otapreopt.cpp revision 9fb85b0667235ebfdea00ea345febc8f6eb203d2
1/* 2 ** Copyright 2016, 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 <algorithm> 18#include <inttypes.h> 19#include <random> 20#include <selinux/android.h> 21#include <selinux/avc.h> 22#include <stdlib.h> 23#include <string.h> 24#include <sys/capability.h> 25#include <sys/prctl.h> 26#include <sys/stat.h> 27#include <sys/wait.h> 28 29#include <android-base/logging.h> 30#include <android-base/macros.h> 31#include <android-base/stringprintf.h> 32#include <cutils/fs.h> 33#include <cutils/log.h> 34#include <cutils/properties.h> 35#include <private/android_filesystem_config.h> 36 37#include <commands.h> 38#include <globals.h> 39#include <installd_deps.h> // Need to fill in requirements of commands. 40#include <string_helpers.h> 41#include <system_properties.h> 42#include <utils.h> 43 44#ifndef LOG_TAG 45#define LOG_TAG "otapreopt" 46#endif 47 48#define BUFFER_MAX 1024 /* input buffer for commands */ 49#define TOKEN_MAX 16 /* max number of arguments in buffer */ 50#define REPLY_MAX 256 /* largest reply allowed */ 51 52using android::base::StringPrintf; 53 54namespace android { 55namespace installd { 56 57static constexpr const char* kBootClassPathPropertyName = "env.BOOTCLASSPATH"; 58static constexpr const char* kAndroidRootPathPropertyName = "env.ANDROID_ROOT"; 59static constexpr const char* kOTARootDirectory = "/system-b"; 60static constexpr size_t kISAIndex = 3; 61 62template<typename T> 63static constexpr T RoundDown(T x, typename std::decay<T>::type n) { 64 return DCHECK_CONSTEXPR(IsPowerOfTwo(n), , T(0))(x & -n); 65} 66 67template<typename T> 68static constexpr T RoundUp(T x, typename std::remove_reference<T>::type n) { 69 return RoundDown(x + n - 1, n); 70} 71 72class OTAPreoptService { 73 public: 74 static constexpr const char* kOTADataDirectory = "/data/ota"; 75 76 // Main driver. Performs the following steps. 77 // 78 // 1) Parse options (read system properties etc from B partition). 79 // 80 // 2) Read in package data. 81 // 82 // 3) Prepare environment variables. 83 // 84 // 4) Prepare(compile) boot image, if necessary. 85 // 86 // 5) Run update. 87 int Main(int argc, char** argv) { 88 if (!ReadSystemProperties()) { 89 LOG(ERROR)<< "Failed reading system properties."; 90 return 1; 91 } 92 93 if (!ReadEnvironment()) { 94 LOG(ERROR) << "Failed reading environment properties."; 95 return 2; 96 } 97 98 if (!ReadPackage(argc, argv)) { 99 LOG(ERROR) << "Failed reading command line file."; 100 return 3; 101 } 102 103 PrepareEnvironment(); 104 105 if (!PrepareBootImage()) { 106 LOG(ERROR) << "Failed preparing boot image."; 107 return 4; 108 } 109 110 int dexopt_retcode = RunPreopt(); 111 112 return dexopt_retcode; 113 } 114 115 int GetProperty(const char* key, char* value, const char* default_value) { 116 const std::string* prop_value = system_properties_.GetProperty(key); 117 if (prop_value == nullptr) { 118 if (default_value == nullptr) { 119 return 0; 120 } 121 // Copy in the default value. 122 strncpy(value, default_value, kPropertyValueMax - 1); 123 value[kPropertyValueMax - 1] = 0; 124 return strlen(default_value);// TODO: Need to truncate? 