Commit | Line | Data |
---|---|---|
f0868d1e SR |
1 | /* |
2 | * trace_output.c | |
3 | * | |
4 | * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/mutex.h> | |
10 | #include <linux/ftrace.h> | |
11 | ||
12 | #include "trace_output.h" | |
13 | ||
14 | /* must be a power of 2 */ | |
15 | #define EVENT_HASHSIZE 128 | |
16 | ||
52f6ad6d | 17 | DECLARE_RWSEM(trace_event_sem); |
be74b73a | 18 | |
f0868d1e SR |
19 | static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; |
20 | ||
21 | static int next_event_type = __TRACE_LAST_TYPE + 1; | |
22 | ||
09ae7234 SRRH |
23 | enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter) |
24 | { | |
25 | struct trace_seq *s = &iter->seq; | |
26 | struct trace_entry *entry = iter->ent; | |
27 | struct bputs_entry *field; | |
09ae7234 SRRH |
28 | |
29 | trace_assign_type(field, entry); | |
30 | ||
19a7fe20 | 31 | trace_seq_puts(s, field->str); |
09ae7234 | 32 | |
19a7fe20 | 33 | return trace_handle_return(s); |
09ae7234 SRRH |
34 | } |
35 | ||
5ef841f6 SR |
36 | enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) |
37 | { | |
38 | struct trace_seq *s = &iter->seq; | |
39 | struct trace_entry *entry = iter->ent; | |
40 | struct bprint_entry *field; | |
5ef841f6 SR |
41 | |
42 | trace_assign_type(field, entry); | |
43 | ||
19a7fe20 | 44 | trace_seq_bprintf(s, field->fmt, field->buf); |
5ef841f6 | 45 | |
19a7fe20 | 46 | return trace_handle_return(s); |
5ef841f6 SR |
47 | } |
48 | ||
49 | enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) | |
50 | { | |
51 | struct trace_seq *s = &iter->seq; | |
52 | struct trace_entry *entry = iter->ent; | |
53 | struct print_entry *field; | |
5ef841f6 SR |
54 | |
55 | trace_assign_type(field, entry); | |
56 | ||
19a7fe20 | 57 | trace_seq_puts(s, field->buf); |
5ef841f6 | 58 | |
19a7fe20 | 59 | return trace_handle_return(s); |
5ef841f6 SR |
60 | } |
61 | ||
be74b73a | 62 | const char * |
645df987 SRRH |
63 | trace_print_flags_seq(struct trace_seq *p, const char *delim, |
64 | unsigned long flags, | |
65 | const struct trace_print_flags *flag_array) | |
be74b73a SR |
66 | { |
67 | unsigned long mask; | |
68 | const char *str; | |
7b039cb4 | 69 | const char *ret = trace_seq_buffer_ptr(p); |
e404b321 | 70 | int i, first = 1; |
be74b73a | 71 | |
be74b73a SR |
72 | for (i = 0; flag_array[i].name && flags; i++) { |
73 | ||
74 | mask = flag_array[i].mask; | |
75 | if ((flags & mask) != mask) | |
76 | continue; | |
77 | ||
78 | str = flag_array[i].name; | |
79 | flags &= ~mask; | |
e404b321 | 80 | if (!first && delim) |
be74b73a | 81 | trace_seq_puts(p, delim); |
e404b321 AV |
82 | else |
83 | first = 0; | |
be74b73a SR |
84 | trace_seq_puts(p, str); |
85 | } | |
86 | ||
87 | /* check for left over flags */ | |
88 | if (flags) { | |
5b349261 | 89 | if (!first && delim) |
be74b73a SR |
90 | trace_seq_puts(p, delim); |
91 | trace_seq_printf(p, "0x%lx", flags); | |
92 | } | |
93 | ||
94 | trace_seq_putc(p, 0); | |
95 | ||
56d8bd3f | 96 | return ret; |
be74b73a | 97 | } |
645df987 | 98 | EXPORT_SYMBOL(trace_print_flags_seq); |
be74b73a | 99 | |
0f4fc29d | 100 | const char * |
645df987 SRRH |
101 | trace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
102 | const struct trace_print_flags *symbol_array) | |
0f4fc29d SR |
103 | { |
104 | int i; | |
7b039cb4 | 105 | const char *ret = trace_seq_buffer_ptr(p); |
0f4fc29d SR |
106 | |
107 | for (i = 0; symbol_array[i].name; i++) { | |
108 | ||
109 | if (val != symbol_array[i].mask) | |
110 | continue; | |
111 | ||
112 | trace_seq_puts(p, symbol_array[i].name); | |
113 | break; | |
114 | } | |
115 | ||
7b039cb4 | 116 | if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
0f4fc29d | 117 | trace_seq_printf(p, "0x%lx", val); |
8e1e1df2 | 118 | |
0f4fc29d SR |
119 | trace_seq_putc(p, 0); |
120 | ||
56d8bd3f | 121 | return ret; |
0f4fc29d | 122 | } |
645df987 | 123 | EXPORT_SYMBOL(trace_print_symbols_seq); |
0f4fc29d | 124 | |
2fc1b6f0 | 125 | #if BITS_PER_LONG == 32 |
126 | const char * | |
645df987 | 127 | trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, |
2fc1b6f0 | 128 | const struct trace_print_flags_u64 *symbol_array) |
129 | { | |
130 | int i; | |
7b039cb4 | 131 | const char *ret = trace_seq_buffer_ptr(p); |
2fc1b6f0 | 132 | |
133 | for (i = 0; symbol_array[i].name; i++) { | |
134 | ||
135 | if (val != symbol_array[i].mask) | |
136 | continue; | |
137 | ||
138 | trace_seq_puts(p, symbol_array[i].name); | |
139 | break; | |
140 | } | |
141 | ||
7b039cb4 | 142 | if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
2fc1b6f0 | 143 | trace_seq_printf(p, "0x%llx", val); |
144 | ||
145 | trace_seq_putc(p, 0); | |
146 | ||
147 | return ret; | |
148 | } | |
645df987 | 149 | EXPORT_SYMBOL(trace_print_symbols_seq_u64); |
2fc1b6f0 | 150 | #endif |
151 | ||
4449bf92 | 152 | const char * |
645df987 SRRH |
153 | trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, |
154 | unsigned int bitmask_size) | |
4449bf92 | 155 | { |
7b039cb4 | 156 | const char *ret = trace_seq_buffer_ptr(p); |
4449bf92 SRRH |
157 | |
158 | trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8); | |
159 | trace_seq_putc(p, 0); | |
160 | ||
161 | return ret; | |
162 | } | |
645df987 | 163 | EXPORT_SYMBOL_GPL(trace_print_bitmask_seq); |
4449bf92 | 164 | |
5a2e3995 | 165 | const char * |
645df987 | 166 | trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) |
5a2e3995 KT |
167 | { |
168 | int i; | |
7b039cb4 | 169 | const char *ret = trace_seq_buffer_ptr(p); |
