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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 | ||
110bf2b7 | 17 | DECLARE_RWSEM(trace_event_mutex); |
be74b73a SR |
18 | |
19 | DEFINE_PER_CPU(struct trace_seq, ftrace_event_seq); | |
ec081ddc | 20 | EXPORT_PER_CPU_SYMBOL(ftrace_event_seq); |
be74b73a | 21 | |
f0868d1e SR |
22 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; |
23 | ||
24 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
25 | ||
0706f1c4 SR |
26 | void trace_print_seq(struct seq_file *m, struct trace_seq *s) |
27 | { | |
28 | int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len; | |
29 | ||
e1af3aec | 30 | seq_write(m, s->buffer, len); |
0706f1c4 SR |
31 | |
32 | trace_seq_init(s); | |
33 | } | |
34 | ||
5ef841f6 SR |
35 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
36 | { | |
37 | struct trace_seq *s = &iter->seq; | |
38 | struct trace_entry *entry = iter->ent; | |
39 | struct bprint_entry *field; | |
40 | int ret; | |
41 | ||
42 | trace_assign_type(field, entry); | |
43 | ||
44 | ret = trace_seq_bprintf(s, field->fmt, field->buf); | |
45 | if (!ret) | |
46 | return TRACE_TYPE_PARTIAL_LINE; | |
47 | ||
48 | return TRACE_TYPE_HANDLED; | |
49 | } | |
50 | ||
51 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
52 | { | |
53 | struct trace_seq *s = &iter->seq; | |
54 | struct trace_entry *entry = iter->ent; | |
55 | struct print_entry *field; | |
56 | int ret; | |
57 | ||
58 | trace_assign_type(field, entry); | |
59 | ||
60 | ret = trace_seq_printf(s, "%s", field->buf); | |
61 | if (!ret) | |
62 | return TRACE_TYPE_PARTIAL_LINE; | |
63 | ||
64 | return TRACE_TYPE_HANDLED; | |
65 | } | |
66 | ||
f0868d1e SR |
67 | /** |
68 | * trace_seq_printf - sequence printing of trace information | |
69 | * @s: trace sequence descriptor | |
70 | * @fmt: printf format string | |
71 | * | |
3e69533b JO |
72 | * It returns 0 if the trace oversizes the buffer's free |
73 | * space, 1 otherwise. | |
74 | * | |
f0868d1e SR |
75 | * The tracer may use either sequence operations or its own |
76 | * copy to user routines. To simplify formating of a trace | |
77 | * trace_seq_printf is used to store strings into a special | |
78 | * buffer (@s). Then the output may be either used by | |
79 | * the sequencer or pulled into another buffer. | |
80 | */ | |
81 | int | |
82 | trace_seq_printf(struct trace_seq *s, const char *fmt, ...) | |
83 | { | |
84 | int len = (PAGE_SIZE - 1) - s->len; | |
85 | va_list ap; | |
86 | int ret; | |
87 | ||
88 | if (!len) | |
89 | return 0; | |
90 | ||
91 | va_start(ap, fmt); | |
92 | ret = vsnprintf(s->buffer + s->len, len, fmt, ap); | |
93 | va_end(ap); | |
94 | ||
95 | /* If we can't write it all, don't bother writing anything */ | |
96 | if (ret >= len) | |
97 | return 0; | |
98 | ||
99 | s->len += ret; | |
100 | ||
3e69533b | 101 | return 1; |
f0868d1e | 102 | } |
17c873ec | 103 | EXPORT_SYMBOL_GPL(trace_seq_printf); |
f0868d1e | 104 | |
725c624a SR |
105 | /** |
106 | * trace_seq_vprintf - sequence printing of trace information | |
107 | * @s: trace sequence descriptor | |
108 | * @fmt: printf format string | |
109 | * | |
110 | * The tracer may use either sequence operations or its own | |
111 | * copy to user routines. To simplify formating of a trace | |
112 | * trace_seq_printf is used to store strings into a special | |
113 | * buffer (@s). Then the output may be either used by | |
114 | * the sequencer or pulled into another buffer. | |
115 | */ | |
116 | int | |
117 | trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) | |
118 | { | |
119 | int len = (PAGE_SIZE - 1) - s->len; | |
120 | int ret; | |
121 | ||
122 | if (!len) | |
123 | return 0; | |
124 | ||
125 | ret = vsnprintf(s->buffer + s->len, len, fmt, args); | |
126 | ||
127 | /* If we can't write it all, don't bother writing anything */ | |
128 | if (ret >= len) | |
129 | return 0; | |
130 | ||
131 | s->len += ret; | |
132 | ||
133 | return len; | |
134 | } | |
135 | EXPORT_SYMBOL_GPL(trace_seq_vprintf); | |
136 | ||
769b0441 | 137 | int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) |
1427cdf0 LJ |
138 | { |
139 | int len = (PAGE_SIZE - 1) - s->len; | |
140 | int ret; | |
141 | ||
142 | if (!len) | |
143 | return 0; | |
144 | ||
145 | ret = bstr_printf(s->buffer + s->len, len, fmt, binary); | |
146 | ||
147 | /* If we can't write it all, don't bother writing anything */ | |
148 | if (ret >= len) | |
149 | return 0; | |
150 | ||
151 | s->len += ret; | |
152 | ||
153 | return len; | |
154 | } | |
155 | ||
f0868d1e SR |
156 | /** |
157 | * trace_seq_puts - trace sequence printing of simple string | |
158 | * @s: trace sequence descriptor | |
159 | * @str: simple string to record | |
160 | * | |
161 | * The tracer may use either the sequence operations or its own | |
162 | * copy to user routines. This function records a simple string | |
163 | * into a special buffer (@s) for later retrieval by a sequencer | |
164 | * or other mechanism. | |
