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.h> 27 #include <sys/inotify.h> 28 #include <sys/stat.h> 29 #include <sys/time.h> 30 #include <sys/wait.h> 31 #include <sys/klog.h> 32 #include <time.h> 33 #include <unistd.h> 34 #include <sys/prctl.h> 35 36 #include <cutils/debugger.h> 37 #include <cutils/properties.h> 38 #include <cutils/sockets.h> 39 #include <private/android_filesystem_config.h> 40 41 #include "dumpstate.h" 42 43 /* list of native processes to include in the native dumps */ 44 static const char* native_processes_to_dump[] = { 45 "/system/bin/drmserver", 46 "/system/bin/mediaserver", 47 "/system/bin/sdcard", 48 "/system/bin/surfaceflinger", 49 NULL, 50 }; 51 52 static void __for_each_pid(void (*helper)(int, const char *, void *), const char *header, void *arg) { 53 DIR *d; 54 struct dirent *de; 55 56 if (!(d = opendir("/proc"))) { 57 printf("Failed to open /proc (%s)\n", strerror(errno)); 58 return; 59 } 60 61 printf("\n------ %s ------\n", header); 62 while ((de = readdir(d))) { 63 int pid; 64 int fd; 65 char cmdpath[255]; 66 char cmdline[255]; 67 68 if (!(pid = atoi(de->d_name))) { 69 continue; 70 } 71 72 sprintf(cmdpath,"/proc/%d/cmdline", pid); 73 memset(cmdline, 0, sizeof(cmdline)); 74 if ((fd = open(cmdpath, O_RDONLY)) < 0) { 75 strcpy(cmdline, "N/A"); 76 } else { 77 read(fd, cmdline, sizeof(cmdline) - 1); 78 close(fd); 79 } 80 helper(pid, cmdline, arg); 81 } 82 83 closedir(d); 84 } 85 86 static void for_each_pid_helper(int pid, const char *cmdline, void *arg) { 87 for_each_pid_func *func = arg; 88 func(pid, cmdline); 89 } 90 91 void for_each_pid(for_each_pid_func func, const char *header) { 92 __for_each_pid(for_each_pid_helper, header, func); 93 } 94 95 static void for_each_tid_helper(int pid, const char *cmdline, void *arg) { 96 DIR *d; 97 struct dirent *de; 98 char taskpath[255]; 99 for_each_tid_func *func = arg; 100 101 sprintf(taskpath, "/proc/%d/task", pid); 102 103 if (!(d = opendir(taskpath))) { 104 printf("Failed to open %s (%s)\n", taskpath, strerror(errno)); 105 return; 106 } 107 108 func(pid, pid, cmdline); 109 110 while ((de = readdir(d))) { 111 int tid; 112 int fd; 113 char commpath[255]; 114 char comm[255]; 115 116 if (!(tid = atoi(de->d_name))) { 117 continue; 118 } 119 120 if (tid == pid) 121 continue; 122 123 sprintf(commpath,"/proc/%d/comm", tid); 124 memset(comm, 0, sizeof(comm)); 125 if ((fd = open(commpath, O_RDONLY)) < 0) { 126 strcpy(comm, "N/A"); 127 } else { 128 char *c; 129 read(fd, comm, sizeof(comm) - 1); 130 close(fd); 131 132 c = strrchr(comm, '\n'); 133 if (c) { 134 *c = '\0'; 135 } 136 } 137 func(pid, tid, comm); 138 } 139 140 closedir(d); 141 } 142 143 void for_each_tid(for_each_tid_func func, const char *header) { 144 __for_each_pid(for_each_tid_helper, header, func); 145 } 146 147 void show_wchan(int pid, int tid, const char *name) { 148 char path[255]; 149 char buffer[255]; 150 int fd; 151 char name_buffer[255]; 152 153 memset(buffer, 0, sizeof(buffer)); 154 155 sprintf(path, "/proc/%d/wchan", tid); 156 if ((fd = open(path, O_RDONLY)) < 0) { 157 printf("Failed to open '%s' (%s)\n", path, strerror(errno)); 158 return; 159 } 160 161 if (read(fd, buffer, sizeof(buffer)) < 0) { 162 printf("Failed to read '%s' (%s)\n", path, strerror(errno)); 163 goto out_close; 164 } 165 166 snprintf(name_buffer, sizeof(name_buffer), "%*s%s", 167 pid == tid ? 