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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> | |
e6017571 | 11 | #include <linux/sched/clock.h> |
6e84f315 | 12 | #include <linux/sched/mm.h> |
f0868d1e SR |
13 | |
14 | #include "trace_output.h" | |
15 | ||
16 | /* must be a power of 2 */ | |
17 | #define EVENT_HASHSIZE 128 | |
18 | ||
52f6ad6d | 19 | DECLARE_RWSEM(trace_event_sem); |
be74b73a | 20 | |
f0868d1e SR |
21 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; |
22 | ||
23 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
24 | ||
09ae7234 SRRH |
25 | enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter) |
26 | { | |
27 | struct trace_seq *s = &iter->seq; | |
28 | struct trace_entry *entry = iter->ent; | |
29 | struct bputs_entry *field; | |
09ae7234 SRRH |
30 | |
31 | trace_assign_type(field, entry); | |
32 | ||
19a7fe20 | 33 | trace_seq_puts(s, field->str); |
09ae7234 | 34 | |
19a7fe20 | 35 | return trace_handle_return(s); |
09ae7234 SRRH |
36 | } |
37 | ||
5ef841f6 SR |
38 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
39 | { | |
40 | struct trace_seq *s = &iter->seq; | |
41 | struct trace_entry *entry = iter->ent; | |
42 | struct bprint_entry *field; | |
5ef841f6 SR |
43 | |
44 | trace_assign_type(field, entry); | |
45 | ||
19a7fe20 | 46 | trace_seq_bprintf(s, field->fmt, field->buf); |
5ef841f6 | 47 | |
19a7fe20 | 48 | return trace_handle_return(s); |
5ef841f6 SR |
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; | |
5ef841f6 SR |
56 | |
57 | trace_assign_type(field, entry); | |
58 | ||
19a7fe20 | 59 | trace_seq_puts(s, field->buf); |
5ef841f6 | 60 | |
19a7fe20 | 61 | return trace_handle_return(s); |
5ef841f6 SR |
62 | } |
63 | ||
be74b73a | 64 | const char * |
645df987 SRRH |
65 | trace_print_flags_seq(struct trace_seq *p, const char *delim, |
66 | unsigned long flags, | |
67 | const struct trace_print_flags *flag_array) | |
be74b73a SR |
68 | { |
69 | unsigned long mask; | |
70 | const char *str; | |
7b039cb4 | 71 | const char *ret = trace_seq_buffer_ptr(p); |
e404b321 | 72 | int i, first = 1; |
be74b73a | 73 | |
be74b73a SR |
74 | for (i = 0; flag_array[i].name && flags; i++) { |
75 | ||
76 | mask = flag_array[i].mask; | |
77 | if ((flags & mask) != mask) | |
78 | continue; | |
79 | ||
80 | str = flag_array[i].name; | |
81 | flags &= ~mask; | |
e404b321 | 82 | if (!first && delim) |
be74b73a | 83 | trace_seq_puts(p, delim); |
e404b321 AV |
84 | else |
85 | first = 0; | |
be74b73a SR |
86 | trace_seq_puts(p, str); |
87 | } | |
88 | ||
89 | /* check for left over flags */ | |
90 | if (flags) { | |
5b349261 | 91 | if (!first && delim) |
be74b73a SR |
92 | trace_seq_puts(p, delim); |
93 | trace_seq_printf(p, "0x%lx", flags); | |
94 | } | |
95 | ||
96 | trace_seq_putc(p, 0); | |
97 | ||
56d8bd3f | 98 | return ret; |
be74b73a | 99 | } |
645df987 | 100 | EXPORT_SYMBOL(trace_print_flags_seq); |
be74b73a | 101 | |
0f4fc29d | 102 | const char * |
645df987 SRRH |
103 | trace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
104 | const struct trace_print_flags *symbol_array) | |
0f4fc29d SR |
105 | { |
106 | int i; | |
7b039cb4 | 107 | const char *ret = trace_seq_buffer_ptr(p); |
0f4fc29d SR |
108 | |
109 | for (i = 0; symbol_array[i].name; i++) { | |
110 | ||
111 | if (val != symbol_array[i].mask) | |
112 | continue; | |
113 | ||
114 | trace_seq_puts(p, symbol_array[i].name); | |
115 | break; | |
116 | } | |
117 | ||
7b039cb4 | 118 | if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
0f4fc29d | 119 | trace_seq_printf(p, "0x%lx", val); |
8e1e1df2 | 120 | |
0f4fc29d SR |
121 | trace_seq_putc(p, 0); |
122 | ||
56d8bd3f | 123 | return ret; |
0f4fc29d | 124 | } |
645df987 | 125 | EXPORT_SYMBOL(trace_print_symbols_seq); |
0f4fc29d | 126 | |
2fc1b6f0 | 127 | #if BITS_PER_LONG == 32 |
d3213e8f RZ |
128 | const char * |
129 | trace_print_flags_seq_u64(struct trace_seq *p, const char *delim, | |
130 | unsigned long long flags, | |
131 | const struct trace_print_flags_u64 *flag_array) | |
132 | { | |
133 | unsigned long long mask; | |
134 | const char *str; | |
135 | const char *ret = trace_seq_buffer_ptr(p); | |
136 | int i, first = 1; | |
137 | ||
138 | for (i = 0; flag_array[i].name && flags; i++) { | |
139 | ||
140 | mask = flag_array[i].mask; | |
141 | if ((flags & mask) != mask) | |
142 | continue; | |
143 | ||
144 | str = flag_array[i].name; | |
145 | flags &= ~mask; | |
146 | if (!first && delim) | |
147 | trace_seq_puts(p, delim); | |
148 | else | |
149 | first = 0; | |
150 | trace_seq_puts(p, str); | |
151 | } | |
152 | ||
153 | /* check for left over flags */ | |
154 | if (flags) { | |
155 | if (!first && delim) | |
156 | trace_seq_puts(p, delim); | |
157 | trace_seq_printf(p, "0x%llx", flags); | |
158 | } | |
159 | ||
160 | trace_seq_putc(p, 0); | |
161 | ||
162 | return ret; | |
163 | } | |
164 | EXPORT_SYMBOL(trace_print_flags_seq_u64); | |
165 | ||
2fc1b6f0 | 166 | const char * |
645df987 | 167 | trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, |
2fc1b6f0 | 168 | const struct trace_print_flags_u64 *symbol_array) |
169 | { | |
170 | int i; | |
7b039cb4 | 171 | const char *ret = trace_seq_buffer_ptr(p); |
2fc1b6f0 | 172 | |
173 | for (i = 0; symbol_array[i].name; i++) { | |
174 | ||
175 | if (val != symbol_array[i].mask) | |
176 | continue; | |
177 | ||
178 | trace_seq_puts(p, symbol_array[i].name); | |
179 | break; | |
180 | } | |
181 | ||
7b039cb4 | 182 | if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
2fc1b6f0 | 183 | trace_seq_printf(p, "0x%llx", val); |
184 | ||
185 | trace_seq_putc(p, 0); | |
186 | ||
187 | return ret; | |
188 | } | |
645df987 | 189 | EXPORT_SYMBOL(trace_print_symbols_seq_u64); |
2fc1b6f0 | 190 | #endif |
191 | ||
4449bf92 | 192 | const char * |
645df987 SRRH |
193 | trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, |
194 | unsigned int bitmask_size) | |
4449bf92 | 195 | { |
7b039cb4 | 196 | const char *ret = trace_seq_buffer_ptr(p); |
4449bf92 SRRH |
197 | |