165 | */ | |
166 | int trace_seq_puts(struct trace_seq *s, const char *str) | |
167 | { | |
168 | int len = strlen(str); | |
169 | ||
170 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
171 | return 0; | |
172 | ||
173 | memcpy(s->buffer + s->len, str, len); | |
174 | s->len += len; | |
175 | ||
176 | return len; | |
177 | } | |
178 | ||
179 | int trace_seq_putc(struct trace_seq *s, unsigned char c) | |
180 | { | |
181 | if (s->len >= (PAGE_SIZE - 1)) | |
182 | return 0; | |
183 | ||
184 | s->buffer[s->len++] = c; | |
185 | ||
186 | return 1; | |
187 | } | |
188 | ||
b14b70a6 | 189 | int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
190 | { |
191 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
192 | return 0; | |
193 | ||
194 | memcpy(s->buffer + s->len, mem, len); | |
195 | s->len += len; | |
196 | ||
197 | return len; | |
198 | } | |
199 | ||
b14b70a6 | 200 | int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len) |
f0868d1e SR |
201 | { |
202 | unsigned char hex[HEX_CHARS]; | |
b14b70a6 | 203 | const unsigned char *data = mem; |
f0868d1e SR |
204 | int i, j; |
205 | ||
206 | #ifdef __BIG_ENDIAN | |
207 | for (i = 0, j = 0; i < len; i++) { | |
208 | #else | |
209 | for (i = len-1, j = 0; i >= 0; i--) { | |
210 | #endif | |
211 | hex[j++] = hex_asc_hi(data[i]); | |
212 | hex[j++] = hex_asc_lo(data[i]); | |
213 | } | |
214 | hex[j++] = ' '; | |
215 | ||
216 | return trace_seq_putmem(s, hex, j); | |
217 | } | |
218 | ||
bdd6df6a EGM |
219 | void *trace_seq_reserve(struct trace_seq *s, size_t len) |
220 | { | |
221 | void *ret; | |
222 | ||
223 | if (len > ((PAGE_SIZE - 1) - s->len)) | |
224 | return NULL; | |
225 | ||
226 | ret = s->buffer + s->len; | |
227 | s->len += len; | |
228 | ||
229 | return ret; | |
230 | } | |
231 | ||
f0868d1e SR |
232 | int trace_seq_path(struct trace_seq *s, struct path *path) |
233 | { | |
234 | unsigned char *p; | |
235 | ||
236 | if (s->len >= (PAGE_SIZE - 1)) | |
237 | return 0; | |
238 | p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len); | |
239 | if (!IS_ERR(p)) { | |
240 | p = mangle_path(s->buffer + s->len, p, "\n"); | |
241 | if (p) { | |
242 | s->len = p - s->buffer; | |
243 | return 1; | |
244 | } | |
245 | } else { | |
246 | s->buffer[s->len++] = '?'; | |
247 | return 1; | |
248 | } | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
be74b73a SR |
253 | const char * |
254 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
255 | unsigned long flags, | |
256 | const struct trace_print_flags *flag_array) | |
257 | { | |
258 | unsigned long mask; | |
259 | const char *str; | |
56d8bd3f | 260 | const char *ret = p->buffer + p->len; |
be74b73a SR |
261 | int i; |
262 | ||
be74b73a SR |
263 | for (i = 0; flag_array[i].name && flags; i++) { |
264 | ||
265 | mask = flag_array[i].mask; | |
266 | if ((flags & mask) != mask) | |
267 | continue; | |
268 | ||
269 | str = flag_array[i].name; | |
270 | flags &= ~mask; | |
271 | if (p->len && delim) | |
272 | trace_seq_puts(p, delim); | |
273 | trace_seq_puts(p, str); | |
274 | } | |
275 | ||
276 | /* check for left over flags */ | |
277 | if (flags) { | |
278 | if (p->len && delim) | |
279 | trace_seq_puts(p, delim); | |
280 | trace_seq_printf(p, "0x%lx", flags); | |
281 | } | |
282 | ||
283 | trace_seq_putc(p, 0); | |
284 | ||
56d8bd3f | 285 | return ret; |
be74b73a | 286 | } |
ec081ddc | 287 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 288 | |
0f4fc29d SR |
289 | const char * |
290 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
291 | const struct trace_print_flags *symbol_array) | |
292 | { | |
293 | int i; | |
56d8bd3f | 294 | const char *ret = p->buffer + p->len; |
0f4fc29d SR |
295 | |
296 | for (i = 0; symbol_array[i].name; i++) { | |
297 | ||
298 | if (val != symbol_array[i].mask) | |
299 | continue; | |
300 | ||
301 | trace_seq_puts(p, symbol_array[i].name); | |
302 | break; | |
303 | } | |
304 | ||
305 | if (!p->len) | |
306 | trace_seq_printf(p, "0x%lx", val); | |
307 | ||
308 | trace_seq_putc(p, 0); | |
309 | ||
56d8bd3f | 310 | return ret; |
0f4fc29d | 311 | } |
ec081ddc | 312 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 313 | |
f0868d1e SR |
314 | #ifdef CONFIG_KRETPROBES |
315 | static inline const char *kretprobed(const char *name) | |
316 | { | |
317 | static const char tramp_name[] = "kretprobe_trampoline"; | |
318 | int size = sizeof(tramp_name); | |
319 | ||
320 | if (strncmp(tramp_name, name, size) == 0) | |
321 | return "[unknown/kretprobe'd]"; | |
322 | return name; | |
323 | } | |
324 | #else | |
325 | static inline const char *kretprobed(const char *name) | |
326 | { | |
327 | return name; | |
328 | } | |
329 | #endif /* CONFIG_KRETPROBES */ | |
330 | ||
331 | static int | |
332 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) | |
333 | { | |
334 | #ifdef CONFIG_KALLSYMS | |
335 | char str[KSYM_SYMBOL_LEN]; | |
336 | const char *name; | |
337 | ||
338 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
