diff options
author | Steven Rostedt <rostedt@goodmis.org> | 2009-08-17 10:18:06 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-08-17 10:32:38 -0400 |
commit | 538bafb5cc92a86d97b427421231f185574fe3db (patch) | |
tree | 74fa4f0bf5ccbd4e7b0bc635698b3f67e66354c9 /tools | |
parent | 520509436417901f30106e021e037c75dfe5386c (diff) |
perf tools: Add trace event debugfs stream reader
Add util/trace-event-read.c which handles trace events
informations reading.
This file is a rename of the trace-read.c file from the
trace-cmd tools, written by Steven Rostedt and Josh Triplett,
originated from the git tree:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
This is its perf tools integration.
[ fweisbec@gmail.com: various changes for perf tools
integration. ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: "Luis Claudio R. Goncalves" <lclaudio@uudg.org>
Cc: Clark Williams <williams@redhat.com>
Cc: Jon Masters <jonathan@jonmasters.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Zhaolei <zhaolei@cn.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Jiaying Zhang <jiayingz@google.com>
Cc: Anton Blanchard <anton@samba.org>
LKML-Reference: <1250518688-7207-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/perf/util/trace-event-read.c | 508 |
1 files changed, 508 insertions, 0 deletions
diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c new file mode 100644 index 000000000000..1dac301ae54f --- /dev/null +++ b/tools/perf/util/trace-event-read.c | |||
@@ -0,0 +1,508 @@ | |||
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 | */ | ||
21 | #define _LARGEFILE64_SOURCE | ||
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 | |||
39 | #include "util.h" | ||
40 | #include "trace-event.h" | ||
41 | |||
42 | static int input_fd; | ||
43 | |||
44 | static int read_page; | ||
45 | |||
46 | int file_bigendian; | ||
47 | int host_bigendian; | ||
48 | static int long_size; | ||
49 | |||
50 | static unsigned long page_size; | ||
51 | |||
52 | static int read_or_die(void *data, int size) | ||
53 | { | ||
54 | int r; | ||
55 | |||
56 | r = read(input_fd, data, size); | ||
57 | if (r != size) | ||
58 | die("reading input file (size expected=%d received=%d)", | ||
59 | size, r); | ||
60 | return r; | ||
61 | } | ||
62 | |||
63 | static unsigned int read4(void) | ||
64 | { | ||
65 | unsigned int data; | ||
66 | |||
67 | read_or_die(&data, 4); | ||
68 | return __data2host4(data); | ||
69 | } | ||
70 | |||
71 | static unsigned long long read8(void) | ||
72 | { | ||
73 | unsigned long long data; | ||
74 | |||
75 | read_or_die(&data, 8); | ||
76 | return __data2host8(data); | ||
77 | } | ||
78 | |||
79 | static char *read_string(void) | ||
80 | { | ||
81 | char buf[BUFSIZ]; | ||
82 | char *str = NULL; | ||
83 | int size = 0; | ||
84 | int i; | ||
85 | int r; | ||
86 | |||
87 | for (;;) { | ||
88 | r = read(input_fd, buf, BUFSIZ); | ||
89 | if (r < 0) | ||
90 | die("reading input file"); | ||
91 | |||
92 | if (!r) | ||
93 | die("no data"); | ||
94 | |||
95 | for (i = 0; i < r; i++) { | ||
96 | if (!buf[i]) | ||
97 | break; | ||
98 | } | ||
99 | if (i < r) | ||
100 | break; | ||
101 | |||
102 | if (str) { | ||
103 | size += BUFSIZ; | ||
104 | str = realloc(str, size); | ||
105 | if (!str) | ||
106 | die("malloc of size %d", size); | ||
107 | memcpy(str + (size - BUFSIZ), buf, BUFSIZ); | ||
108 | } else { | ||
109 | size = BUFSIZ; | ||
110 | str = malloc_or_die(size); | ||
111 | memcpy(str, buf, size); | ||
112 | } | ||
113 | } | ||
114 | |||
115 | /* move the file descriptor to the end of the string */ | ||
116 | r = lseek(input_fd, -(r - (i+1)), SEEK_CUR); | ||
