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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// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
4 */
5#include <dirent.h>
6#include <stdio.h>
7#include <stdlib.h>
8#include <string.h>
9#include <stdarg.h>
10#include <sys/types.h>
11#include <sys/stat.h>
12#include <sys/wait.h>
13#include <sys/mman.h>
14#include <traceevent/event-parse.h>
15#include <fcntl.h>
16#include <unistd.h>
17#include <errno.h>
18
19#include "trace-event.h"
20#include "debug.h"
21#include "util.h"
22
23static int input_fd;
24
25static ssize_t trace_data_size;
26static bool repipe;
27
28static int __do_read(int fd, void *buf, int size)
29{
30 int rsize = size;
31
32 while (size) {
33 int ret = read(fd, buf, size);
34
35 if (ret <= 0)
36 return -1;
37
38 if (repipe) {
39 int retw = write(STDOUT_FILENO, buf, ret);
40
41 if (retw <= 0 || retw != ret) {
42 pr_debug("repiping input file");
43 return -1;
44 }
45 }
46
47 size -= ret;
48 buf += ret;
49 }
50
51 return rsize;
52}
53
54static int do_read(void *data, int size)
55{
56 int r;
57
58 r = __do_read(input_fd, data, size);
59 if (r <= 0) {
60 pr_debug("reading input file (size expected=%d received=%d)",
61 size, r);
62 return -1;
63 }
64
65 trace_data_size += r;
66
67 return r;
68}
69
70/* If it fails, the next read will report it */
71static void skip(int size)
72{
73 char buf[BUFSIZ];
74 int r;
75
76 while (size) {
77 r = size > BUFSIZ ? BUFSIZ : size;
78 do_read(buf, r);
79 size -= r;
80 }
81}
82
83static unsigned int read4(struct tep_handle *pevent)
84{
85 unsigned int data;
86
87 if (do_read(&data, 4) < 0)
88 return 0;
89 return tep_read_number(pevent, &data, 4);
90}
91
92static unsigned long long read8(struct tep_handle *pevent)
93{
94 unsigned long long data;
95
96 if (do_read(&data, 8) < 0)
97 return 0;
98 return tep_read_number(pevent, &data, 8);
99}
100
101static char *read_string(void)
102{
103 char buf[BUFSIZ];
104 char *str = NULL;
105 int size = 0;
106 off_t r;
107 char c;
108
109 for (;;) {
110 r = read(input_fd, &c, 1);
111 if (r < 0) {
112 pr_debug("reading input file");
113 goto out;
114 }
115
116 if (!r) {
117 pr_debug("no data");
118 goto out;
119 }
120
121 if (repipe) {
122 int retw = write(STDOUT_FILENO, &c, 1);
123
124 if (retw <= 0 || retw != r) {
125 pr_debug("repiping input file string");
126 goto out;
127 }
128 }
129
130 buf[size++] = c;
131
132 if (!c)
133 break;
134 }
135
136 trace_data_size += size;
137
138 str = malloc(size);
139 if (str)
140 memcpy(str, buf, size);
141out:
142 return str;
143}
144
145static int read_proc_kallsyms(struct tep_handle *pevent)
146{
147 unsigned int size;
148
149 size = read4(pevent);
150 if (!size)
151 return 0;
152 /*
153 * Just skip it, now that we configure libtraceevent to use the
154 * tools/perf/ symbol resolver.
155 *
156 * We need to skip it so that we can continue parsing old perf.data
157 * files, that contains this /proc/kallsyms payload.
158 *
159 * Newer perf.data files will have just the 4-bytes zeros "kallsyms
160 * payload", so that older tools can continue reading it and interpret
161 * it as "no kallsyms payload is present".
162 */
163 lseek(input_fd, size, SEEK_CUR);
164 trace_data_size += size;
165 return 0;
166}
167
168static int read_ftrace_printk(struct tep_handle *pevent)
169{
170 unsigned int size;
171 char *buf;
172
173 /* it can have 0 size */
174 size = read4(pevent);
175 if (!size)
176 return 0;
177
178 buf = malloc(size + 1);
179 if (buf == NULL)
180 return -1;
181
182 if (do_read(buf, size) < 0) {
183 free(buf);
184 return -1;
185 }
186
187 buf[size] = '\0';
188
189 parse_ftrace_printk(pevent, buf, size);
190
191 free(buf);
192 return 0;
193}
194
195static int read_header_files(struct tep_handle *pevent)
196{
197 unsigned long long size;
198 char *header_page;
199 char buf[BUFSIZ];
200 int ret = 0;
201
202 if (do_read(buf, 12) < 0)
203 return -1;
204
205 if (memcmp(buf, "header_page", 12) != 0) {
206 pr_debug("did not read header page");
207 return -1;
208 }
209
210 size = read8(pevent);
211
212 header_page = malloc(size);
213 if (header_page == NULL)
214 return -1;
215
216 if (do_read(header_page, size) < 0) {
217 pr_debug("did not read header page");
218 free(header_page);
219 return -1;
220 }
221
222 if (!tep_parse_header_page(pevent, header_page, size,
223 tep_get_long_size(pevent))) {
224 /*
225 * The commit field in the page is of type long,
226 * use that instead, since it represents the kernel.
