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 |
cc9f59fb | 342 | seq_print_sym(struct trace_seq *s, unsigned long address, bool offset) |
f0868d1e | 343 | { |
feaf1283 | 344 | #ifdef CONFIG_KALLSYMS |
bea6957d | 345 | char str[KSYM_SYMBOL_LEN]; |
f0868d1e SR |
346 | const char *name; |
347 | ||
59dd974b RV |
348 | if (offset) |
349 | sprint_symbol(str, address); | |
350 | else | |
351 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
f0868d1e SR |
352 | name = kretprobed(str); |
353 | ||
feaf1283 | 354 | if (name && strlen(name)) { |
bea6957d | 355 | trace_seq_puts(s, name); |
feaf1283 SRV |
356 | return; |
357 | } | |
f0868d1e | 358 | #endif |
bea6957d | 359 | trace_seq_printf(s, "0x%08lx", address); |
f0868d1e SR |
360 | } |
361 | ||
362 | #ifndef CONFIG_64BIT | |
363 | # define IP_FMT "%08lx" | |
364 | #else | |
365 | # define IP_FMT "%016lx" | |
366 | #endif | |
367 | ||
ef92480a SRRH |
368 | static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, |
369 | unsigned long ip, unsigned long sym_flags) | |
f0868d1e SR |
370 | { |
371 | struct file *file = NULL; | |
372 | unsigned long vmstart = 0; | |
373 | int ret = 1; | |
374 | ||
d184b31c JB |
375 | if (s->full) |
376 | return 0; | |
377 | ||
f0868d1e SR |
378 | if (mm) { |
379 | const struct vm_area_struct *vma; | |
380 | ||
381 | down_read(&mm->mmap_sem); | |
382 | vma = find_vma(mm, ip); | |
383 | if (vma) { | |
384 | file = vma->vm_file; | |
385 | vmstart = vma->vm_start; | |
386 | } | |
387 | if (file) { | |
388 | ret = trace_seq_path(s, &file->f_path); | |
389 | if (ret) | |
19a7fe20 SRRH |
390 | trace_seq_printf(s, "[+0x%lx]", |
391 | ip - vmstart); | |
f0868d1e SR |
392 | } |
393 | up_read(&mm->mmap_sem); | |
394 | } | |
395 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
19a7fe20 SRRH |
396 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
397 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
398 | } |
399 | ||
f0868d1e SR |
400 | int |
401 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
402 | { | |
19a7fe20 SRRH |
403 | if (!ip) { |
404 | trace_seq_putc(s, '0'); | |
405 | goto out; | |
406 | } | |
f0868d1e | 407 | |
cc9f59fb | 408 | seq_print_sym(s, ip, sym_flags & TRACE_ITER_SYM_OFFSET); |
f0868d1e SR |
409 | |
410 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
19a7fe20 SRRH |
411 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
412 | ||
413 | out: | |
414 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
415 | } |
416 | ||
f81c972d SR |
417 | /** |
418 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
419 | * @s: trace seq struct to write to | |
420 | * @entry: The trace entry field from the ring buffer | |
421 | * | |
422 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 423 | * count. |
f81c972d SR |
424 | */ |
425 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 426 | { |
10da37a6 DS |
427 | char hardsoft_irq; |
428 | char need_resched; | |
429 | char irqs_off; | |
430 | int hardirq; | |
431 | int softirq; | |
7e6867bf | 432 | int nmi; |
c4a8e8be | 433 | |
7e6867bf | 434 | nmi = entry->flags & TRACE_FLAG_NMI; |
c4a8e8be FW |
435 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
436 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 437 | |
10da37a6 DS |
438 | irqs_off = |
439 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
440 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
441 | '.'; | |
e5137b50 PZ |
442 | |
443 | switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | | |
444 | TRACE_FLAG_PREEMPT_RESCHED)) { | |
445 | case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: | |
446 | need_resched = 'N'; | |
447 | break; | |
448 | case TRACE_FLAG_NEED_RESCHED: | |
449 | need_resched = 'n'; | |
450 | break; | |
451 | case TRACE_FLAG_PREEMPT_RESCHED: | |
452 | need_resched = 'p'; | |
453 | break; | |
454 | default: | |
455 | need_resched = '.'; | |
456 | break; | |
457 | } | |
458 | ||
10da37a6 | 459 | hardsoft_irq = |
7e6867bf PZ |
460 | (nmi && hardirq) ? 'Z' : |
461 | nmi ? 'z' : | |
10da37a6 | 462 | (hardirq && softirq) ? 'H' : |
7e6867bf PZ |
463 | hardirq ? 'h' : |
464 | softirq ? 's' : | |
465 | '.' ; | |
10da37a6 | 466 | |
19a7fe20 SRRH |
467 | trace_seq_printf(s, "%c%c%c", |
468 | irqs_off, need_resched, hardsoft_irq); | |
c4a8e8be | 469 | |
829b876d | 470 | if (entry->preempt_count) |
19a7fe20 | 471 | trace_seq_printf(s, "%x", entry->preempt_count); |
637e7e86 | 472 | else |
19a7fe20 | 473 | trace_seq_putc(s, '.'); |
829b876d | 474 | |
19a7fe20 | 475 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
476 | } |
477 | ||
f81c972d SR |
