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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#include <dirent.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
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 <fcntl.h>
31#include <unistd.h>
32#include <errno.h>
33
34#include "../perf.h"
35#include "util.h"
36#include "trace-event.h"
37#include "debug.h"
38
39static int input_fd;
40
41static ssize_t trace_data_size;
42static bool repipe;
43
44static int __do_read(int fd, void *buf, int size)
45{
46 int rsize = size;
47
48 while (size) {
49 int ret = read(fd, buf, size);
50
51 if (ret <= 0)
52 return -1;
53
54 if (repipe) {
55 int retw = write(STDOUT_FILENO, buf, ret);
56
57 if (retw <= 0 || retw != ret) {
58 pr_debug("repiping input file");
59 return -1;
60 }
61 }
62
63 size -= ret;
64 buf += ret;
65 }
66
67 return rsize;
68}
69
70static int do_read(void *data, int size)
71{
72 int r;
73
74 r = __do_read(input_fd, data, size);
75 if (r <= 0) {
76 pr_debug("reading input file (size expected=%d received=%d)",
77 size, r);
78 return -1;
79 }
80
81 trace_data_size += r;
82
83 return r;
84}
85
86/* If it fails, the next read will report it */
87static void skip(int size)
88{
89 char buf[BUFSIZ];
90 int r;
91
92 while (size) {
93 r = size > BUFSIZ ? BUFSIZ : size;
94 do_read(buf, r);
95 size -= r;
96 };
97}
98
99static unsigned int read4(struct pevent *pevent)
100{
101 unsigned int data;
102
103 if (do_read(&data, 4) < 0)
104 return 0;
105 return __data2host4(pevent, data);
106}
107
108static unsigned long long read8(struct pevent *pevent)
109{
110 unsigned long long data;
111
112 if (do_read(&data, 8) < 0)
113 return 0;
114 return __data2host8(pevent, data);
115}
116
117static char *read_string(void)
118{
119 char buf[BUFSIZ];
120 char *str = NULL;
121 int size = 0;
122 off_t r;
123 char c;
124
125 for (;;) {
126 r = read(input_fd, &c, 1);
127 if (r < 0) {
128 pr_debug("reading input file");
129 goto out;
130 }
131
132 if (!r) {
133 pr_debug("no data");
134 goto out;
135 }
136
137 if (repipe) {
138 int retw = write(STDOUT_FILENO, &c, 1);
139
140 if (retw <= 0 || retw != r) {
141 pr_debug("repiping input file string");
142 goto out;
143 }
144 }
145
146 buf[size++] = c;
147
148 if (!c)
149 break;
150 }
151
152 trace_data_size += size;
153
154 str = malloc(size);
155 if (str)
156 memcpy(str, buf, size);
157out:
158 return str;
159}
160
161static int read_proc_kallsyms(struct pevent *pevent)
162{
163 unsigned int size;
164
165 size = read4(pevent);
166 if (!size)
167 return 0;
168 /*
169 * Just skip it, now that we configure libtraceevent to use the
170 * tools/perf/ symbol resolver.
171 *
172 * We need to skip it so that we can continue parsing old perf.data
173 * files, that contains this /proc/kallsyms payload.
174 *
175 * Newer perf.data files will have just the 4-bytes zeros "kallsyms
176 * payload", so that older tools can continue reading it and interpret
177 * it as "no kallsyms payload is present".