198 | trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8); | |
199 | trace_seq_putc(p, 0); | |
200 | ||
201 | return ret; | |
202 | } | |
645df987 | 203 | EXPORT_SYMBOL_GPL(trace_print_bitmask_seq); |
4449bf92 | 204 | |
3898fac1 DB |
205 | /** |
206 | * trace_print_hex_seq - print buffer as hex sequence | |
207 | * @p: trace seq struct to write to | |
208 | * @buf: The buffer to print | |
209 | * @buf_len: Length of @buf in bytes | |
210 | * @concatenate: Print @buf as single hex string or with spacing | |
211 | * | |
212 | * Prints the passed buffer as a hex sequence either as a whole, | |
213 | * single hex string if @concatenate is true or with spacing after | |
214 | * each byte in case @concatenate is false. | |
215 | */ | |
5a2e3995 | 216 | const char * |
2acae0d5 | 217 | trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len, |
3898fac1 | 218 | bool concatenate) |
5a2e3995 KT |
219 | { |
220 | int i; | |
7b039cb4 | 221 | const char *ret = trace_seq_buffer_ptr(p); |
5a2e3995 KT |
222 | |
223 | for (i = 0; i < buf_len; i++) | |
3898fac1 | 224 | trace_seq_printf(p, "%s%2.2x", concatenate || i == 0 ? "" : " ", |
2acae0d5 | 225 | buf[i]); |
5a2e3995 KT |
226 | trace_seq_putc(p, 0); |
227 | ||
228 | return ret; | |
229 | } | |
645df987 | 230 | EXPORT_SYMBOL(trace_print_hex_seq); |
5a2e3995 | 231 | |
6ea22486 | 232 | const char * |
645df987 SRRH |
233 | trace_print_array_seq(struct trace_seq *p, const void *buf, int count, |
234 | size_t el_size) | |
6ea22486 DM |
235 | { |
236 | const char *ret = trace_seq_buffer_ptr(p); | |
237 | const char *prefix = ""; | |
238 | void *ptr = (void *)buf; | |
ac01ce14 | 239 | size_t buf_len = count * el_size; |
6ea22486 DM |
240 | |
241 | trace_seq_putc(p, '{'); | |
242 | ||
243 | while (ptr < buf + buf_len) { | |
244 | switch (el_size) { | |
245 | case 1: | |
246 | trace_seq_printf(p, "%s0x%x", prefix, | |
247 | *(u8 *)ptr); | |
248 | break; | |
249 | case 2: | |
250 | trace_seq_printf(p, "%s0x%x", prefix, | |
251 | *(u16 *)ptr); | |
252 | break; | |
253 | case 4: | |
254 | trace_seq_printf(p, "%s0x%x", prefix, | |
255 | *(u32 *)ptr); | |
256 | break; | |
257 | case 8: | |
258 | trace_seq_printf(p, "%s0x%llx", prefix, | |
259 | *(u64 *)ptr); | |
260 | break; | |
261 | default: | |
262 | trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size, | |
263 | *(u8 *)ptr); | |
264 | el_size = 1; | |
265 | } | |
266 | prefix = ","; | |
267 | ptr += el_size; | |
268 | } | |
269 | ||
270 | trace_seq_putc(p, '}'); | |
271 | trace_seq_putc(p, 0); | |
272 | ||
273 | return ret; | |
274 | } | |
645df987 | 275 | EXPORT_SYMBOL(trace_print_array_seq); |
6ea22486 | 276 | |
892c505a SRRH |
277 | int trace_raw_output_prep(struct trace_iterator *iter, |
278 | struct trace_event *trace_event) | |
f71130de | 279 | { |
2425bcb9 | 280 | struct trace_event_call *event; |
f71130de LZ |
281 | struct trace_seq *s = &iter->seq; |
282 | struct trace_seq *p = &iter->tmp_seq; | |
283 | struct trace_entry *entry; | |
f71130de | 284 | |
2425bcb9 | 285 | event = container_of(trace_event, struct trace_event_call, event); |
f71130de LZ |
286 | entry = iter->ent; |
287 | ||
288 | if (entry->type != event->event.type) { | |
289 | WARN_ON_ONCE(1); | |
290 | return TRACE_TYPE_UNHANDLED; | |
291 | } | |
292 | ||
293 | trace_seq_init(p); | |
687fcc4a | 294 | trace_seq_printf(s, "%s: ", trace_event_name(event)); |
19a7fe20 | 295 | |
8e2e095c | 296 | return trace_handle_return(s); |
f71130de | 297 | } |
892c505a | 298 | EXPORT_SYMBOL(trace_raw_output_prep); |
f71130de | 299 | |
892c505a SRRH |
300 | static int trace_output_raw(struct trace_iterator *iter, char *name, |
301 | char *fmt, va_list ap) | |
1d6bae96 SR |
302 | { |
303 | struct trace_seq *s = &iter->seq; | |
1d6bae96 | 304 | |
19a7fe20 SRRH |
305 | trace_seq_printf(s, "%s: ", name); |
306 | trace_seq_vprintf(s, fmt, ap); | |
1d6bae96 | 307 | |
19a7fe20 | 308 | return trace_handle_return(s); |
1d6bae96 SR |
309 | } |
310 | ||
892c505a | 311 | int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...) |
1d6bae96 SR |
312 | { |
313 | va_list ap; | |
314 | int ret; | |
315 | ||
316 | va_start(ap, fmt); | |
892c505a | 317 | ret = trace_output_raw(iter, name, fmt, ap); |
1d6bae96 SR |
318 | va_end(ap); |
319 | ||
320 | return ret; | |
321 | } | |
892c505a | 322 | EXPORT_SYMBOL_GPL(trace_output_call); |
1d6bae96 | 323 | |
f0868d1e SR |
324 | #ifdef CONFIG_KRETPROBES |
325 | static inline const char *kretprobed(const char *name) | |
326 | { | |
327 | static const char tramp_name[] = "kretprobe_trampoline"; | |
328 | int size = sizeof(tramp_name); | |
329 | ||
330 | if (strncmp(tramp_name, name, size) == 0) | |
331 | return "[unknown/kretprobe'd]"; | |
332 | return name; | |
333 | } | |
334 | #else | |
335 | static inline const char *kretprobed(const char *name) | |
336 | { | |
337 | return name; | |
338 | } | |
339 | #endif /* CONFIG_KRETPROBES */ | |
340 | ||
19a7fe20 | 341 | static void |
f0868d1e SR |
342 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) |
343 | { | |
344 | #ifdef CONFIG_KALLSYMS | |
345 | char str[KSYM_SYMBOL_LEN]; | |
346 | const char *name; | |
347 | ||
348 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
349 | ||
350 | name = kretprobed(str); | |
351 | ||
19a7fe20 | 352 | trace_seq_printf(s, fmt, name); |
f0868d1e | 353 | #endif |
f0868d1e SR |
354 | } |
355 | ||
19a7fe20 | 356 | static void |
f0868d1e SR |
357 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, |
358 | unsigned long address) | |
359 | { | |
360 | #ifdef CONFIG_KALLSYMS | |
361 | char str[KSYM_SYMBOL_LEN]; | |
362 | const char *name; | |
363 | ||
364 | sprint_symbol(str, address); | |
365 | name = kretprobed(str); | |
366 | ||
19a7fe20 | 367 | trace_seq_printf(s, fmt, name); |
f0868d1e | 368 | #endif |
f0868d1e SR |
369 | } |
370 | ||
371 | #ifndef CONFIG_64BIT | |
372 | # define IP_FMT "%08lx" | |
373 | #else | |
374 | # define IP_FMT "%016lx" | |
375 | #endif | |
376 | ||
ef92480a SRRH |
