utils.cpp revision 111b9d06cc0fc72438782c9234f28675e5077ef4
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) : DurationReporter(title, stdout) {} 64 65DurationReporter::DurationReporter(const char *title, FILE *out) { 66 title_ = title; 67 if (title) { 68 started_ = DurationReporter::nanotime(); 69 } 70 out_ = out; 71} 72 73DurationReporter::~DurationReporter() { 74 if (title_) { 75 uint64_t elapsed = DurationReporter::nanotime() - started_; 76 // Use "Yoda grammar" to make it easier to grep|sort sections. 77 if (out_) { 78 fprintf(out_, "------ %.3fs was the duration of '%s' ------\n", 79 (float) elapsed / NANOS_PER_SEC, title_); 80 } else { 81 ALOGD("Duration of '%s': %.3fs\n", title_, (float) elapsed / NANOS_PER_SEC); 82 } 83 } 84} 85 86uint64_t DurationReporter::DurationReporter::nanotime() { 87 struct timespec ts; 88 clock_gettime(CLOCK_MONOTONIC, &ts); 89 return (uint64_t) ts.tv_sec * NANOS_PER_SEC + ts.tv_nsec; 90} 91 92void for_each_userid(void (*func)(int), const char *header) { 93 ON_DRY_RUN_RETURN(); 94 DIR *d; 95 struct dirent *de; 96 97 if (header) printf("\n------ %s ------\n", header); 98 func(0); 99 100 if (!(d = opendir("/data/system/users"))) { 101 printf("Failed to open /data/system/users (%s)\n", strerror(errno)); 102 return; 103 } 104 105 while ((de = readdir(d))) { 106 int userid; 107 if (de->d_type != DT_DIR || !(userid = atoi(de->d_name))) { 108 continue; 109 } 110 func(userid); 111 } 112 113 closedir(d); 114} 115 116static void __for_each_pid(void (*helper)(int, const char *, void *), const char *header, void *arg) { 117 DIR *d; 118 struct dirent *de; 119 120 if (!(d = opendir("/proc"))) { 121 printf("Failed to open /proc (%s)\n", strerror(errno)); 122 return; 123 } 124 125 if (header) printf("\n------ %s ------\n", header); 126 while ((de = readdir(d))) { 127 int pid; 128 int fd; 129 char cmdpath[255]; 130 char cmdline[255]; 131 132 if (!(pid = atoi(de->d_name))) { 133 continue; 134 } 135 136 sprintf(cmdpath,"/proc/%d/cmdline", pid); 137 memset(cmdline, 0, sizeof(cmdline)); 138 if ((fd = TEMP_FAILURE_RETRY(open(cmdpath, O_RDONLY | O_CLOEXEC))) < 0) { 139 strcpy(cmdline, "N/A"); 140 } else { 141 read(fd, cmdline, sizeof(cmdline) - 1); 142 close(fd); 143 } 144 helper(pid, cmdline, arg); 145 } 146 147 closedir(d); 148} 149 150static void for_each_pid_helper(int pid, const char *cmdline, void *arg) { 151 for_each_pid_func *func = (for_each_pid_func*) arg; 152 func(pid, cmdline); 153} 154 155void for_each_pid(for_each_pid_func func, const char *header) { 156 ON_DRY_RUN_RETURN(); 157 __for_each_pid(for_each_pid_helper, header, (void *)func); 158} 159 160static void for_each_tid_helper(int pid, const char *cmdline, void *arg) { 161 DIR *d; 162 struct dirent *de; 163 char taskpath[255]; 164 for_each_tid_func *func = (for_each_tid_func *) arg; 165 166 sprintf(taskpath, "/proc/%d/task", pid); 167 168 if (!(d = opendir(taskpath))) { 169 printf("Failed to open %s (%s)\n", taskpath, strerror(errno)); 170 return; 171 } 172 173 func(pid, pid, cmdline); 174 175 while ((de = readdir(d))) { 176 int tid; 177 int fd; 178 char commpath[255]; 179 char comm[255]; 180 181 if (!(tid = atoi(de->d_name))) { 182 continue; 183 } 184 185 if (tid == pid) 186 continue; 187 188 sprintf(commpath,"/proc/%d/comm", tid); 189 memset(comm, 0, sizeof(comm)); 190 if ((fd = TEMP_FAILURE_RETRY(open(commpath, O_RDONLY | O_CLOEXEC))) < 0) { 191 strcpy(comm, "N/A"); 192 } else { 193 char *c; 194 read(fd, comm, sizeof(comm) - 1); 195 close(fd); 196 197 c = strrchr(comm, '\n'); 198 if (c) { 199 *c = '\0'; 200 } 201 } 202 func(pid, tid, comm); 203 } 204 205 closedir(d); 206} 207 208void for_each_tid(for_each_tid_func func, const char *header) { 209 ON_DRY_RUN_RETURN(); 210 __for_each_pid(for_each_tid_helper, header, (void *) func); 211} 212 213void