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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 | ||
0706f1c4 SR |
22 | void trace_print_seq(struct seq_file *m, struct trace_seq *s) |
23 | { | |
24 | int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len; | |
25 | ||
26 | s->buffer[len] = 0; | |
27 | seq_puts(m, s->buffer); | |
28 | ||
29 | trace_seq_init(s); | |
30 | } | |
31 | ||
5ef841f6 SR |
32 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
33 | { | |
34 | struct trace_seq *s = &iter->seq; | |
35 | struct trace_entry *entry = iter->ent; | |
36 | struct bprint_entry *field; | |
37 | int ret; | |
38 | ||
39 | trace_assign_type(field, entry); | |
40 | ||
41 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
42 | if (!ret) | |
43 | return TRACE_TYPE_PARTIAL_LINE; | |
44 | ||
45 | return TRACE_TYPE_HANDLED; | |
46 | } | |
47 | ||
48 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
49 | { | |
50 | struct trace_seq *s = &iter->seq; | |
51 | struct trace_entry *entry = iter->ent; | |
52 | struct print_entry *field; | |
53 | int ret; | |
54 | ||
55 | trace_assign_type(field, entry); | |
56 | ||
57 | ret = trace_seq_printf(s, "%s", field->buf); | |
58 | if (!ret) | |
59 | return TRACE_TYPE_PARTIAL_LINE; | |
60 | ||
61 | return TRACE_TYPE_HANDLED; | |
62 | } | |
63 | ||
f0868d1e SR |
64 | /** |
65 | * trace_seq_printf - sequence printing of trace information | |
66 | * @s: trace sequence descriptor | |
67 | * @fmt: printf format string | |
68 | * | |
69 | * The tracer may use either sequence operations or its own | |
70 | * copy to user routines. To simplify formating of a trace | |
71 | * trace_seq_printf is used to store strings into a special | |
72 | * buffer (@s). Then the output may be either used by | |
73 | * the sequencer or pulled into another buffer. | |
74 | */ | |
75 | int | |
76 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
77 | { | |
78 | int len = (PAGE_SIZE - 1) - s->len; | |
79 | va_list ap; | |
80 | int ret; | |
81 | ||
82 | if (!len) | |
83 | return 0; | |
84 | ||
85 | va_start(ap, fmt); | |
86 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
87 | va_end(ap); | |
88 | ||
89 | /* If we can't write it all, don't bother writing anything */ | |
90 | if (ret >= len) | |
91 | return 0; | |
92 | ||
93 | s->len += ret; | |
94 | ||
95 | return len; | |
96 | } | |
97 | ||
769b0441 | 98 | int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
1427cdf0 LJ |
99 | { |
100 | int len = (PAGE_SIZE - 1) - s->len; | |
101 | int ret; | |
102 | ||
103 | if (!len) | |
104 | return 0; | |
105 | ||
106 | ret = bstr_printf(s->buffer + s->len, len, fmt, binary); | |
107 | ||
108 | /* If we can't write it all, don't bother writing anything */ | |
109 | if (ret >= len) | |
110 | return 0; | |
111 | ||
112 | s->len += ret; | |
113 | ||
114 | return len; | |
115 | } | |
116 | ||
f0868d1e SR |
117 | /** |
118 | * trace_seq_puts - trace sequence printing of simple string | |
119 | * @s: trace sequence descriptor | |
120 | * @str: simple string to record | |
121 | * | |
122 | * The tracer may use either the sequence operations or its own | |
123 | * copy to user routines. This function records a simple string | |
124 | * into a special buffer (@s) for later retrieval by a sequencer | |
125 | * or other mechanism. | |
126 | */ | |
127 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
128 | { | |
129 | int len = strlen(str); | |
130 | ||
131 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
132 | return 0; | |
133 | ||
134 | memcpy(s->buffer + s->len, str, len); | |
135 | s->len += len; | |
136 | ||
137 | return len; | |
138 | } | |
139 | ||
140 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
141 | { | |
142 | if (s->len >= (PAGE_SIZE - 1)) | |
143 | return 0; | |
144 | ||
145 | s->buffer[s->len++] = c; | |
146 | ||
147 | return 1; | |
148 | } | |
149 | ||
b14b70a6 | 150 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
151 | { |
152 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
153 | return 0; | |
154 | ||