5a2e3995 KT |
170 | |
171 | for (i = 0; i < buf_len; i++) | |
172 | trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]); | |
173 | ||
174 | trace_seq_putc(p, 0); | |
175 | ||
176 | return ret; | |
177 | } | |
645df987 | 178 | EXPORT_SYMBOL(trace_print_hex_seq); |
5a2e3995 | 179 | |
6ea22486 | 180 | const char * |
645df987 SRRH |
181 | trace_print_array_seq(struct trace_seq *p, const void *buf, int count, |
182 | size_t el_size) | |
6ea22486 DM |
183 | { |
184 | const char *ret = trace_seq_buffer_ptr(p); | |
185 | const char *prefix = ""; | |
186 | void *ptr = (void *)buf; | |
ac01ce14 | 187 | size_t buf_len = count * el_size; |
6ea22486 DM |
188 | |
189 | trace_seq_putc(p, '{'); | |
190 | ||
191 | while (ptr < buf + buf_len) { | |
192 | switch (el_size) { | |
193 | case 1: | |
194 | trace_seq_printf(p, "%s0x%x", prefix, | |
195 | *(u8 *)ptr); | |
196 | break; | |
197 | case 2: | |
198 | trace_seq_printf(p, "%s0x%x", prefix, | |
199 | *(u16 *)ptr); | |
200 | break; | |
201 | case 4: | |
202 | trace_seq_printf(p, "%s0x%x", prefix, | |
203 | *(u32 *)ptr); | |
204 | break; | |
205 | case 8: | |
206 | trace_seq_printf(p, "%s0x%llx", prefix, | |
207 | *(u64 *)ptr); | |
208 | break; | |
209 | default: | |
210 | trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size, | |
211 | *(u8 *)ptr); | |
212 | el_size = 1; | |
213 | } | |
214 | prefix = ","; | |
215 | ptr += el_size; | |
216 | } | |
217 | ||
218 | trace_seq_putc(p, '}'); | |
219 | trace_seq_putc(p, 0); | |
220 | ||
221 | return ret; | |
222 | } | |
645df987 | 223 | EXPORT_SYMBOL(trace_print_array_seq); |
6ea22486 | 224 | |
892c505a SRRH |
225 | int trace_raw_output_prep(struct trace_iterator *iter, |
226 | struct trace_event *trace_event) | |
f71130de | 227 | { |
2425bcb9 | 228 | struct trace_event_call *event; |
f71130de LZ |
229 | struct trace_seq *s = &iter->seq; |
230 | struct trace_seq *p = &iter->tmp_seq; | |
231 | struct trace_entry *entry; | |
f71130de | 232 | |
2425bcb9 | 233 | event = container_of(trace_event, struct trace_event_call, event); |
f71130de LZ |
234 | entry = iter->ent; |
235 | ||
236 | if (entry->type != event->event.type) { | |
237 | WARN_ON_ONCE(1); | |
238 | return TRACE_TYPE_UNHANDLED; | |
239 | } | |
240 | ||
241 | trace_seq_init(p); | |
687fcc4a | 242 | trace_seq_printf(s, "%s: ", trace_event_name(event)); |
19a7fe20 | 243 | |
8e2e095c | 244 | return trace_handle_return(s); |
f71130de | 245 | } |
892c505a | 246 | EXPORT_SYMBOL(trace_raw_output_prep); |
f71130de | 247 | |
892c505a SRRH |
248 | static int trace_output_raw(struct trace_iterator *iter, char *name, |
249 | char *fmt, va_list ap) | |
1d6bae96 SR |
250 | { |
251 | struct trace_seq *s = &iter->seq; | |
1d6bae96 | 252 | |
19a7fe20 SRRH |
253 | trace_seq_printf(s, "%s: ", name); |
254 | trace_seq_vprintf(s, fmt, ap); | |
1d6bae96 | 255 | |
19a7fe20 | 256 | return trace_handle_return(s); |
1d6bae96 SR |
257 | } |
258 | ||
892c505a | 259 | int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...) |
1d6bae96 SR |
260 | { |
261 | va_list ap; | |
262 | int ret; | |
263 | ||
264 | va_start(ap, fmt); | |
892c505a | 265 | ret = trace_output_raw(iter, name, fmt, ap); |
1d6bae96 SR |
266 | va_end(ap); |
267 | ||
268 | return ret; | |
269 | } | |
892c505a | 270 | EXPORT_SYMBOL_GPL(trace_output_call); |
1d6bae96 | 271 | |
f0868d1e SR |
272 | #ifdef CONFIG_KRETPROBES |
273 | static inline const char *kretprobed(const char *name) | |
274 | { | |
275 | static const char tramp_name[] = "kretprobe_trampoline"; | |
276 | int size = sizeof(tramp_name); | |
277 | ||
278 | if (strncmp(tramp_name, name, size) == 0) | |
279 | return "[unknown/kretprobe'd]"; | |
280 | return name; | |
281 | } | |
282 | #else | |
283 | static inline const char *kretprobed(const char *name) | |
284 | { | |
285 | return name; | |
286 | } | |
287 | #endif /* CONFIG_KRETPROBES */ | |
288 | ||
19a7fe20 | 289 | static void |
f0868d1e SR |
290 | seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) |
291 | { | |
292 | #ifdef CONFIG_KALLSYMS | |
293 | char str[KSYM_SYMBOL_LEN]; | |
294 | const char *name; | |
295 | ||
296 | kallsyms_lookup(address, NULL, NULL, NULL, str); | |
297 | ||
298 | name = kretprobed(str); | |
299 | ||
19a7fe20 | 300 | trace_seq_printf(s, fmt, name); |
f0868d1e | 301 | #endif |
f0868d1e SR |
302 | } |
303 | ||
19a7fe20 | 304 | static void |
f0868d1e SR |
305 | seq_print_sym_offset(struct trace_seq *s, const char *fmt, |
306 | unsigned long address) | |
307 | { | |
308 | #ifdef CONFIG_KALLSYMS | |
309 | char str[KSYM_SYMBOL_LEN]; | |
310 | const char *name; | |
311 | ||
312 | sprint_symbol(str, address); | |
313 | name = kretprobed(str); | |
314 | ||
19a7fe20 | 315 | trace_seq_printf(s, fmt, name); |
f0868d1e | 316 | #endif |
f0868d1e SR |
317 | } |
318 | ||
319 | #ifndef CONFIG_64BIT | |
320 | # define IP_FMT "%08lx" | |
321 | #else | |
322 | # define IP_FMT "%016lx" | |
323 | #endif | |
324 | ||
ef92480a SRRH |
325 | static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, |
326 | unsigned long ip, unsigned long sym_flags) | |
f0868d1e SR |
327 | { |
328 | struct file *file = NULL; | |
329 | unsigned long vmstart = 0; | |
330 | int ret = 1; | |
331 | ||
d184b31c JB |
332 | if (s->full) |
333 | return 0; | |
334 | ||
f0868d1e SR |
335 | if (mm) { |
336 | const struct vm_area_struct *vma; | |
337 | ||
338 | down_read(&mm->mmap_sem); | |
339 | vma = find_vma(mm, ip); | |
340 | if (vma) { | |