0 : 3, "", name); 168 169 printf("%-7d %-32s %s\n", tid, name_buffer, buffer); 170 171 out_close: 172 close(fd); 173 return; 174 } 175 176 void do_dmesg() { 177 printf("------ KERNEL LOG (dmesg) ------\n"); 178 /* Get size of kernel buffer */ 179 int size = klogctl(KLOG_SIZE_BUFFER, NULL, 0); 180 if (size <= 0) { 181 printf("Unexpected klogctl return value: %d\n\n", size); 182 return; 183 } 184 char *buf = (char *) malloc(size + 1); 185 if (buf == NULL) { 186 printf("memory allocation failed\n\n"); 187 return; 188 } 189 int retval = klogctl(KLOG_READ_ALL, buf, size); 190 if (retval < 0) { 191 printf("klogctl failure\n\n"); 192 free(buf); 193 return; 194 } 195 buf[retval] = '\0'; 196 printf("%s\n\n", buf); 197 free(buf); 198 return; 199 } 200 201 void do_showmap(int pid, const char *name) { 202 char title[255]; 203 char arg[255]; 204 205 sprintf(title, "SHOW MAP %d (%s)", pid, name); 206 sprintf(arg, "%d", pid); 207 run_command(title, 10, SU_PATH, "root", "showmap", arg, NULL); 208 } 209 210 /* prints the contents of a file */ 211 int dump_file(const char *title, const char* path) { 212 char buffer[32768]; 213 int fd = open(path, O_RDONLY); 214 if (fd < 0) { 215 int err = errno; 216 if (title) printf("------ %s (%s) ------\n", title, path); 217 printf("*** %s: %s\n", path, strerror(err)); 218 if (title) printf("\n"); 219 return -1; 220 } 221 222 if (title) printf("------ %s (%s", title, path); 223 224 if (title) { 225 struct stat st; 226 if (memcmp(path, "/proc/", 6) && memcmp(path, "/sys/", 5) && !fstat(fd, &st)) { 227 char stamp[80]; 228 time_t mtime = st.st_mtime; 229 strftime(stamp, sizeof(stamp), "%Y-%m-%d %H:%M:%S", localtime(&mtime)); 230 printf(": %s", stamp); 231 } 232 printf(") ------\n"); 233 } 234 235 int newline = 0; 236 for (;;) { 237 int ret = read(fd, buffer, sizeof(buffer)); 238 if (ret > 0) { 239 newline = (buffer[ret - 1] == '\n'); 240 ret = fwrite(buffer, ret, 1, stdout); 241 } 242 if (ret <= 0) break; 243 } 244 245 close(fd); 246 if (!newline) printf("\n"); 247 if (title) printf("\n"); 248 return 0; 249 } 250 251 /* forks a command and waits for it to finish */ 252 int run_command(const char *title, int timeout_seconds, const char *command, ...) { 253 fflush(stdout); 254 clock_t start = clock(); 255 pid_t pid = fork(); 256 257 /* handle error case */ 258 if (pid < 0) { 259 printf("*** fork: %s\n", strerror(errno)); 260 return pid; 261 } 262 263 /* handle child case */ 264 if (pid == 0) { 265 const char *args[1024] = {command}; 266 size_t arg; 267 268 /* make sure the child dies when dumpstate dies */ 269 prctl(PR_SET_PDEATHSIG, SIGKILL); 270 271 va_list ap; 272 va_start(ap, command); 273 if (title) printf("------ %s (%s", title, command); 274 