]>
Commit | Line | Data |
---|---|---|
f0868d1e SR |
1 | /* |
2 | * trace_output.c | |
3 | * | |
4 | * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> | |
5 | * | |
6 | */ | |
f0868d1e SR |
7 | #include <linux/module.h> |
8 | #include <linux/mutex.h> | |
9 | #include <linux/ftrace.h> | |
e6017571 | 10 | #include <linux/sched/clock.h> |
6e84f315 | 11 | #include <linux/sched/mm.h> |
f0868d1e SR |
12 | |
13 | #include "trace_output.h" | |
14 | ||
15 | /* must be a power of 2 */ | |
16 | #define EVENT_HASHSIZE 128 | |
17 | ||
52f6ad6d | 18 | DECLARE_RWSEM(trace_event_sem); |
be74b73a | 19 | |
f0868d1e SR |
20 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; |
21 | ||
22 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
23 | ||
09ae7234 SRRH |
24 | enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter) |
25 | { | |
26 | struct trace_seq *s = &iter->seq; | |
27 | struct trace_entry *entry = iter->ent; | |
28 | struct bputs_entry *field; | |
09ae7234 SRRH |
29 | |
30 | trace_assign_type(field, entry); | |
31 | ||
19a7fe20 | 32 | trace_seq_puts(s, field->str); |
09ae7234 | 33 | |
19a7fe20 | 34 | return trace_handle_return(s); |
09ae7234 SRRH |
35 | } |
36 | ||
5ef841f6 SR |
37 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
38 | { | |
39 | struct trace_seq *s = &iter->seq; | |
40 | struct trace_entry *entry = iter->ent; | |
41 | struct bprint_entry *field; | |
5ef841f6 SR |
42 | |
43 | trace_assign_type(field, entry); | |
44 | ||
19a7fe20 | 45 | trace_seq_bprintf(s, field->fmt, field->buf); |
5ef841f6 | 46 | |
19a7fe20 | 47 | return trace_handle_return(s); |
5ef841f6 SR |
48 | } |
49 | ||
50 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
51 | { | |
52 | struct trace_seq *s = &iter->seq; | |
53 | struct trace_entry *entry = iter->ent; | |
54 | struct print_entry *field; | |
5ef841f6 SR |
55 | |
56 | trace_assign_type(field, entry); | |
57 | ||
19a7fe20 | 58 | trace_seq_puts(s, field->buf); |
5ef841f6 | 59 | |
19a7fe20 | 60 | return trace_handle_return(s); |
5ef841f6 SR |
61 | } |
62 | ||
be74b73a | 63 | const char * |
645df987 SRRH |
64 | trace_print_flags_seq(struct trace_seq *p, const char *delim, |
65 | unsigned long flags, | |
66 | const struct trace_print_flags *flag_array) | |
be74b73a SR |
67 | { |
68 | unsigned long mask; | |
69 | const char *str; | |
7b039cb4 | 70 | const char *ret = trace_seq_buffer_ptr(p); |
e404b321 | 71 | int i, first = 1; |
be74b73a | 72 | |
be74b73a SR |
73 | for (i = 0; flag_array[i].name && flags; i++) { |
74 | ||
75 | mask = flag_array[i].mask; | |
76 | if ((flags & mask) != mask) | |
77 | continue; | |
78 | ||
79 | str = flag_array[i].name; | |
80 | flags &= ~mask; | |
e404b321 | 81 | if (!first && delim) |
be74b73a | 82 | trace_seq_puts(p, delim); |
e404b321 AV |
83 | else |
84 | first = 0; | |
be74b73a SR |
85 | trace_seq_puts(p, str); |
86 | } | |
87 | ||
88 | /* check for left over flags */ | |
89 | if (flags) { | |
5b349261 | 90 | if (!first && delim) |
be74b73a SR |
91 | trace_seq_puts(p, delim); |
92 | trace_seq_printf(p, "0x%lx", flags); | |
93 | } | |
94 | ||
95 | trace_seq_putc(p, 0); | |
96 | ||
56d8bd3f | 97 | return ret; |
be74b73a | 98 | } |
645df987 | 99 | EXPORT_SYMBOL(trace_print_flags_seq); |
be74b73a | 100 | |
0f4fc29d | 101 | const char * |
645df987 SRRH |
102 | trace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
103 | const struct trace_print_flags *symbol_array) | |
0f4fc29d SR |
104 | { |
105 | int i; | |
7b039cb4 | 106 | const char *ret = trace_seq_buffer_ptr(p); |
0f4fc29d SR |
107 | |
108 | for (i = 0; symbol_array[i].name; i++) { | |
109 | ||
110 | if (val != symbol_array[i].mask) | |
111 | continue; | |
112 | ||
113 | trace_seq_puts(p, symbol_array[i].name); | |
114 | break; | |
115 | } | |
116 | ||
7b039cb4 | 117 | if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
0f4fc29d | 118 | trace_seq_printf(p, "0x%lx", val); |
8e1e1df2 | 119 | |
0f4fc29d SR |
120 | trace_seq_putc(p, 0); |
121 | ||
56d8bd3f | 122 | return ret; |
0f4fc29d | 123 | } |
645df987 | 124 | EXPORT_SYMBOL(trace_print_symbols_seq); |
0f4fc29d | 125 | |
2fc1b6f0 | 126 | #if BITS_PER_LONG == 32 |
d3213e8f RZ |
127 | const char * |
128 | trace_print_flags_seq_u64(struct trace_seq *p, const char *delim, | |
129 | unsigned long long flags, | |
130 | const struct trace_print_flags_u64 *flag_array) | |
131 | { | |
132 | unsigned long long mask; | |
133 | const char *str; | |
134 | const char *ret = trace_seq_buffer_ptr(p); | |
135 | int i, first = 1; | |
136 | ||
137 | for (i = 0; flag_array[i].name && flags; i++) { | |
138 | ||
139 | mask = flag_array[i].mask; | |
140 | if ((flags & mask) != mask) | |
141 | continue; | |
142 | ||
143 | str = flag_array[i].name; | |
144 | flags &= ~mask; | |
145 | if (!first && delim) | |
146 | trace_seq_puts(p, delim); | |
147 | else | |
148 | first = 0; | |
149 | trace_seq_puts(p, str); | |
150 | } | |
151 | ||
152 | /* check for left over flags */ | |
153 | if (flags) { | |
154 | if (!first && delim) | |
155 | trace_seq_puts(p, delim); | |
156 | trace_seq_printf(p, "0x%llx", flags); | |
157 | } | |
158 | ||
159 | trace_seq_putc(p, 0); | |
160 | ||
161 | return ret; | |
162 | } | |
163 | EXPORT_SYMBOL(trace_print_flags_seq_u64); | |
164 | ||
2fc1b6f0 | 165 | const char * |
645df987 | 166 | trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, |
2fc1b6f0 | 167 | const struct trace_print_flags_u64 *symbol_array) |
168 | { | |
169 | int i; | |
7b039cb4 | 170 | const char *ret = trace_seq_buffer_ptr(p); |
2fc1b6f0 | 171 | |
172 | for (i = 0; symbol_array[i].name; i++) { | |
173 | ||
174 | if (val != symbol_array[i].mask) | |
175 | continue; | |
176 | ||
177 | trace_seq_puts(p, symbol_array[i].name); | |
178 | break; | |
179 | } | |
180 | ||
7b039cb4 | 181 | if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
2fc1b6f0 | 182 | trace_seq_printf(p, "0x%llx", val); |
183 | ||
184 | trace_seq_putc(p, 0); | |
185 | ||
186 | return ret; | |
187 | } | |
645df987 | 188 | EXPORT_SYMBOL(trace_print_symbols_seq_u64); |
2fc1b6f0 | 189 | #endif |
190 | ||
4449bf92 | 191 | const char * |
