Commit | Line | Data |
---|---|---|
f0868d1e SR |
1 | /* |
2 | * trace_output.c | |
3 | * | |
4 | * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/mutex.h> | |
10 | #include <linux/ftrace.h> | |
11 | ||
12 | #include "trace_output.h" | |
13 | ||
14 | /* must be a power of 2 */ | |
15 | #define EVENT_HASHSIZE 128 | |
16 | ||
52f6ad6d | 17 | DECLARE_RWSEM(trace_event_sem); |
be74b73a | 18 | |
f0868d1e SR |
19 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; |
20 | ||
21 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
22 | ||
09ae7234 SRRH |
23 | enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter) |
24 | { | |
25 | struct trace_seq *s = &iter->seq; | |
26 | struct trace_entry *entry = iter->ent; | |
27 | struct bputs_entry *field; | |
09ae7234 SRRH |
28 | |
29 | trace_assign_type(field, entry); | |
30 | ||
19a7fe20 | 31 | trace_seq_puts(s, field->str); |
09ae7234 | 32 | |
19a7fe20 | 33 | return trace_handle_return(s); |
09ae7234 SRRH |
34 | } |
35 | ||
5ef841f6 SR |
36 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
37 | { | |
38 | struct trace_seq *s = &iter->seq; | |
39 | struct trace_entry *entry = iter->ent; | |
40 | struct bprint_entry *field; | |
5ef841f6 SR |
41 | |
42 | trace_assign_type(field, entry); | |
43 | ||
19a7fe20 | 44 | trace_seq_bprintf(s, field->fmt, field->buf); |
5ef841f6 | 45 | |
19a7fe20 | 46 | return trace_handle_return(s); |
5ef841f6 SR |
47 | } |
48 | ||
49 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
50 | { | |
51 | struct trace_seq *s = &iter->seq; | |
52 | struct trace_entry *entry = iter->ent; | |
53 | struct print_entry *field; | |
5ef841f6 SR |
54 | |
55 | trace_assign_type(field, entry); | |
56 | ||
19a7fe20 | 57 | trace_seq_puts(s, field->buf); |
5ef841f6 | 58 | |
19a7fe20 | 59 | return trace_handle_return(s); |
5ef841f6 SR |
60 | } |
61 | ||
be74b73a SR |
62 | const char * |
63 | ftrace_print_flags_seq(struct trace_seq *p, const char *delim, | |
64 | unsigned long flags, | |
65 | const struct trace_print_flags *flag_array) | |
66 | { | |
67 | unsigned long mask; | |
68 | const char *str; | |
7b039cb4 | 69 | const char *ret = trace_seq_buffer_ptr(p); |
e404b321 | 70 | int i, first = 1; |
be74b73a | 71 | |
be74b73a SR |
72 | for (i = 0; flag_array[i].name && flags; i++) { |
73 | ||
74 | mask = flag_array[i].mask; | |
75 | if ((flags & mask) != mask) | |
76 | continue; | |
77 | ||
78 | str = flag_array[i].name; | |
79 | flags &= ~mask; | |
e404b321 | 80 | if (!first && delim) |
be74b73a | 81 | trace_seq_puts(p, delim); |
e404b321 AV |
82 | else |
83 | first = 0; | |
be74b73a SR |
84 | trace_seq_puts(p, str); |
85 | } | |
86 | ||
87 | /* check for left over flags */ | |
88 | if (flags) { | |
5b349261 | 89 | if (!first && delim) |
be74b73a SR |
90 | trace_seq_puts(p, delim); |
91 | trace_seq_printf(p, "0x%lx", flags); | |
92 | } | |
93 | ||
94 | trace_seq_putc(p, 0); | |
95 | ||
56d8bd3f | 96 | return ret; |
be74b73a | 97 | } |
ec081ddc | 98 | EXPORT_SYMBOL(ftrace_print_flags_seq); |
be74b73a | 99 | |
0f4fc29d SR |
100 | const char * |
101 | ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val, | |
102 | const struct trace_print_flags *symbol_array) | |
103 | { | |
104 | int i; | |
7b039cb4 | 105 | const char *ret = trace_seq_buffer_ptr(p); |
0f4fc29d SR |
106 | |
107 | for (i = 0; symbol_array[i].name; i++) { | |
108 | ||
109 | if (val != symbol_array[i].mask) | |
110 | continue; | |
111 | ||
112 | trace_seq_puts(p, symbol_array[i].name); | |
113 | break; | |
114 | } | |
115 | ||
7b039cb4 | 116 | if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
0f4fc29d | 117 | trace_seq_printf(p, "0x%lx", val); |
8e1e1df2 | 118 | |
0f4fc29d SR |
119 | trace_seq_putc(p, 0); |
120 | ||
56d8bd3f | 121 | return ret; |
0f4fc29d | 122 | } |
ec081ddc | 123 | EXPORT_SYMBOL(ftrace_print_symbols_seq); |
0f4fc29d | 124 | |
2fc1b6f0 | 125 | #if BITS_PER_LONG == 32 |
126 | const char * | |
127 | ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, | |
128 | const struct trace_print_flags_u64 *symbol_array) | |
129 | { | |
130 | int i; | |
7b039cb4 | 131 | const char *ret = trace_seq_buffer_ptr(p); |
2fc1b6f0 | 132 | |
133 | for (i = 0; symbol_array[i].name; i++) { | |
134 | ||
135 | if (val != symbol_array[i].mask) | |
136 | continue; | |
137 | ||
138 | trace_seq_puts(p, symbol_array[i].name); | |
139 | break; | |
140 | } | |
141 | ||
7b039cb4 | 142 | if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
2fc1b6f0 | 143 | trace_seq_printf(p, "0x%llx", val); |
144 | ||
145 | trace_seq_putc(p, 0); | |
146 | ||
147 | return ret; | |
148 | } | |
149 | EXPORT_SYMBOL(ftrace_print_symbols_seq_u64); | |
150 | #endif | |
151 | ||
4449bf92 SRRH |
152 | const char * |
153 | ftrace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, | |
154 | unsigned int bitmask_size) | |
155 | { | |
7b039cb4 | 156 | const char *ret = trace_seq_buffer_ptr(p); |
4449bf92 SRRH |
157 | |
158 | trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8); | |
159 | trace_seq_putc(p, 0); | |
160 | ||
161 | return ret; | |
162 | } | |
163 | EXPORT_SYMBOL_GPL(ftrace_print_bitmask_seq); | |
164 | ||
5a2e3995 KT |
165 | const char * |
166 | ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) | |
167 | { | |
168 | int i; | |
