utils.cpp revision 942c50d1e5fa92a8e9b5c5a20a6918ee72ee68f2
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <dirent.h> 18#include <errno.h> 19#include <fcntl.h> 20#include <limits.h> 21#include <poll.h> 22#include <signal.h> 23#include <stdarg.h> 24#include <stdio.h> 25#include <stdlib.h> 26#include <string> 27#include <string.h> 28#include <sys/inotify.h> 29#include <sys/stat.h> 30#include <sys/time.h> 31#include <sys/wait.h> 32#include <sys/klog.h> 33#include <time.h> 34#include <unistd.h> 35#include <vector> 36#include <sys/prctl.h> 37 38#define LOG_TAG "dumpstate" 39#include <cutils/debugger.h> 40#include <cutils/log.h> 41#include <cutils/properties.h> 42#include <cutils/sockets.h> 43#include <private/android_filesystem_config.h> 44 45#include <selinux/android.h> 46 47#include "dumpstate.h" 48 49static const int64_t NANOS_PER_SEC = 1000000000; 50 51/* list of native processes to include in the native dumps */ 52static const char* native_processes_to_dump[] = { 53 "/system/bin/audioserver", 54 "/system/bin/cameraserver", 55 "/system/bin/drmserver", 56 "/system/bin/mediaserver", 57 "/system/bin/sdcard", 58 "/system/bin/surfaceflinger", 59 "/system/bin/vehicle_network_service", 60 NULL, 61}; 62 63DurationReporter::DurationReporter(const char *title) { 64 title_ = title; 65 if (title) { 66 started_ = DurationReporter::nanotime(); 67 } 68} 69 70DurationReporter::~DurationReporter() { 71 if (title_) { 72 uint64_t elapsed = DurationReporter::nanotime() - started_; 73 // Use "Yoda grammar" to make it easier to grep|sort sections. 74 printf("------ %.3fs was the duration of '%s' ------\n", 75 (float) elapsed / NANOS_PER_SEC, title_); 76 } 77} 78 79uint64_t DurationReporter::DurationReporter::nanotime() { 80 struct timespec ts; 81 clock_gettime(CLOCK_MONOTONIC, &ts); 82 return (uint64_t) ts.tv_sec * NANOS_PER_SEC + ts.tv_nsec; 83} 84 85void for_each_userid(void (*func)(int), const char *header) { 86 ON_DRY_RUN_RETURN(); 87 DIR *d; 88 struct dirent *de; 89 90 if (header) printf("\n------ %s ------\n", header); 91 func(0); 92 93 if (!(d = opendir("/data/system/users"))) { 94 printf("Failed to open /data/system/users (%s)\n", strerror(errno)); 95 return; 96 } 97 98 while ((de = readdir(d))) { 99 int userid; 100 if (de->d_type != DT_DIR || !(userid = atoi(de->d_name))) { 101 continue; 102 } 103 func(userid); 104 } 105 106 closedir(d); 107} 108 109static void __for_each_pid(void (*helper)(int, const char *, void *), const char *header, void *arg) { 110 DIR *d; 111 struct dirent *de; 112 113 if (!(d = opendir("/proc"))) { 114 printf("Failed to open /proc (%s)\n", strerror(errno)); 115 return; 116 } 117 118 if (header) printf("\n------ %s ------\n", header); 119 while ((de = readdir(d))) { 120 int pid; 121 int fd; 122 char cmdpath[255]; 123 char cmdline[255]; 124 125 if (!(pid = atoi(de->d_name))) { 126 continue; 127 } 128 129 sprintf(cmdpath,"/proc/%d/cmdline", pid); 130 memset(cmdline, 0, sizeof(cmdline)); 131 if ((fd = TEMP_FAILURE_RETRY(open(cmdpath, O_RDONLY | O_CLOEXEC))) < 0) { 132 strcpy(cmdline, "N/A"); 133 } else { 134 read(fd, cmdline, sizeof(cmdline) - 1); 135 close(fd); 136 } 137 helper(pid, cmdline, arg); 138 } 139 140 closedir(d); 141} 142 143static void for_each_pid_helper(int pid, const char *cmdline, void *arg) { 144 for_each_pid_func *func = (for_each_pid_func*) arg; 145 func(pid, cmdline); 146} 147 148void for_each_pid(for_each_pid_func func, const char *header) { 149 ON_DRY_RUN_RETURN(); 150 __for_each_pid(for_each_pid_helper, header, (void *)func); 151} 152 153static void for_each_tid_helper(int pid, const char *cmdline, void *arg) { 154 DIR *d; 155 struct dirent *de; 156 char taskpath[255]; 157 for_each_tid_func *func = (for_each_tid_func *) arg; 158 159 sprintf(taskpath, "/proc/%d/task", pid); 160 161 if (!