645df987 SRRH |
192 | trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, |
193 | unsigned int bitmask_size) | |
4449bf92 | 194 | { |
7b039cb4 | 195 | const char *ret = trace_seq_buffer_ptr(p); |
4449bf92 SRRH |
196 | |
197 | trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8); | |
198 | trace_seq_putc(p, 0); | |
199 | ||
200 | return ret; | |
201 | } | |
645df987 | 202 | EXPORT_SYMBOL_GPL(trace_print_bitmask_seq); |
4449bf92 | 203 | |
3898fac1 DB |
204 | /** |
205 | * trace_print_hex_seq - print buffer as hex sequence | |
206 | * @p: trace seq struct to write to | |
207 | * @buf: The buffer to print | |
208 | * @buf_len: Length of @buf in bytes | |
209 | * @concatenate: Print @buf as single hex string or with spacing | |
210 | * | |
211 | * Prints the passed buffer as a hex sequence either as a whole, | |
212 | * single hex string if @concatenate is true or with spacing after | |
213 | * each byte in case @concatenate is false. | |
214 | */ | |
5a2e3995 | 215 | const char * |
2acae0d5 | 216 | trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len, |
3898fac1 | 217 | bool concatenate) |
5a2e3995 KT |
218 | { |
219 | int i; | |
7b039cb4 | 220 | const char *ret = trace_seq_buffer_ptr(p); |
5a2e3995 KT |
221 | |
222 | for (i = 0; i < buf_len; i++) | |
3898fac1 | 223 | trace_seq_printf(p, "%s%2.2x", concatenate || i == 0 ? "" : " ", |
2acae0d5 | 224 | buf[i]); |
5a2e3995 KT |
225 | trace_seq_putc(p, 0); |
226 | ||
227 | return ret; | |
228 | } | |
645df987 | 229 | EXPORT_SYMBOL(trace_print_hex_seq); |
5a2e3995 | 230 | |
6ea22486 | 231 | const char * |
645df987 SRRH |
232 | trace_print_array_seq(struct trace_seq *p, const void *buf, int count, |
233 | size_t el_size) | |
6ea22486 DM |
234 | { |
235 | const char *ret = trace_seq_buffer_ptr(p); | |
236 | const char *prefix = ""; | |
237 | void *ptr = (void *)buf; | |
ac01ce14 | 238 | size_t buf_len = count * el_size; |
6ea22486 DM |
239 | |
240 | trace_seq_putc(p, '{'); | |
241 | ||
242 | while (ptr < buf + buf_len) { | |
243 | switch (el_size) { | |
244 | case 1: | |
245 | trace_seq_printf(p, "%s0x%x", prefix, | |
246 | *(u8 *)ptr); | |
247 | break; | |
248 | case 2: | |
249 | trace_seq_printf(p, "%s0x%x", prefix, | |
250 | *(u16 *)ptr); | |
251 | break; | |
252 | case 4: | |
253 | trace_seq_printf(p, "%s0x%x", prefix, | |
254 | *(u32 *)ptr); | |
255 | break; | |
256 | case 8: | |
257 | trace_seq_printf(p, "%s0x%llx", prefix, | |
258 | *(u64 *)ptr); | |
259 | break; | |
260 | default: | |
261 | trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size, | |
262 | *(u8 *)ptr); | |
263 | el_size = 1; | |
264 | } | |
265 | prefix = ","; | |
266 | ptr += el_size; | |
267 | } | |
268 | ||
269 | trace_seq_putc(p, '}'); | |
270 | trace_seq_putc(p, 0); | |
271 | ||
272 | return ret; | |
273 | } | |
645df987 | 274 | EXPORT_SYMBOL(trace_print_array_seq); |
6ea22486 | 275 | |
892c505a SRRH |
276 | int trace_raw_output_prep(struct trace_iterator *iter, |
277 | struct trace_event *trace_event) | |
f71130de | 278 | { |
2425bcb9 | 279 | struct trace_event_call *event; |
f71130de LZ |
280 | struct trace_seq *s = &iter->seq; |
281 | struct trace_seq *p = &iter->tmp_seq; | |
282 | struct trace_entry *entry; | |
f71130de | 283 | |
2425bcb9 | 284 | event = container_of(trace_event, struct trace_event_call, event); |
f71130de LZ |
285 | entry = iter->ent; |
286 | ||
287 | if (entry->type != event->event.type) { | |
288 | WARN_ON_ONCE(1); | |
289 | return TRACE_TYPE_UNHANDLED; | |
290 | } | |
291 | ||
292 | trace_seq_init(p); | |
687fcc4a | 293 | trace_seq_printf(s, "%s: ", trace_event_name(event)); |
19a7fe20 | 294 | |
8e2e095c | 295 | return trace_handle_return(s); |
f71130de | 296 | } |
892c505a | 297 | EXPORT_SYMBOL(trace_raw_output_prep); |
f71130de | 298 | |
892c505a SRRH |
299 | static int trace_output_raw(struct trace_iterator *iter, char *name, |
300 | char *fmt, va_list ap) | |
1d6bae96 SR |
301 | { |
302 | struct trace_seq *s = &iter->seq; | |
1d6bae96 | 303 | |
19a7fe20 SRRH |
304 | trace_seq_printf(s, "%s: ", name); |
305 | trace_seq_vprintf(s, fmt, ap); | |
1d6bae96 | 306 | |
19a7fe20 | 307 | return trace_handle_return(s); |
1d6bae96 SR |
308 | } |
309 | ||
892c505a | 310 | int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...) |
1d6bae96 SR |
311 | { |
312 | va_list ap; | |
313 | int ret; | |
314 | ||
315 | va_start(ap, fmt); | |
892c505a | 316 | ret = trace_output_raw(iter, name, fmt, ap); |
1d6bae96 SR |
317 | va_end(ap); |
318 | ||
319 | return ret; | |
320 | } | |
892c505a | 321 | EXPORT_SYMBOL_GPL(trace_output_call); |
1d6bae96 | 322 | |
f0868d1e SR |
323 | #ifdef CONFIG_KRETPROBES |
324 | static inline const char *kretprobed(const char *name) | |
325 | { | |
326 | static const char tramp_name[] = "kretprobe_trampoline"; | |
327 | int size = sizeof(tramp_name); | |
328 | ||
329 | if (strncmp(tramp_name, name, size) == 0) | |
330 | return "[unknown/kretprobe'd]"; | |
331 | return name; | |
332 | } | |
333 | #else | |
334 | static inline const char *kretprobed(const char *name) | |
335 | { | |
336 | return name; | |
337 | } | |
338 | #endif /* CONFIG_KRETPROBES */ | |
339 | ||
19a7fe20 | 340 | static void |
f0868d1e SR |
341 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) |
342 | { | |
f0868d1e | 343 | char str[KSYM_SYMBOL_LEN]; |
feaf1283 | 344 | #ifdef CONFIG_KALLSYMS |
f0868d1e SR |
345 | const char *name; |
346 | ||
347 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
348 | ||
349 | name = kretprobed(str); | |
350 | ||
feaf1283 SRV |
351 | if (name && strlen(name)) { |
352 | trace_seq_printf(s, fmt, name); | |
353 | return; | |
354 | } | |
f0868d1e | 355 | #endif |
feaf1283 SRV |
356 | snprintf(str, KSYM_SYMBOL_LEN, "0x%08lx", address); |
357 | trace_seq_printf(s, fmt, str); | |
f0868d1e SR |
358 | } |
359 | ||
19a7fe20 | 360 | static void |
f0868d1e SR |
361 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, |
362 | unsigned long address) | |
363 | { | |
f0868d1e | 364 | char str[KSYM_SYMBOL_LEN]; |
feaf1283 | 365 | #ifdef CONFIG_KALLSYMS |
f0868d1e SR |
366 | const char *name; |
367 | ||
