2009-03-06 17:21:47 +0100147{
148 int len = (PAGE_SIZE - 1) - s->len;
149 int ret;
150
Johannes Bergd184b312009-11-25 16:10:14 +0100151 if (s->full || !len)
Lai Jiangshan1427cdf2009-03-06 17:21:47 +0100152 return 0;
153
154 ret = bstr_printf(s->buffer + s->len, len, fmt, binary);
155
156 /* If we can't write it all, don't bother writing anything */
Johannes Bergd184b312009-11-25 16:10:14 +0100157 if (ret >= len) {
158 s->full = 1;
Lai Jiangshan1427cdf2009-03-06 17:21:47 +0100159 return 0;
Johannes Bergd184b312009-11-25 16:10:14 +0100160 }
Lai Jiangshan1427cdf2009-03-06 17:21:47 +0100161
162 s->len += ret;
163
164 return len;
165}
166
Steven Rostedtf0868d12008-12-23 23:24:12 -0500167/**
168 * trace_seq_puts - trace sequence printing of simple string
169 * @s: trace sequence descriptor
170 * @str: simple string to record
171 *
172 * The tracer may use either the sequence operations or its own
173 * copy to user routines. This function records a simple string
174 * into a special buffer (@s) for later retrieval by a sequencer
175 * or other mechanism.
176 */
177int trace_seq_puts(struct trace_seq *s, const char *str)
178{
179 int len = strlen(str);
180
Johannes Bergd184b312009-11-25 16:10:14 +0100181 if (s->full)
Steven Rostedtf0868d12008-12-23 23:24:12 -0500182 return 0;
183
Johannes Bergd184b312009-11-25 16:10:14 +0100184 if (len > ((PAGE_SIZE - 1) - s->len)) {
185 s->full = 1;
186 return 0;
187 }
188
Steven Rostedtf0868d12008-12-23 23:24:12 -0500189 memcpy(s->buffer + s->len, str, len);
190 s->len += len;
191
192 return len;
193}
194
195int trace_seq_putc(struct trace_seq *s, unsigned char c)
196{
Johannes Bergd184b312009-11-25 16:10:14 +0100197 if (s->full)
Steven Rostedtf0868d12008-12-23 23:24:12 -0500198 return 0;
199
Johannes Bergd184b312009-11-25 16:10:14 +0100200 if (s->len >= (PAGE_SIZE - 1)) {
201 s->full = 1;
202 return 0;
203 }
204
Steven Rostedtf0868d12008-12-23 23:24:12 -0500205 s->buffer[s->len++] = c;
206
207 return 1;
208}
Kei Tokunagabf816232010-04-01 20:41:40 +0900209EXPORT_SYMBOL(trace_seq_putc);
Steven Rostedtf0868d12008-12-23 23:24:12 -0500210
Li Zefanb14b70a2009-03-27 10:21:00 +0800211int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
Steven Rostedtf0868d12008-12-23 23:24:12 -0500212{
Johannes Bergd184b312009-11-25 16:10:14 +0100213 if (s->full)
Steven Rostedtf0868d12008-12-23 23:24:12 -0500214 return 0;
215
Johannes Bergd184b312009-11-25 16:10:14 +0100216 if (len > ((PAGE_SIZE - 1) - s->len)) {
217 s->full = 1;
218 return 0;
219 }
220
Steven Rostedtf0868d12008-12-23 23:24:12 -0500221 memcpy(s->buffer + s->len, mem, len);
222 s->len += len;
223
224 return len;
225}
226
Li Zefanb14b70a2009-03-27 10:21:00 +0800227int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len)
Steven Rostedtf0868d12008-12-23 23:24:12 -0500228{
229 unsigned char hex[HEX_CHARS];
Li Zefanb14b70a2009-03-27 10:21:00 +0800230 const unsigned char *data = mem;
Steven Rostedtf0868d12008-12-23 23:24:12 -0500231 int i, j;
232
Johannes Bergd184b312009-11-25 16:10:14 +0100233 if (s->full)
234 return 0;
235
Steven Rostedtf0868d12008-12-23 23:24:12 -0500236#ifdef __BIG_ENDIAN
237 for (i = 0, j = 0; i < len; i++) {
238#else
239 for (i = len-1, j = 0; i >= 0; i--) {
240#endif
241 hex[j++] = hex_asc_hi(data[i]);
242 hex[j++] = hex_asc_lo(data[i]);
243 }
244 hex[j++] = ' ';
245
246 return trace_seq_putmem(s, hex, j);
247}
248
Eduard - Gabriel Munteanubdd6df62009-03-23 15:12:22 +0200249void *trace_seq_reserve(struct trace_seq *s, size_t len)
250{
251 void *ret;
252
Johannes Bergd184b312009-11-25 16:10:14 +0100253 if (s->full)
Thiago Farina668eb652010-01-24 11:03:50 -0500254 return NULL;
Johannes Bergd184b312009-11-25 16:10:14 +0100255
256 if (len > ((PAGE_SIZE - 1) - s->len)) {
257 s->full = 1;
Eduard - Gabriel Munteanubdd6df62009-03-23 15:12:22 +0200258 return NULL;
Johannes Bergd184b312009-11-25 16:10:14 +0100259 }
Eduard - Gabriel Munteanubdd6df62009-03-23 15:12:22 +0200260
261 ret = s->buffer + s->len;
262 s->len += len;
263
264 return ret;
265}
266
Al Viro38eff282012-03-14 21:51:10 -0400267int trace_seq_path(struct trace_seq *s, const struct path *path)
Steven Rostedtf0868d12008-12-23 23:24:12 -0500268{
269 unsigned char *p;
270
Johannes Bergd184b312009-11-25 16:10:14 +0100271 if (s->full)
Steven Rostedtf0868d12008-12-23 23:24:12 -0500272 return 0;
Johannes Bergd184b312009-11-25 16:10:14 +0100273
274 if (s->len >= (PAGE_SIZE - 1)) {
275 s->full = 1;
276 return 0;
277 }
278
Steven Rostedtf0868d12008-12-23 23:24:12 -0500279 p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len);
280 if (!IS_ERR(p)) {
281 p = mangle_path(s->buffer + s->len, p, "\n");
282 if (p) {
283 s->len = p - s->buffer;
284 return 1;
285 }
286 } else {
287 s->buffer[s->len++] = '?';
288 return 1;
289 }
290
Johannes Bergd184b312009-11-25 16:10:14 +0100291 s->full = 1;
Steven Rostedtf0868d12008-12-23 23:24:12 -0500292 return 0;
293}
294
Steven Rostedtbe74b732009-05-26 20:25:22 +0200295const char *
296ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
297 unsigned long flags,
298 const struct trace_print_flags *flag_array)
299{
300 unsigned long mask;
301 const char *str;
Steven Whitehouse56d8bd32009-06-03 14:52:03 +0100302 const char *ret = p->buffer + p->len;
Andrey Vagine404b322012-02-19 14:16:07 +0300303 int i, first = 1;
Steven Rostedtbe74b732009-05-26 20:25:22 +0200304
Steven Rostedtbe74b732009-05-26 20:25:22 +0200305 for (i = 0; flag_array[i].name && flags; i++) {
306
307 mask = flag_array[i].mask;
308 if ((flags & mask) != mask)
309 continue;
310
311 str = flag_array[i].name;
312 flags &= ~mask;
Andrey Vagine404b322012-02-19 14:16:07 +0300313 if (!first && delim)
Steven Rostedtbe74b732009-05-26 20:25:22 +0200314 trace_seq_puts(p, delim);
Andrey Vagine404b322012-02-19 14:16:07 +0300315 else