339 | ||
340 | name = kretprobed(str); | |
341 | ||
342 | return trace_seq_printf(s, fmt, name); | |
343 | #endif | |
344 | return 1; | |
345 | } | |
346 | ||
347 | static int | |
348 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, | |
349 | unsigned long address) | |
350 | { | |
351 | #ifdef CONFIG_KALLSYMS | |
352 | char str[KSYM_SYMBOL_LEN]; | |
353 | const char *name; | |
354 | ||
355 | sprint_symbol(str, address); | |
356 | name = kretprobed(str); | |
357 | ||
358 | return trace_seq_printf(s, fmt, name); | |
359 | #endif | |
360 | return 1; | |
361 | } | |
362 | ||
363 | #ifndef CONFIG_64BIT | |
364 | # define IP_FMT "%08lx" | |
365 | #else | |
366 | # define IP_FMT "%016lx" | |
367 | #endif | |
368 | ||
369 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
370 | unsigned long ip, unsigned long sym_flags) | |
371 | { | |
372 | struct file *file = NULL; | |
373 | unsigned long vmstart = 0; | |
374 | int ret = 1; | |
375 | ||
376 | if (mm) { | |
377 | const struct vm_area_struct *vma; | |
378 | ||
379 | down_read(&mm->mmap_sem); | |
380 | vma = find_vma(mm, ip); | |
381 | if (vma) { | |
382 | file = vma->vm_file; | |
383 | vmstart = vma->vm_start; | |
384 | } | |
385 | if (file) { | |
386 | ret = trace_seq_path(s, &file->f_path); | |
387 | if (ret) | |
388 | ret = trace_seq_printf(s, "[+0x%lx]", | |
389 | ip - vmstart); | |
390 | } | |
391 | up_read(&mm->mmap_sem); | |
392 | } | |
393 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
394 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
395 | return ret; | |
396 | } | |
397 | ||
398 | int | |
399 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
400 | unsigned long sym_flags) | |
401 | { | |
402 | struct mm_struct *mm = NULL; | |
403 | int ret = 1; | |
404 | unsigned int i; | |
405 | ||
406 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
407 | struct task_struct *task; | |
408 | /* | |
409 | * we do the lookup on the thread group leader, | |
410 | * since individual threads might have already quit! | |
411 | */ | |
412 | rcu_read_lock(); | |
48659d31 | 413 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
414 | if (task) |
415 | mm = get_task_mm(task); | |
416 | rcu_read_unlock(); | |
417 | } | |
418 | ||
419 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
420 | unsigned long ip = entry->caller[i]; | |
421 | ||
422 | if (ip == ULONG_MAX || !ret) | |
423 | break; | |
048dc50c | 424 | if (ret) |
425 | ret = trace_seq_puts(s, " => "); | |
f0868d1e SR |
426 | if (!ip) { |
427 | if (ret) | |
428 | ret = trace_seq_puts(s, "??"); | |
048dc50c | 429 | if (ret) |
430 | ret = trace_seq_puts(s, "\n"); | |
f0868d1e SR |
431 | continue; |
432 | } | |
433 | if (!ret) | |
434 | break; | |
435 | if (ret) | |
436 | ret = seq_print_user_ip(s, mm, ip, sym_flags); | |
048dc50c | 437 | ret = trace_seq_puts(s, "\n"); |
f0868d1e SR |
438 | } |
439 | ||
440 | if (mm) | |
441 | mmput(mm); | |
442 | return ret; | |
443 | } | |
444 | ||
445 | int | |
446 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
447 | { | |
448 | int ret; | |
449 | ||
450 | if (!ip) | |
451 | return trace_seq_printf(s, "0"); | |
452 | ||
453 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
454 | ret = seq_print_sym_offset(s, "%s", ip); | |
455 | else | |
456 | ret = seq_print_sym_short(s, "%s", ip); | |
457 | ||
458 | if (!ret) | |
459 | return 0; | |
460 | ||
461 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
462 | ret = trace_seq_printf(s, " <" IP_FMT ">", ip); | |
463 | return ret; | |
464 | } | |
465 | ||
f81c972d SR |
466 | /** |
467 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
468 | * @s: trace seq struct to write to | |
469 | * @entry: The trace entry field from the ring buffer | |
470 | * | |
471 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
472 | * count and lock depth. | |
473 | */ | |
474 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be FW |
475 | { |
476 | int hardirq, softirq; | |
637e7e86 | 477 | int ret; |
c4a8e8be | 478 | |
c4a8e8be FW |
479 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
480 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 481 | |
f81c972d | 482 | if (!trace_seq_printf(s, "%c%c%c", |
d9793bd8 ACM |
483 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : |
484 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? | |
485 | 'X' : '.', | |
486 | (entry->flags & TRACE_FLAG_NEED_RESCHED) ? | |
487 | 'N' : '.', | |
488 | (hardirq && softirq) ? 'H' : | |
489 | hardirq ? 'h' : softirq ? 's' : '.')) | |
490 | return 0; | |
c4a8e8be | 491 | |
829b876d SR |
492 | if (entry->preempt_count) |
493 | ret = trace_seq_printf(s, "%x", entry->preempt_count); | |
637e7e86 | 494 | else |
829b876d SR |
495 | ret = trace_seq_putc(s, '.'); |
496 | ||
637e7e86 SR |
497 | if (!ret) |
498 | return 0; | |
499 | ||
829b876d SR |
500 | if (entry->lock_depth < 0) |
501 | return trace_seq_putc(s, '.'); | |
502 | ||
503 | return trace_seq_printf(s, "%d", entry->lock_depth); | |