178 */
179 lseek(input_fd, size, SEEK_CUR);
180 trace_data_size += size;
181 return 0;
182}
183
184static int read_ftrace_printk(struct pevent *pevent)
185{
186 unsigned int size;
187 char *buf;
188
189 /* it can have 0 size */
190 size = read4(pevent);
191 if (!size)
192 return 0;
193
194 buf = malloc(size + 1);
195 if (buf == NULL)
196 return -1;
197
198 if (do_read(buf, size) < 0) {
199 free(buf);
200 return -1;
201 }
202
203 buf[size] = '\0';
204
205 parse_ftrace_printk(pevent, buf, size);
206
207 free(buf);
208 return 0;
209}
210
211static int read_header_files(struct pevent *pevent)
212{
213 unsigned long long size;
214 char *header_page;
215 char buf[BUFSIZ];
216 int ret = 0;
217
218 if (do_read(buf, 12) < 0)
219 return -1;
220
221 if (memcmp(buf, "header_page", 12) != 0) {
222 pr_debug("did not read header page");
223 return -1;
224 }
225
226 size = read8(pevent);
227
228 header_page = malloc(size);
229 if (header_page == NULL)
230 return -1;
231
232 if (do_read(header_page, size) < 0) {
233 pr_debug("did not read header page");
234 free(header_page);
235 return -1;
236 }
237
238 if (!pevent_parse_header_page(pevent, header_page, size,
239 pevent_get_long_size(pevent))) {
240 /*
241 * The commit field in the page is of type long,
242 * use that instead, since it represents the kernel.
243 */
244 pevent_set_long_size(pevent, pevent->header_page_size_size);
245 }
246 free(header_page);
247
248 if (do_read(buf, 13) < 0)
249 return -1;
250
251 if (memcmp(buf, "header_event", 13) != 0) {
252 pr_debug("did not read header event");
253 return -1;
254 }
255
256 size = read8(pevent);
257 skip(size);
258
259 return ret;
260}
261
262static int read_ftrace_file(struct pevent *pevent, unsigned long long size)
263{
264 int ret;
265 char *buf;
266
267 buf = malloc(size);
268 if (buf == NULL) {
269 pr_debug("memory allocation failure\n");
270 return -1;
271 }
272
273 ret = do_read(buf, size);
274 if (ret < 0) {
275 pr_debug("error reading ftrace file.\n");
276 goto out;
277 }
278
279 ret = parse_ftrace_file(pevent, buf, size);
280 if (ret < 0)
281 pr_debug("error parsing ftrace file.\n");
282out:
283 free(buf);
284 return ret;
285}
286
287static int read_event_file(struct pevent *pevent, char *sys,
288 unsigned long long size)
289{
290 int ret;
291 char *buf;
292
293 buf = malloc(size);
294 if (buf == NULL) {
295 pr_debug("memory allocation failure\n");
296 return -1;
297 }
298
299 ret = do_read(buf, size);
300 if (ret < 0) {
301 free(buf);
302 goto out;
303 }
304
305 ret = parse_event_file(pevent, buf, size, sys);
306 if (ret < 0)
307 pr_debug("error parsing event file.\n");
308out:
309 free(buf);
310 return ret;
311}
312
313static int read_ftrace_files(struct pevent *pevent)
314{
315 unsigned long long size;
316 int count;
317 int i;
318 int ret;
319
320 count = read4(pevent);
321
322 for (i = 0; i < count; i++) {
323 size = read8(pevent);
324 ret = read_ftrace_file(pevent, size);
325 if (ret)
326 return ret;
327 }
328 return 0;
329}
330
331static int read_event_files(struct pevent *pevent)
332{
333 unsigned long long size;
334 char *sys;
335 int systems;
336 int count;
337 int i,x;
338 int ret;
339
340 systems = read4(pevent);
341
342 for (i = 0; i < systems; i++) {
343 sys = read_string();
344 if (sys == NULL)
345 return -1;
346
347 count = read4(pevent);
348
349 for (x=0; x < count; x++) {
350 size = read8(pevent);
351 ret = read_event_file(pevent, sys, size);
