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Commit | Line | Data |
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f0868d1e SR |
1 | /* |
2 | * trace_output.c | |
3 | * | |
4 | * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/mutex.h> | |
10 | #include <linux/ftrace.h> | |
11 | ||
12 | #include "trace_output.h" | |
13 | ||
14 | /* must be a power of 2 */ | |
15 | #define EVENT_HASHSIZE 128 | |
16 | ||
17 | static DEFINE_MUTEX(trace_event_mutex); | |
18 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; | |
19 | ||
20 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
21 | ||
22 | /** | |
23 | * trace_seq_printf - sequence printing of trace information | |
24 | * @s: trace sequence descriptor | |
25 | * @fmt: printf format string | |
26 | * | |
27 | * The tracer may use either sequence operations or its own | |
28 | * copy to user routines. To simplify formating of a trace | |
29 | * trace_seq_printf is used to store strings into a special | |
30 | * buffer (@s). Then the output may be either used by | |
31 | * the sequencer or pulled into another buffer. | |
32 | */ | |
33 | int | |
34 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
35 | { | |
36 | int len = (PAGE_SIZE - 1) - s->len; | |
37 | va_list ap; | |
38 | int ret; | |
39 | ||
40 | if (!len) | |
41 | return 0; | |
42 | ||
43 | va_start(ap, fmt); | |
44 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
45 | va_end(ap); | |
46 | ||
47 | /* If we can't write it all, don't bother writing anything */ | |
48 | if (ret >= len) | |
49 | return 0; | |
50 | ||
51 | s->len += ret; | |
52 | ||
53 | return len; | |
54 | } | |
55 | ||
56 | /** | |
57 | * trace_seq_puts - trace sequence printing of simple string | |
58 | * @s: trace sequence descriptor | |
59 | * @str: simple string to record | |
60 | * | |
61 | * The tracer may use either the sequence operations or its own | |
62 | * copy to user routines. This function records a simple string | |
63 | * into a special buffer (@s) for later retrieval by a sequencer | |
64 | * or other mechanism. | |
65 | */ | |
66 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
67 | { | |
68 | int len = strlen(str); | |
69 | ||
70 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
71 | return 0; | |
72 | ||
73 | memcpy(s->buffer + s->len, str, len); | |
74 | s->len += len; | |
75 | ||
76 | return len; | |
77 | } | |
78 | ||
79 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
80 | { | |
81 | if (s->len >= (PAGE_SIZE - 1)) | |
82 | return 0; | |
83 | ||
84 | s->buffer[s->len++] = c; | |
85 | ||
86 | return 1; | |
87 | } | |
88 | ||
89 | int trace_seq_putmem(struct trace_seq *s, void *mem, size_t len) | |
90 | { | |
91 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
92 | return 0; | |
93 | ||
94 | memcpy(s->buffer + s->len, mem, len); | |
95 | s->len += len; | |
96 | ||
97 | return len; | |
98 | } | |
99 | ||
100 | int trace_seq_putmem_hex(struct trace_seq *s, void *mem, size_t len) | |
101 | { | |
102 | unsigned char hex[HEX_CHARS]; | |
103 | unsigned char *data = mem; | |
104 | int i, j; | |
105 | ||
106 | #ifdef __BIG_ENDIAN | |
107 | for (i = 0, j = 0; i < len; i++) { | |
108 | #else | |
109 | for (i = len-1, j = 0; i >= 0; i--) { | |
110 | #endif | |
111 | hex[j++] = hex_asc_hi(data[i]); | |
112 | hex[j++] = hex_asc_lo(data[i]); | |
113 | } | |
114 | hex[j++] = ' '; | |
115 | ||
116 | return trace_seq_putmem(s, hex, j); | |
117 | } | |
118 | ||
119 | int trace_seq_path(struct trace_seq *s, struct path *path) | |
120 | { | |
121 | unsigned char *p; | |
122 | ||
123 | if (s->len >= (PAGE_SIZE - 1)) | |
124 | return 0; | |
125 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); | |