368 | sprint_symbol(str, address); | |
369 | name = kretprobed(str); | |
370 | ||
feaf1283 SRV |
371 | if (name && strlen(name)) { |
372 | trace_seq_printf(s, fmt, name); | |
373 | return; | |
374 | } | |
f0868d1e | 375 | #endif |
feaf1283 SRV |
376 | snprintf(str, KSYM_SYMBOL_LEN, "0x%08lx", address); |
377 | trace_seq_printf(s, fmt, str); | |
f0868d1e SR |
378 | } |
379 | ||
380 | #ifndef CONFIG_64BIT | |
381 | # define IP_FMT "%08lx" | |
382 | #else | |
383 | # define IP_FMT "%016lx" | |
384 | #endif | |
385 | ||
ef92480a SRRH |
386 | static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, |
387 | unsigned long ip, unsigned long sym_flags) | |
f0868d1e SR |
388 | { |
389 | struct file *file = NULL; | |
390 | unsigned long vmstart = 0; | |
391 | int ret = 1; | |
392 | ||
d184b31c JB |
393 | if (s->full) |
394 | return 0; | |
395 | ||
f0868d1e SR |
396 | if (mm) { |
397 | const struct vm_area_struct *vma; | |
398 | ||
399 | down_read(&mm->mmap_sem); | |
400 | vma = find_vma(mm, ip); | |
401 | if (vma) { | |
402 | file = vma->vm_file; | |
403 | vmstart = vma->vm_start; | |
404 | } | |
405 | if (file) { | |
406 | ret = trace_seq_path(s, &file->f_path); | |
407 | if (ret) | |
19a7fe20 SRRH |
408 | trace_seq_printf(s, "[+0x%lx]", |
409 | ip - vmstart); | |
f0868d1e SR |
410 | } |
411 | up_read(&mm->mmap_sem); | |
412 | } | |
413 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
19a7fe20 SRRH |
414 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
415 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
416 | } |
417 | ||
f0868d1e SR |
418 | int |
419 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
420 | { | |
19a7fe20 SRRH |
421 | if (!ip) { |
422 | trace_seq_putc(s, '0'); | |
423 | goto out; | |
424 | } | |
f0868d1e SR |
425 | |
426 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
19a7fe20 | 427 | seq_print_sym_offset(s, "%s", ip); |
f0868d1e | 428 | else |
19a7fe20 | 429 | seq_print_sym_short(s, "%s", ip); |
f0868d1e SR |
430 | |
431 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
19a7fe20 SRRH |
432 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
433 | ||
434 | out: | |
435 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
436 | } |
437 | ||
f81c972d SR |
438 | /** |
439 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
440 | * @s: trace seq struct to write to | |
441 | * @entry: The trace entry field from the ring buffer | |
442 | * | |
443 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 444 | * count. |
f81c972d SR |
445 | */ |
446 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 447 | { |
10da37a6 DS |
448 | char hardsoft_irq; |
449 | char need_resched; | |
450 | char irqs_off; | |
451 | int hardirq; | |
452 | int softirq; | |
7e6867bf | 453 | int nmi; |
c4a8e8be | 454 | |
7e6867bf | 455 | nmi = entry->flags & TRACE_FLAG_NMI; |
c4a8e8be FW |
456 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
457 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 458 | |
10da37a6 DS |
459 | irqs_off = |
460 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
461 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
462 | '.'; | |
e5137b50 PZ |
463 | |
464 | switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | | |
465 | TRACE_FLAG_PREEMPT_RESCHED)) { | |
466 | case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: | |
467 | need_resched = 'N'; | |
468 | break; | |
469 | case TRACE_FLAG_NEED_RESCHED: | |
470 | need_resched = 'n'; | |
471 | break; | |
472 | case TRACE_FLAG_PREEMPT_RESCHED: | |
473 | need_resched = 'p'; | |
474 | break; | |
475 | default: | |
476 | need_resched = '.'; | |
477 | break; | |
478 | } | |
479 | ||
10da37a6 | 480 | hardsoft_irq = |
7e6867bf PZ |
481 | (nmi && hardirq) ? 'Z' : |
482 | nmi ? 'z' : | |
10da37a6 | 483 | (hardirq && softirq) ? 'H' : |
7e6867bf PZ |
484 | hardirq ? 'h' : |
485 | softirq ? 's' : | |
486 | '.' ; | |
10da37a6 | 487 | |
19a7fe20 SRRH |
488 | trace_seq_printf(s, "%c%c%c", |
489 | irqs_off, need_resched, hardsoft_irq); | |
c4a8e8be | 490 | |
829b876d | 491 | if (entry->preempt_count) |
19a7fe20 | 492 | trace_seq_printf(s, "%x", entry->preempt_count); |
637e7e86 | 493 | else |
19a7fe20 | 494 | trace_seq_putc(s, '.'); |
829b876d | 495 | |
19a7fe20 | 496 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
497 | } |
498 | ||
f81c972d SR |
499 | static int |
500 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
501 | { | |
502 | char comm[TASK_COMM_LEN]; | |
503 | ||
504 | trace_find_cmdline(entry->pid, comm); | |
505 | ||
19a7fe20 SRRH |
506 | trace_seq_printf(s, "%8.8s-%-5d %3d", |
507 | comm, entry->pid, cpu); | |
f81c972d SR |
508 | |
509 | return trace_print_lat_fmt(s, entry); | |
510 | } | |
511 | ||
8e1e1df2 BP |
512 | #undef MARK |
513 | #define MARK(v, s) {.val = v, .sym = s} | |
514 | /* trace overhead mark */ | |
515 | static const struct trace_mark { | |
516 | unsigned long long val; /* unit: nsec */ | |
517 | char sym; | |
518 | } mark[] = { | |
519 | MARK(1000000000ULL , '$'), /* 1 sec */ | |
b838e1d9 JL |
520 | MARK(100000000ULL , '@'), /* 100 msec */ |
521 | MARK(10000000ULL , '*'), /* 10 msec */ | |
8e1e1df2 BP |
522 | MARK(1000000ULL , '#'), /* 1000 usecs */ |
523 | MARK(100000ULL , '!'), /* 100 usecs */ | |
524 | MARK(10000ULL , '+'), /* 10 usecs */ | |
525 | }; | |
526 | #undef MARK | |
527 | ||
528 | char trace_find_mark(unsigned long long d) | |
529 | { | |
530 | int i; | |
531 | int size = ARRAY_SIZE(mark); | |
532 | ||
533 | for (i = 0; i < size; i++) { | |
b838e1d9 | 534 | if (d > mark[i].val) |
8e1e1df2 BP |
535 | break; |
536 | } | |
537 | ||
538 | return (i == size) ? ' ' : mark[i].sym; | |
539 | } | |
c4a8e8be | 540 | |
d9793bd8 | 541 | static int |
8be0709f | 542 | lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
c4a8e8be | 543 | { |
983f938a SRRH |
544 | struct trace_array *tr = iter->tr; |
545 | unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE; | |
8be0709f | 546 | unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; |
12883efb | 547 | unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start; |
8be0709f DS |
