Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 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 | */ |
Xiao Guangrong | f887f30 | 2010-02-04 16:46:42 +0800 | [diff] [blame] | 21 | #define _FILE_OFFSET_BITS 64 |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 22 | |
| 23 | #include <dirent.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | #include <getopt.h> |
| 28 | #include <stdarg.h> |
| 29 | #include <sys/types.h> |
| 30 | #include <sys/stat.h> |
| 31 | #include <sys/wait.h> |
| 32 | #include <sys/mman.h> |
| 33 | #include <pthread.h> |
| 34 | #include <fcntl.h> |
| 35 | #include <unistd.h> |
| 36 | #include <ctype.h> |
| 37 | #include <errno.h> |
| 38 | |
Frederic Weisbecker | 1ef2ed1 | 2009-08-28 03:09:58 +0200 | [diff] [blame] | 39 | #include "../perf.h" |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 40 | #include "util.h" |
| 41 | #include "trace-event.h" |
| 42 | |
| 43 | static int input_fd; |
| 44 | |
| 45 | static int read_page; |
| 46 | |
| 47 | int file_bigendian; |
| 48 | int host_bigendian; |
| 49 | static int long_size; |
| 50 | |
| 51 | static unsigned long page_size; |
| 52 | |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 53 | static ssize_t calc_data_size; |
| 54 | |
| 55 | static int do_read(int fd, void *buf, int size) |
| 56 | { |
| 57 | int rsize = size; |
| 58 | |
| 59 | while (size) { |
| 60 | int ret = read(fd, buf, size); |
| 61 | |
| 62 | if (ret <= 0) |
| 63 | return -1; |
| 64 | |
| 65 | size -= ret; |
| 66 | buf += ret; |
| 67 | } |
| 68 | |
| 69 | return rsize; |
| 70 | } |
| 71 | |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 72 | static int read_or_die(void *data, int size) |
| 73 | { |
| 74 | int r; |
| 75 | |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 76 | r = do_read(input_fd, data, size); |
| 77 | if (r <= 0) |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 78 | die("reading input file (size expected=%d received=%d)", |
| 79 | size, r); |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 80 | |
| 81 | if (calc_data_size) |
| 82 | calc_data_size += r; |
| 83 | |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 84 | return r; |
| 85 | } |
| 86 | |
| 87 | static unsigned int read4(void) |
| 88 | { |
| 89 | unsigned int data; |
| 90 | |
| 91 | read_or_die(&data, 4); |
| 92 | return __data2host4(data); |
| 93 | } |
| 94 | |
| 95 | static unsigned long long read8(void) |
| 96 | { |
| 97 | unsigned long long data; |
| 98 | |
| 99 | read_or_die(&data, 8); |
| 100 | return __data2host8(data); |
| 101 | } |
| 102 | |
| 103 | static char *read_string(void) |
| 104 | { |
| 105 | char buf[BUFSIZ]; |
| 106 | char *str = NULL; |
| 107 | int size = 0; |
Xiao Guangrong | f887f30 | 2010-02-04 16:46:42 +0800 | [diff] [blame] | 108 | off_t r; |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 109 | char c; |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 110 | |
| 111 | for (;;) { |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 112 | r = read(input_fd, &c, 1); |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 113 | if (r < 0) |
| 114 | die("reading input file"); |
| 115 | |
| 116 | if (!r) |
| 117 | die("no data"); |
| 118 | |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 119 | buf[size++] = c; |
| 120 | |
| 121 | if (!c) |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 122 | break; |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 123 | } |
| 124 | |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 125 | if (calc_data_size) |
| 126 | calc_data_size += size; |
Ingo Molnar | 6f4596d | 2009-09-03 16:22:45 +0200 | [diff] [blame] | 127 | |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 128 | str = malloc_or_die(size); |
| 129 | memcpy(str, buf, size); |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 130 | |
| 131 | return str; |
| 132 | } |
| 133 | |
| 134 | static void read_proc_kallsyms(void) |
| 135 | { |
| 136 | unsigned int size; |
| 137 | char *buf; |
| 138 | |
| 139 | size = read4(); |
| 140 | if (!size) |
| 141 | return; |
| 142 | |