126 | if (!IS_ERR(p)) { | |
127 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
128 | if (p) { | |
129 | s->len = p - s->buffer; | |
130 | return 1; | |
131 | } | |
132 | } else { | |
133 | s->buffer[s->len++] = '?'; | |
134 | return 1; | |
135 | } | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | #ifdef CONFIG_KRETPROBES | |
141 | static inline const char *kretprobed(const char *name) | |
142 | { | |
143 | static const char tramp_name[] = "kretprobe_trampoline"; | |
144 | int size = sizeof(tramp_name); | |
145 | ||
146 | if (strncmp(tramp_name, name, size) == 0) | |
147 | return "[unknown/kretprobe'd]"; | |
148 | return name; | |
149 | } | |
150 | #else | |
151 | static inline const char *kretprobed(const char *name) | |
152 | { | |
153 | return name; | |
154 | } | |
155 | #endif /* CONFIG_KRETPROBES */ | |
156 | ||
157 | static int | |
158 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
159 | { | |
160 | #ifdef CONFIG_KALLSYMS | |
161 | char str[KSYM_SYMBOL_LEN]; | |
162 | const char *name; | |
163 | ||
164 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
165 | ||
166 | name = kretprobed(str); | |
167 | ||
168 | return trace_seq_printf(s, fmt, name); | |
169 | #endif | |
170 | return 1; | |
171 | } | |
172 | ||
173 | static int | |
174 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
175 | unsigned long address) | |
176 | { | |
177 | #ifdef CONFIG_KALLSYMS | |
178 | char str[KSYM_SYMBOL_LEN]; | |
179 | const char *name; | |
180 | ||
181 | sprint_symbol(str, address); | |
182 | name = kretprobed(str); | |
183 | ||
184 | return trace_seq_printf(s, fmt, name); | |
185 | #endif | |
186 | return 1; | |
187 | } | |
188 | ||
189 | #ifndef CONFIG_64BIT | |
190 | # define IP_FMT "%08lx" | |
191 | #else | |
192 | # define IP_FMT "%016lx" | |
193 | #endif | |
194 | ||
195 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
196 | unsigned long ip, unsigned long sym_flags) | |
197 | { | |
198 | struct file *file = NULL; | |
199 | unsigned long vmstart = 0; | |
200 | int ret = 1; | |
201 | ||
202 | if (mm) { | |
203 | const struct vm_area_struct *vma; | |
204 | ||
205 | down_read(&mm->mmap_sem); | |
206 | vma = find_vma(mm, ip); | |
207 | if (vma) { | |
208 | file = vma->vm_file; | |
209 | vmstart = vma->vm_start; | |
210 | } | |
211 | if (file) { | |
212 | ret = trace_seq_path(s, &file->f_path); | |
213 | if (ret) | |
214 | ret = trace_seq_printf(s, "[+0x%lx]", | |
215 | ip - vmstart); | |
216 | } | |
217 | up_read(&mm->mmap_sem); | |
218 | } | |
219 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
220 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
221 | return ret; | |
222 | } | |
223 | ||
224 | int | |
225 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
226 | unsigned long sym_flags) | |
227 | { | |
228 | struct mm_struct *mm = NULL; | |
229 | int ret = 1; | |
230 | unsigned int i; | |
231 | ||
232 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
233 | struct task_struct *task; | |
234 | /* | |
235 | * we do the lookup on the thread group leader, | |
236 | * since individual threads might have already quit! | |
237 | */ | |
238 | rcu_read_lock(); | |
239 | task = find_task_by_vpid(entry->ent.tgid); | |
240 | if (task) | |
241 | mm = get_task_mm(task); | |
242 | rcu_read_unlock(); | |
243 | } | |
244 | ||
245 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
246 | unsigned long ip = entry->caller[i]; | |
247 | ||
248 | if (ip == ULONG_MAX || !ret) | |
249 | break; | |
250 | if (i && ret) | |
251 | ret = trace_seq_puts(s, " <- "); | |
252 | if (!ip) { | |
253 | if (ret) | |
254 | ret = trace_seq_puts(s, "??"); | |
255 | continue; | |
256 | } | |
257 | if (!ret) | |