(d = opendir(taskpath))) { 162 printf("Failed to open %s (%s)\n", taskpath, strerror(errno)); 163 return; 164 } 165 166 func(pid, pid, cmdline); 167 168 while ((de = readdir(d))) { 169 int tid; 170 int fd; 171 char commpath[255]; 172 char comm[255]; 173 174 if (!(tid = atoi(de->d_name))) { 175 continue; 176 } 177 178 if (tid == pid) 179 continue; 180 181 sprintf(commpath,"/proc/%d/comm", tid); 182 memset(comm, 0, sizeof(comm)); 183 if ((fd = TEMP_FAILURE_RETRY(open(commpath, O_RDONLY | O_CLOEXEC))) < 0) { 184 strcpy(comm, "N/A"); 185 } else { 186 char *c; 187 read(fd, comm, sizeof(comm) - 1); 188 close(fd); 189 190 c = strrchr(comm, '\n'); 191 if (c) { 192 *c = '\0'; 193 } 194 } 195 func(pid, tid, comm); 196 } 197 198 closedir(d); 199} 200 201void for_each_tid(for_each_tid_func func, const char *header) { 202 ON_DRY_RUN_RETURN(); 203 __for_each_pid(for_each_tid_helper, header, (void *) func); 204} 205 206void show_wchan(int pid, int tid, const char *name) { 207 ON_DRY_RUN_RETURN(); 208 char path[255]; 209 char buffer[255]; 210 int fd; 211 char name_buffer[255]; 212 213 memset(buffer, 0, sizeof(buffer)); 214 215 sprintf(path, "/proc/%d/wchan", tid); 216 if ((fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_CLOEXEC))) < 0) { 217 printf("Failed to open '%s' (%s)\n", path, strerror(errno)); 218 return; 219 } 220 221 if (read(fd, buffer, sizeof(buffer)) < 0) { 222 printf("Failed to read '%s' (%s)\n", path, strerror(errno)); 223 goto out_close; 224 } 225 226 snprintf(name_buffer, sizeof(name_buffer), "%*s%s", 227 pid == tid ? 0 : 3, "", name); 228 229 printf("%-7d %-32s %s\n", tid, name_buffer, buffer); 230 231out_close: 232 close(fd); 233 return; 234} 235 236void do_dmesg() { 237 const char *title = "KERNEL LOG (dmesg)"; 238 DurationReporter duration_reporter(title); 239 printf("------ %s ------\n", title); 240 241 ON_DRY_RUN_RETURN(); 242 /* Get size of kernel buffer */ 243 int size = klogctl(KLOG_SIZE_BUFFER, NULL, 0); 244 if (size <= 0) { 245 printf("Unexpected klogctl return value: %d\n\n", size); 246 return; 247 } 248 char *buf = (char *) malloc(size + 1); 249 if (buf == NULL) { 250 printf("memory allocation failed\n\n"); 251 return; 252 } 253 int retval = klogctl(KLOG_READ_ALL, buf, size); 254 if (retval < 0) { 255 printf("klogctl failure\n\n"); 256 free(buf); 257 return; 258 } 259 buf[retval] = '\0'; 260 printf("%s\n\n", buf); 261 free(buf); 262 return; 263} 264 265void do_showmap(int pid, const char *name) { 266 char title[255]; 267 char arg[255]; 268 269 sprintf(title, "SHOW MAP %d (%s)", pid, name); 270 sprintf(arg, "%d", pid); 271 run_command(title, 10, SU_PATH, "root", "showmap", arg, NULL); 272} 273 274static int _dump_file_from_fd(const char *title, const char *path, int fd) { 275 if (title) { 276 printf("------ %s (%s", title, path); 277 278 struct stat st; 279 // Only show the modification time of non-device files. 280 size_t path_len = strlen(path); 281 if ((path_len < 6 || memcmp(path, "/proc/", 6)) && 282 (path_len < 5 || memcmp(path, "/sys/", 5)) && 283 (path_len < 3 || memcmp(path, "/d/", 3)) && 284 !fstat(fd, &st)) { 285 char stamp[80]; 286 time_t mtime = st.st_mtime; 287 strftime(stamp, sizeof(stamp), "%Y-%m-%d %H:%M:%S", localtime(&mtime)); 288 printf(": %s", stamp); 289 } 290 printf(") ------\n"); 291 } 292 ON_DRY_RUN({ update_progress(WEIGHT_FILE); close(fd); return 0; }); 293 294 bool newline = false; 295 fd_set read_set; 296 struct timeval tm; 297 while (1) { 298 FD_ZERO(&read_set); 299 FD_SET(fd, &read_set); 300 /* Timeout if no data is read for 30 seconds. */ 301 tm.tv_sec = 30; 302 tm.tv_usec = 0; 303 uint64_t elapsed = DurationReporter::nanotime(); 304 int ret = TEMP_FAILURE_RETRY(select(fd + 1, &read_set, NULL, NULL, &tm)); 305 if (ret == -1) { 306 printf("*** %s: select failed: %s\n", path, strerror(errno)); 307 newline = true; 308 break; 309 } else if (ret == 0) { 310 elapsed = DurationReporter::nanotime() - elapsed; 