c4a8e8be FW |
504 | } |
505 | ||
f81c972d SR |
506 | static int |
507 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
508 | { | |
509 | char comm[TASK_COMM_LEN]; | |
510 | ||
511 | trace_find_cmdline(entry->pid, comm); | |
512 | ||
513 | if (!trace_seq_printf(s, "%8.8s-%-5d %3d", | |
514 | comm, entry->pid, cpu)) | |
515 | return 0; | |
516 | ||
517 | return trace_print_lat_fmt(s, entry); | |
518 | } | |
519 | ||
c4a8e8be FW |
520 | static unsigned long preempt_mark_thresh = 100; |
521 | ||
d9793bd8 | 522 | static int |
c4a8e8be FW |
523 | lat_print_timestamp(struct trace_seq *s, u64 abs_usecs, |
524 | unsigned long rel_usecs) | |
525 | { | |
d9793bd8 ACM |
526 | return trace_seq_printf(s, " %4lldus%c: ", abs_usecs, |
527 | rel_usecs > preempt_mark_thresh ? '!' : | |
528 | rel_usecs > 1 ? '+' : ' '); | |
c4a8e8be FW |
529 | } |
530 | ||
531 | int trace_print_context(struct trace_iterator *iter) | |
532 | { | |
533 | struct trace_seq *s = &iter->seq; | |
534 | struct trace_entry *entry = iter->ent; | |
c4a8e8be FW |
535 | unsigned long long t = ns2usecs(iter->ts); |
536 | unsigned long usec_rem = do_div(t, USEC_PER_SEC); | |
537 | unsigned long secs = (unsigned long)t; | |
4ca53085 SR |
538 | char comm[TASK_COMM_LEN]; |
539 | ||
540 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 541 | |
d9793bd8 | 542 | return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ", |
1830b52d | 543 | comm, entry->pid, iter->cpu, secs, usec_rem); |
c4a8e8be FW |
544 | } |
545 | ||
546 | int trace_print_lat_context(struct trace_iterator *iter) | |
547 | { | |
548 | u64 next_ts; | |
d9793bd8 | 549 | int ret; |
c4a8e8be FW |
550 | struct trace_seq *s = &iter->seq; |
551 | struct trace_entry *entry = iter->ent, | |
552 | *next_entry = trace_find_next_entry(iter, NULL, | |
553 | &next_ts); | |
554 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
555 | unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); | |
556 | unsigned long rel_usecs; | |
557 | ||
558 | if (!next_entry) | |
559 | next_ts = iter->ts; | |
560 | rel_usecs = ns2usecs(next_ts - iter->ts); | |
561 | ||
562 | if (verbose) { | |
4ca53085 SR |
563 | char comm[TASK_COMM_LEN]; |
564 | ||
565 | trace_find_cmdline(entry->pid, comm); | |
566 | ||
cf8e3474 | 567 | ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" |
d9793bd8 | 568 | " %ld.%03ldms (+%ld.%03ldms): ", comm, |
1830b52d | 569 | entry->pid, iter->cpu, entry->flags, |
d9793bd8 ACM |
570 | entry->preempt_count, iter->idx, |
571 | ns2usecs(iter->ts), | |
572 | abs_usecs / USEC_PER_MSEC, | |
573 | abs_usecs % USEC_PER_MSEC, | |
574 | rel_usecs / USEC_PER_MSEC, | |
575 | rel_usecs % USEC_PER_MSEC); | |
c4a8e8be | 576 | } else { |
1830b52d | 577 | ret = lat_print_generic(s, entry, iter->cpu); |
d9793bd8 ACM |
578 | if (ret) |
579 | ret = lat_print_timestamp(s, abs_usecs, rel_usecs); | |
c4a8e8be FW |
580 | } |
581 | ||
d9793bd8 | 582 | return ret; |
c4a8e8be FW |
583 | } |
584 | ||
f633cef0 SR |
585 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
586 | ||
587 | static int task_state_char(unsigned long state) | |
588 | { | |
589 | int bit = state ? __ffs(state) + 1 : 0; | |
590 | ||
591 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
592 | } | |
593 | ||
f0868d1e SR |
594 | /** |
595 | * ftrace_find_event - find a registered event | |
596 | * @type: the type of event to look for | |
597 | * | |
598 | * Returns an event of type @type otherwise NULL | |
4f535968 | 599 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
600 | */ |
601 | struct trace_event *ftrace_find_event(int type) | |
602 | { | |
603 | struct trace_event *event; | |
604 | struct hlist_node *n; | |
605 | unsigned key; | |
606 | ||
607 | key = type & (EVENT_HASHSIZE - 1); | |
608 | ||
4f535968 | 609 | hlist_for_each_entry(event, n, &event_hash[key], node) { |
f0868d1e SR |
610 | if (event->type == type) |
611 | return event; | |
612 | } | |
613 | ||
614 | return NULL; | |
615 | } | |
616 | ||
060fa5c8 SR |
617 | static LIST_HEAD(ftrace_event_list); |
618 | ||
619 | static int trace_search_list(struct list_head **list) | |
620 | { | |
621 | struct trace_event *e; | |
622 | int last = __TRACE_LAST_TYPE; | |
623 | ||
624 | if (list_empty(&ftrace_event_list)) { | |
625 | *list = &ftrace_event_list; | |
626 | return last + 1; | |
627 | } | |
628 | ||
629 | /* | |
630 | * We used up all possible max events, | |
631 | * lets see if somebody freed one. | |
632 | */ | |
633 | list_for_each_entry(e, &ftrace_event_list, list) { | |
634 | if (e->type != last + 1) | |
635 | break; | |
636 | last++; | |
637 | } | |
638 | ||
639 | /* Did we used up all 65 thousand events??? */ | |
640 | if ((last + 1) > FTRACE_MAX_EVENT) | |
641 | return 0; | |
642 | ||
643 | *list = &e->list; | |
644 | return last + 1; | |
645 | } | |
646 | ||
4f535968 LJ |
647 | void trace_event_read_lock(void) |
648 | { | |
649 | down_read(&trace_event_mutex); | |
650 | } | |
651 | ||
652 | void trace_event_read_unlock(void) | |