341 | file = vma->vm_file; | |
342 | vmstart = vma->vm_start; | |
343 | } | |
344 | if (file) { | |
345 | ret = trace_seq_path(s, &file->f_path); | |
346 | if (ret) | |
19a7fe20 SRRH |
347 | trace_seq_printf(s, "[+0x%lx]", |
348 | ip - vmstart); | |
f0868d1e SR |
349 | } |
350 | up_read(&mm->mmap_sem); | |
351 | } | |
352 | if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) | |
19a7fe20 SRRH |
353 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
354 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
355 | } |
356 | ||
f0868d1e SR |
357 | int |
358 | seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) | |
359 | { | |
19a7fe20 SRRH |
360 | if (!ip) { |
361 | trace_seq_putc(s, '0'); | |
362 | goto out; | |
363 | } | |
f0868d1e SR |
364 | |
365 | if (sym_flags & TRACE_ITER_SYM_OFFSET) | |
19a7fe20 | 366 | seq_print_sym_offset(s, "%s", ip); |
f0868d1e | 367 | else |
19a7fe20 | 368 | seq_print_sym_short(s, "%s", ip); |
f0868d1e SR |
369 | |
370 | if (sym_flags & TRACE_ITER_SYM_ADDR) | |
19a7fe20 SRRH |
371 | trace_seq_printf(s, " <" IP_FMT ">", ip); |
372 | ||
373 | out: | |
374 | return !trace_seq_has_overflowed(s); | |
f0868d1e SR |
375 | } |
376 | ||
f81c972d SR |
377 | /** |
378 | * trace_print_lat_fmt - print the irq, preempt and lockdep fields | |
379 | * @s: trace seq struct to write to | |
380 | * @entry: The trace entry field from the ring buffer | |
381 | * | |
382 | * Prints the generic fields of irqs off, in hard or softirq, preempt | |
e6e1e259 | 383 | * count. |
f81c972d SR |
384 | */ |
385 | int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) | |
c4a8e8be | 386 | { |
10da37a6 DS |
387 | char hardsoft_irq; |
388 | char need_resched; | |
389 | char irqs_off; | |
390 | int hardirq; | |
391 | int softirq; | |
7e6867bf | 392 | int nmi; |
c4a8e8be | 393 | |
7e6867bf | 394 | nmi = entry->flags & TRACE_FLAG_NMI; |
c4a8e8be FW |
395 | hardirq = entry->flags & TRACE_FLAG_HARDIRQ; |
396 | softirq = entry->flags & TRACE_FLAG_SOFTIRQ; | |
d9793bd8 | 397 | |
10da37a6 DS |
398 | irqs_off = |
399 | (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : | |
400 | (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : | |
401 | '.'; | |
e5137b50 PZ |
402 | |
403 | switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | | |
404 | TRACE_FLAG_PREEMPT_RESCHED)) { | |
405 | case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: | |
406 | need_resched = 'N'; | |
407 | break; | |
408 | case TRACE_FLAG_NEED_RESCHED: | |
409 | need_resched = 'n'; | |
410 | break; | |
411 | case TRACE_FLAG_PREEMPT_RESCHED: | |
412 | need_resched = 'p'; | |
413 | break; | |
414 | default: | |
415 | need_resched = '.'; | |
416 | break; | |
417 | } | |
418 | ||
10da37a6 | 419 | hardsoft_irq = |
7e6867bf PZ |
420 | (nmi && hardirq) ? 'Z' : |
421 | nmi ? 'z' : | |
10da37a6 | 422 | (hardirq && softirq) ? 'H' : |
7e6867bf PZ |
423 | hardirq ? 'h' : |
424 | softirq ? 's' : | |
425 | '.' ; | |
10da37a6 | 426 | |
19a7fe20 SRRH |
427 | trace_seq_printf(s, "%c%c%c", |
428 | irqs_off, need_resched, hardsoft_irq); | |
c4a8e8be | 429 | |
829b876d | 430 | if (entry->preempt_count) |
19a7fe20 | 431 | trace_seq_printf(s, "%x", entry->preempt_count); |
637e7e86 | 432 | else |
19a7fe20 | 433 | trace_seq_putc(s, '.'); |
829b876d | 434 | |
19a7fe20 | 435 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
436 | } |
437 | ||
f81c972d SR |
438 | static int |
439 | lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) | |
440 | { | |
441 | char comm[TASK_COMM_LEN]; | |
442 | ||
443 | trace_find_cmdline(entry->pid, comm); | |
444 | ||
19a7fe20 SRRH |
445 | trace_seq_printf(s, "%8.8s-%-5d %3d", |
446 | comm, entry->pid, cpu); | |
f81c972d SR |
447 | |
448 | return trace_print_lat_fmt(s, entry); | |
449 | } | |
450 | ||
8e1e1df2 BP |
451 | #undef MARK |
452 | #define MARK(v, s) {.val = v, .sym = s} | |
453 | /* trace overhead mark */ | |
454 | static const struct trace_mark { | |
455 | unsigned long long val; /* unit: nsec */ | |
456 | char sym; | |
457 | } mark[] = { | |
458 | MARK(1000000000ULL , '$'), /* 1 sec */ | |
b838e1d9 JL |
459 | MARK(100000000ULL , '@'), /* 100 msec */ |
460 | MARK(10000000ULL , '*'), /* 10 msec */ | |
8e1e1df2 BP |
461 | MARK(1000000ULL , '#'), /* 1000 usecs */ |
462 | MARK(100000ULL , '!'), /* 100 usecs */ | |
463 | MARK(10000ULL , '+'), /* 10 usecs */ | |
464 | }; | |
465 | #undef MARK | |
466 | ||
467 | char trace_find_mark(unsigned long long d) | |
468 | { | |
469 | int i; | |
470 | int size = ARRAY_SIZE(mark); | |
471 | ||
472 | for (i = 0; i < size; i++) { | |
b838e1d9 | 473 | if (d > mark[i].val) |
8e1e1df2 BP |
474 | break; |
475 | } | |
476 | ||
477 | return (i == size) ? ' ' : mark[i].sym; | |
478 | } | |
c4a8e8be | 479 | |
d9793bd8 | 480 | static int |
8be0709f | 481 | lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
c4a8e8be | 482 | { |
983f938a SRRH |
483 | struct trace_array *tr = iter->tr; |
484 | unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE; | |
8be0709f | 485 | unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; |
12883efb | 486 | unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start; |
8be0709f DS |
487 | unsigned long long rel_ts = next_ts - iter->ts; |
488 | struct trace_seq *s = &iter->seq; | |
489 | ||
490 | if (in_ns) { | |
491 | abs_ts = ns2usecs(abs_ts); | |
492 | rel_ts = ns2usecs(rel_ts); | |
493 | } | |
494 | ||
495 | if (verbose && in_ns) { | |
496 | unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); | |