377 | static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, |
378 | unsigned long ip, unsigned long sym_flags) | |
f0868d1e SR |
379 | { |
380 | struct file *file = NULL; | |
381 | unsigned long vmstart = 0; | |
382 | int ret = 1; | |
383 | ||
d184b31c JB |
384 | if (s->full) |
385 | return 0; | |
386 | ||
f0868d1e SR |
387 | if (mm) { |
388 | const struct vm_area_struct *vma; | |
389 | ||
390 | down_read(&mm->mmap_sem); | |
391 | vma = find_vma(mm, ip); | |
392 | if (vma) { | |
393 | file = vma->vm_file; | |
394 | vmstart = vma->vm_start; | |
395 | } | |
396 | if (file) { | |
397 | ret = trace_seq_path(s, &file->f_path); | |
398 | if (ret) | |
19a7fe20 SRRH |
399 | trace_seq_printf(s, "[+0x%lx]", |
400 | ip - vmstart); | |
f0868d1e SR |
401 | } |
402 | up_read(&mm->mmap_sem); | |
403 | } | |
404 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
19a7fe20 SRRH |
405 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
406 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
407 | } |
408 | ||
f0868d1e SR |
409 | int |
410 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
411 | { | |
19a7fe20 SRRH |
412 | if (!ip) { |
413 | trace_seq_putc(s, '0'); | |
414 | goto out; | |
415 | } | |
f0868d1e SR |
416 | |
417 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
19a7fe20 | 418 | seq_print_sym_offset(s, "%s", ip); |
f0868d1e | 419 | else |
19a7fe20 | 420 | seq_print_sym_short(s, "%s", ip); |
f0868d1e SR |
421 | |
422 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
19a7fe20 SRRH |
423 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
424 | ||
425 | out: | |
426 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
427 | } |
428 | ||
f81c972d SR |
429 | /** |
430 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
431 | * @s: trace seq struct to write to | |
432 | * @entry: The trace entry field from the ring buffer | |
433 | * | |
434 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 435 | * count. |
f81c972d SR |
436 | */ |
437 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 438 | { |
10da37a6 DS |
439 | char hardsoft_irq; |
440 | char need_resched; | |
441 | char irqs_off; | |
442 | int hardirq; | |
443 | int softirq; | |
7e6867bf | 444 | int nmi; |
c4a8e8be | 445 | |
7e6867bf | 446 | nmi = entry->flags & TRACE_FLAG_NMI; |
c4a8e8be FW |
447 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
448 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 449 | |
10da37a6 DS |
450 | irqs_off = |
451 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
452 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
453 | '.'; | |
e5137b50 PZ |
454 | |
455 | switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | | |
456 | TRACE_FLAG_PREEMPT_RESCHED)) { | |
457 | case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: | |
458 | need_resched = 'N'; | |
459 | break; | |
460 | case TRACE_FLAG_NEED_RESCHED: | |
461 | need_resched = 'n'; | |
462 | break; | |
463 | case TRACE_FLAG_PREEMPT_RESCHED: | |
464 | need_resched = 'p'; | |
465 | break; | |
466 | default: | |
467 | need_resched = '.'; | |
468 | break; | |
469 | } | |
470 | ||
10da37a6 | 471 | hardsoft_irq = |
7e6867bf PZ |
472 | (nmi && hardirq) ? 'Z' : |
473 | nmi ? 'z' : | |
10da37a6 | 474 | (hardirq && softirq) ? 'H' : |
7e6867bf PZ |
475 | hardirq ? 'h' : |
476 | softirq ? 's' : | |
477 | '.' ; | |
10da37a6 | 478 | |
19a7fe20 SRRH |
479 | trace_seq_printf(s, "%c%c%c", |
480 | irqs_off, need_resched, hardsoft_irq); | |
c4a8e8be | 481 | |
829b876d | 482 | if (entry->preempt_count) |
19a7fe20 | 483 | trace_seq_printf(s, "%x", entry->preempt_count); |
637e7e86 | 484 | else |
19a7fe20 | 485 | trace_seq_putc(s, '.'); |
829b876d | 486 | |
19a7fe20 | 487 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
488 | } |
489 | ||
f81c972d SR |
490 | static int |
491 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
492 | { | |
493 | char comm[TASK_COMM_LEN]; | |
494 | ||
495 | trace_find_cmdline(entry->pid, comm); | |
496 | ||
19a7fe20 SRRH |
497 | trace_seq_printf(s, "%8.8s-%-5d %3d", |
498 | comm, entry->pid, cpu); | |
f81c972d SR |
499 | |
500 | return trace_print_lat_fmt(s, entry); | |
501 | } | |
502 | ||
8e1e1df2 BP |
503 | #undef MARK |
504 | #define MARK(v, s) {.val = v, .sym = s} | |
505 | /* trace overhead mark */ | |
506 | static const struct trace_mark { | |
507 | unsigned long long val; /* unit: nsec */ | |
508 | char sym; | |
509 | } mark[] = { | |
510 | MARK(1000000000ULL , '$'), /* 1 sec */ | |
b838e1d9 JL |
511 | MARK(100000000ULL , '@'), /* 100 msec */ |
512 | MARK(10000000ULL , '*'), /* 10 msec */ | |
8e1e1df2 BP |
513 | MARK(1000000ULL , '#'), /* 1000 usecs */ |
514 | MARK(100000ULL , '!'), /* 100 usecs */ | |
515 | MARK(10000ULL , '+'), /* 10 usecs */ | |
516 | }; | |
517 | #undef MARK | |
518 | ||
519 | char trace_find_mark(unsigned long long d) | |
520 | { | |
521 | int i; | |
522 | int size = ARRAY_SIZE(mark); | |
523 | ||
524 | for (i = 0; i < size; i++) { | |
b838e1d9 | 525 | if (d > mark[i].val) |
8e1e1df2 BP |
526 | break; |
527 | } | |
528 | ||
529 | return (i == size) ? ' ' : mark[i].sym; | |
530 | } | |
c4a8e8be | 531 | |
d9793bd8 | 532 | static int |
8be0709f | 533 | lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
c4a8e8be | 534 | { |
983f938a SRRH |
535 | struct trace_array *tr = iter->tr; |
536 | unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE; | |
8be0709f | 537 | unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; |
12883efb | 538 | unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start; |
8be0709f DS |
539 | unsigned long long rel_ts = next_ts - iter->ts; |
540 | struct trace_seq *s = &iter->seq; | |
541 | ||
542 | if (in_ns) { | |
543 | abs_ts = ns2usecs(abs_ts); | |
544 | rel_ts = ns2usecs(rel_ts); | |
545 | } | |
546 | ||
547 | if (verbose && in_ns) { | |
548 | unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); | |
549 | unsigned long abs_msec = (unsigned long)abs_ts; | |
550 | unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); | |