for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) { 275 args[arg] = va_arg(ap, const char *); 276 if (args[arg] == NULL) break; 277 if (title) printf(" %s", args[arg]); 278 } 279 if (title) printf(") ------\n"); 280 fflush(stdout); 281 282 execvp(command, (char**) args); 283 printf("*** exec(%s): %s\n", command, strerror(errno)); 284 fflush(stdout); 285 _exit(-1); 286 } 287 288 /* handle parent case */ 289 for (;;) { 290 int status; 291 pid_t p = waitpid(pid, &status, WNOHANG); 292 float elapsed = (float) (clock() - start) / CLOCKS_PER_SEC; 293 if (p == pid) { 294 if (WIFSIGNALED(status)) { 295 printf("*** %s: Killed by signal %d\n", command, WTERMSIG(status)); 296 } else if (WIFEXITED(status) && WEXITSTATUS(status) > 0) { 297 printf("*** %s: Exit code %d\n", command, WEXITSTATUS(status)); 298 } 299 if (title) printf("[%s: %.1fs elapsed]\n\n", command, elapsed); 300 return status; 301 } 302 303 if (timeout_seconds && elapsed > timeout_seconds) { 304 printf("*** %s: Timed out after %.1fs (killing pid %d)\n", command, elapsed, pid); 305 kill(pid, SIGTERM); 306 return -1; 307 } 308 309 usleep(100000); // poll every 0.1 sec 310 } 311 } 312 313 size_t num_props = 0; 314 static char* props[2000]; 315 316 static void print_prop(const char *key, const char *name, void *user) { 317 (void) user; 318 if (num_props < sizeof(props) / sizeof(props[0])) { 319 char buf[PROPERTY_KEY_MAX + PROPERTY_VALUE_MAX + 10]; 320 snprintf(buf, sizeof(buf), "[%s]: [%s]\n", key, name); 321 props[num_props++] = strdup(buf); 322 } 323 } 324 325 static int compare_prop(const void *a, const void *b) { 326 return strcmp(*(char * const *) a, *(char * const *) b); 327 } 328 329 /* prints all the system properties */ 330 void print_properties() { 331 size_t i; 332 num_props = 0; 333 property_list(print_prop, NULL); 334 qsort(&props, num_props, sizeof(props[0]), compare_prop); 335 336 printf("------ SYSTEM PROPERTIES ------\n"); 337 for (i = 0; i < num_props; ++i) { 338 fputs(props[i], stdout); 339 free(props[i]); 340 } 341 printf("\n"); 342 } 343 344 /* redirect output to a service control socket */ 345 void redirect_to_socket(FILE *redirect, const char *service) { 346 int s = android_get_control_socket(service); 347 if (s < 0) { 348 fprintf(stderr, "android_get_control_socket(%s): %s\n", service, strerror(errno)); 349 exit(1); 350 } 351 if (listen(s, 4) < 0) { 352 fprintf(stderr, "listen(control socket): %s\n", strerror(errno)); 353 exit(1); 354 } 355 356 struct sockaddr addr; 357 socklen_t alen = sizeof(addr); 358 int fd = accept(s, &addr, &alen); 359 if (fd < 0) { 360 fprintf(stderr, "accept(control socket): %s\n", strerror(errno)); 361 exit(1); 362 } 363 364 fflush(redirect); 365 dup2(fd, fileno(redirect)); 366 close(fd); 367 } 368 369 /* redirect output to a file, optionally gzipping; returns gzip pid (or -1) */ 370 pid_t redirect_to_file(FILE *redirect, char *path, int gzip_level) { 371 char *chp = path; 372 373 /* skip initial slash */ 374 if (chp[0] == '/') 375 chp++; 376 377 /* create leading directories, if necessary */ 378 while (chp && chp[0]) { 