125 } 126 size_t size = std::min(kPropertyValueMax - 1, prop_value->length()); 127 strncpy(value, prop_value->data(), size); 128 value[size] = 0; 129 return static_cast<int>(size); 130 } 131 132private: 133 bool ReadSystemProperties() { 134 // TODO(agampe): What to do about the things in default.prop? It's only heap sizes, so it's easy 135 // to emulate for now, but has issues (e.g., vendors modifying the boot classpath 136 // may require larger values here - revisit). That's why this goes first, so that 137 // if those dummy values are overridden in build.prop, that's what we'll get. 138 // 139 // Note: It seems we'll get access to the B root partition, so we should read the default.prop 140 // file. 141 // if (!system_properties_.Load("/default.prop")) { 142 // return false; 143 // } 144 system_properties_.SetProperty("dalvik.vm.image-dex2oat-Xms", "64m"); 145 system_properties_.SetProperty("dalvik.vm.image-dex2oat-Xmx", "64m"); 146 system_properties_.SetProperty("dalvik.vm.dex2oat-Xms", "64m"); 147 system_properties_.SetProperty("dalvik.vm.dex2oat-Xmx", "512m"); 148 149 // TODO(agampe): Do this properly/test. 150 return system_properties_.Load("/system/build.prop"); 151 } 152 153 bool ReadEnvironment() { 154 // Read important environment variables. For simplicity, store them as 155 // system properties. 156 // TODO(agampe): We'll have to parse init.environ.rc for BOOTCLASSPATH. 157 // For now, just the A version. 158 const char* boot_classpath = getenv("BOOTCLASSPATH"); 159 if (boot_classpath == nullptr) { 160 return false; 161 } 162 system_properties_.SetProperty(kBootClassPathPropertyName, boot_classpath); 163 164 const char* root_path = getenv("ANDROID_ROOT"); 165 if (root_path == nullptr) { 166 return false; 167 } 168 system_properties_.SetProperty(kAndroidRootPathPropertyName, root_path); 169 170 return true; 171 } 172 173 bool ReadPackage(int argc ATTRIBUTE_UNUSED, char** argv) { 174 size_t index = 0; 175 while (index < ARRAY_SIZE(package_parameters_) && 176 argv[index + 1] != nullptr) { 177 package_parameters_[index] = argv[index + 1]; 178 index++; 179 } 180 if (index != ARRAY_SIZE(package_parameters_)) { 181 LOG(ERROR) << "Wrong number of parameters"; 182 return false; 183 } 184 185 return true; 186 } 187 188 void PrepareEnvironment() { 189 CHECK(system_properties_.GetProperty(kBootClassPathPropertyName) != nullptr); 190 const std::string& boot_cp = 191 *system_properties_.GetProperty(kBootClassPathPropertyName); 192 environ_.push_back(StringPrintf("BOOTCLASSPATH=%s", boot_cp.c_str())); 193 environ_.push_back(StringPrintf("ANDROID_DATA=%s", kOTADataDirectory)); 194 CHECK(system_properties_.GetProperty(kAndroidRootPathPropertyName) != nullptr); 195 const std::string& android_root = 196 *system_properties_.GetProperty(kAndroidRootPathPropertyName); 197 environ_.push_back(StringPrintf("ANDROID_ROOT=%s", android_root.c_str())); 198 199 for (const std::string& e : environ_) { 200 putenv(const_cast<char*>(e.c_str())); 201 } 202 } 203 204 // Ensure that we have the right boot image. The first time any app is 205 // compiled, we'll try to generate it. 206 bool PrepareBootImage() { 207 if (package_parameters_[kISAIndex] == nullptr) { 208 LOG(ERROR) << "Instruction set missing."; 209 return false; 210 } 211 const char* isa = package_parameters_[kISAIndex]; 212 213 // Check whether the file exists where expected. 214 std::string dalvik_cache = std::string(kOTADataDirectory) + "/" + DALVIK_CACHE; 215 std::string isa_path = dalvik_cache + "/" + isa; 216 std::string art_path = isa_path + "/system@framework@boot.art"; 217 std::string oat_path = isa_path + "/system@framework@boot.oat"; 218 if (access(art_path.c_str(), F_OK) == 0 && 219 access(oat_path.c_str(), F_OK) == 0) { 220 // Files exist, assume everything is alright. 221 return true; 222 } 223 224 // Create the directories, if necessary. 