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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 | /* * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License (not later!) * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #define _FILE_OFFSET_BITS 64 #include <dirent.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <getopt.h> #include <stdarg.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/wait.h> #include <sys/mman.h> #include <pthread.h> #include <fcntl.h> #include <unistd.h> #include <errno.h> #include "../perf.h" #include "util.h" #include "trace-event.h" static int input_fd; static int read_page; int file_bigendian; int host_bigendian; static int long_size; static unsigned long page_size; static ssize_t calc_data_size; static bool repipe; static int do_read(int fd, void *buf, int size) { int rsize = size; while (size) { int ret = read(fd, buf, size); if (ret <= 0) return -1; if (repipe) { int retw = write(STDOUT_FILENO, buf, ret); if (retw <= 0 || retw != ret) die("repiping input file"); } size -= ret; buf += ret; } return rsize; } static int read_or_die(void *data, int size) { int r; r = do_read(input_fd, data, size); if (r <= 0) die("reading input file (size expected=%d received=%d)", size, r); if (calc_data_size) calc_data_size += r; return r; } /* If it fails, the next read will report it */ static void skip(int size) { char buf[BUFSIZ]; int r; while (size) { r = size > BUFSIZ ? BUFSIZ : size; read_or_die(buf, r); size -= r; }; } static unsigned int read4(void) { unsigned int data; read_or_die(&data, 4); return __data2host4(data); } static unsigned long long read8(void) { unsigned long long data; read_or_die(&data, 8); return __data2host8(data); } static char *read_string(void) { char buf[BUFSIZ]; char *str = NULL; int size = 0; off_t r; char c; for (;;) { r = read(input_fd, &c, 1); if (r < 0) die("reading input file"); if (!r) die("no data"); if (repipe) { int retw = write(STDOUT_FILENO, &c, 1); if (retw <= 0 || retw != r) die("repiping input file string"); } buf[size++] = c; if (!c) break; } if (calc_data_size) calc_data_size += size; str = malloc_or_die(size); memcpy(str, buf, size); return str; } static void read_proc_kallsyms(void) { unsigned int size; char *buf; size = read4(); if (!size) return; buf = malloc_or_die(size + 1); read_or_die(buf, size); buf[size] = '\0'; parse_proc_kallsyms(buf, size); free(buf); } static void read_ftrace_printk(void) { unsigned int size; char *buf; size = read4(); if (!size) return; buf = malloc_or_die(size); read_or_die(buf, size); parse_ftrace_printk(buf, size); free(buf); } static void read_header_files(void) { unsigned long long size; char *header_event; char buf[BUFSIZ]; read_or_die(buf, 12); if (memcmp(buf, "header_page", 12) != 0) die("did not read header page"); size = read8(); skip(size); /* * The size field in the page is of type long, * use that instead, since it represents the kernel. */ long_size = header_page_size_size; read_or_die(buf, 13); if (memcmp(buf, "header_event", 13) != 0) die("did not read header event"); size = read8(); header_event = malloc_or_die(size); read_or_die(header_event, size); free(header_event); } static void read_ftrace_file(unsigned long long size) { char *buf; buf = malloc_or_die(size); read_or_die(buf, size); parse_ftrace_file(buf, size); free(buf); } static void read_event_file(char *sys, unsigned long long size) { char *buf; buf = malloc_or_die(size); read_or_die(buf, size); parse_event_file(buf, size, sys); free(buf); } static void read_ftrace_files(void) { unsigned long long size; int count; int i; count = read4(); for (i = 0; i < count; i++) { size = read8(); read_ftrace_file(size); } } static void read_event_files(void) { unsigned long long size; char *sys; int systems; int count; int i,x; systems = read4(); for (i = 0; i < systems; i++) { sys = read_string(); count = read4(); for (x=0; x < count; x++) { size = read8(); read_event_file(sys, size); } } } struct cpu_data { unsigned long long offset; unsigned long long size; unsigned long long timestamp; struct record *next; char *page; int cpu; int index; int page_size; }; static struct cpu_data *cpu_data; static void update_cpu_data_index(int cpu) { cpu_data[cpu].offset += page_size; cpu_data[cpu].size -= page_size; cpu_data[cpu].index = 