258 | break; | |
259 | if (ret) | |
260 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
261 | } | |
262 | ||
263 | if (mm) | |
264 | mmput(mm); | |
265 | return ret; | |
266 | } | |
267 | ||
268 | int | |
269 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
270 | { | |
271 | int ret; | |
272 | ||
273 | if (!ip) | |
274 | return trace_seq_printf(s, "0"); | |
275 | ||
276 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
277 | ret = seq_print_sym_offset(s, "%s", ip); | |
278 | else | |
279 | ret = seq_print_sym_short(s, "%s", ip); | |
280 | ||
281 | if (!ret) | |
282 | return 0; | |
283 | ||
284 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
285 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
286 | return ret; | |
287 | } | |
288 | ||
d9793bd8 | 289 | static int |
c4a8e8be FW |
290 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) |
291 | { | |
292 | int hardirq, softirq; | |
293 | char *comm; | |
294 | ||
295 | comm = trace_find_cmdline(entry->pid); | |
c4a8e8be FW |
296 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
297 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 ACM |
298 | |
299 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d%c%c%c", | |
300 | comm, entry->pid, cpu, | |
301 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
302 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? | |
303 | 'X' : '.', | |
304 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? | |
305 | 'N' : '.', | |
306 | (hardirq && softirq) ? 'H' : | |
307 | hardirq ? 'h' : softirq ? 's' : '.')) | |
308 | return 0; | |
c4a8e8be FW |
309 | |
310 | if (entry->preempt_count) | |
d9793bd8 ACM |
311 | return trace_seq_printf(s, "%x", entry->preempt_count); |
312 | return trace_seq_puts(s, "."); | |
c4a8e8be FW |
313 | } |
314 | ||
315 | static unsigned long preempt_mark_thresh = 100; | |
316 | ||
d9793bd8 | 317 | static int |
c4a8e8be FW |
318 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
319 | unsigned long rel_usecs) | |
320 | { | |
d9793bd8 ACM |
321 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
322 | rel_usecs > preempt_mark_thresh ? '!' : | |
323 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
324 | } |
325 | ||
326 | int trace_print_context(struct trace_iterator *iter) | |
327 | { | |
328 | struct trace_seq *s = &iter->seq; | |
329 | struct trace_entry *entry = iter->ent; | |
330 | char *comm = trace_find_cmdline(entry->pid); | |
331 | unsigned long long t = ns2usecs(iter->ts); | |
332 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
333 | unsigned long secs = (unsigned long)t; | |
334 | ||
d9793bd8 ACM |
335 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
336 | comm, entry->pid, entry->cpu, secs, usec_rem); | |
c4a8e8be FW |
337 | } |
338 | ||
339 | int trace_print_lat_context(struct trace_iterator *iter) | |
340 | { | |
341 | u64 next_ts; | |
d9793bd8 | 342 | int ret; |
c4a8e8be FW |
343 | struct trace_seq *s = &iter->seq; |
344 | struct trace_entry *entry = iter->ent, | |
345 | *next_entry = trace_find_next_entry(iter, NULL, | |
346 | &next_ts); | |
347 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
348 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
349 | unsigned long rel_usecs; | |
350 | ||
351 | if (!next_entry) | |
352 | next_ts = iter->ts; | |
353 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
354 | ||
355 | if (verbose) { | |
356 | char *comm = trace_find_cmdline(entry->pid); | |
d9793bd8 ACM |
357 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08lx]" |
358 | " %ld.%03ldms (+%ld.%03ldms): ", comm, | |
359 | entry->pid, entry->cpu, entry->flags, | |
360 | entry->preempt_count, iter->idx, | |
361 | ns2usecs(iter->ts), | |