225 if (access(dalvik_cache.c_str(), F_OK) != 0) { 226 if (mkdir(dalvik_cache.c_str(), 0711) != 0) { 227 PLOG(ERROR) << "Could not create dalvik-cache dir"; 228 return false; 229 } 230 } 231 if (access(isa_path.c_str(), F_OK) != 0) { 232 if (mkdir(isa_path.c_str(), 0711) != 0) { 233 PLOG(ERROR) << "Could not create dalvik-cache isa dir"; 234 return false; 235 } 236 } 237 238 // Prepare to create. 239 // TODO: Delete files, just for a blank slate. 240 const std::string& boot_cp = *system_properties_.GetProperty(kBootClassPathPropertyName); 241 242 std::string preopted_boot_art_path = StringPrintf("/system/framework/%s/boot.art", isa); 243 if (access(preopted_boot_art_path.c_str(), F_OK) == 0) { 244 return PatchoatBootImage(art_path, isa); 245 } else { 246 // No preopted boot image. Try to compile. 247 return Dex2oatBootImage(boot_cp, art_path, oat_path, isa); 248 } 249 } 250 251 bool PatchoatBootImage(const std::string& art_path, const char* isa) { 252 // This needs to be kept in sync with ART, see art/runtime/gc/space/image_space.cc. 253 254 std::vector<std::string> cmd; 255 cmd.push_back("/system/bin/patchoat"); 256 257 cmd.push_back("--input-image-location=/system/framework/boot.art"); 258 cmd.push_back(StringPrintf("--output-image-file=%s", art_path.c_str())); 259 260 cmd.push_back(StringPrintf("--instruction-set=%s", isa)); 261 262 int32_t base_offset = ChooseRelocationOffsetDelta(ART_BASE_ADDRESS_MIN_DELTA, 263 ART_BASE_ADDRESS_MAX_DELTA); 264 cmd.push_back(StringPrintf("--base-offset-delta=%d", base_offset)); 265 266 std::string error_msg; 267 bool result = Exec(cmd, &error_msg); 268 if (!result) { 269 LOG(ERROR) << "Could not generate boot image: " << error_msg; 270 } 271 return result; 272 } 273 274 bool Dex2oatBootImage(const std::string& boot_cp, 275 const std::string& art_path, 276 const std::string& oat_path, 277 const char* isa) { 278 // This needs to be kept in sync with ART, see art/runtime/gc/space/image_space.cc. 279 std::vector<std::string> cmd; 280 cmd.push_back("/system/bin/dex2oat"); 281 cmd.push_back(StringPrintf("--image=%s", art_path.c_str())); 282 for (const std::string& boot_part : Split(boot_cp, ':')) { 283 cmd.push_back(StringPrintf("--dex-file=%s", boot_part.c_str())); 284 } 285 cmd.push_back(StringPrintf("--oat-file=%s", oat_path.c_str())); 286 287 int32_t base_offset = ChooseRelocationOffsetDelta(ART_BASE_ADDRESS_MIN_DELTA, 288 ART_BASE_ADDRESS_MAX_DELTA); 289 cmd.push_back(StringPrintf("--base=0x%x", ART_BASE_ADDRESS + base_offset)); 290 291 cmd.push_back(StringPrintf("--instruction-set=%s", isa)); 292 293 // These things are pushed by AndroidRuntime, see frameworks/base/core/jni/AndroidRuntime.cpp. 294 AddCompilerOptionFromSystemProperty("dalvik.vm.image-dex2oat-Xms", 295 "-Xms", 296 true, 297 cmd); 298 AddCompilerOptionFromSystemProperty("dalvik.vm.image-dex2oat-Xmx", 299 "-Xmx", 300 true, 301 cmd); 302 AddCompilerOptionFromSystemProperty("dalvik.vm.image-dex2oat-filter", 303 "--compiler-filter=", 304 false, 305 cmd); 306 cmd.push_back("--image-classes=/system/etc/preloaded-classes"); 307 // TODO: Compiled-classes. 308 const std::string* extra_opts = 309 system_properties_.GetProperty("dalvik.vm.image-dex2oat-flags"); 310 if (extra_opts != nullptr) { 311 std::vector<std::string> extra_vals = Split(*extra_opts, ' '); 312 cmd.insert(cmd.end(), extra_vals.begin(), extra_vals.end()); 313 } 314 // TODO: Should we lower this? It's usually set close to max, because 315 // normally there's not much else going on at boot. 316 AddCompilerOptionFromSystemProperty("dalvik.vm.image-dex2oat-threads", 317 "-j", 318 false, 319 cmd); 320 AddCompilerOptionFromSystemProperty( 321 StringPrintf("dalvik.vm.isa.