7b039cb4 | 169 | const char *ret = trace_seq_buffer_ptr(p); |
5a2e3995 KT |
170 | |
171 | for (i = 0; i < buf_len; i++) | |
172 | trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]); | |
173 | ||
174 | trace_seq_putc(p, 0); | |
175 | ||
176 | return ret; | |
177 | } | |
178 | EXPORT_SYMBOL(ftrace_print_hex_seq); | |
179 | ||
6ea22486 DM |
180 | const char * |
181 | ftrace_print_array_seq(struct trace_seq *p, const void *buf, int buf_len, | |
182 | size_t el_size) | |
183 | { | |
184 | const char *ret = trace_seq_buffer_ptr(p); | |
185 | const char *prefix = ""; | |
186 | void *ptr = (void *)buf; | |
187 | ||
188 | trace_seq_putc(p, '{'); | |
189 | ||
190 | while (ptr < buf + buf_len) { | |
191 | switch (el_size) { | |
192 | case 1: | |
193 | trace_seq_printf(p, "%s0x%x", prefix, | |
194 | *(u8 *)ptr); | |
195 | break; | |
196 | case 2: | |
197 | trace_seq_printf(p, "%s0x%x", prefix, | |
198 | *(u16 *)ptr); | |
199 | break; | |
200 | case 4: | |
201 | trace_seq_printf(p, "%s0x%x", prefix, | |
202 | *(u32 *)ptr); | |
203 | break; | |
204 | case 8: | |
205 | trace_seq_printf(p, "%s0x%llx", prefix, | |
206 | *(u64 *)ptr); | |
207 | break; | |
208 | default: | |
209 | trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size, | |
210 | *(u8 *)ptr); | |
211 | el_size = 1; | |
212 | } | |
213 | prefix = ","; | |
214 | ptr += el_size; | |
215 | } | |
216 | ||
217 | trace_seq_putc(p, '}'); | |
218 | trace_seq_putc(p, 0); | |
219 | ||
220 | return ret; | |
221 | } | |
222 | EXPORT_SYMBOL(ftrace_print_array_seq); | |
223 | ||
f71130de LZ |
224 | int ftrace_raw_output_prep(struct trace_iterator *iter, |
225 | struct trace_event *trace_event) | |
226 | { | |
227 | struct ftrace_event_call *event; | |
228 | struct trace_seq *s = &iter->seq; | |
229 | struct trace_seq *p = &iter->tmp_seq; | |
230 | struct trace_entry *entry; | |
f71130de LZ |
231 | |
232 | event = container_of(trace_event, struct ftrace_event_call, event); | |
233 | entry = iter->ent; | |
234 | ||
235 | if (entry->type != event->event.type) { | |
236 | WARN_ON_ONCE(1); | |
237 | return TRACE_TYPE_UNHANDLED; | |
238 | } | |
239 | ||
240 | trace_seq_init(p); | |
19a7fe20 SRRH |
241 | trace_seq_printf(s, "%s: ", ftrace_event_name(event)); |
242 | ||
8e2e095c | 243 | return trace_handle_return(s); |
f71130de LZ |
244 | } |
245 | EXPORT_SYMBOL(ftrace_raw_output_prep); | |
246 | ||
1d6bae96 SR |
247 | static int ftrace_output_raw(struct trace_iterator *iter, char *name, |
248 | char *fmt, va_list ap) | |
249 | { | |
250 | struct trace_seq *s = &iter->seq; | |
1d6bae96 | 251 | |
19a7fe20 SRRH |
252 | trace_seq_printf(s, "%s: ", name); |
253 | trace_seq_vprintf(s, fmt, ap); | |
1d6bae96 | 254 | |
19a7fe20 | 255 | return trace_handle_return(s); |
1d6bae96 SR |
256 | } |
257 | ||
258 | int ftrace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...) | |
259 | { | |
260 | va_list ap; | |
261 | int ret; | |
262 | ||
263 | va_start(ap, fmt); | |
264 | ret = ftrace_output_raw(iter, name, fmt, ap); | |
265 | va_end(ap); | |
266 | ||
267 | return ret; | |
268 | } | |
269 | EXPORT_SYMBOL_GPL(ftrace_output_call); | |
270 | ||
f0868d1e SR |
271 | #ifdef CONFIG_KRETPROBES |
272 | static inline const char *kretprobed(const char *name) | |
273 | { | |
274 | static const char tramp_name[] = "kretprobe_trampoline"; | |
275 | int size = sizeof(tramp_name); | |
276 | ||
277 | if (strncmp(tramp_name, name, size) == 0) | |
278 | return "[unknown/kretprobe'd]"; | |
279 | return name; | |
280 | } | |
281 | #else | |
282 | static inline const char *kretprobed(const char *name) | |
283 | { | |
284 | return name; | |
285 | } | |
286 | #endif /* CONFIG_KRETPROBES */ | |
287 | ||
19a7fe20 | 288 | static void |
f0868d1e SR |
289 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) |
290 | { | |
291 | #ifdef CONFIG_KALLSYMS | |
292 | char str[KSYM_SYMBOL_LEN]; | |
293 | const char *name; | |
294 | ||
295 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
296 | ||
297 | name = kretprobed(str); | |
298 | ||
19a7fe20 | 299 | trace_seq_printf(s, fmt, name); |
f0868d1e | 300 | #endif |
f0868d1e SR |
301 | } |
302 | ||
19a7fe20 | 303 | static void |
f0868d1e SR |
304 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, |
305 | unsigned long address) | |
306 | { | |
307 | #ifdef CONFIG_KALLSYMS | |
308 | char str[KSYM_SYMBOL_LEN]; | |
309 | const char *name; | |
310 | ||
311 | sprint_symbol(str, address); | |
312 | name = kretprobed(str); | |
313 | ||
19a7fe20 | 314 | trace_seq_printf(s, fmt, name); |
f0868d1e | 315 | #endif |
f0868d1e SR |
316 | } |
317 | ||
318 | #ifndef CONFIG_64BIT | |
319 | # define IP_FMT "%08lx" | |
320 | #else | |
321 | # define IP_FMT "%016lx" | |
322 | #endif | |
323 | ||
324 | int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, | |
325 | unsigned long ip, unsigned long sym_flags) | |
326 | { | |
327 | struct file *file = NULL; | |
328 | unsigned long vmstart = 0; | |
329 | int ret = 1; | |
330 | ||
d184b31c JB |
331 | if (s->full) |
332 | return 0; | |
333 | ||
f0868d1e SR |
334 | if (mm) { |
335 | const struct vm_area_struct *vma; | |
336 | ||
337 | down_read(&mm->mmap_sem); | |
338 | vma = find_vma(mm, ip); | |
339 | if (vma) { | |
340 | file = vma->vm_file; | |
341 | vmstart = vma->vm_start; | |
342 | } | |
343 | if (file) { | |
