Commit | Line | Data |
---|---|---|
bcea3f96 | 1 | // SPDX-License-Identifier: GPL-2.0 |
f0868d1e SR |
2 | /* |
3 | * trace_output.c | |
4 | * | |
5 | * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> | |
6 | * | |
7 | */ | |
f0868d1e SR |
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 | { | |
f0868d1e | 344 | char str[KSYM_SYMBOL_LEN]; |
feaf1283 | 345 | #ifdef CONFIG_KALLSYMS |
f0868d1e SR |
346 | const char *name; |
347 | ||
348 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
349 | ||
350 | name = kretprobed(str); | |
351 | ||
feaf1283 SRV |
352 | if (name && strlen(name)) { |
353 | trace_seq_printf(s, fmt, name); | |
354 | return; | |
355 | } | |
f0868d1e | 356 | #endif |
feaf1283 SRV |
357 | snprintf(str, KSYM_SYMBOL_LEN, "0x%08lx", address); |
358 | trace_seq_printf(s, fmt, str); | |
f0868d1e SR |
359 | } |
360 | ||
19a7fe20 | 361 | static void |
f0868d1e SR |
362 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, |
363 | unsigned long address) | |
364 | { | |
f0868d1e | 365 | char str[KSYM_SYMBOL_LEN]; |
feaf1283 | 366 | #ifdef CONFIG_KALLSYMS |
f0868d1e SR |
367 | const char *name; |
368 | ||
369 | sprint_symbol(str, address); | |
370 | name = kretprobed(str); | |
371 | ||
feaf1283 SRV |
372 | if (name && strlen(name)) { |
373 | trace_seq_printf(s, fmt, name); | |
374 | return; | |
375 | } | |
f0868d1e | 376 | #endif |
feaf1283 SRV |
377 | snprintf(str, KSYM_SYMBOL_LEN, "0x%08lx", address); |
378 | trace_seq_printf(s, fmt, str); | |
f0868d1e SR |
379 | } |
380 | ||
381 | #ifndef CONFIG_64BIT | |
382 | # define IP_FMT "%08lx" | |
383 | #else | |
384 | # define IP_FMT "%016lx" | |
385 | #endif | |
386 | ||
ef92480a SRRH |
387 | static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, |
388 | unsigned long ip, unsigned long sym_flags) | |
f0868d1e SR |
389 | { |
390 | struct file *file = NULL; | |
391 | unsigned long vmstart = 0; | |
392 | int ret = 1; | |
393 | ||
d184b31c JB |
394 | if (s->full) |
395 | return 0; | |
396 | ||
f0868d1e SR |
397 | if (mm) { |
398 | const struct vm_area_struct *vma; | |
399 | ||
400 | down_read(&mm->mmap_sem); | |
401 | vma = find_vma(mm, ip); | |
402 | if (vma) { | |
403 | file = vma->vm_file; | |
404 | vmstart = vma->vm_start; | |
405 | } | |
406 | if (file) { | |
407 | ret = trace_seq_path(s, &file->f_path); | |
408 | if (ret) | |
19a7fe20 SRRH |
409 | trace_seq_printf(s, "[+0x%lx]", |
410 | ip - vmstart); | |
f0868d1e SR |
411 | } |
412 | up_read(&mm->mmap_sem); | |
413 | } | |
414 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
19a7fe20 SRRH |
415 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
416 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
417 | } |
418 | ||
f0868d1e SR |
419 | int |
420 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
421 | { | |
19a7fe20 SRRH |
422 | if (!ip) { |
423 | trace_seq_putc(s, '0'); | |
424 | goto out; | |
425 | } | |
f0868d1e SR |
426 | |
427 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
19a7fe20 | 428 | seq_print_sym_offset(s, "%s", ip); |
f0868d1e | 429 | else |
19a7fe20 | 430 | seq_print_sym_short(s, "%s", ip); |
f0868d1e SR |
431 | |
432 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
19a7fe20 SRRH |
433 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
434 | ||
435 | out: | |
436 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
437 | } |
438 | ||
f81c972d SR |
439 | /** |
440 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
441 | * @s: trace seq struct to write to | |
442 | * @entry: The trace entry field from the ring buffer | |
443 | * | |
444 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 445 | * count. |
f81c972d SR |
446 | */ |
447 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 448 | { |
10da37a6 DS |
449 | char hardsoft_irq; |
450 | char need_resched; | |
451 | char irqs_off; | |
452 | int hardirq; | |
453 | int softirq; | |
7e6867bf | 454 | int nmi; |
c4a8e8be | 455 | |
7e6867bf | 456 | nmi = entry->flags & TRACE_FLAG_NMI; |
c4a8e8be FW |
457 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
458 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 459 | |
10da37a6 DS |
460 | irqs_off = |
461 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
462 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
463 | '.'; | |
e5137b50 PZ |
464 | |
465 | switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | | |
466 | TRACE_FLAG_PREEMPT_RESCHED)) { | |
467 | case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: | |
468 | need_resched = 'N'; | |
469 | break; | |
470 | case TRACE_FLAG_NEED_RESCHED: | |
471 | need_resched = 'n'; | |
472 | break; | |
473 | case TRACE_FLAG_PREEMPT_RESCHED: | |
474 | need_resched = 'p'; | |
475 | break; | |