%s.variant", isa).c_str(), 322 "--instruction-set-variant=", 323 false, 324 cmd); 325 AddCompilerOptionFromSystemProperty( 326 StringPrintf("dalvik.vm.isa.%s.features", isa).c_str(), 327 "--instruction-set-features=", 328 false, 329 cmd); 330 331 std::string error_msg; 332 bool result = Exec(cmd, &error_msg); 333 if (!result) { 334 LOG(ERROR) << "Could not generate boot image: " << error_msg; 335 } 336 return result; 337 } 338 339 static const char* ParseNull(const char* arg) { 340 return (strcmp(arg, "!") == 0) ? nullptr : arg; 341 } 342 343 int RunPreopt() { 344 /* apk_path, uid, pkgname, instruction_set, dexopt_needed, oat_dir, dexopt_flags, 345 volume_uuid, use_profiles */ 346 int ret = dexopt(package_parameters_[0], 347 atoi(package_parameters_[1]), 348 package_parameters_[2], 349 package_parameters_[3], 350 atoi(package_parameters_[4]), 351 package_parameters_[5], 352 atoi(package_parameters_[6]), 353 ParseNull(package_parameters_[7]), 354 (atoi(package_parameters_[8]) == 0 ? false : true)); 355 return ret; 356 } 357 358 //////////////////////////////////// 359 // Helpers, mostly taken from ART // 360 //////////////////////////////////// 361 362 // Wrapper on fork/execv to run a command in a subprocess. 363 bool Exec(const std::vector<std::string>& arg_vector, std::string* error_msg) { 364 const std::string command_line(Join(arg_vector, ' ')); 365 366 CHECK_GE(arg_vector.size(), 1U) << command_line; 367 368 // Convert the args to char pointers. 369 const char* program = arg_vector[0].c_str(); 370 std::vector<char*> args; 371 for (size_t i = 0; i < arg_vector.size(); ++i) { 372 const std::string& arg = arg_vector[i]; 373 char* arg_str = const_cast<char*>(arg.c_str()); 374 CHECK(arg_str != nullptr) << i; 375 args.push_back(arg_str); 376 } 377 args.push_back(nullptr); 378 379 // Fork and exec. 380 pid_t pid = fork(); 381 if (pid == 0) { 382 // No allocation allowed between fork and exec. 383 384 // Change process groups, so we don't get reaped by ProcessManager. 385 setpgid(0, 0); 386 387 execv(program, &args[0]); 388 389 PLOG(ERROR) << "Failed to execv(" << command_line << ")"; 390 // _exit to avoid atexit handlers in child. 391 _exit(1); 392 } else { 393 if (pid == -1) { 394 *error_msg = StringPrintf("Failed to execv(%s) because fork failed: %s", 395 command_line.c_str(), strerror(errno)); 396 return false; 397 } 398 399 // wait for subprocess to finish 400 int status; 401 pid_t got_pid = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0)); 402 if (got_pid != pid) { 403 *error_msg = StringPrintf("Failed after fork for execv(%s) because waitpid failed: " 404 "wanted %d, got %d: %s", 405 command_line.c_str(), pid, got_pid, strerror(errno)); 406 return false; 407 } 408 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { 409 *error_msg = StringPrintf("Failed execv(%s) because non-0 exit status", 410 command_line.c_str()); 411 return false; 412 } 413 } 414 return true; 415 } 416 417 // Choose a random relocation offset. Taken from art/runtime/gc/image_space.cc. 418 static int32_t ChooseRelocationOffsetDelta(int32_t min_delta, int32_t max_delta) { 419 constexpr size_t kPageSize = PAGE_SIZE; 420 CHECK_EQ(min_delta % kPageSize, 0u); 421 CHECK_EQ(max_delta % kPageSize, 0u); 422 CHECK_LT(min_delta, max_delta); 423 424 std::default_random_engine generator; 425 generator.seed(GetSeed()); 426 std::uniform_int_distribution<int32_t> distribution(min_delta, max_delta); 427 int32_t r = distribution(generator); 428 if (r % 2 == 0) { 429 r = RoundUp(r, kPageSize); 430 } else { 431 r = RoundDown(r, kPageSize); 432 } 433 CHECK_LE(min_delta, r); 434 CHECK_GE(max_delta, r); 435 CHECK_EQ(r % kPageSize, 0u); 436 return r; 437 } 438 439 static uint64_t GetSeed() { 440#ifdef __BIONIC__ 441 // Bionic exposes arc4random, use it. 442 uint64_t random_data; 443 arc4random_buf(&random_data, sizeof(random_data)); 444 return random_data; 445#else 446#error "This is only supposed to run with bionic. Otherwise, implement..." 