344 | ret = trace_seq_path(s, &file->f_path); | |
345 | if (ret) | |
19a7fe20 SRRH |
346 | trace_seq_printf(s, "[+0x%lx]", |
347 | ip - vmstart); | |
f0868d1e SR |
348 | } |
349 | up_read(&mm->mmap_sem); | |
350 | } | |
351 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
19a7fe20 SRRH |
352 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
353 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
354 | } |
355 | ||
356 | int | |
357 | seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, | |
358 | unsigned long sym_flags) | |
359 | { | |
360 | struct mm_struct *mm = NULL; | |
f0868d1e SR |
361 | unsigned int i; |
362 | ||
363 | if (trace_flags & TRACE_ITER_SYM_USEROBJ) { | |
364 | struct task_struct *task; | |
365 | /* | |
366 | * we do the lookup on the thread group leader, | |
367 | * since individual threads might have already quit! | |
368 | */ | |
369 | rcu_read_lock(); | |
48659d31 | 370 | task = find_task_by_vpid(entry->tgid); |
f0868d1e SR |
371 | if (task) |
372 | mm = get_task_mm(task); | |
373 | rcu_read_unlock(); | |
374 | } | |
375 | ||
376 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
377 | unsigned long ip = entry->caller[i]; | |
378 | ||
19a7fe20 | 379 | if (ip == ULONG_MAX || trace_seq_has_overflowed(s)) |
f0868d1e | 380 | break; |
19a7fe20 SRRH |
381 | |
382 | trace_seq_puts(s, " => "); | |
383 | ||
f0868d1e | 384 | if (!ip) { |
19a7fe20 SRRH |
385 | trace_seq_puts(s, "??"); |
386 | trace_seq_putc(s, '\n'); | |
f0868d1e SR |
387 | continue; |
388 | } | |
19a7fe20 SRRH |
389 | |
390 | seq_print_user_ip(s, mm, ip, sym_flags); | |
391 | trace_seq_putc(s, '\n'); | |
f0868d1e SR |
392 | } |
393 | ||
394 | if (mm) | |
395 | mmput(mm); | |
19a7fe20 SRRH |
396 | |
397 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
398 | } |
399 | ||
400 | int | |
401 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
402 | { | |
19a7fe20 SRRH |
403 | if (!ip) { |
404 | trace_seq_putc(s, '0'); | |
405 | goto out; | |
406 | } | |
f0868d1e SR |
407 | |
408 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
19a7fe20 | 409 | seq_print_sym_offset(s, "%s", ip); |
f0868d1e | 410 | else |
19a7fe20 | 411 | seq_print_sym_short(s, "%s", ip); |
f0868d1e SR |
412 | |
413 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
19a7fe20 SRRH |
414 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
415 | ||
416 | out: | |
417 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
418 | } |
419 | ||
f81c972d SR |
420 | /** |
421 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
422 | * @s: trace seq struct to write to | |
423 | * @entry: The trace entry field from the ring buffer | |
424 | * | |
425 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 426 | * count. |
f81c972d SR |
427 | */ |
428 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 429 | { |
10da37a6 DS |
430 | char hardsoft_irq; |
431 | char need_resched; | |
432 | char irqs_off; | |
433 | int hardirq; | |
434 | int softirq; | |
c4a8e8be | 435 | |
c4a8e8be FW |
436 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
437 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 438 | |
10da37a6 DS |
439 | irqs_off = |
440 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
441 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
442 | '.'; | |
e5137b50 PZ |
443 | |
444 | switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | | |
445 | TRACE_FLAG_PREEMPT_RESCHED)) { | |
446 | case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: | |
447 | need_resched = 'N'; | |
448 | break; | |
449 | case TRACE_FLAG_NEED_RESCHED: | |
450 | need_resched = 'n'; | |
451 | break; | |
452 | case TRACE_FLAG_PREEMPT_RESCHED: | |
453 | need_resched = 'p'; | |
454 | break; | |
455 | default: | |
456 | need_resched = '.'; | |
457 | break; | |
458 | } | |
459 | ||
10da37a6 DS |
460 | hardsoft_irq = |
461 | (hardirq && softirq) ? 'H' : | |
462 | hardirq ? 'h' : | |
463 | softirq ? 's' : | |
464 | '.'; | |
465 | ||
19a7fe20 SRRH |
466 | trace_seq_printf(s, "%c%c%c", |
467 | irqs_off, need_resched, hardsoft_irq); | |
c4a8e8be | 468 | |
829b876d | 469 | if (entry->preempt_count) |
19a7fe20 | 470 | trace_seq_printf(s, "%x", entry->preempt_count); |
637e7e86 | 471 | else |
19a7fe20 | 472 | trace_seq_putc(s, '.'); |
829b876d | 473 | |
19a7fe20 | 474 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
475 | } |
476 | ||
f81c972d SR |
477 | static int |
478 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
479 | { | |
480 | char comm[TASK_COMM_LEN]; | |
481 | ||
482 | trace_find_cmdline(entry->pid, comm); | |
483 | ||
19a7fe20 SRRH |
484 | trace_seq_printf(s, "%8.8s-%-5d %3d", |
485 | comm, entry->pid, cpu); | |
f81c972d SR |
486 | |
487 | return trace_print_lat_fmt(s, entry); | |
488 | } | |
489 | ||
8e1e1df2 BP |
490 | #undef MARK |
491 | #define MARK(v, s) {.val = v, .sym = s} | |
492 | /* trace overhead mark */ | |
493 | static const struct trace_mark { | |
494 | unsigned long long val; /* unit: nsec */ | |
495 | char sym; | |
496 | } mark[] = { | |
497 | MARK(1000000000ULL , '$'), /* 1 sec */ | |
498 | MARK(1000000ULL , '#'), /* 1000 usecs */ | |
499 | MARK(100000ULL , '!'), /* 100 usecs */ | |
500 | MARK(10000ULL , '+'), /* 10 usecs */ | |
501 | }; | |
502 | #undef MARK | |
503 | ||