155 | memcpy(s->buffer + s->len, mem, len); | |
156 | s->len += len; | |
157 | ||
158 | return len; | |
159 | } | |
160 | ||
b14b70a6 | 161 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
162 | { |
163 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 164 | const unsigned char *data = mem; |
f0868d1e SR |
165 | int i, j; |
166 | ||
167 | #ifdef __BIG_ENDIAN | |
168 | for (i = 0, j = 0; i < len; i++) { | |
169 | #else | |
170 | for (i = len-1, j = 0; i >= 0; i--) { | |
171 | #endif | |
172 | hex[j++] = hex_asc_hi(data[i]); | |
173 | hex[j++] = hex_asc_lo(data[i]); | |
174 | } | |
175 | hex[j++] = ' '; | |
176 | ||
177 | return trace_seq_putmem(s, hex, j); | |
178 | } | |
179 | ||
bdd6df6a EGM |
180 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
181 | { | |
182 | void *ret; | |
183 | ||
184 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
185 | return NULL; | |
186 | ||
187 | ret = s->buffer + s->len; | |
188 | s->len += len; | |
189 | ||
190 | return ret; | |
191 | } | |
192 | ||
f0868d1e SR |
193 | int trace_seq_path(struct trace_seq *s, struct path *path) |
194 | { | |
195 | unsigned char *p; | |
196 | ||
197 | if (s->len >= (PAGE_SIZE - 1)) | |
198 | return 0; | |
199 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); | |
200 | if (!IS_ERR(p)) { | |
201 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
202 | if (p) { | |
203 | s->len = p - s->buffer; | |
204 | return 1; | |
205 | } | |
206 | } else { | |
207 | s->buffer[s->len++] = '?'; | |
208 | return 1; | |
209 | } | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | #ifdef CONFIG_KRETPROBES | |
215 | static inline const char *kretprobed(const char *name) | |
216 | { | |
217 | static const char tramp_name[] = "kretprobe_trampoline"; | |
218 | int size = sizeof(tramp_name); | |
219 | ||
220 | if (strncmp(tramp_name, name, size) == 0) | |
221 | return "[unknown/kretprobe'd]"; | |
222 | return name; | |
223 | } | |
224 | #else | |
225 | static inline const char *kretprobed(const char *name) | |
226 | { | |
227 | return name; | |
228 | } | |
229 | #endif /* CONFIG_KRETPROBES */ | |
230 | ||
231 | static int | |
232 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
233 | { | |
234 | #ifdef CONFIG_KALLSYMS | |
235 | char str[KSYM_SYMBOL_LEN]; | |
236 | const char *name; | |
237 | ||
238 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
239 | ||
240 | name = kretprobed(str); | |
241 | ||
242 | return trace_seq_printf(s, fmt, name); | |
243 | #endif | |
244 | return 1; | |
245 | } | |
246 | ||
247 | static int | |
248 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
249 | unsigned long address) | |
250 | { | |
251 | #ifdef CONFIG_KALLSYMS | |
252 | char str[KSYM_SYMBOL_LEN]; | |
253 | const char *name; | |
254 | ||
255 | sprint_symbol(str, address); | |
256 | name = kretprobed(str); | |
257 | ||
258 | return trace_seq_printf(s, fmt, name); | |
259 | #endif | |
260 | return 1; | |
261 | } | |
262 | ||
263 | #ifndef CONFIG_64BIT | |
264 | # define IP_FMT "%08lx" | |
265 | #else | |
266 | # define IP_FMT "%016lx" | |
267 | #endif | |
268 | ||
269 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
270 | unsigned long ip, unsigned long sym_flags) | |
271 | { | |
272 | struct file *file = NULL; | |
273 | unsigned long vmstart = 0; | |
274 | int ret = 1; | |
275 | ||
276 | if (mm) { | |
277 | const struct vm_area_struct *vma; | |
278 | ||
279 | down_read(&mm->mmap_sem); | |
280 | vma = find_vma(mm, ip); | |
281 | if (vma) { | |
282 | file = vma->vm_file; | |
283 | vmstart = vma->vm_start; | |
284 | } | |
285 | if (file) { | |
286 | ret = trace_seq_path(s, &file->f_path); | |
287 | if (ret) | |
288 | ret = trace_seq_printf(s, "[+0x%lx]", | |
289 | ip - vmstart); | |
290 | } | |
291 | up_read(&mm->mmap_sem); | |
292 | } | |
293 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
294 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
295 | return ret; | |
296 | } | |
297 | ||
298 | int | |
299 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
300 | unsigned long sym_flags) | |