551 | unsigned long rel_msec = (unsigned long)rel_ts; | |
552 | ||
19a7fe20 SRRH |
553 | trace_seq_printf( |
554 | s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", | |
555 | ns2usecs(iter->ts), | |
556 | abs_msec, abs_usec, | |
557 | rel_msec, rel_usec); | |
558 | ||
8be0709f | 559 | } else if (verbose && !in_ns) { |
19a7fe20 SRRH |
560 | trace_seq_printf( |
561 | s, "[%016llx] %lld (+%lld): ", | |
562 | iter->ts, abs_ts, rel_ts); | |
563 | ||
8be0709f | 564 | } else if (!verbose && in_ns) { |
19a7fe20 SRRH |
565 | trace_seq_printf( |
566 | s, " %4lldus%c: ", | |
567 | abs_ts, | |
8e1e1df2 | 568 | trace_find_mark(rel_ts * NSEC_PER_USEC)); |
19a7fe20 | 569 | |
8be0709f | 570 | } else { /* !verbose && !in_ns */ |
19a7fe20 | 571 | trace_seq_printf(s, " %4lld: ", abs_ts); |
8be0709f | 572 | } |
19a7fe20 SRRH |
573 | |
574 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
575 | } |
576 | ||
577 | int trace_print_context(struct trace_iterator *iter) | |
578 | { | |
983f938a | 579 | struct trace_array *tr = iter->tr; |
c4a8e8be FW |
580 | struct trace_seq *s = &iter->seq; |
581 | struct trace_entry *entry = iter->ent; | |
8be0709f DS |
582 | unsigned long long t; |
583 | unsigned long secs, usec_rem; | |
4ca53085 SR |
584 | char comm[TASK_COMM_LEN]; |
585 | ||
586 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 587 | |
19a7fe20 | 588 | trace_seq_printf(s, "%16s-%-5d [%03d] ", |
77271ce4 | 589 | comm, entry->pid, iter->cpu); |
77271ce4 | 590 | |
983f938a | 591 | if (tr->trace_flags & TRACE_ITER_IRQ_INFO) |
19a7fe20 | 592 | trace_print_lat_fmt(s, entry); |
77271ce4 | 593 | |
8be0709f DS |
594 | if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { |
595 | t = ns2usecs(iter->ts); | |
596 | usec_rem = do_div(t, USEC_PER_SEC); | |
597 | secs = (unsigned long)t; | |
19a7fe20 | 598 | trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); |
8be0709f | 599 | } else |
19a7fe20 SRRH |
600 | trace_seq_printf(s, " %12llu: ", iter->ts); |
601 | ||
602 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
603 | } |
604 | ||
605 | int trace_print_lat_context(struct trace_iterator *iter) | |
606 | { | |
983f938a | 607 | struct trace_array *tr = iter->tr; |
db4c75cb SR |
608 | /* trace_find_next_entry will reset ent_size */ |
609 | int ent_size = iter->ent_size; | |
c4a8e8be | 610 | struct trace_seq *s = &iter->seq; |
983f938a | 611 | u64 next_ts; |
c4a8e8be FW |
612 | struct trace_entry *entry = iter->ent, |
613 | *next_entry = trace_find_next_entry(iter, NULL, | |
614 | &next_ts); | |
983f938a | 615 | unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE); |
c4a8e8be | 616 | |
db4c75cb SR |
617 | /* Restore the original ent_size */ |
618 | iter->ent_size = ent_size; | |
619 | ||
c4a8e8be FW |
620 | if (!next_entry) |
621 | next_ts = iter->ts; | |
c4a8e8be FW |
622 | |
623 | if (verbose) { | |
4ca53085 SR |
624 | char comm[TASK_COMM_LEN]; |
625 | ||
626 | trace_find_cmdline(entry->pid, comm); | |
627 | ||
19a7fe20 SRRH |
628 | trace_seq_printf( |
629 | s, "%16s %5d %3d %d %08x %08lx ", | |
630 | comm, entry->pid, iter->cpu, entry->flags, | |
631 | entry->preempt_count, iter->idx); | |
c4a8e8be | 632 | } else { |
19a7fe20 | 633 | lat_print_generic(s, entry, iter->cpu); |
c4a8e8be FW |
634 | } |
635 | ||
19a7fe20 | 636 | lat_print_timestamp(iter, next_ts); |
8be0709f | 637 | |
19a7fe20 | 638 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
639 | } |
640 | ||
f633cef0 SR |
641 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
642 | ||
643 | static int task_state_char(unsigned long state) | |
644 | { | |
645 | int bit = state ? __ffs(state) + 1 : 0; | |
646 | ||
647 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
648 | } | |
649 | ||
f0868d1e SR |
650 | /** |
651 | * ftrace_find_event - find a registered event | |
652 | * @type: the type of event to look for | |
653 | * | |
654 | * Returns an event of type @type otherwise NULL | |
4f535968 | 655 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
656 | */ |
657 | struct trace_event *ftrace_find_event(int type) | |
658 | { | |
659 | struct trace_event *event; | |
f0868d1e SR |
660 | unsigned key; |
661 | ||
662 | key = type & (EVENT_HASHSIZE - 1); | |
663 | ||
b67bfe0d | 664 | hlist_for_each_entry(event, &event_hash[key], node) { |
f0868d1e SR |
665 | if (event->type == type) |
666 | return event; | |
667 | } | |
668 | ||
669 | return NULL; | |
670 | } | |
671 | ||
060fa5c8 SR |
672 | static LIST_HEAD(ftrace_event_list); |
673 | ||
674 | static int trace_search_list(struct list_head **list) | |
675 | { | |
676 | struct trace_event *e; | |
677 | int last = __TRACE_LAST_TYPE; | |
678 | ||
679 | if (list_empty(&ftrace_event_list)) { | |
680 | *list = &ftrace_event_list; | |
681 | return last + 1; | |
682 | } | |
683 | ||
684 | /* | |
685 | * We used up all possible max events, | |
686 | * lets see if somebody freed one. | |
687 | */ | |
688 | list_for_each_entry(e, &ftrace_event_list, list) { | |
689 | if (e->type != last + 1) | |
690 | break; | |
691 | last++; | |
692 | } | |
693 | ||
694 | /* Did we used up all 65 thousand events??? */ | |
609a7404 | 695 | if ((last + 1) > TRACE_EVENT_TYPE_MAX) |
060fa5c8 SR |
696 | return 0; |
697 | ||
698 | *list = &e->list; | |
699 | return last + 1; | |
700 | } | |
701 | ||
4f535968 LJ |
702 | void trace_event_read_lock(void) |
703 | { | |
52f6ad6d | 704 | down_read(&trace_event_sem); |
4f535968 LJ |
705 | } |
706 | ||
707 | void trace_event_read_unlock(void) | |
708 | { | |
52f6ad6d | 709 | up_read(&trace_event_sem); |
4f535968 LJ |
710 | } |
711 | ||
f0868d1e | 712 | /** |
9023c930 | 713 | * register_trace_event - register output for an event type |
f0868d1e SR |
714 | * @event: the event type to register |
715 | * | |
716 | * Event types are stored in a hash and this hash is used to | |
717 | * find a way to print an event. If the @event->type is set | |
718 | * then it will use that type, otherwise it will assign a | |
719 | * type to use. | |