548 | unsigned long long rel_ts = next_ts - iter->ts; |
549 | struct trace_seq *s = &iter->seq; | |
550 | ||
551 | if (in_ns) { | |
552 | abs_ts = ns2usecs(abs_ts); | |
553 | rel_ts = ns2usecs(rel_ts); | |
554 | } | |
555 | ||
556 | if (verbose && in_ns) { | |
557 | unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); | |
558 | unsigned long abs_msec = (unsigned long)abs_ts; | |
559 | unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); | |
560 | unsigned long rel_msec = (unsigned long)rel_ts; | |
561 | ||
19a7fe20 SRRH |
562 | trace_seq_printf( |
563 | s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", | |
564 | ns2usecs(iter->ts), | |
565 | abs_msec, abs_usec, | |
566 | rel_msec, rel_usec); | |
567 | ||
8be0709f | 568 | } else if (verbose && !in_ns) { |
19a7fe20 SRRH |
569 | trace_seq_printf( |
570 | s, "[%016llx] %lld (+%lld): ", | |
571 | iter->ts, abs_ts, rel_ts); | |
572 | ||
8be0709f | 573 | } else if (!verbose && in_ns) { |
19a7fe20 SRRH |
574 | trace_seq_printf( |
575 | s, " %4lldus%c: ", | |
576 | abs_ts, | |
8e1e1df2 | 577 | trace_find_mark(rel_ts * NSEC_PER_USEC)); |
19a7fe20 | 578 | |
8be0709f | 579 | } else { /* !verbose && !in_ns */ |
19a7fe20 | 580 | trace_seq_printf(s, " %4lld: ", abs_ts); |
8be0709f | 581 | } |
19a7fe20 SRRH |
582 | |
583 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
584 | } |
585 | ||
586 | int trace_print_context(struct trace_iterator *iter) | |
587 | { | |
983f938a | 588 | struct trace_array *tr = iter->tr; |
c4a8e8be FW |
589 | struct trace_seq *s = &iter->seq; |
590 | struct trace_entry *entry = iter->ent; | |
8be0709f DS |
591 | unsigned long long t; |
592 | unsigned long secs, usec_rem; | |
4ca53085 SR |
593 | char comm[TASK_COMM_LEN]; |
594 | ||
595 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 596 | |
19a7fe20 | 597 | trace_seq_printf(s, "%16s-%-5d [%03d] ", |
77271ce4 | 598 | comm, entry->pid, iter->cpu); |
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 | ||
983f938a | 609 | if (tr->trace_flags & TRACE_ITER_IRQ_INFO) |
19a7fe20 | 610 | trace_print_lat_fmt(s, entry); |
77271ce4 | 611 | |
8be0709f DS |
612 | if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { |
613 | t = ns2usecs(iter->ts); | |
614 | usec_rem = do_div(t, USEC_PER_SEC); | |
615 | secs = (unsigned long)t; | |
19a7fe20 | 616 | trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); |
8be0709f | 617 | } else |
19a7fe20 SRRH |
618 | trace_seq_printf(s, " %12llu: ", iter->ts); |
619 | ||
620 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
621 | } |
622 | ||
623 | int trace_print_lat_context(struct trace_iterator *iter) | |
624 | { | |
983f938a | 625 | struct trace_array *tr = iter->tr; |
db4c75cb SR |
626 | /* trace_find_next_entry will reset ent_size */ |
627 | int ent_size = iter->ent_size; | |
c4a8e8be | 628 | struct trace_seq *s = &iter->seq; |
983f938a | 629 | u64 next_ts; |
c4a8e8be FW |
630 | struct trace_entry *entry = iter->ent, |
631 | *next_entry = trace_find_next_entry(iter, NULL, | |
632 | &next_ts); | |
983f938a | 633 | unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE); |
c4a8e8be | 634 | |
db4c75cb SR |
635 | /* Restore the original ent_size */ |
636 | iter->ent_size = ent_size; | |
637 | ||
c4a8e8be FW |
638 | if (!next_entry) |
639 | next_ts = iter->ts; | |
c4a8e8be FW |
640 | |
641 | if (verbose) { | |
4ca53085 SR |
642 | char comm[TASK_COMM_LEN]; |
643 | ||
644 | trace_find_cmdline(entry->pid, comm); | |
645 | ||
19a7fe20 SRRH |
646 | trace_seq_printf( |
647 | s, "%16s %5d %3d %d %08x %08lx ", | |
648 | comm, entry->pid, iter->cpu, entry->flags, | |
649 | entry->preempt_count, iter->idx); | |
c4a8e8be | 650 | } else { |
19a7fe20 | 651 | lat_print_generic(s, entry, iter->cpu); |
c4a8e8be FW |
652 | } |
653 | ||
19a7fe20 | 654 | lat_print_timestamp(iter, next_ts); |
8be0709f | 655 | |
19a7fe20 | 656 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
657 | } |
658 | ||
f633cef0 SR |
659 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
660 | ||
661 | static int task_state_char(unsigned long state) | |
662 | { | |
663 | int bit = state ? __ffs(state) + 1 : 0; | |
664 | ||
665 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
666 | } | |
667 | ||
f0868d1e SR |
668 | /** |
669 | * ftrace_find_event - find a registered event | |
670 | * @type: the type of event to look for | |
671 | * | |
672 | * Returns an event of type @type otherwise NULL | |
4f535968 | 673 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
674 | */ |
675 | struct trace_event *ftrace_find_event(int type) | |
676 | { | |
677 | struct trace_event *event; | |
f0868d1e SR |
678 | unsigned key; |
679 | ||
680 | key = type & (EVENT_HASHSIZE - 1); | |
681 | ||
b67bfe0d | 682 | hlist_for_each_entry(event, &event_hash[key], node) { |
f0868d1e SR |
683 | if (event->type == type) |
684 | return event; | |
685 | } | |
686 | ||
687 | return NULL; | |
688 | } | |
689 | ||
060fa5c8 SR |
690 | static LIST_HEAD(ftrace_event_list); |
691 | ||
692 | static int trace_search_list(struct list_head **list) | |
693 | { | |
694 | struct trace_event *e; | |
695 | int last = __TRACE_LAST_TYPE; | |
696 | ||
697 | if (list_empty(&ftrace_event_list)) { | |
698 | *list = &ftrace_event_list; | |
699 | return last + 1; | |
700 | } | |
701 | ||
702 | /* | |
703 | * We used up all possible max events, | |
704 | * lets see if somebody freed one. | |
705 | */ | |
706 | list_for_each_entry(e, &ftrace_event_list, list) { | |
707 | if (e->type != last + 1) | |
708 | break; | |
709 | last++; | |
710 | } | |
711 | ||
712 | /* Did we used up all 65 thousand events??? */ | |
609a7404 | 713 | if ((last + 1) > TRACE_EVENT_TYPE_MAX) |
060fa5c8 SR |
714 | return 0; |
715 | ||
716 | *list = &e->list; | |
717 | return last + 1; | |
718 | } | |
719 | ||
4f535968 LJ |
720 | void trace_event_read_lock(void) |
721 | { | |
52f6ad6d | 722 | down_read(&trace_event_sem); |
4f535968 LJ |
723 | } |
724 | ||
725 | void trace_event_read_unlock(void) | |
726 | { | |
52f6ad6d | 727 | up_read(&trace_event_sem); |
4f535968 LJ |
728 | } |
729 | ||
f0868d1e | 730 | /** |