478 | static int |
479 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
480 | { | |
481 | char comm[TASK_COMM_LEN]; | |
482 | ||
483 | trace_find_cmdline(entry->pid, comm); | |
484 | ||
19a7fe20 SRRH |
485 | trace_seq_printf(s, "%8.8s-%-5d %3d", |
486 | comm, entry->pid, cpu); | |
f81c972d SR |
487 | |
488 | return trace_print_lat_fmt(s, entry); | |
489 | } | |
490 | ||
8e1e1df2 BP |
491 | #undef MARK |
492 | #define MARK(v, s) {.val = v, .sym = s} | |
493 | /* trace overhead mark */ | |
494 | static const struct trace_mark { | |
495 | unsigned long long val; /* unit: nsec */ | |
496 | char sym; | |
497 | } mark[] = { | |
498 | MARK(1000000000ULL , '$'), /* 1 sec */ | |
b838e1d9 JL |
499 | MARK(100000000ULL , '@'), /* 100 msec */ |
500 | MARK(10000000ULL , '*'), /* 10 msec */ | |
8e1e1df2 BP |
501 | MARK(1000000ULL , '#'), /* 1000 usecs */ |
502 | MARK(100000ULL , '!'), /* 100 usecs */ | |
503 | MARK(10000ULL , '+'), /* 10 usecs */ | |
504 | }; | |
505 | #undef MARK | |
506 | ||
507 | char trace_find_mark(unsigned long long d) | |
508 | { | |
509 | int i; | |
510 | int size = ARRAY_SIZE(mark); | |
511 | ||
512 | for (i = 0; i < size; i++) { | |
b838e1d9 | 513 | if (d > mark[i].val) |
8e1e1df2 BP |
514 | break; |
515 | } | |
516 | ||
517 | return (i == size) ? ' ' : mark[i].sym; | |
518 | } | |
c4a8e8be | 519 | |
d9793bd8 | 520 | static int |
8be0709f | 521 | lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
c4a8e8be | 522 | { |
983f938a SRRH |
523 | struct trace_array *tr = iter->tr; |
524 | unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE; | |
8be0709f | 525 | unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; |
12883efb | 526 | unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start; |
8be0709f DS |
527 | unsigned long long rel_ts = next_ts - iter->ts; |
528 | struct trace_seq *s = &iter->seq; | |
529 | ||
530 | if (in_ns) { | |
531 | abs_ts = ns2usecs(abs_ts); | |
532 | rel_ts = ns2usecs(rel_ts); | |
533 | } | |
534 | ||
535 | if (verbose && in_ns) { | |
536 | unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); | |
537 | unsigned long abs_msec = (unsigned long)abs_ts; | |
538 | unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); | |
539 | unsigned long rel_msec = (unsigned long)rel_ts; | |
540 | ||
19a7fe20 SRRH |
541 | trace_seq_printf( |
542 | s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", | |
543 | ns2usecs(iter->ts), | |
544 | abs_msec, abs_usec, | |
545 | rel_msec, rel_usec); | |
546 | ||
8be0709f | 547 | } else if (verbose && !in_ns) { |
19a7fe20 SRRH |
548 | trace_seq_printf( |
549 | s, "[%016llx] %lld (+%lld): ", | |
550 | iter->ts, abs_ts, rel_ts); | |
551 | ||
8be0709f | 552 | } else if (!verbose && in_ns) { |
19a7fe20 SRRH |
553 | trace_seq_printf( |
554 | s, " %4lldus%c: ", | |
555 | abs_ts, | |
8e1e1df2 | 556 | trace_find_mark(rel_ts * NSEC_PER_USEC)); |
19a7fe20 | 557 | |
8be0709f | 558 | } else { /* !verbose && !in_ns */ |
19a7fe20 | 559 | trace_seq_printf(s, " %4lld: ", abs_ts); |
8be0709f | 560 | } |
19a7fe20 SRRH |
561 | |
562 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
563 | } |
564 | ||
565 | int trace_print_context(struct trace_iterator *iter) | |
566 | { | |
983f938a | 567 | struct trace_array *tr = iter->tr; |
c4a8e8be FW |
568 | struct trace_seq *s = &iter->seq; |
569 | struct trace_entry *entry = iter->ent; | |
8be0709f DS |
570 | unsigned long long t; |
571 | unsigned long secs, usec_rem; | |
4ca53085 SR |
572 | char comm[TASK_COMM_LEN]; |
573 | ||
574 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 575 | |
f8494fa3 | 576 | trace_seq_printf(s, "%16s-%-5d ", comm, entry->pid); |
77271ce4 | 577 | |
441dae8f JF |
578 | if (tr->trace_flags & TRACE_ITER_RECORD_TGID) { |
579 | unsigned int tgid = trace_find_tgid(entry->pid); | |
580 | ||
581 | if (!tgid) | |
582 | trace_seq_printf(s, "(-----) "); | |
583 | else | |
584 | trace_seq_printf(s, "(%5d) ", tgid); | |
585 | } | |
586 | ||
f8494fa3 JFG |
587 | trace_seq_printf(s, "[%03d] ", iter->cpu); |
588 | ||
983f938a | 589 | if (tr->trace_flags & TRACE_ITER_IRQ_INFO) |
19a7fe20 | 590 | trace_print_lat_fmt(s, entry); |
77271ce4 | 591 | |
8be0709f DS |
592 | if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { |
593 | t = ns2usecs(iter->ts); | |
594 | usec_rem = do_div(t, USEC_PER_SEC); | |
595 | secs = (unsigned long)t; | |
19a7fe20 | 596 | trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); |
8be0709f | 597 | } else |
19a7fe20 SRRH |
598 | trace_seq_printf(s, " %12llu: ", iter->ts); |
599 | ||
600 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