447#endif 448 } 449 450 void AddCompilerOptionFromSystemProperty(const char* system_property, 451 const char* prefix, 452 bool runtime, 453 std::vector<std::string>& out) { 454 const std::string* value = 455 system_properties_.GetProperty(system_property); 456 if (value != nullptr) { 457 if (runtime) { 458 out.push_back("--runtime-arg"); 459 } 460 if (prefix != nullptr) { 461 out.push_back(StringPrintf("%s%s", prefix, value->c_str())); 462 } else { 463 out.push_back(*value); 464 } 465 } 466 } 467 468 // Stores the system properties read out of the B partition. We need to use these properties 469 // to compile, instead of the A properties we could get from init/get_property. 470 SystemProperties system_properties_; 471 472 const char* package_parameters_[9]; 473 474 // Store environment values we need to set. 475 std::vector<std::string> environ_; 476}; 477 478OTAPreoptService gOps; 479 480//////////////////////// 481// Plug-in functions. // 482//////////////////////// 483 484int get_property(const char *key, char *value, const char *default_value) { 485 // TODO: Replace with system-properties map. 486 return gOps.GetProperty(key, value, default_value); 487} 488 489// Compute the output path of 490bool calculate_oat_file_path(char path[PKG_PATH_MAX], const char *oat_dir, 491 const char *apk_path, 492 const char *instruction_set) { 493 // TODO: Insert B directory. 494 char *file_name_start; 495 char *file_name_end; 496 497 file_name_start = strrchr(apk_path, '/'); 498 if (file_name_start == nullptr) { 499 ALOGE("apk_path '%s' has no '/'s in it\n", apk_path); 500 return false; 501 } 502 file_name_end = strrchr(file_name_start, '.'); 503 if (file_name_end == nullptr) { 504 ALOGE("apk_path '%s' has no extension\n", apk_path); 505 return false; 506 } 507 508 // Calculate file_name 509 file_name_start++; // Move past '/', is valid as file_name_end is valid. 510 size_t file_name_len = file_name_end - file_name_start; 511 std::string file_name(file_name_start, file_name_len); 512 513 // <apk_parent_dir>/oat/<isa>/<file_name>.odex.b 514 snprintf(path, PKG_PATH_MAX, "%s/%s/%s.odex.b", oat_dir, instruction_set, 515 file_name.c_str()); 516 return true; 517} 518 519/* 520 * Computes the odex file for the given apk_path and instruction_set. 521 * /system/framework/whatever.jar -> /system/framework/oat/<isa>/whatever.odex 522 * 523 * Returns false if it failed to determine the odex file path. 524 */ 525bool calculate_odex_file_path(char path[PKG_PATH_MAX], const char *apk_path, 526 const char *instruction_set) { 527 if (StringPrintf("%soat/%s/odex.b", apk_path, instruction_set).length() + 1 > PKG_PATH_MAX) { 528 ALOGE("apk_path '%s' may be too long to form odex file path.\n", apk_path); 529 return false; 530 } 531 532 const char *path_end = strrchr(apk_path, '/'); 533 if (path_end == nullptr) { 534 ALOGE("apk_path '%s' has no '/'s in it?!