301 | { | |
302 | struct mm_struct *mm = NULL; | |
303 | int ret = 1; | |
304 | unsigned int i; | |
305 | ||
306 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
307 | struct task_struct *task; | |
308 | /* | |
309 | * we do the lookup on the thread group leader, | |
310 | * since individual threads might have already quit! | |
311 | */ | |
312 | rcu_read_lock(); | |
313 | task = find_task_by_vpid(entry->ent.tgid); | |
314 | if (task) | |
315 | mm = get_task_mm(task); | |
316 | rcu_read_unlock(); | |
317 | } | |
318 | ||
319 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
320 | unsigned long ip = entry->caller[i]; | |
321 | ||
322 | if (ip == ULONG_MAX || !ret) | |
323 | break; | |
324 | if (i && ret) | |
325 | ret = trace_seq_puts(s, " <- "); | |
326 | if (!ip) { | |
327 | if (ret) | |
328 | ret = trace_seq_puts(s, "??"); | |
329 | continue; | |
330 | } | |
331 | if (!ret) | |
332 | break; | |
333 | if (ret) | |
334 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
335 | } | |
336 | ||
337 | if (mm) | |
338 | mmput(mm); | |
339 | return ret; | |
340 | } | |
341 | ||
342 | int | |
343 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
344 | { | |
345 | int ret; | |
346 | ||
347 | if (!ip) | |
348 | return trace_seq_printf(s, "0"); | |
349 | ||
350 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
351 | ret = seq_print_sym_offset(s, "%s", ip); | |
352 | else | |
353 | ret = seq_print_sym_short(s, "%s", ip); | |
354 | ||
355 | if (!ret) | |
356 | return 0; | |
357 | ||
358 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
359 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
360 | return ret; | |
361 | } | |
362 | ||
d9793bd8 | 363 | static int |
c4a8e8be FW |
364 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) |
365 | { | |
366 | int hardirq, softirq; | |
4ca53085 | 367 | char comm[TASK_COMM_LEN]; |
c4a8e8be | 368 | |
4ca53085 | 369 | trace_find_cmdline(entry->pid, comm); |
c4a8e8be FW |
370 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
371 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 ACM |
372 | |
373 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d%c%c%c", | |
374 | comm, entry->pid, cpu, | |
375 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
376 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? | |
377 | 'X' : '.', | |
378 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? | |
379 | 'N' : '.', | |
380 | (hardirq && softirq) ? 'H' : | |
381 | hardirq ? 'h' : softirq ? 's' : '.')) | |
382 | return 0; | |
c4a8e8be FW |
383 | |
384 | if (entry->preempt_count) | |
d9793bd8 ACM |
385 | return trace_seq_printf(s, "%x", entry->preempt_count); |
386 | return trace_seq_puts(s, "."); | |
c4a8e8be FW |
387 | } |
388 | ||
389 | static unsigned long preempt_mark_thresh = 100; | |
390 | ||
d9793bd8 | 391 | static int |
c4a8e8be FW |
392 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
393 | unsigned long rel_usecs) | |
394 | { | |
d9793bd8 ACM |
395 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
396 | rel_usecs > preempt_mark_thresh ? '!' : | |
397 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
398 | } |
399 | ||
400 | int trace_print_context(struct trace_iterator *iter) | |
401 | { | |
402 | struct trace_seq *s = &iter->seq; | |
403 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
404 | unsigned long long t = ns2usecs(iter->ts); |
405 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
406 | unsigned long secs = (unsigned long)t; | |
4ca53085 SR |
407 | char comm[TASK_COMM_LEN]; |
408 | ||
409 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 410 | |
d9793bd8 | 411 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
1830b52d | 412 | comm, entry->pid, iter->cpu, secs, usec_rem); |
c4a8e8be FW |
413 | } |
414 | ||
415 | int trace_print_lat_context(struct trace_iterator *iter) | |
416 | { | |
417 | u64 next_ts; | |
d9793bd8 | 418 | int ret; |
c4a8e8be FW |
419 | struct trace_seq *s = &iter->seq; |
420 | struct trace_entry *entry = iter->ent, | |
421 | *next_entry = trace_find_next_entry(iter, NULL, | |