601 | } |
602 | ||
603 | int trace_print_lat_context(struct trace_iterator *iter) | |
604 | { | |
983f938a | 605 | struct trace_array *tr = iter->tr; |
db4c75cb SR |
606 | /* trace_find_next_entry will reset ent_size */ |
607 | int ent_size = iter->ent_size; | |
c4a8e8be | 608 | struct trace_seq *s = &iter->seq; |
983f938a | 609 | u64 next_ts; |
c4a8e8be FW |
610 | struct trace_entry *entry = iter->ent, |
611 | *next_entry = trace_find_next_entry(iter, NULL, | |
612 | &next_ts); | |
983f938a | 613 | unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE); |
c4a8e8be | 614 | |
db4c75cb SR |
615 | /* Restore the original ent_size */ |
616 | iter->ent_size = ent_size; | |
617 | ||
c4a8e8be FW |
618 | if (!next_entry) |
619 | next_ts = iter->ts; | |
c4a8e8be FW |
620 | |
621 | if (verbose) { | |
4ca53085 SR |
622 | char comm[TASK_COMM_LEN]; |
623 | ||
624 | trace_find_cmdline(entry->pid, comm); | |
625 | ||
19a7fe20 SRRH |
626 | trace_seq_printf( |
627 | s, "%16s %5d %3d %d %08x %08lx ", | |
628 | comm, entry->pid, iter->cpu, entry->flags, | |
629 | entry->preempt_count, iter->idx); | |
c4a8e8be | 630 | } else { |
19a7fe20 | 631 | lat_print_generic(s, entry, iter->cpu); |
c4a8e8be FW |
632 | } |
633 | ||
19a7fe20 | 634 | lat_print_timestamp(iter, next_ts); |
8be0709f | 635 | |
19a7fe20 | 636 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
637 | } |
638 | ||
f0868d1e SR |
639 | /** |
640 | * ftrace_find_event - find a registered event | |
641 | * @type: the type of event to look for | |
642 | * | |
643 | * Returns an event of type @type otherwise NULL | |
4f535968 | 644 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
645 | */ |
646 | struct trace_event *ftrace_find_event(int type) | |
647 | { | |
648 | struct trace_event *event; | |
f0868d1e SR |
649 | unsigned key; |
650 | ||
651 | key = type & (EVENT_HASHSIZE - 1); | |
652 | ||
b67bfe0d | 653 | hlist_for_each_entry(event, &event_hash[key], node) { |
f0868d1e SR |
654 | if (event->type == type) |
655 | return event; | |
656 | } | |
657 | ||
658 | return NULL; | |
659 | } | |
660 | ||
060fa5c8 SR |
661 | static LIST_HEAD(ftrace_event_list); |
662 | ||
663 | static int trace_search_list(struct list_head **list) | |
664 | { | |
665 | struct trace_event *e; | |
666 | int last = __TRACE_LAST_TYPE; | |
667 | ||
668 | if (list_empty(&ftrace_event_list)) { | |
669 | *list = &ftrace_event_list; | |
670 | return last + 1; | |
671 | } | |
672 | ||
673 | /* | |
674 | * We used up all possible max events, | |
675 | * lets see if somebody freed one. | |
676 | */ | |
677 | list_for_each_entry(e, &ftrace_event_list, list) { | |
678 | if (e->type != last + 1) | |
679 | break; | |
680 | last++; | |
681 | } | |
682 | ||
683 | /* Did we used up all 65 thousand events??? */ | |
609a7404 | 684 | if ((last + 1) > TRACE_EVENT_TYPE_MAX) |
060fa5c8 SR |
685 | return 0; |
686 | ||
687 | *list = &e->list; | |
688 | return last + 1; | |
689 | } | |
690 | ||
4f535968 LJ |
691 | void trace_event_read_lock(void) |
692 | { | |
52f6ad6d | 693 | down_read(&trace_event_sem); |
4f535968 LJ |
694 | } |
695 | ||
696 | void trace_event_read_unlock(void) | |
697 | { | |
52f6ad6d | 698 | up_read(&trace_event_sem); |
4f535968 LJ |
699 | } |
700 | ||
f0868d1e | 701 | /** |
9023c930 | 702 | * register_trace_event - register output for an event type |
f0868d1e SR |
703 | * @event: the event type to register |
704 | * | |
705 | * Event types are stored in a hash and this hash is used to | |
706 | * find a way to print an event. If the @event->type is set | |
707 | * then it will use that type, otherwise it will assign a | |
708 | * type to use. | |
709 | * | |
710 | * If you assign your own type, please make sure it is added | |
711 | * to the trace_type enum in trace.h, to avoid collisions | |
712 | * with the dynamic types. | |
713 | * | |
714 | * Returns the event type number or zero on error. | |
715 | */ | |
9023c930 | 716 | int register_trace_event(struct trace_event *event) |
f0868d1e SR |
717 | { |
718 | unsigned key; | |
719 | int ret = 0; | |
720 | ||
52f6ad6d | 721 | down_write(&trace_event_sem); |
f0868d1e | 722 | |
060fa5c8 | 723 | if (WARN_ON(!event)) |
28bea271 | 724 | goto out; |
28bea271 | 725 | |
a9a57763 SR |
726 | if (WARN_ON(!event->funcs)) |
727 | goto out; | |
728 | ||
060fa5c8 SR |
729 | INIT_LIST_HEAD(&event->list); |
730 | ||
731 | if (!event->type) { | |
48dd0fed | 732 | struct list_head *list = NULL; |
060fa5c8 | 733 | |
609a7404 | 734 | if (next_event_type > TRACE_EVENT_TYPE_MAX) { |
060fa5c8 SR |
735 | |
736 | event->type = trace_search_list(&list); | |
