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 <time.h> 32 #include <unistd.h> 33 34 #include <cutils/properties.h> 35 #include <cutils/sockets.h> 36 #include <private/android_filesystem_config.h> 37 38 #include "dumpstate.h" 39 40 void for_each_pid(void (*func)(int, const char *), const char *header) { 41 DIR *d; 42 struct dirent *de; 43 44 if (!(d = opendir("/proc"))) { 45 printf("Failed to open /proc (%s)\n", strerror(errno)); 46 return; 47 } 48 49 printf("\n------ %s ------\n", header); 50 while ((de = readdir(d))) { 51 int pid; 52 int fd; 53 char cmdpath[255]; 54 char cmdline[255]; 55 56 if (!(pid = atoi(de->d_name))) { 57 continue; 58 } 59 60 sprintf(cmdpath,"/proc/%d/cmdline", pid); 61 memset(cmdline, 0, sizeof(cmdline)); 62 if ((fd = open(cmdpath, O_RDONLY)) < 0) { 63 strcpy(cmdline, "N/A"); 64 } else { 65 read(fd, cmdline, sizeof(cmdline)); 66 close(fd); 67 } 68 func(pid, cmdline); 69 } 70 71 closedir(d); 72 } 73 74 void show_wchan(int pid, const char *name) { 75 char path[255]; 76 char buffer[255]; 77 int fd; 78 79 memset(buffer, 0, sizeof(buffer)); 80 81 sprintf(path, "/proc/%d/wchan", pid); 82 if ((fd = open(path, O_RDONLY)) < 0) { 83 printf("Failed to open '%s' (%s)\n", path, strerror(errno)); 84 return; 85 } 86 87 if (read(fd, buffer, sizeof(buffer)) < 0) { 88 printf("Failed to read '%s' (%s)\n", path, strerror(errno)); 89 goto out_close; 90 } 91 92 printf("%-7d %-32s %s\n", pid, name, buffer); 93 94 out_close: 95 close(fd); 96 return; 97 } 98 99 /* prints the contents of a file */ 100 int dump_file(const char *title, const char* path) { 101 char buffer[32768]; 102 int fd = open(path, O_RDONLY); 103 if (fd < 0) { 104 int err = errno; 105 if (title) printf("------ %s (%s) ------\n", title, path); 106 printf("*** %s: %s\n", path, strerror(err)); 107 if (title) printf("\n"); 108 return -1; 109 } 110 111 if (title) printf("------ %s (%s", title, path); 112 113 if (title) { 114 struct stat st; 115 if (memcmp(path, "/proc/", 6) && memcmp(path, "/sys/", 5) && !fstat(fd, &st)) { 116 char stamp[80]; 117 time_t mtime = st.st_mtime; 118 strftime(stamp, sizeof(stamp), "%Y-%m-%d %H:%M:%S", localtime(&mtime)); 119 printf(": %s", stamp); 120 } 121 printf(") ------\n"); 122 } 123 124 int newline = 0; 125 for (;;) { 126 int ret = read(fd, buffer, sizeof(buffer)); 127 if (ret > 0) { 128 newline = (buffer[ret - 1] == '\n'); 129 ret = fwrite(buffer, ret, 1, stdout); 130 } 131 if (ret <= 0) break; 132 } 133 134 close(fd); 135 if (!newline) printf("\n"); 136 if (title) printf("\n"); 137 return 0; 138 } 139 140 /* forks a command and waits for it to finish */ 141 int run_command(const char *title, int timeout_seconds, const char *command, ...) { 142 fflush(stdout); 143 clock_t start = clock(); 144 pid_t pid = fork(); 145 146 /* handle error case */ 147 if (pid < 0) { 148 printf("*** fork: %s\n", strerror(errno)); 149 return pid; 150 } 151 152 /* handle child case */ 153 if (pid == 0) { 154 const char *args[1024] = {command}; 155 size_t arg; 156 157 va_list ap; 158 va_start(ap, command); 159 if (title) printf("------ %s (%s", title, command); 160 for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) { 161 args[arg] = va_arg(ap, const char *); 162 if (args[arg] == NULL) break; 163 if (title) printf(" %s", args[arg]); 164 } 165 if (title) printf(") ------\n"); 166 fflush(stdout); 167 168 execvp(command, (char**) args); 169 printf("*** exec(%s): %s\n", command, strerror(errno)); 170 fflush(stdout); 171 _exit(-1); 172 } 173 174 /* handle parent case */ 175 for (;;) { 176 int status; 177 pid_t p = waitpid(pid, &status, WNOHANG); 178 float elapsed = (float) (clock() - start) / CLOCKS_PER_SEC; 179 if (p == pid) { 180 if (WIFSIGNALED(status)) { 181 printf("*** %s: Killed by signal %d\n", command, WTERMSIG(status)); 182 } else if (WIFEXITED(status) && WEXITSTATUS(status) > 0) { 183 printf("*** %s: Exit code %d\n", command, WEXITSTATUS(status)); 184 } 185 if (title) printf("[%s: %.1fs elapsed]\n\n", command, elapsed); 186 return status; 187 } 188 189 if (timeout_seconds && elapsed > timeout_seconds) { 190 printf("*** %s: Timed out after %.1fs (killing pid %d)\n", command, elapsed, pid); 191 kill(pid, SIGTERM); 192 return -1; 193 } 194 195 usleep(100000); // poll every 0.1 sec 196 } 197 } 198 199 size_t num_props = 0; 200 static char* props[2000]; 201 202 static void print_prop(const char *key, const char *name, void *user) { 203 (void) user; 204 if (num_props < sizeof(props) / sizeof(props[0])) { 205 char buf[PROPERTY_KEY_MAX + PROPERTY_VALUE_MAX + 10]; 206 snprintf(buf, sizeof(buf), "[%s]: [%s]\n", key, name); 207 props[num_props++] = strdup(buf); 208 } 209 } 210 211 static int compare_prop(const void *a, const void *b) { 212 return strcmp(*(char * const *) a, *(char * const *) b); 213 } 214 215 /* prints all the system properties */ 216 void print_properties() { 217 size_t i; 218 num_props = 0; 219 property_list(print_prop, NULL); 220 qsort(&props, num_props, sizeof(props[0]), compare_prop); 221 222 printf("------ SYSTEM PROPERTIES ------\n"); 223 for (i = 0; i < num_props; ++i) { 224 fputs(props[i], stdout); 225 free(props[i]); 226 } 227 printf("\n"); 228 } 229 230 /* redirect output to a service control socket */ 231 void redirect_to_socket(FILE *redirect, const char *service) { 232 int s = android_get_control_socket(service); 233 if (s < 0) { 234 fprintf(stderr, "android_get_control_socket(%s): %s\n", service, strerror(errno)); 235 exit(1); 236 } 237 if (listen(s, 4) < 0) { 238 fprintf(stderr, "listen(control socket): %s\n", strerror(errno)); 239 exit(1); 240 } 241 242 struct sockaddr addr; 243 socklen_t alen = sizeof(addr); 244 int fd = accept(s, &addr, &alen); 245 if (fd < 0) { 246 fprintf(stderr, "accept(control socket): %s\n", strerror(errno)); 247 exit(1); 248 } 249 250 fflush(redirect); 251 dup2(fd, fileno(redirect)); 252 close(fd); 253 } 254 255 /* redirect output to a file, optionally gzipping; returns gzip pid (or -1) */ 256 pid_t redirect_to_file(FILE *redirect, char *path, int gzip_level) { 257 char *chp = path; 258 259 /* skip initial slash */ 260 if (chp[0] == '/') 261 chp++; 262 263 /* create leading directories, if necessary */ 264 while (chp && chp[0]) { 265 chp = strchr(chp, '/'); 266 if (chp) { 267 *chp = 0; 268 mkdir(path, 0775); /* drwxrwxr-x */ 269 *chp++ = '/'; 270 } 271 } 272 273 int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); 274 if (fd < 0) { 275 fprintf(stderr, "%s: %s\n", path, strerror(errno)); 276 exit(1); 277 } 278 279 pid_t gzip_pid = -1; 280 if (gzip_level > 0) { 281 int fds[2]; 282 if (pipe(fds)) { 283 fprintf(stderr, "pipe: %s\n", strerror(errno)); 284 exit(1); 285 } 286 287 fflush(redirect); 288 fflush(stdout); 289 290 gzip_pid = fork(); 291 if (gzip_pid < 0) { 292 fprintf(stderr, "fork: %s\n", strerror(errno)); 293 exit(1); 294 } 295 296 if (gzip_pid == 0) { 297 dup2(fds[0], STDIN_FILENO); 298 dup2(fd, STDOUT_FILENO); 299 300 close(fd); 301 close(fds[0]); 302 close(fds[1]); 303 304 char level[10]; 305 snprintf(level, sizeof(level), "-%d", gzip_level); 306 execlp("gzip", "gzip", level, NULL); 307 fprintf(stderr, "exec(gzip): %s\n", strerror(errno)); 308 _exit(-1); 309 } 310 311 close(fd); 312 close(fds[0]); 313 fd = fds[1]; 314 } 315 316 dup2(fd, fileno(redirect)); 317 close(fd); 318 return gzip_pid; 319 } 320 321 /* dump Dalvik stack traces, return the trace file location (NULL if none) */ 322 const char *dump_vm_traces() { 323 char traces_path[PROPERTY_VALUE_MAX] = ""; 324 property_get("dalvik.vm.stack-trace-file", traces_path, ""); 325 if (!traces_path[0]) return NULL; 326 327 /* move the old traces.txt (if any) out of the