422 | &next_ts); | |
423 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
424 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
425 | unsigned long rel_usecs; | |
426 | ||
427 | if (!next_entry) | |
428 | next_ts = iter->ts; | |
429 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
430 | ||
431 | if (verbose) { | |
4ca53085 SR |
432 | char comm[TASK_COMM_LEN]; |
433 | ||
434 | trace_find_cmdline(entry->pid, comm); | |
435 | ||
cf8e3474 | 436 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 437 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 438 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
439 | entry->preempt_count, iter->idx, |
440 | ns2usecs(iter->ts), | |
441 | abs_usecs / USEC_PER_MSEC, | |
442 | abs_usecs % USEC_PER_MSEC, | |
443 | rel_usecs / USEC_PER_MSEC, | |
444 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 445 | } else { |
1830b52d | 446 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
447 | if (ret) |
448 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
449 | } |
450 | ||
d9793bd8 | 451 | return ret; |
c4a8e8be FW |
452 | } |
453 | ||
f633cef0 SR |
454 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
455 | ||
456 | static int task_state_char(unsigned long state) | |
457 | { | |
458 | int bit = state ? __ffs(state) + 1 : 0; | |
459 | ||
460 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
461 | } | |
462 | ||
f0868d1e SR |
463 | /** |
464 | * ftrace_find_event - find a registered event | |
465 | * @type: the type of event to look for | |
466 | * | |
467 | * Returns an event of type @type otherwise NULL | |
468 | */ | |
469 | struct trace_event *ftrace_find_event(int type) | |
470 | { | |
471 | struct trace_event *event; | |
472 | struct hlist_node *n; | |
473 | unsigned key; | |
474 | ||
475 | key = type & (EVENT_HASHSIZE - 1); | |
476 | ||
477 | hlist_for_each_entry_rcu(event, n, &event_hash[key], node) { | |
478 | if (event->type == type) | |
479 | return event; | |
480 | } | |
481 | ||
482 | return NULL; | |
483 | } | |
484 | ||
485 | /** | |
486 | * register_ftrace_event - register output for an event type | |
487 | * @event: the event type to register | |
488 | * | |
489 | * Event types are stored in a hash and this hash is used to | |
490 | * find a way to print an event. If the @event->type is set | |
491 | * then it will use that type, otherwise it will assign a | |
492 | * type to use. | |
493 | * | |
494 | * If you assign your own type, please make sure it is added | |
495 | * to the trace_type enum in trace.h, to avoid collisions | |
496 | * with the dynamic types. | |
497 | * | |
498 | * Returns the event type number or zero on error. | |
499 | */ | |
500 | int register_ftrace_event(struct trace_event *event) | |
501 | { | |
502 | unsigned key; | |
503 | int ret = 0; | |
504 | ||
505 | mutex_lock(&trace_event_mutex); | |
506 | ||
28bea271 PZ |
507 | if (!event) { |
508 | ret = next_event_type++; | |
509 | goto out; | |
510 | } | |
511 | ||
f0868d1e SR |
512 | if (!event->type) |
513 | event->type = next_event_type++; | |
514 | else if (event->type > __TRACE_LAST_TYPE) { | |
515 | printk(KERN_WARNING "Need to add type to trace.h\n"); | |
516 | WARN_ON(1); | |
517 | } | |
518 | ||
519 | if (ftrace_find_event(event->type)) | |
520 | goto out; | |
521 | ||
268ccda0 ACM |
522 | if (event->trace == NULL) |
523 | event->trace = trace_nop_print; | |
268ccda0 ACM |
524 | if (event->raw == NULL) |
525 | event->raw = trace_nop_print; | |
526 | if (event->hex == NULL) | |
527 | event->hex = trace_nop_print; | |
528 | if (event->binary == NULL) | |
529 | event->binary = trace_nop_print; | |
530 | ||
f0868d1e SR |
531 | key = event->type & (EVENT_HASHSIZE - 1); |
532 | ||
533 | hlist_add_head_rcu(&event->node, &event_hash[key]); | |
534 | ||
535 | ret = event->type; | |
536 | out: | |
537 | mutex_unlock(&trace_event_mutex); | |
538 | ||
539 | return ret; | |
540 | } | |
541 | ||
542 | /** | |
543 | * unregister_ftrace_event - remove a no longer used event | |