497 | unsigned long abs_msec = (unsigned long)abs_ts; | |
498 | unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); | |
499 | unsigned long rel_msec = (unsigned long)rel_ts; | |
500 | ||
19a7fe20 SRRH |
501 | trace_seq_printf( |
502 | s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", | |
503 | ns2usecs(iter->ts), | |
504 | abs_msec, abs_usec, | |
505 | rel_msec, rel_usec); | |
506 | ||
8be0709f | 507 | } else if (verbose && !in_ns) { |
19a7fe20 SRRH |
508 | trace_seq_printf( |
509 | s, "[%016llx] %lld (+%lld): ", | |
510 | iter->ts, abs_ts, rel_ts); | |
511 | ||
8be0709f | 512 | } else if (!verbose && in_ns) { |
19a7fe20 SRRH |
513 | trace_seq_printf( |
514 | s, " %4lldus%c: ", | |
515 | abs_ts, | |
8e1e1df2 | 516 | trace_find_mark(rel_ts * NSEC_PER_USEC)); |
19a7fe20 | 517 | |
8be0709f | 518 | } else { /* !verbose && !in_ns */ |
19a7fe20 | 519 | trace_seq_printf(s, " %4lld: ", abs_ts); |
8be0709f | 520 | } |
19a7fe20 SRRH |
521 | |
522 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
523 | } |
524 | ||
525 | int trace_print_context(struct trace_iterator *iter) | |
526 | { | |
983f938a | 527 | struct trace_array *tr = iter->tr; |
c4a8e8be FW |
528 | struct trace_seq *s = &iter->seq; |
529 | struct trace_entry *entry = iter->ent; | |
8be0709f DS |
530 | unsigned long long t; |
531 | unsigned long secs, usec_rem; | |
4ca53085 SR |
532 | char comm[TASK_COMM_LEN]; |
533 | ||
534 | trace_find_cmdline(entry->pid, comm); | |
c4a8e8be | 535 | |
19a7fe20 | 536 | trace_seq_printf(s, "%16s-%-5d [%03d] ", |
77271ce4 | 537 | comm, entry->pid, iter->cpu); |
77271ce4 | 538 | |
983f938a | 539 | if (tr->trace_flags & TRACE_ITER_IRQ_INFO) |
19a7fe20 | 540 | trace_print_lat_fmt(s, entry); |
77271ce4 | 541 | |
8be0709f DS |
542 | if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { |
543 | t = ns2usecs(iter->ts); | |
544 | usec_rem = do_div(t, USEC_PER_SEC); | |
545 | secs = (unsigned long)t; | |
19a7fe20 | 546 | trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); |
8be0709f | 547 | } else |
19a7fe20 SRRH |
548 | trace_seq_printf(s, " %12llu: ", iter->ts); |
549 | ||
550 | return !trace_seq_has_overflowed(s); | |
c4a8e8be FW |
551 | } |
552 | ||
553 | int trace_print_lat_context(struct trace_iterator *iter) | |
554 | { | |
983f938a | 555 | struct trace_array *tr = iter->tr; |
db4c75cb SR |
556 | /* trace_find_next_entry will reset ent_size */ |
557 | int ent_size = iter->ent_size; | |
c4a8e8be | 558 | struct trace_seq *s = &iter->seq; |
983f938a | 559 | u64 next_ts; |
c4a8e8be FW |
560 | struct trace_entry *entry = iter->ent, |
561 | *next_entry = trace_find_next_entry(iter, NULL, | |
562 | &next_ts); | |
983f938a | 563 | unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE); |
c4a8e8be | 564 | |
db4c75cb SR |
565 | /* Restore the original ent_size */ |
566 | iter->ent_size = ent_size; | |
567 | ||
c4a8e8be FW |
568 | if (!next_entry) |
569 | next_ts = iter->ts; | |
c4a8e8be FW |
570 | |
571 | if (verbose) { | |
4ca53085 SR |
572 | char comm[TASK_COMM_LEN]; |
573 | ||
574 | trace_find_cmdline(entry->pid, comm); | |
575 | ||
19a7fe20 SRRH |
576 | trace_seq_printf( |
577 | s, "%16s %5d %3d %d %08x %08lx ", | |
578 | comm, entry->pid, iter->cpu, entry->flags, | |
579 | entry->preempt_count, iter->idx); | |
c4a8e8be | 580 | } else { |
19a7fe20 | 581 | lat_print_generic(s, entry, iter->cpu); |
c4a8e8be FW |
582 | } |
583 | ||
19a7fe20 | 584 | lat_print_timestamp(iter, next_ts); |
8be0709f | 585 | |
19a7fe20 | 586 | return !trace_seq_has_overflowed(s); |
c4a8e8be FW |
587 | } |
588 | ||
f633cef0 SR |
589 | static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; |
590 | ||
591 | static int task_state_char(unsigned long state) | |
592 | { | |
593 | int bit = state ? __ffs(state) + 1 : 0; | |
594 | ||
595 | return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; | |
596 | } | |
597 | ||
f0868d1e SR |
598 | /** |
599 | * ftrace_find_event - find a registered event | |
600 | * @type: the type of event to look for | |
601 | * | |
602 | * Returns an event of type @type otherwise NULL | |
4f535968 | 603 | * Called with trace_event_read_lock() held. |
f0868d1e SR |
604 | */ |
605 | struct trace_event *ftrace_find_event(int type) | |
606 | { | |
607 | struct trace_event *event; | |
f0868d1e SR |
608 | unsigned key; |
609 | ||
610 | key = type & (EVENT_HASHSIZE - 1); | |
611 | ||
b67bfe0d | 612 | hlist_for_each_entry(event, &event_hash[key], node) { |
f0868d1e SR |
613 | if (event->type == type) |
614 | return event; | |
615 | } | |
616 | ||
617 | return NULL; | |
618 | } | |
619 | ||
060fa5c8 SR |
620 | static LIST_HEAD(ftrace_event_list); |
621 | ||
622 | static int trace_search_list(struct list_head **list) | |
623 | { | |
624 | struct trace_event *e; | |
625 | int last = __TRACE_LAST_TYPE; | |
626 | ||
627 | if (list_empty(&ftrace_event_list)) { | |
628 | *list = &ftrace_event_list; | |
629 | return last + 1; | |
630 | } | |
631 | ||
632 | /* | |
633 | * We used up all possible max events, | |
634 | * lets see if somebody freed one. | |
635 | */ | |
636 | list_for_each_entry(e, &ftrace_event_list, list) { | |
637 | if (e->type != last + 1) | |
638 | break; | |
639 | last++; | |
640 | } | |
641 | ||
642 | /* Did we used up all 65 thousand events??? */ | |
609a7404 | 643 | if ((last + 1) > TRACE_EVENT_TYPE_MAX) |
060fa5c8 SR |
644 | return 0; |
645 | ||
646 | *list = &e->list; | |
647 | return last + 1; | |
