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 SR |
262 | { |
263 | char *buf; | |
264 | ||
a4c98367 NK |
265 | buf = malloc(size); |
266 | if (buf == NULL) | |
267 | return -1; | |
268 | ||
4a31e565 NK |
269 | if (do_read(buf, size) < 0) { |
270 | free(buf); | |
271 | return -1; | |
272 | } | |
273 | ||
da378962 | 274 | parse_ftrace_file(pevent, buf, size); |
538bafb5 | 275 | free(buf); |
a4c98367 | 276 | return 0; |
538bafb5 SR |
277 | } |
278 | ||
a4c98367 | 279 | static int read_event_file(struct pevent *pevent, char *sys, |
da378962 | 280 | unsigned long long size) |
538bafb5 SR |
281 | { |
282 | char *buf; | |
283 | ||
a4c98367 NK |
284 | buf = malloc(size); |
285 | if (buf == NULL) | |
286 | return -1; | |
287 | ||
4a31e565 NK |
288 | if (do_read(buf, size) < 0) { |
289 | free(buf); | |
290 | return -1; | |
291 | } | |
292 | ||
da378962 | 293 | parse_event_file(pevent, buf, size, sys); |
538bafb5 | 294 | free(buf); |
a4c98367 | 295 | return 0; |
538bafb5 SR |
296 | } |
297 | ||
a4c98367 | 298 | static int read_ftrace_files(struct pevent *pevent) |
538bafb5 SR |
299 | { |
300 | unsigned long long size; | |
301 | int count; | |
302 | int i; | |
a4c98367 | 303 | int ret; |
538bafb5 | 304 | |
da378962 | 305 | count = read4(pevent); |
538bafb5 SR |
306 | |
307 | for (i = 0; i < count; i++) { | |
da378962 | 308 | size = read8(pevent); |
a4c98367 NK |
309 | ret = read_ftrace_file(pevent, size); |
310 | if (ret) | |
311 | return ret; | |
538bafb5 | 312 | } |
a4c98367 | 313 | return 0; |
538bafb5 SR |
314 | } |
315 | ||
a4c98367 | 316 | static int read_event_files(struct pevent *pevent) |
538bafb5 SR |
317 | { |
318 | unsigned long long size; | |
319 | char *sys; | |
320 | int systems; | |
321 | int count; | |
322 | int i,x; | |
a4c98367 | 323 | int ret; |
538bafb5 | 324 | |
da378962 | 325 | systems = read4(pevent); |
538bafb5 SR |
326 | |
327 | for (i = 0; i < systems; i++) { | |
328 | sys = read_string(); | |
a4c98367 NK |
329 | if (sys == NULL) |
330 | return -1; | |
538bafb5 | 331 | |
da378962 | 332 | count = read4(pevent); |
4a31e565 | 333 | |
538bafb5 | 334 | for (x=0; x < count; x++) { |
da378962 | 335 | size = read8(pevent); |
a4c98367 NK |
336 | ret = read_event_file(pevent, sys, size); |
337 | if (ret) | |
338 | return ret; | |
538bafb5 SR |
339 | } |
340 | } | |
a4c98367 | 341 | return 0; |
538bafb5 SR |
342 | } |
343 | ||
29f5ffd3 | 344 | ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe) |
538bafb5 | 345 | { |
538bafb5 SR |
346 | char buf[BUFSIZ]; |
347 | char test[] = { 23, 8, 68 }; | |
348 | char *version; | |
d9340c1d | 349 | int show_version = 0; |
538bafb5 SR |
350 | int show_funcs = 0; |
351 | int show_printk = 0; | |
3dce2ce3 | 352 | ssize_t size = -1; |
63af28fa NK |
353 | int file_bigendian; |
354 | int host_bigendian; | |
59657f9c | 355 | int file_long_size; |
30f36762 | 356 | int file_page_size; |
29f5ffd3 | 357 | struct pevent *pevent = NULL; |
a4c98367 | 358 | int err; |
3dce2ce3 | 359 | |
454c407e | 360 | repipe = __repipe; |
03456a15 | 361 | input_fd = fd; |
538bafb5 | 362 | |
4a31e565 NK |
363 | if (do_read(buf, 3) < 0) |
364 | return -1; | |
452958fd NK |
365 | if (memcmp(buf, test, 3) != 0) { |
366 | pr_debug("no trace data in the file"); | |
367 | return -1; | |
368 | } | |
538bafb5 | 369 | |
4a31e565 NK |
370 | if (do_read(buf, 7) < 0) |
371 | return -1; | |
452958fd NK |
372 | if (memcmp(buf, "tracing", 7) != 0) { |
373 | pr_debug("not a trace file (missing 'tracing' tag)"); | |
374 | return -1; | |
375 | } | |
538bafb5 SR |
376 | |
377 | version = read_string(); | |
a4c98367 NK |
378 | if (version == NULL) |
379 | return -1; | |
d9340c1d IM |
380 | if (show_version) |
381 | printf("version = %s\n", version); | |
538bafb5 SR |
382 | free(version); |
383 | ||
4a31e565 NK |
384 | if (do_read(buf, 1) < 0) |
385 | return -1; | |
538bafb5 SR |
386 | file_bigendian = buf[0]; |
387 | host_bigendian = bigendian(); | |
388 | ||
29f5ffd3 JO |
389 | if (trace_event__init(tevent)) { |
390 | pr_debug("trace_event__init failed"); | |
3dce2ce3 NK |
391 | goto out; |
392 | } | |
aaf045f7 | 393 | |
29f5ffd3 JO |
394 | pevent = tevent->pevent; |
395 | ||
396 | pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT); | |
397 | pevent_set_file_bigendian(pevent, file_bigendian); | |
398 | pevent_set_host_bigendian(pevent, host_bigendian); | |
399 | ||
4a31e565 NK |
400 | if (do_read(buf, 1) < 0) |
401 | goto out; | |
59657f9c | 402 | file_long_size = buf[0]; |
538bafb5 | 403 | |
30f36762 NK |
404 | file_page_size = read4(pevent); |
405 | if (!file_page_size) | |
4a31e565 | 406 | goto out; |
538bafb5 | 407 | |
59657f9c | 408 | pevent_set_long_size(pevent, file_long_size); |
30f36762 NK |
409 | pevent_set_page_size(pevent, file_page_size); |
410 | ||
a4c98367 NK |
411 | err = read_header_files(pevent); |
412 | if (err) | |
413 | goto out; | |
414 | err = read_ftrace_files(pevent); | |
415 | if (err) | |
416 | goto out; | |
417 | err = read_event_files(pevent); | |
418 | if (err) | |
419 | goto out; | |
420 | err = read_proc_kallsyms(pevent); | |
421 | if (err) | |
422 | goto out; | |
423 | err = read_ftrace_printk(pevent); | |
424 | if (err) | |
425 | goto out; | |
538bafb5 | 426 | |
ebf3c675 | 427 | size = trace_data_size; |
454c407e | 428 | repipe = false; |
9215545e | 429 | |
538bafb5 | 430 | if (show_funcs) { |
3dce2ce3 NK |
431 | pevent_print_funcs(pevent); |
432 | } else if (show_printk) { | |
433 | pevent_print_printk(pevent); | |
538bafb5 SR |
434 | } |
435 | ||
3dce2ce3 NK |
436 | pevent = NULL; |
437 | ||
438 | out: | |
439 | if (pevent) | |
29f5ffd3 | 440 | trace_event__cleanup(tevent); |
9215545e | 441 | return size; |
538bafb5 | 442 | } |