9023c930 | 731 | * register_trace_event - register output for an event type |
f0868d1e SR |
732 | * @event: the event type to register |
733 | * | |
734 | * Event types are stored in a hash and this hash is used to | |
735 | * find a way to print an event. If the @event->type is set | |
736 | * then it will use that type, otherwise it will assign a | |
737 | * type to use. | |
738 | * | |
739 | * If you assign your own type, please make sure it is added | |
740 | * to the trace_type enum in trace.h, to avoid collisions | |
741 | * with the dynamic types. | |
742 | * | |
743 | * Returns the event type number or zero on error. | |
744 | */ | |
9023c930 | 745 | int register_trace_event(struct trace_event *event) |
f0868d1e SR |
746 | { |
747 | unsigned key; | |
748 | int ret = 0; | |
749 | ||
52f6ad6d | 750 | down_write(&trace_event_sem); |
f0868d1e | 751 | |
060fa5c8 | 752 | if (WARN_ON(!event)) |
28bea271 | 753 | goto out; |
28bea271 | 754 | |
a9a57763 SR |
755 | if (WARN_ON(!event->funcs)) |
756 | goto out; | |
757 | ||
060fa5c8 SR |
758 | INIT_LIST_HEAD(&event->list); |
759 | ||
760 | if (!event->type) { | |
48dd0fed | 761 | struct list_head *list = NULL; |
060fa5c8 | 762 | |
609a7404 | 763 | if (next_event_type > TRACE_EVENT_TYPE_MAX) { |
060fa5c8 SR |
764 | |
765 | event->type = trace_search_list(&list); | |
766 | if (!event->type) | |
767 | goto out; | |
768 | ||
769 | } else { | |
8e1e1df2 | 770 | |
060fa5c8 SR |
771 | event->type = next_event_type++; |
772 | list = &ftrace_event_list; | |
773 | } | |
774 | ||
775 | if (WARN_ON(ftrace_find_event(event->type))) | |
776 | goto out; | |
777 | ||
778 | list_add_tail(&event->list, list); | |
779 | ||
780 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
781 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
782 | WARN_ON(1); | |
f0868d1e | 783 | goto out; |
060fa5c8 SR |
784 | } else { |
785 | /* Is this event already used */ | |
786 | if (ftrace_find_event(event->type)) | |
787 | goto out; | |
788 | } | |
f0868d1e | 789 | |
a9a57763 SR |
790 | if (event->funcs->trace == NULL) |
791 | event->funcs->trace = trace_nop_print; | |
792 | if (event->funcs->raw == NULL) | |
793 | event->funcs->raw = trace_nop_print; | |
794 | if (event->funcs->hex == NULL) | |
795 | event->funcs->hex = trace_nop_print; | |
796 | if (event->funcs->binary == NULL) | |
797 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 798 | |
f0868d1e SR |
799 | key = event->type & (EVENT_HASHSIZE - 1); |
800 | ||
4f535968 | 801 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
802 | |
803 | ret = event->type; | |
804 | out: | |
52f6ad6d | 805 | up_write(&trace_event_sem); |
f0868d1e SR |
806 | |
807 | return ret; | |
808 | } | |
9023c930 | 809 | EXPORT_SYMBOL_GPL(register_trace_event); |
f0868d1e | 810 | |
110bf2b7 | 811 | /* |
52f6ad6d | 812 | * Used by module code with the trace_event_sem held for write. |
110bf2b7 | 813 | */ |
9023c930 | 814 | int __unregister_trace_event(struct trace_event *event) |
110bf2b7 SR |
815 | { |
816 | hlist_del(&event->node); | |
817 | list_del(&event->list); | |
818 | return 0; | |
819 | } | |
820 | ||
f0868d1e | 821 | /** |
9023c930 | 822 | * unregister_trace_event - remove a no longer used event |
f0868d1e SR |
823 | * @event: the event to remove |
824 | */ | |
9023c930 | 825 | int unregister_trace_event(struct trace_event *event) |
f0868d1e | 826 | { |
52f6ad6d | 827 | down_write(&trace_event_sem); |
9023c930 | 828 | __unregister_trace_event(event); |
52f6ad6d | 829 | up_write(&trace_event_sem); |
f0868d1e SR |
830 | |
831 | return 0; | |
832 | } | |
9023c930 | 833 | EXPORT_SYMBOL_GPL(unregister_trace_event); |
f633cef0 SR |
834 | |
835 | /* | |
836 | * Standard events | |
837 | */ | |
838 | ||
a9a57763 SR |
839 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
840 | struct trace_event *event) | |
f633cef0 | 841 | { |
19a7fe20 | 842 | trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type); |
ee5e51f5 | 843 | |
19a7fe20 | 844 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
845 | } |
846 | ||
847 | /* TRACE_FN */ | |
a9a57763 SR |
848 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
849 | struct trace_event *event) | |
f633cef0 SR |
850 | { |
851 | struct ftrace_entry *field; | |
2c9b238e | 852 | struct trace_seq *s = &iter->seq; |
f633cef0 | 853 | |
2c9b238e | 854 | trace_assign_type(field, iter->ent); |
f633cef0 | 855 | |
19a7fe20 | 856 | seq_print_ip_sym(s, field->ip, flags); |
f633cef0 SR |
857 | |
858 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
19a7fe20 SRRH |
859 | trace_seq_puts(s, " <-"); |
860 | seq_print_ip_sym(s, field->parent_ip, flags); | |
f633cef0 | 861 | } |
f633cef0 | 862 | |
19a7fe20 | 863 | trace_seq_putc(s, '\n'); |
f633cef0 | 864 | |
19a7fe20 | 865 | return trace_handle_return(s); |
f633cef0 SR |
866 | } |
867 | ||
a9a57763 SR |
868 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
869 | struct trace_event *event) | |
f633cef0 SR |
870 | { |
871 | struct ftrace_entry *field; | |
872 | ||
2c9b238e | 873 | trace_assign_type(field, iter->ent); |
f633cef0 | 874 | |
19a7fe20 SRRH |
875 | trace_seq_printf(&iter->seq, "%lx %lx\n", |
876 | field->ip, | |
877 | field->parent_ip); | |
f633cef0 | 878 | |
19a7fe20 | 879 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
880 | } |
881 | ||
a9a57763 SR |
882 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
883 | struct trace_event *event) | |
f633cef0 SR |
884 | { |
885 | struct ftrace_entry *field; | |
2c9b238e | 886 | struct trace_seq *s = &iter->seq; |
f633cef0 | 887 | |
2c9b238e | 888 | trace_assign_type(field, iter->ent); |
f633cef0 | 889 | |
19a7fe20 SRRH |
890 | SEQ_PUT_HEX_FIELD(s, field->ip); |
891 | SEQ_PUT_HEX_FIELD(s, field->parent_ip); | |
f633cef0 | 892 | |
19a7fe20 | 893 | return trace_handle_return(s); |
f633cef0 SR |
894 | } |
895 | ||
a9a57763 SR |
896 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
897 | struct trace_event *event) | |
f633cef0 SR |
898 | { |
899 | struct ftrace_entry *field; | |
2c9b238e | 900 | struct trace_seq *s = &iter->seq; |
f633cef0 | 901 | |
2c9b238e | 902 | trace_assign_type(field, iter->ent); |