311 printf("*** %s: Timed out after %.3fs\n", path, 312 (float) elapsed / NANOS_PER_SEC); 313 newline = true; 314 break; 315 } else { 316 char buffer[65536]; 317 ssize_t bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, sizeof(buffer))); 318 if (bytes_read > 0) { 319 fwrite(buffer, bytes_read, 1, stdout); 320 newline = (buffer[bytes_read-1] == '\n'); 321 } else { 322 if (bytes_read == -1) { 323 printf("*** %s: Failed to read from fd: %s", path, strerror(errno)); 324 newline = true; 325 } 326 break; 327 } 328 } 329 } 330 update_progress(WEIGHT_FILE); 331 close(fd); 332 333 if (!newline) printf("\n"); 334 if (title) printf("\n"); 335 return 0; 336} 337 338/* prints the contents of a file */ 339int dump_file(const char *title, const char *path) { 340 DurationReporter duration_reporter(title); 341 int fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC)); 342 if (fd < 0) { 343 int err = errno; 344 printf("*** %s: %s\n", path, strerror(err)); 345 if (title) printf("\n"); 346 return -1; 347 } 348 return _dump_file_from_fd(title, path, fd); 349} 350 351/* calls skip to gate calling dump_from_fd recursively 352 * in the specified directory. dump_from_fd defaults to 353 * dump_file_from_fd above when set to NULL. skip defaults 354 * to false when set to NULL. dump_from_fd will always be 355 * called with title NULL. 356 */ 357int dump_files(const char *title, const char *dir, 358 bool (*skip)(const char *path), 359 int (*dump_from_fd)(const char *title, const char *path, int fd)) { 360 DurationReporter duration_reporter(title); 361 DIR *dirp; 362 struct dirent *d; 363 char *newpath = NULL; 364 const char *slash = "/"; 365 int fd, retval = 0; 366 367 if (title) { 368 printf("------ %s (%s) ------\n", title, dir); 369 } 370 ON_DRY_RUN_RETURN(0); 371 372 if (dir[strlen(dir) - 1] == '/') { 373 ++slash; 374 } 375 dirp = opendir(dir); 376 if (dirp == NULL) { 377 retval = -errno; 378 fprintf(stderr, "%s: %s\n", dir, strerror(errno)); 379 return retval; 380 } 381 382 if (!dump_from_fd) { 383 dump_from_fd = dump_file_from_fd; 384 } 385 for (; ((d = readdir(dirp))); free(newpath), newpath = NULL) { 386 if ((d->d_name[0] == '.') 387 && (((d->d_name[1] == '.') && (d->d_name[2] == '\0')) 388 || (d->d_name[1] == '\0'))) { 389 continue; 390 } 391 asprintf(&newpath, "%s%s%s%s", dir, slash, d->d_name, 392 (d->d_type == DT_DIR) ? "/" : ""); 393 if (!newpath) { 394 retval = -errno; 395 continue; 396 } 397 if (skip && (*skip)(newpath)) { 398 continue; 399 } 400 if (d->d_type == DT_DIR) { 401 int ret = dump_files(NULL, newpath, skip, dump_from_fd); 402 if (ret < 0) { 403 retval = ret; 404 } 405 continue; 406 } 407 fd = TEMP_FAILURE_RETRY(open(newpath, O_RDONLY | O_NONBLOCK | O_CLOEXEC)); 408 if (fd < 0) { 409 retval = fd; 410 printf("*** %s: %s\n", newpath, strerror(errno)); 411 continue; 412 } 413 (*dump_from_fd)(NULL, newpath, fd); 414 } 415 closedir(dirp); 416 if (title) { 417 printf("\n"); 418 } 419 return retval; 420} 421 422/* fd must have been opened with the flag O_NONBLOCK. With this flag set, 423 * it's possible to avoid issues where opening the file itself can get 424 * stuck. 425 */ 426int dump_file_from_fd(const char *title, const char *path, int fd) { 427 int flags = fcntl(fd, F_GETFL); 428 if (flags == -1) { 429 printf("*** %s: failed to get flags on fd %d: %s\n", path, fd, strerror(errno)); 430 close(fd); 431 return -1; 432 } else if (!(flags & O_NONBLOCK)) { 433 printf("*** %s: fd must have O_NONBLOCK set.