352 if (ret)
353 return ret;
354 }
355 }
356 return 0;
357}
358
359static int read_saved_cmdline(struct pevent *pevent)
360{
361 unsigned long long size;
362 char *buf;
363 int ret;
364
365 /* it can have 0 size */
366 size = read8(pevent);
367 if (!size)
368 return 0;
369
370 buf = malloc(size + 1);
371 if (buf == NULL) {
372 pr_debug("memory allocation failure\n");
373 return -1;
374 }
375
376 ret = do_read(buf, size);
377 if (ret < 0) {
378 pr_debug("error reading saved cmdlines\n");
379 goto out;
380 }
381
382 parse_saved_cmdline(pevent, buf, size);
383 ret = 0;
384out:
385 free(buf);
386 return ret;
387}
388
389ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe)
390{
391 char buf[BUFSIZ];
392 char test[] = { 23, 8, 68 };
393 char *version;
394 int show_version = 0;
395 int show_funcs = 0;
396 int show_printk = 0;
397 ssize_t size = -1;
398 int file_bigendian;
399 int host_bigendian;
400 int file_long_size;
401 int file_page_size;
402 struct pevent *pevent = NULL;
403 int err;
404
405 repipe = __repipe;
406 input_fd = fd;
407
408 if (do_read(buf, 3) < 0)
409 return -1;
410 if (memcmp(buf, test, 3) != 0) {
411 pr_debug("no trace data in the file");
412 return -1;
413 }
414
415 if (do_read(buf, 7) < 0)
416 return -1;
417 if (memcmp(buf, "tracing", 7) != 0) {
418 pr_debug("not a trace file (missing 'tracing' tag)");
419 return -1;
420 }
421
422 version = read_string();
423 if (version == NULL)
424 return -1;
425 if (show_version)
426 printf("version = %s\n", version);
427
428 if (do_read(buf, 1) < 0) {
429 free(version);
430 return -1;
431 }
432 file_bigendian = buf[0];
433 host_bigendian = bigendian();
434
435 if (trace_event__init(tevent)) {
436 pr_debug("trace_event__init failed");
437 goto out;
438 }
439
440 pevent = tevent->pevent;
441
442 pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
443 pevent_set_file_bigendian(pevent, file_bigendian);
444 pevent_set_host_bigendian(pevent, host_bigendian);
445
446 if (do_read(buf, 1) < 0)
447 goto out;
448 file_long_size = buf[0];
449
450 file_page_size = read4(pevent);
451 if (!file_page_size)
452 goto out;
453
454 pevent_set_long_size(pevent, file_long_size);
455 pevent_set_page_size(pevent, file_page_size);
456
457 err = read_header_files(pevent);
458 if (err)
459 goto out;
460 err = read_ftrace_files(pevent);
461 if (err)
462 goto out;
463 err = read_event_files(pevent);
464 if (err)
465 goto out;
466 err = read_proc_kallsyms(pevent);
467 if (err)
468 goto out;
469 err = read_ftrace_printk(pevent);
470 if (err)
471 goto out;
472 if (atof(version) >= 0.6) {
473 err = read_saved_cmdline(pevent);
474 if (err)
475 goto out;
476 }
477
478 size = trace_data_size;
479 repipe = false;
480
481 if (show_funcs) {
482 pevent_print_funcs(pevent);
483 } else if (show_printk) {
484 pevent_print_printk(pevent);
485 }
486
487 pevent = NULL;
488
489out:
490 if (pevent)
491 trace_event__cleanup(tevent);
492 free(version);
493 return size;
494}
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#include <dirent.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <getopt.h>
26#include <stdarg.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <sys/wait.h>
30#include <sys/mman.h>
31#include <pthread.h>
32#include <fcntl.h>
33#include <unistd.h>
34#include <errno.h>
35
36#include "../perf.h"
37#include "util.h"
38#include "trace-event.h"
39
40static int input_fd;
41
42static ssize_t trace_data_size;
