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