\n", path); 434 close(fd); 435 return -1; 436 } 437 return _dump_file_from_fd(title, path, fd); 438} 439 440bool waitpid_with_timeout(pid_t pid, int timeout_seconds, int* status) { 441 sigset_t child_mask, old_mask; 442 sigemptyset(&child_mask); 443 sigaddset(&child_mask, SIGCHLD); 444 445 if (sigprocmask(SIG_BLOCK, &child_mask, &old_mask) == -1) { 446 printf("*** sigprocmask failed: %s\n", strerror(errno)); 447 return false; 448 } 449 450 struct timespec ts; 451 ts.tv_sec = timeout_seconds; 452 ts.tv_nsec = 0; 453 int ret = TEMP_FAILURE_RETRY(sigtimedwait(&child_mask, NULL, &ts)); 454 int saved_errno = errno; 455 // Set the signals back the way they were. 456 if (sigprocmask(SIG_SETMASK, &old_mask, NULL) == -1) { 457 printf("*** sigprocmask failed: %s\n", strerror(errno)); 458 if (ret == 0) { 459 return false; 460 } 461 } 462 if (ret == -1) { 463 errno = saved_errno; 464 if (errno == EAGAIN) { 465 errno = ETIMEDOUT; 466 } else { 467 printf("*** sigtimedwait failed: %s\n", strerror(errno)); 468 } 469 return false; 470 } 471 472 pid_t child_pid = waitpid(pid, status, WNOHANG); 473 if (child_pid != pid) { 474 if (child_pid != -1) { 475 printf("*** Waiting for pid %d, got pid %d instead\n", pid, child_pid); 476 } else { 477 printf("*** waitpid failed: %s\n", strerror(errno)); 478 } 479 return false; 480 } 481 return true; 482} 483 484int run_command(const char *title, int timeout_seconds, const char *command, ...) { 485 DurationReporter duration_reporter(title); 486 fflush(stdout); 487 488 const char *args[1024] = {command}; 489 size_t arg; 490 va_list ap; 491 va_start(ap, command); 492 if (title) printf("------ %s (%s", title, command); 493 for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) { 494 args[arg] = va_arg(ap, const char *); 495 if (args[arg] == NULL) break; 496 if (title) printf(" %s", args[arg]); 497 } 498 if (title) printf(") ------\n"); 499 fflush(stdout); 500 501 ON_DRY_RUN({ update_progress(timeout_seconds); va_end(ap); return 0; }); 502 503 int status = run_command_always(title, timeout_seconds, args); 504 va_end(ap); 505 return status; 506} 507 508/* forks a command and waits for it to finish */ 509int run_command_always(const char *title, int timeout_seconds, const char *args[]) { 510 /* TODO: for now we're simplifying the progress calculation by using the timeout as the weight. 511 * It's a good approximation for most cases, except when calling dumpsys, where its weight 512 * should be much higher proportionally to its timeout. */ 513 int weight = timeout_seconds; 514 515 const char *command = args[0]; 516 uint64_t start = DurationReporter::nanotime(); 517 pid_t pid = fork(); 518 519 /* handle error case */ 520 if (pid < 0) { 521 printf("*** fork: %s\n", strerror(errno)); 522 return pid; 523 } 524 525 /* handle child case */ 526 if (pid == 0) { 527 528 /* make sure the child dies when dumpstate dies */ 529 prctl(PR_SET_PDEATHSIG, SIGKILL); 530 531 /* just ignore SIGPIPE, will go down with parent's */ 532 struct sigaction sigact; 533 memset(&sigact, 0, sizeof(sigact)); 534 sigact.sa_handler = SIG_IGN; 535 sigaction(SIGPIPE, &sigact, NULL); 536 537 execvp(command, (char**) args); 538 printf("*** exec(%s): %s\n", command, strerror(errno)); 539 fflush(stdout); 540 _exit(-1); 541 } 542 543 /* handle parent case */ 544 int status; 545 bool ret = waitpid_with_timeout(pid, timeout_seconds, &status); 546 uint64_t elapsed = DurationReporter::nanotime() - start; 547 if (!ret) { 548 if (errno == ETIMEDOUT) { 549 printf("*** %s: Timed out after %.3fs (killing pid %d)\n", command, 550 (float) elapsed / NANOS_PER_SEC, pid); 551 } else { 552 printf("*** %s: Error after %.4fs (killing pid %d)\n", command, 553 (float) elapsed / NANOS_PER_SEC, pid); 554 } 555 kill(pid, SIGTERM); 556 if (!waitpid_with_timeout(pid, 5, NULL)) { 557 kill(pid, SIGKILL); 558 if (!waitpid_with_timeout(pid, 5, NULL)) { 559 printf("*** %s: Cannot kill %d even with SIGKILL.