720 | * | |
721 | * If you assign your own type, please make sure it is added | |
722 | * to the trace_type enum in trace.h, to avoid collisions | |
723 | * with the dynamic types. | |
724 | * | |
725 | * Returns the event type number or zero on error. | |
726 | */ | |
9023c930 | 727 | int register_trace_event(struct trace_event *event) |
f0868d1e SR |
728 | { |
729 | unsigned key; | |
730 | int ret = 0; | |
731 | ||
52f6ad6d | 732 | down_write(&trace_event_sem); |
f0868d1e | 733 | |
060fa5c8 | 734 | if (WARN_ON(!event)) |
28bea271 | 735 | goto out; |
28bea271 | 736 | |
a9a57763 SR |
737 | if (WARN_ON(!event->funcs)) |
738 | goto out; | |
739 | ||
060fa5c8 SR |
740 | INIT_LIST_HEAD(&event->list); |
741 | ||
742 | if (!event->type) { | |
48dd0fed | 743 | struct list_head *list = NULL; |
060fa5c8 | 744 | |
609a7404 | 745 | if (next_event_type > TRACE_EVENT_TYPE_MAX) { |
060fa5c8 SR |
746 | |
747 | event->type = trace_search_list(&list); | |
748 | if (!event->type) | |
749 | goto out; | |
750 | ||
751 | } else { | |
8e1e1df2 | 752 | |
060fa5c8 SR |
753 | event->type = next_event_type++; |
754 | list = &ftrace_event_list; | |
755 | } | |
756 | ||
757 | if (WARN_ON(ftrace_find_event(event->type))) | |
758 | goto out; | |
759 | ||
760 | list_add_tail(&event->list, list); | |
761 | ||
762 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
763 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
764 | WARN_ON(1); | |
f0868d1e | 765 | goto out; |
060fa5c8 SR |
766 | } else { |
767 | /* Is this event already used */ | |
768 | if (ftrace_find_event(event->type)) | |
769 | goto out; | |
770 | } | |
f0868d1e | 771 | |
a9a57763 SR |
772 | if (event->funcs->trace == NULL) |
773 | event->funcs->trace = trace_nop_print; | |
774 | if (event->funcs->raw == NULL) | |
775 | event->funcs->raw = trace_nop_print; | |
776 | if (event->funcs->hex == NULL) | |
777 | event->funcs->hex = trace_nop_print; | |
778 | if (event->funcs->binary == NULL) | |
779 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 780 | |
f0868d1e SR |
781 | key = event->type & (EVENT_HASHSIZE - 1); |
782 | ||
4f535968 | 783 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
784 | |
785 | ret = event->type; | |
786 | out: | |
52f6ad6d | 787 | up_write(&trace_event_sem); |
f0868d1e SR |
788 | |
789 | return ret; | |
790 | } | |
9023c930 | 791 | EXPORT_SYMBOL_GPL(register_trace_event); |
f0868d1e | 792 | |
110bf2b7 | 793 | /* |
52f6ad6d | 794 | * Used by module code with the trace_event_sem held for write. |
110bf2b7 | 795 | */ |
9023c930 | 796 | int __unregister_trace_event(struct trace_event *event) |
110bf2b7 SR |
797 | { |
798 | hlist_del(&event->node); | |
799 | list_del(&event->list); | |
800 | return 0; | |
801 | } | |
802 | ||
f0868d1e | 803 | /** |
9023c930 | 804 | * unregister_trace_event - remove a no longer used event |
f0868d1e SR |
805 | * @event: the event to remove |
806 | */ | |
9023c930 | 807 | int unregister_trace_event(struct trace_event *event) |
f0868d1e | 808 | { |
52f6ad6d | 809 | down_write(&trace_event_sem); |
9023c930 | 810 | __unregister_trace_event(event); |
52f6ad6d | 811 | up_write(&trace_event_sem); |
f0868d1e SR |
812 | |
813 | return 0; | |
814 | } | |
9023c930 | 815 | EXPORT_SYMBOL_GPL(unregister_trace_event); |
f633cef0 SR |
816 | |
817 | /* | |
818 | * Standard events | |
819 | */ | |
820 | ||
a9a57763 SR |
821 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
822 | struct trace_event *event) | |
f633cef0 | 823 | { |
19a7fe20 | 824 | trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type); |
ee5e51f5 | 825 | |
19a7fe20 | 826 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
827 | } |
828 | ||
829 | /* TRACE_FN */ | |
a9a57763 SR |
830 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
831 | struct trace_event *event) | |
f633cef0 SR |
832 | { |
833 | struct ftrace_entry *field; | |
2c9b238e | 834 | struct trace_seq *s = &iter->seq; |
f633cef0 | 835 | |
2c9b238e | 836 | trace_assign_type(field, iter->ent); |
f633cef0 | 837 | |
19a7fe20 | 838 | seq_print_ip_sym(s, field->ip, flags); |
f633cef0 SR |
839 | |
840 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
19a7fe20 SRRH |
841 | trace_seq_puts(s, " <-"); |
842 | seq_print_ip_sym(s, field->parent_ip, flags); | |
f633cef0 | 843 | } |
f633cef0 | 844 | |
19a7fe20 | 845 | trace_seq_putc(s, '\n'); |
f633cef0 | 846 | |
19a7fe20 | 847 | return trace_handle_return(s); |
f633cef0 SR |
848 | } |
849 | ||
a9a57763 SR |
850 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
851 | struct trace_event *event) | |
f633cef0 SR |
852 | { |
853 | struct ftrace_entry *field; | |
854 | ||
2c9b238e | 855 | trace_assign_type(field, iter->ent); |
f633cef0 | 856 | |
19a7fe20 SRRH |
857 | trace_seq_printf(&iter->seq, "%lx %lx\n", |
858 | field->ip, | |
859 | field->parent_ip); | |
f633cef0 | 860 | |
19a7fe20 | 861 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
862 | } |
863 | ||
a9a57763 SR |
864 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
865 | struct trace_event *event) | |
f633cef0 SR |
866 | { |
867 | struct ftrace_entry *field; | |
2c9b238e | 868 | struct trace_seq *s = &iter->seq; |
f633cef0 | 869 | |
2c9b238e | 870 | trace_assign_type(field, iter->ent); |
f633cef0 | 871 | |
19a7fe20 SRRH |
872 | SEQ_PUT_HEX_FIELD(s, field->ip); |
873 | SEQ_PUT_HEX_FIELD(s, field->parent_ip); | |
f633cef0 | 874 | |
19a7fe20 | 875 | return trace_handle_return(s); |
f633cef0 SR |
876 | } |
877 | ||
a9a57763 SR |
878 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
879 | struct trace_event *event) | |
f633cef0 SR |
880 | { |
881 | struct ftrace_entry *field; | |
2c9b238e | 882 | struct trace_seq *s = &iter->seq; |
f633cef0 | 883 | |
2c9b238e | 884 | trace_assign_type(field, iter->ent); |
f633cef0 | 885 | |
19a7fe20 SRRH |
886 | SEQ_PUT_FIELD(s, field->ip); |
887 | SEQ_PUT_FIELD(s, field->parent_ip); | |
f633cef0 | 888 | |
19a7fe20 | 889 | return trace_handle_return(s); |
f633cef0 SR |
890 | } |
891 | ||