362 | abs_usecs / USEC_PER_MSEC, | |
363 | abs_usecs % USEC_PER_MSEC, | |
364 | rel_usecs / USEC_PER_MSEC, | |
365 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 366 | } else { |
d9793bd8 ACM |
367 | ret = lat_print_generic(s, entry, entry->cpu); |
368 | if (ret) | |
369 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
370 | } |
371 | ||
d9793bd8 | 372 | return ret; |
c4a8e8be FW |
373 | } |
374 | ||
f633cef0 SR |
375 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
376 | ||
377 | static int task_state_char(unsigned long state) | |
378 | { | |
379 | int bit = state ? __ffs(state) + 1 : 0; | |
380 | ||
381 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
382 | } | |
383 | ||
f0868d1e SR |
384 | /** |
385 | * ftrace_find_event - find a registered event | |
386 | * @type: the type of event to look for | |
387 | * | |
388 | * Returns an event of type @type otherwise NULL | |
389 | */ | |
390 | struct trace_event *ftrace_find_event(int type) | |
391 | { | |
392 | struct trace_event *event; | |
393 | struct hlist_node *n; | |
394 | unsigned key; | |
395 | ||
396 | key = type & (EVENT_HASHSIZE - 1); | |
397 | ||
398 | hlist_for_each_entry_rcu(event, n, &event_hash[key], node) { | |
399 | if (event->type == type) | |
400 | return event; | |
401 | } | |
402 | ||
403 | return NULL; | |
404 | } | |
405 | ||
406 | /** | |
407 | * register_ftrace_event - register output for an event type | |
408 | * @event: the event type to register | |
409 | * | |
410 | * Event types are stored in a hash and this hash is used to | |
411 | * find a way to print an event. If the @event->type is set | |
412 | * then it will use that type, otherwise it will assign a | |
413 | * type to use. | |
414 | * | |
415 | * If you assign your own type, please make sure it is added | |
416 | * to the trace_type enum in trace.h, to avoid collisions | |
417 | * with the dynamic types. | |
418 | * | |
419 | * Returns the event type number or zero on error. | |
420 | */ | |
421 | int register_ftrace_event(struct trace_event *event) | |
422 | { | |
423 | unsigned key; | |
424 | int ret = 0; | |
425 | ||
426 | mutex_lock(&trace_event_mutex); | |
427 | ||
428 | if (!event->type) | |
429 | event->type = next_event_type++; | |
430 | else if (event->type > __TRACE_LAST_TYPE) { | |
431 | printk(KERN_WARNING "Need to add type to trace.h\n"); | |
432 | WARN_ON(1); | |
433 | } | |
434 | ||
435 | if (ftrace_find_event(event->type)) | |
436 | goto out; | |
437 | ||
438 | key = event->type & (EVENT_HASHSIZE - 1); | |
439 | ||
440 | hlist_add_head_rcu(&event->node, &event_hash[key]); | |
441 | ||
442 | ret = event->type; | |
443 | out: | |
444 | mutex_unlock(&trace_event_mutex); | |
445 | ||
446 | return ret; | |
447 | } | |
448 | ||
449 | /** | |
450 | * unregister_ftrace_event - remove a no longer used event | |
451 | * @event: the event to remove | |
452 | */ | |
453 | int unregister_ftrace_event(struct trace_event *event) | |
454 | { | |
455 | mutex_lock(&trace_event_mutex); | |
456 | hlist_del(&event->node); | |
457 | mutex_unlock(&trace_event_mutex); | |
458 | ||
459 | return 0; | |
460 | } | |
f633cef0 SR |
461 | |
462 | /* | |
463 | * Standard events | |
464 | */ | |
465 | ||
2c9b238e | 466 | int trace_nop_print(struct trace_iterator *iter, int flags) |
f633cef0 | 467 | { |
d9793bd8 | 468 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
469 | } |
470 | ||
471 | /* TRACE_FN */ | |
2c9b238e | 472 | static int trace_fn_latency(struct trace_iterator *iter, int flags) |
f633cef0 SR |
473 | { |
474 | struct ftrace_entry *field; | |
2c9b238e | 475 | struct trace_seq *s = &iter->seq; |
f633cef0 | 476 | |