way temporarily */ 328 char anr_traces_path[PATH_MAX]; 329 strlcpy(anr_traces_path, traces_path, sizeof(anr_traces_path)); 330 strlcat(anr_traces_path, ".anr", sizeof(anr_traces_path)); 331 if (rename(traces_path, anr_traces_path) && errno != ENOENT) { 332 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, anr_traces_path, strerror(errno)); 333 return NULL; // Can't rename old traces.txt -- no permission? -- leave it alone instead 334 } 335 336 /* make the directory if necessary */ 337 char anr_traces_dir[PATH_MAX]; 338 strlcpy(anr_traces_dir, traces_path, sizeof(anr_traces_dir)); 339 char *slash = strrchr(anr_traces_dir, '/'); 340 if (slash != NULL) { 341 *slash = '\0'; 342 if (!mkdir(anr_traces_dir, 0775)) { 343 chown(anr_traces_dir, AID_SYSTEM, AID_SYSTEM); 344 } else if (errno != EEXIST) { 345 fprintf(stderr, "mkdir(%s): %s\n", anr_traces_dir, strerror(errno)); 346 return NULL; 347 } 348 } 349 350 /* create a new, empty traces.txt file to receive stack dumps */ 351 int fd = open(traces_path, O_CREAT | O_WRONLY | O_TRUNC, 0666); /* -rw-rw-rw- */ 352 if (fd < 0) { 353 fprintf(stderr, "%s: %s\n", traces_path, strerror(errno)); 354 return NULL; 355 } 356 close(fd); 357 358 /* walk /proc and kill -QUIT all Dalvik processes */ 359 DIR *proc = opendir("/proc"); 360 if (proc == NULL) { 361 fprintf(stderr, "/proc: %s\n", strerror(errno)); 362 return NULL; 363 } 364 365 /* use inotify to find when processes are done dumping */ 366 int ifd = inotify_init(); 367 if (ifd < 0) { 368 fprintf(stderr, "inotify_init: %s\n", strerror(errno)); 369 return NULL; 370 } 371 372 int wfd = inotify_add_watch(ifd, traces_path, IN_CLOSE_WRITE); 373 if (wfd < 0) { 374 fprintf(stderr, "inotify_add_watch(%s): %s\n", traces_path, strerror(errno)); 375 return NULL; 376 } 377 378 struct dirent *d; 379 int dalvik_found = 0; 380 while ((d = readdir(proc))) { 381 int pid = atoi(d->d_name); 382 if (pid <= 0) continue; 383 384 /* identify Dalvik: /proc/(pid)/exe = /system/bin/app_process */ 385 char path[PATH_MAX], data[PATH_MAX]; 386 snprintf(path, sizeof(path), "/proc/%d/exe", pid); 387 size_t len = readlink(path, data, sizeof(data) - 1); 388 if (len <= 0 || memcmp(data, "/system/bin/app_process", 23)) continue; 389 390 /* skip zygote -- it won't dump its stack anyway */ 391 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid); 392 int fd = open(path, O_RDONLY); 393 len = read(fd, data, sizeof(data) - 1); 394 close(fd); 395 if (len <= 0 || !memcmp(data, "zygote", 6)) continue; 396 397 ++dalvik_found; 398 if (kill(pid, SIGQUIT)) { 399 fprintf(stderr, "kill(%d, SIGQUIT): %s\n", pid, strerror(errno)); 400 continue; 401 } 402 403 /* wait for the writable-close notification from inotify */ 404 struct pollfd pfd = { ifd, POLLIN, 0 }; 405 int ret = poll(&pfd, 1, 200); /* 200 msec timeout */ 406 if (ret < 0) { 407 fprintf(stderr, "poll: %s\n", strerror(errno)); 408 } else if (ret == 0) { 409 fprintf(stderr, "warning: timed out dumping pid %d\n", pid); 410 } else { 411 struct inotify_event ie; 412 read(ifd, &ie, sizeof(ie)); 413 } 414 } 415 416 close(ifd); 417 if (dalvik_found == 0) { 418 fprintf(stderr, "Warning: no Dalvik processes found to dump stacks\n"); 419 } 420 421 static char dump_traces_path[PATH_MAX]; 422 strlcpy(dump_traces_path, traces_path, sizeof(dump_traces_path)); 423 strlcat(dump_traces_path, ".bugreport", sizeof(dump_traces_path)); 424 if (rename(traces_path, dump_traces_path)) { 425 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, dump_traces_path, strerror(errno)); 426 return NULL; 427 } 428 429 /* replace the saved [ANR] traces.txt file */ 430 rename(anr_traces_path, traces_path); 431 return dump_traces_path; 432 } 433 434 void play_sound(const char* path) { 435 run_command(NULL, 5, "/system/bin/stagefright", "-o", "-a", path, NULL); 436 } 437