a9a57763 | 892 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 893 | .trace = trace_fn_trace, |
f633cef0 SR |
894 | .raw = trace_fn_raw, |
895 | .hex = trace_fn_hex, | |
896 | .binary = trace_fn_bin, | |
897 | }; | |
898 | ||
a9a57763 SR |
899 | static struct trace_event trace_fn_event = { |
900 | .type = TRACE_FN, | |
901 | .funcs = &trace_fn_funcs, | |
902 | }; | |
903 | ||
f633cef0 | 904 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
905 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
906 | char *delim) | |
f633cef0 SR |
907 | { |
908 | struct ctx_switch_entry *field; | |
4ca53085 | 909 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
910 | int S, T; |
911 | ||
4ca53085 | 912 | |
2c9b238e | 913 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
914 | |
915 | T = task_state_char(field->next_state); | |
916 | S = task_state_char(field->prev_state); | |
4ca53085 | 917 | trace_find_cmdline(field->next_pid, comm); |
19a7fe20 SRRH |
918 | trace_seq_printf(&iter->seq, |
919 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
920 | field->prev_pid, | |
921 | field->prev_prio, | |
922 | S, delim, | |
923 | field->next_cpu, | |
924 | field->next_pid, | |
925 | field->next_prio, | |
926 | T, comm); | |
927 | ||
928 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
929 | } |
930 | ||
a9a57763 SR |
931 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
932 | struct trace_event *event) | |
f633cef0 | 933 | { |
2c9b238e | 934 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
935 | } |
936 | ||
ae7462b4 | 937 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 938 | int flags, struct trace_event *event) |
f633cef0 | 939 | { |
2c9b238e | 940 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
941 | } |
942 | ||
2c9b238e | 943 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
944 | { |
945 | struct ctx_switch_entry *field; | |
946 | int T; | |
947 | ||
2c9b238e | 948 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
949 | |
950 | if (!S) | |
b0f56f1a | 951 | S = task_state_char(field->prev_state); |
f633cef0 | 952 | T = task_state_char(field->next_state); |
19a7fe20 SRRH |
953 | trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
954 | field->prev_pid, | |
955 | field->prev_prio, | |
956 | S, | |
957 | field->next_cpu, | |
958 | field->next_pid, | |
959 | field->next_prio, | |
960 | T); | |
961 | ||
962 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
963 | } |
964 | ||
a9a57763 SR |
965 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
966 | struct trace_event *event) | |
f633cef0 | 967 | { |
2c9b238e | 968 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
969 | } |
970 | ||
a9a57763 SR |
971 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
972 | struct trace_event *event) | |
f633cef0 | 973 | { |
2c9b238e | 974 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
975 | } |
976 | ||
977 | ||
2c9b238e | 978 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
979 | { |
980 | struct ctx_switch_entry *field; | |
2c9b238e | 981 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
982 | int T; |
983 | ||
2c9b238e | 984 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
985 | |
986 | if (!S) | |
b0f56f1a | 987 | S = task_state_char(field->prev_state); |
f633cef0 SR |
988 | T = task_state_char(field->next_state); |
989 | ||
19a7fe20 SRRH |
990 | SEQ_PUT_HEX_FIELD(s, field->prev_pid); |
991 | SEQ_PUT_HEX_FIELD(s, field->prev_prio); | |
992 | SEQ_PUT_HEX_FIELD(s, S); | |
993 | SEQ_PUT_HEX_FIELD(s, field->next_cpu); | |
994 | SEQ_PUT_HEX_FIELD(s, field->next_pid); | |
995 | SEQ_PUT_HEX_FIELD(s, field->next_prio); | |
996 | SEQ_PUT_HEX_FIELD(s, T); | |
f633cef0 | 997 | |
19a7fe20 | 998 | return trace_handle_return(s); |
f633cef0 SR |
999 | } |
1000 | ||
a9a57763 SR |
1001 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1002 | struct trace_event *event) | |
f633cef0 | 1003 | { |
2c9b238e | 1004 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1005 | } |
1006 | ||
a9a57763 SR |
1007 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1008 | struct trace_event *event) | |
f633cef0 | 1009 | { |
2c9b238e | 1010 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1011 | } |
1012 | ||
ae7462b4 | 1013 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1014 | int flags, struct trace_event *event) |
f633cef0 SR |
1015 | { |
1016 | struct ctx_switch_entry *field; | |
2c9b238e | 1017 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1018 | |
2c9b238e | 1019 | trace_assign_type(field, iter->ent); |
f633cef0 | 1020 | |
19a7fe20 SRRH |
1021 | SEQ_PUT_FIELD(s, field->prev_pid); |
1022 | SEQ_PUT_FIELD(s, field->prev_prio); | |
1023 | SEQ_PUT_FIELD(s, field->prev_state); | |
1024 | SEQ_PUT_FIELD(s, field->next_cpu); | |
1025 | SEQ_PUT_FIELD(s, field->next_pid); | |
1026 | SEQ_PUT_FIELD(s, field->next_prio); | |
1027 | SEQ_PUT_FIELD(s, field->next_state); | |
f633cef0 | 1028 | |
19a7fe20 | 1029 | return trace_handle_return(s); |
f633cef0 SR |
1030 | } |
1031 | ||
a9a57763 | 1032 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1033 | .trace = trace_ctx_print, |
f633cef0 SR |
1034 | .raw = trace_ctx_raw, |
1035 | .hex = trace_ctx_hex, | |
1036 | .binary = trace_ctxwake_bin, | |
1037 | }; | |
1038 | ||
a9a57763 SR |
1039 | static struct trace_event trace_ctx_event = { |
1040 | .type = TRACE_CTX, | |
1041 | .funcs = &trace_ctx_funcs, | |
1042 | }; | |
1043 | ||
1044 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1045 | .trace = trace_wake_print, |
f633cef0 SR |
1046 | .raw = trace_wake_raw, |
1047 | .hex = trace_wake_hex, | |
1048 | .binary = trace_ctxwake_bin, | |
1049 | }; | |
1050 | ||
a9a57763 SR |
1051 | static struct trace_event trace_wake_event = { |
1052 | .type = TRACE_WAKE, | |
1053 | .funcs = &trace_wake_funcs, | |
1054 | }; | |
1055 | ||
f633cef0 SR |
1056 | /* TRACE_STACK */ |
1057 | ||
ae7462b4 | 1058 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1059 | int flags, struct trace_event *event) |