117 | if (r < 0) | ||
118 | die("lseek"); | ||
119 | |||
120 | if (str) { | ||
121 | size += i; | ||
122 | str = realloc(str, size); | ||
123 | if (!str) | ||
124 | die("malloc of size %d", size); | ||
125 | memcpy(str + (size - i), buf, i); | ||
126 | } else { | ||
127 | size = i; | ||
128 | str = malloc_or_die(i); | ||
129 | memcpy(str, buf, i); | ||
130 | } | ||
131 | |||
132 | return str; | ||
133 | } | ||
134 | |||
135 | static void read_proc_kallsyms(void) | ||
136 | { | ||
137 | unsigned int size; | ||
138 | char *buf; | ||
139 | |||
140 | size = read4(); | ||
141 | if (!size) | ||
142 | return; | ||
143 | |||
144 | buf = malloc_or_die(size); | ||
145 | read_or_die(buf, size); | ||
146 | |||
147 | parse_proc_kallsyms(buf, size); | ||
148 | |||
149 | free(buf); | ||
150 | } | ||
151 | |||
152 | static void read_ftrace_printk(void) | ||
153 | { | ||
154 | unsigned int size; | ||
155 | char *buf; | ||
156 | |||
157 | size = read4(); | ||
158 | if (!size) | ||
159 | return; | ||
160 | |||
161 | buf = malloc_or_die(size); | ||
162 | read_or_die(buf, size); | ||
163 | |||
164 | parse_ftrace_printk(buf, size); | ||
165 | |||
166 | free(buf); | ||
167 | } | ||
168 | |||
169 | static void read_header_files(void) | ||
170 | { | ||
171 | unsigned long long size; | ||
172 | char *header_page; | ||
173 | char *header_event; | ||
174 | char buf[BUFSIZ]; | ||
175 | |||
176 | read_or_die(buf, 12); | ||
177 | |||
178 | if (memcmp(buf, "header_page", 12) != 0) | ||
179 | die("did not read header page"); | ||
180 | |||
181 | size = read8(); | ||
182 | header_page = malloc_or_die(size); | ||
183 | read_or_die(header_page, size); | ||
184 | parse_header_page(header_page, size); | ||
185 | free(header_page); | ||
186 | |||
187 | /* | ||
188 | * The size field in the page is of type long, | ||
189 | * use that instead, since it represents the kernel. | ||
190 | */ | ||
191 | long_size = header_page_size_size; | ||
192 | |||
193 | read_or_die(buf, 13); | ||
194 | if (memcmp(buf, "header_event", 13) != 0) | ||
195 | die("did not read header event"); | ||
196 | |||
197 | size = read8(); | ||
198 | header_event = malloc_or_die(size); | ||
199 | read_or_die(header_event, size); | ||
200 | free(header_event); | ||
201 | } | ||
202 | |||
203 | static void read_ftrace_file(unsigned long long size) | ||
204 | { | ||
205 | char *buf; | ||
206 | |||
207 | buf = malloc_or_die(size); | ||
208 | read_or_die(buf, size); | ||
209 | parse_ftrace_file(buf, size); | ||
210 | free(buf); | ||
211 | } | ||
212 | |||
213 | static void read_event_file(char *sys, unsigned long long size) | ||
214 | { | ||
215 | char *buf; | ||
216 | |||
217 | buf = malloc_or_die(size); | ||
218 | read_or_die(buf, size); | ||
219 | parse_event_file(buf, size, sys); | ||
220 | free(buf); | ||
221 | } | ||
222 | |||
223 | static void read_ftrace_files(void) | ||
224 | { | ||
225 | unsigned long long size; | ||
226 | int count; | ||
227 | int i; | ||
228 | |||
229 | count = read4(); | ||
230 | |||
231 | for (i = 0; i < count; i++) { | ||
232 | size = read8(); | ||
233 | read_ftrace_file(size); | ||
234 | } | ||
235 | } | ||
236 | |||
237 | static void read_event_files(void) | ||
238 | { | ||
239 | unsigned long long size; | ||
240 | char *sys; | ||
241 | int systems; | ||
242 | int count; | ||
243 | int i,x; | ||
244 | |||
245 | systems = read4(); | ||
246 | |||
247 | for (i = 0; i < systems; i++) { | ||
248 | sys = read_string(); | ||
249 | |||
250 | count = read4(); | ||
251 | for (x=0; x < count; x++) { | ||
252 | size = read8(); | ||
253 | read_event_file(sys, size); | ||
254 | } | ||
255 | } | ||
256 | } | ||
257 | |||