show_wchan(int pid, int tid, const char *name) { 214 ON_DRY_RUN_RETURN(); 215 char path[255]; 216 char buffer[255]; 217 int fd; 218 char name_buffer[255]; 219 220 memset(buffer, 0, sizeof(buffer)); 221 222 sprintf(path, "/proc/%d/wchan", tid); 223 if ((fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_CLOEXEC))) < 0) { 224 printf("Failed to open '%s' (%s)\n", path, strerror(errno)); 225 return; 226 } 227 228 if (read(fd, buffer, sizeof(buffer)) < 0) { 229 printf("Failed to read '%s' (%s)\n", path, strerror(errno)); 230 goto out_close; 231 } 232 233 snprintf(name_buffer, sizeof(name_buffer), "%*s%s", 234 pid == tid ? 0 : 3, "", name); 235 236 printf("%-7d %-32s %s\n", tid, name_buffer, buffer); 237 238out_close: 239 close(fd); 240 return; 241} 242 243void do_dmesg() { 244 const char *title = "KERNEL LOG (dmesg)"; 245 DurationReporter duration_reporter(title); 246 printf("------ %s ------\n", title); 247 248 ON_DRY_RUN_RETURN(); 249 /* Get size of kernel buffer */ 250 int size = klogctl(KLOG_SIZE_BUFFER, NULL, 0); 251 if (size <= 0) { 252 printf("Unexpected klogctl return value: %d\n\n", size); 253 return; 254 } 255 char *buf = (char *) malloc(size + 1); 256 if (buf == NULL) { 257 printf("memory allocation failed\n\n"); 258 return; 259 } 260 int retval = klogctl(KLOG_READ_ALL, buf, size); 261 if (retval < 0) { 262 printf("klogctl failure\n\n"); 263 free(buf); 264 return; 265 } 266 buf[retval] = '\0'; 267 printf("%s\n\n", buf); 268 free(buf); 269 return; 270} 271 272void do_showmap(int pid, const char *name) { 273 char title[255]; 274 char arg[255]; 275 276 sprintf(title, "SHOW MAP %d (%s)", pid, name); 277 sprintf(arg, "%d", pid); 278 run_command(title, 10, SU_PATH, "root", "showmap", arg, NULL); 279} 280 281static int _dump_file_from_fd(const char *title, const char *path, int fd) { 282 if (title) { 283 printf("------ %s (%s", title, path); 284 285 struct stat st; 286 // Only show the modification time of non-device files. 287 size_t path_len = strlen(path); 288 if ((path_len < 6 || memcmp(path, "/proc/", 6)) && 289 (path_len < 5 || memcmp(path, "/sys/", 5)) && 290 (path_len < 3 || memcmp(path, "/d/", 3)) && 291 !fstat(fd, &st)) { 292 char stamp[80]; 293 time_t mtime = st.st_mtime; 294 strftime(stamp, sizeof(stamp), "%Y-%m-%d %H:%M:%S", localtime(&mtime)); 295 printf(": %s", stamp); 296 } 297 printf(") ------\n"); 298 } 299 ON_DRY_RUN({ update_progress(WEIGHT_FILE); close(fd); return 0; }); 300 301 bool newline = false; 302 fd_set read_set; 303 struct timeval tm; 304 while (1) { 305 FD_ZERO(&read_set); 306 FD_SET(fd, &read_set); 307 /* Timeout if no data is read for 30 seconds. */ 308 tm.tv_sec = 30; 309 tm.tv_usec = 0; 310 uint64_t elapsed = DurationReporter::nanotime(); 311 int ret = TEMP_FAILURE_RETRY(select(fd + 1, &read_set, NULL, NULL, &tm)); 312 if (ret == -1) { 313 printf("*** %s: select failed: %s\n", path, strerror(errno)); 314 newline = true; 315 break; 316 } else if (ret == 0) { 317 elapsed = DurationReporter::nanotime() - elapsed; 318 printf("*** %s: Timed out after %.3fs\n", path, 319 (float) elapsed / NANOS_PER_SEC); 320 newline = true; 321 break; 322 } else { 323 char buffer[65536]; 324 ssize_t bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, sizeof(buffer))); 325 if (bytes_read > 0) { 326 fwrite(buffer, bytes_read, 1, stdout); 327 newline = (buffer[bytes_read-1] == '\n'); 328 } else { 329 if (bytes_read == -1) { 330 printf("*** %s: Failed to read from fd: %s", path, strerror(errno)); 331 newline = true; 332 } 333 break; 334 } 335 } 336 } 337 update_progress(WEIGHT_FILE); 338 close(fd); 339 340 if (!newline) printf("\n"); 341 if (title) printf("\n"); 342 return 0; 343} 344 345/* prints the contents of a file */ 346int dump_file(const char *title, const char *path) { 347 DurationReporter duration_reporter(title); 