316 first = 0;
Steven Rostedtbe74b732009-05-26 20:25:22 +0200317 trace_seq_puts(p, str);
318 }
319
320 /* check for left over flags */
321 if (flags) {
Steven Rostedt5b349262012-02-20 20:37:32 -0500322 if (!first && delim)
Steven Rostedtbe74b732009-05-26 20:25:22 +0200323 trace_seq_puts(p, delim);
324 trace_seq_printf(p, "0x%lx", flags);
325 }
326
327 trace_seq_putc(p, 0);
328
Steven Whitehouse56d8bd32009-06-03 14:52:03 +0100329 return ret;
Steven Rostedtbe74b732009-05-26 20:25:22 +0200330}
Steven Whitehouseec081dd2009-06-01 15:53:35 +0100331EXPORT_SYMBOL(ftrace_print_flags_seq);
Steven Rostedtbe74b732009-05-26 20:25:22 +0200332
Steven Rostedt0f4fc292009-05-20 19:21:47 -0400333const char *
334ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
335 const struct trace_print_flags *symbol_array)
336{
337 int i;
Steven Whitehouse56d8bd32009-06-03 14:52:03 +0100338 const char *ret = p->buffer + p->len;
Steven Rostedt0f4fc292009-05-20 19:21:47 -0400339
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
Steven Rostedt5b349262012-02-20 20:37:32 -0500349 if (ret == (const char *)(p->buffer + p->len))
Steven Rostedt0f4fc292009-05-20 19:21:47 -0400350 trace_seq_printf(p, "0x%lx", val);
351
352 trace_seq_putc(p, 0);
353
Steven Whitehouse56d8bd32009-06-03 14:52:03 +0100354 return ret;
Steven Rostedt0f4fc292009-05-20 19:21:47 -0400355}
Steven Whitehouseec081dd2009-06-01 15:53:35 +0100356EXPORT_SYMBOL(ftrace_print_symbols_seq);
Steven Rostedt0f4fc292009-05-20 19:21:47 -0400357
liubo2fc1b6f2011-04-19 09:35:28 +0800358#if BITS_PER_LONG == 32
359const char *
360ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
361 const struct trace_print_flags_u64 *symbol_array)
362{
363 int i;
364 const char *ret = p->buffer + p->len;
365
366 for (i = 0; symbol_array[i].name; i++) {
367
368 if (val != symbol_array[i].mask)
369 continue;
370
371 trace_seq_puts(p, symbol_array[i].name);
372 break;
373 }
374
Steven Rostedt5b349262012-02-20 20:37:32 -0500375 if (ret == (const char *)(p->buffer + p->len))
liubo2fc1b6f2011-04-19 09:35:28 +0800376 trace_seq_printf(p, "0x%llx", val);
377
378 trace_seq_putc(p, 0);
379
380 return ret;
381}
382EXPORT_SYMBOL(ftrace_print_symbols_seq_u64);
383#endif
384
Kei Tokunaga5a2e3992010-04-01 20:40:58 +0900385const char *
386ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
387{
388 int i;
389 const char *ret = p->buffer + p->len;
390
391 for (i = 0; i < buf_len; i++)
392 trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
393
394 trace_seq_putc(p, 0);
395
396 return ret;
397}
398EXPORT_SYMBOL(ftrace_print_hex_seq);
399
Li Zefanf71130d2013-02-21 10:32:38 +0800400int ftrace_raw_output_prep(struct trace_iterator *iter,
401 struct trace_event *trace_event)
402{
403 struct ftrace_event_call *event;
404 struct trace_seq *s = &iter->seq;
405 struct trace_seq *p = &iter->tmp_seq;
406 struct trace_entry *entry;
407 int ret;
408
409 event = container_of(trace_event, struct ftrace_event_call, event);
410 entry = iter->ent;
411
412 if (entry->type != event->event.type) {
413 WARN_ON_ONCE(1);
414 return TRACE_TYPE_UNHANDLED;
415 }
416
417 trace_seq_init(p);
418 ret = trace_seq_printf(s, "%s: ", event->name);
419 if (!ret)
420 return TRACE_TYPE_PARTIAL_LINE;
421
422 return 0;
423}
424EXPORT_SYMBOL(ftrace_raw_output_prep);
425
Steven Rostedtf0868d12008-12-23 23:24:12 -0500426#ifdef CONFIG_KRETPROBES
427static inline const char *kretprobed(const char *name)
428{
429 static const char tramp_name[] = "kretprobe_trampoline";
430 int size = sizeof(tramp_name);
431
432 if (strncmp(tramp_name, name, size) == 0)
433 return "[unknown/kretprobe'd]";
434 return name;
435}
436#else
437static inline const char *kretprobed(const char *name)
438{
439 return name;
440}
441#endif /* CONFIG_KRETPROBES */
442
443static int
444seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
445{
446#ifdef CONFIG_KALLSYMS
447 char str[KSYM_SYMBOL_LEN];
448 const char *name;
449
450 kallsyms_lookup(address, NULL, NULL, NULL, str);
451
452 name = kretprobed(str);
453
454 return trace_seq_printf(s, fmt, name);
455#endif
456 return 1;
457}
458
459static int
460seq_print_sym_offset(struct trace_seq *s, const char *fmt,
461 unsigned long address)
462{
463#ifdef CONFIG_KALLSYMS
464 char str[KSYM_SYMBOL_LEN];
465 const char *name;
466
467 sprint_symbol(str, address);
468 name = kretprobed(str);
469
470 return trace_seq_printf(s, fmt, name);
471#endif
472 return 1;
473}
474
475#ifndef CONFIG_64BIT
476# define IP_FMT "%08lx"
477#else
478# define IP_FMT "%016lx"
479#endif
480
481int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
482 unsigned long ip, unsigned long sym_flags)
483{
484 struct file *file = NULL;
485 unsigned long vmstart = 0;
486 int ret = 1;
487
Johannes Bergd184b312009-11-25 16:10:14 +0100488 if (s->full)
489 return 0;
490
Steven Rostedtf0868d12008-12-23 23:24:12 -0500491 if (mm) {
492 const struct vm_area_struct *vma;
493
494 down_read(&mm->mmap_sem);
495 vma = find_vma(mm, ip);
496 if (vma) {
497 file = vma->vm_file;
498 vmstart = vma->vm_start;
499 }
500 if (file) {
501 ret = trace_seq_path(s, &file->f_path);
502 if (ret)
503 ret = trace_seq_printf(s, "[+0x%lx]",
504 ip - vmstart);
505 }
506 up_read(&mm->mmap_sem);
507 }
508 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
509 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
510 return ret;
511}
512
513int
514seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
515 unsigned long sym_flags)
516{
517 struct mm_struct *mm = NULL;
518 int ret = 1;
519 unsigned int i;
520
521 if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
522 struct task_struct *task;
523 /*
524 * we do the lookup on the thread group leader,
525 * since individual threads might have already quit!
