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Commit | Line | Data |
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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 | */ | |
538bafb5 SR |
21 | #include <dirent.h> |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
538bafb5 SR |
25 | #include <stdarg.h> |
26 | #include <sys/types.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/wait.h> | |
29 | #include <sys/mman.h> | |
30 | #include <pthread.h> | |
31 | #include <fcntl.h> | |
32 | #include <unistd.h> | |
538bafb5 SR |
33 | #include <errno.h> |
34 | ||
1ef2ed10 | 35 | #include "../perf.h" |
538bafb5 SR |
36 | #include "util.h" |
37 | #include "trace-event.h" | |
84f5d36f | 38 | #include "debug.h" |
538bafb5 SR |
39 | |
40 | static int input_fd; | |
41 | ||
ebf3c675 | 42 | static ssize_t trace_data_size; |
454c407e | 43 | static bool repipe; |
9215545e | 44 | |
4a31e565 | 45 | static int __do_read(int fd, void *buf, int size) |
9215545e TZ |
46 | { |
47 | int rsize = size; | |
48 | ||
49 | while (size) { | |
50 | int ret = read(fd, buf, size); | |
51 | ||
52 | if (ret <= 0) | |
53 | return -1; | |
54 | ||
454c407e TZ |
55 | if (repipe) { |
56 | int retw = write(STDOUT_FILENO, buf, ret); | |
57 | ||
4a31e565 NK |
58 | if (retw <= 0 || retw != ret) { |
59 | pr_debug("repiping input file"); | |
60 | return -1; | |
61 | } | |
454c407e TZ |
62 | } |
63 | ||
9215545e TZ |
64 | size -= ret; |
65 | buf += ret; | |
66 | } | |
67 | ||
68 | return rsize; | |
69 | } | |
70 | ||
4a31e565 | 71 | static int do_read(void *data, int size) |
538bafb5 SR |
72 | { |
73 | int r; | |
74 | ||
4a31e565 NK |
75 | r = __do_read(input_fd, data, size); |
76 | if (r <= 0) { | |
77 | pr_debug("reading input file (size expected=%d received=%d)", | |
78 | size, r); | |
79 | return -1; | |
80 | } | |
9215545e | 81 | |
ebf3c675 | 82 | trace_data_size += r; |
9215545e | 83 | |
538bafb5 SR |
84 | return r; |
85 | } | |
86 | ||
cbb5cf7f TZ |
87 | /* If it fails, the next read will report it */ |
88 | static void skip(int size) | |
89 | { | |
90 | char buf[BUFSIZ]; | |
91 | int r; | |
92 | ||
93 | while (size) { | |
94 | r = size > BUFSIZ ? BUFSIZ : size; | |
4a31e565 | 95 | do_read(buf, r); |
cbb5cf7f TZ |
96 | size -= r; |
97 | }; | |
98 | } | |
99 | ||
da378962 | 100 | static unsigned int read4(struct pevent *pevent) |
538bafb5 SR |
101 | { |
102 | unsigned int data; | |
103 | ||
4a31e565 NK |
104 | if (do_read(&data, 4) < 0) |
105 | return 0; | |
da378962 | 106 | return __data2host4(pevent, data); |
538bafb5 SR |
107 | } |
108 | ||
da378962 | 109 | static unsigned long long read8(struct pevent *pevent) |
538bafb5 SR |
110 | { |
111 | unsigned long long data; | |
112 | ||
4a31e565 NK |
113 | if (do_read(&data, 8) < 0) |
114 | return 0; | |
da378962 | 115 | return __data2host8(pevent, data); |
538bafb5 SR |
116 | } |
117 | ||
118 | static char *read_string(void) | |
119 | { | |