737 | if (!event->type) | |
738 | goto out; | |
739 | ||
740 | } else { | |
8e1e1df2 | 741 | |
060fa5c8 SR |
742 | event->type = next_event_type++; |
743 | list = &ftrace_event_list; | |
744 | } | |
745 | ||
746 | if (WARN_ON(ftrace_find_event(event->type))) | |
747 | goto out; | |
748 | ||
749 | list_add_tail(&event->list, list); | |
750 | ||
751 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
752 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
753 | WARN_ON(1); | |
f0868d1e | 754 | goto out; |
060fa5c8 SR |
755 | } else { |
756 | /* Is this event already used */ | |
757 | if (ftrace_find_event(event->type)) | |
758 | goto out; | |
759 | } | |
f0868d1e | 760 | |
a9a57763 SR |
761 | if (event->funcs->trace == NULL) |
762 | event->funcs->trace = trace_nop_print; | |
763 | if (event->funcs->raw == NULL) | |
764 | event->funcs->raw = trace_nop_print; | |
765 | if (event->funcs->hex == NULL) | |
766 | event->funcs->hex = trace_nop_print; | |
767 | if (event->funcs->binary == NULL) | |
768 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 769 | |
f0868d1e SR |
770 | key = event->type & (EVENT_HASHSIZE - 1); |
771 | ||
4f535968 | 772 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
773 | |
774 | ret = event->type; | |
775 | out: | |
52f6ad6d | 776 | up_write(&trace_event_sem); |
f0868d1e SR |
777 | |
778 | return ret; | |
779 | } | |
9023c930 | 780 | EXPORT_SYMBOL_GPL(register_trace_event); |
f0868d1e | 781 | |
110bf2b7 | 782 | /* |
52f6ad6d | 783 | * Used by module code with the trace_event_sem held for write. |
110bf2b7 | 784 | */ |
9023c930 | 785 | int __unregister_trace_event(struct trace_event *event) |
110bf2b7 SR |
786 | { |
787 | hlist_del(&event->node); | |
788 | list_del(&event->list); | |
789 | return 0; | |
790 | } | |
791 | ||
f0868d1e | 792 | /** |
9023c930 | 793 | * unregister_trace_event - remove a no longer used event |
f0868d1e SR |
794 | * @event: the event to remove |
795 | */ | |
9023c930 | 796 | int unregister_trace_event(struct trace_event *event) |
f0868d1e | 797 | { |
52f6ad6d | 798 | down_write(&trace_event_sem); |
9023c930 | 799 | __unregister_trace_event(event); |
52f6ad6d | 800 | up_write(&trace_event_sem); |
f0868d1e SR |
801 | |
802 | return 0; | |
803 | } | |
9023c930 | 804 | EXPORT_SYMBOL_GPL(unregister_trace_event); |
f633cef0 SR |
805 | |
806 | /* | |
807 | * Standard events | |
808 | */ | |
809 | ||
a9a57763 SR |
810 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
811 | struct trace_event *event) | |
f633cef0 | 812 | { |
19a7fe20 | 813 | trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type); |
ee5e51f5 | 814 | |
19a7fe20 | 815 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
816 | } |
817 | ||
818 | /* TRACE_FN */ | |
a9a57763 SR |
819 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
820 | struct trace_event *event) | |
f633cef0 SR |
821 | { |
822 | struct ftrace_entry *field; | |
2c9b238e | 823 | struct trace_seq *s = &iter->seq; |
f633cef0 | 824 | |
2c9b238e | 825 | trace_assign_type(field, iter->ent); |
f633cef0 | 826 | |
19a7fe20 | 827 | seq_print_ip_sym(s, field->ip, flags); |
f633cef0 SR |
828 | |
829 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
19a7fe20 SRRH |
830 | trace_seq_puts(s, " <-"); |
831 | seq_print_ip_sym(s, field->parent_ip, flags); | |
f633cef0 | 832 | } |
f633cef0 | 833 | |
19a7fe20 | 834 | trace_seq_putc(s, '\n'); |
f633cef0 | 835 | |
19a7fe20 | 836 | return trace_handle_return(s); |
f633cef0 SR |
837 | } |
838 | ||
a9a57763 SR |
839 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
840 | struct trace_event *event) | |
f633cef0 SR |
841 | { |
842 | struct ftrace_entry *field; | |
843 | ||
2c9b238e | 844 | trace_assign_type(field, iter->ent); |
f633cef0 | 845 | |
19a7fe20 SRRH |
846 | trace_seq_printf(&iter->seq, "%lx %lx\n", |
847 | field->ip, | |
848 | field->parent_ip); | |
f633cef0 | 849 | |
19a7fe20 | 850 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
851 | } |
852 | ||
a9a57763 SR |
853 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
854 | struct trace_event *event) | |
f633cef0 SR |
855 | { |
856 | struct ftrace_entry *field; | |
2c9b238e | 857 | struct trace_seq *s = &iter->seq; |
f633cef0 | 858 | |
2c9b238e | 859 | trace_assign_type(field, iter->ent); |
f633cef0 | 860 | |
19a7fe20 SRRH |
861 | SEQ_PUT_HEX_FIELD(s, field->ip); |
862 | SEQ_PUT_HEX_FIELD(s, field->parent_ip); | |
f633cef0 | 863 | |
19a7fe20 | 864 | return trace_handle_return(s); |
f633cef0 SR |
865 | } |
866 | ||
a9a57763 SR |
867 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
868 | struct trace_event *event) | |