526 */
527 rcu_read_lock();
Steven Rostedt48659d32009-09-11 11:36:23 -0400528 task = find_task_by_vpid(entry->tgid);
Steven Rostedtf0868d12008-12-23 23:24:12 -0500529 if (task)
530 mm = get_task_mm(task);
531 rcu_read_unlock();
532 }
533
534 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
535 unsigned long ip = entry->caller[i];
536
537 if (ip == ULONG_MAX || !ret)
538 break;
walimis048dc502009-06-03 16:01:30 +0800539 if (ret)
540 ret = trace_seq_puts(s, " => ");
Steven Rostedtf0868d12008-12-23 23:24:12 -0500541 if (!ip) {
542 if (ret)
543 ret = trace_seq_puts(s, "??");
walimis048dc502009-06-03 16:01:30 +0800544 if (ret)
545 ret = trace_seq_puts(s, "\n");
Steven Rostedtf0868d12008-12-23 23:24:12 -0500546 continue;
547 }
548 if (!ret)
549 break;
550 if (ret)
551 ret = seq_print_user_ip(s, mm, ip, sym_flags);
walimis048dc502009-06-03 16:01:30 +0800552 ret = trace_seq_puts(s, "\n");
Steven Rostedtf0868d12008-12-23 23:24:12 -0500553 }
554
555 if (mm)
556 mmput(mm);
557 return ret;
558}
559
560int
561seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
562{
563 int ret;
564
565 if (!ip)
566 return trace_seq_printf(s, "0");
567
568 if (sym_flags & TRACE_ITER_SYM_OFFSET)
569 ret = seq_print_sym_offset(s, "%s", ip);
570 else
571 ret = seq_print_sym_short(s, "%s", ip);
572
573 if (!ret)
574 return 0;
575
576 if (sym_flags & TRACE_ITER_SYM_ADDR)
577 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
578 return ret;
579}
580
Steven Rostedtf81c9722009-09-11 14:24:13 -0400581/**
582 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
583 * @s: trace seq struct to write to
584 * @entry: The trace entry field from the ring buffer
585 *
586 * Prints the generic fields of irqs off, in hard or softirq, preempt
Steven Rostedte6e1e252011-03-09 10:41:56 -0500587 * count.
Steven Rostedtf81c9722009-09-11 14:24:13 -0400588 */
589int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200590{
David Sharp10da37a2010-12-03 16:13:26 -0800591 char hardsoft_irq;
592 char need_resched;
593 char irqs_off;
594 int hardirq;
595 int softirq;
Steven Rostedt637e7e82009-09-11 13:55:35 -0400596 int ret;
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200597
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200598 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
599 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -0200600
David Sharp10da37a2010-12-03 16:13:26 -0800601 irqs_off =
602 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
603 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
604 '.';
605 need_resched =
606 (entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.';
607 hardsoft_irq =
608 (hardirq && softirq) ? 'H' :
609 hardirq ? 'h' :
610 softirq ? 's' :
611 '.';
612
Steven Rostedtf81c9722009-09-11 14:24:13 -0400613 if (!trace_seq_printf(s, "%c%c%c",
David Sharp10da37a2010-12-03 16:13:26 -0800614 irqs_off, need_resched, hardsoft_irq))
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -0200615 return 0;
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200616
Steven Rostedt829b8762009-09-27 07:02:07 -0400617 if (entry->preempt_count)
618 ret = trace_seq_printf(s, "%x", entry->preempt_count);
Steven Rostedt637e7e82009-09-11 13:55:35 -0400619 else
Steven Rostedt829b8762009-09-27 07:02:07 -0400620 ret = trace_seq_putc(s, '.');
621
Steven Rostedte6e1e252011-03-09 10:41:56 -0500622 return ret;
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200623}
624
Steven Rostedtf81c9722009-09-11 14:24:13 -0400625static int
626lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
627{
628 char comm[TASK_COMM_LEN];
629
630 trace_find_cmdline(entry->pid, comm);
631
632 if (!trace_seq_printf(s, "%8.8s-%-5d %3d",
633 comm, entry->pid, cpu))
634 return 0;
635
636 return trace_print_lat_fmt(s, entry);
637}
638
David Sharp8be07092012-11-13 12:18:22 -0800639static unsigned long preempt_mark_thresh_us = 100;
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200640
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -0200641static int
David Sharp8be07092012-11-13 12:18:22 -0800642lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200643{
David Sharp8be07092012-11-13 12:18:22 -0800644 unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE;
645 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
Steven Rostedt (Red Hat)12883ef2013-03-05 09:24:35 -0500646 unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
David Sharp8be07092012-11-13 12:18:22 -0800647 unsigned long long rel_ts = next_ts - iter->ts;
648 struct trace_seq *s = &iter->seq;
649
650 if (in_ns) {
651 abs_ts = ns2usecs(abs_ts);
652 rel_ts = ns2usecs(rel_ts);
653 }
654
655 if (verbose && in_ns) {
656 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
657 unsigned long abs_msec = (unsigned long)abs_ts;
658 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
659 unsigned long rel_msec = (unsigned long)rel_ts;
660
661 return trace_seq_printf(
662 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
663 ns2usecs(iter->ts),
664 abs_msec, abs_usec,
665 rel_msec, rel_usec);
666 } else if (verbose && !in_ns) {
667 return trace_seq_printf(
668 s, "[%016llx] %lld (+%lld): ",
669 iter->ts, abs_ts, rel_ts);
670 } else if (!verbose && in_ns) {
671 return trace_seq_printf(
672 s, " %4lldus%c: ",
673 abs_ts,
674 rel_ts > preempt_mark_thresh_us ? '!' :
675 rel_ts > 1 ? '+' : ' ');