379 chp = strchr(chp, '/'); 380 if (chp) { 381 *chp = 0; 382 mkdir(path, 0770); /* drwxrwx--- */ 383 *chp++ = '/'; 384 } 385 } 386 387 int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); 388 if (fd < 0) { 389 fprintf(stderr, "%s: %s\n", path, strerror(errno)); 390 exit(1); 391 } 392 393 pid_t gzip_pid = -1; 394 if (gzip_level > 0) { 395 int fds[2]; 396 if (pipe(fds)) { 397 fprintf(stderr, "pipe: %s\n", strerror(errno)); 398 exit(1); 399 } 400 401 fflush(redirect); 402 fflush(stdout); 403 404 gzip_pid = fork(); 405 if (gzip_pid < 0) { 406 fprintf(stderr, "fork: %s\n", strerror(errno)); 407 exit(1); 408 } 409 410 if (gzip_pid == 0) { 411 dup2(fds[0], STDIN_FILENO); 412 dup2(fd, STDOUT_FILENO); 413 414 close(fd); 415 close(fds[0]); 416 close(fds[1]); 417 418 char level[10]; 419 snprintf(level, sizeof(level), "-%d", gzip_level); 420 execlp("gzip", "gzip", level, NULL); 421 fprintf(stderr, "exec(gzip): %s\n", strerror(errno)); 422 _exit(-1); 423 } 424 425 close(fd); 426 close(fds[0]); 427 fd = fds[1]; 428 } 429 430 dup2(fd, fileno(redirect)); 431 close(fd); 432 return gzip_pid; 433 } 434 435 static bool should_dump_native_traces(const char* path) { 436 for (const char** p = native_processes_to_dump; *p; p++) { 437 if (!strcmp(*p, path)) { 438 return true; 439 } 440 } 441 return false; 442 } 443 444 /* dump Dalvik and native stack traces, return the trace file location (NULL if none) */ 445 const char *dump_traces() { 446 const char* result = NULL; 447 448 char traces_path[PROPERTY_VALUE_MAX] = ""; 449 property_get("dalvik.vm.stack-trace-file", traces_path, ""); 450 if (!traces_path[0]) return NULL; 451 452 /* move the old traces.txt (if any) out of the way temporarily */ 453 char anr_traces_path[PATH_MAX]; 454 strlcpy(anr_traces_path, traces_path, sizeof(anr_traces_path)); 455 strlcat(anr_traces_path, ".anr", sizeof(anr_traces_path)); 456 if (rename(traces_path, anr_traces_path) && errno != ENOENT) { 457 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, anr_traces_path, strerror(errno)); 458 return NULL; // Can't rename old traces.txt -- no permission? -- leave it alone instead 459 } 460 461 /* make the directory if necessary */ 462 char anr_traces_dir[PATH_MAX]; 463 strlcpy(anr_traces_dir, traces_path, sizeof(anr_traces_dir)); 464 char *slash = strrchr(anr_traces_dir, '/'); 465 if (slash != NULL) { 466 *slash = '\0'; 467 if (!mkdir(anr_traces_dir, 0775)) { 468 chown(anr_traces_dir, AID_SYSTEM, AID_SYSTEM); 469 chmod(anr_traces_dir, 0775); 470 } else if (errno != EEXIST) { 471 fprintf(stderr, "mkdir(%s): %s\n", anr_traces_dir, strerror(errno)); 472 return NULL; 473 } 474 } 475 476 /* create a new, empty traces.txt file to receive stack dumps */ 477 int fd = open(traces_path, O_CREAT | O_WRONLY | O_TRUNC | O_NOFOLLOW, 0666); /* -rw-rw-rw- */ 478 if (fd < 0) { 479 fprintf(stderr, "%s: %s\n", traces_path, strerror(errno)); 480 return NULL; 481 } 482 int chmod_ret = fchmod(fd, 0666); 483 if (chmod_ret < 0) { 484 fprintf(stderr, "fchmod on %s failed: %s\n", traces_path, strerror(errno)); 485 