2c9b238e | 477 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
478 | |
479 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
480 | goto partial; | |
481 | if (!trace_seq_puts(s, " (")) | |
482 | goto partial; | |
483 | if (!seq_print_ip_sym(s, field->parent_ip, flags)) | |
484 | goto partial; | |
485 | if (!trace_seq_puts(s, ")\n")) | |
486 | goto partial; | |
487 | ||
d9793bd8 | 488 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
489 | |
490 | partial: | |
491 | return TRACE_TYPE_PARTIAL_LINE; | |
492 | } | |
493 | ||
2c9b238e | 494 | static int trace_fn_trace(struct trace_iterator *iter, int flags) |
f633cef0 SR |
495 | { |
496 | struct ftrace_entry *field; | |
2c9b238e | 497 | struct trace_seq *s = &iter->seq; |
f633cef0 | 498 | |
2c9b238e | 499 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
500 | |
501 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
502 | goto partial; | |
503 | ||
504 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
505 | if (!trace_seq_printf(s, " <-")) | |
506 | goto partial; | |
507 | if (!seq_print_ip_sym(s, | |
508 | field->parent_ip, | |
509 | flags)) | |
510 | goto partial; | |
511 | } | |
512 | if (!trace_seq_printf(s, "\n")) | |
513 | goto partial; | |
514 | ||
d9793bd8 | 515 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
516 | |
517 | partial: | |
518 | return TRACE_TYPE_PARTIAL_LINE; | |
519 | } | |
520 | ||
2c9b238e | 521 | static int trace_fn_raw(struct trace_iterator *iter, int flags) |
f633cef0 SR |
522 | { |
523 | struct ftrace_entry *field; | |
524 | ||
2c9b238e | 525 | trace_assign_type(field, iter->ent); |
f633cef0 | 526 | |
2c9b238e | 527 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
528 | field->ip, |
529 | field->parent_ip)) | |
f633cef0 SR |
530 | return TRACE_TYPE_PARTIAL_LINE; |
531 | ||
d9793bd8 | 532 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
533 | } |
534 | ||
2c9b238e | 535 | static int trace_fn_hex(struct trace_iterator *iter, int flags) |
f633cef0 SR |
536 | { |
537 | struct ftrace_entry *field; | |
2c9b238e | 538 | struct trace_seq *s = &iter->seq; |
f633cef0 | 539 | |
2c9b238e | 540 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
541 | |
542 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
543 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
544 | ||
d9793bd8 | 545 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
546 | } |
547 | ||
2c9b238e | 548 | static int trace_fn_bin(struct trace_iterator *iter, int flags) |
f633cef0 SR |
549 | { |
550 | struct ftrace_entry *field; | |
2c9b238e | 551 | struct trace_seq *s = &iter->seq; |
f633cef0 | 552 | |
2c9b238e | 553 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
554 | |
555 | SEQ_PUT_FIELD_RET(s, field->ip); | |
556 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
557 | ||
d9793bd8 | 558 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
559 | } |
560 | ||
561 | static struct trace_event trace_fn_event = { | |
562 | .type = TRACE_FN, | |
563 | .trace = trace_fn_trace, | |
564 | .latency_trace = trace_fn_latency, | |
565 | .raw = trace_fn_raw, | |
566 | .hex = trace_fn_hex, | |
567 | .binary = trace_fn_bin, | |
568 | }; | |
569 | ||
570 | /* TRACE_CTX an TRACE_WAKE */ | |
2c9b238e | 571 | static int trace_ctxwake_print(struct trace_iterator *iter, char *delim) |
f633cef0 SR |
572 | { |
573 | struct ctx_switch_entry *field; | |
574 | char *comm; | |
575 | int S, T; | |
576 | ||
2c9b238e | 577 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
578 | |
579 | T = task_state_char(field->next_state); | |
580 | S = task_state_char(field->prev_state); | |
581 | comm = trace_find_cmdline(field->next_pid); | |
2c9b238e ACM |
582 | if (!trace_seq_printf(&iter->seq, |