348 int fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC)); 349 if (fd < 0) { 350 int err = errno; 351 printf("*** %s: %s\n", path, strerror(err)); 352 if (title) printf("\n"); 353 return -1; 354 } 355 return _dump_file_from_fd(title, path, fd); 356} 357 358/* calls skip to gate calling dump_from_fd recursively 359 * in the specified directory. dump_from_fd defaults to 360 * dump_file_from_fd above when set to NULL. skip defaults 361 * to false when set to NULL. dump_from_fd will always be 362 * called with title NULL. 363 */ 364int dump_files(const char *title, const char *dir, 365 bool (*skip)(const char *path), 366 int (*dump_from_fd)(const char *title, const char *path, int fd)) { 367 DurationReporter duration_reporter(title); 368 DIR *dirp; 369 struct dirent *d; 370 char *newpath = NULL; 371 const char *slash = "/"; 372 int fd, retval = 0; 373 374 if (title) { 375 printf("------ %s (%s) ------\n", title, dir); 376 } 377 ON_DRY_RUN_RETURN(0); 378 379 if (dir[strlen(dir) - 1] == '/') { 380 ++slash; 381 } 382 dirp = opendir(dir); 383 if (dirp == NULL) { 384 retval = -errno; 385 fprintf(stderr, "%s: %s\n", dir, strerror(errno)); 386 return retval; 387 } 388 389 if (!dump_from_fd) { 390 dump_from_fd = dump_file_from_fd; 391 } 392 for (; ((d = readdir(dirp))); free(newpath), newpath = NULL) { 393 if ((d->d_name[0] == '.') 394 && (((d->d_name[1] == '.') && (d->d_name[2] == '\0')) 395 || (d->d_name[1] == '\0'))) { 396 continue; 397 } 398 asprintf(&newpath, "%s%s%s%s", dir, slash, d->d_name, 399 (d->d_type == DT_DIR) ? "/" : ""); 400 if (!newpath) { 401 retval = -errno; 402 continue; 403 } 404 if (skip && (*skip)(newpath)) { 405 continue; 406 } 407 if (d->d_type == DT_DIR) { 408 int ret = dump_files(NULL, newpath, skip, dump_from_fd); 409 if (ret < 0) { 410 retval = ret; 411 } 412 continue; 413 } 414 fd = TEMP_FAILURE_RETRY(open(newpath, O_RDONLY | O_NONBLOCK | O_CLOEXEC)); 415 if (fd < 0) { 416 retval = fd; 417 printf("*** %s: %s\n", newpath, strerror(errno)); 418 continue; 419 } 420 (*dump_from_fd)(NULL, newpath, fd); 421 } 422 closedir(dirp); 423 if (title) { 424 printf("\n"); 425 } 426 return retval; 427} 428 429/* fd must have been opened with the flag O_NONBLOCK. With this flag set, 430 * it's possible to avoid issues where opening the file itself can get 431 * stuck. 432 */ 433int dump_file_from_fd(const char *title, const char *path, int fd) { 434 int flags = fcntl(fd, F_GETFL); 435 if (flags == -1) { 436 printf("*** %s: failed to get flags on fd %d: %s\n", path, fd, strerror(errno)); 437 close(fd); 438 return -1; 439 } else if (!(flags & O_NONBLOCK)) { 440 printf("*** %s: fd must have O_NONBLOCK set.\n", path); 441 close(fd); 442 return -1; 443 } 444 return _dump_file_from_fd(title, path, fd); 445} 446 447bool waitpid_with_timeout(pid_t pid, int timeout_seconds, int* status) { 448 sigset_t child_mask, old_mask; 449 sigemptyset(&child_mask); 450 sigaddset(&child_mask, SIGCHLD); 451 452 if (sigprocmask(SIG_BLOCK, &child_mask, &old_mask) == -1) { 453 printf("*** sigprocmask failed: %s\n", strerror(errno)); 454 return false; 455 } 456 457 struct timespec ts; 458 ts.tv_sec = timeout_seconds; 459 ts.tv_nsec = 0; 460 int ret = TEMP_FAILURE_RETRY(sigtimedwait(&child_mask, NULL, &ts)); 461 int saved_errno = errno; 462 // Set the signals back the way they were. 463 if (sigprocmask(SIG_SETMASK, &old_mask, NULL) == -1) { 464 printf("*** sigprocmask failed: %s\n", strerror(errno)); 465 if (ret == 0) { 466 return false; 467 } 468 } 469 if (ret == -1) { 470 errno = saved_errno; 471 if (errno == EAGAIN) { 472 errno = ETIMEDOUT; 473 } else { 474 printf("*** sigtimedwait failed: %s\n", strerror(errno)); 475 } 476 return false; 477 } 478 479 pid_t child_pid = waitpid(pid, status, WNOHANG); 480 if (child_pid != pid) { 481 if (child_pid != -1) { 482 printf("*** Waiting for pid %d, got pid %d instead\n", pid, child_pid); 483 } else { 484 printf("*** waitpid failed: %s\n", strerror(errno)); 485 } 486 return false; 487 } 488 return true; 489} 490 491int run_command(const char *title, int timeout_seconds, const char *command, ...) { 492 DurationReporter duration_reporter(title); 493 fflush(stdout); 494 495 const char *args[1024] = {command}; 496 size_t arg; 497 va_list ap; 498 va_start(ap, command); 499 if (title) printf("------ %s (%s", title, command); 500 for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) { 501 args[arg] = va_arg(ap, const char *); 502 if (args[arg] == NULL) break; 503 if (title) printf(" %s", args[arg]); 504 } 505 if (title) printf(") ------\n"); 506 fflush(stdout); 507 508 ON_DRY_RUN({ update_progress(timeout_seconds); va_end(ap); return 0; }); 509 510 int status = run_command_always(title, timeout_seconds, args); 511 va_end(ap); 512 return status; 513} 514 515/* forks a command and waits for it to finish */ 516int run_command_always(const char *title, int timeout_seconds, const char *args[]) { 517 /* TODO: for now we're simplifying the progress calculation by using the timeout as the weight. 518 * It's a good approximation for most cases, except when calling dumpsys, where its weight 519 * should be much higher proportionally to its timeout. */ 520 int weight = timeout_seconds; 521 522 const char *command = args[0]; 523 uint64_t start = DurationReporter::nanotime(); 524 pid_t pid = fork(); 525 526 /* handle error case */ 527 if (pid < 0) { 528 printf("*** fork: %s\n", strerror(errno)); 529 return pid; 530 } 531 532 /* handle child case */ 533 if (pid == 0) { 534 535 /* make sure the child dies when dumpstate dies */ 536 prctl(PR_SET_PDEATHSIG, SIGKILL); 537 538 /* just ignore SIGPIPE, will go down with parent's */ 539 struct sigaction sigact; 540 memset(&sigact, 0, sizeof(sigact)); 541 sigact.sa_handler = SIG_IGN; 542 sigaction(SIGPIPE, &sigact, NULL); 543 544 execvp(command, (char**) args); 545 printf("*** exec(%s): %s\n", command, strerror(errno)); 546 fflush(stdout); 547 _exit(-1); 548 } 549 550 /* handle parent case */ 551 int status; 552 bool ret = waitpid_with_timeout(pid, timeout_seconds, &status); 553 uint64_t elapsed = DurationReporter::nanotime() - start; 554 if (!ret) { 555 if (errno == ETIMEDOUT) { 556 printf("*** %s: Timed out after %.3fs (killing pid %d)\n", command, 557 (float) elapsed / NANOS_PER_SEC, pid); 558 } else { 559 printf("*** %s: Error after %.4fs (killing pid %d)\n", command, 560 (float) elapsed / NANOS_PER_SEC, pid); 561 } 562 kill(pid, SIGTERM); 563 if (!waitpid_with_timeout(pid, 5, NULL)) { 564 kill(pid, SIGKILL); 565 if (!waitpid_with_timeout(pid, 5, NULL)) { 566 printf("*** %s: Cannot kill %d even with SIGKILL.\n", command, pid); 567 } 568 } 569 return -1; 570 } 571 572 if (WIFSIGNALED(status)) { 573 printf("*** %s: Killed by signal %d\n", command, WTERMSIG(status)); 574 } else if (WIFEXITED(status) && WEXITSTATUS(status) > 0) { 575 printf("*** %s: Exit code %d\n", command, WEXITSTATUS(status)); 576 } 577 578 if (weight > 0) { 579 update_progress(weight); 580 } 581 return status; 582} 583 584void send_broadcast(const std::string& action, const std::vector<std::string>& args) { 585 if (args.size() > 1000) { 586 fprintf(stderr, "send_broadcast: too many arguments (%d)\n", (int) args.size()); 587 return; 588 } 589 const char *am_args[1024] = { "/system/bin/am", "broadcast", 590 "--user", "0", "-a", action.c_str() }; 591 size_t am_index = 5; // Starts at the index of last initial value above. 