227 */
228 tep_set_long_size(pevent, tep_get_header_page_size(pevent));
229 }
230 free(header_page);
231
232 if (do_read(buf, 13) < 0)
233 return -1;
234
235 if (memcmp(buf, "header_event", 13) != 0) {
236 pr_debug("did not read header event");
237 return -1;
238 }
239
240 size = read8(pevent);
241 skip(size);
242
243 return ret;
244}
245
246static int read_ftrace_file(struct tep_handle *pevent, unsigned long long size)
247{
248 int ret;
249 char *buf;
250
251 buf = malloc(size);
252 if (buf == NULL) {
253 pr_debug("memory allocation failure\n");
254 return -1;
255 }
256
257 ret = do_read(buf, size);
258 if (ret < 0) {
259 pr_debug("error reading ftrace file.\n");
260 goto out;
261 }
262
263 ret = parse_ftrace_file(pevent, buf, size);
264 if (ret < 0)
265 pr_debug("error parsing ftrace file.\n");
266out:
267 free(buf);
268 return ret;
269}
270
271static int read_event_file(struct tep_handle *pevent, char *sys,
272 unsigned long long size)
273{
274 int ret;
275 char *buf;
276
277 buf = malloc(size);
278 if (buf == NULL) {
279 pr_debug("memory allocation failure\n");
280 return -1;
281 }
282
283 ret = do_read(buf, size);
284 if (ret < 0)
285 goto out;
286
287 ret = parse_event_file(pevent, buf, size, sys);
288 if (ret < 0)
289 pr_debug("error parsing event file.\n");
290out:
291 free(buf);
292 return ret;
293}
294
295static int read_ftrace_files(struct tep_handle *pevent)
296{
297 unsigned long long size;
298 int count;
299 int i;
300 int ret;
301
302 count = read4(pevent);
303
304 for (i = 0; i < count; i++) {
305 size = read8(pevent);
306 ret = read_ftrace_file(pevent, size);
307 if (ret)
308 return ret;
309 }
310 return 0;
311}
312
313static int read_event_files(struct tep_handle *pevent)
314{
315 unsigned long long size;
316 char *sys;
317 int systems;
318 int count;
319 int i,x;
320 int ret;
321
322 systems = read4(pevent);
323
324 for (i = 0; i < systems; i++) {
325 sys = read_string();
326 if (sys == NULL)
327 return -1;
328
329 count = read4(pevent);
330
331 for (x=0; x < count; x++) {
332 size = read8(pevent);
333 ret = read_event_file(pevent, sys, size);
334 if (ret) {
335 free(sys);
336 return ret;
337 }
338 }
339 free(sys);
340 }
341 return 0;
342}
343
344static int read_saved_cmdline(struct tep_handle *pevent)
345{
346 unsigned long long size;
347 char *buf;
348 int ret;
349
350 /* it can have 0 size */
351 size = read8(pevent);
352 if (!size)
353 return 0;
354
355 buf = malloc(size + 1);
356 if (buf == NULL) {
357 pr_debug("memory allocation failure\n");
358 return -1;
359 }
360
361 ret = do_read(buf, size);
362 if (ret < 0) {
363 pr_debug("error reading saved cmdlines\n");
364 goto out;
365 }
366 buf[ret] = '\0';
367
368 parse_saved_cmdline(pevent, buf, size);
369 ret = 0;
370out:
371 free(buf);
372 return ret;
373}
374
375ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe)
376{
377 char buf[BUFSIZ];
378 char test[] = { 23, 8, 68 };
379 char *version;
380 int show_version = 0;
381 int show_funcs = 0;
382 int show_printk = 0;
383 ssize_t size = -1;
384 int file_bigendian;
385 int host_bigendian;
386 int file_long_size;
387 int file_page_size;
388 struct tep_handle *pevent = NULL;
389 int err;
390
391 repipe = __repipe;
392 input_fd = fd;
393
394 if (do_read(buf, 3) < 0)
395 return -1;
396 if (memcmp(buf, test, 3) != 0) {
397 pr_debug("no trace data in the file");
398 return -1;
399 }
400
401 if (do_read(buf, 7) < 0)
402 return -1;
403 if (memcmp(buf, "tracing", 7) != 0) {
404 pr_debug("not a trace file (missing 'tracing' tag)");
405 return -1;
406 }
407
408 version = read_string();
409 if (version == NULL)
410 return -1;
411 if (show_version)
412 printf("version = %s\n", version);
413
414 if (do_read(buf, 1) < 0) {
415 free(version);
416 return -1;
417 }
418 file_bigendian = buf[0];
419 host_bigendian = host_is_bigendian() ? 1 : 0;
420
421 if (trace_event__init(tevent)) {
422 pr_debug("trace_event__init failed");
423 goto out;
424 }
425
426 pevent = tevent->pevent;
427
428 tep_set_flag(pevent, TEP_NSEC_OUTPUT);
429 tep_set_file_bigendian(pevent, file_bigendian);
430 tep_set_local_bigendian(pevent, host_bigendian);
431
432 if (do_read(buf, 1) < 0)
433 goto out;
434 file_long_size = buf[0];
435
436 file_page_size = read4(pevent);
437 if (!file_page_size)
438 goto out;
439
440 tep_set_long_size(pevent, file_long_size);
441 tep_set_page_size(pevent, file_page_size);
442
443 err = read_header_files(pevent);
444 if (err)
445 goto out;
446 err = read_ftrace_files(pevent);
447 if (err)
448 goto out;
449 err = read_event_files(pevent);
450 if (err)
451 goto out;
452 err = read_proc_kallsyms(pevent);
453 if (err)
454 goto out;
455 err = read_ftrace_printk(pevent);
456 if (err)
457 goto out;
458 if (atof(version) >= 0.6) {
459 err = read_saved_cmdline(pevent);
460 if (err)
461 goto out;
462 }
463
464 size = trace_data_size;
465 repipe = false;
466
467 if (show_funcs) {
468 tep_print_funcs(pevent);
469 } else if (show_printk) {
470 tep_print_printk(pevent);
471 }
472
473 pevent = NULL;
474
475out:
476 if (pevent)
477 trace_event__cleanup(tevent);
478 free(version);
479 return size;
480}