648 | } | |
649 | ||
4f535968 LJ |
650 | void trace_event_read_lock(void) |
651 | { | |
52f6ad6d | 652 | down_read(&trace_event_sem); |
4f535968 LJ |
653 | } |
654 | ||
655 | void trace_event_read_unlock(void) | |
656 | { | |
52f6ad6d | 657 | up_read(&trace_event_sem); |
4f535968 LJ |
658 | } |
659 | ||
f0868d1e | 660 | /** |
9023c930 | 661 | * register_trace_event - register output for an event type |
f0868d1e SR |
662 | * @event: the event type to register |
663 | * | |
664 | * Event types are stored in a hash and this hash is used to | |
665 | * find a way to print an event. If the @event->type is set | |
666 | * then it will use that type, otherwise it will assign a | |
667 | * type to use. | |
668 | * | |
669 | * If you assign your own type, please make sure it is added | |
670 | * to the trace_type enum in trace.h, to avoid collisions | |
671 | * with the dynamic types. | |
672 | * | |
673 | * Returns the event type number or zero on error. | |
674 | */ | |
9023c930 | 675 | int register_trace_event(struct trace_event *event) |
f0868d1e SR |
676 | { |
677 | unsigned key; | |
678 | int ret = 0; | |
679 | ||
52f6ad6d | 680 | down_write(&trace_event_sem); |
f0868d1e | 681 | |
060fa5c8 | 682 | if (WARN_ON(!event)) |
28bea271 | 683 | goto out; |
28bea271 | 684 | |
a9a57763 SR |
685 | if (WARN_ON(!event->funcs)) |
686 | goto out; | |
687 | ||
060fa5c8 SR |
688 | INIT_LIST_HEAD(&event->list); |
689 | ||
690 | if (!event->type) { | |
48dd0fed | 691 | struct list_head *list = NULL; |
060fa5c8 | 692 | |
609a7404 | 693 | if (next_event_type > TRACE_EVENT_TYPE_MAX) { |
060fa5c8 SR |
694 | |
695 | event->type = trace_search_list(&list); | |
696 | if (!event->type) | |
697 | goto out; | |
698 | ||
699 | } else { | |
8e1e1df2 | 700 | |
060fa5c8 SR |
701 | event->type = next_event_type++; |
702 | list = &ftrace_event_list; | |
703 | } | |
704 | ||
705 | if (WARN_ON(ftrace_find_event(event->type))) | |
706 | goto out; | |
707 | ||
708 | list_add_tail(&event->list, list); | |
709 | ||
710 | } else if (event->type > __TRACE_LAST_TYPE) { | |
f0868d1e SR |
711 | printk(KERN_WARNING "Need to add type to trace.h\n"); |
712 | WARN_ON(1); | |
f0868d1e | 713 | goto out; |
060fa5c8 SR |
714 | } else { |
715 | /* Is this event already used */ | |
716 | if (ftrace_find_event(event->type)) | |
717 | goto out; | |
718 | } | |
f0868d1e | 719 | |
a9a57763 SR |
720 | if (event->funcs->trace == NULL) |
721 | event->funcs->trace = trace_nop_print; | |
722 | if (event->funcs->raw == NULL) | |
723 | event->funcs->raw = trace_nop_print; | |
724 | if (event->funcs->hex == NULL) | |
725 | event->funcs->hex = trace_nop_print; | |
726 | if (event->funcs->binary == NULL) | |
727 | event->funcs->binary = trace_nop_print; | |
268ccda0 | 728 | |
f0868d1e SR |
729 | key = event->type & (EVENT_HASHSIZE - 1); |
730 | ||
4f535968 | 731 | hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e SR |
732 | |
733 | ret = event->type; | |
734 | out: | |
52f6ad6d | 735 | up_write(&trace_event_sem); |
f0868d1e SR |
736 | |
737 | return ret; | |
738 | } | |
9023c930 | 739 | EXPORT_SYMBOL_GPL(register_trace_event); |
f0868d1e | 740 | |
110bf2b7 | 741 | /* |
52f6ad6d | 742 | * Used by module code with the trace_event_sem held for write. |
110bf2b7 | 743 | */ |
9023c930 | 744 | int __unregister_trace_event(struct trace_event *event) |
110bf2b7 SR |
745 | { |
746 | hlist_del(&event->node); | |
747 | list_del(&event->list); | |
748 | return 0; | |
749 | } | |
750 | ||
f0868d1e | 751 | /** |
9023c930 | 752 | * unregister_trace_event - remove a no longer used event |
f0868d1e SR |
753 | * @event: the event to remove |
754 | */ | |
9023c930 | 755 | int unregister_trace_event(struct trace_event *event) |
f0868d1e | 756 | { |
52f6ad6d | 757 | down_write(&trace_event_sem); |
9023c930 | 758 | __unregister_trace_event(event); |
52f6ad6d | 759 | up_write(&trace_event_sem); |
f0868d1e SR |
760 | |
761 | return 0; | |
762 | } | |
9023c930 | 763 | EXPORT_SYMBOL_GPL(unregister_trace_event); |
f633cef0 SR |
764 | |
765 | /* | |
766 | * Standard events | |
767 | */ | |
768 | ||
a9a57763 SR |
769 | enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, |
770 | struct trace_event *event) | |
f633cef0 | 771 | { |
19a7fe20 | 772 | trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type); |
ee5e51f5 | 773 | |
19a7fe20 | 774 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
775 | } |
776 | ||
777 | /* TRACE_FN */ | |
a9a57763 SR |
778 | static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, |
779 | struct trace_event *event) | |
f633cef0 SR |
780 | { |
781 | struct ftrace_entry *field; | |
2c9b238e | 782 | struct trace_seq *s = &iter->seq; |
f633cef0 | 783 | |
2c9b238e | 784 | trace_assign_type(field, iter->ent); |
f633cef0 | 785 | |
19a7fe20 | 786 | seq_print_ip_sym(s, field->ip, flags); |
f633cef0 SR |
787 | |
788 | if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { | |
19a7fe20 SRRH |
789 | trace_seq_puts(s, " <-"); |
790 | seq_print_ip_sym(s, field->parent_ip, flags); | |
f633cef0 | 791 | } |
f633cef0 | 792 | |
19a7fe20 | 793 | trace_seq_putc(s, '\n'); |
f633cef0 | 794 | |
19a7fe20 | 795 | return trace_handle_return(s); |
f633cef0 SR |
796 | } |
797 | ||
a9a57763 SR |
798 | static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, |
799 | struct trace_event *event) | |
f633cef0 SR |
800 | { |
801 | struct ftrace_entry *field; | |
802 | ||
2c9b238e | 803 | trace_assign_type(field, iter->ent); |