476 | default: | |
477 | need_resched = '.'; | |
478 | break; | |
479 | } | |
480 | ||
10da37a6 | 481 | hardsoft_irq = |
7e6867bf PZ |
482 | (nmi && hardirq) ? 'Z' : |
483 | nmi ? 'z' : | |
10da37a6 | 484 | (hardirq && softirq) ? 'H' : |
7e6867bf PZ |
485 | hardirq ? 'h' : |
486 | softirq ? 's' : | |
487 | '.' ; | |
10da37a6 | 488 | |
19a7fe20 SRRH |
489 | trace_seq_printf(s, "%c%c%c", |
490 | irqs_off, need_resched, hardsoft_irq); | |
c4a8e8be | 491 | |
829b876d | 492 | if (entry->preempt_count) |
19a7fe20 | 493 | trace_seq_printf(s, "%x", entry->preempt_count); |
637e7e86 | 494 | else |
19a7fe20 | 495 | trace_seq_putc(s, '.'); |
829b876d | 496 | |
19a7fe20 | 497 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
498 | } |
499 | ||
f81c972d SR |
500 | static int |
501 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
502 | { | |
503 | char comm[TASK_COMM_LEN]; | |
504 | ||
505 | trace_find_cmdline(entry->pid, comm); | |
506 | ||
19a7fe20 SRRH |
507 | trace_seq_printf(s, "%8.8s-%-5d %3d", |
508 | comm, entry->pid, cpu); | |
f81c972d SR |
509 | |
510 | return trace_print_lat_fmt(s, entry); | |
511 | } | |
512 | ||
8e1e1df2 BP |
513 | #undef MARK |
514 | #define MARK(v, s) {.val = v, .sym = s} | |
515 | /* trace overhead mark */ | |
516 | static const struct trace_mark { | |
517 | unsigned long long val; /* unit: nsec */ | |
518 | char sym; | |
519 | } mark[] = { | |
520 | MARK(1000000000ULL , '$'), /* 1 sec */ | |
b838e1d9 JL |
521 | MARK(100000000ULL , '@'), /* 100 msec */ |
522 | MARK(10000000ULL , '*'), /* 10 msec */ | |
8e1e1df2 BP |
523 | MARK(1000000ULL , '#'), /* 1000 usecs */ |
524 | MARK(100000ULL , '!'), /* 100 usecs */ | |
525 | MARK(10000ULL , '+'), /* 10 usecs */ | |
526 | }; | |
527 | #undef MARK | |
528 | ||
529 | char trace_find_mark(unsigned long long d) | |
530 | { | |
531 | int i; | |
532 | int size = ARRAY_SIZE(mark); | |
533 | ||
534 | for (i = 0; i < size; i++) { | |
b838e1d9 | 535 | if (d > mark[i].val) |
8e1e1df2 BP |
536 | break; |
537 | } | |
538 | ||
539 | return (i == size) ? ' ' : mark[i].sym; | |
540 | } | |
c4a8e8be | 541 | |
d9793bd8 | 542 | static int |
8be0709f | 543 | lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
c4a8e8be | 544 | { |
983f938a SRRH |
545 | struct trace_array *tr = iter->tr; |
546 | unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE; | |
8be0709f | 547 | unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; |
12883efb | 548 | unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start; |
8be0709f DS |
549 | unsigned long long rel_ts = next_ts - iter->ts; |
550 | struct trace_seq *s = &iter->seq; | |
551 | ||
552 | if (in_ns) { | |
553 | abs_ts = ns2usecs(abs_ts); | |
554 | rel_ts = ns2usecs(rel_ts); | |
555 | } | |
556 | ||
557 | if (verbose && in_ns) { | |
558 | unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); | |
559 | unsigned long abs_msec = (unsigned long)abs_ts; | |
560 | unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); | |
561 | unsigned long rel_msec = (unsigned long)rel_ts; | |
562 | ||
19a7fe20 SRRH |
563 | trace_seq_printf( |
564 | s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", | |
565 | ns2usecs(iter->ts), | |
566 | abs_msec, abs_usec, | |
567 | rel_msec, rel_usec); | |
568 | ||
8be0709f | 569 | } else if (verbose && !in_ns) { |
19a7fe20 SRRH |
570 | trace_seq_printf( |
571 | s, "[%016llx] %lld (+%lld): ", | |
572 | iter->ts, abs_ts, rel_ts); | |
573 | ||
8be0709f | 574 | } else if (!verbose && in_ns) { |
19a7fe20 SRRH |
575 | trace_seq_printf( |
576 | s, " %4lldus%c: ", | |
577 | abs_ts, | |
8e1e1df2 | 578 | trace_find_mark(rel_ts * NSEC_PER_USEC)); |
19a7fe20 | 579 | |
8be0709f | 580 | } else { /* !verbose && !in_ns */ |
19a7fe20 | 581 | trace_seq_printf(s, " %4lld: ", abs_ts); |
8be0709f | 582 | } |
19a7fe20 SRRH |
583 | |
584 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
585 | } |
586 | ||
587 | int trace_print_context(struct trace_iterator *iter) | |
588 | { | |
983f938a | 589 | struct trace_array *tr = iter->tr; |
c4a8e8be FW |
590 | struct trace_seq *s = &iter->seq; |
591 | struct trace_entry *entry = iter->ent; | |
8be0709f DS |
592 | unsigned long long t; |
593 | unsigned long secs, usec_rem; | |
4ca53085 SR |
594 | char comm[TASK_COMM_LEN]; |
595 | ||
596 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 597 | |
f8494fa3 | 598 | trace_seq_printf(s, "%16s-%-5d ", comm, entry->pid); |
77271ce4 | 599 | |
441dae8f JF |
600 | if (tr->trace_flags & TRACE_ITER_RECORD_TGID) { |
601 | unsigned int tgid = trace_find_tgid(entry->pid); | |
602 | ||
603 | if (!tgid) | |
604 | trace_seq_printf(s, "(-----) "); | |
605 | else | |
606 | trace_seq_printf(s, "(%5d) ", tgid); | |
607 | } | |
608 | ||
f8494fa3 JFG |