653 | { | |
654 | up_read(&trace_event_mutex); | |
655 | } | |
656 | ||
f0868d1e SR |
657 | /** |
658 | * register_ftrace_event - register output for an event type | |
659 | * @event: the event type to register | |
660 | * | |
661 | * Event types are stored in a hash and this hash is used to | |
662 | * find a way to print an event. If the @event->type is set | |
663 | * then it will use that type, otherwise it will assign a | |
664 | * type to use. | |
665 | * | |
666 | * If you assign your own type, please make sure it is added | |
667 | * to the trace_type enum in trace.h, to avoid collisions | |
668 | * with the dynamic types. | |
669 | * | |
670 | * Returns the event type number or zero on error. | |
671 | */ | |
672 | int register_ftrace_event(struct trace_event *event) | |
673 | { | |
674 | unsigned key; | |
675 | int ret = 0; | |
676 | ||
4f535968 | 677 | down_write(&trace_event_mutex); |
f0868d1e | 678 | |
060fa5c8 | 679 | if (WARN_ON(!event)) |
28bea271 | 680 | goto out; |
28bea271 | 681 | |
060fa5c8 SR |
682 | INIT_LIST_HEAD(&event->list); |
683 | ||
684 | if (!event->type) { | |
48dd0fed | 685 | struct list_head *list = NULL; |
060fa5c8 SR |
686 | |
687 | if (next_event_type > FTRACE_MAX_EVENT) { | |
688 | ||
689 | event->type = trace_search_list(&list); | |
690 | if (!event->type) | |
691 | goto out; | |
692 | ||
693 | } else { | |
694 | ||
695 | event->type = next_event_type++; | |
696 | list = &ftrace_event_list; | |
697 | } | |
698 | ||
699 | if (WARN_ON(ftrace_find_event(event->type))) | |
700 | goto out; | |
701 | ||
702 | list_add_tail(&event->list, list); | |
703 | ||
704 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
705 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
706 | WARN_ON(1); | |
f0868d1e | 707 | goto out; |
060fa5c8 SR |
708 | } else { |
709 | /* Is this event already used */ | |
710 | if (ftrace_find_event(event->type)) | |
711 | goto out; | |
712 | } | |
f0868d1e | 713 | |
268ccda0 ACM |
714 | if (event->trace == NULL) |
715 | event->trace = trace_nop_print; | |
268ccda0 ACM |
716 | if (event->raw == NULL) |
717 | event->raw = trace_nop_print; | |
718 | if (event->hex == NULL) | |
719 | event->hex = trace_nop_print; | |
720 | if (event->binary == NULL) | |
721 | event->binary = trace_nop_print; | |
722 | ||
f0868d1e SR |
723 | key = event->type & (EVENT_HASHSIZE - 1); |
724 | ||
4f535968 | 725 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
726 | |
727 | ret = event->type; | |
728 | out: | |
4f535968 | 729 | up_write(&trace_event_mutex); |
f0868d1e SR |
730 | |
731 | return ret; | |
732 | } | |
17c873ec | 733 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 734 | |
110bf2b7 SR |
735 | /* |
736 | * Used by module code with the trace_event_mutex held for write. | |
737 | */ | |
738 | int __unregister_ftrace_event(struct trace_event *event) | |
739 | { | |
740 | hlist_del(&event->node); | |
741 | list_del(&event->list); | |
742 | return 0; | |
743 | } | |
744 | ||
f0868d1e SR |
745 | /** |
746 | * unregister_ftrace_event - remove a no longer used event | |
747 | * @event: the event to remove | |
748 | */ | |
749 | int unregister_ftrace_event(struct trace_event *event) | |
750 | { | |
4f535968 | 751 | down_write(&trace_event_mutex); |
110bf2b7 | 752 | __unregister_ftrace_event(event); |
4f535968 | 753 | up_write(&trace_event_mutex); |
f0868d1e SR |
754 | |
755 | return 0; | |
756 | } | |
17c873ec | 757 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
758 | |
759 | /* | |
760 | * Standard events | |
761 | */ | |
762 | ||
ae7462b4 | 763 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags) |
f633cef0 | 764 | { |
d9793bd8 | 765 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
766 | } |
767 | ||
768 | /* TRACE_FN */ | |
ae7462b4 | 769 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags) |
f633cef0 SR |
770 | { |
771 | struct ftrace_entry *field; | |
2c9b238e | 772 | struct trace_seq *s = &iter->seq; |
f633cef0 | 773 | |
2c9b238e | 774 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
775 | |
776 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
777 | goto partial; | |
778 | ||
779 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
780 | if (!trace_seq_printf(s, " <-")) | |
781 | goto partial; | |
782 | if (!seq_print_ip_sym(s, | |
783 | field->parent_ip, | |
784 | flags)) | |
785 | goto partial; | |
786 | } | |
787 | if (!trace_seq_printf(s, "\n")) | |
788 | goto partial; | |
789 | ||
d9793bd8 | 790 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
791 | |
792 | partial: | |
793 | return TRACE_TYPE_PARTIAL_LINE; | |
794 | } | |
795 | ||
ae7462b4 | 796 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags) |
f633cef0 SR |
797 | { |
798 | struct ftrace_entry *field; | |
799 | ||
2c9b238e | 800 | trace_assign_type(field, iter->ent); |
f633cef0 | 801 | |
2c9b238e | 802 | if (!trace_seq_printf(&iter->seq, "%lx %lx\n", |
6c1a99af LJ |
803 | field->ip, |
804 | field->parent_ip)) | |