f633cef0 | 804 | |
19a7fe20 SRRH |
805 | trace_seq_printf(&iter->seq, "%lx %lx\n", |
806 | field->ip, | |
807 | field->parent_ip); | |
f633cef0 | 808 | |
19a7fe20 | 809 | return trace_handle_return(&iter->seq); |
f633cef0 SR |
810 | } |
811 | ||
a9a57763 SR |
812 | static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, |
813 | struct trace_event *event) | |
f633cef0 SR |
814 | { |
815 | struct ftrace_entry *field; | |
2c9b238e | 816 | struct trace_seq *s = &iter->seq; |
f633cef0 | 817 | |
2c9b238e | 818 | trace_assign_type(field, iter->ent); |
f633cef0 | 819 | |
19a7fe20 SRRH |
820 | SEQ_PUT_HEX_FIELD(s, field->ip); |
821 | SEQ_PUT_HEX_FIELD(s, field->parent_ip); | |
f633cef0 | 822 | |
19a7fe20 | 823 | return trace_handle_return(s); |
f633cef0 SR |
824 | } |
825 | ||
a9a57763 SR |
826 | static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, |
827 | struct trace_event *event) | |
f633cef0 SR |
828 | { |
829 | struct ftrace_entry *field; | |
2c9b238e | 830 | struct trace_seq *s = &iter->seq; |
f633cef0 | 831 | |
2c9b238e | 832 | trace_assign_type(field, iter->ent); |
f633cef0 | 833 | |
19a7fe20 SRRH |
834 | SEQ_PUT_FIELD(s, field->ip); |
835 | SEQ_PUT_FIELD(s, field->parent_ip); | |
f633cef0 | 836 | |
19a7fe20 | 837 | return trace_handle_return(s); |
f633cef0 SR |
838 | } |
839 | ||
a9a57763 | 840 | static struct trace_event_functions trace_fn_funcs = { |
f633cef0 | 841 | .trace = trace_fn_trace, |
f633cef0 SR |
842 | .raw = trace_fn_raw, |
843 | .hex = trace_fn_hex, | |
844 | .binary = trace_fn_bin, | |
845 | }; | |
846 | ||
a9a57763 SR |
847 | static struct trace_event trace_fn_event = { |
848 | .type = TRACE_FN, | |
849 | .funcs = &trace_fn_funcs, | |
850 | }; | |
851 | ||
f633cef0 | 852 | /* TRACE_CTX an TRACE_WAKE */ |
ae7462b4 ACM |
853 | static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, |
854 | char *delim) | |
f633cef0 SR |
855 | { |
856 | struct ctx_switch_entry *field; | |
4ca53085 | 857 | char comm[TASK_COMM_LEN]; |
f633cef0 SR |
858 | int S, T; |
859 | ||
4ca53085 | 860 | |
2c9b238e | 861 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
862 | |
863 | T = task_state_char(field->next_state); | |
864 | S = task_state_char(field->prev_state); | |
4ca53085 | 865 | trace_find_cmdline(field->next_pid, comm); |
19a7fe20 SRRH |
866 | trace_seq_printf(&iter->seq, |
867 | " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n", | |
868 | field->prev_pid, | |
869 | field->prev_prio, | |
870 | S, delim, | |
871 | field->next_cpu, | |
872 | field->next_pid, | |
873 | field->next_prio, | |
874 | T, comm); | |
875 | ||
876 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
877 | } |
878 | ||
a9a57763 SR |
879 | static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, |
880 | struct trace_event *event) | |
f633cef0 | 881 | { |
2c9b238e | 882 | return trace_ctxwake_print(iter, "==>"); |
f633cef0 SR |
883 | } |
884 | ||
ae7462b4 | 885 | static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a57763 | 886 | int flags, struct trace_event *event) |
f633cef0 | 887 | { |
2c9b238e | 888 | return trace_ctxwake_print(iter, " +"); |
f633cef0 SR |
889 | } |
890 | ||
2c9b238e | 891 | static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef0 SR |
892 | { |
893 | struct ctx_switch_entry *field; | |
894 | int T; | |
895 | ||
2c9b238e | 896 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
897 | |
898 | if (!S) | |
b0f56f1a | 899 | S = task_state_char(field->prev_state); |
f633cef0 | 900 | T = task_state_char(field->next_state); |
19a7fe20 SRRH |
901 | trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n", |
902 | field->prev_pid, | |
903 | field->prev_prio, | |
904 | S, | |
905 | field->next_cpu, | |
906 | field->next_pid, | |
907 | field->next_prio, | |
908 | T); | |
909 | ||
910 | return trace_handle_return(&iter->seq); | |
f633cef0 SR |
911 | } |
912 | ||
a9a57763 SR |
913 | static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, |
914 | struct trace_event *event) | |
f633cef0 | 915 | { |
2c9b238e | 916 | return trace_ctxwake_raw(iter, 0); |
f633cef0 SR |
917 | } |
918 | ||
a9a57763 SR |
919 | static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, |
920 | struct trace_event *event) | |
f633cef0 | 921 | { |
2c9b238e | 922 | return trace_ctxwake_raw(iter, '+'); |
f633cef0 SR |
923 | } |
924 | ||
925 | ||
2c9b238e | 926 | static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef0 SR |
927 | { |
928 | struct ctx_switch_entry *field; | |
2c9b238e | 929 | struct trace_seq *s = &iter->seq; |
f633cef0 SR |
930 | int T; |
931 | ||
2c9b238e | 932 | trace_assign_type(field, iter->ent); |
f633cef0 SR |
933 | |
934 | if (!S) | |
b0f56f1a | 935 | S = task_state_char(field->prev_state); |
f633cef0 SR |
936 | T = task_state_char(field->next_state); |
937 | ||
19a7fe20 SRRH |
938 | SEQ_PUT_HEX_FIELD(s, field->prev_pid); |
939 | SEQ_PUT_HEX_FIELD(s, field->prev_prio); | |
940 | SEQ_PUT_HEX_FIELD(s, S); | |
941 | SEQ_PUT_HEX_FIELD(s, field->next_cpu); | |
942 | SEQ_PUT_HEX_FIELD(s, field->next_pid); | |
943 | SEQ_PUT_HEX_FIELD(s, field->next_prio); | |
944 | SEQ_PUT_HEX_FIELD(s, T); | |
f633cef0 | 945 | |
19a7fe20 | 946 | return trace_handle_return(s); |
f633cef0 SR |
947 | } |
948 | ||
a9a57763 SR |
949 | static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, |
950 | struct trace_event *event) | |
f633cef0 | 951 | { |
2c9b238e | 952 | return trace_ctxwake_hex(iter, 0); |
f633cef0 SR |
953 | } |
954 | ||