609 | trace_seq_printf(s, "[%03d] ", iter->cpu); |
610 | ||
983f938a | 611 | if (tr->trace_flags & TRACE_ITER_IRQ_INFO) |
19a7fe20 | 612 | trace_print_lat_fmt(s, entry); |
77271ce4 | 613 | |
8be0709f DS |
614 | if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { |
615 | t = ns2usecs(iter->ts); | |
616 | usec_rem = do_div(t, USEC_PER_SEC); | |
617 | secs = (unsigned long)t; | |
19a7fe20 | 618 | trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); |
8be0709f | 619 | } else |
19a7fe20 SRRH |
620 | trace_seq_printf(s, " %12llu: ", iter->ts); |
621 | ||
622 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
623 | } |
624 | ||
625 | int trace_print_lat_context(struct trace_iterator *iter) | |
626 | { | |
983f938a | 627 | struct trace_array *tr = iter->tr; |
db4c75cb SR |
628 | /* trace_find_next_entry will reset ent_size */ |
629 | int ent_size = iter->ent_size; | |
c4a8e8be | 630 | struct trace_seq *s = &iter->seq; |
983f938a | 631 | u64 next_ts; |
c4a8e8be FW |
632 | struct trace_entry *entry = iter->ent, |
633 | *next_entry = trace_find_next_entry(iter, NULL, | |
634 | &next_ts); | |
983f938a | 635 | unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE); |
c4a8e8be | 636 | |
db4c75cb SR |
637 | /* Restore the original ent_size */ |
638 | iter->ent_size = ent_size; | |
639 | ||
c4a8e8be FW |
640 | if (!next_entry) |
641 | next_ts = iter->ts; | |
c4a8e8be FW |
642 | |
643 | if (verbose) { | |
4ca53085 SR |
644 | char comm[TASK_COMM_LEN]; |
645 | ||
646 | trace_find_cmdline(entry->pid, comm); | |
647 | ||
19a7fe20 SRRH |
648 | trace_seq_printf( |
649 | s, "%16s %5d %3d %d %08x %08lx ", | |
650 | comm, entry->pid, iter->cpu, entry->flags, | |
651 | entry->preempt_count, iter->idx); | |
c4a8e8be | 652 | } else { |
19a7fe20 | 653 | lat_print_generic(s, entry, iter->cpu); |
c4a8e8be FW |
654 | } |
655 | ||
19a7fe20 | 656 | lat_print_timestamp(iter, next_ts); |
8be0709f | 657 | |
19a7fe20 | 658 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
659 | } |
660 | ||
f0868d1e SR |
661 | /** |
662 | * ftrace_find_event - find a registered event | |
663 | * @type: the type of event to look for | |
664 | * | |
665 | * Returns an event of type @type otherwise NULL | |
4f535968 | 666 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
667 | */ |
668 | struct trace_event *ftrace_find_event(int type) | |
669 | { | |
670 | struct trace_event *event; | |
f0868d1e SR |
671 | unsigned key; |
672 | ||
673 | key = type & (EVENT_HASHSIZE - 1); | |
674 | ||
b67bfe0d | 675 | hlist_for_each_entry(event, &event_hash[key], node) { |
f0868d1e SR |
676 | if (event->type == type) |
677 | return event; | |
678 | } | |
679 | ||
680 | return NULL; | |
681 | } | |
682 | ||
060fa5c8 SR |
683 | static LIST_HEAD(ftrace_event_list); |
684 | ||
685 | static int trace_search_list(struct list_head **list) | |
686 | { | |
687 | struct trace_event *e; | |
688 | int last = __TRACE_LAST_TYPE; | |
689 | ||
690 | if (list_empty(&ftrace_event_list)) { | |
691 | *list = &ftrace_event_list; | |
692 | return last + 1; | |
693 | } | |
694 | ||
695 | /* | |
696 | * We used up all possible max events, | |
697 | * lets see if somebody freed one. | |
698 | */ | |
699 | list_for_each_entry(e, &ftrace_event_list, list) { | |
700 | if (e->type != last + 1) | |
701 | break; | |
702 | last++; | |
703 | } | |
704 | ||
705 | /* Did we used up all 65 thousand events??? */ | |
609a7404 | 706 | if ((last + 1) > TRACE_EVENT_TYPE_MAX) |
060fa5c8 SR |
707 | return 0; |
708 | ||
709 | *list = &e->list; | |
710 | return last + 1; | |
711 | } | |
712 | ||
4f535968 LJ |
713 | void trace_event_read_lock(void) |
714 | { | |
52f6ad6d | 715 | down_read(&trace_event_sem); |
4f535968 LJ |
716 | } |
717 | ||
718 | void trace_event_read_unlock(void) | |
719 | { | |
52f6ad6d | 720 | up_read(&trace_event_sem); |
4f535968 LJ |
721 | } |
722 | ||
f0868d1e | 723 | /** |
9023c930 | 724 | * register_trace_event - register output for an event type |
f0868d1e SR |
725 | * @event: the event type to register |
726 | * | |
727 | * Event types are stored in a hash and this hash is used to | |
728 | * find a way to print an event. If the @event->type is set | |
729 | * then it will use that type, otherwise it will assign a | |
730 | * type to use. | |
731 | * | |
732 | * If you assign your own type, please make sure it is added | |
733 | * to the trace_type enum in trace.h, to avoid collisions | |
734 | * with the dynamic types. | |
735 | * | |
736 | * Returns the event type number or zero on error. | |
737 | */ | |
9023c930 | 738 | int register_trace_event(struct trace_event *event) |
f0868d1e SR |
739 | { |
740 | unsigned key; | |
741 | int ret = 0; | |
742 | ||
52f6ad6d | 743 | down_write(&trace_event_sem); |