close(fd); 486 return NULL; 487 } 488 489 /* walk /proc and kill -QUIT all Dalvik processes */ 490 DIR *proc = opendir("/proc"); 491 if (proc == NULL) { 492 fprintf(stderr, "/proc: %s\n", strerror(errno)); 493 goto error_close_fd; 494 } 495 496 /* use inotify to find when processes are done dumping */ 497 int ifd = inotify_init(); 498 if (ifd < 0) { 499 fprintf(stderr, "inotify_init: %s\n", strerror(errno)); 500 goto error_close_fd; 501 } 502 503 int wfd = inotify_add_watch(ifd, traces_path, IN_CLOSE_WRITE); 504 if (wfd < 0) { 505 fprintf(stderr, "inotify_add_watch(%s): %s\n", traces_path, strerror(errno)); 506 goto error_close_ifd; 507 } 508 509 struct dirent *d; 510 int dalvik_found = 0; 511 while ((d = readdir(proc))) { 512 int pid = atoi(d->d_name); 513 if (pid <= 0) continue; 514 515 char path[PATH_MAX]; 516 char data[PATH_MAX]; 517 snprintf(path, sizeof(path), "/proc/%d/exe", pid); 518 ssize_t len = readlink(path, data, sizeof(data) - 1); 519 if (len <= 0) { 520 continue; 521 } 522 data[len] = '\0'; 523 524 if (!strcmp(data, "/system/bin/app_process")) { 525 /* skip zygote -- it won't dump its stack anyway */ 526 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid); 527 int fd = open(path, O_RDONLY); 528 len = read(fd, data, sizeof(data) - 1); 529 close(fd); 530 if (len <= 0) { 531 continue; 532 } 533 data[len] = '\0'; 534 if (!strcmp(data, "zygote")) { 535 continue; 536 } 537 538 ++dalvik_found; 539 if (kill(pid, SIGQUIT)) { 540 fprintf(stderr, "kill(%d, SIGQUIT): %s\n", pid, strerror(errno)); 541 continue; 542 } 543 544 /* wait for the writable-close notification from inotify */ 545 struct pollfd pfd = { ifd, POLLIN, 0 }; 546 int ret = poll(&pfd, 1, 200); /* 200 msec timeout */ 547 if (ret < 0) { 548 fprintf(stderr, "poll: %s\n", strerror(errno)); 549 } else if (ret == 0) { 550 fprintf(stderr, "warning: timed out dumping pid %d\n", pid); 551 } else { 552 struct inotify_event ie; 553 read(ifd, &ie, sizeof(ie)); 554 } 555 } else if (should_dump_native_traces(data)) { 556 /* dump native process if appropriate */ 557 if (lseek(fd, 0, SEEK_END) < 0) { 558 fprintf(stderr, "lseek: %s\n", strerror(errno)); 559 } else { 560 dump_backtrace_to_file(pid, fd); 561 } 562 } 563 } 564 565 if (dalvik_found == 0) { 566 fprintf(stderr, "Warning: no Dalvik processes found to dump stacks\n"); 567 } 568 569 static char dump_traces_path[PATH_MAX]; 570 strlcpy(dump_traces_path, traces_path, sizeof(dump_traces_path)); 571 strlcat(dump_traces_path, ".bugreport", sizeof(dump_traces_path)); 572 if (rename(traces_path, dump_traces_path)) { 573 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, dump_traces_path, strerror(errno)); 574 goto error_close_ifd; 575 } 576 result = dump_traces_path; 577 578 /* replace the saved [ANR] traces.txt file */ 579 rename(anr_traces_path, traces_path); 580 581 error_close_ifd: 582 close(ifd); 583 error_close_fd: 584 close(fd); 585 return result; 586 } 587 588 void play_sound(const char* path) { 589 run_command(NULL, 5, "/system/bin/stagefright", "-o", "-a", path, NULL); 590 } 591