a9a57763 SR |
955 | static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, |
956 | struct trace_event *event) | |
f633cef0 | 957 | { |
2c9b238e | 958 | return trace_ctxwake_hex(iter, '+'); |
f633cef0 SR |
959 | } |
960 | ||
ae7462b4 | 961 | static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a57763 | 962 | int flags, struct trace_event *event) |
f633cef0 SR |
963 | { |
964 | struct ctx_switch_entry *field; | |
2c9b238e | 965 | struct trace_seq *s = &iter->seq; |
f633cef0 | 966 | |
2c9b238e | 967 | trace_assign_type(field, iter->ent); |
f633cef0 | 968 | |
19a7fe20 SRRH |
969 | SEQ_PUT_FIELD(s, field->prev_pid); |
970 | SEQ_PUT_FIELD(s, field->prev_prio); | |
971 | SEQ_PUT_FIELD(s, field->prev_state); | |
972 | SEQ_PUT_FIELD(s, field->next_cpu); | |
973 | SEQ_PUT_FIELD(s, field->next_pid); | |
974 | SEQ_PUT_FIELD(s, field->next_prio); | |
975 | SEQ_PUT_FIELD(s, field->next_state); | |
f633cef0 | 976 | |
19a7fe20 | 977 | return trace_handle_return(s); |
f633cef0 SR |
978 | } |
979 | ||
a9a57763 | 980 | static struct trace_event_functions trace_ctx_funcs = { |
f633cef0 | 981 | .trace = trace_ctx_print, |
f633cef0 SR |
982 | .raw = trace_ctx_raw, |
983 | .hex = trace_ctx_hex, | |
984 | .binary = trace_ctxwake_bin, | |
985 | }; | |
986 | ||
a9a57763 SR |
987 | static struct trace_event trace_ctx_event = { |
988 | .type = TRACE_CTX, | |
989 | .funcs = &trace_ctx_funcs, | |
990 | }; | |
991 | ||
992 | static struct trace_event_functions trace_wake_funcs = { | |
f633cef0 | 993 | .trace = trace_wake_print, |
f633cef0 SR |
994 | .raw = trace_wake_raw, |
995 | .hex = trace_wake_hex, | |
996 | .binary = trace_ctxwake_bin, | |
997 | }; | |
998 | ||
a9a57763 SR |
999 | static struct trace_event trace_wake_event = { |
1000 | .type = TRACE_WAKE, | |
1001 | .funcs = &trace_wake_funcs, | |
1002 | }; | |
1003 | ||
f633cef0 SR |
1004 | /* TRACE_STACK */ |
1005 | ||
ae7462b4 | 1006 | static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a57763 | 1007 | int flags, struct trace_event *event) |
f633cef0 SR |
1008 | { |
1009 | struct stack_entry *field; | |
2c9b238e | 1010 | struct trace_seq *s = &iter->seq; |
4a9bd3f1 SR |
1011 | unsigned long *p; |
1012 | unsigned long *end; | |
f633cef0 | 1013 | |
2c9b238e | 1014 | trace_assign_type(field, iter->ent); |
4a9bd3f1 | 1015 | end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef0 | 1016 | |
19a7fe20 | 1017 | trace_seq_puts(s, "<stack trace>\n"); |
4a9bd3f1 SR |
1018 | |
1019 | for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { | |
f633cef0 | 1020 | |
19a7fe20 SRRH |
1021 | if (trace_seq_has_overflowed(s)) |
1022 | break; | |
f633cef0 | 1023 | |
19a7fe20 SRRH |
1024 | trace_seq_puts(s, " => "); |
1025 | seq_print_ip_sym(s, *p, flags); | |
1026 | trace_seq_putc(s, '\n'); | |
1027 | } | |
f633cef0 | 1028 | |
19a7fe20 | 1029 | return trace_handle_return(s); |
f633cef0 SR |
1030 | } |
1031 | ||
a9a57763 | 1032 | static struct trace_event_functions trace_stack_funcs = { |
f633cef0 | 1033 | .trace = trace_stack_print, |
f633cef0 SR |
1034 | }; |
1035 | ||
a9a57763 SR |
1036 | static struct trace_event trace_stack_event = { |
1037 | .type = TRACE_STACK, | |
1038 | .funcs = &trace_stack_funcs, | |
1039 | }; | |
1040 | ||
f633cef0 | 1041 | /* TRACE_USER_STACK */ |
ae7462b4 | 1042 | static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a57763 | 1043 | int flags, struct trace_event *event) |
f633cef0 | 1044 | { |
983f938a | 1045 | struct trace_array *tr = iter->tr; |
f633cef0 | 1046 | struct userstack_entry *field; |
2c9b238e | 1047 | struct trace_seq *s = &iter->seq; |
6b1032d5 SRRH |
1048 | struct mm_struct *mm = NULL; |
1049 | unsigned int i; | |
f633cef0 | 1050 | |
2c9b238e | 1051 | trace_assign_type(field, iter->ent); |
f633cef0 | 1052 | |
19a7fe20 | 1053 | trace_seq_puts(s, "<user stack trace>\n"); |
6b1032d5 | 1054 | |
983f938a | 1055 | if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) { |
6b1032d5 SRRH |
1056 | struct task_struct *task; |
1057 | /* | |
1058 | * we do the lookup on the thread group leader, | |
1059 | * since individual threads might have already quit! | |
1060 | */ | |
1061 | rcu_read_lock(); | |
1062 | task = find_task_by_vpid(field->tgid); | |
1063 | if (task) | |
1064 | mm = get_task_mm(task); | |
1065 | rcu_read_unlock(); | |
1066 | } | |
1067 | ||
1068 | for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { | |
1069 | unsigned long ip = field->caller[i]; | |
1070 | ||
1071 | if (ip == ULONG_MAX || trace_seq_has_overflowed(s)) | |
1072 | break; | |
1073 | ||
1074 | trace_seq_puts(s, " => "); | |
1075 | ||
1076 | if (!ip) { | |
1077 | trace_seq_puts(s, "??"); | |
1078 | trace_seq_putc(s, '\n'); | |
1079 | continue; | |
1080 | } | |
1081 | ||
1082 | seq_print_user_ip(s, mm, ip, flags); | |
1083 | trace_seq_putc(s, '\n'); | |
1084 | } | |
1085 | ||
1086 | if (mm) | |
1087 | mmput(mm); | |
f633cef0 | 1088 | |
19a7fe20 | 1089 | return trace_handle_return(s); |
f633cef0 SR |
1090 | } |
1091 | ||
a9a57763 | 1092 | static struct trace_event_functions trace_user_stack_funcs = { |
f633cef0 | 1093 | .trace = trace_user_stack_print, |
f633cef0 SR |
1094 | }; |
1095 | ||
a9a57763 SR |
1096 | static struct trace_event trace_user_stack_event = { |
1097 | .type = TRACE_USER_STACK, | |
1098 | .funcs = &trace_user_stack_funcs, | |
1099 | }; | |
1100 | ||
09ae7234 SRRH |
1101 | /* TRACE_BPUTS */ |
1102 | static enum print_line_t | |
1103 | trace_bputs_print(struct trace_iterator *iter, int flags, | |