583 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
584 | field->prev_pid, |
585 | field->prev_prio, | |
586 | S, delim, | |
587 | field->next_cpu, | |
588 | field->next_pid, | |
589 | field->next_prio, | |
590 | T, comm)) | |
f633cef0 SR |
591 | return TRACE_TYPE_PARTIAL_LINE; |
592 | ||
d9793bd8 | 593 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
594 | } |
595 | ||
2c9b238e | 596 | static int trace_ctx_print(struct trace_iterator *iter, int flags) |
f633cef0 | 597 | { |
2c9b238e | 598 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
599 | } |
600 | ||
2c9b238e | 601 | static int trace_wake_print(struct trace_iterator *iter, int flags) |
f633cef0 | 602 | { |
2c9b238e | 603 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
604 | } |
605 | ||
2c9b238e | 606 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
607 | { |
608 | struct ctx_switch_entry *field; | |
609 | int T; | |
610 | ||
2c9b238e | 611 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
612 | |
613 | if (!S) | |
614 | task_state_char(field->prev_state); | |
615 | T = task_state_char(field->next_state); | |
2c9b238e | 616 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
617 | field->prev_pid, |
618 | field->prev_prio, | |
619 | S, | |
620 | field->next_cpu, | |
621 | field->next_pid, | |
622 | field->next_prio, | |
623 | T)) | |
f633cef0 SR |
624 | return TRACE_TYPE_PARTIAL_LINE; |
625 | ||
d9793bd8 | 626 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
627 | } |
628 | ||
2c9b238e | 629 | static int trace_ctx_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 630 | { |
2c9b238e | 631 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
632 | } |
633 | ||
2c9b238e | 634 | static int trace_wake_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 635 | { |
2c9b238e | 636 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
637 | } |
638 | ||
639 | ||
2c9b238e | 640 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
641 | { |
642 | struct ctx_switch_entry *field; | |
2c9b238e | 643 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
644 | int T; |
645 | ||
2c9b238e | 646 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
647 | |
648 | if (!S) | |
649 | task_state_char(field->prev_state); | |
650 | T = task_state_char(field->next_state); | |
651 | ||
652 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
653 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
654 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
655 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
656 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
657 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
658 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
659 | ||
d9793bd8 | 660 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
661 | } |
662 | ||
2c9b238e | 663 | static int trace_ctx_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 664 | { |
2c9b238e | 665 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
666 | } |
667 | ||
2c9b238e | 668 | static int trace_wake_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 669 | { |
2c9b238e | 670 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
671 | } |
672 | ||
2c9b238e | 673 | static int trace_ctxwake_bin(struct trace_iterator *iter, int flags) |
f633cef0 SR |
674 | { |
675 | struct ctx_switch_entry *field; | |
2c9b238e | 676 | struct trace_seq *s = &iter->seq; |
f633cef0 | 677 | |
2c9b238e | 678 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
679 | |
680 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
681 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
682 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
