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