0; } static void get_next_page(int cpu) { off_t save_seek; off_t ret; if (!cpu_data[cpu].page) return; if (read_page) { if (cpu_data[cpu].size <= page_size) { free(cpu_data[cpu].page); cpu_data[cpu].page = NULL; return; } update_cpu_data_index(cpu); /* other parts of the code may expect the pointer to not move */ save_seek = lseek(input_fd, 0, SEEK_CUR); ret = lseek(input_fd, cpu_data[cpu].offset, SEEK_SET); if (ret == (off_t)-1) die("failed to lseek"); ret = read(input_fd, cpu_data[cpu].page, page_size); if (ret < 0) die("failed to read page"); /* reset the file pointer back */ lseek(input_fd, save_seek, SEEK_SET); return; } munmap(cpu_data[cpu].page, page_size); cpu_data[cpu].page = NULL; if (cpu_data[cpu].size <= page_size) return; update_cpu_data_index(cpu); cpu_data[cpu].page = mmap(NULL, page_size, PROT_READ, MAP_PRIVATE, input_fd, cpu_data[cpu].offset); if (cpu_data[cpu].page == MAP_FAILED) die("failed to mmap cpu %d at offset 0x%llx", cpu, cpu_data[cpu].offset); } static unsigned int type_len4host(unsigned int type_len_ts) { if (file_bigendian) return (type_len_ts >> 27) & ((1 << 5) - 1); else return type_len_ts & ((1 << 5) - 1); } static unsigned int ts4host(unsigned int type_len_ts) { if (file_bigendian) return type_len_ts & ((1 << 27) - 1); else return type_len_ts >> 5; } static int calc_index(void *ptr, int cpu) { return (unsigned long)ptr - (unsigned long)cpu_data[cpu].page; } struct record *trace_peek_data(int cpu) { struct record *data; void *page = cpu_data[cpu].page; int idx = cpu_data[cpu].index; void *ptr = page + idx; unsigned long long extend; unsigned int type_len_ts; unsigned int type_len; unsigned int delta; unsigned int length = 0; if (cpu_data[cpu].next) return cpu_data[cpu].next; if (!page) return NULL; if (!idx) { /* FIXME: handle header page */ if (header_page_ts_size != 8) die("expected a long long type for timestamp"); cpu_data[cpu].timestamp = data2host8(ptr); ptr += 8; switch (header_page_size_size) { case 4: cpu_data[cpu].page_size = data2host4(ptr); ptr += 4; break; case 8: cpu_data[cpu].page_size = data2host8(ptr); ptr += 8; break; default: die("bad long size"); } ptr = cpu_data[cpu].page + header_page_data_offset; } read_again: idx = calc_index(ptr, cpu); if (idx >= cpu_data[cpu].page_size) { get_next_page(cpu); return trace_peek_data(cpu); } type_len_ts = data2host4(ptr); ptr += 4; type_len = type_len4host(type_len_ts); delta = ts4host(type_len_ts); switch (type_len) { case RINGBUF_TYPE_PADDING: if (!delta) die("error, hit unexpected end of page"); length = data2host4(ptr); ptr += 4; length *= 4; ptr += length; goto read_again; case RINGBUF_TYPE_TIME_EXTEND: extend = data2host4(ptr); ptr += 4; extend <<= TS_SHIFT; extend += delta; cpu_data[cpu].timestamp += extend; goto read_again; case RINGBUF_TYPE_TIME_STAMP: ptr += 12; break; case 0: length = data2host4(ptr); ptr += 4; die("here! length=%d", length); break; default: length = type_len * 4; break; } cpu_data[cpu].timestamp += delta; data = malloc_or_die(sizeof(*data)); memset(data, 0, sizeof(*data)); data->ts = cpu_data[cpu].timestamp; data->size = length; data->data = ptr; ptr += length; cpu_data[cpu].index = calc_index(ptr, cpu); cpu_data[cpu].next = data; return data; } struct record *trace_read_data(int cpu) { struct record *data; data = trace_peek_data(cpu); cpu_data[cpu].next = NULL; return data; } ssize_t trace_report(int fd, bool __repipe) { char buf[BUFSIZ]; char test[] = { 23, 8, 68 }; char *version; int show_version = 0; int show_funcs = 0; int show_printk = 0; ssize_t size; calc_data_size = 1; repipe = __repipe; input_fd = fd; read_or_die(buf, 3); if (memcmp(buf, test, 3) != 0) die("no trace data in the file"); read_or_die(buf, 7); if (memcmp(buf, "tracing", 7) != 0) die("not a trace file (missing 'tracing' tag)"); version = read_string(); if (show_version) printf("version = %s\n", version); free(version); read_or_die(buf, 1); file_bigendian = buf[0]; host_bigendian = bigendian(); read_or_die(buf, 1); long_size = buf[0]; page_size = read4(); read_header_files(); read_ftrace_files(); read_event_files(); read_proc_kallsyms(); read_ftrace_printk(); size = calc_data_size - 1; calc_data_size = 0; repipe = false; if (show_funcs) { print_funcs(); return size; } if (show_printk) { print_printk(); return size; } return size; } |