120 | char buf[BUFSIZ]; | |
121 | char *str = NULL; | |
122 | int size = 0; | |
f887f301 | 123 | off_t r; |
9215545e | 124 | char c; |
538bafb5 SR |
125 | |
126 | for (;;) { | |
9215545e | 127 | r = read(input_fd, &c, 1); |
452958fd NK |
128 | if (r < 0) { |
129 | pr_debug("reading input file"); | |
130 | goto out; | |
131 | } | |
538bafb5 | 132 | |
452958fd NK |
133 | if (!r) { |
134 | pr_debug("no data"); | |
135 | goto out; | |
136 | } | |
538bafb5 | 137 | |
454c407e TZ |
138 | if (repipe) { |
139 | int retw = write(STDOUT_FILENO, &c, 1); | |
140 | ||
452958fd NK |
141 | if (retw <= 0 || retw != r) { |
142 | pr_debug("repiping input file string"); | |
143 | goto out; | |
144 | } | |
454c407e TZ |
145 | } |
146 | ||
9215545e | 147 | buf[size++] = c; |
538bafb5 | 148 | |
9215545e TZ |
149 | if (!c) |
150 | break; | |
538bafb5 SR |
151 | } |
152 | ||
ebf3c675 | 153 | trace_data_size += size; |
9215545e | 154 | |
a4c98367 NK |
155 | str = malloc(size); |
156 | if (str) | |
157 | memcpy(str, buf, size); | |
452958fd | 158 | out: |
538bafb5 SR |
159 | return str; |
160 | } | |
161 | ||
a4c98367 | 162 | static int read_proc_kallsyms(struct pevent *pevent) |
538bafb5 SR |
163 | { |
164 | unsigned int size; | |
538bafb5 | 165 | |
da378962 | 166 | size = read4(pevent); |
538bafb5 | 167 | if (!size) |
a4c98367 | 168 | return 0; |
4263cece ACM |
169 | /* |
170 | * Just skip it, now that we configure libtraceevent to use the | |
171 | * tools/perf/ symbol resolver. | |
172 | * | |
173 | * We need to skip it so that we can continue parsing old perf.data | |
174 | * files, that contains this /proc/kallsyms payload. | |
175 | * | |
176 | * Newer perf.data files will have just the 4-bytes zeros "kallsyms | |
177 | * payload", so that older tools can continue reading it and interpret | |
178 | * it as "no kallsyms payload is present". | |
179 | */ | |
180 | lseek(input_fd, size, SEEK_CUR); | |
181 | trace_data_size += size; | |
a4c98367 | 182 | return 0; |
538bafb5 SR |
183 | } |
184 | ||
a4c98367 | 185 | static int read_ftrace_printk(struct pevent *pevent) |
538bafb5 SR |
186 | { |
187 | unsigned int size; | |
188 | char *buf; | |
189 | ||
4a31e565 | 190 | /* it can have 0 size */ |
da378962 | 191 | size = read4(pevent); |
538bafb5 | 192 | if (!size) |
a4c98367 NK |
193 | return 0; |
194 | ||
195 | buf = malloc(size); | |
196 | if (buf == NULL) | |
197 | return -1; | |
538bafb5 | 198 | |
4a31e565 NK |
199 | if (do_read(buf, size) < 0) { |
200 | free(buf); | |
201 | return -1; | |
202 | } | |
538bafb5 | 203 | |
da378962 | 204 | parse_ftrace_printk(pevent, buf, size); |
538bafb5 SR |
205 | |
206 | free(buf); | |
a4c98367 | 207 | return 0; |
538bafb5 SR |
208 | } |
209 | ||
a4c98367 | 210 | static int read_header_files(struct pevent *pevent) |
538bafb5 SR |
211 | { |
212 | unsigned long long size; | |
94b4d89e | 213 | char *header_page; |
538bafb5 | 214 | char buf[BUFSIZ]; |
4a31e565 | 215 | int ret = 0; |