f633cef0 | 903 | |
19a7fe20 SRRH |
904 | SEQ_PUT_FIELD(s, field->ip); |
905 | SEQ_PUT_FIELD(s, field->parent_ip); | |
f633cef0 | 906 | |
19a7fe20 | 907 | return trace_handle_return(s); |
f633cef0 SR |
908 | } |
909 | ||
a9a57763 | 910 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 911 | .trace = trace_fn_trace, |
f633cef0 SR |
912 | .raw = trace_fn_raw, |
913 | .hex = trace_fn_hex, | |
914 | .binary = trace_fn_bin, | |
915 | }; | |
916 | ||
a9a57763 SR |
917 | static struct trace_event trace_fn_event = { |
918 | .type = TRACE_FN, | |
919 | .funcs = &trace_fn_funcs, | |
920 | }; | |
921 | ||
f633cef0 | 922 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
923 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
924 | char *delim) | |
f633cef0 SR |
925 | { |
926 | struct ctx_switch_entry *field; | |
4ca53085 | 927 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
928 | int S, T; |
929 | ||
4ca53085 | 930 | |
2c9b238e | 931 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
932 | |
933 | T = task_state_char(field->next_state); | |
934 | S = task_state_char(field->prev_state); | |
4ca53085 | 935 | trace_find_cmdline(field->next_pid, comm); |
19a7fe20 SRRH |
936 | trace_seq_printf(&iter->seq, |
937 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
938 | field->prev_pid, | |
939 | field->prev_prio, | |
940 | S, delim, | |
941 | field->next_cpu, | |
942 | field->next_pid, | |
943 | field->next_prio, | |
944 | T, comm); | |
945 | ||
946 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
947 | } |
948 | ||
a9a57763 SR |
949 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
950 | struct trace_event *event) | |
f633cef0 | 951 | { |
2c9b238e | 952 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
953 | } |
954 | ||
ae7462b4 | 955 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 956 | int flags, struct trace_event *event) |
f633cef0 | 957 | { |
2c9b238e | 958 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
959 | } |
960 | ||
2c9b238e | 961 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
962 | { |
963 | struct ctx_switch_entry *field; | |
964 | int T; | |
965 | ||
2c9b238e | 966 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
967 | |
968 | if (!S) | |
b0f56f1a | 969 | S = task_state_char(field->prev_state); |
f633cef0 | 970 | T = task_state_char(field->next_state); |
19a7fe20 SRRH |
971 | trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
972 | field->prev_pid, | |
973 | field->prev_prio, | |
974 | S, | |
975 | field->next_cpu, | |
976 | field->next_pid, | |
977 | field->next_prio, | |
978 | T); | |
979 | ||
980 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
981 | } |
982 | ||
a9a57763 SR |
983 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
984 | struct trace_event *event) | |
f633cef0 | 985 | { |
2c9b238e | 986 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
987 | } |
988 | ||
a9a57763 SR |
989 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
990 | struct trace_event *event) | |
f633cef0 | 991 | { |
2c9b238e | 992 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
993 | } |
994 | ||
995 | ||
2c9b238e | 996 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
997 | { |
998 | struct ctx_switch_entry *field; | |
2c9b238e | 999 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
1000 | int T; |
1001 | ||
2c9b238e | 1002 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
1003 | |
1004 | if (!S) | |
b0f56f1a | 1005 | S = task_state_char(field->prev_state); |
f633cef0 SR |
1006 | T = task_state_char(field->next_state); |
1007 | ||
19a7fe20 SRRH |
1008 | SEQ_PUT_HEX_FIELD(s, field->prev_pid); |
1009 | SEQ_PUT_HEX_FIELD(s, field->prev_prio); | |
1010 | SEQ_PUT_HEX_FIELD(s, S); | |
1011 | SEQ_PUT_HEX_FIELD(s, field->next_cpu); | |
1012 | SEQ_PUT_HEX_FIELD(s, field->next_pid); | |
1013 | SEQ_PUT_HEX_FIELD(s, field->next_prio); | |
1014 | SEQ_PUT_HEX_FIELD(s, T); | |
f633cef0 | 1015 | |
19a7fe20 | 1016 | return trace_handle_return(s); |
f633cef0 SR |
1017 | } |
1018 | ||
a9a57763 SR |
1019 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
1020 | struct trace_event *event) | |
f633cef0 | 1021 | { |
2c9b238e | 1022 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
1023 | } |
1024 | ||
a9a57763 SR |
1025 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
1026 | struct trace_event *event) | |
f633cef0 | 1027 | { |
2c9b238e | 1028 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1029 | } |
1030 | ||
ae7462b4 | 1031 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1032 | int flags, struct trace_event *event) |
f633cef0 SR |
1033 | { |
1034 | struct ctx_switch_entry *field; | |
2c9b238e | 1035 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1036 | |
2c9b238e | 1037 | trace_assign_type(field, iter->ent); |
f633cef0 | 1038 | |
19a7fe20 SRRH |
1039 | SEQ_PUT_FIELD(s, field->prev_pid); |
1040 | SEQ_PUT_FIELD(s, field->prev_prio); | |
1041 | SEQ_PUT_FIELD(s, field->prev_state); | |
1042 | SEQ_PUT_FIELD(s, field->next_cpu); | |
1043 | SEQ_PUT_FIELD(s, field->next_pid); | |
1044 | SEQ_PUT_FIELD(s, field->next_prio); | |
1045 | SEQ_PUT_FIELD(s, field->next_state); | |
f633cef0 | 1046 | |
19a7fe20 | 1047 | return trace_handle_return(s); |
f633cef0 SR |
1048 | } |
1049 | ||
a9a57763 | 1050 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1051 | .trace = trace_ctx_print, |
f633cef0 SR |
1052 | .raw = trace_ctx_raw, |
1053 | .hex = trace_ctx_hex, | |
1054 | .binary = trace_ctxwake_bin, | |
1055 | }; | |
1056 | ||
a9a57763 SR |
1057 | static struct trace_event trace_ctx_event = { |
1058 | .type = TRACE_CTX, | |
1059 | .funcs = &trace_ctx_funcs, | |
1060 | }; | |
1061 | ||
1062 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1063 | .trace = trace_wake_print, |
f633cef0 SR |
1064 | .raw = trace_wake_raw, |
1065 | .hex = trace_wake_hex, | |
1066 | .binary = trace_ctxwake_bin, | |
1067 | }; | |
1068 | ||
a9a57763 SR |
1069 | static struct trace_event trace_wake_event = { |
1070 | .type = TRACE_WAKE, | |
1071 | .funcs = &trace_wake_funcs, | |
1072 | }; | |
1073 | ||
f633cef0 SR |