\n", command, pid); 560 } 561 } 562 return -1; 563 } 564 565 if (WIFSIGNALED(status)) { 566 printf("*** %s: Killed by signal %d\n", command, WTERMSIG(status)); 567 } else if (WIFEXITED(status) && WEXITSTATUS(status) > 0) { 568 printf("*** %s: Exit code %d\n", command, WEXITSTATUS(status)); 569 } 570 571 if (weight > 0) { 572 update_progress(weight); 573 } 574 return status; 575} 576 577void send_broadcast(const std::string& action, const std::vector<std::string>& args) { 578 if (args.size() > 1000) { 579 fprintf(stderr, "send_broadcast: too many arguments (%d)\n", (int) args.size()); 580 return; 581 } 582 const char *am_args[1024] = { "/system/bin/am", "broadcast", 583 "--user", "0", "-a", action.c_str() }; 584 size_t am_index = 5; // Starts at the index of last initial value above. 585 for (const std::string& arg : args) { 586 am_args[++am_index] = arg.c_str(); 587 } 588 // Always terminate with NULL. 589 am_args[am_index + 1] = NULL; 590 run_command_always(NULL, 5, am_args); 591} 592 593size_t num_props = 0; 594static char* props[2000]; 595 596static void print_prop(const char *key, const char *name, void *user) { 597 (void) user; 598 if (num_props < sizeof(props) / sizeof(props[0])) { 599 char buf[PROPERTY_KEY_MAX + PROPERTY_VALUE_MAX + 10]; 600 snprintf(buf, sizeof(buf), "[%s]: [%s]\n", key, name); 601 props[num_props++] = strdup(buf); 602 } 603} 604 605static int compare_prop(const void *a, const void *b) { 606 return strcmp(*(char * const *) a, *(char * const *) b); 607} 608 609/* prints all the system properties */ 610void print_properties() { 611 const char* title = "SYSTEM PROPERTIES"; 612 DurationReporter duration_reporter(title); 613 printf("------ %s ------\n", title); 614 ON_DRY_RUN_RETURN(); 615 size_t i; 616 num_props = 0; 617 property_list(print_prop, NULL); 618 qsort(&props, num_props, sizeof(props[0]), compare_prop); 619 620 for (i = 0; i < num_props; ++i) { 621 fputs(props[i], stdout); 622 free(props[i]); 623 } 624 printf("\n"); 625} 626 627/* redirect output to a service control socket */ 628void redirect_to_socket(FILE *redirect, const char *service) { 629 int s = android_get_control_socket(service); 630 if (s < 0) { 631 fprintf(stderr, "android_get_control_socket(%s): %s\n", service, strerror(errno)); 632 exit(1); 633 } 634 fcntl(s, F_SETFD, FD_CLOEXEC); 635 if (listen(s, 4) < 0) { 636 fprintf(stderr, "listen(control socket): %s\n", strerror(errno)); 637 exit(1); 638 } 639 640 struct sockaddr addr; 641 socklen_t alen = sizeof(addr); 642 int fd = accept(s, &addr, &alen); 643 if (fd < 0) { 644 fprintf(stderr, "accept(control socket): %s\n", strerror(errno)); 645 exit(1); 646 } 647 648 fflush(redirect); 649 dup2(fd, fileno(redirect)); 650 close(fd); 651} 652 653/* redirect output to a file */ 654void redirect_to_file(FILE *redirect, char *path) { 655 char *chp = path; 656 657 /* skip initial slash */ 658 if (chp[0] == '/') 659 chp++; 660 661 /* create leading directories, if necessary */ 662 while (chp && chp[0]) { 663 chp = strchr(chp, '/'); 664 if (chp) { 665 *chp = 0; 666 mkdir(path, 0770); /* drwxrwx--- */ 667 *chp++ = '/'; 668 } 669 } 670 671 int fd = TEMP_FAILURE_RETRY(open(path, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 672 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)); 673 if (fd < 0) { 674 fprintf(stderr, "%s: %s\n", path, strerror(errno)); 675 exit(1); 676 } 677 678 TEMP_FAILURE_RETRY(dup2(fd, fileno(redirect))); 679 close(fd); 680} 681 682static bool should_dump_native_traces(const char* path) { 683 for (const char** p = native_processes_to_dump; *p; p++) { 684 if (!strcmp(*p, path)) { 685 return true; 686 } 687 } 688 return false; 689} 690 691/* dump Dalvik and native stack traces, return the trace file location (NULL if none) */ 692const char *dump_traces() { 693 DurationReporter duration_reporter("DUMP TRACES"); 694 ON_DRY_RUN_RETURN(NULL); 695 const char* result = NULL; 696 697 char traces_path[PROPERTY_VALUE_MAX] = ""; 698 property_get("dalvik.vm.stack-trace-file", traces_path, ""); 699 if (!traces_path[0]) return NULL; 700 701 /* move the old traces.txt (if any) out of the way temporarily */ 702 char anr_traces_path[PATH_MAX]; 