f633cef0 SR |
805 | return TRACE_TYPE_PARTIAL_LINE; |
806 | ||
d9793bd8 | 807 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
808 | } |
809 | ||
ae7462b4 | 810 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags) |
f633cef0 SR |
811 | { |
812 | struct ftrace_entry *field; | |
2c9b238e | 813 | struct trace_seq *s = &iter->seq; |
f633cef0 | 814 | |
2c9b238e | 815 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
816 | |
817 | SEQ_PUT_HEX_FIELD_RET(s, field->ip); | |
818 | SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip); | |
819 | ||
d9793bd8 | 820 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
821 | } |
822 | ||
ae7462b4 | 823 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags) |
f633cef0 SR |
824 | { |
825 | struct ftrace_entry *field; | |
2c9b238e | 826 | struct trace_seq *s = &iter->seq; |
f633cef0 | 827 | |
2c9b238e | 828 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
829 | |
830 | SEQ_PUT_FIELD_RET(s, field->ip); | |
831 | SEQ_PUT_FIELD_RET(s, field->parent_ip); | |
832 | ||
d9793bd8 | 833 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
834 | } |
835 | ||
836 | static struct trace_event trace_fn_event = { | |
ef18012b | 837 | .type = TRACE_FN, |
f633cef0 | 838 | .trace = trace_fn_trace, |
f633cef0 SR |
839 | .raw = trace_fn_raw, |
840 | .hex = trace_fn_hex, | |
841 | .binary = trace_fn_bin, | |
842 | }; | |
843 | ||
844 | /* TRACE_CTX an TRACE_WAKE */ | |
ae7462b4 ACM |
845 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
846 | char *delim) | |
f633cef0 SR |
847 | { |
848 | struct ctx_switch_entry *field; | |
4ca53085 | 849 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
850 | int S, T; |
851 | ||
4ca53085 | 852 | |
2c9b238e | 853 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
854 | |
855 | T = task_state_char(field->next_state); | |
856 | S = task_state_char(field->prev_state); | |
4ca53085 | 857 | trace_find_cmdline(field->next_pid, comm); |
2c9b238e ACM |
858 | if (!trace_seq_printf(&iter->seq, |
859 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
6c1a99af LJ |
860 | field->prev_pid, |
861 | field->prev_prio, | |
862 | S, delim, | |
863 | field->next_cpu, | |
864 | field->next_pid, | |
865 | field->next_prio, | |
866 | T, comm)) | |
f633cef0 SR |
867 | return TRACE_TYPE_PARTIAL_LINE; |
868 | ||
d9793bd8 | 869 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
870 | } |
871 | ||
ae7462b4 | 872 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags) |
f633cef0 | 873 | { |
2c9b238e | 874 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
875 | } |
876 | ||
ae7462b4 ACM |
877 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
878 | int flags) | |
f633cef0 | 879 | { |
2c9b238e | 880 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
881 | } |
882 | ||
2c9b238e | 883 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
884 | { |
885 | struct ctx_switch_entry *field; | |
886 | int T; | |
887 | ||
2c9b238e | 888 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
889 | |
890 | if (!S) | |
b0f56f1a | 891 | S = task_state_char(field->prev_state); |
f633cef0 | 892 | T = task_state_char(field->next_state); |
2c9b238e | 893 | if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
6c1a99af LJ |
894 | field->prev_pid, |
895 | field->prev_prio, | |
896 | S, | |
897 | field->next_cpu, | |
898 | field->next_pid, | |
899 | field->next_prio, | |
900 | T)) | |
f633cef0 SR |
901 | return TRACE_TYPE_PARTIAL_LINE; |
902 | ||
d9793bd8 | 903 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
904 | } |
905 | ||
ae7462b4 | 906 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 907 | { |
2c9b238e | 908 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
909 | } |
910 | ||
ae7462b4 | 911 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags) |
f633cef0 | 912 | { |
2c9b238e | 913 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
914 | } |
915 | ||
916 | ||
2c9b238e | 917 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
918 | { |
919 | struct ctx_switch_entry *field; | |
2c9b238e | 920 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
921 | int T; |
922 | ||
2c9b238e | 923 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
924 | |
925 | if (!S) | |
b0f56f1a | 926 | S = task_state_char(field->prev_state); |
f633cef0 SR |
927 | T = task_state_char(field->next_state); |
928 | ||
929 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid); | |
930 | SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio); | |
931 | SEQ_PUT_HEX_FIELD_RET(s, S); | |
932 | SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu); | |
933 | SEQ_PUT_HEX_FIELD_RET(s, field->next_pid); | |
934 | SEQ_PUT_HEX_FIELD_RET(s, field->next_prio); | |
935 | SEQ_PUT_HEX_FIELD_RET(s, T); | |
936 | ||
d9793bd8 | 937 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
938 | } |
939 | ||
ae7462b4 | 940 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 941 | { |
2c9b238e | 942 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