43static bool repipe;
44
45static int __do_read(int fd, void *buf, int size)
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
55 if (repipe) {
56 int retw = write(STDOUT_FILENO, buf, ret);
57
58 if (retw <= 0 || retw != ret) {
59 pr_debug("repiping input file");
60 return -1;
61 }
62 }
63
64 size -= ret;
65 buf += ret;
66 }
67
68 return rsize;
69}
70
71static int do_read(void *data, int size)
72{
73 int r;
74
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 }
81
82 trace_data_size += r;
83
84 return r;
85}
86
87/* If it fails, the next read will report it */
88static void skip(int size)
89{
90 char buf[BUFSIZ];
91 int r;
92
93 while (size) {
94 r = size > BUFSIZ ? BUFSIZ : size;
95 do_read(buf, r);
96 size -= r;
97 };
98}
99
100static unsigned int read4(struct pevent *pevent)
101{
102 unsigned int data;
103
104 if (do_read(&data, 4) < 0)
105 return 0;
106 return __data2host4(pevent, data);
107}
108
109static unsigned long long read8(struct pevent *pevent)
110{
111 unsigned long long data;
112
113 if (do_read(&data, 8) < 0)
114 return 0;
115 return __data2host8(pevent, data);
116}
117
118static char *read_string(void)
119{
120 char buf[BUFSIZ];
121 char *str = NULL;
122 int size = 0;
123 off_t r;
124 char c;
125
126 for (;;) {
127 r = read(input_fd, &c, 1);
128 if (r < 0) {
129 pr_debug("reading input file");
130 goto out;
131 }
132
133 if (!r) {
134 pr_debug("no data");
135 goto out;
136 }
137
138 if (repipe) {
139 int retw = write(STDOUT_FILENO, &c, 1);
140
141 if (retw <= 0 || retw != r) {
142 pr_debug("repiping input file string");
143 goto out;
144 }
145 }
146
147 buf[size++] = c;
148
149 if (!c)
150 break;
151 }
152
153 trace_data_size += size;
154
155 str = malloc(size);
156 if (str)
157 memcpy(str, buf, size);
158out:
159 return str;
160}
161
162static int read_proc_kallsyms(struct pevent *pevent)
163{
164 unsigned int size;
165 char *buf;
166
167 size = read4(pevent);
168 if (!size)
169 return 0;
170
171 buf = malloc(size + 1);
172 if (buf == NULL)
173 return -1;
174
175 if (do_read(buf, size) < 0) {
176 free(buf);
177 return -1;
178 }
179 buf[size] = '\0';
180
181 parse_proc_kallsyms(pevent, buf, size);
182
183 free(buf);
184 return 0;
185}
186
187static int read_ftrace_printk(struct pevent *pevent)
188{
189 unsigned int size;
190 char *buf;
191
192 /* it can have 0 size */
193 size = read4(pevent);
194 if (!size)
195 return 0;
196
197 buf = malloc(size);
198 if (buf == NULL)
199 return -1;
200
201 if (do_read(buf, size) < 0) {
202 free(buf);
203 return -1;
204 }
205
206 parse_ftrace_printk(pevent, buf, size);
207
208 free(buf);
209 return 0;
210}
211
212static int read_header_files(struct pevent *pevent)
213{
214 unsigned long long size;
215 char *header_page;
216 char buf[BUFSIZ];
217 int ret = 0;
218
219 if (do_read(buf, 12) < 0)
220 return -1;
221
222 if (memcmp(buf, "header_page", 12) != 0) {
223 pr_debug("did not read header page");
224 return -1;
225 }
226
227 size = read8(pevent);
228
229 header_page = malloc(size);
230 if (header_page == NULL)
231 return -1;
232
233 if (do_read(header_page, size) < 0) {
234 pr_debug("did not read header page");
235 free(header_page);
236 return -1;
237 }
238
239 if (!pevent_parse_header_page(pevent, header_page, size,
240 pevent_get_long_size(pevent))) {
241 /*
242 * The commit field in the page is of type long,
243 * use that instead, since it represents the kernel.
