]>
Commit | Line | Data |
---|---|---|
538bafb5 SR |
1 | /* |
2 | * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com> | |
3 | * | |
4 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; version 2 of the License (not later!) | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | * | |
19 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
20 | */ | |
f887f301 | 21 | #define _FILE_OFFSET_BITS 64 |
538bafb5 SR |
22 | |
23 | #include <dirent.h> | |
24 | #include <stdio.h> | |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | #include <getopt.h> | |
28 | #include <stdarg.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/stat.h> | |
31 | #include <sys/wait.h> | |
32 | #include <sys/mman.h> | |
33 | #include <pthread.h> | |
34 | #include <fcntl.h> | |
35 | #include <unistd.h> | |
36 | #include <ctype.h> | |
37 | #include <errno.h> | |
38 | ||
1ef2ed10 | 39 | #include "../perf.h" |
538bafb5 SR |
40 | #include "util.h" |
41 | #include "trace-event.h" | |
42 | ||
43 | static int input_fd; | |
44 | ||
45 | static int read_page; | |
46 | ||
47 | int file_bigendian; | |
48 | int host_bigendian; | |
49 | static int long_size; | |
50 | ||
51 | static unsigned long page_size; | |
52 | ||
9215545e | 53 | static ssize_t calc_data_size; |
454c407e | 54 | static bool repipe; |
9215545e TZ |
55 | |
56 | static int do_read(int fd, void *buf, int size) | |
57 | { | |
58 | int rsize = size; | |
59 | ||
60 | while (size) { | |
61 | int ret = read(fd, buf, size); | |
62 | ||
63 | if (ret <= 0) | |
64 | return -1; | |
65 | ||
454c407e TZ |
66 | if (repipe) { |
67 | int retw = write(STDOUT_FILENO, buf, ret); | |
68 | ||
69 | if (retw <= 0 || retw != ret) | |
70 | die("repiping input file"); | |
71 | } | |
72 | ||
9215545e TZ |
73 | size -= ret; |
74 | buf += ret; | |
75 | } | |
76 | ||
77 | return rsize; | |
78 | } | |
79 | ||
538bafb5 SR |
80 | static int read_or_die(void *data, int size) |
81 | { | |
82 | int r; | |
83 | ||
9215545e TZ |
84 | r = do_read(input_fd, data, size); |
85 | if (r <= 0) | |
538bafb5 SR |
86 | die("reading input file (size expected=%d received=%d)", |
87 | size, r); | |
9215545e TZ |
88 | |
89 | if (calc_data_size) | |
90 | calc_data_size += r; | |
91 | ||
538bafb5 SR |
92 | return r; |
93 | } | |
94 | ||
cbb5cf7f TZ |
95 | /* If it fails, the next read will report it */ |
96 | static void skip(int size) | |
97 | { | |
98 | char buf[BUFSIZ]; | |
99 | int r; | |
100 | ||
101 | while (size) { | |
102 | r = size > BUFSIZ ? BUFSIZ : size; | |
103 | read_or_die(buf, r); | |
104 | size -= r; | |
105 | }; | |
106 | } | |
107 | ||
538bafb5 SR |
108 | static unsigned int read4(void) |
109 | { | |
110 | unsigned int data; | |
111 | ||
112 | read_or_die(&data, 4); | |
113 | return __data2host4(data); | |
114 | } | |
115 | ||
116 | static unsigned long long read8(void) | |
117 | { | |
118 | unsigned long long data; | |
119 | ||
120 | read_or_die(&data, 8); | |
121 | return __data2host8(data); | |
122 | } | |
123 | ||
124 | static char *read_string(void) | |
125 | { | |
126 | char buf[BUFSIZ]; | |
127 | char *str = NULL; | |
128 | int size = 0; | |
f887f301 | 129 | off_t r; |
9215545e | 130 | char c; |
538bafb5 SR |
131 | |
132 | for (;;) { | |
9215545e | 133 | r = read(input_fd, &c, 1); |
538bafb5 SR |
134 | if (r < 0) |
135 | die("reading input file"); | |
136 | ||
137 | if (!r) | |
138 | die("no data"); | |
139 | ||
454c407e TZ |
140 | if (repipe) { |
141 | int retw = write(STDOUT_FILENO, &c, 1); | |
142 | ||
143 | if (retw <= 0 || retw != r) | |
144 | die("repiping input file string"); | |
145 | } | |
146 | ||
9215545e | 147 | buf[size++] = c; |