OGAWA Hirofumi | 7691b1e | 2009-12-06 20:10:49 +0900 | [diff] [blame] | 143 | buf = malloc_or_die(size + 1); |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 144 | read_or_die(buf, size); |
OGAWA Hirofumi | 7691b1e | 2009-12-06 20:10:49 +0900 | [diff] [blame] | 145 | buf[size] = '\0'; |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 146 | |
| 147 | parse_proc_kallsyms(buf, size); |
| 148 | |
| 149 | free(buf); |
| 150 | } |
| 151 | |
| 152 | static void read_ftrace_printk(void) |
| 153 | { |
| 154 | unsigned int size; |
| 155 | char *buf; |
| 156 | |
| 157 | size = read4(); |
| 158 | if (!size) |
| 159 | return; |
| 160 | |
| 161 | buf = malloc_or_die(size); |
| 162 | read_or_die(buf, size); |
| 163 | |
| 164 | parse_ftrace_printk(buf, size); |
| 165 | |
| 166 | free(buf); |
| 167 | } |
| 168 | |
| 169 | static void read_header_files(void) |
| 170 | { |
| 171 | unsigned long long size; |
| 172 | char *header_page; |
| 173 | char *header_event; |
| 174 | char buf[BUFSIZ]; |
| 175 | |
| 176 | read_or_die(buf, 12); |
| 177 | |
| 178 | if (memcmp(buf, "header_page", 12) != 0) |
| 179 | die("did not read header page"); |
| 180 | |
| 181 | size = read8(); |
| 182 | header_page = malloc_or_die(size); |
| 183 | read_or_die(header_page, size); |
| 184 | parse_header_page(header_page, size); |
| 185 | free(header_page); |
| 186 | |
| 187 | /* |
| 188 | * The size field in the page is of type long, |
| 189 | * use that instead, since it represents the kernel. |
| 190 | */ |
| 191 | long_size = header_page_size_size; |
| 192 | |
| 193 | read_or_die(buf, 13); |
| 194 | if (memcmp(buf, "header_event", 13) != 0) |
| 195 | die("did not read header event"); |
| 196 | |
| 197 | size = read8(); |
| 198 | header_event = malloc_or_die(size); |
| 199 | read_or_die(header_event, size); |
| 200 | free(header_event); |
| 201 | } |
| 202 | |
| 203 | static void read_ftrace_file(unsigned long long size) |
| 204 | { |
| 205 | char *buf; |
| 206 | |
| 207 | buf = malloc_or_die(size); |
| 208 | read_or_die(buf, size); |
| 209 | parse_ftrace_file(buf, size); |
| 210 | free(buf); |
| 211 | } |
| 212 | |
| 213 | static void read_event_file(char *sys, unsigned long long size) |
| 214 | { |
| 215 | char *buf; |
| 216 | |
| 217 | buf = malloc_or_die(size); |
| 218 | read_or_die(buf, size); |
| 219 | parse_event_file(buf, size, sys); |
| 220 | free(buf); |
| 221 | } |
| 222 | |
| 223 | static void read_ftrace_files(void) |
| 224 | { |
| 225 | unsigned long long size; |
| 226 | int count; |
| 227 | int i; |
| 228 | |
| 229 | count = read4(); |
| 230 | |
| 231 | for (i = 0; i < count; i++) { |
| 232 | size = read8(); |
| 233 | read_ftrace_file(size); |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | static void read_event_files(void) |
| 238 | { |
| 239 | unsigned long long size; |
| 240 | char *sys; |
| 241 | int systems; |
| 242 | int count; |
| 243 | int i,x; |
| 244 | |
| 245 | systems = read4(); |
| 246 | |
| 247 | for (i = 0; i < systems; i++) { |
| 248 | sys = read_string(); |
| 249 | |
| 250 | count = read4(); |
| 251 | for (x=0; x < count; x++) { |
| 252 | size = read8(); |
| 253 | read_event_file(sys, size); |
| 254 | } |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | struct cpu_data { |
| 259 | unsigned long long offset; |
| 260 | unsigned long long size; |
| 261 | unsigned long long timestamp; |
| 262 | struct record *next; |
| 263 | char *page; |
| 264 | int cpu; |
| 265 | int index; |
| 266 | int page_size; |
| 267 | }; |
| 268 | |
| 269 | static struct cpu_data *cpu_data; |
| 270 | |
| 271 | static void update_cpu_data_index(int cpu) |
| 272 | { |
| 273 | cpu_data[cpu].offset += page_size; |
| 274 | cpu_data[cpu].size -= page_size; |
| 275 | cpu_data[cpu].index = 0; |
| 276 | } |
| 277 | |
| 278 | static void get_next_page(int cpu) |
| 279 | { |
Xiao Guangrong | f887f30 | 2010-02-04 16:46:42 +0800 | [diff] [blame] | 280 | off_t save_seek; |
| 281 | off_t ret; |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 282 | |
| 283 | if (!cpu_data[cpu].page) |
| 284 | return; |