f633cef0 SR |
1060 | { |
1061 | struct stack_entry *field; | |
2c9b238e | 1062 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1063 | unsigned long *p; |
1064 | unsigned long *end; | |
f633cef0 | 1065 | |
2c9b238e | 1066 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1067 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1068 | |
19a7fe20 | 1069 | trace_seq_puts(s, "<stack trace>\n"); |
4a9bd3f1 SR |
1070 | |
1071 | for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { | |
f633cef0 | 1072 | |
19a7fe20 SRRH |
1073 | if (trace_seq_has_overflowed(s)) |
1074 | break; | |
f633cef0 | 1075 | |
19a7fe20 SRRH |
1076 | trace_seq_puts(s, " => "); |
1077 | seq_print_ip_sym(s, *p, flags); | |
1078 | trace_seq_putc(s, '\n'); | |
1079 | } | |
f633cef0 | 1080 | |
19a7fe20 | 1081 | return trace_handle_return(s); |
f633cef0 SR |
1082 | } |
1083 | ||
a9a57763 | 1084 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1085 | .trace = trace_stack_print, |
f633cef0 SR |
1086 | }; |
1087 | ||
a9a57763 SR |
1088 | static struct trace_event trace_stack_event = { |
1089 | .type = TRACE_STACK, | |
1090 | .funcs = &trace_stack_funcs, | |
1091 | }; | |
1092 | ||
f633cef0 | 1093 | /* TRACE_USER_STACK */ |
ae7462b4 | 1094 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1095 | int flags, struct trace_event *event) |
f633cef0 | 1096 | { |
983f938a | 1097 | struct trace_array *tr = iter->tr; |
f633cef0 | 1098 | struct userstack_entry *field; |
2c9b238e | 1099 | struct trace_seq *s = &iter->seq; |
6b1032d5 SRRH |
1100 | struct mm_struct *mm = NULL; |
1101 | unsigned int i; | |
f633cef0 | 1102 | |
2c9b238e | 1103 | trace_assign_type(field, iter->ent); |
f633cef0 | 1104 | |
19a7fe20 | 1105 | trace_seq_puts(s, "<user stack trace>\n"); |
6b1032d5 | 1106 | |
983f938a | 1107 | if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) { |
6b1032d5 SRRH |
1108 | struct task_struct *task; |
1109 | /* | |
1110 | * we do the lookup on the thread group leader, | |
1111 | * since individual threads might have already quit! | |
1112 | */ | |
1113 | rcu_read_lock(); | |
1114 | task = find_task_by_vpid(field->tgid); | |
1115 | if (task) | |
1116 | mm = get_task_mm(task); | |
1117 | rcu_read_unlock(); | |
1118 | } | |
1119 | ||
1120 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
1121 | unsigned long ip = field->caller[i]; | |
1122 | ||
1123 | if (ip == ULONG_MAX || trace_seq_has_overflowed(s)) | |
1124 | break; | |
1125 | ||
1126 | trace_seq_puts(s, " => "); | |
1127 | ||
1128 | if (!ip) { | |
1129 | trace_seq_puts(s, "??"); | |
1130 | trace_seq_putc(s, '\n'); | |
1131 | continue; | |
1132 | } | |
1133 | ||
1134 | seq_print_user_ip(s, mm, ip, flags); | |
1135 | trace_seq_putc(s, '\n'); | |
1136 | } | |
1137 | ||
1138 | if (mm) | |
1139 | mmput(mm); | |
f633cef0 | 1140 | |
19a7fe20 | 1141 | return trace_handle_return(s); |
f633cef0 SR |
1142 | } |
1143 | ||
a9a57763 | 1144 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1145 | .trace = trace_user_stack_print, |
f633cef0 SR |
1146 | }; |
1147 | ||
a9a57763 SR |
1148 | static struct trace_event trace_user_stack_event = { |
1149 | .type = TRACE_USER_STACK, | |
1150 | .funcs = &trace_user_stack_funcs, | |
1151 | }; | |
1152 | ||
e7c15cd8 SRRH |
1153 | /* TRACE_HWLAT */ |
1154 | static enum print_line_t | |
1155 | trace_hwlat_print(struct trace_iterator *iter, int flags, | |
1156 | struct trace_event *event) | |
1157 | { | |
1158 | struct trace_entry *entry = iter->ent; | |
1159 | struct trace_seq *s = &iter->seq; | |
1160 | struct hwlat_entry *field; | |
1161 | ||
1162 | trace_assign_type(field, entry); | |
1163 | ||
7b2c8625 | 1164 | trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%ld.%09ld", |
e7c15cd8 SRRH |
1165 | field->seqnum, |
1166 | field->duration, | |
1167 | field->outer_duration, | |
1168 | field->timestamp.tv_sec, | |
1169 | field->timestamp.tv_nsec); | |
1170 | ||
7b2c8625 SRRH |
1171 | if (field->nmi_count) { |
1172 | /* | |
1173 | * The generic sched_clock() is not NMI safe, thus | |
1174 | * we only record the count and not the time. | |
1175 | */ | |
1176 | if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK)) | |
1177 | trace_seq_printf(s, " nmi-total:%llu", | |
1178 | field->nmi_total_ts); | |
1179 | trace_seq_printf(s, " nmi-count:%u", | |
1180 | field->nmi_count); | |
1181 | } | |
1182 | ||
1183 | trace_seq_putc(s, '\n'); | |
1184 | ||
e7c15cd8 SRRH |
1185 | return trace_handle_return(s); |
1186 | } | |
1187 | ||
1188 | ||
1189 | static enum print_line_t | |
1190 | trace_hwlat_raw(struct trace_iterator *iter, int flags, | |
1191 | struct trace_event *event) | |
1192 | { | |
1193 | struct hwlat_entry *field; | |
1194 | struct trace_seq *s = &iter->seq; | |
1195 | ||
1196 | trace_assign_type(field, iter->ent); | |
1197 | ||
1198 | trace_seq_printf(s, "%llu %lld %ld %09ld %u\n", | |
1199 | field->duration, | |
1200 | field->outer_duration, | |
1201 | field->timestamp.tv_sec, | |
1202 | field->timestamp.tv_nsec, | |
1203 | field->seqnum); | |
1204 | ||
1205 | return trace_handle_return(s); | |
1206 | } | |
1207 | ||
1208 | static struct trace_event_functions trace_hwlat_funcs = { | |
1209 | .trace = trace_hwlat_print, | |
1210 | .raw = trace_hwlat_raw, | |
1211 | }; | |
1212 | ||
1213 | static struct trace_event trace_hwlat_event = { | |
1214 | .type = TRACE_HWLAT, | |
1215 | .funcs = &trace_hwlat_funcs, | |
1216 | }; | |
1217 | ||
09ae7234 SRRH |
1218 | /* TRACE_BPUTS */ |
1219 | static enum print_line_t | |
1220 | trace_bputs_print(struct trace_iterator *iter, int flags, | |
1221 | struct trace_event *event) | |
1222 | { | |
1223 | struct trace_entry *entry = iter->ent; | |
1224 | struct trace_seq *s = &iter->seq; | |
1225 | struct bputs_entry *field; | |
1226 | ||
1227 | trace_assign_type(field, entry); | |
1228 | ||
19a7fe20 SRRH |
1229 | seq_print_ip_sym(s, field->ip, flags); |
1230 | trace_seq_puts(s, ": "); | |
1231 | trace_seq_puts(s, field->str); | |
09ae7234 | 1232 | |