544 | * @event: the event to remove | |
545 | */ | |
546 | int unregister_ftrace_event(struct trace_event *event) | |
547 | { | |
548 | mutex_lock(&trace_event_mutex); | |
549 | hlist_del(&event->node); | |
550 | mutex_unlock(&trace_event_mutex); | |
551 | ||
552 | return 0; | |
553 | } | |
f633cef0 SR |
554 | |
555 | /* | |
556 | * Standard events | |
557 | */ | |
558 | ||
ae7462b4 | 559 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags) |
f633cef0 | 560 | { |
d9793bd8 | 561 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
562 | } |
563 | ||
564 | /* TRACE_FN */ | |
ae7462b4 | 565 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags) |
f633cef0 SR |
566 | { |
567 | struct ftrace_entry *field; | |
2c9b238e | 568 | struct trace_seq *s = &iter->seq; |
f633cef0 | 569 | |
2c9b238e | 570 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
571 | |
572 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
573 | goto partial; | |
574 | ||
575 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
576 | if (!trace_seq_printf(s, " <-")) | |
577 | goto partial; | |
578 | if (!seq_print_ip_sym(s, | |
579 | field->parent_ip, | |
580 | flags)) | |
581 | goto partial; | |
582 | } | |
583 | if (!trace_seq_printf(s, "\n")) | |
584 | goto partial; | |
585 | ||
d9793bd8 | 586 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
587 | |
588 | partial: | |
589 | return TRACE_TYPE_PARTIAL_LINE; | |
590 | } | |
591 | ||
ae7462b4 | 592 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags) |
f633cef0 SR |
593 | { |
594 | struct ftrace_entry *field; | |
595 | ||
2c9b238e | 596 | trace_assign_type(field, iter->ent); |
f633cef0 | 597 | |
2c9b238e | 598 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
599 | field->ip, |
600 | field->parent_ip)) | |
f633cef0 SR |
601 | return TRACE_TYPE_PARTIAL_LINE; |
602 | ||
d9793bd8 | 603 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
604 | } |
605 | ||
ae7462b4 | 606 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags) |
f633cef0 SR |
607 | { |
608 | struct ftrace_entry *field; | |
2c9b238e | 609 | struct trace_seq *s = &iter->seq; |
f633cef0 | 610 | |
2c9b238e | 611 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
612 | |
613 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
614 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
615 | ||
d9793bd8 | 616 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
617 | } |
618 | ||
ae7462b4 | 619 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags) |
f633cef0 SR |
620 | { |
621 | struct ftrace_entry *field; | |
2c9b238e | 622 | struct trace_seq *s = &iter->seq; |
f633cef0 | 623 | |
2c9b238e | 624 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
625 | |
626 | SEQ_PUT_FIELD_RET(s, field->ip); | |
627 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
628 | ||
d9793bd8 | 629 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
630 | } |
631 | ||
632 | static struct trace_event trace_fn_event = { | |
ef18012b | 633 | .type = TRACE_FN, |
f633cef0 | 634 | .trace = trace_fn_trace, |
f633cef0 SR |
635 | .raw = trace_fn_raw, |
636 | .hex = trace_fn_hex, | |
637 | .binary = trace_fn_bin, | |
638 | }; | |
639 | ||
640 | /* TRACE_CTX an TRACE_WAKE */ | |
ae7462b4 ACM |
641 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
642 | char *delim) | |
f633cef0 SR |
643 | { |
644 | struct ctx_switch_entry *field; | |
4ca53085 | 645 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
646 | int S, T; |
647 | ||
4ca53085 | 648 | |
2c9b238e | 649 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
650 | |
651 | T = task_state_char(field->next_state); | |
652 | S = task_state_char(field->prev_state); | |
4ca53085 | 653 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
654 | if (!trace_seq_printf(&iter->seq, |
655 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
656 | field->prev_pid, |
657 | field->prev_prio, | |
658 | S, delim, | |
659 | field->next_cpu, | |
660 | field->next_pid, | |
661 | field->next_prio, | |
662 | T, comm)) | |
f633cef0 SR |
663 | return TRACE_TYPE_PARTIAL_LINE; |