| 285 | |
| 286 | if (read_page) { |
| 287 | if (cpu_data[cpu].size <= page_size) { |
| 288 | free(cpu_data[cpu].page); |
| 289 | cpu_data[cpu].page = NULL; |
| 290 | return; |
| 291 | } |
| 292 | |
| 293 | update_cpu_data_index(cpu); |
| 294 | |
| 295 | /* other parts of the code may expect the pointer to not move */ |
Xiao Guangrong | f887f30 | 2010-02-04 16:46:42 +0800 | [diff] [blame] | 296 | save_seek = lseek(input_fd, 0, SEEK_CUR); |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 297 | |
Xiao Guangrong | f887f30 | 2010-02-04 16:46:42 +0800 | [diff] [blame] | 298 | ret = lseek(input_fd, cpu_data[cpu].offset, SEEK_SET); |
| 299 | if (ret == (off_t)-1) |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 300 | die("failed to lseek"); |
| 301 | ret = read(input_fd, cpu_data[cpu].page, page_size); |
| 302 | if (ret < 0) |
| 303 | die("failed to read page"); |
| 304 | |
| 305 | /* reset the file pointer back */ |
Xiao Guangrong | f887f30 | 2010-02-04 16:46:42 +0800 | [diff] [blame] | 306 | lseek(input_fd, save_seek, SEEK_SET); |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 307 | |
| 308 | return; |
| 309 | } |
| 310 | |
| 311 | munmap(cpu_data[cpu].page, page_size); |
| 312 | cpu_data[cpu].page = NULL; |
| 313 | |
| 314 | if (cpu_data[cpu].size <= page_size) |
| 315 | return; |
| 316 | |
| 317 | update_cpu_data_index(cpu); |
| 318 | |
| 319 | cpu_data[cpu].page = mmap(NULL, page_size, PROT_READ, MAP_PRIVATE, |
| 320 | input_fd, cpu_data[cpu].offset); |
| 321 | if (cpu_data[cpu].page == MAP_FAILED) |
| 322 | die("failed to mmap cpu %d at offset 0x%llx", |
| 323 | cpu, cpu_data[cpu].offset); |
| 324 | } |
| 325 | |
| 326 | static unsigned int type_len4host(unsigned int type_len_ts) |
| 327 | { |
| 328 | if (file_bigendian) |
| 329 | return (type_len_ts >> 27) & ((1 << 5) - 1); |
| 330 | else |
| 331 | return type_len_ts & ((1 << 5) - 1); |
| 332 | } |
| 333 | |
| 334 | static unsigned int ts4host(unsigned int type_len_ts) |
| 335 | { |
| 336 | if (file_bigendian) |
| 337 | return type_len_ts & ((1 << 27) - 1); |
| 338 | else |
| 339 | return type_len_ts >> 5; |
| 340 | } |
| 341 | |
| 342 | static int calc_index(void *ptr, int cpu) |
| 343 | { |
| 344 | return (unsigned long)ptr - (unsigned long)cpu_data[cpu].page; |
| 345 | } |
| 346 | |
| 347 | struct record *trace_peek_data(int cpu) |
| 348 | { |
| 349 | struct record *data; |
| 350 | void *page = cpu_data[cpu].page; |
| 351 | int idx = cpu_data[cpu].index; |
| 352 | void *ptr = page + idx; |
| 353 | unsigned long long extend; |
| 354 | unsigned int type_len_ts; |
| 355 | unsigned int type_len; |
| 356 | unsigned int delta; |
| 357 | unsigned int length = 0; |
| 358 | |
| 359 | if (cpu_data[cpu].next) |
| 360 | return cpu_data[cpu].next; |
| 361 | |
| 362 | if (!page) |
| 363 | return NULL; |
| 364 | |
| 365 | if (!idx) { |
| 366 | /* FIXME: handle header page */ |
| 367 | if (header_page_ts_size != 8) |
| 368 | die("expected a long long type for timestamp"); |
| 369 | cpu_data[cpu].timestamp = data2host8(ptr); |
| 370 | ptr += 8; |
| 371 | switch (header_page_size_size) { |
| 372 | case 4: |
| 373 | cpu_data[cpu].page_size = data2host4(ptr); |
| 374 | ptr += 4; |
| 375 | break; |
| 376 | case 8: |
| 377 | cpu_data[cpu].page_size = data2host8(ptr); |
| 378 | ptr += 8; |
| 379 | break; |
| 380 | default: |
| 381 | die("bad long size"); |
| 382 | } |
| 383 | ptr = cpu_data[cpu].page + header_page_data_offset; |
| 384 | } |
| 385 | |
| 386 | read_again: |
| 387 | idx = calc_index(ptr, cpu); |
| 388 | |
| 389 | if (idx >= cpu_data[cpu].page_size) { |
| 390 | get_next_page(cpu); |
| 391 | return trace_peek_data(cpu); |
| 392 | } |
| 393 | |
| 394 | type_len_ts = data2host4(ptr); |
| 395 | ptr += 4; |
| 396 | |
| 397 | type_len = type_len4host(type_len_ts); |
| 398 | delta = ts4host(type_len_ts); |
| 399 | |
| 400 | switch (type_len) { |
| 401 | case RINGBUF_TYPE_PADDING: |
| 402 | if (!delta) |
| 403 | die("error, hit unexpected end of page"); |
| 404 | length = data2host4(ptr); |
| 405 | ptr += 4; |
| 406 | length *= 4; |
