utils.cpp revision c7f1fe26804ab986b90f3ba007db94f71e94932a
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/properties.h> 36#include <cutils/sockets.h> 37#include <private/android_filesystem_config.h> 38 39#include "dumpstate.h" 40 41void for_each_pid(void (*func)(int, const char *), const char *header) { 42 DIR *d; 43 struct dirent *de; 44 45 if (!(d = opendir("/proc"))) { 46 printf("Failed to open /proc (%s)\n", strerror(errno)); 47 return; 48 } 49 50 printf("\n------ %s ------\n", header); 51 while ((de = readdir(d))) { 52 int pid; 53 int fd; 54 char cmdpath[255]; 55 char cmdline[255]; 56 57 if (!(pid = atoi(de->d_name))) { 58 continue; 59 } 60 61 sprintf(cmdpath,"/proc/%d/cmdline", pid); 62 memset(cmdline, 0, sizeof(cmdline)); 63 if ((fd = open(cmdpath, O_RDONLY)) < 0) { 64 strcpy(cmdline, "N/A"); 65 } else { 66 read(fd, cmdline, sizeof(cmdline)); 67 close(fd); 68 } 69 func(pid, cmdline); 70 } 71 72 closedir(d); 73} 74 75void show_wchan(int pid, const char *name) { 76 char path[255]; 77 char buffer[255]; 78 int fd; 79 80 memset(buffer, 0, sizeof(buffer)); 81 82 sprintf(path, "/proc/%d/wchan", pid); 83 if ((fd = open(path, O_RDONLY)) < 0) { 84 printf("Failed to open '%s' (%s)\n", path, strerror(errno)); 85 return; 86 } 87 88 if (read(fd, buffer, sizeof(buffer)) < 0) { 89 printf("Failed to read '%s' (%s)\n", path, strerror(errno)); 90 goto out_close; 91 } 92 93 printf("%-7d %-32s %s\n", pid, name, buffer); 94 95out_close: 96 close(fd); 97 return; 98} 99 100void do_dmesg() { 101 printf("------ KERNEL LOG (dmesg) ------\n"); 102 int size = klogctl(10, NULL, 0); /* Get size of kernel buffer */ 103 if (size <= 0) { 104 printf("Unexpected klogctl return value: %d\n\n", size); 105 return; 106 } 107 char *buf = (char *) malloc(size + 1); 108 if (buf == NULL) { 109 printf("memory allocation failed\n\n"); 110 return; 111 } 112 int retval = klogctl(KLOG_READ_ALL, buf, size); 113 if (retval < 0) { 114 printf("klogctl failure\n\n"); 115 free(buf); 116 return; 117 } 118 buf[retval] = '\0'; 119 printf("%s\n\n", buf); 120 free(buf); 121 return; 122} 123 124void do_showmap(int pid, const char *name) { 125 char title[255]; 126 char arg[255]; 127 128 sprintf(title, "SHOW MAP %d (%s)", pid, name); 129 sprintf(arg, "%d", pid); 130 run_command(title, 10, SU_PATH, "root", "showmap", arg, NULL); 131} 132 133/* prints the contents of a file */ 134int dump_file(const char *title, const char* path) { 135 char buffer[32768]; 136 int fd = open(path, O_RDONLY); 137 if (fd < 0) { 138 int err = errno; 139 if (title) printf("------ %s (%s) ------\n", title, path); 140 printf("*** %s: %s\n", path, strerror(err)); 141 if (title) printf("\n"); 142 return -1; 143 } 144 145 if (title) printf("------ %s (%s", title, path); 146 147 if (title) { 148 struct stat st; 149 if (memcmp(path, "/proc/", 6) && memcmp(path, "/sys/", 5) && !fstat(fd, &st)) { 150 char stamp[80]; 151 time_t mtime = st.st_mtime; 152 strftime(stamp, sizeof(stamp), "%Y-%m-%d %H:%M:%S", localtime(&mtime)); 153 printf(": %s", stamp); 154 } 155 printf(") ------\n"); 156 } 157 158 int newline = 0; 159 for (;;) { 160 int ret = read(fd, buffer, sizeof(buffer)); 161 if (ret > 0) { 162 newline = (buffer[ret - 1] == '\n'); 163 ret = fwrite(buffer, ret, 1, stdout); 164 } 165 if (ret <= 0) break; 166 } 167 168 close(fd); 169 if (!newline) printf("\n"); 170 if (title) printf("\n"); 171 return 0; 172} 173 174/* forks a command and waits for it to finish */ 175int run_command(const char *title, int timeout_seconds, const char *command, ...) { 176 fflush(stdout); 177 clock_t start = clock(); 178 pid_t pid = fork(); 179 180 /* handle error case */ 181 if (pid < 0) { 182 printf("*** fork: %s\n", strerror(errno)); 183 return pid; 184 } 185 186 /* handle child case */ 187 if (pid == 0) { 188 const char *args[1024] = {command}; 189 size_t arg; 190 191 va_list ap; 192 va_start(ap, command); 193 if (title) printf("------ %s (%s", title, command); 194 for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) { 195 args[arg] = va_arg(ap, const char *); 196 if (args[arg] == NULL) break; 197 if (title) printf(" %s", args[arg]); 198 } 199 if (title) printf(") ------\n"); 200 fflush(stdout); 201 202 execvp(command, (char**) args); 203 printf("*** exec(%s): %s\n", command, strerror(errno)); 204 fflush(stdout); 205 _exit(-1); 206 } 207 208 /* handle parent case */ 209 for (;;) { 210 int status; 211 pid_t p = waitpid(pid, &status, WNOHANG); 212 float elapsed = (float) (clock() - start) / CLOCKS_PER_SEC; 213 if (p == pid) { 214 if (WIFSIGNALED(status)) { 215 printf("*** %s: Killed by signal %d\n", command, WTERMSIG(status)); 216 } else if (WIFEXITED(status) && WEXITSTATUS(status) > 0) { 217 printf("*** %s: Exit code %d\n", command, WEXITSTATUS(status)); 218 } 219 if (title) printf("[%s: %.1fs elapsed]\n\n", command, elapsed); 220 return status; 221 } 222 223 if (timeout_seconds && elapsed > timeout_seconds) { 224 printf("*** %s: Timed out after %.1fs (killing pid %d)\n", command, elapsed, pid); 225 kill(pid, SIGTERM); 226 return -1; 227 } 228 229 usleep(100000); // poll every 0.1 sec 230 } 231} 232 233size_t num_props = 0; 234static char* props[2000]; 235 236static void print_prop(const char *key, const char *name, void *user) { 237 (void) user; 238 if (num_props < sizeof(props) / sizeof(props[0])) { 239 char buf[PROPERTY_KEY_MAX + PROPERTY_VALUE_MAX + 10]; 240 snprintf(buf, sizeof(buf), "[%s]: [%s]\n", key, name); 241 props[num_props++] = strdup(buf); 242 } 243} 244 245static int compare_prop(const void *a, const void *b) { 246 return strcmp(*(char * const *) a, *(char * const *) b); 247} 248 249/* prints all the system properties */ 250void print_properties() { 251 size_t i; 252 num_props = 0; 253 property_list(print_prop, NULL); 254 qsort(&props, num_props, sizeof(props[0]), compare_prop); 255 256 printf("------ SYSTEM PROPERTIES ------\n"); 257 for (i = 0; i < num_props; ++i) { 258 fputs(props[i], stdout); 259 free(props[i]); 260 } 261 printf("\n"); 262} 263 264/* redirect output to a service control socket */ 265void redirect_to_socket(FILE *redirect, const char *service) { 266 int s = android_get_control_socket(service); 267 if (s < 0) { 268 fprintf(stderr, "android_get_control_socket(%s): %s\n", service, strerror(errno)); 