676 } else { /* !verbose && !in_ns */
677 return trace_seq_printf(s, " %4lld: ", abs_ts);
678 }
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200679}
680
681int trace_print_context(struct trace_iterator *iter)
682{
683 struct trace_seq *s = &iter->seq;
684 struct trace_entry *entry = iter->ent;
David Sharp8be07092012-11-13 12:18:22 -0800685 unsigned long long t;
686 unsigned long secs, usec_rem;
Steven Rostedt4ca53082009-03-16 19:20:15 -0400687 char comm[TASK_COMM_LEN];
Steven Rostedt77271ce2011-11-17 09:34:33 -0500688 int ret;
Steven Rostedt4ca53082009-03-16 19:20:15 -0400689
690 trace_find_cmdline(entry->pid, comm);
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200691
Steven Rostedt77271ce2011-11-17 09:34:33 -0500692 ret = trace_seq_printf(s, "%16s-%-5d [%03d] ",
693 comm, entry->pid, iter->cpu);
694 if (!ret)
695 return 0;
696
697 if (trace_flags & TRACE_ITER_IRQ_INFO) {
698 ret = trace_print_lat_fmt(s, entry);
699 if (!ret)
700 return 0;
701 }
702
David Sharp8be07092012-11-13 12:18:22 -0800703 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
704 t = ns2usecs(iter->ts);
705 usec_rem = do_div(t, USEC_PER_SEC);
706 secs = (unsigned long)t;
707 return trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
708 } else
709 return trace_seq_printf(s, " %12llu: ", iter->ts);
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200710}
711
712int trace_print_lat_context(struct trace_iterator *iter)
713{
714 u64 next_ts;
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -0200715 int ret;
Steven Rostedtdb4c75c2012-04-19 10:31:47 -0400716 /* trace_find_next_entry will reset ent_size */
717 int ent_size = iter->ent_size;
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200718 struct trace_seq *s = &iter->seq;
719 struct trace_entry *entry = iter->ent,
720 *next_entry = trace_find_next_entry(iter, NULL,
721 &next_ts);
722 unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200723
Steven Rostedtdb4c75c2012-04-19 10:31:47 -0400724 /* Restore the original ent_size */
725 iter->ent_size = ent_size;
726
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200727 if (!next_entry)
728 next_ts = iter->ts;
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200729
730 if (verbose) {
Steven Rostedt4ca53082009-03-16 19:20:15 -0400731 char comm[TASK_COMM_LEN];
732
733 trace_find_cmdline(entry->pid, comm);
734
David Sharp8be07092012-11-13 12:18:22 -0800735 ret = trace_seq_printf(
736 s, "%16s %5d %3d %d %08x %08lx ",
737 comm, entry->pid, iter->cpu, entry->flags,
738 entry->preempt_count, iter->idx);
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200739 } else {
Steven Rostedt1830b52d2009-02-07 19:38:43 -0500740 ret = lat_print_generic(s, entry, iter->cpu);
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200741 }
742
David Sharp8be07092012-11-13 12:18:22 -0800743 if (ret)
744 ret = lat_print_timestamp(iter, next_ts);
745
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -0200746 return ret;
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200747}
748
Steven Rostedtf633cef2008-12-23 23:24:13 -0500749static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
750
751static int task_state_char(unsigned long state)
752{
753 int bit = state ? __ffs(state) + 1 : 0;
754
755 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
756}
757
Steven Rostedtf0868d12008-12-23 23:24:12 -0500758/**
759 * ftrace_find_event - find a registered event
760 * @type: the type of event to look for
761 *
762 * Returns an event of type @type otherwise NULL
Lai Jiangshan4f535962009-05-18 19:35:34 +0800763 * Called with trace_event_read_lock() held.
Steven Rostedtf0868d12008-12-23 23:24:12 -0500764 */
765struct trace_event *ftrace_find_event(int type)
766{
767 struct trace_event *event;
768 struct hlist_node *n;
769 unsigned key;
770
771 key = type & (EVENT_HASHSIZE - 1);
772
Lai Jiangshan4f535962009-05-18 19:35:34 +0800773 hlist_for_each_entry(event, n, &event_hash[key], node) {
Steven Rostedtf0868d12008-12-23 23:24:12 -0500774 if (event->type == type)
775 return event;
776 }
777
778 return NULL;
779}
780
Steven Rostedt060fa5c82009-04-24 12:20:52 -0400781static LIST_HEAD(ftrace_event_list);
782
783static int trace_search_list(struct list_head **list)
784{
785 struct trace_event *e;
786 int last = __TRACE_LAST_TYPE;
787
788 if (list_empty(&ftrace_event_list)) {
789 *list = &ftrace_event_list;
790 return last + 1;
791 }
792
793 /*
794 * We used up all possible max events,
795 * lets see if somebody freed one.
796 */
797 list_for_each_entry(e, &ftrace_event_list, list) {
798 if (e->type != last + 1)
799 break;
800 last++;
801 }
802
803 /* Did we used up all 65 thousand events??? */
804 if ((last + 1) > FTRACE_MAX_EVENT)
805 return 0;
806
807 *list = &e->list;
808 return last + 1;
809}
810
Lai Jiangshan4f535962009-05-18 19:35:34 +0800811void trace_event_read_lock(void)
812{
813 down_read(&trace_event_mutex);
814}
815
816void trace_event_read_unlock(void)
817{
818 up_read(&trace_event_mutex);
819}
820
Steven Rostedtf0868d12008-12-23 23:24:12 -0500821/**
822 * register_ftrace_event - register output for an event type
823 * @event: the event type to register
824 *
825 * Event types are stored in a hash and this hash is used to
826 * find a way to print an event. If the @event->type is set
827 * then it will use that type, otherwise it will assign a
828 * type to use.