538bafb5 | 216 | |
4a31e565 NK |
217 | if (do_read(buf, 12) < 0) |
218 | return -1; | |
538bafb5 | 219 | |
452958fd NK |
220 | if (memcmp(buf, "header_page", 12) != 0) { |
221 | pr_debug("did not read header page"); | |
222 | return -1; | |
223 | } | |
538bafb5 | 224 | |
da378962 | 225 | size = read8(pevent); |
94b4d89e NK |
226 | |
227 | header_page = malloc(size); | |
228 | if (header_page == NULL) | |
229 | return -1; | |
230 | ||
231 | if (do_read(header_page, size) < 0) { | |
232 | pr_debug("did not read header page"); | |
233 | free(header_page); | |
234 | return -1; | |
235 | } | |
236 | ||
237 | if (!pevent_parse_header_page(pevent, header_page, size, | |
238 | pevent_get_long_size(pevent))) { | |
239 | /* | |
240 | * The commit field in the page is of type long, | |
241 | * use that instead, since it represents the kernel. | |
242 | */ | |
243 | pevent_set_long_size(pevent, pevent->header_page_size_size); | |
244 | } | |
245 | free(header_page); | |
538bafb5 | 246 | |
4a31e565 NK |
247 | if (do_read(buf, 13) < 0) |
248 | return -1; | |
249 | ||
452958fd NK |
250 | if (memcmp(buf, "header_event", 13) != 0) { |
251 | pr_debug("did not read header event"); | |
252 | return -1; | |
253 | } | |
538bafb5 | 254 | |
da378962 | 255 | size = read8(pevent); |
2b2efc7f | 256 | skip(size); |
4a31e565 | 257 | |
4a31e565 | 258 | return ret; |
538bafb5 SR |
259 | } |
260 | ||
a4c98367 | 261 | static int read_ftrace_file(struct pevent *pevent, unsigned long long size) |
538bafb5 | 262 | { |
a7619aef | 263 | int ret; |
538bafb5 SR |
264 | char *buf; |
265 | ||
a4c98367 | 266 | buf = malloc(size); |
a7619aef NK |
267 | if (buf == NULL) { |
268 | pr_debug("memory allocation failure\n"); | |
a4c98367 | 269 | return -1; |
a7619aef | 270 | } |
a4c98367 | 271 | |
a7619aef NK |
272 | ret = do_read(buf, size); |
273 | if (ret < 0) { | |
274 | pr_debug("error reading ftrace file.\n"); | |
275 | goto out; | |
4a31e565 NK |
276 | } |
277 | ||
a7619aef NK |
278 | ret = parse_ftrace_file(pevent, buf, size); |
279 | if (ret < 0) | |
280 | pr_debug("error parsing ftrace file.\n"); | |
281 | out: | |
538bafb5 | 282 | free(buf); |
a7619aef | 283 | return ret; |
538bafb5 SR |
284 | } |
285 | ||
a4c98367 | 286 | static int read_event_file(struct pevent *pevent, char *sys, |
da378962 | 287 | unsigned long long size) |
538bafb5 | 288 | { |
a7619aef | 289 | int ret; |
538bafb5 SR |
290 | char *buf; |
291 | ||
a4c98367 | 292 | buf = malloc(size); |
a7619aef NK |
293 | if (buf == NULL) { |
294 | pr_debug("memory allocation failure\n"); | |
a4c98367 | 295 | return -1; |
a7619aef | 296 | } |
a4c98367 | 297 | |
a7619aef NK |
298 | ret = do_read(buf, size); |
299 | if (ret < 0) { | |
4a31e565 | 300 | free(buf); |
a7619aef | 301 | goto out; |
4a31e565 NK |
302 | } |
303 | ||
a7619aef NK |
304 | ret = parse_event_file(pevent, buf, size, sys); |
305 | if (ret < 0) | |
306 | pr_debug("error parsing event file.\n"); | |