f0868d1e | 744 | |
060fa5c8 | 745 | if (WARN_ON(!event)) |
28bea271 | 746 | goto out; |
28bea271 | 747 | |
a9a57763 SR |
748 | if (WARN_ON(!event->funcs)) |
749 | goto out; | |
750 | ||
060fa5c8 SR |
751 | INIT_LIST_HEAD(&event->list); |
752 | ||
753 | if (!event->type) { | |
48dd0fed | 754 | struct list_head *list = NULL; |
060fa5c8 | 755 | |
609a7404 | 756 | if (next_event_type > TRACE_EVENT_TYPE_MAX) { |
060fa5c8 SR |
757 | |
758 | event->type = trace_search_list(&list); | |
759 | if (!event->type) | |
760 | goto out; | |
761 | ||
762 | } else { | |
8e1e1df2 | 763 | |
060fa5c8 SR |
764 | event->type = next_event_type++; |
765 | list = &ftrace_event_list; | |
766 | } | |
767 | ||
768 | if (WARN_ON(ftrace_find_event(event->type))) | |
769 | goto out; | |
770 | ||
771 | list_add_tail(&event->list, list); | |
772 | ||
773 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
774 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
775 | WARN_ON(1); | |
f0868d1e | 776 | goto out; |
060fa5c8 SR |
777 | } else { |
778 | /* Is this event already used */ | |
779 | if (ftrace_find_event(event->type)) | |
780 | goto out; | |
781 | } | |
f0868d1e | 782 | |
a9a57763 SR |
783 | if (event->funcs->trace == NULL) |
784 | event->funcs->trace = trace_nop_print; | |
785 | if (event->funcs->raw == NULL) | |
786 | event->funcs->raw = trace_nop_print; | |
787 | if (event->funcs->hex == NULL) | |
788 | event->funcs->hex = trace_nop_print; | |
789 | if (event->funcs->binary == NULL) | |
790 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 791 | |
f0868d1e SR |
792 | key = event->type & (EVENT_HASHSIZE - 1); |
793 | ||
4f535968 | 794 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
795 | |
796 | ret = event->type; | |
797 | out: | |
52f6ad6d | 798 | up_write(&trace_event_sem); |
f0868d1e SR |
799 | |
800 | return ret; | |
801 | } | |
9023c930 | 802 | EXPORT_SYMBOL_GPL(register_trace_event); |
f0868d1e | 803 | |
110bf2b7 | 804 | /* |
52f6ad6d | 805 | * Used by module code with the trace_event_sem held for write. |
110bf2b7 | 806 | */ |
9023c930 | 807 | int __unregister_trace_event(struct trace_event *event) |
110bf2b7 SR |
808 | { |
809 | hlist_del(&event->node); | |
810 | list_del(&event->list); | |
811 | return 0; | |
812 | } | |
813 | ||
f0868d1e | 814 | /** |
9023c930 | 815 | * unregister_trace_event - remove a no longer used event |
f0868d1e SR |
816 | * @event: the event to remove |
817 | */ | |
9023c930 | 818 | int unregister_trace_event(struct trace_event *event) |
f0868d1e | 819 | { |
52f6ad6d | 820 | down_write(&trace_event_sem); |
9023c930 | 821 | __unregister_trace_event(event); |
52f6ad6d | 822 | up_write(&trace_event_sem); |
f0868d1e SR |
823 | |
824 | return 0; | |
825 | } | |
9023c930 | 826 | EXPORT_SYMBOL_GPL(unregister_trace_event); |
f633cef0 SR |
827 | |
828 | /* | |
829 | * Standard events | |
830 | */ | |
831 | ||
a9a57763 SR |
832 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
833 | struct trace_event *event) | |
f633cef0 | 834 | { |
19a7fe20 | 835 | trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type); |
ee5e51f5 | 836 | |
19a7fe20 | 837 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
838 | } |
839 | ||
840 | /* TRACE_FN */ | |
a9a57763 SR |
841 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
842 | struct trace_event *event) | |
f633cef0 SR |
843 | { |
844 | struct ftrace_entry *field; | |
2c9b238e | 845 | struct trace_seq *s = &iter->seq; |
f633cef0 | 846 | |
2c9b238e | 847 | trace_assign_type(field, iter->ent); |
f633cef0 | 848 | |
19a7fe20 | 849 | seq_print_ip_sym(s, field->ip, flags); |
f633cef0 SR |
850 | |
851 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
19a7fe20 SRRH |
852 | trace_seq_puts(s, " <-"); |
853 | seq_print_ip_sym(s, field->parent_ip, flags); | |
f633cef0 | 854 | } |
f633cef0 | 855 | |
19a7fe20 | 856 | trace_seq_putc(s, '\n'); |
f633cef0 | 857 | |
19a7fe20 | 858 | return trace_handle_return(s); |
f633cef0 SR |
859 | } |
860 | ||
a9a57763 SR |
861 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
862 | struct trace_event *event) | |
f633cef0 SR |
863 | { |
864 | struct ftrace_entry *field; | |
865 | ||
2c9b238e | 866 | trace_assign_type(field, iter->ent); |
f633cef0 | 867 | |
19a7fe20 SRRH |
868 | trace_seq_printf(&iter->seq, "%lx %lx\n", |
869 | field->ip, | |
870 | field->parent_ip); | |
f633cef0 | 871 | |
19a7fe20 | 872 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
873 | } |
874 | ||
a9a57763 SR |
875 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
876 | struct trace_event *event) | |
f633cef0 SR |
877 | { |
878 | struct ftrace_entry *field; | |
2c9b238e | 879 | struct trace_seq *s = &iter->seq; |
f633cef0 | 880 | |