504 | char trace_find_mark(unsigned long long d) | |
505 | { | |
506 | int i; | |
507 | int size = ARRAY_SIZE(mark); | |
508 | ||
509 | for (i = 0; i < size; i++) { | |
510 | if (d >= mark[i].val) | |
511 | break; | |
512 | } | |
513 | ||
514 | return (i == size) ? ' ' : mark[i].sym; | |
515 | } | |
c4a8e8be | 516 | |
d9793bd8 | 517 | static int |
8be0709f | 518 | lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
c4a8e8be | 519 | { |
8be0709f DS |
520 | unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE; |
521 | unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; | |
12883efb | 522 | unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start; |
8be0709f DS |
523 | unsigned long long rel_ts = next_ts - iter->ts; |
524 | struct trace_seq *s = &iter->seq; | |
525 | ||
526 | if (in_ns) { | |
527 | abs_ts = ns2usecs(abs_ts); | |
528 | rel_ts = ns2usecs(rel_ts); | |
529 | } | |
530 | ||
531 | if (verbose && in_ns) { | |
532 | unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); | |
533 | unsigned long abs_msec = (unsigned long)abs_ts; | |
534 | unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); | |
535 | unsigned long rel_msec = (unsigned long)rel_ts; | |
536 | ||
19a7fe20 SRRH |
537 | trace_seq_printf( |
538 | s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", | |
539 | ns2usecs(iter->ts), | |
540 | abs_msec, abs_usec, | |
541 | rel_msec, rel_usec); | |
542 | ||
8be0709f | 543 | } else if (verbose && !in_ns) { |
19a7fe20 SRRH |
544 | trace_seq_printf( |
545 | s, "[%016llx] %lld (+%lld): ", | |
546 | iter->ts, abs_ts, rel_ts); | |
547 | ||
8be0709f | 548 | } else if (!verbose && in_ns) { |
19a7fe20 SRRH |
549 | trace_seq_printf( |
550 | s, " %4lldus%c: ", | |
551 | abs_ts, | |
8e1e1df2 | 552 | trace_find_mark(rel_ts * NSEC_PER_USEC)); |
19a7fe20 | 553 | |
8be0709f | 554 | } else { /* !verbose && !in_ns */ |
19a7fe20 | 555 | trace_seq_printf(s, " %4lld: ", abs_ts); |
8be0709f | 556 | } |
19a7fe20 SRRH |
557 | |
558 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
559 | } |
560 | ||
561 | int trace_print_context(struct trace_iterator *iter) | |
562 | { | |
563 | struct trace_seq *s = &iter->seq; | |
564 | struct trace_entry *entry = iter->ent; | |
8be0709f DS |
565 | unsigned long long t; |
566 | unsigned long secs, usec_rem; | |
4ca53085 SR |
567 | char comm[TASK_COMM_LEN]; |
568 | ||
569 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 570 | |
19a7fe20 | 571 | trace_seq_printf(s, "%16s-%-5d [%03d] ", |
77271ce4 | 572 | comm, entry->pid, iter->cpu); |
77271ce4 | 573 | |
19a7fe20 SRRH |
574 | if (trace_flags & TRACE_ITER_IRQ_INFO) |
575 | trace_print_lat_fmt(s, entry); | |
77271ce4 | 576 | |
8be0709f DS |
577 | if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { |
578 | t = ns2usecs(iter->ts); | |
579 | usec_rem = do_div(t, USEC_PER_SEC); | |
580 | secs = (unsigned long)t; | |
19a7fe20 | 581 | trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); |
8be0709f | 582 | } else |
19a7fe20 SRRH |
583 | trace_seq_printf(s, " %12llu: ", iter->ts); |
584 | ||
585 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
586 | } |
587 | ||
588 | int trace_print_lat_context(struct trace_iterator *iter) | |
589 | { | |
590 | u64 next_ts; | |
db4c75cb SR |
591 | /* trace_find_next_entry will reset ent_size */ |
592 | int ent_size = iter->ent_size; | |
c4a8e8be FW |
593 | struct trace_seq *s = &iter->seq; |
594 | struct trace_entry *entry = iter->ent, | |
595 | *next_entry = trace_find_next_entry(iter, NULL, | |
596 | &next_ts); | |
597 | unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); | |
c4a8e8be | 598 | |
db4c75cb SR |
599 | /* Restore the original ent_size */ |
600 | iter->ent_size = ent_size; | |
601 | ||
c4a8e8be FW |
602 | if (!next_entry) |
603 | next_ts = iter->ts; | |
c4a8e8be FW |
604 | |
605 | if (verbose) { | |
4ca53085 SR |
606 | char comm[TASK_COMM_LEN]; |
607 | ||
608 | trace_find_cmdline(entry->pid, comm); | |
609 | ||
19a7fe20 SRRH |
610 | trace_seq_printf( |
611 | s, "%16s %5d %3d %d %08x %08lx ", | |
612 | comm, entry->pid, iter->cpu, entry->flags, | |
613 | entry->preempt_count, iter->idx); | |
c4a8e8be | 614 | } else { |
19a7fe20 | 615 | lat_print_generic(s, entry, iter->cpu); |
c4a8e8be FW |
616 | } |
617 | ||
19a7fe20 | 618 | lat_print_timestamp(iter, next_ts); |
8be0709f | 619 | |
19a7fe20 | 620 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
621 | } |
622 | ||
f633cef0 SR |
623 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
624 | ||
625 | static int task_state_char(unsigned long state) | |
626 | { | |
627 | int bit = state ? __ffs(state) + 1 : 0; | |
628 | ||
629 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
630 | } | |
631 | ||
f0868d1e SR |
632 | /** |
633 | * ftrace_find_event - find a registered event | |
634 | * @type: the type of event to look for | |
635 | * | |
636 | * Returns an event of type @type otherwise NULL | |
4f535968 | 637 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
638 | */ |
639 | struct trace_event *ftrace_find_event(int type) | |
640 | { | |
641 | struct trace_event *event; | |
f0868d1e SR |
642 | unsigned key; |
643 | ||
644 | key = type & (EVENT_HASHSIZE - 1); | |
645 | ||
b67bfe0d | 646 | hlist_for_each_entry(event, &event_hash[key], node) { |
f0868d1e SR |