307 | out: | |
538bafb5 | 308 | free(buf); |
a7619aef | 309 | return ret; |
538bafb5 SR |
310 | } |
311 | ||
a4c98367 | 312 | static int read_ftrace_files(struct pevent *pevent) |
538bafb5 SR |
313 | { |
314 | unsigned long long size; | |
315 | int count; | |
316 | int i; | |
a4c98367 | 317 | int ret; |
538bafb5 | 318 | |
da378962 | 319 | count = read4(pevent); |
538bafb5 SR |
320 | |
321 | for (i = 0; i < count; i++) { | |
da378962 | 322 | size = read8(pevent); |
a4c98367 NK |
323 | ret = read_ftrace_file(pevent, size); |
324 | if (ret) | |
325 | return ret; | |
538bafb5 | 326 | } |
a4c98367 | 327 | return 0; |
538bafb5 SR |
328 | } |
329 | ||
a4c98367 | 330 | static int read_event_files(struct pevent *pevent) |
538bafb5 SR |
331 | { |
332 | unsigned long long size; | |
333 | char *sys; | |
334 | int systems; | |
335 | int count; | |
336 | int i,x; | |
a4c98367 | 337 | int ret; |
538bafb5 | 338 | |
da378962 | 339 | systems = read4(pevent); |
538bafb5 SR |
340 | |
341 | for (i = 0; i < systems; i++) { | |
342 | sys = read_string(); | |
a4c98367 NK |
343 | if (sys == NULL) |
344 | return -1; | |
538bafb5 | 345 | |
da378962 | 346 | count = read4(pevent); |
4a31e565 | 347 | |
538bafb5 | 348 | for (x=0; x < count; x++) { |
da378962 | 349 | size = read8(pevent); |
a4c98367 NK |
350 | ret = read_event_file(pevent, sys, size); |
351 | if (ret) | |
352 | return ret; | |
538bafb5 SR |
353 | } |
354 | } | |
a4c98367 | 355 | return 0; |
538bafb5 SR |
356 | } |
357 | ||
cd4ceb63 NK |
358 | static int read_saved_cmdline(struct pevent *pevent) |
359 | { | |
360 | unsigned long long size; | |
361 | char *buf; | |
a7619aef | 362 | int ret; |
cd4ceb63 NK |
363 | |
364 | /* it can have 0 size */ | |
365 | size = read8(pevent); | |
366 | if (!size) | |
367 | return 0; | |
368 | ||
369 | buf = malloc(size + 1); | |
a7619aef NK |
370 | if (buf == NULL) { |
371 | pr_debug("memory allocation failure\n"); | |
cd4ceb63 | 372 | return -1; |
a7619aef | 373 | } |
cd4ceb63 | 374 | |
a7619aef NK |
375 | ret = do_read(buf, size); |
376 | if (ret < 0) { | |
377 | pr_debug("error reading saved cmdlines\n"); | |
378 | goto out; | |
cd4ceb63 NK |
379 | } |
380 | ||
381 | parse_saved_cmdline(pevent, buf, size); | |
a7619aef NK |
382 | ret = 0; |
383 | out: | |
cd4ceb63 | 384 | free(buf); |
a7619aef | 385 | return ret; |
cd4ceb63 NK |
386 | } |
387 | ||
29f5ffd3 | 388 | ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe) |
538bafb5 | 389 | { |
538bafb5 SR |
390 | char buf[BUFSIZ]; |
391 | char test[] = { 23, 8, 68 }; | |
392 | char *version; | |
d9340c1d | 393 | int show_version = 0; |
538bafb5 SR |
394 | int show_funcs = 0; |
395 | int show_printk = 0; | |
3dce2ce3 | 396 | ssize_t size = -1; |
63af28fa NK |
397 | int file_bigendian; |
398 | int host_bigendian; | |
59657f9c | 399 | int file_long_size; |
30f36762 | 400 | int file_page_size; |
29f5ffd3 | 401 | struct pevent *pevent = NULL; |
a4c98367 | 402 | int err; |