2c9b238e | 881 | trace_assign_type(field, iter->ent); |
f633cef0 | 882 | |
19a7fe20 SRRH |
883 | SEQ_PUT_HEX_FIELD(s, field->ip); |
884 | SEQ_PUT_HEX_FIELD(s, field->parent_ip); | |
f633cef0 | 885 | |
19a7fe20 | 886 | return trace_handle_return(s); |
f633cef0 SR |
887 | } |
888 | ||
a9a57763 SR |
889 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
890 | struct trace_event *event) | |
f633cef0 SR |
891 | { |
892 | struct ftrace_entry *field; | |
2c9b238e | 893 | struct trace_seq *s = &iter->seq; |
f633cef0 | 894 | |
2c9b238e | 895 | trace_assign_type(field, iter->ent); |
f633cef0 | 896 | |
19a7fe20 SRRH |
897 | SEQ_PUT_FIELD(s, field->ip); |
898 | SEQ_PUT_FIELD(s, field->parent_ip); | |
f633cef0 | 899 | |
19a7fe20 | 900 | return trace_handle_return(s); |
f633cef0 SR |
901 | } |
902 | ||
a9a57763 | 903 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 904 | .trace = trace_fn_trace, |
f633cef0 SR |
905 | .raw = trace_fn_raw, |
906 | .hex = trace_fn_hex, | |
907 | .binary = trace_fn_bin, | |
908 | }; | |
909 | ||
a9a57763 SR |
910 | static struct trace_event trace_fn_event = { |
911 | .type = TRACE_FN, | |
912 | .funcs = &trace_fn_funcs, | |
913 | }; | |
914 | ||
f633cef0 | 915 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
916 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
917 | char *delim) | |
f633cef0 SR |
918 | { |
919 | struct ctx_switch_entry *field; | |
4ca53085 | 920 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
921 | int S, T; |
922 | ||
4ca53085 | 923 | |
2c9b238e | 924 | trace_assign_type(field, iter->ent); |
f633cef0 | 925 | |
1d48b080 PZ |
926 | T = task_index_to_char(field->next_state); |
927 | S = task_index_to_char(field->prev_state); | |
4ca53085 | 928 | trace_find_cmdline(field->next_pid, comm); |
19a7fe20 SRRH |
929 | trace_seq_printf(&iter->seq, |
930 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
931 | field->prev_pid, | |
932 | field->prev_prio, | |
933 | S, delim, | |
934 | field->next_cpu, | |
935 | field->next_pid, | |
936 | field->next_prio, | |
937 | T, comm); | |
938 | ||
939 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
940 | } |
941 | ||
a9a57763 SR |
942 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
943 | struct trace_event *event) | |
f633cef0 | 944 | { |
2c9b238e | 945 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
946 | } |
947 | ||
ae7462b4 | 948 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 949 | int flags, struct trace_event *event) |
f633cef0 | 950 | { |
2c9b238e | 951 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
952 | } |
953 | ||
2c9b238e | 954 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
955 | { |
956 | struct ctx_switch_entry *field; | |
957 | int T; | |
958 | ||
2c9b238e | 959 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
960 | |
961 | if (!S) | |
1d48b080 PZ |
962 | S = task_index_to_char(field->prev_state); |
963 | T = task_index_to_char(field->next_state); | |
19a7fe20 SRRH |
964 | trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
965 | field->prev_pid, | |
966 | field->prev_prio, | |
967 | S, | |
968 | field->next_cpu, | |
969 | field->next_pid, | |
970 | field->next_prio, | |
971 | T); | |
972 | ||
973 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
974 | } |
975 | ||
a9a57763 SR |
976 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
977 | struct trace_event *event) | |
f633cef0 | 978 | { |
2c9b238e | 979 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
980 | } |
981 | ||
a9a57763 SR |
982 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
983 | struct trace_event *event) | |
f633cef0 | 984 | { |
2c9b238e | 985 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
986 | } |
987 | ||
988 | ||
2c9b238e | 989 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
990 | { |
991 | struct ctx_switch_entry *field; | |
2c9b238e | 992 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
993 | int T; |
994 | ||
2c9b238e | 995 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
996 | |
997 | if (!S) | |
1d48b080 PZ |
998 | S = task_index_to_char(field->prev_state); |
999 | T = task_index_to_char(field->next_state); | |
f633cef0 | 1000 | |
19a7fe20 SRRH |
1001 | SEQ_PUT_HEX_FIELD(s, field->prev_pid); |
1002 | SEQ_PUT_HEX_FIELD(s, field->prev_prio); | |
1003 | SEQ_PUT_HEX_FIELD(s, S); | |
1004 | SEQ_PUT_HEX_FIELD(s, field->next_cpu); | |
1005 | SEQ_PUT_HEX_FIELD(s, field->next_pid); | |
1006 | SEQ_PUT_HEX_FIELD(s, field->next_prio); | |
1007 | SEQ_PUT_HEX_FIELD(s, T); | |
f633cef0 | 1008 | |
19a7fe20 | 1009 | return trace_handle_return(s); |
f633cef0 SR |
1010 | } |
1011 | ||
a9a57763 SR |
1012 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1013 | struct trace_event *event) | |