19a7fe20 | 1233 | return trace_handle_return(s); |
09ae7234 SRRH |
1234 | } |
1235 | ||
1236 | ||
1237 | static enum print_line_t | |
1238 | trace_bputs_raw(struct trace_iterator *iter, int flags, | |
1239 | struct trace_event *event) | |
1240 | { | |
1241 | struct bputs_entry *field; | |
1242 | struct trace_seq *s = &iter->seq; | |
1243 | ||
1244 | trace_assign_type(field, iter->ent); | |
1245 | ||
19a7fe20 SRRH |
1246 | trace_seq_printf(s, ": %lx : ", field->ip); |
1247 | trace_seq_puts(s, field->str); | |
09ae7234 | 1248 | |
19a7fe20 | 1249 | return trace_handle_return(s); |
09ae7234 SRRH |
1250 | } |
1251 | ||
1252 | static struct trace_event_functions trace_bputs_funcs = { | |
1253 | .trace = trace_bputs_print, | |
1254 | .raw = trace_bputs_raw, | |
1255 | }; | |
1256 | ||
1257 | static struct trace_event trace_bputs_event = { | |
1258 | .type = TRACE_BPUTS, | |
1259 | .funcs = &trace_bputs_funcs, | |
1260 | }; | |
1261 | ||
48ead020 | 1262 | /* TRACE_BPRINT */ |
1427cdf0 | 1263 | static enum print_line_t |
a9a57763 SR |
1264 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1265 | struct trace_event *event) | |
1427cdf0 LJ |
1266 | { |
1267 | struct trace_entry *entry = iter->ent; | |
1268 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1269 | struct bprint_entry *field; |
1427cdf0 LJ |
1270 | |
1271 | trace_assign_type(field, entry); | |
1272 | ||
19a7fe20 SRRH |
1273 | seq_print_ip_sym(s, field->ip, flags); |
1274 | trace_seq_puts(s, ": "); | |
1275 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1276 | |
19a7fe20 | 1277 | return trace_handle_return(s); |
1427cdf0 LJ |
1278 | } |
1279 | ||
769b0441 | 1280 | |
48ead020 | 1281 | static enum print_line_t |
a9a57763 SR |
1282 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1283 | struct trace_event *event) | |
1427cdf0 | 1284 | { |
48ead020 | 1285 | struct bprint_entry *field; |
1427cdf0 | 1286 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1287 | |
769b0441 | 1288 | trace_assign_type(field, iter->ent); |
1427cdf0 | 1289 | |
19a7fe20 SRRH |
1290 | trace_seq_printf(s, ": %lx : ", field->ip); |
1291 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1292 | |
19a7fe20 | 1293 | return trace_handle_return(s); |
1427cdf0 LJ |
1294 | } |
1295 | ||
a9a57763 SR |
1296 | static struct trace_event_functions trace_bprint_funcs = { |
1297 | .trace = trace_bprint_print, | |
1298 | .raw = trace_bprint_raw, | |
1299 | }; | |
769b0441 | 1300 | |
48ead020 FW |
1301 | static struct trace_event trace_bprint_event = { |
1302 | .type = TRACE_BPRINT, | |
a9a57763 | 1303 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1304 | }; |
1305 | ||
1306 | /* TRACE_PRINT */ | |
1307 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1308 | int flags, struct trace_event *event) |
48ead020 FW |
1309 | { |
1310 | struct print_entry *field; | |
1311 | struct trace_seq *s = &iter->seq; | |
1312 | ||
1313 | trace_assign_type(field, iter->ent); | |
1314 | ||
19a7fe20 SRRH |
1315 | seq_print_ip_sym(s, field->ip, flags); |
1316 | trace_seq_printf(s, ": %s", field->buf); | |
48ead020 | 1317 | |
19a7fe20 | 1318 | return trace_handle_return(s); |
48ead020 FW |
1319 | } |
1320 | ||
a9a57763 SR |
1321 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1322 | struct trace_event *event) | |
48ead020 FW |
1323 | { |
1324 | struct print_entry *field; | |
1325 | ||
1326 | trace_assign_type(field, iter->ent); | |
1327 | ||
19a7fe20 | 1328 | trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf); |
48ead020 | 1329 | |
19a7fe20 | 1330 | return trace_handle_return(&iter->seq); |
48ead020 FW |
1331 | } |
1332 | ||
a9a57763 | 1333 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1334 | .trace = trace_print_print, |
1335 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1336 | }; |
1337 | ||
a9a57763 SR |
1338 | static struct trace_event trace_print_event = { |
1339 | .type = TRACE_PRINT, | |
1340 | .funcs = &trace_print_funcs, | |
1341 | }; | |
1342 | ||
fa32e855 SR |
1343 | static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags, |
1344 | struct trace_event *event) | |
1345 | { | |
1346 | struct raw_data_entry *field; | |
1347 | int i; | |
1348 | ||
1349 | trace_assign_type(field, iter->ent); | |
1350 | ||
1351 | trace_seq_printf(&iter->seq, "# %x buf:", field->id); | |
1352 | ||
1353 | for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++) | |
1354 | trace_seq_printf(&iter->seq, " %02x", | |
1355 | (unsigned char)field->buf[i]); | |
1356 | ||
1357 | trace_seq_putc(&iter->seq, '\n'); | |
1358 | ||
1359 | return trace_handle_return(&iter->seq); | |
1360 | } | |
1361 | ||
1362 | static struct trace_event_functions trace_raw_data_funcs = { | |
1363 | .trace = trace_raw_data, | |
1364 | .raw = trace_raw_data, | |
1365 | }; | |
1366 | ||
1367 | static struct trace_event trace_raw_data_event = { | |
1368 | .type = TRACE_RAW_DATA, | |
1369 | .funcs = &trace_raw_data_funcs, | |
1370 | }; | |
1371 | ||
48ead020 | 1372 | |
f633cef0 SR |
1373 | static struct trace_event *events[] __initdata = { |
1374 | &trace_fn_event, | |
1375 | &trace_ctx_event, | |
1376 | &trace_wake_event, | |
f633cef0 SR |
1377 | &trace_stack_event, |
1378 | &trace_user_stack_event, | |
09ae7234 | 1379 | &trace_bputs_event, |
48ead020 | 1380 | &trace_bprint_event, |
f633cef0 | 1381 | &trace_print_event, |
e7c15cd8 | 1382 | &trace_hwlat_event, |
fa32e855 | 1383 | &trace_raw_data_event, |
f633cef0 SR |
1384 | NULL |
1385 | }; | |
1386 | ||
1387 | __init static int init_events(void) | |
1388 | { | |
1389 | struct trace_event *event; | |
1390 | int i, ret; | |
1391 | ||
1392 | for (i = 0; events[i]; i++) { | |
1393 | event = events[i]; | |
1394 | ||
9023c930 | 1395 | ret = register_trace_event(event); |
f633cef0 SR |
1396 | if (!ret) { |
1397 | printk(KERN_WARNING "event %d failed to register\n", | |
1398 | event->type); | |
1399 | WARN_ON_ONCE(1); | |
1400 | } | |
1401 | } | |
1402 | ||
1403 | return 0; | |
1404 | } | |
7374e827 | 1405 | early_initcall(init_events); |