647 | if (event->type == type) |
648 | return event; | |
649 | } | |
650 | ||
651 | return NULL; | |
652 | } | |
653 | ||
060fa5c8 SR |
654 | static LIST_HEAD(ftrace_event_list); |
655 | ||
656 | static int trace_search_list(struct list_head **list) | |
657 | { | |
658 | struct trace_event *e; | |
659 | int last = __TRACE_LAST_TYPE; | |
660 | ||
661 | if (list_empty(&ftrace_event_list)) { | |
662 | *list = &ftrace_event_list; | |
663 | return last + 1; | |
664 | } | |
665 | ||
666 | /* | |
667 | * We used up all possible max events, | |
668 | * lets see if somebody freed one. | |
669 | */ | |
670 | list_for_each_entry(e, &ftrace_event_list, list) { | |
671 | if (e->type != last + 1) | |
672 | break; | |
673 | last++; | |
674 | } | |
675 | ||
676 | /* Did we used up all 65 thousand events??? */ | |
677 | if ((last + 1) > FTRACE_MAX_EVENT) | |
678 | return 0; | |
679 | ||
680 | *list = &e->list; | |
681 | return last + 1; | |
682 | } | |
683 | ||
4f535968 LJ |
684 | void trace_event_read_lock(void) |
685 | { | |
52f6ad6d | 686 | down_read(&trace_event_sem); |
4f535968 LJ |
687 | } |
688 | ||
689 | void trace_event_read_unlock(void) | |
690 | { | |
52f6ad6d | 691 | up_read(&trace_event_sem); |
4f535968 LJ |
692 | } |
693 | ||
f0868d1e SR |
694 | /** |
695 | * register_ftrace_event - register output for an event type | |
696 | * @event: the event type to register | |
697 | * | |
698 | * Event types are stored in a hash and this hash is used to | |
699 | * find a way to print an event. If the @event->type is set | |
700 | * then it will use that type, otherwise it will assign a | |
701 | * type to use. | |
702 | * | |
703 | * If you assign your own type, please make sure it is added | |
704 | * to the trace_type enum in trace.h, to avoid collisions | |
705 | * with the dynamic types. | |
706 | * | |
707 | * Returns the event type number or zero on error. | |
708 | */ | |
709 | int register_ftrace_event(struct trace_event *event) | |
710 | { | |
711 | unsigned key; | |
712 | int ret = 0; | |
713 | ||
52f6ad6d | 714 | down_write(&trace_event_sem); |
f0868d1e | 715 | |
060fa5c8 | 716 | if (WARN_ON(!event)) |
28bea271 | 717 | goto out; |
28bea271 | 718 | |
a9a57763 SR |
719 | if (WARN_ON(!event->funcs)) |
720 | goto out; | |
721 | ||
060fa5c8 SR |
722 | INIT_LIST_HEAD(&event->list); |
723 | ||
724 | if (!event->type) { | |
48dd0fed | 725 | struct list_head *list = NULL; |
060fa5c8 SR |
726 | |
727 | if (next_event_type > FTRACE_MAX_EVENT) { | |
728 | ||
729 | event->type = trace_search_list(&list); | |
730 | if (!event->type) | |
731 | goto out; | |
732 | ||
733 | } else { | |
8e1e1df2 | 734 | |
060fa5c8 SR |
735 | event->type = next_event_type++; |
736 | list = &ftrace_event_list; | |
737 | } | |
738 | ||
739 | if (WARN_ON(ftrace_find_event(event->type))) | |
740 | goto out; | |
741 | ||
742 | list_add_tail(&event->list, list); | |
743 | ||
744 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
745 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
746 | WARN_ON(1); | |
f0868d1e | 747 | goto out; |
060fa5c8 SR |
748 | } else { |
749 | /* Is this event already used */ | |
750 | if (ftrace_find_event(event->type)) | |
751 | goto out; | |
752 | } | |
f0868d1e | 753 | |
a9a57763 SR |
754 | if (event->funcs->trace == NULL) |
755 | event->funcs->trace = trace_nop_print; | |
756 | if (event->funcs->raw == NULL) | |
757 | event->funcs->raw = trace_nop_print; | |
758 | if (event->funcs->hex == NULL) | |
759 | event->funcs->hex = trace_nop_print; | |
760 | if (event->funcs->binary == NULL) | |
761 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 762 | |
f0868d1e SR |
763 | key = event->type & (EVENT_HASHSIZE - 1); |
764 | ||
4f535968 | 765 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
766 | |
767 | ret = event->type; | |
768 | out: | |
52f6ad6d | 769 | up_write(&trace_event_sem); |
f0868d1e SR |
770 | |
771 | return ret; | |
772 | } | |
17c873ec | 773 | EXPORT_SYMBOL_GPL(register_ftrace_event); |
f0868d1e | 774 | |
110bf2b7 | 775 | /* |
52f6ad6d | 776 | * Used by module code with the trace_event_sem held for write. |
110bf2b7 SR |
777 | */ |
778 | int __unregister_ftrace_event(struct trace_event *event) | |
779 | { | |
780 | hlist_del(&event->node); | |
781 | list_del(&event->list); | |
782 | return 0; | |
783 | } | |
784 | ||
f0868d1e SR |
785 | /** |
786 | * unregister_ftrace_event - remove a no longer used event | |
787 | * @event: the event to remove | |
788 | */ | |
789 | int unregister_ftrace_event(struct trace_event *event) | |
790 | { | |
52f6ad6d | 791 | down_write(&trace_event_sem); |
110bf2b7 | 792 | __unregister_ftrace_event(event); |
52f6ad6d | 793 | up_write(&trace_event_sem); |
f0868d1e SR |
794 | |
795 | return 0; | |
796 | } | |
17c873ec | 797 | EXPORT_SYMBOL_GPL(unregister_ftrace_event); |
f633cef0 SR |
798 | |
799 | /* | |
800 | * Standard events | |
801 | */ | |
802 | ||
a9a57763 SR |
803 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
804 | struct trace_event *event) | |
f633cef0 | 805 | { |
19a7fe20 | 806 | trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type); |
ee5e51f5 | 807 | |
19a7fe20 | 808 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
809 | } |
810 | ||
811 | /* TRACE_FN */ | |
a9a57763 SR |