538bafb5 | 148 | |
9215545e TZ |
149 | if (!c) |
150 | break; | |
538bafb5 SR |
151 | } |
152 | ||
9215545e TZ |
153 | if (calc_data_size) |
154 | calc_data_size += size; | |
155 | ||
156 | str = malloc_or_die(size); | |
157 | memcpy(str, buf, size); | |
538bafb5 SR |
158 | |
159 | return str; | |
160 | } | |
161 | ||
162 | static void read_proc_kallsyms(void) | |
163 | { | |
164 | unsigned int size; | |
165 | char *buf; | |
166 | ||
167 | size = read4(); | |
168 | if (!size) | |
169 | return; | |
170 | ||
7691b1ec | 171 | buf = malloc_or_die(size + 1); |
538bafb5 | 172 | read_or_die(buf, size); |
7691b1ec | 173 | buf[size] = '\0'; |
538bafb5 SR |
174 | |
175 | parse_proc_kallsyms(buf, size); | |
176 | ||
177 | free(buf); | |
178 | } | |
179 | ||
180 | static void read_ftrace_printk(void) | |
181 | { | |
182 | unsigned int size; | |
183 | char *buf; | |
184 | ||
185 | size = read4(); | |
186 | if (!size) | |
187 | return; | |
188 | ||
189 | buf = malloc_or_die(size); | |
190 | read_or_die(buf, size); | |
191 | ||
192 | parse_ftrace_printk(buf, size); | |
193 | ||
194 | free(buf); | |
195 | } | |
196 | ||
197 | static void read_header_files(void) | |
198 | { | |
199 | unsigned long long size; | |
538bafb5 SR |
200 | char *header_event; |
201 | char buf[BUFSIZ]; | |
202 | ||
203 | read_or_die(buf, 12); | |
204 | ||
205 | if (memcmp(buf, "header_page", 12) != 0) | |
206 | die("did not read header page"); | |
207 | ||
208 | size = read8(); | |
d00a47cc | 209 | skip(size); |
538bafb5 SR |
210 | |
211 | /* | |
212 | * The size field in the page is of type long, | |
213 | * use that instead, since it represents the kernel. | |
214 | */ | |
215 | long_size = header_page_size_size; | |
216 | ||
217 | read_or_die(buf, 13); | |
218 | if (memcmp(buf, "header_event", 13) != 0) | |
219 | die("did not read header event"); | |
220 | ||
221 | size = read8(); | |
222 | header_event = malloc_or_die(size); | |
223 | read_or_die(header_event, size); | |
224 | free(header_event); | |
225 | } | |
226 | ||
227 | static void read_ftrace_file(unsigned long long size) | |
228 | { | |
229 | char *buf; | |
230 | ||
231 | buf = malloc_or_die(size); | |
232 | read_or_die(buf, size); | |
233 | parse_ftrace_file(buf, size); | |
234 | free(buf); | |
235 | } | |
236 | ||
237 | static void read_event_file(char *sys, unsigned long long size) | |
238 | { | |
239 | char *buf; | |
240 | ||
241 | buf = malloc_or_die(size); | |
242 | read_or_die(buf, size); | |
243 | parse_event_file(buf, size, sys); | |
244 | free(buf); | |
245 | } | |
246 | ||
247 | static void read_ftrace_files(void) | |
248 | { | |
249 | unsigned long long size; | |
250 | int count; | |
251 | int i; | |
252 | ||
253 | count = read4(); | |
254 | ||
255 | for (i = 0; i < count; i++) { | |
256 | size = read8(); | |
257 | read_ftrace_file(size); | |
258 | } | |
259 | } | |
260 | ||
261 | static void read_event_files(void) | |
262 | { | |
263 | unsigned long long size; | |
264 | char *sys; | |
265 | int systems; | |
266 | int count; | |
267 | int i,x; | |
268 | ||
269 | systems = read4(); | |
270 | ||
271 | for (i = 0; i < systems; i++) { | |
272 | sys = read_string(); | |
273 | ||
274 | count = read4(); | |
275 | for (x=0; x < count; x++) { | |
276 | size = read8(); | |
277 | read_event_file(sys, size); | |
278 | } | |
279 | } | |
280 | } | |
281 | ||
282 | struct cpu_data { | |
283 | unsigned long long offset; | |
284 | unsigned long long size; | |
285 | unsigned long long timestamp; | |
286 | struct record *next; | |
287 | char *page; | |
288 | int cpu; | |
289 | int index; | |
290 | int page_size; | |
291 | }; | |
292 | ||