829 *
830 * If you assign your own type, please make sure it is added
831 * to the trace_type enum in trace.h, to avoid collisions
832 * with the dynamic types.
833 *
834 * Returns the event type number or zero on error.
835 */
836int register_ftrace_event(struct trace_event *event)
837{
838 unsigned key;
839 int ret = 0;
840
Lai Jiangshan4f535962009-05-18 19:35:34 +0800841 down_write(&trace_event_mutex);
Steven Rostedtf0868d12008-12-23 23:24:12 -0500842
Steven Rostedt060fa5c82009-04-24 12:20:52 -0400843 if (WARN_ON(!event))
Peter Zijlstra28bea272009-03-19 20:26:14 +0100844 goto out;
Peter Zijlstra28bea272009-03-19 20:26:14 +0100845
Steven Rostedta9a57762010-04-22 18:46:14 -0400846 if (WARN_ON(!event->funcs))
847 goto out;
848
Steven Rostedt060fa5c82009-04-24 12:20:52 -0400849 INIT_LIST_HEAD(&event->list);
850
851 if (!event->type) {
Jaswinder Singh Rajput48dd0fe2009-05-06 15:45:45 +0530852 struct list_head *list = NULL;
Steven Rostedt060fa5c82009-04-24 12:20:52 -0400853
854 if (next_event_type > FTRACE_MAX_EVENT) {
855
856 event->type = trace_search_list(&list);
857 if (!event->type)
858 goto out;
859
860 } else {
861
862 event->type = next_event_type++;
863 list = &ftrace_event_list;
864 }
865
866 if (WARN_ON(ftrace_find_event(event->type)))
867 goto out;
868
869 list_add_tail(&event->list, list);
870
871 } else if (event->type > __TRACE_LAST_TYPE) {
Steven Rostedtf0868d12008-12-23 23:24:12 -0500872 printk(KERN_WARNING "Need to add type to trace.h\n");
873 WARN_ON(1);
Steven Rostedtf0868d12008-12-23 23:24:12 -0500874 goto out;
Steven Rostedt060fa5c82009-04-24 12:20:52 -0400875 } else {
876 /* Is this event already used */
877 if (ftrace_find_event(event->type))
878 goto out;
879 }
Steven Rostedtf0868d12008-12-23 23:24:12 -0500880
Steven Rostedta9a57762010-04-22 18:46:14 -0400881 if (event->funcs->trace == NULL)
882 event->funcs->trace = trace_nop_print;
883 if (event->funcs->raw == NULL)
884 event->funcs->raw = trace_nop_print;
885 if (event->funcs->hex == NULL)
886 event->funcs->hex = trace_nop_print;
887 if (event->funcs->binary == NULL)
888 event->funcs->binary = trace_nop_print;
Arnaldo Carvalho de Melo268ccda2009-02-04 20:16:39 -0200889
Steven Rostedtf0868d12008-12-23 23:24:12 -0500890 key = event->type & (EVENT_HASHSIZE - 1);
891
Lai Jiangshan4f535962009-05-18 19:35:34 +0800892 hlist_add_head(&event->node, &event_hash[key]);
Steven Rostedtf0868d12008-12-23 23:24:12 -0500893
894 ret = event->type;
895 out:
Lai Jiangshan4f535962009-05-18 19:35:34 +0800896 up_write(&trace_event_mutex);
Steven Rostedtf0868d12008-12-23 23:24:12 -0500897
898 return ret;
899}
Steven Rostedt17c873e2009-04-10 18:12:50 -0400900EXPORT_SYMBOL_GPL(register_ftrace_event);
Steven Rostedtf0868d12008-12-23 23:24:12 -0500901
Steven Rostedt110bf2b2009-06-09 17:29:07 -0400902/*
903 * Used by module code with the trace_event_mutex held for write.
904 */
905int __unregister_ftrace_event(struct trace_event *event)
906{
907 hlist_del(&event->node);
908 list_del(&event->list);
909 return 0;
910}
911
Steven Rostedtf0868d12008-12-23 23:24:12 -0500912/**
913 * unregister_ftrace_event - remove a no longer used event
914 * @event: the event to remove
915 */
916int unregister_ftrace_event(struct trace_event *event)
917{
Lai Jiangshan4f535962009-05-18 19:35:34 +0800918 down_write(&trace_event_mutex);
Steven Rostedt110bf2b2009-06-09 17:29:07 -0400919 __unregister_ftrace_event(event);
Lai Jiangshan4f535962009-05-18 19:35:34 +0800920 up_write(&trace_event_mutex);
Steven Rostedtf0868d12008-12-23 23:24:12 -0500921
922 return 0;
923}
Steven Rostedt17c873e2009-04-10 18:12:50 -0400924EXPORT_SYMBOL_GPL(unregister_ftrace_event);
Steven Rostedtf633cef2008-12-23 23:24:13 -0500925
926/*
927 * Standard events
928 */
929
Steven Rostedta9a57762010-04-22 18:46:14 -0400930enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
931 struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -0500932{
Jiri Olsaee5e51f2011-03-25 12:05:18 +0100933 if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type))
934 return TRACE_TYPE_PARTIAL_LINE;
935
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -0200936 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -0500937}
938
939/* TRACE_FN */
Steven Rostedta9a57762010-04-22 18:46:14 -0400940static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
941 struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -0500942{
943 struct ftrace_entry *field;
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -0200944 struct trace_seq *s = &iter->seq;
Steven Rostedtf633cef2008-12-23 23:24:13 -0500945
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -0200946 trace_assign_type(field, iter->ent);
Steven Rostedtf633cef2008-12-23 23:24:13 -0500947
948 if (!seq_print_ip_sym(s, field->ip, flags))
949 goto partial;
950
951 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
952 if (!trace_seq_printf(s, " <-"))
953 goto partial;
954 if (!seq_print_ip_sym(s,
955 field->parent_ip,
956 flags))
957 goto partial;
958 }
959 if (!trace_seq_printf(s, "\n"))
960 goto partial;
961
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -0200962 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -0500963
964 partial:
965 return TRACE_TYPE_PARTIAL_LINE;
966}
967
Steven Rostedta9a57762010-04-22 18:46:14 -0400968static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
969 struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -0500970{
971 struct ftrace_entry *field;
972
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -0200973 trace_assign_type(field, iter->ent);
Steven Rostedtf633cef2008-12-23 23:24:13 -0500974
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -0200975 if (!trace_seq_printf(&iter->seq, "%lx %lx\n",
Lai Jiangshan6c1a99a2009-01-15 18:05:40 +0800976 field->ip,
977 field->parent_ip))
Steven Rostedtf633cef2008-12-23 23:24:13 -0500978 return TRACE_TYPE_PARTIAL_LINE;
979
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -0200980 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -0500981}
982