703 strlcpy(anr_traces_path, traces_path, sizeof(anr_traces_path)); 704 strlcat(anr_traces_path, ".anr", sizeof(anr_traces_path)); 705 if (rename(traces_path, anr_traces_path) && errno != ENOENT) { 706 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, anr_traces_path, strerror(errno)); 707 return NULL; // Can't rename old traces.txt -- no permission? -- leave it alone instead 708 } 709 710 /* create a new, empty traces.txt file to receive stack dumps */ 711 int fd = TEMP_FAILURE_RETRY(open(traces_path, O_CREAT | O_WRONLY | O_TRUNC | O_NOFOLLOW | O_CLOEXEC, 712 0666)); /* -rw-rw-rw- */ 713 if (fd < 0) { 714 fprintf(stderr, "%s: %s\n", traces_path, strerror(errno)); 715 return NULL; 716 } 717 int chmod_ret = fchmod(fd, 0666); 718 if (chmod_ret < 0) { 719 fprintf(stderr, "fchmod on %s failed: %s\n", traces_path, strerror(errno)); 720 close(fd); 721 return NULL; 722 } 723 724 /* Variables below must be initialized before 'goto' statements */ 725 int dalvik_found = 0; 726 int ifd, wfd = -1; 727 728 /* walk /proc and kill -QUIT all Dalvik processes */ 729 DIR *proc = opendir("/proc"); 730 if (proc == NULL) { 731 fprintf(stderr, "/proc: %s\n", strerror(errno)); 732 goto error_close_fd; 733 } 734 735 /* use inotify to find when processes are done dumping */ 736 ifd = inotify_init(); 737 if (ifd < 0) { 738 fprintf(stderr, "inotify_init: %s\n", strerror(errno)); 739 goto error_close_fd; 740 } 741 742 wfd = inotify_add_watch(ifd, traces_path, IN_CLOSE_WRITE); 743 if (wfd < 0) { 744 fprintf(stderr, "inotify_add_watch(%s): %s\n", traces_path, strerror(errno)); 745 goto error_close_ifd; 746 } 747 748 struct dirent *d; 749 while ((d = readdir(proc))) { 750 int pid = atoi(d->d_name); 751 if (pid <= 0) continue; 752 753 char path[PATH_MAX]; 754 char data[PATH_MAX]; 755 snprintf(path, sizeof(path), "/proc/%d/exe", pid); 756 ssize_t len = readlink(path, data, sizeof(data) - 1); 757 if (len <= 0) { 758 continue; 759 } 760 data[len] = '\0'; 761 762 if (!strncmp(data, "/system/bin/app_process", strlen("/system/bin/app_process"))) { 763 /* skip zygote -- it won't dump its stack anyway */ 764 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid); 765 int cfd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_CLOEXEC)); 766 len = read(cfd, data, sizeof(data) - 1); 767 close(cfd); 768 if (len <= 0) { 769 continue; 770 } 771 data[len] = '\0'; 772 if (!strncmp(data, "zygote", strlen("zygote"))) { 773 continue; 774 } 775 776 ++dalvik_found; 777 uint64_t start = DurationReporter::nanotime(); 778 if (kill(pid, SIGQUIT)) { 779 fprintf(stderr, "kill(%d, SIGQUIT): %s\n", pid, strerror(errno)); 780 continue; 781 } 782 783 /* wait for the writable-close notification from inotify */ 784 struct pollfd pfd = { ifd, POLLIN, 0 }; 785 int ret = poll(&pfd, 1, 5000); /* 5 sec timeout */ 786 if (ret < 0) { 787 fprintf(stderr, "poll: %s\n", strerror(errno)); 788 } else if (ret == 0) { 789 fprintf(stderr, "warning: timed out dumping pid %d\n", pid); 790 } else { 791 struct inotify_event ie; 792 read(ifd, &ie, sizeof(ie)); 793 } 794 795 if (lseek(fd, 0, SEEK_END) < 0) { 796 fprintf(stderr, "lseek: %s\n", strerror(errno)); 797 } else { 798 dprintf(fd, "[dump dalvik stack %d: %.3fs elapsed]\n", 799 pid, (float)(DurationReporter::nanotime() - start) / NANOS_PER_SEC); 800 } 801 } else if (should_dump_native_traces(data)) { 802 /* dump native process if appropriate */ 803 if (lseek(fd, 0, SEEK_END) < 0) { 804 fprintf(stderr, "lseek: %s\n", strerror(errno)); 805 } else { 806 static uint16_t timeout_failures = 0; 807 uint64_t start = DurationReporter::nanotime(); 808 809 /* If 3 backtrace dumps fail in a row, consider debuggerd dead. */ 810 if (timeout_failures == 3) { 811 dprintf(fd, "too many stack dump failures, skipping...