293 | static struct cpu_data *cpu_data; | |
294 | ||
295 | static void update_cpu_data_index(int cpu) | |
296 | { | |
297 | cpu_data[cpu].offset += page_size; | |
298 | cpu_data[cpu].size -= page_size; | |
299 | cpu_data[cpu].index = 0; | |
300 | } | |
301 | ||
302 | static void get_next_page(int cpu) | |
303 | { | |
f887f301 XG |
304 | off_t save_seek; |
305 | off_t ret; | |
538bafb5 SR |
306 | |
307 | if (!cpu_data[cpu].page) | |
308 | return; | |
309 | ||
310 | if (read_page) { | |
311 | if (cpu_data[cpu].size <= page_size) { | |
312 | free(cpu_data[cpu].page); | |
313 | cpu_data[cpu].page = NULL; | |
314 | return; | |
315 | } | |
316 | ||
317 | update_cpu_data_index(cpu); | |
318 | ||
319 | /* other parts of the code may expect the pointer to not move */ | |
f887f301 | 320 | save_seek = lseek(input_fd, 0, SEEK_CUR); |
538bafb5 | 321 | |
f887f301 XG |
322 | ret = lseek(input_fd, cpu_data[cpu].offset, SEEK_SET); |
323 | if (ret == (off_t)-1) | |
538bafb5 SR |
324 | die("failed to lseek"); |
325 | ret = read(input_fd, cpu_data[cpu].page, page_size); | |
326 | if (ret < 0) | |
327 | die("failed to read page"); | |
328 | ||
329 | /* reset the file pointer back */ | |
f887f301 | 330 | lseek(input_fd, save_seek, SEEK_SET); |
538bafb5 SR |
331 | |
332 | return; | |
333 | } | |
334 | ||
335 | munmap(cpu_data[cpu].page, page_size); | |
336 | cpu_data[cpu].page = NULL; | |
337 | ||
338 | if (cpu_data[cpu].size <= page_size) | |
339 | return; | |
340 | ||
341 | update_cpu_data_index(cpu); | |
342 | ||
343 | cpu_data[cpu].page = mmap(NULL, page_size, PROT_READ, MAP_PRIVATE, | |
344 | input_fd, cpu_data[cpu].offset); | |
345 | if (cpu_data[cpu].page == MAP_FAILED) | |
346 | die("failed to mmap cpu %d at offset 0x%llx", | |
347 | cpu, cpu_data[cpu].offset); | |
348 | } | |
349 | ||
350 | static unsigned int type_len4host(unsigned int type_len_ts) | |
351 | { | |
352 | if (file_bigendian) | |
353 | return (type_len_ts >> 27) & ((1 << 5) - 1); | |
354 | else | |
355 | return type_len_ts & ((1 << 5) - 1); | |
356 | } | |
357 | ||
358 | static unsigned int ts4host(unsigned int type_len_ts) | |
359 | { | |
360 | if (file_bigendian) | |
361 | return type_len_ts & ((1 << 27) - 1); | |
362 | else | |
363 | return type_len_ts >> 5; | |
364 | } | |
365 | ||
366 | static int calc_index(void *ptr, int cpu) | |
367 | { | |
368 | return (unsigned long)ptr - (unsigned long)cpu_data[cpu].page; | |
369 | } | |
370 | ||
371 | struct record *trace_peek_data(int cpu) | |
372 | { | |
373 | struct record *data; | |
374 | void *page = cpu_data[cpu].page; | |
375 | int idx = cpu_data[cpu].index; | |
376 | void *ptr = page + idx; | |
377 | unsigned long long extend; | |
378 | unsigned int type_len_ts; | |
379 | unsigned int type_len; | |
380 | unsigned int delta; | |
381 | unsigned int length = 0; | |
382 | ||
383 | if (cpu_data[cpu].next) | |
384 | return cpu_data[cpu].next; | |
385 | ||
386 | if (!page) | |
387 | return NULL; | |
388 | ||
389 | if (!idx) { | |
390 | /* FIXME: handle header page */ | |
391 | if (header_page_ts_size != 8) | |
392 | die("expected a long long type for timestamp"); | |
393 | cpu_data[cpu].timestamp = data2host8(ptr); | |
394 | ptr += 8; | |
395 | switch (header_page_size_size) { | |
396 | case 4: | |
397 | cpu_data[cpu].page_size = data2host4(ptr); | |
398 | ptr += 4; | |
399 | break; | |
400 | case 8: | |
401 | cpu_data[cpu].page_size = data2host8(ptr); | |
402 | ptr += 8; | |
403 | break; | |
404 | default: | |
405 | die("bad long size"); | |
406 | } | |
407 | ptr = cpu_data[cpu].page + header_page_data_offset; | |
408 | } | |
409 | ||
410 | read_again: | |