592 for (const std::string& arg : args) { 593 am_args[++am_index] = arg.c_str(); 594 } 595 // Always terminate with NULL. 596 am_args[am_index + 1] = NULL; 597 run_command_always(NULL, 5, am_args); 598} 599 600size_t num_props = 0; 601static char* props[2000]; 602 603static void print_prop(const char *key, const char *name, void *user) { 604 (void) user; 605 if (num_props < sizeof(props) / sizeof(props[0])) { 606 char buf[PROPERTY_KEY_MAX + PROPERTY_VALUE_MAX + 10]; 607 snprintf(buf, sizeof(buf), "[%s]: [%s]\n", key, name); 608 props[num_props++] = strdup(buf); 609 } 610} 611 612static int compare_prop(const void *a, const void *b) { 613 return strcmp(*(char * const *) a, *(char * const *) b); 614} 615 616/* prints all the system properties */ 617void print_properties() { 618 const char* title = "SYSTEM PROPERTIES"; 619 DurationReporter duration_reporter(title); 620 printf("------ %s ------\n", title); 621 ON_DRY_RUN_RETURN(); 622 size_t i; 623 num_props = 0; 624 property_list(print_prop, NULL); 625 qsort(&props, num_props, sizeof(props[0]), compare_prop); 626 627 for (i = 0; i < num_props; ++i) { 628 fputs(props[i], stdout); 629 free(props[i]); 630 } 631 printf("\n"); 632} 633 634/* redirect output to a service control socket */ 635void redirect_to_socket(FILE *redirect, const char *service) { 636 int s = android_get_control_socket(service); 637 if (s < 0) { 638 fprintf(stderr, "android_get_control_socket(%s): %s\n", service, strerror(errno)); 639 exit(1); 640 } 641 fcntl(s, F_SETFD, FD_CLOEXEC); 642 if (listen(s, 4) < 0) { 643 fprintf(stderr, "listen(control socket): %s\n", strerror(errno)); 644 exit(1); 645 } 646 647 struct sockaddr addr; 648 socklen_t alen = sizeof(addr); 649 int fd = accept(s, &addr, &alen); 650 if (fd < 0) { 651 fprintf(stderr, "accept(control socket): %s\n", strerror(errno)); 652 exit(1); 653 } 654 655 fflush(redirect); 656 dup2(fd, fileno(redirect)); 657 close(fd); 658} 659 660void create_parent_dirs(const char *path) { 661 char *chp = (char*) path; 662 663 /* skip initial slash */ 664 if (chp[0] == '/') 665 chp++; 666 667 /* create leading directories, if necessary */ 668 struct stat dir_stat; 669 while (chp && chp[0]) { 670 chp = strchr(chp, '/'); 671 if (chp) { 672 *chp = 0; 673 if (stat(path, &dir_stat) == -1 || !S_ISDIR(dir_stat.st_mode)) { 674 ALOGI("Creating directory %s\n", path); 675 if (mkdir(path, 0770)) { /* drwxrwx--- */ 676 ALOGE("Unable to create directory %s: %s\n", path, strerror(errno)); 677 } else if (chown(path, AID_SHELL, AID_SHELL)) { 678 ALOGE("Unable to change ownership of dir %s: %s\n", path, strerror(errno)); 679 } 680 } 681 *chp++ = '/'; 682 } 683 } 684} 685 686/* redirect output to a file */ 687void redirect_to_file(FILE *redirect, char *path) { 688 create_parent_dirs(path); 689 690 int fd = TEMP_FAILURE_RETRY(open(path, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_NOFOLLOW, 691 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)); 692 if (fd < 0) { 693 fprintf(stderr, "%s: %s\n", path, strerror(errno)); 694 exit(1); 695 } 696 697 TEMP_FAILURE_RETRY(dup2(fd, fileno(redirect))); 698 close(fd); 699} 700 701static bool should_dump_native_traces(const char* path) { 702 for (const char** p = native_processes_to_dump; *p; p++) { 703 if (!strcmp(*p, path)) { 704 return true; 705 } 706 } 707 return false; 708} 709 710/* dump Dalvik and native stack traces, return the trace file location (NULL if none) */ 711const char *dump_traces() { 712 DurationReporter duration_reporter("DUMP TRACES", NULL); 713 ON_DRY_RUN_RETURN(NULL); 714 const char* result = NULL; 715 716 char traces_path[PROPERTY_VALUE_MAX] = ""; 717 property_get("dalvik.vm.stack-trace-file", traces_path, ""); 718 if (!traces_path[0]) return NULL; 719 720 /* move the old traces.txt (if any) out of the way temporarily */ 721 char anr_traces_path[PATH_MAX]; 722 strlcpy(anr_traces_path, traces_path, sizeof(anr_traces_path)); 723 strlcat(anr_traces_path, ".anr", sizeof(anr_traces_path)); 724 if (rename(traces_path, anr_traces_path) && errno != ENOENT) { 725 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, anr_traces_path, strerror(errno)); 726 return NULL; // Can't rename old traces.txt -- no permission? -- leave it alone instead 727 } 728 729 /* create a new, empty traces.txt file to receive stack dumps */ 730 int fd = TEMP_FAILURE_RETRY(open(traces_path, O_CREAT | O_WRONLY | O_TRUNC | O_NOFOLLOW | O_CLOEXEC, 731 0666)); /* -rw-rw-rw- */ 732 if (fd < 0) { 733 fprintf(stderr, "%s: %s\n", traces_path, strerror(errno)); 734 return NULL; 735 } 736 int chmod_ret = fchmod(fd, 0666); 737 if (chmod_ret < 0) { 738 fprintf(stderr, "fchmod on %s failed: %s\n", traces_path, strerror(errno)); 739 close(fd); 740 return NULL; 741 } 742 743 /* Variables below must be initialized before 'goto' statements */ 744 int dalvik_found = 0; 745 int ifd, wfd = -1; 746 747 /* walk /proc and kill -QUIT all Dalvik processes */ 748 DIR *proc = opendir("/proc"); 749 if (proc == NULL) { 750 fprintf(stderr, "/proc: %s\n", strerror(errno)); 751 goto error_close_fd; 752 } 753 754 /* use inotify to find when processes are done dumping */ 755 ifd = inotify_init(); 756 if (ifd < 0) { 757 fprintf(stderr, "inotify_init: %s\n", strerror(errno)); 758 goto error_close_fd; 759 } 760 761 wfd = inotify_add_watch(ifd, traces_path, IN_CLOSE_WRITE); 762 if (wfd < 0) { 763 fprintf(stderr, "inotify_add_watch(%s): %s\n", traces_path, strerror(errno)); 764 goto error_close_ifd; 765 } 766 767 struct dirent *d; 768 while ((d = readdir(proc))) { 769 int pid = atoi(d->d_name); 770 if (pid <= 0) continue; 771 772 char path[PATH_MAX]; 773 char data[PATH_MAX]; 774 snprintf(path, sizeof(path), "/proc/%d/exe", pid); 775 ssize_t len = readlink(path, data, sizeof(data) - 1); 776 if (len <= 0) { 777 continue; 778 } 779 data[len] = '\0'; 780 781 if (!strncmp(data, "/system/bin/app_process", strlen("/system/bin/app_process"))) { 782 /* skip zygote -- it won't dump its stack anyway */ 783 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid); 784 int cfd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_CLOEXEC)); 785 len = read(cfd, data, sizeof(data) - 1); 786 close(cfd); 787 if (len <= 0) { 788 continue; 789 } 790 data[len] = '\0'; 791 if (!strncmp(data, "zygote", strlen("zygote"))) { 792 continue; 793 } 794 795 ++dalvik_found; 796 uint64_t start = DurationReporter::nanotime(); 797 if (kill(pid, SIGQUIT)) { 798 fprintf(stderr, "kill(%d, SIGQUIT): %s\n", pid, strerror(errno)); 799 continue; 800 } 801 802 /* wait for the writable-close notification from inotify */ 803 struct pollfd pfd = { ifd, POLLIN, 0 }; 804 int ret = poll(&pfd, 1, 5000); /* 5 sec timeout */ 805 if (ret < 0) { 806 fprintf(stderr, "poll: %s\n", strerror(errno)); 807 } else if (ret == 0) { 808 fprintf(stderr, "warning: timed out dumping pid %d\n", pid); 809 } else { 810 struct inotify_event ie; 811 read(ifd, &ie, sizeof(ie)); 812 } 813 814 if (lseek(fd, 0, SEEK_END) < 0) { 815 fprintf(stderr, "lseek: %s\n", strerror(errno)); 816 } else { 817 dprintf(fd, "[dump dalvik stack %d: %.3fs elapsed]\n", 818 pid, (float)(DurationReporter::nanotime() - start) / NANOS_PER_SEC); 819 } 820 } else if (should_dump_native_traces(data)) { 821 /* dump native process if appropriate */ 822 if (lseek(fd, 0, SEEK_END) < 0) { 823 fprintf(stderr, "lseek: %s\n", strerror(errno)); 824 } else { 825 static uint16_t timeout_failures = 0; 826 uint64_t start = DurationReporter::nanotime(); 827 828 /* If 3 backtrace dumps fail in a row, consider debuggerd dead. */ 829 if (timeout_failures == 3) { 830 dprintf(fd, "too many stack dump failures, skipping...