664 | ||
d9793bd8 | 665 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
666 | } |
667 | ||
ae7462b4 | 668 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags) |
f633cef0 | 669 | { |
2c9b238e | 670 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
671 | } |
672 | ||
ae7462b4 ACM |
673 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
674 | int flags) | |
f633cef0 | 675 | { |
2c9b238e | 676 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
677 | } |
678 | ||
2c9b238e | 679 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
680 | { |
681 | struct ctx_switch_entry *field; | |
682 | int T; | |
683 | ||
2c9b238e | 684 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
685 | |
686 | if (!S) | |
687 | task_state_char(field->prev_state); | |
688 | T = task_state_char(field->next_state); | |
2c9b238e | 689 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
690 | field->prev_pid, |
691 | field->prev_prio, | |
692 | S, | |
693 | field->next_cpu, | |
694 | field->next_pid, | |
695 | field->next_prio, | |
696 | T)) | |
f633cef0 SR |
697 | return TRACE_TYPE_PARTIAL_LINE; |
698 | ||
d9793bd8 | 699 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
700 | } |
701 | ||
ae7462b4 | 702 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 703 | { |
2c9b238e | 704 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
705 | } |
706 | ||
ae7462b4 | 707 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 708 | { |
2c9b238e | 709 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
710 | } |
711 | ||
712 | ||
2c9b238e | 713 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
714 | { |
715 | struct ctx_switch_entry *field; | |
2c9b238e | 716 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
717 | int T; |
718 | ||
2c9b238e | 719 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
720 | |
721 | if (!S) | |
722 | task_state_char(field->prev_state); | |
723 | T = task_state_char(field->next_state); | |
724 | ||
725 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
726 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
727 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
728 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
729 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
730 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
731 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
732 | ||
d9793bd8 | 733 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
734 | } |
735 | ||
ae7462b4 | 736 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 737 | { |
2c9b238e | 738 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
739 | } |
740 | ||
ae7462b4 | 741 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 742 | { |
2c9b238e | 743 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
744 | } |
745 | ||
ae7462b4 ACM |
746 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
747 | int flags) | |
f633cef0 SR |
748 | { |
749 | struct ctx_switch_entry *field; | |
2c9b238e | 750 | struct trace_seq *s = &iter->seq; |
f633cef0 | 751 | |
2c9b238e | 752 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
753 | |
754 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
755 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
756 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
757 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
758 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
759 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
760 | ||
d9793bd8 | 761 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
762 | } |
763 | ||
764 | static struct trace_event trace_ctx_event = { | |
ef18012b | 765 | .type = TRACE_CTX, |
f633cef0 | 766 | .trace = trace_ctx_print, |
f633cef0 SR |
767 | .raw = trace_ctx_raw, |
768 | .hex = trace_ctx_hex, | |
769 | .binary = trace_ctxwake_bin, | |
770 | }; | |
771 | ||
772 | static struct trace_event trace_wake_event = { | |
ef18012b | 773 | .type = TRACE_WAKE, |
f633cef0 | 774 | .trace = trace_wake_print, |
f633cef0 SR |
775 | .raw = trace_wake_raw, |