411 | idx = calc_index(ptr, cpu); | |
412 | ||
413 | if (idx >= cpu_data[cpu].page_size) { | |
414 | get_next_page(cpu); | |
415 | return trace_peek_data(cpu); | |
416 | } | |
417 | ||
418 | type_len_ts = data2host4(ptr); | |
419 | ptr += 4; | |
420 | ||
421 | type_len = type_len4host(type_len_ts); | |
422 | delta = ts4host(type_len_ts); | |
423 | ||
424 | switch (type_len) { | |
425 | case RINGBUF_TYPE_PADDING: | |
426 | if (!delta) | |
427 | die("error, hit unexpected end of page"); | |
428 | length = data2host4(ptr); | |
429 | ptr += 4; | |
430 | length *= 4; | |
431 | ptr += length; | |
432 | goto read_again; | |
433 | ||
434 | case RINGBUF_TYPE_TIME_EXTEND: | |
435 | extend = data2host4(ptr); | |
436 | ptr += 4; | |
437 | extend <<= TS_SHIFT; | |
438 | extend += delta; | |
439 | cpu_data[cpu].timestamp += extend; | |
440 | goto read_again; | |
441 | ||
442 | case RINGBUF_TYPE_TIME_STAMP: | |
443 | ptr += 12; | |
444 | break; | |
445 | case 0: | |
446 | length = data2host4(ptr); | |
447 | ptr += 4; | |
448 | die("here! length=%d", length); | |
449 | break; | |
450 | default: | |
451 | length = type_len * 4; | |
452 | break; | |
453 | } | |
454 | ||
455 | cpu_data[cpu].timestamp += delta; | |
456 | ||
457 | data = malloc_or_die(sizeof(*data)); | |
458 | memset(data, 0, sizeof(*data)); | |
459 | ||
460 | data->ts = cpu_data[cpu].timestamp; | |
461 | data->size = length; | |
462 | data->data = ptr; | |
463 | ptr += length; | |
464 | ||
465 | cpu_data[cpu].index = calc_index(ptr, cpu); | |
466 | cpu_data[cpu].next = data; | |
467 | ||
468 | return data; | |
469 | } | |
470 | ||
471 | struct record *trace_read_data(int cpu) | |
472 | { | |
473 | struct record *data; | |
474 | ||
475 | data = trace_peek_data(cpu); | |
476 | cpu_data[cpu].next = NULL; | |
477 | ||
478 | return data; | |
479 | } | |
480 | ||
454c407e | 481 | ssize_t trace_report(int fd, bool __repipe) |
538bafb5 | 482 | { |
538bafb5 SR |
483 | char buf[BUFSIZ]; |
484 | char test[] = { 23, 8, 68 }; | |
485 | char *version; | |
d9340c1d | 486 | int show_version = 0; |
538bafb5 SR |
487 | int show_funcs = 0; |
488 | int show_printk = 0; | |
9215545e TZ |
489 | ssize_t size; |
490 | ||
491 | calc_data_size = 1; | |
454c407e | 492 | repipe = __repipe; |
538bafb5 | 493 | |
03456a15 | 494 | input_fd = fd; |
538bafb5 SR |
495 | |
496 | read_or_die(buf, 3); | |
497 | if (memcmp(buf, test, 3) != 0) | |
e2561368 | 498 | die("no trace data in the file"); |
538bafb5 SR |
499 | |
500 | read_or_die(buf, 7); | |
501 | if (memcmp(buf, "tracing", 7) != 0) | |
e2561368 | 502 | die("not a trace file (missing 'tracing' tag)"); |
538bafb5 SR |
503 | |
504 | version = read_string(); | |
d9340c1d IM |
505 | if (show_version) |
506 | printf("version = %s\n", version); | |
538bafb5 SR |
507 | free(version); |
508 | ||
509 | read_or_die(buf, 1); | |
510 | file_bigendian = buf[0]; | |
511 | host_bigendian = bigendian(); | |
512 | ||
513 | read_or_die(buf, 1); | |
514 | long_size = buf[0]; | |
515 | ||
516 | page_size = read4(); | |
517 | ||
518 | read_header_files(); | |
519 | ||
520 | read_ftrace_files(); | |
521 | read_event_files(); | |
522 | read_proc_kallsyms(); | |
523 | read_ftrace_printk(); | |
524 | ||
9215545e TZ |
525 | size = calc_data_size - 1; |
526 | calc_data_size = 0; | |
454c407e | 527 | repipe = false; |
9215545e | 528 | |
538bafb5 SR |
529 | if (show_funcs) { |
530 | print_funcs(); | |
9215545e | 531 | return size; |
538bafb5 SR |
532 | } |
533 | if (show_printk) { | |
534 | print_printk(); | |
9215545e | 535 | return size; |
538bafb5 SR |
536 | } |
537 | ||
9215545e | 538 | return size; |
538bafb5 | 539 | } |