269 exit(1); 270 } 271 if (listen(s, 4) < 0) { 272 fprintf(stderr, "listen(control socket): %s\n", strerror(errno)); 273 exit(1); 274 } 275 276 struct sockaddr addr; 277 socklen_t alen = sizeof(addr); 278 int fd = accept(s, &addr, &alen); 279 if (fd < 0) { 280 fprintf(stderr, "accept(control socket): %s\n", strerror(errno)); 281 exit(1); 282 } 283 284 fflush(redirect); 285 dup2(fd, fileno(redirect)); 286 close(fd); 287} 288 289/* redirect output to a file, optionally gzipping; returns gzip pid (or -1) */ 290pid_t redirect_to_file(FILE *redirect, char *path, int gzip_level) { 291 char *chp = path; 292 293 /* skip initial slash */ 294 if (chp[0] == '/') 295 chp++; 296 297 /* create leading directories, if necessary */ 298 while (chp && chp[0]) { 299 chp = strchr(chp, '/'); 300 if (chp) { 301 *chp = 0; 302 mkdir(path, 0775); /* drwxrwxr-x */ 303 *chp++ = '/'; 304 } 305 } 306 307 int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); 308 if (fd < 0) { 309 fprintf(stderr, "%s: %s\n", path, strerror(errno)); 310 exit(1); 311 } 312 313 pid_t gzip_pid = -1; 314 if (gzip_level > 0) { 315 int fds[2]; 316 if (pipe(fds)) { 317 fprintf(stderr, "pipe: %s\n", strerror(errno)); 318 exit(1); 319 } 320 321 fflush(redirect); 322 fflush(stdout); 323 324 gzip_pid = fork(); 325 if (gzip_pid < 0) { 326 fprintf(stderr, "fork: %s\n", strerror(errno)); 327 exit(1); 328 } 329 330 if (gzip_pid == 0) { 331 dup2(fds[0], STDIN_FILENO); 332 dup2(fd, STDOUT_FILENO); 333 334 close(fd); 335 close(fds[0]); 336 close(fds[1]); 337 338 char level[10]; 339 snprintf(level, sizeof(level), "-%d", gzip_level); 340 execlp("gzip", "gzip", level, NULL); 341 fprintf(stderr, "exec(gzip): %s\n", strerror(errno)); 342 _exit(-1); 343 } 344 345 close(fd); 346 close(fds[0]); 347 fd = fds[1]; 348 } 349 350 dup2(fd, fileno(redirect)); 351 close(fd); 352 return gzip_pid; 353} 354 355/* dump Dalvik stack traces, return the trace file location (NULL if none) */ 356const char *dump_vm_traces() { 357 char traces_path[PROPERTY_VALUE_MAX] = ""; 358 property_get("dalvik.vm.stack-trace-file", traces_path, ""); 359 if (!traces_path[0]) return NULL; 360 361 /* move the old traces.txt (if any) out of the way temporarily */ 362 char anr_traces_path[PATH_MAX]; 363 strlcpy(anr_traces_path, traces_path, sizeof(anr_traces_path)); 364 strlcat(anr_traces_path, ".anr", sizeof(anr_traces_path)); 365 if (rename(traces_path, anr_traces_path) && errno != ENOENT) { 366 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, anr_traces_path, strerror(errno)); 367 return NULL; // Can't rename old traces.txt -- no permission? -- leave it alone instead 368 } 369 370 /* make the directory if necessary */ 371 char anr_traces_dir[PATH_MAX]; 372 strlcpy(anr_traces_dir, traces_path, sizeof(anr_traces_dir)); 373 char *slash = strrchr(anr_traces_dir, '/'); 374 if (slash != NULL) { 375 *slash = '\0'; 376 if (!mkdir(anr_traces_dir, 0775)) { 377 chown(anr_traces_dir, AID_SYSTEM, AID_SYSTEM); 378 chmod(anr_traces_dir, 0775); 379 } else if (errno != EEXIST) { 380 fprintf(stderr, "mkdir(%s): %s\n", anr_traces_dir, strerror(errno)); 