f633cef0 | 1014 | { |
2c9b238e | 1015 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1016 | } |
1017 | ||
a9a57763 SR |
1018 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1019 | struct trace_event *event) | |
f633cef0 | 1020 | { |
2c9b238e | 1021 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1022 | } |
1023 | ||
ae7462b4 | 1024 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1025 | int flags, struct trace_event *event) |
f633cef0 SR |
1026 | { |
1027 | struct ctx_switch_entry *field; | |
2c9b238e | 1028 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1029 | |
2c9b238e | 1030 | trace_assign_type(field, iter->ent); |
f633cef0 | 1031 | |
19a7fe20 SRRH |
1032 | SEQ_PUT_FIELD(s, field->prev_pid); |
1033 | SEQ_PUT_FIELD(s, field->prev_prio); | |
1034 | SEQ_PUT_FIELD(s, field->prev_state); | |
1035 | SEQ_PUT_FIELD(s, field->next_cpu); | |
1036 | SEQ_PUT_FIELD(s, field->next_pid); | |
1037 | SEQ_PUT_FIELD(s, field->next_prio); | |
1038 | SEQ_PUT_FIELD(s, field->next_state); | |
f633cef0 | 1039 | |
19a7fe20 | 1040 | return trace_handle_return(s); |
f633cef0 SR |
1041 | } |
1042 | ||
a9a57763 | 1043 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1044 | .trace = trace_ctx_print, |
f633cef0 SR |
1045 | .raw = trace_ctx_raw, |
1046 | .hex = trace_ctx_hex, | |
1047 | .binary = trace_ctxwake_bin, | |
1048 | }; | |
1049 | ||
a9a57763 SR |
1050 | static struct trace_event trace_ctx_event = { |
1051 | .type = TRACE_CTX, | |
1052 | .funcs = &trace_ctx_funcs, | |
1053 | }; | |
1054 | ||
1055 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1056 | .trace = trace_wake_print, |
f633cef0 SR |
1057 | .raw = trace_wake_raw, |
1058 | .hex = trace_wake_hex, | |
1059 | .binary = trace_ctxwake_bin, | |
1060 | }; | |
1061 | ||
a9a57763 SR |
1062 | static struct trace_event trace_wake_event = { |
1063 | .type = TRACE_WAKE, | |
1064 | .funcs = &trace_wake_funcs, | |
1065 | }; | |
1066 | ||
f633cef0 SR |
1067 | /* TRACE_STACK */ |
1068 | ||
ae7462b4 | 1069 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1070 | int flags, struct trace_event *event) |
f633cef0 SR |
1071 | { |
1072 | struct stack_entry *field; | |
2c9b238e | 1073 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1074 | unsigned long *p; |
1075 | unsigned long *end; | |
f633cef0 | 1076 | |
2c9b238e | 1077 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1078 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1079 | |
19a7fe20 | 1080 | trace_seq_puts(s, "<stack trace>\n"); |
4a9bd3f1 SR |
1081 | |
1082 | for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { | |
f633cef0 | 1083 | |
19a7fe20 SRRH |
1084 | if (trace_seq_has_overflowed(s)) |
1085 | break; | |
f633cef0 | 1086 | |
19a7fe20 SRRH |
1087 | trace_seq_puts(s, " => "); |
1088 | seq_print_ip_sym(s, *p, flags); | |
1089 | trace_seq_putc(s, '\n'); | |
1090 | } | |
f633cef0 | 1091 | |
19a7fe20 | 1092 | return trace_handle_return(s); |
f633cef0 SR |
1093 | } |
1094 | ||
a9a57763 | 1095 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1096 | .trace = trace_stack_print, |
f633cef0 SR |
1097 | }; |
1098 | ||
a9a57763 SR |
1099 | static struct trace_event trace_stack_event = { |
1100 | .type = TRACE_STACK, | |
1101 | .funcs = &trace_stack_funcs, | |
1102 | }; | |
1103 | ||
f633cef0 | 1104 | /* TRACE_USER_STACK */ |
ae7462b4 | 1105 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1106 | int flags, struct trace_event *event) |
f633cef0 | 1107 | { |
983f938a | 1108 | struct trace_array *tr = iter->tr; |
f633cef0 | 1109 | struct userstack_entry *field; |
2c9b238e | 1110 | struct trace_seq *s = &iter->seq; |
6b1032d5 SRRH |
1111 | struct mm_struct *mm = NULL; |
1112 | unsigned int i; | |
f633cef0 | 1113 | |
2c9b238e | 1114 | trace_assign_type(field, iter->ent); |
f633cef0 | 1115 | |
19a7fe20 | 1116 | trace_seq_puts(s, "<user stack trace>\n"); |
6b1032d5 | 1117 | |
983f938a | 1118 | if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) { |
6b1032d5 SRRH |
1119 | struct task_struct *task; |
1120 | /* | |
1121 | * we do the lookup on the thread group leader, | |
1122 | * since individual threads might have already quit! | |
1123 | */ | |
1124 | rcu_read_lock(); | |
1125 | task = find_task_by_vpid(field->tgid); | |
1126 | if (task) | |
1127 | mm = get_task_mm(task); | |
1128 | rcu_read_unlock(); | |
1129 | } | |
1130 | ||
1131 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
1132 | unsigned long ip = field->caller[i]; | |
1133 | ||
1134 | if (ip == ULONG_MAX || trace_seq_has_overflowed(s)) | |
1135 | break; | |
1136 | ||
1137 | trace_seq_puts(s, " => "); | |
1138 | ||
1139 | if (!ip) { | |
1140 | trace_seq_puts(s, "??"); | |
1141 | trace_seq_putc(s, '\n'); | |
1142 | continue; | |