f633cef0 SR |
869 | { |
870 | struct ftrace_entry *field; | |
2c9b238e | 871 | struct trace_seq *s = &iter->seq; |
f633cef0 | 872 | |
2c9b238e | 873 | trace_assign_type(field, iter->ent); |
f633cef0 | 874 | |
19a7fe20 SRRH |
875 | SEQ_PUT_FIELD(s, field->ip); |
876 | SEQ_PUT_FIELD(s, field->parent_ip); | |
f633cef0 | 877 | |
19a7fe20 | 878 | return trace_handle_return(s); |
f633cef0 SR |
879 | } |
880 | ||
a9a57763 | 881 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 882 | .trace = trace_fn_trace, |
f633cef0 SR |
883 | .raw = trace_fn_raw, |
884 | .hex = trace_fn_hex, | |
885 | .binary = trace_fn_bin, | |
886 | }; | |
887 | ||
a9a57763 SR |
888 | static struct trace_event trace_fn_event = { |
889 | .type = TRACE_FN, | |
890 | .funcs = &trace_fn_funcs, | |
891 | }; | |
892 | ||
f633cef0 | 893 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
894 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
895 | char *delim) | |
f633cef0 SR |
896 | { |
897 | struct ctx_switch_entry *field; | |
4ca53085 | 898 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
899 | int S, T; |
900 | ||
4ca53085 | 901 | |
2c9b238e | 902 | trace_assign_type(field, iter->ent); |
f633cef0 | 903 | |
1d48b080 PZ |
904 | T = task_index_to_char(field->next_state); |
905 | S = task_index_to_char(field->prev_state); | |
4ca53085 | 906 | trace_find_cmdline(field->next_pid, comm); |
19a7fe20 SRRH |
907 | trace_seq_printf(&iter->seq, |
908 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
909 | field->prev_pid, | |
910 | field->prev_prio, | |
911 | S, delim, | |
912 | field->next_cpu, | |
913 | field->next_pid, | |
914 | field->next_prio, | |
915 | T, comm); | |
916 | ||
917 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
918 | } |
919 | ||
a9a57763 SR |
920 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
921 | struct trace_event *event) | |
f633cef0 | 922 | { |
2c9b238e | 923 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
924 | } |
925 | ||
ae7462b4 | 926 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 927 | int flags, struct trace_event *event) |
f633cef0 | 928 | { |
2c9b238e | 929 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
930 | } |
931 | ||
2c9b238e | 932 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
933 | { |
934 | struct ctx_switch_entry *field; | |
935 | int T; | |
936 | ||
2c9b238e | 937 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
938 | |
939 | if (!S) | |
1d48b080 PZ |
940 | S = task_index_to_char(field->prev_state); |
941 | T = task_index_to_char(field->next_state); | |
19a7fe20 SRRH |
942 | trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
943 | field->prev_pid, | |
944 | field->prev_prio, | |
945 | S, | |
946 | field->next_cpu, | |
947 | field->next_pid, | |
948 | field->next_prio, | |
949 | T); | |
950 | ||
951 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
952 | } |
953 | ||
a9a57763 SR |
954 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
955 | struct trace_event *event) | |
f633cef0 | 956 | { |
2c9b238e | 957 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
958 | } |
959 | ||
a9a57763 SR |
960 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
961 | struct trace_event *event) | |
f633cef0 | 962 | { |
2c9b238e | 963 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
964 | } |
965 | ||
966 | ||
2c9b238e | 967 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
968 | { |
969 | struct ctx_switch_entry *field; | |
2c9b238e | 970 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
971 | int T; |
972 | ||
2c9b238e | 973 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
974 | |
975 | if (!S) | |
1d48b080 PZ |
976 | S = task_index_to_char(field->prev_state); |
977 | T = task_index_to_char(field->next_state); | |
f633cef0 | 978 | |
19a7fe20 SRRH |
979 | SEQ_PUT_HEX_FIELD(s, field->prev_pid); |
980 | SEQ_PUT_HEX_FIELD(s, field->prev_prio); | |
981 | SEQ_PUT_HEX_FIELD(s, S); | |
982 | SEQ_PUT_HEX_FIELD(s, field->next_cpu); | |
983 | SEQ_PUT_HEX_FIELD(s, field->next_pid); | |
984 | SEQ_PUT_HEX_FIELD(s, field->next_prio); | |
985 | SEQ_PUT_HEX_FIELD(s, T); | |
f633cef0 | 986 | |
19a7fe20 | 987 | return trace_handle_return(s); |
f633cef0 SR |
988 | } |
989 | ||
a9a57763 SR |
990 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
991 | struct trace_event *event) | |
f633cef0 | 992 | { |
2c9b238e | 993 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
994 | } |
995 | ||
a9a57763 SR |
996 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
997 | struct trace_event *event) | |
f633cef0 | 998 | { |