\n"); 831 } else if (dump_backtrace_to_file_timeout(pid, fd, 20) == -1) { 832 dprintf(fd, "dumping failed, likely due to a timeout\n"); 833 timeout_failures++; 834 } else { 835 timeout_failures = 0; 836 } 837 dprintf(fd, "[dump native stack %d: %.3fs elapsed]\n", 838 pid, (float)(DurationReporter::nanotime() - start) / NANOS_PER_SEC); 839 } 840 } 841 } 842 843 if (dalvik_found == 0) { 844 fprintf(stderr, "Warning: no Dalvik processes found to dump stacks\n"); 845 } 846 847 static char dump_traces_path[PATH_MAX]; 848 strlcpy(dump_traces_path, traces_path, sizeof(dump_traces_path)); 849 strlcat(dump_traces_path, ".bugreport", sizeof(dump_traces_path)); 850 if (rename(traces_path, dump_traces_path)) { 851 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, dump_traces_path, strerror(errno)); 852 goto error_close_ifd; 853 } 854 result = dump_traces_path; 855 856 /* replace the saved [ANR] traces.txt file */ 857 rename(anr_traces_path, traces_path); 858 859error_close_ifd: 860 close(ifd); 861error_close_fd: 862 close(fd); 863 return result; 864} 865 866void dump_route_tables() { 867 DurationReporter duration_reporter("DUMP ROUTE TABLES"); 868 ON_DRY_RUN_RETURN(); 869 const char* const RT_TABLES_PATH = "/data/misc/net/rt_tables"; 870 dump_file("RT_TABLES", RT_TABLES_PATH); 871 FILE* fp = fopen(RT_TABLES_PATH, "re"); 872 if (!fp) { 873 printf("*** %s: %s\n", RT_TABLES_PATH, strerror(errno)); 874 return; 875 } 876 char table[16]; 877 // Each line has an integer (the table number), a space, and a string (the table name). We only 878 // need the table number. It's a 32-bit unsigned number, so max 10 chars. Skip the table name. 879 // Add a fixed max limit so this doesn't go awry. 880 for (int i = 0; i < 64 && fscanf(fp, " %10s %*s", table) == 1; ++i) { 881 run_command("ROUTE TABLE IPv4", 10, "ip", "-4", "route", "show", "table", table, NULL); 882 run_command("ROUTE TABLE IPv6", 10, "ip", "-6", "route", "show", "table", table, NULL); 883 } 884 fclose(fp); 885} 886 887/* overall progress */ 888int progress = 0; 889int do_update_progress = 0; // Set by dumpstate.cpp 890int weight_total = WEIGHT_TOTAL; 891 892// TODO: make this function thread safe if sections are generated in parallel. 893void update_progress(int delta) { 894 if (!do_update_progress) return; 895 896 progress += delta; 897 898 char key[PROPERTY_KEY_MAX]; 899 char value[PROPERTY_VALUE_MAX]; 900 901 // adjusts max on the fly 902 if (progress > weight_total) { 903 int new_total = weight_total * 1.2; 904 fprintf(stderr, "Adjusting total weight from %d to %d\n", weight_total, new_total); 905 weight_total = new_total; 906 sprintf(key, "dumpstate.%d.max", getpid()); 907 sprintf(value, "%d", weight_total); 908 int status = property_set(key, value); 909 if (status) { 910 ALOGW("Could not update max weight by setting system property %s to %s: %d\n", 911 key, value, status); 912 } 913 } 914 915 sprintf(key, "dumpstate.%d.progress", getpid()); 916 sprintf(value, "%d", progress); 917 918 // stderr is ignored on normal invocations, but useful when calling /system/bin/dumpstate 919 // directly for debuggging. 920 fprintf(stderr, "Setting progress (%s): %s/%d\n", key, value, weight_total); 921 922 int status = property_set(key, value); 923 if (status) { 924 ALOGW("Could not update progress by setting system property %s to %s: %d\n", 925 key, value, status); 926 } 927} 928 929void take_screenshot(const std::string& path) { 930 const char *args[] = { "/system/bin/screencap", "-p", path.c_str(), NULL }; 931 run_command_always(NULL, 10, args); 932} 933 934void vibrate(FILE* vibrator, int ms) { 935 fprintf(vibrator, "%d\n", ms); 936 fflush(vibrator); 937} 938 939bool is_dir(const char* pathname) { 940 struct stat info; 941 if (stat(pathname, &info) == -1) { 942 return false; 943 } 944 return S_ISDIR(info.st_mode); 945} 946 947time_t get_mtime(int fd, time_t default_mtime) { 948 struct stat info; 949 if (fstat(fd, &info) == -1) { 950 return default_mtime; 951 } 952 return info.st_mtime; 953} 954 955void