1143 | } | |
1144 | ||
1145 | seq_print_user_ip(s, mm, ip, flags); | |
1146 | trace_seq_putc(s, '\n'); | |
1147 | } | |
1148 | ||
1149 | if (mm) | |
1150 | mmput(mm); | |
f633cef0 | 1151 | |
19a7fe20 | 1152 | return trace_handle_return(s); |
f633cef0 SR |
1153 | } |
1154 | ||
a9a57763 | 1155 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1156 | .trace = trace_user_stack_print, |
f633cef0 SR |
1157 | }; |
1158 | ||
a9a57763 SR |
1159 | static struct trace_event trace_user_stack_event = { |
1160 | .type = TRACE_USER_STACK, | |
1161 | .funcs = &trace_user_stack_funcs, | |
1162 | }; | |
1163 | ||
e7c15cd8 SRRH |
1164 | /* TRACE_HWLAT */ |
1165 | static enum print_line_t | |
1166 | trace_hwlat_print(struct trace_iterator *iter, int flags, | |
1167 | struct trace_event *event) | |
1168 | { | |
1169 | struct trace_entry *entry = iter->ent; | |
1170 | struct trace_seq *s = &iter->seq; | |
1171 | struct hwlat_entry *field; | |
1172 | ||
1173 | trace_assign_type(field, entry); | |
1174 | ||
51aad0ae | 1175 | trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld", |
e7c15cd8 SRRH |
1176 | field->seqnum, |
1177 | field->duration, | |
1178 | field->outer_duration, | |
51aad0ae | 1179 | (long long)field->timestamp.tv_sec, |
e7c15cd8 SRRH |
1180 | field->timestamp.tv_nsec); |
1181 | ||
7b2c8625 SRRH |
1182 | if (field->nmi_count) { |
1183 | /* | |
1184 | * The generic sched_clock() is not NMI safe, thus | |
1185 | * we only record the count and not the time. | |
1186 | */ | |
1187 | if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK)) | |
1188 | trace_seq_printf(s, " nmi-total:%llu", | |
1189 | field->nmi_total_ts); | |
1190 | trace_seq_printf(s, " nmi-count:%u", | |
1191 | field->nmi_count); | |
1192 | } | |
1193 | ||
1194 | trace_seq_putc(s, '\n'); | |
1195 | ||
e7c15cd8 SRRH |
1196 | return trace_handle_return(s); |
1197 | } | |
1198 | ||
1199 | ||
1200 | static enum print_line_t | |
1201 | trace_hwlat_raw(struct trace_iterator *iter, int flags, | |
1202 | struct trace_event *event) | |
1203 | { | |
1204 | struct hwlat_entry *field; | |
1205 | struct trace_seq *s = &iter->seq; | |
1206 | ||
1207 | trace_assign_type(field, iter->ent); | |
1208 | ||
51aad0ae | 1209 | trace_seq_printf(s, "%llu %lld %lld %09ld %u\n", |
e7c15cd8 SRRH |
1210 | field->duration, |
1211 | field->outer_duration, | |
51aad0ae | 1212 | (long long)field->timestamp.tv_sec, |
e7c15cd8 SRRH |
1213 | field->timestamp.tv_nsec, |
1214 | field->seqnum); | |
1215 | ||
1216 | return trace_handle_return(s); | |
1217 | } | |
1218 | ||
1219 | static struct trace_event_functions trace_hwlat_funcs = { | |
1220 | .trace = trace_hwlat_print, | |
1221 | .raw = trace_hwlat_raw, | |
1222 | }; | |
1223 | ||
1224 | static struct trace_event trace_hwlat_event = { | |
1225 | .type = TRACE_HWLAT, | |
1226 | .funcs = &trace_hwlat_funcs, | |
1227 | }; | |
1228 | ||
09ae7234 SRRH |
1229 | /* TRACE_BPUTS */ |
1230 | static enum print_line_t | |
1231 | trace_bputs_print(struct trace_iterator *iter, int flags, | |
1232 | struct trace_event *event) | |
1233 | { | |
1234 | struct trace_entry *entry = iter->ent; | |
1235 | struct trace_seq *s = &iter->seq; | |
1236 | struct bputs_entry *field; | |
1237 | ||
1238 | trace_assign_type(field, entry); | |
1239 | ||
19a7fe20 SRRH |
1240 | seq_print_ip_sym(s, field->ip, flags); |
1241 | trace_seq_puts(s, ": "); | |
1242 | trace_seq_puts(s, field->str); | |
09ae7234 | 1243 | |
19a7fe20 | 1244 | return trace_handle_return(s); |
09ae7234 SRRH |
1245 | } |
1246 | ||
1247 | ||
1248 | static enum print_line_t | |
1249 | trace_bputs_raw(struct trace_iterator *iter, int flags, | |
1250 | struct trace_event *event) | |
1251 | { | |
1252 | struct bputs_entry *field; | |
1253 | struct trace_seq *s = &iter->seq; | |
1254 | ||
1255 | trace_assign_type(field, iter->ent); | |
1256 | ||
19a7fe20 SRRH |
1257 | trace_seq_printf(s, ": %lx : ", field->ip); |
1258 | trace_seq_puts(s, field->str); | |
09ae7234 | 1259 | |
19a7fe20 | 1260 | return trace_handle_return(s); |
09ae7234 SRRH |
1261 | } |
1262 | ||
1263 | static struct trace_event_functions trace_bputs_funcs = { | |
1264 | .trace = trace_bputs_print, | |
1265 | .raw = trace_bputs_raw, | |
1266 | }; | |
1267 | ||
1268 | static struct trace_event trace_bputs_event = { | |
1269 | .type = TRACE_BPUTS, | |
1270 | .funcs = &trace_bputs_funcs, | |
1271 | }; | |
1272 | ||
48ead020 | 1273 | /* TRACE_BPRINT */ |
1427cdf0 | 1274 | static enum print_line_t |
a9a57763 SR |
1275 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1276 | struct trace_event *event) | |
1427cdf0 LJ |
1277 | { |
1278 | struct trace_entry *entry = iter->ent; | |
1279 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1280 | struct bprint_entry *field; |