683 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
684 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
685 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
686 | ||
d9793bd8 | 687 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
688 | } |
689 | ||
690 | static struct trace_event trace_ctx_event = { | |
691 | .type = TRACE_CTX, | |
692 | .trace = trace_ctx_print, | |
693 | .latency_trace = trace_ctx_print, | |
694 | .raw = trace_ctx_raw, | |
695 | .hex = trace_ctx_hex, | |
696 | .binary = trace_ctxwake_bin, | |
697 | }; | |
698 | ||
699 | static struct trace_event trace_wake_event = { | |
700 | .type = TRACE_WAKE, | |
701 | .trace = trace_wake_print, | |
702 | .latency_trace = trace_wake_print, | |
703 | .raw = trace_wake_raw, | |
704 | .hex = trace_wake_hex, | |
705 | .binary = trace_ctxwake_bin, | |
706 | }; | |
707 | ||
708 | /* TRACE_SPECIAL */ | |
2c9b238e | 709 | static int trace_special_print(struct trace_iterator *iter, int flags) |
f633cef0 SR |
710 | { |
711 | struct special_entry *field; | |
712 | ||
2c9b238e | 713 | trace_assign_type(field, iter->ent); |
f633cef0 | 714 | |
2c9b238e | 715 | if (!trace_seq_printf(&iter->seq, "# %ld %ld %ld\n", |
6c1a99af LJ |
716 | field->arg1, |
717 | field->arg2, | |
718 | field->arg3)) | |
f633cef0 SR |
719 | return TRACE_TYPE_PARTIAL_LINE; |
720 | ||
d9793bd8 | 721 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
722 | } |
723 | ||
2c9b238e | 724 | static int trace_special_hex(struct trace_iterator *iter, int flags) |
f633cef0 SR |
725 | { |
726 | struct special_entry *field; | |
2c9b238e | 727 | struct trace_seq *s = &iter->seq; |
f633cef0 | 728 | |
2c9b238e | 729 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
730 | |
731 | SEQ_PUT_HEX_FIELD_RET(s, field->arg1); | |
732 | SEQ_PUT_HEX_FIELD_RET(s, field->arg2); | |
733 | SEQ_PUT_HEX_FIELD_RET(s, field->arg3); | |
734 | ||
d9793bd8 | 735 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
736 | } |
737 | ||
2c9b238e | 738 | static int trace_special_bin(struct trace_iterator *iter, int flags) |
f633cef0 SR |
739 | { |
740 | struct special_entry *field; | |
2c9b238e | 741 | struct trace_seq *s = &iter->seq; |
f633cef0 | 742 | |
2c9b238e | 743 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
744 | |
745 | SEQ_PUT_FIELD_RET(s, field->arg1); | |
746 | SEQ_PUT_FIELD_RET(s, field->arg2); | |
747 | SEQ_PUT_FIELD_RET(s, field->arg3); | |
748 | ||
d9793bd8 | 749 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
750 | } |
751 | ||
752 | static struct trace_event trace_special_event = { | |
753 | .type = TRACE_SPECIAL, | |
754 | .trace = trace_special_print, | |
755 | .latency_trace = trace_special_print, | |
756 | .raw = trace_special_print, | |
757 | .hex = trace_special_hex, | |
758 | .binary = trace_special_bin, | |
759 | }; | |
760 | ||
761 | /* TRACE_STACK */ | |
762 | ||
2c9b238e | 763 | static int trace_stack_print(struct trace_iterator *iter, int flags) |
f633cef0 SR |
764 | { |
765 | struct stack_entry *field; | |
2c9b238e | 766 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
767 | int i; |
768 | ||
2c9b238e | 769 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
770 | |
771 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
772 | if (i) { | |
6c1a99af | 773 | if (!trace_seq_puts(s, " <= ")) |
f633cef0 SR |
774 | goto partial; |
775 | ||
6c1a99af | 776 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
f633cef0 SR |
777 | goto partial; |
778 | } | |
6c1a99af | 779 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
780 | goto partial; |
781 | } | |
782 | ||
d9793bd8 | 783 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
784 | |
785 | partial: | |