3dce2ce3 | 403 | |
454c407e | 404 | repipe = __repipe; |
03456a15 | 405 | input_fd = fd; |
538bafb5 | 406 | |
4a31e565 NK |
407 | if (do_read(buf, 3) < 0) |
408 | return -1; | |
452958fd NK |
409 | if (memcmp(buf, test, 3) != 0) { |
410 | pr_debug("no trace data in the file"); | |
411 | return -1; | |
412 | } | |
538bafb5 | 413 | |
4a31e565 NK |
414 | if (do_read(buf, 7) < 0) |
415 | return -1; | |
452958fd NK |
416 | if (memcmp(buf, "tracing", 7) != 0) { |
417 | pr_debug("not a trace file (missing 'tracing' tag)"); | |
418 | return -1; | |
419 | } | |
538bafb5 SR |
420 | |
421 | version = read_string(); | |
a4c98367 NK |
422 | if (version == NULL) |
423 | return -1; | |
d9340c1d IM |
424 | if (show_version) |
425 | printf("version = %s\n", version); | |
538bafb5 | 426 | |
cd4ceb63 NK |
427 | if (do_read(buf, 1) < 0) { |
428 | free(version); | |
4a31e565 | 429 | return -1; |
cd4ceb63 | 430 | } |
538bafb5 SR |
431 | file_bigendian = buf[0]; |
432 | host_bigendian = bigendian(); | |
433 | ||
29f5ffd3 JO |
434 | if (trace_event__init(tevent)) { |
435 | pr_debug("trace_event__init failed"); | |
3dce2ce3 NK |
436 | goto out; |
437 | } | |
aaf045f7 | 438 | |
29f5ffd3 JO |
439 | pevent = tevent->pevent; |
440 | ||
441 | pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT); | |
442 | pevent_set_file_bigendian(pevent, file_bigendian); | |
443 | pevent_set_host_bigendian(pevent, host_bigendian); | |
444 | ||
4a31e565 NK |
445 | if (do_read(buf, 1) < 0) |
446 | goto out; | |
59657f9c | 447 | file_long_size = buf[0]; |
538bafb5 | 448 | |
30f36762 NK |
449 | file_page_size = read4(pevent); |
450 | if (!file_page_size) | |
4a31e565 | 451 | goto out; |
538bafb5 | 452 | |
59657f9c | 453 | pevent_set_long_size(pevent, file_long_size); |
30f36762 NK |
454 | pevent_set_page_size(pevent, file_page_size); |
455 | ||
a4c98367 NK |
456 | err = read_header_files(pevent); |
457 | if (err) | |
458 | goto out; | |
459 | err = read_ftrace_files(pevent); | |
460 | if (err) | |
461 | goto out; | |
462 | err = read_event_files(pevent); | |
463 | if (err) | |
464 | goto out; | |
465 | err = read_proc_kallsyms(pevent); | |
466 | if (err) | |
467 | goto out; | |
468 | err = read_ftrace_printk(pevent); | |
469 | if (err) | |
470 | goto out; | |
cd4ceb63 NK |
471 | if (atof(version) >= 0.6) { |
472 | err = read_saved_cmdline(pevent); | |
473 | if (err) | |
474 | goto out; | |
475 | } | |
538bafb5 | 476 | |
ebf3c675 | 477 | size = trace_data_size; |
454c407e | 478 | repipe = false; |
9215545e | 479 | |
538bafb5 | 480 | if (show_funcs) { |
3dce2ce3 NK |
481 | pevent_print_funcs(pevent); |
482 | } else if (show_printk) { | |
483 | pevent_print_printk(pevent); | |
538bafb5 SR |
484 | } |
485 | ||
3dce2ce3 NK |
486 | pevent = NULL; |
487 | ||
488 | out: | |
489 | if (pevent) | |
29f5ffd3 | 490 | trace_event__cleanup(tevent); |
cd4ceb63 | 491 | free(version); |
9215545e | 492 | return size; |
538bafb5 | 493 | } |