776 | .hex = trace_wake_hex, | |
777 | .binary = trace_ctxwake_bin, | |
778 | }; | |
779 | ||
780 | /* TRACE_SPECIAL */ | |
ae7462b4 ACM |
781 | static enum print_line_t trace_special_print(struct trace_iterator *iter, |
782 | int flags) | |
f633cef0 SR |
783 | { |
784 | struct special_entry *field; | |
785 | ||
2c9b238e | 786 | trace_assign_type(field, iter->ent); |
f633cef0 | 787 | |
2c9b238e | 788 | if (!trace_seq_printf(&iter->seq, "# %ld %ld %ld\n", |
6c1a99af LJ |
789 | field->arg1, |
790 | field->arg2, | |
791 | field->arg3)) | |
f633cef0 SR |
792 | return TRACE_TYPE_PARTIAL_LINE; |
793 | ||
d9793bd8 | 794 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
795 | } |
796 | ||
ae7462b4 ACM |
797 | static enum print_line_t trace_special_hex(struct trace_iterator *iter, |
798 | int flags) | |
f633cef0 SR |
799 | { |
800 | struct special_entry *field; | |
2c9b238e | 801 | struct trace_seq *s = &iter->seq; |
f633cef0 | 802 | |
2c9b238e | 803 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
804 | |
805 | SEQ_PUT_HEX_FIELD_RET(s, field->arg1); | |
806 | SEQ_PUT_HEX_FIELD_RET(s, field->arg2); | |
807 | SEQ_PUT_HEX_FIELD_RET(s, field->arg3); | |
808 | ||
d9793bd8 | 809 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
810 | } |
811 | ||
ae7462b4 ACM |
812 | static enum print_line_t trace_special_bin(struct trace_iterator *iter, |
813 | int flags) | |
f633cef0 SR |
814 | { |
815 | struct special_entry *field; | |
2c9b238e | 816 | struct trace_seq *s = &iter->seq; |
f633cef0 | 817 | |
2c9b238e | 818 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
819 | |
820 | SEQ_PUT_FIELD_RET(s, field->arg1); | |
821 | SEQ_PUT_FIELD_RET(s, field->arg2); | |
822 | SEQ_PUT_FIELD_RET(s, field->arg3); | |
823 | ||
d9793bd8 | 824 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
825 | } |
826 | ||
827 | static struct trace_event trace_special_event = { | |
ef18012b | 828 | .type = TRACE_SPECIAL, |
f633cef0 | 829 | .trace = trace_special_print, |
f633cef0 SR |
830 | .raw = trace_special_print, |
831 | .hex = trace_special_hex, | |
832 | .binary = trace_special_bin, | |
833 | }; | |
834 | ||
835 | /* TRACE_STACK */ | |
836 | ||
ae7462b4 ACM |
837 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
838 | int flags) | |
f633cef0 SR |
839 | { |
840 | struct stack_entry *field; | |
2c9b238e | 841 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
842 | int i; |
843 | ||
2c9b238e | 844 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
845 | |
846 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
847 | if (i) { | |
6c1a99af | 848 | if (!trace_seq_puts(s, " <= ")) |
f633cef0 SR |
849 | goto partial; |
850 | ||
6c1a99af | 851 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
f633cef0 SR |
852 | goto partial; |
853 | } | |
6c1a99af | 854 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
855 | goto partial; |
856 | } | |
857 | ||
d9793bd8 | 858 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
859 | |
860 | partial: | |
861 | return TRACE_TYPE_PARTIAL_LINE; | |
862 | } | |
863 | ||
864 | static struct trace_event trace_stack_event = { | |
ef18012b | 865 | .type = TRACE_STACK, |
f633cef0 | 866 | .trace = trace_stack_print, |
f633cef0 SR |
867 | .raw = trace_special_print, |
868 | .hex = trace_special_hex, | |
869 | .binary = trace_special_bin, | |
870 | }; | |
871 | ||
872 | /* TRACE_USER_STACK */ | |
ae7462b4 ACM |
873 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
874 | int flags) | |
f633cef0 SR |
875 | { |
876 | struct userstack_entry *field; | |
2c9b238e | 877 | struct trace_seq *s = &iter->seq; |
f633cef0 | 878 | |
2c9b238e | 879 | trace_assign_type(field, iter->ent); |
f633cef0 | 880 | |
6c1a99af | 881 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
882 | goto partial; |
883 | ||
6c1a99af | 884 | if (!trace_seq_putc(s, '\n')) |
f633cef0 SR |
885 | goto partial; |
886 | ||
d9793bd8 | 887 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
888 | |
889 | partial: | |
890 | return TRACE_TYPE_PARTIAL_LINE; | |
891 | } | |
892 | ||