\n", apk_path); 535 return false; 536 } 537 std::string path_component(apk_path, path_end - apk_path); 538 539 const char *name_begin = path_end + 1; 540 const char *extension_start = strrchr(name_begin, '.'); 541 if (extension_start == nullptr) { 542 ALOGE("apk_path '%s' has no extension.\n", apk_path); 543 return false; 544 } 545 std::string name_component(name_begin, extension_start - name_begin); 546 547 std::string new_path = StringPrintf("%s/oat/%s/%s.odex.b", 548 path_component.c_str(), 549 instruction_set, 550 name_component.c_str()); 551 CHECK_LT(new_path.length(), PKG_PATH_MAX); 552 strcpy(path, new_path.c_str()); 553 return true; 554} 555 556bool create_cache_path(char path[PKG_PATH_MAX], 557 const char *src, 558 const char *instruction_set) { 559 size_t srclen = strlen(src); 560 561 /* demand that we are an absolute path */ 562 if ((src == 0) || (src[0] != '/') || strstr(src,"..")) { 563 return false; 564 } 565 566 if (srclen > PKG_PATH_MAX) { // XXX: PKG_NAME_MAX? 567 return false; 568 } 569 570 std::string from_src = std::string(src + 1); 571 std::replace(from_src.begin(), from_src.end(), '/', '@'); 572 573 std::string assembled_path = StringPrintf("%s/%s/%s/%s%s", 574 OTAPreoptService::kOTADataDirectory, 575 DALVIK_CACHE, 576 instruction_set, 577 from_src.c_str(), 578 DALVIK_CACHE_POSTFIX2); 579 580 if (assembled_path.length() + 1 > PKG_PATH_MAX) { 581 return false; 582 } 583 strcpy(path, assembled_path.c_str()); 584 585 return true; 586} 587 588bool initialize_globals() { 589 const char* data_path = getenv("ANDROID_DATA"); 590 if (data_path == nullptr) { 591 ALOGE("Could not find ANDROID_DATA"); 592 return false; 593 } 594 return init_globals_from_data_and_root(data_path, kOTARootDirectory); 595} 596 597static bool initialize_directories() { 598 // This is different from the normal installd. We only do the base 599 // directory, the rest will be created on demand when each app is compiled. 600 mode_t old_umask = umask(0); 601 LOG(INFO) << "Old umask: " << old_umask; 602 if (access(OTAPreoptService::kOTADataDirectory, R_OK) < 0) { 603 ALOGE("Could not access %s\n", OTAPreoptService::kOTADataDirectory); 604 return false; 605 } 606 return true; 607} 608 609static int log_callback(int type, const char *fmt, ...) { 610 va_list ap; 611 int priority; 612 613 switch (type) { 614 case SELINUX_WARNING: 615 priority = ANDROID_LOG_WARN; 616 break; 617 case SELINUX_INFO: 618 priority = ANDROID_LOG_INFO; 619 break; 620 default: 621 priority = ANDROID_LOG_ERROR; 622 break; 623 } 624 va_start(ap, fmt); 625 LOG_PRI_VA(priority, "SELinux", fmt, ap); 626 va_end(ap); 627 return 0; 628} 629 630static int otapreopt_main(const int argc, char *argv[]) { 631 int selinux_enabled = (is_selinux_enabled() > 0); 632 633 setenv("ANDROID_LOG_TAGS", "*:v", 1); 634 android::base::InitLogging(argv); 635 636 ALOGI("otapreopt firing up\n"); 637 638 if (argc < 2) { 639 ALOGE("Expecting parameters"); 640 exit(1); 641 } 642 643 union selinux_callback cb; 644 cb.func_log = log_callback; 645 selinux_set_callback(SELINUX_CB_LOG, cb); 646 647 if (!initialize_globals()) { 648 ALOGE("Could not initialize globals; exiting.\n"); 649 exit(1); 650 } 651 652 if (!initialize_directories()) { 653 ALOGE("Could not create directories; exiting.\n"); 654 exit(1); 655 } 656 657 if (selinux_enabled && selinux_status_open(true) < 0) { 658 ALOGE("Could not open selinux status; exiting.\n"); 659 exit(1); 660 } 661 662 int ret = android::installd::gOps.Main(argc, argv); 663 664 return ret; 665} 666 667} // namespace installd 668} // namespace android 669 670int main(const int argc, char *argv[]) { 671 return android::installd::otapreopt_main(argc, argv); 672} 673