1074 | /* TRACE_STACK */ |
1075 | ||
ae7462b4 | 1076 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1077 | int flags, struct trace_event *event) |
f633cef0 SR |
1078 | { |
1079 | struct stack_entry *field; | |
2c9b238e | 1080 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1081 | unsigned long *p; |
1082 | unsigned long *end; | |
f633cef0 | 1083 | |
2c9b238e | 1084 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1085 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1086 | |
19a7fe20 | 1087 | trace_seq_puts(s, "<stack trace>\n"); |
4a9bd3f1 SR |
1088 | |
1089 | for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { | |
f633cef0 | 1090 | |
19a7fe20 SRRH |
1091 | if (trace_seq_has_overflowed(s)) |
1092 | break; | |
f633cef0 | 1093 | |
19a7fe20 SRRH |
1094 | trace_seq_puts(s, " => "); |
1095 | seq_print_ip_sym(s, *p, flags); | |
1096 | trace_seq_putc(s, '\n'); | |
1097 | } | |
f633cef0 | 1098 | |
19a7fe20 | 1099 | return trace_handle_return(s); |
f633cef0 SR |
1100 | } |
1101 | ||
a9a57763 | 1102 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1103 | .trace = trace_stack_print, |
f633cef0 SR |
1104 | }; |
1105 | ||
a9a57763 SR |
1106 | static struct trace_event trace_stack_event = { |
1107 | .type = TRACE_STACK, | |
1108 | .funcs = &trace_stack_funcs, | |
1109 | }; | |
1110 | ||
f633cef0 | 1111 | /* TRACE_USER_STACK */ |
ae7462b4 | 1112 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1113 | int flags, struct trace_event *event) |
f633cef0 | 1114 | { |
983f938a | 1115 | struct trace_array *tr = iter->tr; |
f633cef0 | 1116 | struct userstack_entry *field; |
2c9b238e | 1117 | struct trace_seq *s = &iter->seq; |
6b1032d5 SRRH |
1118 | struct mm_struct *mm = NULL; |
1119 | unsigned int i; | |
f633cef0 | 1120 | |
2c9b238e | 1121 | trace_assign_type(field, iter->ent); |
f633cef0 | 1122 | |
19a7fe20 | 1123 | trace_seq_puts(s, "<user stack trace>\n"); |
6b1032d5 | 1124 | |
983f938a | 1125 | if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) { |
6b1032d5 SRRH |
1126 | struct task_struct *task; |
1127 | /* | |
1128 | * we do the lookup on the thread group leader, | |
1129 | * since individual threads might have already quit! | |
1130 | */ | |
1131 | rcu_read_lock(); | |
1132 | task = find_task_by_vpid(field->tgid); | |
1133 | if (task) | |
1134 | mm = get_task_mm(task); | |
1135 | rcu_read_unlock(); | |
1136 | } | |
1137 | ||
1138 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
1139 | unsigned long ip = field->caller[i]; | |
1140 | ||
1141 | if (ip == ULONG_MAX || trace_seq_has_overflowed(s)) | |
1142 | break; | |
1143 | ||
1144 | trace_seq_puts(s, " => "); | |
1145 | ||
1146 | if (!ip) { | |
1147 | trace_seq_puts(s, "??"); | |
1148 | trace_seq_putc(s, '\n'); | |
1149 | continue; | |
1150 | } | |
1151 | ||
1152 | seq_print_user_ip(s, mm, ip, flags); | |
1153 | trace_seq_putc(s, '\n'); | |
1154 | } | |
1155 | ||
1156 | if (mm) | |
1157 | mmput(mm); | |
f633cef0 | 1158 | |
19a7fe20 | 1159 | return trace_handle_return(s); |
f633cef0 SR |
1160 | } |
1161 | ||
a9a57763 | 1162 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1163 | .trace = trace_user_stack_print, |
f633cef0 SR |
1164 | }; |
1165 | ||
a9a57763 SR |
1166 | static struct trace_event trace_user_stack_event = { |
1167 | .type = TRACE_USER_STACK, | |
1168 | .funcs = &trace_user_stack_funcs, | |
1169 | }; | |
1170 | ||
e7c15cd8 SRRH |
1171 | /* TRACE_HWLAT */ |
1172 | static enum print_line_t | |
1173 | trace_hwlat_print(struct trace_iterator *iter, int flags, | |
1174 | struct trace_event *event) | |
1175 | { | |
1176 | struct trace_entry *entry = iter->ent; | |
1177 | struct trace_seq *s = &iter->seq; | |
1178 | struct hwlat_entry *field; | |
1179 | ||
1180 | trace_assign_type(field, entry); | |
1181 | ||
51aad0ae | 1182 | trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld", |
e7c15cd8 SRRH |
1183 | field->seqnum, |
1184 | field->duration, | |
1185 | field->outer_duration, | |
51aad0ae | 1186 | (long long)field->timestamp.tv_sec, |
e7c15cd8 SRRH |
1187 | field->timestamp.tv_nsec); |
1188 | ||
7b2c8625 SRRH |
1189 | if (field->nmi_count) { |
1190 | /* | |
1191 | * The generic sched_clock() is not NMI safe, thus | |
1192 | * we only record the count and not the time. | |
1193 | */ | |
1194 | if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK)) | |
1195 | trace_seq_printf(s, " nmi-total:%llu", | |
1196 | field->nmi_total_ts); | |
1197 | trace_seq_printf(s, " nmi-count:%u", | |
1198 | field->nmi_count); | |
1199 | } | |
1200 | ||
1201 | trace_seq_putc(s, '\n'); | |
1202 | ||
e7c15cd8 SRRH |
1203 | return trace_handle_return(s); |
1204 | } | |
1205 | ||
1206 | ||
1207 | static enum print_line_t | |
1208 | trace_hwlat_raw(struct trace_iterator *iter, int flags, | |
1209 | struct trace_event *event) | |
1210 | { | |
1211 | struct hwlat_entry *field; | |
1212 | struct trace_seq *s = &iter->seq; | |
1213 | ||
1214 | trace_assign_type(field, iter->ent); | |
1215 | ||
51aad0ae | 1216 | trace_seq_printf(s, "%llu %lld %lld %09ld %u\n", |
e7c15cd8 SRRH |
1217 | field->duration, |
1218 | field->outer_duration, | |
51aad0ae | 1219 | (long long)field->timestamp.tv_sec, |
e7c15cd8 SRRH |
1220 | field->timestamp.tv_nsec, |
1221 | field->seqnum); | |
1222 | ||
1223 | return trace_handle_return(s); | |
1224 | } | |
1225 | ||
1226 | static struct trace_event_functions trace_hwlat_funcs = { | |
1227 | .trace = trace_hwlat_print, | |
1228 | .raw = trace_hwlat_raw, | |
1229 | }; | |
1230 | ||
1231 | static struct trace_event trace_hwlat_event = { | |
1232 | .type = TRACE_HWLAT, | |
1233 | .funcs = &trace_hwlat_funcs, | |
1234 | }; | |
1235 | ||
09ae7234 SRRH |
1236 | /* TRACE_BPUTS */ |
1237 | static enum print_line_t | |
1238 | trace_bputs_print(struct trace_iterator *iter, int flags, | |
1239 | struct trace_event *event) | |
1240 | { | |
1241 | struct trace_entry *entry = iter->ent; | |
1242 | struct trace_seq *s = &iter->seq; | |
1243 | struct bputs_entry *field; | |
1244 | ||
1245 | trace_assign_type(field, entry); | |
1246 | ||
19a7fe20 SRRH |
1247 | seq_print_ip_sym(s, field->ip, flags); |