Steven Rostedta9a57762010-04-22 18:46:14 -0400983static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
984 struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -0500985{
986 struct ftrace_entry *field;
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -0200987 struct trace_seq *s = &iter->seq;
Steven Rostedtf633cef2008-12-23 23:24:13 -0500988
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -0200989 trace_assign_type(field, iter->ent);
Steven Rostedtf633cef2008-12-23 23:24:13 -0500990
991 SEQ_PUT_HEX_FIELD_RET(s, field->ip);
992 SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
993
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -0200994 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -0500995}
996
Steven Rostedta9a57762010-04-22 18:46:14 -0400997static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
998 struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -0500999{
1000 struct ftrace_entry *field;
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001001 struct trace_seq *s = &iter->seq;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001002
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001003 trace_assign_type(field, iter->ent);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001004
1005 SEQ_PUT_FIELD_RET(s, field->ip);
1006 SEQ_PUT_FIELD_RET(s, field->parent_ip);
1007
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -02001008 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001009}
1010
Steven Rostedta9a57762010-04-22 18:46:14 -04001011static struct trace_event_functions trace_fn_funcs = {
Steven Rostedtf633cef2008-12-23 23:24:13 -05001012 .trace = trace_fn_trace,
Steven Rostedtf633cef2008-12-23 23:24:13 -05001013 .raw = trace_fn_raw,
1014 .hex = trace_fn_hex,
1015 .binary = trace_fn_bin,
1016};
1017
Steven Rostedta9a57762010-04-22 18:46:14 -04001018static struct trace_event trace_fn_event = {
1019 .type = TRACE_FN,
1020 .funcs = &trace_fn_funcs,
1021};
1022
Steven Rostedtf633cef2008-12-23 23:24:13 -05001023/* TRACE_CTX an TRACE_WAKE */
Arnaldo Carvalho de Meloae7462b2009-02-03 22:05:50 -02001024static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
1025 char *delim)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001026{
1027 struct ctx_switch_entry *field;
Steven Rostedt4ca53082009-03-16 19:20:15 -04001028 char comm[TASK_COMM_LEN];
Steven Rostedtf633cef2008-12-23 23:24:13 -05001029 int S, T;
1030
Steven Rostedt4ca53082009-03-16 19:20:15 -04001031
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001032 trace_assign_type(field, iter->ent);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001033
1034 T = task_state_char(field->next_state);
1035 S = task_state_char(field->prev_state);
Steven Rostedt4ca53082009-03-16 19:20:15 -04001036 trace_find_cmdline(field->next_pid, comm);
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001037 if (!trace_seq_printf(&iter->seq,
1038 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
Lai Jiangshan6c1a99a2009-01-15 18:05:40 +08001039 field->prev_pid,
1040 field->prev_prio,
1041 S, delim,
1042 field->next_cpu,
1043 field->next_pid,
1044 field->next_prio,
1045 T, comm))
Steven Rostedtf633cef2008-12-23 23:24:13 -05001046 return TRACE_TYPE_PARTIAL_LINE;
1047
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -02001048 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001049}
1050
Steven Rostedta9a57762010-04-22 18:46:14 -04001051static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
1052 struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001053{
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001054 return trace_ctxwake_print(iter, "==>");
Steven Rostedtf633cef2008-12-23 23:24:13 -05001055}
1056
Arnaldo Carvalho de Meloae7462b2009-02-03 22:05:50 -02001057static enum print_line_t trace_wake_print(struct trace_iterator *iter,
Steven Rostedta9a57762010-04-22 18:46:14 -04001058 int flags, struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001059{
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001060 return trace_ctxwake_print(iter, " +");
Steven Rostedtf633cef2008-12-23 23:24:13 -05001061}
1062
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001063static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001064{
1065 struct ctx_switch_entry *field;
1066 int T;
1067
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001068 trace_assign_type(field, iter->ent);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001069
1070 if (!S)
Hiroshi Shimamotob0f56f12009-10-01 13:33:28 +09001071 S = task_state_char(field->prev_state);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001072 T = task_state_char(field->next_state);
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001073 if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
Lai Jiangshan6c1a99a2009-01-15 18:05:40 +08001074 field->prev_pid,
1075 field->prev_prio,
1076 S,
1077 field->next_cpu,
1078 field->next_pid,
1079 field->next_prio,
1080 T))
Steven Rostedtf633cef2008-12-23 23:24:13 -05001081 return TRACE_TYPE_PARTIAL_LINE;
1082
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -02001083 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001084}
1085
Steven Rostedta9a57762010-04-22 18:46:14 -04001086static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
1087 struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001088{
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001089 return trace_ctxwake_raw(iter, 0);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001090}
1091
Steven Rostedta9a57762010-04-22 18:46:14 -04001092static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1093 struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001094{
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001095 return trace_ctxwake_raw(iter, '+');
Steven Rostedtf633cef2008-12-23 23:24:13 -05001096}
1097
1098
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001099static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001100{
1101 struct ctx_switch_entry *field;
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001102 struct trace_seq *s = &iter->seq;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001103 int T;
