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