\n"); 812 } else if (dump_backtrace_to_file_timeout(pid, fd, 20) == -1) { 813 dprintf(fd, "dumping failed, likely due to a timeout\n"); 814 timeout_failures++; 815 } else { 816 timeout_failures = 0; 817 } 818 dprintf(fd, "[dump native stack %d: %.3fs elapsed]\n", 819 pid, (float)(DurationReporter::nanotime() - start) / NANOS_PER_SEC); 820 } 821 } 822 } 823 824 if (dalvik_found == 0) { 825 fprintf(stderr, "Warning: no Dalvik processes found to dump stacks\n"); 826 } 827 828 static char dump_traces_path[PATH_MAX]; 829 strlcpy(dump_traces_path, traces_path, sizeof(dump_traces_path)); 830 strlcat(dump_traces_path, ".bugreport", sizeof(dump_traces_path)); 831 if (rename(traces_path, dump_traces_path)) { 832 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, dump_traces_path, strerror(errno)); 833 goto error_close_ifd; 834 } 835 result = dump_traces_path; 836 837 /* replace the saved [ANR] traces.txt file */ 838 rename(anr_traces_path, traces_path); 839 840error_close_ifd: 841 close(ifd); 842error_close_fd: 843 close(fd); 844 return result; 845} 846 847void dump_route_tables() { 848 DurationReporter duration_reporter("DUMP ROUTE TABLES"); 849 ON_DRY_RUN_RETURN(); 850 const char* const RT_TABLES_PATH = "/data/misc/net/rt_tables"; 851 dump_file("RT_TABLES", RT_TABLES_PATH); 852 FILE* fp = fopen(RT_TABLES_PATH, "re"); 853 if (!fp) { 854 printf("*** %s: %s\n", RT_TABLES_PATH, strerror(errno)); 855 return; 856 } 857 char table[16]; 858 // Each line has an integer (the table number), a space, and a string (the table name). We only 859 // need the table number. It's a 32-bit unsigned number, so max 10 chars. Skip the table name. 860 // Add a fixed max limit so this doesn't go awry. 861 for (int i = 0; i < 64 && fscanf(fp, " %10s %*s", table) == 1; ++i) { 862 run_command("ROUTE TABLE IPv4", 10, "ip", "-4", "route", "show", "table", table, NULL); 863 run_command("ROUTE TABLE IPv6", 10, "ip", "-6", "route", "show", "table", table, NULL); 864 } 865 fclose(fp); 866} 867 868/* overall progress */ 869int progress = 0; 870int do_update_progress = 0; // Set by dumpstate.cpp 871int weight_total = WEIGHT_TOTAL; 872 873// TODO: make this function thread safe if sections are generated in parallel. 874void update_progress(int delta) { 875 if (!do_update_progress) return; 876 877 progress += delta; 878 879 char key[PROPERTY_KEY_MAX]; 880 char value[PROPERTY_VALUE_MAX]; 881 882 // adjusts max on the fly 883 if (progress > weight_total) { 884 int new_total = weight_total * 1.2; 885 fprintf(stderr, "Adjusting total weight from %d to %d\n", weight_total, new_total); 886 weight_total = new_total; 887 sprintf(key, "dumpstate.%d.max", getpid()); 888 sprintf(value, "%d", weight_total); 889 int status = property_set(key, value); 890 if (status) { 891 ALOGW("Could not update max weight by setting system property %s to %s: %d\n", 892 key, value, status); 893 } 894 } 895 896 sprintf(key, "dumpstate.%d.progress", getpid()); 897 sprintf(value, "%d", progress); 898 899 // stderr is ignored on normal invocations, but useful when calling /system/bin/dumpstate 900 // directly for debuggging. 901 fprintf(stderr, "Setting progress (%s): %s/%d\n", key, value, weight_total); 902 903 int status = property_set(key, value); 904 if (status) { 905 ALOGW("Could not update progress by setting system property %s to %s: %d\n", 906 key, value, status); 907 } 908} 909 910void take_screenshot(const std::string& path) { 911 const char *args[] = { "/system/bin/screencap", "-p", path.c_str(), NULL }; 912 run_command_always(NULL, 10, args); 913} 914 915void vibrate(FILE* vibrator, int ms) { 916 fprintf(vibrator, "%d\n", ms); 917 fflush(vibrator); 918} 919 920bool is_dir(const char* pathname) { 921 struct stat info; 922 if (stat(pathname, &info) == -1) { 923 return false; 924 } 925 return S_ISDIR(info.st_mode); 926} 927 928time_t get_mtime(int fd, time_t default_mtime) { 929 struct stat info; 930 if (fstat(fd, &info) == -1) { 931 return