1104
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001105 trace_assign_type(field, iter->ent);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001106
1107 if (!S)
Hiroshi Shimamotob0f56f12009-10-01 13:33:28 +09001108 S = task_state_char(field->prev_state);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001109 T = task_state_char(field->next_state);
1110
1111 SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
1112 SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
1113 SEQ_PUT_HEX_FIELD_RET(s, S);
1114 SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
1115 SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
1116 SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
1117 SEQ_PUT_HEX_FIELD_RET(s, T);
1118
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -02001119 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001120}
1121
Steven Rostedta9a57762010-04-22 18:46:14 -04001122static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1123 struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001124{
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001125 return trace_ctxwake_hex(iter, 0);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001126}
1127
Steven Rostedta9a57762010-04-22 18:46:14 -04001128static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1129 struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001130{
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001131 return trace_ctxwake_hex(iter, '+');
Steven Rostedtf633cef2008-12-23 23:24:13 -05001132}
1133
Arnaldo Carvalho de Meloae7462b2009-02-03 22:05:50 -02001134static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
Steven Rostedta9a57762010-04-22 18:46:14 -04001135 int flags, struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001136{
1137 struct ctx_switch_entry *field;
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001138 struct trace_seq *s = &iter->seq;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001139
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001140 trace_assign_type(field, iter->ent);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001141
1142 SEQ_PUT_FIELD_RET(s, field->prev_pid);
1143 SEQ_PUT_FIELD_RET(s, field->prev_prio);
1144 SEQ_PUT_FIELD_RET(s, field->prev_state);
1145 SEQ_PUT_FIELD_RET(s, field->next_pid);
1146 SEQ_PUT_FIELD_RET(s, field->next_prio);
1147 SEQ_PUT_FIELD_RET(s, field->next_state);
1148
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -02001149 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001150}
1151
Steven Rostedta9a57762010-04-22 18:46:14 -04001152static struct trace_event_functions trace_ctx_funcs = {
Steven Rostedtf633cef2008-12-23 23:24:13 -05001153 .trace = trace_ctx_print,
Steven Rostedtf633cef2008-12-23 23:24:13 -05001154 .raw = trace_ctx_raw,
1155 .hex = trace_ctx_hex,
1156 .binary = trace_ctxwake_bin,
1157};
1158
Steven Rostedta9a57762010-04-22 18:46:14 -04001159static struct trace_event trace_ctx_event = {
1160 .type = TRACE_CTX,
1161 .funcs = &trace_ctx_funcs,
1162};
1163
1164static struct trace_event_functions trace_wake_funcs = {
Steven Rostedtf633cef2008-12-23 23:24:13 -05001165 .trace = trace_wake_print,
Steven Rostedtf633cef2008-12-23 23:24:13 -05001166 .raw = trace_wake_raw,
1167 .hex = trace_wake_hex,
1168 .binary = trace_ctxwake_bin,
1169};
1170
Steven Rostedta9a57762010-04-22 18:46:14 -04001171static struct trace_event trace_wake_event = {
1172 .type = TRACE_WAKE,
1173 .funcs = &trace_wake_funcs,
1174};
1175
Steven Rostedtf633cef2008-12-23 23:24:13 -05001176/* TRACE_STACK */
1177
Arnaldo Carvalho de Meloae7462b2009-02-03 22:05:50 -02001178static enum print_line_t trace_stack_print(struct trace_iterator *iter,
Steven Rostedta9a57762010-04-22 18:46:14 -04001179 int flags, struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001180{
1181 struct stack_entry *field;
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001182 struct trace_seq *s = &iter->seq;
Steven Rostedt4a9bd3f2011-07-14 16:36:53 -04001183 unsigned long *p;
1184 unsigned long *end;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001185
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001186 trace_assign_type(field, iter->ent);
Steven Rostedt4a9bd3f2011-07-14 16:36:53 -04001187 end = (unsigned long *)((long)iter->ent + iter->ent_size);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001188
Steven Rostedt563af162009-06-03 11:10:44 -04001189 if (!trace_seq_puts(s, "<stack trace>\n"))
walimisf11b3f42009-06-03 16:01:29 +08001190 goto partial;
Steven Rostedt4a9bd3f2011-07-14 16:36:53 -04001191
1192 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
walimisf11b3f42009-06-03 16:01:29 +08001193 if (!trace_seq_puts(s, " => "))
1194 goto partial;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001195
Steven Rostedt4a9bd3f2011-07-14 16:36:53 -04001196 if (!seq_print_ip_sym(s, *p, flags))
walimisf11b3f42009-06-03 16:01:29 +08001197 goto partial;
Lai Jiangshan6c1a99a2009-01-15 18:05:40 +08001198 if (!trace_seq_puts(s, "\n"))
Steven Rostedtf633cef2008-12-23 23:24:13 -05001199 goto partial;
1200 }
1201
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -02001202 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001203
1204 partial:
1205 return TRACE_TYPE_PARTIAL_LINE;
1206}
1207
Steven Rostedta9a57762010-04-22 18:46:14 -04001208static struct trace_event_functions trace_stack_funcs = {
Steven Rostedtf633cef2008-12-23 23:24:13 -05001209 .trace = trace_stack_print,
Steven Rostedtf633cef2008-12-23 23:24:13 -05001210};
1211
Steven Rostedta9a57762010-04-22 18:46:14 -04001212static struct trace_event trace_stack_event = {
1213 .type = TRACE_STACK,
1214 .funcs = &trace_stack_funcs,
1215};
1216
Steven Rostedtf633cef2008-12-23 23:24:13 -05001217/* TRACE_USER_STACK */
Arnaldo Carvalho de Meloae7462b2009-02-03 22:05:50 -02001218static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
Steven Rostedta9a57762010-04-22 18:46:14 -04001219 int flags, struct trace_event *event)