812 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
813 | struct trace_event *event) | |
f633cef0 SR |
814 | { |
815 | struct ftrace_entry *field; | |
2c9b238e | 816 | struct trace_seq *s = &iter->seq; |
f633cef0 | 817 | |
2c9b238e | 818 | trace_assign_type(field, iter->ent); |
f633cef0 | 819 | |
19a7fe20 | 820 | seq_print_ip_sym(s, field->ip, flags); |
f633cef0 SR |
821 | |
822 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
19a7fe20 SRRH |
823 | trace_seq_puts(s, " <-"); |
824 | seq_print_ip_sym(s, field->parent_ip, flags); | |
f633cef0 | 825 | } |
f633cef0 | 826 | |
19a7fe20 | 827 | trace_seq_putc(s, '\n'); |
f633cef0 | 828 | |
19a7fe20 | 829 | return trace_handle_return(s); |
f633cef0 SR |
830 | } |
831 | ||
a9a57763 SR |
832 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
833 | struct trace_event *event) | |
f633cef0 SR |
834 | { |
835 | struct ftrace_entry *field; | |
836 | ||
2c9b238e | 837 | trace_assign_type(field, iter->ent); |
f633cef0 | 838 | |
19a7fe20 SRRH |
839 | trace_seq_printf(&iter->seq, "%lx %lx\n", |
840 | field->ip, | |
841 | field->parent_ip); | |
f633cef0 | 842 | |
19a7fe20 | 843 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
844 | } |
845 | ||
a9a57763 SR |
846 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
847 | struct trace_event *event) | |
f633cef0 SR |
848 | { |
849 | struct ftrace_entry *field; | |
2c9b238e | 850 | struct trace_seq *s = &iter->seq; |
f633cef0 | 851 | |
2c9b238e | 852 | trace_assign_type(field, iter->ent); |
f633cef0 | 853 | |
19a7fe20 SRRH |
854 | SEQ_PUT_HEX_FIELD(s, field->ip); |
855 | SEQ_PUT_HEX_FIELD(s, field->parent_ip); | |
f633cef0 | 856 | |
19a7fe20 | 857 | return trace_handle_return(s); |
f633cef0 SR |
858 | } |
859 | ||
a9a57763 SR |
860 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
861 | struct trace_event *event) | |
f633cef0 SR |
862 | { |
863 | struct ftrace_entry *field; | |
2c9b238e | 864 | struct trace_seq *s = &iter->seq; |
f633cef0 | 865 | |
2c9b238e | 866 | trace_assign_type(field, iter->ent); |
f633cef0 | 867 | |
19a7fe20 SRRH |
868 | SEQ_PUT_FIELD(s, field->ip); |
869 | SEQ_PUT_FIELD(s, field->parent_ip); | |
f633cef0 | 870 | |
19a7fe20 | 871 | return trace_handle_return(s); |
f633cef0 SR |
872 | } |
873 | ||
a9a57763 | 874 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 875 | .trace = trace_fn_trace, |
f633cef0 SR |
876 | .raw = trace_fn_raw, |
877 | .hex = trace_fn_hex, | |
878 | .binary = trace_fn_bin, | |
879 | }; | |
880 | ||
a9a57763 SR |
881 | static struct trace_event trace_fn_event = { |
882 | .type = TRACE_FN, | |
883 | .funcs = &trace_fn_funcs, | |
884 | }; | |
885 | ||
f633cef0 | 886 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
887 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
888 | char *delim) | |
f633cef0 SR |
889 | { |
890 | struct ctx_switch_entry *field; | |
4ca53085 | 891 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
892 | int S, T; |
893 | ||
4ca53085 | 894 | |
2c9b238e | 895 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
896 | |
897 | T = task_state_char(field->next_state); | |
898 | S = task_state_char(field->prev_state); | |
4ca53085 | 899 | trace_find_cmdline(field->next_pid, comm); |
19a7fe20 SRRH |
900 | trace_seq_printf(&iter->seq, |
901 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
902 | field->prev_pid, | |
903 | field->prev_prio, | |
904 | S, delim, | |
905 | field->next_cpu, | |
906 | field->next_pid, | |
907 | field->next_prio, | |
908 | T, comm); | |
909 | ||
910 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
911 | } |
912 | ||
a9a57763 SR |
913 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
914 | struct trace_event *event) | |
f633cef0 | 915 | { |
2c9b238e | 916 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
917 | } |
918 | ||
ae7462b4 | 919 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 920 | int flags, struct trace_event *event) |
f633cef0 | 921 | { |
2c9b238e | 922 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
923 | } |
924 | ||
2c9b238e | 925 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
926 | { |
927 | struct ctx_switch_entry *field; | |
928 | int T; | |
929 | ||
2c9b238e | 930 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
931 | |
932 | if (!S) | |
b0f56f1a | 933 | S = task_state_char(field->prev_state); |
f633cef0 | 934 | T = task_state_char(field->next_state); |
19a7fe20 SRRH |
935 | trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
936 | field->prev_pid, | |
937 | field->prev_prio, | |
938 | S, | |
939 | field->next_cpu, | |
940 | field->next_pid, | |
941 | field->next_prio, | |
942 | T); | |
943 | ||
944 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
945 | } |
946 | ||
a9a57763 SR |
947 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
948 | struct trace_event *event) | |
f633cef0 | 949 | { |
2c9b238e | 950 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
951 | } |
952 | ||
a9a57763 SR |
953 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
954 | struct trace_event *event) | |
f633cef0 | 955 | { |
2c9b238e | 956 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
957 | } |
958 | ||
959 | ||
2c9b238e | 960 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
961 | { |
962 | struct ctx_switch_entry *field; | |