258 | struct cpu_data { | ||
259 | unsigned long long offset; | ||
260 | unsigned long long size; | ||
261 | unsigned long long timestamp; | ||
262 | struct record *next; | ||
263 | char *page; | ||
264 | int cpu; | ||
265 | int index; | ||
266 | int page_size; | ||
267 | }; | ||
268 | |||
269 | static struct cpu_data *cpu_data; | ||
270 | |||
271 | static void update_cpu_data_index(int cpu) | ||
272 | { | ||
273 | cpu_data[cpu].offset += page_size; | ||
274 | cpu_data[cpu].size -= page_size; | ||
275 | cpu_data[cpu].index = 0; | ||
276 | } | ||
277 | |||
278 | static void get_next_page(int cpu) | ||
279 | { | ||
280 | off64_t save_seek; | ||
281 | off64_t ret; | ||
282 | |||
283 | if (!cpu_data[cpu].page) | ||
284 | return; | ||
285 | |||
286 | if (read_page) { | ||
287 | if (cpu_data[cpu].size <= page_size) { | ||
288 | free(cpu_data[cpu].page); | ||
289 | cpu_data[cpu].page = NULL; | ||
290 | return; | ||
291 | } | ||
292 | |||
293 | update_cpu_data_index(cpu); | ||
294 | |||
295 | /* other parts of the code may expect the pointer to not move */ | ||
296 | save_seek = lseek64(input_fd, 0, SEEK_CUR); | ||
297 | |||
298 | ret = lseek64(input_fd, cpu_data[cpu].offset, SEEK_SET); | ||
299 | if (ret < 0) | ||
300 | die("failed to lseek"); | ||
301 | ret = read(input_fd, cpu_data[cpu].page, page_size); | ||
302 | if (ret < 0) | ||
303 | die("failed to read page"); | ||
304 | |||
305 | /* reset the file pointer back */ | ||
306 | lseek64(input_fd, save_seek, SEEK_SET); | ||
307 | |||
308 | return; | ||
309 | } | ||
310 | |||
311 | munmap(cpu_data[cpu].page, page_size); | ||
312 | cpu_data[cpu].page = NULL; | ||
313 | |||
314 | if (cpu_data[cpu].size <= page_size) | ||
315 | return; | ||
316 | |||
317 | update_cpu_data_index(cpu); | ||
318 | |||
319 | cpu_data[cpu].page = mmap(NULL, page_size, PROT_READ, MAP_PRIVATE, | ||
320 | input_fd, cpu_data[cpu].offset); | ||
321 | if (cpu_data[cpu].page == MAP_FAILED) | ||
322 | die("failed to mmap cpu %d at offset 0x%llx", | ||
323 | cpu, cpu_data[cpu].offset); | ||
324 | } | ||
325 | |||
326 | static unsigned int type_len4host(unsigned int type_len_ts) | ||
327 | { | ||
328 | if (file_bigendian) | ||
329 | return (type_len_ts >> 27) & ((1 << 5) - 1); | ||
330 | else | ||
331 | return type_len_ts & ((1 << 5) - 1); | ||
332 | } | ||
333 | |||
334 | static unsigned int ts4host(unsigned int type_len_ts) | ||
335 | { | ||
336 | if (file_bigendian) | ||
337 | return type_len_ts & ((1 << 27) - 1); | ||
338 | else | ||
339 | return type_len_ts >> 5; | ||
340 | } | ||
341 | |||
342 | static int calc_index(void *ptr, int cpu) | ||
343 | { | ||
344 | return (unsigned long)ptr - (unsigned long)cpu_data[cpu].page; | ||
345 | } | ||
346 | |||
347 | struct record *trace_peek_data(int cpu) | ||
348 | { | ||
349 | struct record *data; | ||
350 | void *page = cpu_data[cpu].page; | ||
351 | int idx = cpu_data[cpu].index; | ||
352 | void *ptr = page + idx; | ||
353 | unsigned long long extend; | ||
354 | unsigned int type_len_ts; | ||
355 | unsigned int type_len; | ||
356 | unsigned int delta; | ||
357 | unsigned int length = 0; | ||
358 | |||
359 | if (cpu_data[cpu].next) | ||
360 | return cpu_data[cpu].next; | ||
361 | |||
362 | if (!page) | ||
363 | return NULL; | ||
364 | |||
365 | if (!idx) { | ||
366 | /* FIXME: handle header page */ | ||
367 | if (header_page_ts_size != 8) | ||
368 | die("expected a long long type for timestamp"); | ||
369 | cpu_data[cpu].timestamp = data2host8(ptr); | ||
370 | ptr += 8; | ||
371 | switch (header_page_size_size) { | ||
372 | case 4: | ||
373 | cpu_data[cpu].page_size = data2host4(ptr); | ||
374 | ptr += 4; | ||