2c9b238e | 999 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
1000 | } |
1001 | ||
ae7462b4 | 1002 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 1003 | int flags, struct trace_event *event) |
f633cef0 SR |
1004 | { |
1005 | struct ctx_switch_entry *field; | |
2c9b238e | 1006 | struct trace_seq *s = &iter->seq; |
f633cef0 | 1007 | |
2c9b238e | 1008 | trace_assign_type(field, iter->ent); |
f633cef0 | 1009 | |
19a7fe20 SRRH |
1010 | SEQ_PUT_FIELD(s, field->prev_pid); |
1011 | SEQ_PUT_FIELD(s, field->prev_prio); | |
1012 | SEQ_PUT_FIELD(s, field->prev_state); | |
1013 | SEQ_PUT_FIELD(s, field->next_cpu); | |
1014 | SEQ_PUT_FIELD(s, field->next_pid); | |
1015 | SEQ_PUT_FIELD(s, field->next_prio); | |
1016 | SEQ_PUT_FIELD(s, field->next_state); | |
f633cef0 | 1017 | |
19a7fe20 | 1018 | return trace_handle_return(s); |
f633cef0 SR |
1019 | } |
1020 | ||
a9a57763 | 1021 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 1022 | .trace = trace_ctx_print, |
f633cef0 SR |
1023 | .raw = trace_ctx_raw, |
1024 | .hex = trace_ctx_hex, | |
1025 | .binary = trace_ctxwake_bin, | |
1026 | }; | |
1027 | ||
a9a57763 SR |
1028 | static struct trace_event trace_ctx_event = { |
1029 | .type = TRACE_CTX, | |
1030 | .funcs = &trace_ctx_funcs, | |
1031 | }; | |
1032 | ||
1033 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 1034 | .trace = trace_wake_print, |
f633cef0 SR |
1035 | .raw = trace_wake_raw, |
1036 | .hex = trace_wake_hex, | |
1037 | .binary = trace_ctxwake_bin, | |
1038 | }; | |
1039 | ||
a9a57763 SR |
1040 | static struct trace_event trace_wake_event = { |
1041 | .type = TRACE_WAKE, | |
1042 | .funcs = &trace_wake_funcs, | |
1043 | }; | |
1044 | ||
f633cef0 SR |
1045 | /* TRACE_STACK */ |
1046 | ||
ae7462b4 | 1047 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1048 | int flags, struct trace_event *event) |
f633cef0 SR |
1049 | { |
1050 | struct stack_entry *field; | |
2c9b238e | 1051 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1052 | unsigned long *p; |
1053 | unsigned long *end; | |
f633cef0 | 1054 | |
2c9b238e | 1055 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1056 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1057 | |
19a7fe20 | 1058 | trace_seq_puts(s, "<stack trace>\n"); |
4a9bd3f1 | 1059 | |
becf33f6 | 1060 | for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) { |
f633cef0 | 1061 | |
19a7fe20 SRRH |
1062 | if (trace_seq_has_overflowed(s)) |
1063 | break; | |
f633cef0 | 1064 | |
19a7fe20 SRRH |
1065 | trace_seq_puts(s, " => "); |
1066 | seq_print_ip_sym(s, *p, flags); | |
1067 | trace_seq_putc(s, '\n'); | |
1068 | } | |
f633cef0 | 1069 | |
19a7fe20 | 1070 | return trace_handle_return(s); |
f633cef0 SR |
1071 | } |
1072 | ||
a9a57763 | 1073 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1074 | .trace = trace_stack_print, |
f633cef0 SR |
1075 | }; |
1076 | ||
a9a57763 SR |
1077 | static struct trace_event trace_stack_event = { |
1078 | .type = TRACE_STACK, | |
1079 | .funcs = &trace_stack_funcs, | |
1080 | }; | |
1081 | ||
f633cef0 | 1082 | /* TRACE_USER_STACK */ |
ae7462b4 | 1083 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1084 | int flags, struct trace_event *event) |
f633cef0 | 1085 | { |
983f938a | 1086 | struct trace_array *tr = iter->tr; |
f633cef0 | 1087 | struct userstack_entry *field; |
2c9b238e | 1088 | struct trace_seq *s = &iter->seq; |
6b1032d5 SRRH |
1089 | struct mm_struct *mm = NULL; |
1090 | unsigned int i; | |
f633cef0 | 1091 | |
2c9b238e | 1092 | trace_assign_type(field, iter->ent); |
f633cef0 | 1093 | |
19a7fe20 | 1094 | trace_seq_puts(s, "<user stack trace>\n"); |
6b1032d5 | 1095 | |
983f938a | 1096 | if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) { |
6b1032d5 SRRH |
1097 | struct task_struct *task; |
1098 | /* | |
1099 | * we do the lookup on the thread group leader, | |
1100 | * since individual threads might have already quit! | |
1101 | */ | |
1102 | rcu_read_lock(); | |
1103 | task = find_task_by_vpid(field->tgid); | |
1104 | if (task) | |
1105 | mm = get_task_mm(task); | |
1106 | rcu_read_unlock(); | |
1107 | } | |
1108 | ||
1109 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
1110 | unsigned long ip = field->caller[i]; | |
1111 | ||
6d54ceb5 | 1112 | if (!ip || trace_seq_has_overflowed(s)) |
6b1032d5 SRRH |
1113 | break; |
1114 | ||
1115 | trace_seq_puts(s, " => "); | |
6b1032d5 SRRH |
1116 | seq_print_user_ip(s, mm, ip, flags); |
1117 | trace_seq_putc(s, '\n'); | |
1118 | } | |
1119 | ||
1120 | if (mm) | |
1121 | mmput(mm); | |
f633cef0 | 1122 | |
19a7fe20 | 1123 | return trace_handle_return(s); |
f633cef0 SR |