786 | return TRACE_TYPE_PARTIAL_LINE; | |
787 | } | |
788 | ||
789 | static struct trace_event trace_stack_event = { | |
790 | .type = TRACE_STACK, | |
791 | .trace = trace_stack_print, | |
792 | .latency_trace = trace_stack_print, | |
793 | .raw = trace_special_print, | |
794 | .hex = trace_special_hex, | |
795 | .binary = trace_special_bin, | |
796 | }; | |
797 | ||
798 | /* TRACE_USER_STACK */ | |
2c9b238e | 799 | static int trace_user_stack_print(struct trace_iterator *iter, int flags) |
f633cef0 SR |
800 | { |
801 | struct userstack_entry *field; | |
2c9b238e | 802 | struct trace_seq *s = &iter->seq; |
f633cef0 | 803 | |
2c9b238e | 804 | trace_assign_type(field, iter->ent); |
f633cef0 | 805 | |
6c1a99af | 806 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
807 | goto partial; |
808 | ||
6c1a99af | 809 | if (!trace_seq_putc(s, '\n')) |
f633cef0 SR |
810 | goto partial; |
811 | ||
d9793bd8 | 812 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
813 | |
814 | partial: | |
815 | return TRACE_TYPE_PARTIAL_LINE; | |
816 | } | |
817 | ||
818 | static struct trace_event trace_user_stack_event = { | |
819 | .type = TRACE_USER_STACK, | |
820 | .trace = trace_user_stack_print, | |
821 | .latency_trace = trace_user_stack_print, | |
822 | .raw = trace_special_print, | |
823 | .hex = trace_special_hex, | |
824 | .binary = trace_special_bin, | |
825 | }; | |
826 | ||
827 | /* TRACE_PRINT */ | |
2c9b238e | 828 | static int trace_print_print(struct trace_iterator *iter, int flags) |
f633cef0 SR |
829 | { |
830 | struct print_entry *field; | |
2c9b238e | 831 | struct trace_seq *s = &iter->seq; |
f633cef0 | 832 | |
2c9b238e | 833 | trace_assign_type(field, iter->ent); |
f633cef0 | 834 | |
6c1a99af | 835 | if (!seq_print_ip_sym(s, field->ip, flags)) |
f633cef0 SR |
836 | goto partial; |
837 | ||
6c1a99af | 838 | if (!trace_seq_printf(s, ": %s", field->buf)) |
f633cef0 SR |
839 | goto partial; |
840 | ||
d9793bd8 | 841 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
842 | |
843 | partial: | |
844 | return TRACE_TYPE_PARTIAL_LINE; | |
845 | } | |
846 | ||
2c9b238e | 847 | static int trace_print_raw(struct trace_iterator *iter, int flags) |
f633cef0 SR |
848 | { |
849 | struct print_entry *field; | |
850 | ||
2c9b238e | 851 | trace_assign_type(field, iter->ent); |
f633cef0 | 852 | |
2c9b238e | 853 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) |
f633cef0 SR |
854 | goto partial; |
855 | ||
d9793bd8 | 856 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
857 | |
858 | partial: | |
859 | return TRACE_TYPE_PARTIAL_LINE; | |
860 | } | |
861 | ||
862 | static struct trace_event trace_print_event = { | |
863 | .type = TRACE_PRINT, | |
864 | .trace = trace_print_print, | |
865 | .latency_trace = trace_print_print, | |
866 | .raw = trace_print_raw, | |
867 | .hex = trace_nop_print, | |
868 | .binary = trace_nop_print, | |
869 | }; | |
870 | ||
871 | static struct trace_event *events[] __initdata = { | |
872 | &trace_fn_event, | |
873 | &trace_ctx_event, | |
874 | &trace_wake_event, | |
875 | &trace_special_event, | |
876 | &trace_stack_event, | |
877 | &trace_user_stack_event, | |
878 | &trace_print_event, | |
879 | NULL | |
880 | }; | |
881 | ||
882 | __init static int init_events(void) | |
883 | { | |
884 | struct trace_event *event; | |
885 | int i, ret; | |
886 | ||
887 | for (i = 0; events[i]; i++) { | |
888 | event = events[i]; | |
889 | ||
890 | ret = register_ftrace_event(event); | |
891 | if (!ret) { | |
892 | printk(KERN_WARNING "event %d failed to register\n", | |
893 | event->type); | |
894 | WARN_ON_ONCE(1); | |
895 | } | |
896 | } | |
897 | ||
898 | return 0; | |
899 | } | |
900 | device_initcall(init_events); |