| 407 | ptr += length; |
| 408 | goto read_again; |
| 409 | |
| 410 | case RINGBUF_TYPE_TIME_EXTEND: |
| 411 | extend = data2host4(ptr); |
| 412 | ptr += 4; |
| 413 | extend <<= TS_SHIFT; |
| 414 | extend += delta; |
| 415 | cpu_data[cpu].timestamp += extend; |
| 416 | goto read_again; |
| 417 | |
| 418 | case RINGBUF_TYPE_TIME_STAMP: |
| 419 | ptr += 12; |
| 420 | break; |
| 421 | case 0: |
| 422 | length = data2host4(ptr); |
| 423 | ptr += 4; |
| 424 | die("here! length=%d", length); |
| 425 | break; |
| 426 | default: |
| 427 | length = type_len * 4; |
| 428 | break; |
| 429 | } |
| 430 | |
| 431 | cpu_data[cpu].timestamp += delta; |
| 432 | |
| 433 | data = malloc_or_die(sizeof(*data)); |
| 434 | memset(data, 0, sizeof(*data)); |
| 435 | |
| 436 | data->ts = cpu_data[cpu].timestamp; |
| 437 | data->size = length; |
| 438 | data->data = ptr; |
| 439 | ptr += length; |
| 440 | |
| 441 | cpu_data[cpu].index = calc_index(ptr, cpu); |
| 442 | cpu_data[cpu].next = data; |
| 443 | |
| 444 | return data; |
| 445 | } |
| 446 | |
| 447 | struct record *trace_read_data(int cpu) |
| 448 | { |
| 449 | struct record *data; |
| 450 | |
| 451 | data = trace_peek_data(cpu); |
| 452 | cpu_data[cpu].next = NULL; |
| 453 | |
| 454 | return data; |
| 455 | } |
| 456 | |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 457 | ssize_t trace_report(int fd) |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 458 | { |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 459 | char buf[BUFSIZ]; |
| 460 | char test[] = { 23, 8, 68 }; |
| 461 | char *version; |
Ingo Molnar | d9340c1 | 2009-09-12 10:08:34 +0200 | [diff] [blame] | 462 | int show_version = 0; |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 463 | int show_funcs = 0; |
| 464 | int show_printk = 0; |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 465 | ssize_t size; |
| 466 | |
| 467 | calc_data_size = 1; |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 468 | |
Frederic Weisbecker | 03456a1 | 2009-10-06 23:36:47 +0200 | [diff] [blame] | 469 | input_fd = fd; |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 470 | |
| 471 | read_or_die(buf, 3); |
| 472 | if (memcmp(buf, test, 3) != 0) |
Arnaldo Carvalho de Melo | e256136 | 2009-11-21 14:31:26 -0200 | [diff] [blame] | 473 | die("no trace data in the file"); |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 474 | |
| 475 | read_or_die(buf, 7); |
| 476 | if (memcmp(buf, "tracing", 7) != 0) |
Arnaldo Carvalho de Melo | e256136 | 2009-11-21 14:31:26 -0200 | [diff] [blame] | 477 | die("not a trace file (missing 'tracing' tag)"); |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 478 | |
| 479 | version = read_string(); |
Ingo Molnar | d9340c1 | 2009-09-12 10:08:34 +0200 | [diff] [blame] | 480 | if (show_version) |
| 481 | printf("version = %s\n", version); |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 482 | free(version); |
| 483 | |
| 484 | read_or_die(buf, 1); |
| 485 | file_bigendian = buf[0]; |
| 486 | host_bigendian = bigendian(); |
| 487 | |
| 488 | read_or_die(buf, 1); |
| 489 | long_size = buf[0]; |
| 490 | |
| 491 | page_size = read4(); |
| 492 | |
| 493 | read_header_files(); |
| 494 | |
| 495 | read_ftrace_files(); |
| 496 | read_event_files(); |
| 497 | read_proc_kallsyms(); |
| 498 | read_ftrace_printk(); |
| 499 | |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 500 | size = calc_data_size - 1; |
| 501 | calc_data_size = 0; |
| 502 | |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 503 | if (show_funcs) { |
| 504 | print_funcs(); |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 505 | return size; |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 506 | } |
| 507 | if (show_printk) { |
| 508 | print_printk(); |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 509 | return size; |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 510 | } |
| 511 | |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame^] | 512 | return size; |
Steven Rostedt | 538bafb | 2009-08-17 16:18:06 +0200 | [diff] [blame] | 513 | } |