1104 | struct trace_event *event) | |
1105 | { | |
1106 | struct trace_entry *entry = iter->ent; | |
1107 | struct trace_seq *s = &iter->seq; | |
1108 | struct bputs_entry *field; | |
1109 | ||
1110 | trace_assign_type(field, entry); | |
1111 | ||
19a7fe20 SRRH |
1112 | seq_print_ip_sym(s, field->ip, flags); |
1113 | trace_seq_puts(s, ": "); | |
1114 | trace_seq_puts(s, field->str); | |
09ae7234 | 1115 | |
19a7fe20 | 1116 | return trace_handle_return(s); |
09ae7234 SRRH |
1117 | } |
1118 | ||
1119 | ||
1120 | static enum print_line_t | |
1121 | trace_bputs_raw(struct trace_iterator *iter, int flags, | |
1122 | struct trace_event *event) | |
1123 | { | |
1124 | struct bputs_entry *field; | |
1125 | struct trace_seq *s = &iter->seq; | |
1126 | ||
1127 | trace_assign_type(field, iter->ent); | |
1128 | ||
19a7fe20 SRRH |
1129 | trace_seq_printf(s, ": %lx : ", field->ip); |
1130 | trace_seq_puts(s, field->str); | |
09ae7234 | 1131 | |
19a7fe20 | 1132 | return trace_handle_return(s); |
09ae7234 SRRH |
1133 | } |
1134 | ||
1135 | static struct trace_event_functions trace_bputs_funcs = { | |
1136 | .trace = trace_bputs_print, | |
1137 | .raw = trace_bputs_raw, | |
1138 | }; | |
1139 | ||
1140 | static struct trace_event trace_bputs_event = { | |
1141 | .type = TRACE_BPUTS, | |
1142 | .funcs = &trace_bputs_funcs, | |
1143 | }; | |
1144 | ||
48ead020 | 1145 | /* TRACE_BPRINT */ |
1427cdf0 | 1146 | static enum print_line_t |
a9a57763 SR |
1147 | trace_bprint_print(struct trace_iterator *iter, int flags, |
1148 | struct trace_event *event) | |
1427cdf0 LJ |
1149 | { |
1150 | struct trace_entry *entry = iter->ent; | |
1151 | struct trace_seq *s = &iter->seq; | |
48ead020 | 1152 | struct bprint_entry *field; |
1427cdf0 LJ |
1153 | |
1154 | trace_assign_type(field, entry); | |
1155 | ||
19a7fe20 SRRH |
1156 | seq_print_ip_sym(s, field->ip, flags); |
1157 | trace_seq_puts(s, ": "); | |
1158 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1159 | |
19a7fe20 | 1160 | return trace_handle_return(s); |
1427cdf0 LJ |
1161 | } |
1162 | ||
769b0441 | 1163 | |
48ead020 | 1164 | static enum print_line_t |
a9a57763 SR |
1165 | trace_bprint_raw(struct trace_iterator *iter, int flags, |
1166 | struct trace_event *event) | |
1427cdf0 | 1167 | { |
48ead020 | 1168 | struct bprint_entry *field; |
1427cdf0 | 1169 | struct trace_seq *s = &iter->seq; |
1427cdf0 | 1170 | |
769b0441 | 1171 | trace_assign_type(field, iter->ent); |
1427cdf0 | 1172 | |
19a7fe20 SRRH |
1173 | trace_seq_printf(s, ": %lx : ", field->ip); |
1174 | trace_seq_bprintf(s, field->fmt, field->buf); | |
1427cdf0 | 1175 | |
19a7fe20 | 1176 | return trace_handle_return(s); |
1427cdf0 LJ |
1177 | } |
1178 | ||
a9a57763 SR |
1179 | static struct trace_event_functions trace_bprint_funcs = { |
1180 | .trace = trace_bprint_print, | |
1181 | .raw = trace_bprint_raw, | |
1182 | }; | |
769b0441 | 1183 | |
48ead020 FW |
1184 | static struct trace_event trace_bprint_event = { |
1185 | .type = TRACE_BPRINT, | |
a9a57763 | 1186 | .funcs = &trace_bprint_funcs, |
48ead020 FW |
1187 | }; |
1188 | ||
1189 | /* TRACE_PRINT */ | |
1190 | static enum print_line_t trace_print_print(struct trace_iterator *iter, | |
a9a57763 | 1191 | int flags, struct trace_event *event) |
48ead020 FW |
1192 | { |
1193 | struct print_entry *field; | |
1194 | struct trace_seq *s = &iter->seq; | |
1195 | ||
1196 | trace_assign_type(field, iter->ent); | |
1197 | ||
19a7fe20 SRRH |
1198 | seq_print_ip_sym(s, field->ip, flags); |
1199 | trace_seq_printf(s, ": %s", field->buf); | |
48ead020 | 1200 | |
19a7fe20 | 1201 | return trace_handle_return(s); |
48ead020 FW |
1202 | } |
1203 | ||
a9a57763 SR |
1204 | static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, |
1205 | struct trace_event *event) | |
48ead020 FW |
1206 | { |
1207 | struct print_entry *field; | |
1208 | ||
1209 | trace_assign_type(field, iter->ent); | |
1210 | ||
19a7fe20 | 1211 | trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf); |
48ead020 | 1212 | |
19a7fe20 | 1213 | return trace_handle_return(&iter->seq); |
48ead020 FW |
1214 | } |
1215 | ||
a9a57763 | 1216 | static struct trace_event_functions trace_print_funcs = { |
769b0441 FW |
1217 | .trace = trace_print_print, |
1218 | .raw = trace_print_raw, | |
1427cdf0 LJ |
1219 | }; |
1220 | ||
a9a57763 SR |
1221 | static struct trace_event trace_print_event = { |
1222 | .type = TRACE_PRINT, | |
1223 | .funcs = &trace_print_funcs, | |
1224 | }; | |
1225 | ||
48ead020 | 1226 | |
f633cef0 SR |
1227 | static struct trace_event *events[] __initdata = { |
1228 | &trace_fn_event, | |
1229 | &trace_ctx_event, | |
1230 | &trace_wake_event, | |
f633cef0 SR |
1231 | &trace_stack_event, |
1232 | &trace_user_stack_event, | |
09ae7234 | 1233 | &trace_bputs_event, |
48ead020 | 1234 | &trace_bprint_event, |
f633cef0 SR |
1235 | &trace_print_event, |
1236 | NULL | |
1237 | }; | |
1238 | ||
1239 | __init static int init_events(void) | |
1240 | { | |
1241 | struct trace_event *event; | |
1242 | int i, ret; | |
1243 | ||
1244 | for (i = 0; events[i]; i++) { | |
1245 | event = events[i]; | |
1246 | ||
9023c930 | 1247 | ret = register_trace_event(event); |
f633cef0 SR |
1248 | if (!ret) { |
1249 | printk(KERN_WARNING "event %d failed to register\n", | |
1250 | event->type); | |
1251 | WARN_ON_ONCE(1); | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | return 0; | |
1256 | } | |
7374e827 | 1257 | early_initcall(init_events); |