381 return NULL; 382 } 383 } 384 385 /* create a new, empty traces.txt file to receive stack dumps */ 386 int fd = open(traces_path, O_CREAT | O_WRONLY | O_TRUNC, 0666); /* -rw-rw-rw- */ 387 if (fd < 0) { 388 fprintf(stderr, "%s: %s\n", traces_path, strerror(errno)); 389 return NULL; 390 } 391 int chmod_ret = fchmod(fd, 0666); 392 if (chmod_ret < 0) { 393 fprintf(stderr, "fchmod on %s failed: %s\n", traces_path, strerror(errno)); 394 close(fd); 395 return NULL; 396 } 397 close(fd); 398 399 /* walk /proc and kill -QUIT all Dalvik processes */ 400 DIR *proc = opendir("/proc"); 401 if (proc == NULL) { 402 fprintf(stderr, "/proc: %s\n", strerror(errno)); 403 return NULL; 404 } 405 406 /* use inotify to find when processes are done dumping */ 407 int ifd = inotify_init(); 408 if (ifd < 0) { 409 fprintf(stderr, "inotify_init: %s\n", strerror(errno)); 410 return NULL; 411 } 412 413 int wfd = inotify_add_watch(ifd, traces_path, IN_CLOSE_WRITE); 414 if (wfd < 0) { 415 fprintf(stderr, "inotify_add_watch(%s): %s\n", traces_path, strerror(errno)); 416 return NULL; 417 } 418 419 struct dirent *d; 420 int dalvik_found = 0; 421 while ((d = readdir(proc))) { 422 int pid = atoi(d->d_name); 423 if (pid <= 0) continue; 424 425 /* identify Dalvik: /proc/(pid)/exe = /system/bin/app_process */ 426 char path[PATH_MAX], data[PATH_MAX]; 427 snprintf(path, sizeof(path), "/proc/%d/exe", pid); 428 size_t len = readlink(path, data, sizeof(data) - 1); 429 if (len <= 0 || memcmp(data, "/system/bin/app_process", 23)) continue; 430 431 /* skip zygote -- it won't dump its stack anyway */ 432 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid); 433 int fd = open(path, O_RDONLY); 434 len = read(fd, data, sizeof(data) - 1); 435 close(fd); 436 if (len <= 0 || !memcmp(data, "zygote", 6)) continue; 437 438 ++dalvik_found; 439 if (kill(pid, SIGQUIT)) { 440 fprintf(stderr, "kill(%d, SIGQUIT): %s\n", pid, strerror(errno)); 441 continue; 442 } 443 444 /* wait for the writable-close notification from inotify */ 445 struct pollfd pfd = { ifd, POLLIN, 0 }; 446 int ret = poll(&pfd, 1, 200); /* 200 msec timeout */ 447 if (ret < 0) { 448 fprintf(stderr, "poll: %s\n", strerror(errno)); 449 } else if (ret == 0) { 450 fprintf(stderr, "warning: timed out dumping pid %d\n", pid); 451 } else { 452 struct inotify_event ie; 453 read(ifd, &ie, sizeof(ie)); 454 } 455 } 456 457 close(ifd); 458 if (dalvik_found == 0) { 459 fprintf(stderr, "Warning: no Dalvik processes found to dump stacks\n"); 460 } 461 462 static char dump_traces_path[PATH_MAX]; 463 strlcpy(dump_traces_path, traces_path, sizeof(dump_traces_path)); 464 strlcat(dump_traces_path, ".bugreport", sizeof(dump_traces_path)); 465 if (rename(traces_path, dump_traces_path)) { 466 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, dump_traces_path, strerror(errno)); 467 return NULL; 468 } 469 470 /* replace the saved [ANR] traces.txt file */ 471 rename(anr_traces_path, traces_path); 472 return dump_traces_path; 473} 474 475void play_sound(const char* path) { 476 run_command(NULL, 5, "/system/bin/stagefright", "-o", "-a", path, NULL); 477} 478