Steven Rostedtf633cef2008-12-23 23:24:13 -05001220{
1221 struct userstack_entry *field;
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001222 struct trace_seq *s = &iter->seq;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001223
Arnaldo Carvalho de Melo2c9b2382009-02-02 20:30:12 -02001224 trace_assign_type(field, iter->ent);
Steven Rostedtf633cef2008-12-23 23:24:13 -05001225
Steven Rostedt563af162009-06-03 11:10:44 -04001226 if (!trace_seq_puts(s, "<user stack trace>\n"))
Steven Rostedtf633cef2008-12-23 23:24:13 -05001227 goto partial;
1228
walimis048dc502009-06-03 16:01:30 +08001229 if (!seq_print_userip_objs(field, s, flags))
Steven Rostedtf633cef2008-12-23 23:24:13 -05001230 goto partial;
1231
Arnaldo Carvalho de Melod9793bd2009-02-03 20:20:41 -02001232 return TRACE_TYPE_HANDLED;
Steven Rostedtf633cef2008-12-23 23:24:13 -05001233
1234 partial:
1235 return TRACE_TYPE_PARTIAL_LINE;
1236}
1237
Steven Rostedta9a57762010-04-22 18:46:14 -04001238static struct trace_event_functions trace_user_stack_funcs = {
Steven Rostedtf633cef2008-12-23 23:24:13 -05001239 .trace = trace_user_stack_print,
Steven Rostedtf633cef2008-12-23 23:24:13 -05001240};
1241
Steven Rostedta9a57762010-04-22 18:46:14 -04001242static struct trace_event trace_user_stack_event = {
1243 .type = TRACE_USER_STACK,
1244 .funcs = &trace_user_stack_funcs,
1245};
1246
Frederic Weisbecker48ead022009-03-12 18:24:49 +01001247/* TRACE_BPRINT */
Lai Jiangshan1427cdf2009-03-06 17:21:47 +01001248static enum print_line_t
Steven Rostedta9a57762010-04-22 18:46:14 -04001249trace_bprint_print(struct trace_iterator *iter, int flags,
1250 struct trace_event *event)
Lai Jiangshan1427cdf2009-03-06 17:21:47 +01001251{
1252 struct trace_entry *entry = iter->ent;
1253 struct trace_seq *s = &iter->seq;
Frederic Weisbecker48ead022009-03-12 18:24:49 +01001254 struct bprint_entry *field;
Lai Jiangshan1427cdf2009-03-06 17:21:47 +01001255
1256 trace_assign_type(field, entry);
1257
1258 if (!seq_print_ip_sym(s, field->ip, flags))
1259 goto partial;
1260
1261 if (!trace_seq_puts(s, ": "))
1262 goto partial;
1263
1264 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1265 goto partial;
1266
1267 return TRACE_TYPE_HANDLED;
1268
1269 partial:
1270 return TRACE_TYPE_PARTIAL_LINE;
1271}
1272
Lai Jiangshan1427cdf2009-03-06 17:21:47 +01001273
Frederic Weisbecker48ead022009-03-12 18:24:49 +01001274static enum print_line_t
Steven Rostedta9a57762010-04-22 18:46:14 -04001275trace_bprint_raw(struct trace_iterator *iter, int flags,
1276 struct trace_event *event)
Frederic Weisbecker769b0442009-03-06 17:21:49 +01001277{
Frederic Weisbecker48ead022009-03-12 18:24:49 +01001278 struct bprint_entry *field;
Frederic Weisbecker769b0442009-03-06 17:21:49 +01001279 struct trace_seq *s = &iter->seq;
1280
1281 trace_assign_type(field, iter->ent);
Lai Jiangshan1427cdf2009-03-06 17:21:47 +01001282
1283 if (!trace_seq_printf(s, ": %lx : ", field->ip))
1284 goto partial;
1285
1286 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1287 goto partial;
1288
1289 return TRACE_TYPE_HANDLED;
1290
1291 partial:
1292 return TRACE_TYPE_PARTIAL_LINE;
1293}
1294
Steven Rostedta9a57762010-04-22 18:46:14 -04001295static struct trace_event_functions trace_bprint_funcs = {
Frederic Weisbecker48ead022009-03-12 18:24:49 +01001296 .trace = trace_bprint_print,
1297 .raw = trace_bprint_raw,
1298};
1299
Steven Rostedta9a57762010-04-22 18:46:14 -04001300static struct trace_event trace_bprint_event = {
1301 .type = TRACE_BPRINT,
1302 .funcs = &trace_bprint_funcs,
1303};
1304
Frederic Weisbecker48ead022009-03-12 18:24:49 +01001305/* TRACE_PRINT */
1306static enum print_line_t trace_print_print(struct trace_iterator *iter,
Steven Rostedta9a57762010-04-22 18:46:14 -04001307 int flags, struct trace_event *event)
Frederic Weisbecker48ead022009-03-12 18:24:49 +01001308{
1309 struct print_entry *field;
1310 struct trace_seq *s = &iter->seq;
1311
1312 trace_assign_type(field, iter->ent);
1313
1314 if (!seq_print_ip_sym(s, field->ip, flags))
1315 goto partial;
1316
1317 if (!trace_seq_printf(s, ": %s", field->buf))
1318 goto partial;
1319
1320 return TRACE_TYPE_HANDLED;
1321
1322 partial:
1323 return TRACE_TYPE_PARTIAL_LINE;
1324}
1325
Steven Rostedta9a57762010-04-22 18:46:14 -04001326static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1327 struct trace_event *event)
Frederic Weisbecker48ead022009-03-12 18:24:49 +01001328{
1329 struct print_entry *field;
1330
1331 trace_assign_type(field, iter->ent);
1332
1333 if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf))
1334 goto partial;
1335
1336 return TRACE_TYPE_HANDLED;
1337
1338 partial:
1339 return TRACE_TYPE_PARTIAL_LINE;
1340}
1341
Steven Rostedta9a57762010-04-22 18:46:14 -04001342static struct trace_event_functions trace_print_funcs = {
Frederic Weisbecker769b0442009-03-06 17:21:49 +01001343 .trace = trace_print_print,
1344 .raw = trace_print_raw,
Lai Jiangshan1427cdf2009-03-06 17:21:47 +01001345};
1346
Steven Rostedta9a57762010-04-22 18:46:14 -04001347static struct trace_event trace_print_event = {
1348 .type = TRACE_PRINT,
1349 .funcs = &trace_print_funcs,
1350};
1351
Frederic Weisbecker48ead022009-03-12 18:24:49 +01001352
Steven Rostedtf633cef2008-12-23 23:24:13 -05001353static struct trace_event *events[] __initdata = {
1354 &trace_fn_event,
1355 &trace_ctx_event,
1356 &trace_wake_event,
Steven Rostedtf633cef2008-12-23 23:24:13 -05001357 &trace_stack_event,
1358 &trace_user_stack_event,
Frederic Weisbecker48ead022009-03-12 18:24:49 +01001359 &trace_bprint_event,
Steven Rostedtf633cef2008-12-23 23:24:13 -05001360 &trace_print_event,
1361 NULL
1362};
1363
1364__init static int init_events(void)
1365{
1366 struct trace_event *event;
1367 int i, ret;
1368
1369 for (i = 0; events[i]; i++) {
1370 event = events[i];
1371
1372 ret = register_ftrace_event(event);
1373 if (!ret) {
1374 printk(KERN_WARNING "event %d failed to register\n",
1375 event->type);
1376 WARN_ON_ONCE(1);
1377 }
1378 }
1379
1380 return 0;
1381}
Steven Rostedt7374e822012-05-31 21:40:05 -04001382early_initcall(init_events);