375 | break; | ||
376 | case 8: | ||
377 | cpu_data[cpu].page_size = data2host8(ptr); | ||
378 | ptr += 8; | ||
379 | break; | ||
380 | default: | ||
381 | die("bad long size"); | ||
382 | } | ||
383 | ptr = cpu_data[cpu].page + header_page_data_offset; | ||
384 | } | ||
385 | |||
386 | read_again: | ||
387 | idx = calc_index(ptr, cpu); | ||
388 | |||
389 | if (idx >= cpu_data[cpu].page_size) { | ||
390 | get_next_page(cpu); | ||
391 | return trace_peek_data(cpu); | ||
392 | } | ||
393 | |||
394 | type_len_ts = data2host4(ptr); | ||
395 | ptr += 4; | ||
396 | |||
397 | type_len = type_len4host(type_len_ts); | ||
398 | delta = ts4host(type_len_ts); | ||
399 | |||
400 | switch (type_len) { | ||
401 | case RINGBUF_TYPE_PADDING: | ||
402 | if (!delta) | ||
403 | die("error, hit unexpected end of page"); | ||
404 | length = data2host4(ptr); | ||
405 | ptr += 4; | ||
406 | length *= 4; | ||
407 | ptr += length; | ||
408 | goto read_again; | ||
409 | |||
410 | case RINGBUF_TYPE_TIME_EXTEND: | ||
411 | extend = data2host4(ptr); | ||
412 | ptr += 4; | ||
413 | extend <<= TS_SHIFT; | ||
414 | extend += delta; | ||
415 | cpu_data[cpu].timestamp += extend; | ||
416 | goto read_again; | ||
417 | |||
418 | case RINGBUF_TYPE_TIME_STAMP: | ||
419 | ptr += 12; | ||
420 | break; | ||
421 | case 0: | ||
422 | length = data2host4(ptr); | ||
423 | ptr += 4; | ||
424 | die("here! length=%d", length); | ||
425 | break; | ||
426 | default: | ||
427 | length = type_len * 4; | ||
428 | break; | ||
429 | } | ||
430 | |||
431 | cpu_data[cpu].timestamp += delta; | ||
432 | |||
433 | data = malloc_or_die(sizeof(*data)); | ||
434 | memset(data, 0, sizeof(*data)); | ||
435 | |||
436 | data->ts = cpu_data[cpu].timestamp; | ||
437 | data->size = length; | ||
438 | data->data = ptr; | ||
439 | ptr += length; | ||
440 | |||
441 | cpu_data[cpu].index = calc_index(ptr, cpu); | ||
442 | cpu_data[cpu].next = data; | ||
443 | |||
444 | return data; | ||
445 | } | ||
446 | |||
447 | struct record *trace_read_data(int cpu) | ||
448 | { | ||
449 | struct record *data; | ||
450 | |||
451 | data = trace_peek_data(cpu); | ||
452 | cpu_data[cpu].next = NULL; | ||
453 | |||
454 | return data; | ||
455 | } | ||
456 | |||
457 | void trace_report (void) | ||
458 | { | ||
459 | const char *input_file = "trace.info"; | ||
460 | char buf[BUFSIZ]; | ||
461 | char test[] = { 23, 8, 68 }; | ||
462 | char *version; | ||
463 | int show_funcs = 0; | ||
464 | int show_printk = 0; | ||
465 | |||
466 | input_fd = open(input_file, O_RDONLY); | ||
467 | if (input_fd < 0) | ||
468 | die("opening '%s'\n", input_file); | ||
469 | |||
470 | read_or_die(buf, 3); | ||
471 | if (memcmp(buf, test, 3) != 0) | ||
472 | die("not an trace data file"); | ||
473 | |||
474 | read_or_die(buf, 7); | ||
475 | if (memcmp(buf, "tracing", 7) != 0) | ||
476 | die("not a trace file (missing tracing)"); | ||
477 | |||
478 | version = read_string(); | ||
479 | printf("version = %s\n", version); | ||
480 | free(version); | ||
481 | |||
482 | read_or_die(buf, 1); | ||
483 | file_bigendian = buf[0]; | ||
484 | host_bigendian = bigendian(); | ||
485 | |||
486 | read_or_die(buf, 1); | ||
487 | long_size = buf[0]; | ||
488 | |||
489 | page_size = read4(); | ||
490 | |||
491 | read_header_files(); | ||
492 | |||
493 | read_ftrace_files(); | ||
494 | read_event_files(); | ||
495 | read_proc_kallsyms(); | ||
496 | read_ftrace_printk(); | ||
497 | |||
498 | if (show_funcs) { | ||
499 | print_funcs(); | ||
500 | return; | ||
501 | } | ||
502 | if (show_printk) { | ||
503 | print_printk(); | ||
504 | return; | ||
505 | } | ||
506 | |||
507 | return; | ||
508 | } | ||