1124 | } |
1125 | ||
a9a57763 | 1126 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1127 | .trace = trace_user_stack_print, |
f633cef0 SR |
1128 | }; |
1129 | ||
a9a57763 SR |
1130 | static struct trace_event trace_user_stack_event = { |
1131 | .type = TRACE_USER_STACK, | |
1132 | .funcs = &trace_user_stack_funcs, | |
1133 | }; | |
1134 | ||
e7c15cd8 SRRH |
1135 | /* TRACE_HWLAT */ |
1136 | static enum print_line_t | |
1137 | trace_hwlat_print(struct trace_iterator *iter, int flags, | |
1138 | struct trace_event *event) | |
1139 | { | |
1140 | struct trace_entry *entry = iter->ent; | |
1141 | struct trace_seq *s = &iter->seq; | |
1142 | struct hwlat_entry *field; | |
1143 | ||
1144 | trace_assign_type(field, entry); | |
1145 | ||
51aad0ae | 1146 | trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld", |
e7c15cd8 SRRH |
1147 | field->seqnum, |
1148 | field->duration, | |
1149 | field->outer_duration, | |
51aad0ae | 1150 | (long long)field->timestamp.tv_sec, |
e7c15cd8 SRRH |
1151 | field->timestamp.tv_nsec); |
1152 | ||
7b2c8625 SRRH |
1153 | if (field->nmi_count) { |
1154 | /* | |
1155 | * The generic sched_clock() is not NMI safe, thus | |
1156 | * we only record the count and not the time. | |
1157 | */ | |
1158 | if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK)) | |
1159 | trace_seq_printf(s, " nmi-total:%llu", | |
1160 | field->nmi_total_ts); | |
1161 | trace_seq_printf(s, " nmi-count:%u", | |
1162 | field->nmi_count); | |
1163 | } | |
1164 | ||
1165 | trace_seq_putc(s, '\n'); | |
1166 | ||
e7c15cd8 SRRH |
1167 | return trace_handle_return(s); |
1168 | } | |
1169 | ||
1170 | ||
1171 | static enum print_line_t | |
1172 | trace_hwlat_raw(struct trace_iterator *iter, int flags, | |
1173 | struct trace_event *event) | |
1174 | { | |
1175 | struct hwlat_entry *field; | |
1176 | struct trace_seq *s = &iter->seq; | |
1177 | ||
1178 | trace_assign_type(field, iter->ent); | |
1179 | ||
51aad0ae | 1180 | trace_seq_printf(s, "%llu %lld %lld %09ld %u\n", |
e7c15cd8 SRRH |
1181 | field->duration, |
1182 | field->outer_duration, | |
51aad0ae | 1183 | (long long)field->timestamp.tv_sec, |
e7c15cd8 SRRH |
1184 | field->timestamp.tv_nsec, |
1185 | field->seqnum); | |
1186 | ||
1187 | return trace_handle_return(s); | |
1188 | } | |
1189 | ||
1190 | static struct trace_event_functions trace_hwlat_funcs = { | |
1191 | .trace = trace_hwlat_print, | |
1192 | .raw = trace_hwlat_raw, | |
1193 | }; | |
1194 | ||
1195 | static struct trace_event trace_hwlat_event = { | |
1196 | .type = TRACE_HWLAT, | |
1197 | .funcs = &trace_hwlat_funcs, | |
1198 | }; | |
1199 | ||
09ae7234 SRRH |
1200 | /* TRACE_BPUTS */ |
1201 | static enum print_line_t | |
1202 | trace_bputs_print(struct trace_iterator *iter, int flags, | |
1203 | struct trace_event *event) | |
1204 | { | |
1205 | struct trace_entry *entry = iter->ent; | |
1206 | struct trace_seq *s = &iter->seq; | |
1207 | struct bputs_entry *field; | |
1208 | ||
1209 | trace_assign_type(field, entry); | |
1210 | ||
19a7fe20 SRRH |
1211 | seq_print_ip_sym(s, field->ip, flags); |
1212 | trace_seq_puts(s, ": "); | |
1213 | trace_seq_puts(s, field->str); | |
09ae7234 | 1214 | |
19a7fe20 | 1215 | return trace_handle_return(s); |
09ae7234 SRRH |
1216 | } |
1217 | ||
1218 | ||
1219 | static enum print_line_t | |
1220 | trace_bputs_raw(struct trace_iterator *iter, int flags, | |
1221 | struct trace_event *event) | |
1222 | { | |
1223 | struct bputs_entry *field; | |
1224 | struct trace_seq *s = &iter->seq; | |
1225 | ||
1226 | trace_assign_type(field, iter->ent); | |
1227 | ||
19a7fe20 SRRH |
1228 | trace_seq_printf(s, ": %lx : ", field->ip); |
1229 | trace_seq_puts(s, field->str); | |
09ae7234 | 1230 | |
19a7fe20 | 1231 | return trace_handle_return(s); |
09ae7234 SRRH |
1232 | } |
1233 | ||
1234 | static struct trace_event_functions trace_bputs_funcs = { | |
1235 | .trace = trace_bputs_print, | |
1236 | .raw = trace_bputs_raw, | |
1237 | }; | |
1238 | ||
1239 | static struct trace_event trace_bputs_event = { | |
1240 | .type = TRACE_BPUTS, | |
1241 | .funcs = &trace_bputs_funcs, | |
1242 | }; | |
1243 | ||
48ead020 | 1244 | /* TRACE_BPRINT */ |
1427cdf0 | 1245 | static enum print_line_t |
a9a57763 SR |
1246 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1247 | struct trace_event *event) | |
1427cdf0 LJ |
1248 | { |
1249 | struct trace_entry *entry = iter->ent; | |
1250 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1251 | struct bprint_entry *field; |
1427cdf0 LJ |
1252 | |
1253 | trace_assign_type(field, entry); | |
1254 | ||
19a7fe20 SRRH |