dump_emmc_ecsd(const char *ext_csd_path) { 956 static const size_t EXT_CSD_REV = 192; 957 static const size_t EXT_PRE_EOL_INFO = 267; 958 static const size_t EXT_DEVICE_LIFE_TIME_EST_TYP_A = 268; 959 static const size_t EXT_DEVICE_LIFE_TIME_EST_TYP_B = 269; 960 struct hex { 961 char str[2]; 962 } buffer[512]; 963 int fd, ext_csd_rev, ext_pre_eol_info; 964 ssize_t bytes_read; 965 static const char *ver_str[] = { 966 "4.0", "4.1", "4.2", "4.3", "Obsolete", "4.41", "4.5", "5.0" 967 }; 968 static const char *eol_str[] = { 969 "Undefined", 970 "Normal", 971 "Warning (consumed 80% of reserve)", 972 "Urgent (consumed 90% of reserve)" 973 }; 974 975 printf("------ %s Extended CSD ------\n", ext_csd_path); 976 977 fd = TEMP_FAILURE_RETRY(open(ext_csd_path, 978 O_RDONLY | O_NONBLOCK | O_CLOEXEC)); 979 if (fd < 0) { 980 printf("*** %s: %s\n\n", ext_csd_path, strerror(errno)); 981 return; 982 } 983 984 bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, sizeof(buffer))); 985 close(fd); 986 if (bytes_read < 0) { 987 printf("*** %s: %s\n\n", ext_csd_path, strerror(errno)); 988 return; 989 } 990 if (bytes_read < (ssize_t)(EXT_CSD_REV * sizeof(struct hex))) { 991 printf("*** %s: truncated content %zd\n\n", ext_csd_path, bytes_read); 992 return; 993 } 994 995 ext_csd_rev = 0; 996 if (sscanf(buffer[EXT_CSD_REV].str, "%02x", &ext_csd_rev) != 1) { 997 printf("*** %s: EXT_CSD_REV parse error \"%.2s\"\n\n", 998 ext_csd_path, buffer[EXT_CSD_REV].str); 999 return; 1000 } 1001 1002 printf("rev 1.%d (MMC %s)\n", 1003 ext_csd_rev, 1004 (ext_csd_rev < (int)(sizeof(ver_str) / sizeof(ver_str[0]))) ? 1005 ver_str[ext_csd_rev] : 1006 "Unknown"); 1007 if (ext_csd_rev < 7) { 1008 printf("\n"); 1009 return; 1010 } 1011 1012 if (bytes_read < (ssize_t)(EXT_PRE_EOL_INFO * sizeof(struct hex))) { 1013 printf("*** %s: truncated content %zd\n\n", ext_csd_path, bytes_read); 1014 return; 1015 } 1016 1017 ext_pre_eol_info = 0; 1018 if (sscanf(buffer[EXT_PRE_EOL_INFO].str, "%02x", &ext_pre_eol_info) != 1) { 1019 printf("*** %s: PRE_EOL_INFO parse error \"%.2s\"\n\n", 1020 ext_csd_path, buffer[EXT_PRE_EOL_INFO].str); 1021 return; 1022 } 1023 printf("PRE_EOL_INFO %d (MMC %s)\n", 1024 ext_pre_eol_info, 1025 eol_str[(ext_pre_eol_info < (int) 1026 (sizeof(eol_str) / sizeof(eol_str[0]))) ? 1027 ext_pre_eol_info : 0]); 1028 1029 for (size_t lifetime = EXT_DEVICE_LIFE_TIME_EST_TYP_A; 1030 lifetime <= EXT_DEVICE_LIFE_TIME_EST_TYP_B; 1031 ++lifetime) { 1032 int ext_device_life_time_est; 1033 static const char *est_str[] = { 1034 "Undefined", 1035 "0-10% of device lifetime used", 1036 "10-20% of device lifetime used", 1037 "20-30% of device lifetime used", 1038 "30-40% of device lifetime used", 1039 "40-50% of device lifetime used", 1040 "50-60% of device lifetime used", 1041 "60-70% of device lifetime used", 1042 "70-80% of device lifetime used", 1043 "80-90% of device lifetime used", 1044 "90-100% of device lifetime used", 1045 "Exceeded the maximum estimated device lifetime", 1046 }; 1047 1048 if (bytes_read < (ssize_t)(lifetime * sizeof(struct hex))) { 1049 printf("*** %s: truncated content %zd\n", ext_csd_path, bytes_read); 1050 break; 1051 } 1052 1053 ext_device_life_time_est = 0; 1054 if (sscanf(buffer[lifetime].str, "%02x", &ext_device_life_time_est) != 1) { 1055 printf("*** %s: DEVICE_LIFE_TIME_EST_TYP_%c parse error \"%.2s\"\n", 1056 ext_csd_path, 1057 (unsigned)(lifetime - EXT_DEVICE_LIFE_TIME_EST_TYP_A) + 'A', 1058 buffer[lifetime].str); 1059 continue; 1060 } 1061 printf("DEVICE_LIFE_TIME_EST_TYP_%c %d (MMC %s)\n", 1062 (unsigned)(lifetime - EXT_DEVICE_LIFE_TIME_EST_TYP_A) + 'A', 1063 ext_device_life_time_est, 1064 est_str[(ext_device_life_time_est < (int) 1065 (sizeof(est_str) / sizeof(est_str[0]))) ? 1066 ext_device_life_time_est : 0]); 1067 } 1068 1069 printf("\n"); 1070} 1071