2c9b238e | 963 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
964 | int T; |
965 | ||
2c9b238e | 966 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
967 | |
968 | if (!S) | |
b0f56f1a | 969 | S = task_state_char(field->prev_state); |
f633cef0 SR |
970 | T = task_state_char(field->next_state); |
971 | ||
19a7fe20 SRRH |
972 | SEQ_PUT_HEX_FIELD(s, field->prev_pid); |
973 | SEQ_PUT_HEX_FIELD(s, field->prev_prio); | |
974 | SEQ_PUT_HEX_FIELD(s, S); | |
975 | SEQ_PUT_HEX_FIELD(s, field->next_cpu); | |
976 | SEQ_PUT_HEX_FIELD(s, field->next_pid); | |
977 | SEQ_PUT_HEX_FIELD(s, field->next_prio); | |
978 | SEQ_PUT_HEX_FIELD(s, T); | |
f633cef0 | 979 | |
19a7fe20 | 980 | return trace_handle_return(s); |
f633cef0 SR |
981 | } |
982 | ||
a9a57763 SR |
983 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
984 | struct trace_event *event) | |
f633cef0 | 985 | { |
2c9b238e | 986 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
987 | } |
988 | ||
a9a57763 SR |
989 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
990 | struct trace_event *event) | |
f633cef0 | 991 | { |
2c9b238e | 992 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
993 | } |
994 | ||
ae7462b4 | 995 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 996 | int flags, struct trace_event *event) |
f633cef0 SR |
997 | { |
998 | struct ctx_switch_entry *field; | |
2c9b238e | 999 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1000 | |
2c9b238e | 1001 | trace_assign_type(field, iter->ent); |
f633cef0 | 1002 | |
19a7fe20 SRRH |
1003 | SEQ_PUT_FIELD(s, field->prev_pid); |
1004 | SEQ_PUT_FIELD(s, field->prev_prio); | |
1005 | SEQ_PUT_FIELD(s, field->prev_state); | |
1006 | SEQ_PUT_FIELD(s, field->next_cpu); | |
1007 | SEQ_PUT_FIELD(s, field->next_pid); | |
1008 | SEQ_PUT_FIELD(s, field->next_prio); | |
1009 | SEQ_PUT_FIELD(s, field->next_state); | |
f633cef0 | 1010 | |
19a7fe20 | 1011 | return trace_handle_return(s); |
f633cef0 SR |
1012 | } |
1013 | ||
a9a57763 | 1014 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1015 | .trace = trace_ctx_print, |
f633cef0 SR |
1016 | .raw = trace_ctx_raw, |
1017 | .hex = trace_ctx_hex, | |
1018 | .binary = trace_ctxwake_bin, | |
1019 | }; | |
1020 | ||
a9a57763 SR |
1021 | static struct trace_event trace_ctx_event = { |
1022 | .type = TRACE_CTX, | |
1023 | .funcs = &trace_ctx_funcs, | |
1024 | }; | |
1025 | ||
1026 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1027 | .trace = trace_wake_print, |
f633cef0 SR |
1028 | .raw = trace_wake_raw, |
1029 | .hex = trace_wake_hex, | |
1030 | .binary = trace_ctxwake_bin, | |
1031 | }; | |
1032 | ||
a9a57763 SR |
1033 | static struct trace_event trace_wake_event = { |
1034 | .type = TRACE_WAKE, | |
1035 | .funcs = &trace_wake_funcs, | |
1036 | }; | |
1037 | ||
f633cef0 SR |
1038 | /* TRACE_STACK */ |
1039 | ||
ae7462b4 | 1040 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1041 | int flags, struct trace_event *event) |
f633cef0 SR |
1042 | { |
1043 | struct stack_entry *field; | |
2c9b238e | 1044 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1045 | unsigned long *p; |
1046 | unsigned long *end; | |
f633cef0 | 1047 | |
2c9b238e | 1048 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1049 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1050 | |
19a7fe20 | 1051 | trace_seq_puts(s, "<stack trace>\n"); |
4a9bd3f1 SR |
1052 | |
1053 | for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { | |
f633cef0 | 1054 | |
19a7fe20 SRRH |
1055 | if (trace_seq_has_overflowed(s)) |
1056 | break; | |
f633cef0 | 1057 | |
19a7fe20 SRRH |
1058 | trace_seq_puts(s, " => "); |
1059 | seq_print_ip_sym(s, *p, flags); | |
1060 | trace_seq_putc(s, '\n'); | |
1061 | } | |
f633cef0 | 1062 | |
19a7fe20 | 1063 | return trace_handle_return(s); |
f633cef0 SR |
1064 | } |
1065 | ||
a9a57763 | 1066 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1067 | .trace = trace_stack_print, |
f633cef0 SR |
1068 | }; |
1069 | ||
a9a57763 SR |
1070 | static struct trace_event trace_stack_event = { |
1071 | .type = TRACE_STACK, | |
1072 | .funcs = &trace_stack_funcs, | |
1073 | }; | |
1074 | ||
f633cef0 | 1075 | /* TRACE_USER_STACK */ |
ae7462b4 | 1076 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1077 | int flags, struct trace_event *event) |
f633cef0 SR |
1078 | { |
1079 | struct userstack_entry *field; | |
2c9b238e | 1080 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1081 | |
2c9b238e | 1082 | trace_assign_type(field, iter->ent); |
f633cef0 | 1083 | |
19a7fe20 SRRH |
1084 | trace_seq_puts(s, "<user stack trace>\n"); |
1085 | seq_print_userip_objs(field, s, flags); | |
f633cef0 | 1086 | |
19a7fe20 | 1087 | return trace_handle_return(s); |
f633cef0 SR |
1088 | } |
1089 | ||
a9a57763 | 1090 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1091 | .trace = trace_user_stack_print, |
f633cef0 SR |
1092 | }; |
1093 | ||
a9a57763 SR |
1094 | static struct trace_event trace_user_stack_event = { |
1095 | .type = TRACE_USER_STACK, | |
1096 | .funcs = &trace_user_stack_funcs, | |
1097 | }; | |
1098 | ||
09ae7234 SRRH |
1099 | /* TRACE_BPUTS */ |
1100 | static enum print_line_t | |
1101 | trace_bputs_print(struct trace_iterator *iter, int flags, | |
1102 | struct trace_event *event) | |
1103 | { | |