1427cdf0 LJ |
1281 | |
1282 | trace_assign_type(field, entry); | |
1283 | ||
19a7fe20 SRRH |
1284 | seq_print_ip_sym(s, field->ip, flags); |
1285 | trace_seq_puts(s, ": "); | |
1286 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1287 | |
19a7fe20 | 1288 | return trace_handle_return(s); |
1427cdf0 LJ |
1289 | } |
1290 | ||
769b0441 | 1291 | |
48ead020 | 1292 | static enum print_line_t |
a9a57763 SR |
1293 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1294 | struct trace_event *event) | |
1427cdf0 | 1295 | { |
48ead020 | 1296 | struct bprint_entry *field; |
1427cdf0 | 1297 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1298 | |
769b0441 | 1299 | trace_assign_type(field, iter->ent); |
1427cdf0 | 1300 | |
19a7fe20 SRRH |
1301 | trace_seq_printf(s, ": %lx : ", field->ip); |
1302 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1303 | |
19a7fe20 | 1304 | return trace_handle_return(s); |
1427cdf0 LJ |
1305 | } |
1306 | ||
a9a57763 SR |
1307 | static struct trace_event_functions trace_bprint_funcs = { |
1308 | .trace = trace_bprint_print, | |
1309 | .raw = trace_bprint_raw, | |
1310 | }; | |
769b0441 | 1311 | |
48ead020 FW |
1312 | static struct trace_event trace_bprint_event = { |
1313 | .type = TRACE_BPRINT, | |
a9a57763 | 1314 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1315 | }; |
1316 | ||
1317 | /* TRACE_PRINT */ | |
1318 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1319 | int flags, struct trace_event *event) |
48ead020 FW |
1320 | { |
1321 | struct print_entry *field; | |
1322 | struct trace_seq *s = &iter->seq; | |
1323 | ||
1324 | trace_assign_type(field, iter->ent); | |
1325 | ||
19a7fe20 SRRH |
1326 | seq_print_ip_sym(s, field->ip, flags); |
1327 | trace_seq_printf(s, ": %s", field->buf); | |
48ead020 | 1328 | |
19a7fe20 | 1329 | return trace_handle_return(s); |
48ead020 FW |
1330 | } |
1331 | ||
a9a57763 SR |
1332 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1333 | struct trace_event *event) | |
48ead020 FW |
1334 | { |
1335 | struct print_entry *field; | |
1336 | ||
1337 | trace_assign_type(field, iter->ent); | |
1338 | ||
19a7fe20 | 1339 | trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf); |
48ead020 | 1340 | |
19a7fe20 | 1341 | return trace_handle_return(&iter->seq); |
48ead020 FW |
1342 | } |
1343 | ||
a9a57763 | 1344 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1345 | .trace = trace_print_print, |
1346 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1347 | }; |
1348 | ||
a9a57763 SR |
1349 | static struct trace_event trace_print_event = { |
1350 | .type = TRACE_PRINT, | |
1351 | .funcs = &trace_print_funcs, | |
1352 | }; | |
1353 | ||
fa32e855 SR |
1354 | static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags, |
1355 | struct trace_event *event) | |
1356 | { | |
1357 | struct raw_data_entry *field; | |
1358 | int i; | |
1359 | ||
1360 | trace_assign_type(field, iter->ent); | |
1361 | ||
1362 | trace_seq_printf(&iter->seq, "# %x buf:", field->id); | |
1363 | ||
1364 | for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++) | |
1365 | trace_seq_printf(&iter->seq, " %02x", | |
1366 | (unsigned char)field->buf[i]); | |
1367 | ||
1368 | trace_seq_putc(&iter->seq, '\n'); | |
1369 | ||
1370 | return trace_handle_return(&iter->seq); | |
1371 | } | |
1372 | ||
1373 | static struct trace_event_functions trace_raw_data_funcs = { | |
1374 | .trace = trace_raw_data, | |
1375 | .raw = trace_raw_data, | |
1376 | }; | |
1377 | ||
1378 | static struct trace_event trace_raw_data_event = { | |
1379 | .type = TRACE_RAW_DATA, | |
1380 | .funcs = &trace_raw_data_funcs, | |
1381 | }; | |
1382 | ||
48ead020 | 1383 | |
f633cef0 SR |
1384 | static struct trace_event *events[] __initdata = { |
1385 | &trace_fn_event, | |
1386 | &trace_ctx_event, | |
1387 | &trace_wake_event, | |
f633cef0 SR |
1388 | &trace_stack_event, |
1389 | &trace_user_stack_event, | |
09ae7234 | 1390 | &trace_bputs_event, |
48ead020 | 1391 | &trace_bprint_event, |
f633cef0 | 1392 | &trace_print_event, |
e7c15cd8 | 1393 | &trace_hwlat_event, |
fa32e855 | 1394 | &trace_raw_data_event, |
f633cef0 SR |
1395 | NULL |
1396 | }; | |
1397 | ||
1398 | __init static int init_events(void) | |
1399 | { | |
1400 | struct trace_event *event; | |
1401 | int i, ret; | |
1402 | ||
1403 | for (i = 0; events[i]; i++) { | |
1404 | event = events[i]; | |
1405 | ||
9023c930 | 1406 | ret = register_trace_event(event); |
f633cef0 SR |
1407 | if (!ret) { |
1408 | printk(KERN_WARNING "event %d failed to register\n", | |
1409 | event->type); | |
1410 | WARN_ON_ONCE(1); | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | return 0; | |
1415 | } | |
7374e827 | 1416 | early_initcall(init_events); |