244 */
245 pevent_set_long_size(pevent, pevent->header_page_size_size);
246 }
247 free(header_page);
248
249 if (do_read(buf, 13) < 0)
250 return -1;
251
252 if (memcmp(buf, "header_event", 13) != 0) {
253 pr_debug("did not read header event");
254 return -1;
255 }
256
257 size = read8(pevent);
258 skip(size);
259
260 return ret;
261}
262
263static int read_ftrace_file(struct pevent *pevent, unsigned long long size)
264{
265 char *buf;
266
267 buf = malloc(size);
268 if (buf == NULL)
269 return -1;
270
271 if (do_read(buf, size) < 0) {
272 free(buf);
273 return -1;
274 }
275
276 parse_ftrace_file(pevent, buf, size);
277 free(buf);
278 return 0;
279}
280
281static int read_event_file(struct pevent *pevent, char *sys,
282 unsigned long long size)
283{
284 char *buf;
285
286 buf = malloc(size);
287 if (buf == NULL)
288 return -1;
289
290 if (do_read(buf, size) < 0) {
291 free(buf);
292 return -1;
293 }
294
295 parse_event_file(pevent, buf, size, sys);
296 free(buf);
297 return 0;
298}
299
300static int read_ftrace_files(struct pevent *pevent)
301{
302 unsigned long long size;
303 int count;
304 int i;
305 int ret;
306
307 count = read4(pevent);
308
309 for (i = 0; i < count; i++) {
310 size = read8(pevent);
311 ret = read_ftrace_file(pevent, size);
312 if (ret)
313 return ret;
314 }
315 return 0;
316}
317
318static int read_event_files(struct pevent *pevent)
319{
320 unsigned long long size;
321 char *sys;
322 int systems;
323 int count;
324 int i,x;
325 int ret;
326
327 systems = read4(pevent);
328
329 for (i = 0; i < systems; i++) {
330 sys = read_string();
331 if (sys == NULL)
332 return -1;
333
334 count = read4(pevent);
335
336 for (x=0; x < count; x++) {
337 size = read8(pevent);
338 ret = read_event_file(pevent, sys, size);
339 if (ret)
340 return ret;
341 }
342 }
343 return 0;
344}
345
346ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe)
347{
348 char buf[BUFSIZ];
349 char test[] = { 23, 8, 68 };
350 char *version;
351 int show_version = 0;
352 int show_funcs = 0;
353 int show_printk = 0;
354 ssize_t size = -1;
355 int file_bigendian;
356 int host_bigendian;
357 int file_long_size;
358 int file_page_size;
359 struct pevent *pevent = NULL;
360 int err;
361
362 repipe = __repipe;
363 input_fd = fd;
364
365 if (do_read(buf, 3) < 0)
366 return -1;
367 if (memcmp(buf, test, 3) != 0) {
368 pr_debug("no trace data in the file");
369 return -1;
370 }
371
372 if (do_read(buf, 7) < 0)
373 return -1;
374 if (memcmp(buf, "tracing", 7) != 0) {
375 pr_debug("not a trace file (missing 'tracing' tag)");
376 return -1;
377 }
378
379 version = read_string();
380 if (version == NULL)
381 return -1;
382 if (show_version)
383 printf("version = %s\n", version);
384 free(version);
385
386 if (do_read(buf, 1) < 0)
387 return -1;
388 file_bigendian = buf[0];
389 host_bigendian = bigendian();
390
391 if (trace_event__init(tevent)) {
392 pr_debug("trace_event__init failed");
393 goto out;
394 }
395
396 pevent = tevent->pevent;
397
398 pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
399 pevent_set_file_bigendian(pevent, file_bigendian);
400 pevent_set_host_bigendian(pevent, host_bigendian);
401
402 if (do_read(buf, 1) < 0)
403 goto out;
404 file_long_size = buf[0];
405
406 file_page_size = read4(pevent);
407 if (!file_page_size)
408 goto out;
409
410 pevent_set_long_size(pevent, file_long_size);
411 pevent_set_page_size(pevent, file_page_size);
412
413 err = read_header_files(pevent);
414 if (err)
415 goto out;
416 err = read_ftrace_files(pevent);
417 if (err)
418 goto out;
419 err = read_event_files(pevent);
420 if (err)
421 goto out;
422 err = read_proc_kallsyms(pevent);
423 if (err)
424 goto out;
425 err = read_ftrace_printk(pevent);
426 if (err)
427 goto out;
428
429 size = trace_data_size;
430 repipe = false;
431
432 if (show_funcs) {
433 pevent_print_funcs(pevent);
434 } else if (show_printk) {
435 pevent_print_printk(pevent);
436 }
437
438 pevent = NULL;
439
440out:
441 if (pevent)
442 trace_event__cleanup(tevent);
443 return size;
444}