1255 | seq_print_ip_sym(s, field->ip, flags); |
1256 | trace_seq_puts(s, ": "); | |
1257 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1258 | |
19a7fe20 | 1259 | return trace_handle_return(s); |
1427cdf0 LJ |
1260 | } |
1261 | ||
769b0441 | 1262 | |
48ead020 | 1263 | static enum print_line_t |
a9a57763 SR |
1264 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1265 | struct trace_event *event) | |
1427cdf0 | 1266 | { |
48ead020 | 1267 | struct bprint_entry *field; |
1427cdf0 | 1268 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1269 | |
769b0441 | 1270 | trace_assign_type(field, iter->ent); |
1427cdf0 | 1271 | |
19a7fe20 SRRH |
1272 | trace_seq_printf(s, ": %lx : ", field->ip); |
1273 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1274 | |
19a7fe20 | 1275 | return trace_handle_return(s); |
1427cdf0 LJ |
1276 | } |
1277 | ||
a9a57763 SR |
1278 | static struct trace_event_functions trace_bprint_funcs = { |
1279 | .trace = trace_bprint_print, | |
1280 | .raw = trace_bprint_raw, | |
1281 | }; | |
769b0441 | 1282 | |
48ead020 FW |
1283 | static struct trace_event trace_bprint_event = { |
1284 | .type = TRACE_BPRINT, | |
a9a57763 | 1285 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1286 | }; |
1287 | ||
1288 | /* TRACE_PRINT */ | |
1289 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1290 | int flags, struct trace_event *event) |
48ead020 FW |
1291 | { |
1292 | struct print_entry *field; | |
1293 | struct trace_seq *s = &iter->seq; | |
1294 | ||
1295 | trace_assign_type(field, iter->ent); | |
1296 | ||
19a7fe20 SRRH |
1297 | seq_print_ip_sym(s, field->ip, flags); |
1298 | trace_seq_printf(s, ": %s", field->buf); | |
48ead020 | 1299 | |
19a7fe20 | 1300 | return trace_handle_return(s); |
48ead020 FW |
1301 | } |
1302 | ||
a9a57763 SR |
1303 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1304 | struct trace_event *event) | |
48ead020 FW |
1305 | { |
1306 | struct print_entry *field; | |
1307 | ||
1308 | trace_assign_type(field, iter->ent); | |
1309 | ||
19a7fe20 | 1310 | trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf); |
48ead020 | 1311 | |
19a7fe20 | 1312 | return trace_handle_return(&iter->seq); |
48ead020 FW |
1313 | } |
1314 | ||
a9a57763 | 1315 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1316 | .trace = trace_print_print, |
1317 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1318 | }; |
1319 | ||
a9a57763 SR |
1320 | static struct trace_event trace_print_event = { |
1321 | .type = TRACE_PRINT, | |
1322 | .funcs = &trace_print_funcs, | |
1323 | }; | |
1324 | ||
fa32e855 SR |
1325 | static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags, |
1326 | struct trace_event *event) | |
1327 | { | |
1328 | struct raw_data_entry *field; | |
1329 | int i; | |
1330 | ||
1331 | trace_assign_type(field, iter->ent); | |
1332 | ||
1333 | trace_seq_printf(&iter->seq, "# %x buf:", field->id); | |
1334 | ||
1335 | for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++) | |
1336 | trace_seq_printf(&iter->seq, " %02x", | |
1337 | (unsigned char)field->buf[i]); | |
1338 | ||
1339 | trace_seq_putc(&iter->seq, '\n'); | |
1340 | ||
1341 | return trace_handle_return(&iter->seq); | |
1342 | } | |
1343 | ||
1344 | static struct trace_event_functions trace_raw_data_funcs = { | |
1345 | .trace = trace_raw_data, | |
1346 | .raw = trace_raw_data, | |
1347 | }; | |
1348 | ||
1349 | static struct trace_event trace_raw_data_event = { | |
1350 | .type = TRACE_RAW_DATA, | |
1351 | .funcs = &trace_raw_data_funcs, | |
1352 | }; | |
1353 | ||
48ead020 | 1354 | |
f633cef0 SR |
1355 | static struct trace_event *events[] __initdata = { |
1356 | &trace_fn_event, | |
1357 | &trace_ctx_event, | |
1358 | &trace_wake_event, | |
f633cef0 SR |
1359 | &trace_stack_event, |
1360 | &trace_user_stack_event, | |
09ae7234 | 1361 | &trace_bputs_event, |
48ead020 | 1362 | &trace_bprint_event, |
f633cef0 | 1363 | &trace_print_event, |
e7c15cd8 | 1364 | &trace_hwlat_event, |
fa32e855 | 1365 | &trace_raw_data_event, |
f633cef0 SR |
1366 | NULL |
1367 | }; | |
1368 | ||
1369 | __init static int init_events(void) | |
1370 | { | |
1371 | struct trace_event *event; | |
1372 | int i, ret; | |
1373 | ||
1374 | for (i = 0; events[i]; i++) { | |
1375 | event = events[i]; | |
1376 | ||
9023c930 | 1377 | ret = register_trace_event(event); |
f633cef0 SR |
1378 | if (!ret) { |
1379 | printk(KERN_WARNING "event %d failed to register\n", | |
1380 | event->type); | |
1381 | WARN_ON_ONCE(1); | |
1382 | } | |
1383 | } | |
1384 | ||
1385 | return 0; | |
1386 | } | |
7374e827 | 1387 | early_initcall(init_events); |