893 | static struct trace_event trace_user_stack_event = { | |
ef18012b | 894 | .type = TRACE_USER_STACK, |
f633cef0 | 895 | .trace = trace_user_stack_print, |
f633cef0 SR |
896 | .raw = trace_special_print, |
897 | .hex = trace_special_hex, | |
898 | .binary = trace_special_bin, | |
899 | }; | |
900 | ||
48ead020 | 901 | /* TRACE_BPRINT */ |
1427cdf0 | 902 | static enum print_line_t |
48ead020 | 903 | trace_bprint_print(struct trace_iterator *iter, int flags) |
1427cdf0 LJ |
904 | { |
905 | struct trace_entry *entry = iter->ent; | |
906 | struct trace_seq *s = &iter->seq; | |
48ead020 | 907 | struct bprint_entry *field; |
1427cdf0 LJ |
908 | |
909 | trace_assign_type(field, entry); | |
910 | ||
911 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
912 | goto partial; | |
913 | ||
914 | if (!trace_seq_puts(s, ": ")) | |
915 | goto partial; | |
916 | ||
917 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
918 | goto partial; | |
919 | ||
920 | return TRACE_TYPE_HANDLED; | |
921 | ||
922 | partial: | |
923 | return TRACE_TYPE_PARTIAL_LINE; | |
924 | } | |
925 | ||
769b0441 | 926 | |
48ead020 FW |
927 | static enum print_line_t |
928 | trace_bprint_raw(struct trace_iterator *iter, int flags) | |
1427cdf0 | 929 | { |
48ead020 | 930 | struct bprint_entry *field; |
1427cdf0 | 931 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 932 | |
769b0441 | 933 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
934 | |
935 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
936 | goto partial; | |
937 | ||
938 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
939 | goto partial; | |
940 | ||
941 | return TRACE_TYPE_HANDLED; | |
942 | ||
943 | partial: | |
944 | return TRACE_TYPE_PARTIAL_LINE; | |
945 | } | |
946 | ||
769b0441 | 947 | |
48ead020 FW |
948 | static struct trace_event trace_bprint_event = { |
949 | .type = TRACE_BPRINT, | |
950 | .trace = trace_bprint_print, | |
951 | .raw = trace_bprint_raw, | |
952 | }; | |
953 | ||
954 | /* TRACE_PRINT */ | |
955 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
956 | int flags) | |
957 | { | |
958 | struct print_entry *field; | |
959 | struct trace_seq *s = &iter->seq; | |
960 | ||
961 | trace_assign_type(field, iter->ent); | |
962 | ||
963 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
964 | goto partial; | |
965 | ||
966 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
967 | goto partial; | |
968 | ||
969 | return TRACE_TYPE_HANDLED; | |
970 | ||
971 | partial: | |
972 | return TRACE_TYPE_PARTIAL_LINE; | |
973 | } | |
974 | ||
975 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags) | |
976 | { | |
977 | struct print_entry *field; | |
978 | ||
979 | trace_assign_type(field, iter->ent); | |
980 | ||
981 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
982 | goto partial; | |
983 | ||
984 | return TRACE_TYPE_HANDLED; | |
985 | ||
986 | partial: | |
987 | return TRACE_TYPE_PARTIAL_LINE; | |
988 | } | |
989 | ||
769b0441 | 990 | static struct trace_event trace_print_event = { |
48ead020 | 991 | .type = TRACE_PRINT, |
769b0441 FW |
992 | .trace = trace_print_print, |
993 | .raw = trace_print_raw, | |
1427cdf0 LJ |
994 | }; |
995 | ||
48ead020 | 996 | |
f633cef0 SR |
997 | static struct trace_event *events[] __initdata = { |
998 | &trace_fn_event, | |
999 | &trace_ctx_event, | |
1000 | &trace_wake_event, | |
1001 | &trace_special_event, | |
1002 | &trace_stack_event, | |
1003 | &trace_user_stack_event, | |
48ead020 | 1004 | &trace_bprint_event, |
f633cef0 SR |
1005 | &trace_print_event, |
1006 | NULL | |
1007 | }; | |
1008 | ||
1009 | __init static int init_events(void) | |
1010 | { | |
1011 | struct trace_event *event; | |
1012 | int i, ret; | |
1013 | ||
1014 | for (i = 0; events[i]; i++) { | |
1015 | event = events[i]; | |
1016 | ||
1017 | ret = register_ftrace_event(event); | |
1018 | if (!ret) { | |
1019 | printk(KERN_WARNING "event %d failed to register\n", | |
1020 | event->type); | |
1021 | WARN_ON_ONCE(1); | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | device_initcall(init_events); |