943 | } |
944 | ||
ae7462b4 | 945 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags) |
f633cef0 | 946 | { |
2c9b238e | 947 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
948 | } |
949 | ||
ae7462b4 ACM |
950 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
951 | int flags) | |
f633cef0 SR |
952 | { |
953 | struct ctx_switch_entry *field; | |
2c9b238e | 954 | struct trace_seq *s = &iter->seq; |
f633cef0 | 955 | |
2c9b238e | 956 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
957 | |
958 | SEQ_PUT_FIELD_RET(s, field->prev_pid); | |
959 | SEQ_PUT_FIELD_RET(s, field->prev_prio); | |
960 | SEQ_PUT_FIELD_RET(s, field->prev_state); | |
961 | SEQ_PUT_FIELD_RET(s, field->next_pid); | |
962 | SEQ_PUT_FIELD_RET(s, field->next_prio); | |
963 | SEQ_PUT_FIELD_RET(s, field->next_state); | |
964 | ||
d9793bd8 | 965 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
966 | } |
967 | ||
968 | static struct trace_event trace_ctx_event = { | |
ef18012b | 969 | .type = TRACE_CTX, |
f633cef0 | 970 | .trace = trace_ctx_print, |
f633cef0 SR |
971 | .raw = trace_ctx_raw, |
972 | .hex = trace_ctx_hex, | |
973 | .binary = trace_ctxwake_bin, | |
974 | }; | |
975 | ||
976 | static struct trace_event trace_wake_event = { | |
ef18012b | 977 | .type = TRACE_WAKE, |
f633cef0 | 978 | .trace = trace_wake_print, |
f633cef0 SR |
979 | .raw = trace_wake_raw, |
980 | .hex = trace_wake_hex, | |
981 | .binary = trace_ctxwake_bin, | |
982 | }; | |
983 | ||
984 | /* TRACE_SPECIAL */ | |
ae7462b4 ACM |
985 | static enum print_line_t trace_special_print(struct trace_iterator *iter, |
986 | int flags) | |
f633cef0 SR |
987 | { |
988 | struct special_entry *field; | |
989 | ||
2c9b238e | 990 | trace_assign_type(field, iter->ent); |
f633cef0 | 991 | |
2c9b238e | 992 | if (!trace_seq_printf(&iter->seq, "# %ld %ld %ld\n", |
6c1a99af LJ |
993 | field->arg1, |
994 | field->arg2, | |
995 | field->arg3)) | |
f633cef0 SR |
996 | return TRACE_TYPE_PARTIAL_LINE; |
997 | ||
d9793bd8 | 998 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
999 | } |
1000 | ||
ae7462b4 ACM |
1001 | static enum print_line_t trace_special_hex(struct trace_iterator *iter, |
1002 | int flags) | |
f633cef0 SR |
1003 | { |
1004 | struct special_entry *field; | |
2c9b238e | 1005 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1006 | |
2c9b238e | 1007 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1008 | |
1009 | SEQ_PUT_HEX_FIELD_RET(s, field->arg1); | |
1010 | SEQ_PUT_HEX_FIELD_RET(s, field->arg2); | |
1011 | SEQ_PUT_HEX_FIELD_RET(s, field->arg3); | |
1012 | ||
d9793bd8 | 1013 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1014 | } |
1015 | ||
ae7462b4 ACM |
1016 | static enum print_line_t trace_special_bin(struct trace_iterator *iter, |
1017 | int flags) | |
f633cef0 SR |
1018 | { |
1019 | struct special_entry *field; | |
2c9b238e | 1020 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1021 | |
2c9b238e | 1022 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1023 | |
1024 | SEQ_PUT_FIELD_RET(s, field->arg1); | |
1025 | SEQ_PUT_FIELD_RET(s, field->arg2); | |
1026 | SEQ_PUT_FIELD_RET(s, field->arg3); | |
1027 | ||
d9793bd8 | 1028 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1029 | } |
1030 | ||
1031 | static struct trace_event trace_special_event = { | |
ef18012b | 1032 | .type = TRACE_SPECIAL, |
f633cef0 | 1033 | .trace = trace_special_print, |
f633cef0 SR |
1034 | .raw = trace_special_print, |
1035 | .hex = trace_special_hex, | |
1036 | .binary = trace_special_bin, | |
1037 | }; | |
1038 | ||
1039 | /* TRACE_STACK */ | |
1040 | ||
ae7462b4 ACM |
1041 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
1042 | int flags) | |
f633cef0 SR |
1043 | { |
1044 | struct stack_entry *field; | |
2c9b238e | 1045 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1046 | int i; |
1047 | ||
2c9b238e | 1048 | trace_assign_type(field, iter->ent); |
f633cef0 | 1049 | |
563af16c | 1050 | if (!trace_seq_puts(s, "<stack trace>\n")) |
f11b3f4e | 1051 | goto partial; |
f633cef0 | 1052 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { |
f11b3f4e | 1053 | if (!field->caller[i] || (field->caller[i] == ULONG_MAX)) |
1ec7c484 | 1054 | break; |
f11b3f4e | 1055 | if (!trace_seq_puts(s, " => ")) |
1056 | goto partial; | |
f633cef0 | 1057 | |
f11b3f4e | 1058 | if (!seq_print_ip_sym(s, field->caller[i], flags)) |
1059 | goto partial; | |
6c1a99af | 1060 | if (!trace_seq_puts(s, "\n")) |
f633cef0 SR |
1061 | goto partial; |
1062 | } | |
1063 | ||
d9793bd8 | 1064 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1065 | |
1066 | partial: | |
1067 | return TRACE_TYPE_PARTIAL_LINE; | |
1068 | } | |
1069 | ||
1070 | static struct trace_event trace_stack_event = { | |
ef18012b | 1071 | .type = TRACE_STACK, |
f633cef0 | 1072 | .trace = trace_stack_print, |
f633cef0 SR |
1073 | .raw = trace_special_print, |
1074 | .hex = trace_special_hex, | |
1075 | .binary = trace_special_bin, | |