1104 | struct trace_entry *entry = iter->ent; | |
1105 | struct trace_seq *s = &iter->seq; | |
1106 | struct bputs_entry *field; | |
1107 | ||
1108 | trace_assign_type(field, entry); | |
1109 | ||
19a7fe20 SRRH |
1110 | seq_print_ip_sym(s, field->ip, flags); |
1111 | trace_seq_puts(s, ": "); | |
1112 | trace_seq_puts(s, field->str); | |
09ae7234 | 1113 | |
19a7fe20 | 1114 | return trace_handle_return(s); |
09ae7234 SRRH |
1115 | } |
1116 | ||
1117 | ||
1118 | static enum print_line_t | |
1119 | trace_bputs_raw(struct trace_iterator *iter, int flags, | |
1120 | struct trace_event *event) | |
1121 | { | |
1122 | struct bputs_entry *field; | |
1123 | struct trace_seq *s = &iter->seq; | |
1124 | ||
1125 | trace_assign_type(field, iter->ent); | |
1126 | ||
19a7fe20 SRRH |
1127 | trace_seq_printf(s, ": %lx : ", field->ip); |
1128 | trace_seq_puts(s, field->str); | |
09ae7234 | 1129 | |
19a7fe20 | 1130 | return trace_handle_return(s); |
09ae7234 SRRH |
1131 | } |
1132 | ||
1133 | static struct trace_event_functions trace_bputs_funcs = { | |
1134 | .trace = trace_bputs_print, | |
1135 | .raw = trace_bputs_raw, | |
1136 | }; | |
1137 | ||
1138 | static struct trace_event trace_bputs_event = { | |
1139 | .type = TRACE_BPUTS, | |
1140 | .funcs = &trace_bputs_funcs, | |
1141 | }; | |
1142 | ||
48ead020 | 1143 | /* TRACE_BPRINT */ |
1427cdf0 | 1144 | static enum print_line_t |
a9a57763 SR |
1145 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1146 | struct trace_event *event) | |
1427cdf0 LJ |
1147 | { |
1148 | struct trace_entry *entry = iter->ent; | |
1149 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1150 | struct bprint_entry *field; |
1427cdf0 LJ |
1151 | |
1152 | trace_assign_type(field, entry); | |
1153 | ||
19a7fe20 SRRH |
1154 | seq_print_ip_sym(s, field->ip, flags); |
1155 | trace_seq_puts(s, ": "); | |
1156 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1157 | |
19a7fe20 | 1158 | return trace_handle_return(s); |
1427cdf0 LJ |
1159 | } |
1160 | ||
769b0441 | 1161 | |
48ead020 | 1162 | static enum print_line_t |
a9a57763 SR |
1163 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1164 | struct trace_event *event) | |
1427cdf0 | 1165 | { |
48ead020 | 1166 | struct bprint_entry *field; |
1427cdf0 | 1167 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1168 | |
769b0441 | 1169 | trace_assign_type(field, iter->ent); |
1427cdf0 | 1170 | |
19a7fe20 SRRH |
1171 | trace_seq_printf(s, ": %lx : ", field->ip); |
1172 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1173 | |
19a7fe20 | 1174 | return trace_handle_return(s); |
1427cdf0 LJ |
1175 | } |
1176 | ||
a9a57763 SR |
1177 | static struct trace_event_functions trace_bprint_funcs = { |
1178 | .trace = trace_bprint_print, | |
1179 | .raw = trace_bprint_raw, | |
1180 | }; | |
769b0441 | 1181 | |
48ead020 FW |
1182 | static struct trace_event trace_bprint_event = { |
1183 | .type = TRACE_BPRINT, | |
a9a57763 | 1184 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1185 | }; |
1186 | ||
1187 | /* TRACE_PRINT */ | |
1188 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1189 | int flags, struct trace_event *event) |
48ead020 FW |
1190 | { |
1191 | struct print_entry *field; | |
1192 | struct trace_seq *s = &iter->seq; | |
1193 | ||
1194 | trace_assign_type(field, iter->ent); | |
1195 | ||
19a7fe20 SRRH |
1196 | seq_print_ip_sym(s, field->ip, flags); |
1197 | trace_seq_printf(s, ": %s", field->buf); | |
48ead020 | 1198 | |
19a7fe20 | 1199 | return trace_handle_return(s); |
48ead020 FW |
1200 | } |
1201 | ||
a9a57763 SR |
1202 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1203 | struct trace_event *event) | |
48ead020 FW |
1204 | { |
1205 | struct print_entry *field; | |
1206 | ||
1207 | trace_assign_type(field, iter->ent); | |
1208 | ||
19a7fe20 | 1209 | trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf); |
48ead020 | 1210 | |
19a7fe20 | 1211 | return trace_handle_return(&iter->seq); |
48ead020 FW |
1212 | } |
1213 | ||
a9a57763 | 1214 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1215 | .trace = trace_print_print, |
1216 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1217 | }; |
1218 | ||
a9a57763 SR |
1219 | static struct trace_event trace_print_event = { |
1220 | .type = TRACE_PRINT, | |
1221 | .funcs = &trace_print_funcs, | |
1222 | }; | |
1223 | ||
48ead020 | 1224 | |
f633cef0 SR |
1225 | static struct trace_event *events[] __initdata = { |
1226 | &trace_fn_event, | |
1227 | &trace_ctx_event, | |
1228 | &trace_wake_event, | |
f633cef0 SR |
1229 | &trace_stack_event, |
1230 | &trace_user_stack_event, | |
09ae7234 | 1231 | &trace_bputs_event, |
48ead020 | 1232 | &trace_bprint_event, |
f633cef0 SR |
1233 | &trace_print_event, |
1234 | NULL | |
1235 | }; | |
1236 | ||
1237 | __init static int init_events(void) | |
1238 | { | |
1239 | struct trace_event *event; | |
1240 | int i, ret; | |
1241 | ||
1242 | for (i = 0; events[i]; i++) { | |
1243 | event = events[i]; | |
1244 | ||
1245 | ret = register_ftrace_event(event); | |
1246 | if (!ret) { | |
1247 | printk(KERN_WARNING "event %d failed to register\n", | |
1248 | event->type); | |
1249 | WARN_ON_ONCE(1); | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | return 0; | |
1254 | } | |
7374e827 | 1255 | early_initcall(init_events); |