1248 | trace_seq_puts(s, ": "); | |
1249 | trace_seq_puts(s, field->str); | |
09ae7234 | 1250 | |
19a7fe20 | 1251 | return trace_handle_return(s); |
09ae7234 SRRH |
1252 | } |
1253 | ||
1254 | ||
1255 | static enum print_line_t | |
1256 | trace_bputs_raw(struct trace_iterator *iter, int flags, | |
1257 | struct trace_event *event) | |
1258 | { | |
1259 | struct bputs_entry *field; | |
1260 | struct trace_seq *s = &iter->seq; | |
1261 | ||
1262 | trace_assign_type(field, iter->ent); | |
1263 | ||
19a7fe20 SRRH |
1264 | trace_seq_printf(s, ": %lx : ", field->ip); |
1265 | trace_seq_puts(s, field->str); | |
09ae7234 | 1266 | |
19a7fe20 | 1267 | return trace_handle_return(s); |
09ae7234 SRRH |
1268 | } |
1269 | ||
1270 | static struct trace_event_functions trace_bputs_funcs = { | |
1271 | .trace = trace_bputs_print, | |
1272 | .raw = trace_bputs_raw, | |
1273 | }; | |
1274 | ||
1275 | static struct trace_event trace_bputs_event = { | |
1276 | .type = TRACE_BPUTS, | |
1277 | .funcs = &trace_bputs_funcs, | |
1278 | }; | |
1279 | ||
48ead020 | 1280 | /* TRACE_BPRINT */ |
1427cdf0 | 1281 | static enum print_line_t |
a9a57763 SR |
1282 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1283 | struct trace_event *event) | |
1427cdf0 LJ |
1284 | { |
1285 | struct trace_entry *entry = iter->ent; | |
1286 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1287 | struct bprint_entry *field; |
1427cdf0 LJ |
1288 | |
1289 | trace_assign_type(field, entry); | |
1290 | ||
19a7fe20 SRRH |
1291 | seq_print_ip_sym(s, field->ip, flags); |
1292 | trace_seq_puts(s, ": "); | |
1293 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1294 | |
19a7fe20 | 1295 | return trace_handle_return(s); |
1427cdf0 LJ |
1296 | } |
1297 | ||
769b0441 | 1298 | |
48ead020 | 1299 | static enum print_line_t |
a9a57763 SR |
1300 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1301 | struct trace_event *event) | |
1427cdf0 | 1302 | { |
48ead020 | 1303 | struct bprint_entry *field; |
1427cdf0 | 1304 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1305 | |
769b0441 | 1306 | trace_assign_type(field, iter->ent); |
1427cdf0 | 1307 | |
19a7fe20 SRRH |
1308 | trace_seq_printf(s, ": %lx : ", field->ip); |
1309 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1310 | |
19a7fe20 | 1311 | return trace_handle_return(s); |
1427cdf0 LJ |
1312 | } |
1313 | ||
a9a57763 SR |
1314 | static struct trace_event_functions trace_bprint_funcs = { |
1315 | .trace = trace_bprint_print, | |
1316 | .raw = trace_bprint_raw, | |
1317 | }; | |
769b0441 | 1318 | |
48ead020 FW |
1319 | static struct trace_event trace_bprint_event = { |
1320 | .type = TRACE_BPRINT, | |
a9a57763 | 1321 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1322 | }; |
1323 | ||
1324 | /* TRACE_PRINT */ | |
1325 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1326 | int flags, struct trace_event *event) |
48ead020 FW |
1327 | { |
1328 | struct print_entry *field; | |
1329 | struct trace_seq *s = &iter->seq; | |
1330 | ||
1331 | trace_assign_type(field, iter->ent); | |
1332 | ||
19a7fe20 SRRH |
1333 | seq_print_ip_sym(s, field->ip, flags); |
1334 | trace_seq_printf(s, ": %s", field->buf); | |
48ead020 | 1335 | |
19a7fe20 | 1336 | return trace_handle_return(s); |
48ead020 FW |
1337 | } |
1338 | ||
a9a57763 SR |
1339 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1340 | struct trace_event *event) | |
48ead020 FW |
1341 | { |
1342 | struct print_entry *field; | |
1343 | ||
1344 | trace_assign_type(field, iter->ent); | |
1345 | ||
19a7fe20 | 1346 | trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf); |
48ead020 | 1347 | |
19a7fe20 | 1348 | return trace_handle_return(&iter->seq); |
48ead020 FW |
1349 | } |
1350 | ||
a9a57763 | 1351 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1352 | .trace = trace_print_print, |
1353 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1354 | }; |
1355 | ||
a9a57763 SR |
1356 | static struct trace_event trace_print_event = { |
1357 | .type = TRACE_PRINT, | |
1358 | .funcs = &trace_print_funcs, | |
1359 | }; | |
1360 | ||
fa32e855 SR |
1361 | static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags, |
1362 | struct trace_event *event) | |
1363 | { | |
1364 | struct raw_data_entry *field; | |
1365 | int i; | |
1366 | ||
1367 | trace_assign_type(field, iter->ent); | |
1368 | ||
1369 | trace_seq_printf(&iter->seq, "# %x buf:", field->id); | |
1370 | ||
1371 | for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++) | |
1372 | trace_seq_printf(&iter->seq, " %02x", | |
1373 | (unsigned char)field->buf[i]); | |
1374 | ||
1375 | trace_seq_putc(&iter->seq, '\n'); | |
1376 | ||
1377 | return trace_handle_return(&iter->seq); | |
1378 | } | |
1379 | ||
1380 | static struct trace_event_functions trace_raw_data_funcs = { | |
1381 | .trace = trace_raw_data, | |
1382 | .raw = trace_raw_data, | |
1383 | }; | |
1384 | ||
1385 | static struct trace_event trace_raw_data_event = { | |
1386 | .type = TRACE_RAW_DATA, | |
1387 | .funcs = &trace_raw_data_funcs, | |
1388 | }; | |
1389 | ||
48ead020 | 1390 | |
f633cef0 SR |
1391 | static struct trace_event *events[] __initdata = { |
1392 | &trace_fn_event, | |
1393 | &trace_ctx_event, | |
1394 | &trace_wake_event, | |
f633cef0 SR |
1395 | &trace_stack_event, |
1396 | &trace_user_stack_event, | |
09ae7234 | 1397 | &trace_bputs_event, |
48ead020 | 1398 | &trace_bprint_event, |
f633cef0 | 1399 | &trace_print_event, |
e7c15cd8 | 1400 | &trace_hwlat_event, |
fa32e855 | 1401 | &trace_raw_data_event, |
f633cef0 SR |
1402 | NULL |
1403 | }; | |
1404 | ||
1405 | __init static int init_events(void) | |
1406 | { | |
1407 | struct trace_event *event; | |
1408 | int i, ret; | |
1409 | ||
1410 | for (i = 0; events[i]; i++) { | |
1411 | event = events[i]; | |
1412 | ||
9023c930 | 1413 | ret = register_trace_event(event); |
f633cef0 SR |
1414 | if (!ret) { |
1415 | printk(KERN_WARNING "event %d failed to register\n", | |
1416 | event->type); | |
1417 | WARN_ON_ONCE(1); | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | return 0; | |
1422 | } | |
7374e827 | 1423 | early_initcall(init_events); |