1076 | }; | |
1077 | ||
1078 | /* TRACE_USER_STACK */ | |
ae7462b4 ACM |
1079 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
1080 | int flags) | |
f633cef0 SR |
1081 | { |
1082 | struct userstack_entry *field; | |
2c9b238e | 1083 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1084 | |
2c9b238e | 1085 | trace_assign_type(field, iter->ent); |
f633cef0 | 1086 | |
563af16c | 1087 | if (!trace_seq_puts(s, "<user stack trace>\n")) |
f633cef0 SR |
1088 | goto partial; |
1089 | ||
048dc50c | 1090 | if (!seq_print_userip_objs(field, s, flags)) |
f633cef0 SR |
1091 | goto partial; |
1092 | ||
d9793bd8 | 1093 | return TRACE_TYPE_HANDLED; |
f633cef0 SR |
1094 | |
1095 | partial: | |
1096 | return TRACE_TYPE_PARTIAL_LINE; | |
1097 | } | |
1098 | ||
1099 | static struct trace_event trace_user_stack_event = { | |
ef18012b | 1100 | .type = TRACE_USER_STACK, |
f633cef0 | 1101 | .trace = trace_user_stack_print, |
f633cef0 SR |
1102 | .raw = trace_special_print, |
1103 | .hex = trace_special_hex, | |
1104 | .binary = trace_special_bin, | |
1105 | }; | |
1106 | ||
48ead020 | 1107 | /* TRACE_BPRINT */ |
1427cdf0 | 1108 | static enum print_line_t |
48ead020 | 1109 | trace_bprint_print(struct trace_iterator *iter, int flags) |
1427cdf0 LJ |
1110 | { |
1111 | struct trace_entry *entry = iter->ent; | |
1112 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1113 | struct bprint_entry *field; |
1427cdf0 LJ |
1114 | |
1115 | trace_assign_type(field, entry); | |
1116 | ||
1117 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1118 | goto partial; | |
1119 | ||
1120 | if (!trace_seq_puts(s, ": ")) | |
1121 | goto partial; | |
1122 | ||
1123 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1124 | goto partial; | |
1125 | ||
1126 | return TRACE_TYPE_HANDLED; | |
1127 | ||
1128 | partial: | |
1129 | return TRACE_TYPE_PARTIAL_LINE; | |
1130 | } | |
1131 | ||
769b0441 | 1132 | |
48ead020 FW |
1133 | static enum print_line_t |
1134 | trace_bprint_raw(struct trace_iterator *iter, int flags) | |
1427cdf0 | 1135 | { |
48ead020 | 1136 | struct bprint_entry *field; |
1427cdf0 | 1137 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1138 | |
769b0441 | 1139 | trace_assign_type(field, iter->ent); |
1427cdf0 LJ |
1140 | |
1141 | if (!trace_seq_printf(s, ": %lx : ", field->ip)) | |
1142 | goto partial; | |
1143 | ||
1144 | if (!trace_seq_bprintf(s, field->fmt, field->buf)) | |
1145 | goto partial; | |
1146 | ||
1147 | return TRACE_TYPE_HANDLED; | |
1148 | ||
1149 | partial: | |
1150 | return TRACE_TYPE_PARTIAL_LINE; | |
1151 | } | |
1152 | ||
769b0441 | 1153 | |
48ead020 FW |
1154 | static struct trace_event trace_bprint_event = { |
1155 | .type = TRACE_BPRINT, | |
1156 | .trace = trace_bprint_print, | |
1157 | .raw = trace_bprint_raw, | |
1158 | }; | |
1159 | ||
1160 | /* TRACE_PRINT */ | |
1161 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
1162 | int flags) | |
1163 | { | |
1164 | struct print_entry *field; | |
1165 | struct trace_seq *s = &iter->seq; | |
1166 | ||
1167 | trace_assign_type(field, iter->ent); | |
1168 | ||
1169 | if (!seq_print_ip_sym(s, field->ip, flags)) | |
1170 | goto partial; | |
1171 | ||
1172 | if (!trace_seq_printf(s, ": %s", field->buf)) | |
1173 | goto partial; | |
1174 | ||
1175 | return TRACE_TYPE_HANDLED; | |
1176 | ||
1177 | partial: | |
1178 | return TRACE_TYPE_PARTIAL_LINE; | |
1179 | } | |
1180 | ||
1181 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags) | |
1182 | { | |
1183 | struct print_entry *field; | |
1184 | ||
1185 | trace_assign_type(field, iter->ent); | |
1186 | ||
1187 | if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf)) | |
1188 | goto partial; | |
1189 | ||
1190 | return TRACE_TYPE_HANDLED; | |
1191 | ||
1192 | partial: | |
1193 | return TRACE_TYPE_PARTIAL_LINE; | |
1194 | } | |
1195 | ||
769b0441 | 1196 | static struct trace_event trace_print_event = { |
48ead020 | 1197 | .type = TRACE_PRINT, |
769b0441 FW |
1198 | .trace = trace_print_print, |
1199 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1200 | }; |
1201 | ||
48ead020 | 1202 | |
f633cef0 SR |
1203 | static struct trace_event *events[] __initdata = { |
1204 | &trace_fn_event, | |
1205 | &trace_ctx_event, | |
1206 | &trace_wake_event, | |
1207 | &trace_special_event, | |
1208 | &trace_stack_event, | |
1209 | &trace_user_stack_event, | |
48ead020 | 1210 | &trace_bprint_event, |
f633cef0 SR |
1211 | &trace_print_event, |
1212 | NULL | |
1213 | }; | |
1214 | ||
1215 | __init static int init_events(void) | |
1216 | { | |
1217 | struct trace_event *event; | |
1218 | int i, ret; | |
1219 | ||
1220 | for (i = 0; events[i]; i++) { | |
1221 | event = events[i]; | |
1222 | ||
1223 | ret = register_ftrace_event(event); | |
1224 | if (!ret) { | |
1225 | printk(KERN_WARNING "event %d failed to register\n", | |
1226 | event->type); | |
1227 | WARN_ON_ONCE(1); | |
1228 | } | |
1229 | } | |
1230 | ||
1231 | return 0; | |
1232 | } | |
1233 | device_initcall(init_events); |