default_mtime; 932 } 933 return info.st_mtime; 934} 935 936void dump_emmc_ecsd(const char *ext_csd_path) { 937 static const size_t EXT_CSD_REV = 192; 938 static const size_t EXT_PRE_EOL_INFO = 267; 939 static const size_t EXT_DEVICE_LIFE_TIME_EST_TYP_A = 268; 940 static const size_t EXT_DEVICE_LIFE_TIME_EST_TYP_B = 269; 941 struct hex { 942 char str[2]; 943 } buffer[512]; 944 int fd, ext_csd_rev, ext_pre_eol_info; 945 ssize_t bytes_read; 946 static const char *ver_str[] = { 947 "4.0", "4.1", "4.2", "4.3", "Obsolete", "4.41", "4.5", "5.0" 948 }; 949 static const char *eol_str[] = { 950 "Undefined", 951 "Normal", 952 "Warning (consumed 80% of reserve)", 953 "Urgent (consumed 90% of reserve)" 954 }; 955 956 printf("------ %s Extended CSD ------\n", ext_csd_path); 957 958 fd = TEMP_FAILURE_RETRY(open(ext_csd_path, 959 O_RDONLY | O_NONBLOCK | O_CLOEXEC)); 960 if (fd < 0) { 961 printf("*** %s: %s\n\n", ext_csd_path, strerror(errno)); 962 return; 963 } 964 965 bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, sizeof(buffer))); 966 close(fd); 967 if (bytes_read < 0) { 968 printf("*** %s: %s\n\n", ext_csd_path, strerror(errno)); 969 return; 970 } 971 if (bytes_read < (ssize_t)(EXT_CSD_REV * sizeof(struct hex))) { 972 printf("*** %s: truncated content %zd\n\n", ext_csd_path, bytes_read); 973 return; 974 } 975 976 ext_csd_rev = 0; 977 if (sscanf(buffer[EXT_CSD_REV].str, "%02x", &ext_csd_rev) != 1) { 978 printf("*** %s: EXT_CSD_REV parse error \"%.2s\"\n\n", 979 ext_csd_path, buffer[EXT_CSD_REV].str); 980 return; 981 } 982 983 printf("rev 1.%d (MMC %s)\n", 984 ext_csd_rev, 985 (ext_csd_rev < (int)(sizeof(ver_str) / sizeof(ver_str[0]))) ? 986 ver_str[ext_csd_rev] : 987 "Unknown"); 988 if (ext_csd_rev < 7) { 989 printf("\n"); 990 return; 991 } 992 993 if (bytes_read < (ssize_t)(EXT_PRE_EOL_INFO * sizeof(struct hex))) { 994 printf("*** %s: truncated content %zd\n\n", ext_csd_path, bytes_read); 995 return; 996 } 997 998 ext_pre_eol_info = 0; 999 if (sscanf(buffer[EXT_PRE_EOL_INFO].str, "%02x", &ext_pre_eol_info) != 1) { 1000 printf("*** %s: PRE_EOL_INFO parse error \"%.2s\"\n\n", 1001 ext_csd_path, buffer[EXT_PRE_EOL_INFO].str); 1002 return; 1003 } 1004 printf("PRE_EOL_INFO %d (MMC %s)\n", 1005 ext_pre_eol_info, 1006 eol_str[(ext_pre_eol_info < (int) 1007 (sizeof(eol_str) / sizeof(eol_str[0]))) ? 1008 ext_pre_eol_info : 0]); 1009 1010 for (size_t lifetime = EXT_DEVICE_LIFE_TIME_EST_TYP_A; 1011 lifetime <= EXT_DEVICE_LIFE_TIME_EST_TYP_B; 1012 ++lifetime) { 1013 int ext_device_life_time_est; 1014 static const char *est_str[] = { 1015 "Undefined", 1016 "0-10% of device lifetime used", 1017 "10-20% of device lifetime used", 1018 "20-30% of device lifetime used", 1019 "30-40% of device lifetime used", 1020 "40-50% of device lifetime used", 1021 "50-60% of device lifetime used", 1022 "60-70% of device lifetime used", 1023 "70-80% of device lifetime used", 1024 "80-90% of device lifetime used", 1025 "90-100% of device lifetime used", 1026 "Exceeded the maximum estimated device lifetime", 1027 }; 1028 1029 if (bytes_read < (ssize_t)(lifetime * sizeof(struct hex))) { 1030 printf("*** %s: truncated content %zd\n", ext_csd_path, bytes_read); 1031 break; 1032 } 1033 1034 ext_device_life_time_est = 0; 1035 if (sscanf(buffer[lifetime].str, "%02x", &ext_device_life_time_est) != 1) { 1036 printf("*** %s: DEVICE_LIFE_TIME_EST_TYP_%c parse error \"%.2s\"\n", 1037 ext_csd_path, 1038 (unsigned)(lifetime - EXT_DEVICE_LIFE_TIME_EST_TYP_A) + 'A', 1039 buffer[lifetime].str); 1040 continue; 1041 } 1042 printf("DEVICE_LIFE_TIME_EST_TYP_%c %d (MMC %s)\n", 1043 (unsigned)(lifetime - EXT_DEVICE_LIFE_TIME_EST_TYP_A) + 'A', 1044 ext_device_life_time_est, 1045 est_str[(ext_device_life_time_est < (int) 1046 (sizeof(est_str) / sizeof(est_str[0]))) ? 1047 ext_device_life_time_est : 0]); 1048 } 1049 1050 printf("\n"); 1051} 1052