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1. PackageMS相关框架类
2.1 PackageMS启动过程
# SystemServer.java
private void startBootstrapServices() {
...
mSystemServiceManager.startBootPhase(SystemService.PHASE_WAIT_FOR_DEFAULT_DISPLAY);
...
mPackageManagerService = PackageManagerService.main(mSystemContext, installer,
mFactoryTestMode != FactoryTest.FACTORY_TEST_OFF, mOnlyCore);
mFirstBoot = mPackageManagerService.isFirstBoot();
mPackageManager = mSystemContext.getPackageManager();
...
}
2.2 SystemServer::startOtherServices
private void startOtherServices() {
...
mSystemServiceManager.startBootPhase(SystemService.PHASE_LOCK_SETTINGS_READY);
mSystemServiceManager.startBootPhase(SystemService.PHASE_SYSTEM_SERVICES_READY);
...
mPackageManagerService.systemReady();
...
mSystemServiceManager.startBootPhase(SystemService.PHASE_ACTIVITY_MANAGER_READY);
}
2.3 PackageMS::main
public static PackageManagerService main(Context context, Installer installer,
boolean factoryTest, boolean onlyCore) {
...
PackageManagerService m = new PackageManagerService(context, installer,
...
ServiceManager.addService("package", m);
return m;
}
2.4 PackageMS初始化
public PackageManagerService(Context context, Installer installer,
boolean factoryTest, boolean onlyCore) {
...
// PMS_START
// A.1 创建Settings
mSettings = new Settings(mPackages);
// A.2 system phone log nfc bluetooth shell 添加到Setting
mSettings.addSharedUserLPw("android.uid.system", Process.SYSTEM_UID,
ApplicationInfo.FLAG_SYSTEM, ApplicationInfo.PRIVATE_FLAG_PRIVILEGED);
mSettings.addSharedUserLPw("android.uid.phone", RADIO_UID,
ApplicationInfo.FLAG_SYSTEM, ApplicationInfo.PRIVATE_FLAG_PRIVILEGED);
mSettings.addSharedUserLPw("android.uid.log", LOG_UID,
ApplicationInfo.FLAG_SYSTEM, ApplicationInfo.PRIVATE_FLAG_PRIVILEGED);
mSettings.addSharedUserLPw("android.uid.nfc", NFC_UID,
ApplicationInfo.FLAG_SYSTEM, ApplicationInfo.PRIVATE_FLAG_PRIVILEGED);
mSettings.addSharedUserLPw("android.uid.bluetooth", BLUETOOTH_UID,
ApplicationInfo.FLAG_SYSTEM, ApplicationInfo.PRIVATE_FLAG_PRIVILEGED);
mSettings.addSharedUserLPw("android.uid.shell", SHELL_UID,
ApplicationInfo.FLAG_SYSTEM, ApplicationInfo.PRIVATE_FLAG_PRIVILEGED);
...
mPackageDexOptimizer = new PackageDexOptimizer(installer, mInstallLock, context,
"*dexopt*");
...
// A.3 初始化SystemConfig
SystemConfig systemConfig = SystemConfig.getInstance();
mGlobalGids = systemConfig.getGlobalGids();
mSystemPermissions = systemConfig.getSystemPermissions();
mAvailableFeatures = systemConfig.getAvailableFeatures();
synchronized (mInstallLock) {
synchronized (mPackages) {
mHandlerThread = new ServiceThread(TAG,
Process.THREAD_PRIORITY_BACKGROUND, true /*allowIo*/);
mHandlerThread.start();
// A.4 创建PackageHandler
mHandler = new PackageHandler(mHandlerThread.getLooper());
Watchdog.getInstance().addThread(mHandler, WATCHDOG_TIMEOUT);
...
ArrayMap<String, String> libConfig = systemConfig.getSharedLibraries();
for (int i=0; i<libConfig.size(); i++) {
mSharedLibraries.put(libConfig.keyAt(i),
new SharedLibraryEntry(libConfig.valueAt(i), null));
}
// PMS_SYSTEM_SCAN_START
...
final String bootClassPath = System.getenv("BOOTCLASSPATH");
final String systemServerClassPath = System.getenv("SYSTEMSERVERCLASSPATH");
...
// B.1 对满足调价的Jar Apk执行dex优化
mInstaller.dexopt(lib, Process.SYSTEM_UID, dexCodeInstructionSet, dexoptNeeded, DEXOPT_PUBLIC /*dexFlags*/,
getCompilerFilterForReason(REASON_SHARED_APK), StorageManager.UUID_PRIVATE_INTERNAL, SKIP_SHARED_LIBRARY_CHECK);
...
// B.2 扫描system/app system/priv-app
// Collect ordinary system packages.
final File systemAppDir = new File(Environment.getRootDirectory(), "app");
scanDirTracedLI(systemAppDir, mDefParseFlags
| PackageParser.PARSE_IS_SYSTEM
| PackageParser.PARSE_IS_SYSTEM_DIR, scanFlags, 0);
...
// Collect all OEM packages.
final File oemAppDir = new File(Environment.getOemDirectory(), "app");
scanDirTracedLI(oemAppDir, mDefParseFlags
| PackageParser.PARSE_IS_SYSTEM
| PackageParser.PARSE_IS_SYSTEM_DIR, scanFlags, 0);
...
//look for any incomplete package installations
ArrayList<PackageSetting> deletePkgsList = mSettings.getListOfIncompleteInstallPackagesLPr();
for (int i = 0; i < deletePkgsList.size(); i++) {
// Actual deletion of code and data will be handled by later
// reconciliation step
final String packageName = deletePkgsList.get(i).name;
logCriticalInfo(Log.WARN, "Cleaning up incompletely installed app: " + packageName);
synchronized (mPackages) {
mSettings.removePackageLPw(packageName);
}
}
//delete tmp files
deleteTempPackageFiles();
// Remove any shared userIDs that have no associated packages
mSettings.pruneSharedUsersLPw();
// PMS_DATA_SCAN_START
//C.1 处理非系统App //data/app 、 自定义app路径
if (!mOnlyCore) {
scanDirTracedLI(mAppInstallDir, 0, scanFlags | SCAN_REQUIRE_KNOWN, 0);
...
/**
* Remove disable package settings for any updated system
* apps that were removed via an OTA. If they're not a
* previously-updated app, remove them completely.
* Otherwise, just revoke their system-level permissions.
*/
for (String deletedAppName : possiblyDeletedUpdatedSystemApps) {
PackageParser.Package deletedPkg = mPackages.get(deletedAppName);
mSettings.removeDisabledSystemPackageLPw(deletedAppName);
String msg = "Updated system app + " + deletedAppName
+ " no longer present; removing system privileges for "
+ deletedAppName;
deletedPkg.applicationInfo.flags &= ~ApplicationInfo.FLAG_SYSTEM;
/// M: [Operator] Revoke operator permissions for the original operator package
/// under operator folder was gone due to OTA
deletedPkg.applicationInfo.flagsEx &= ~ApplicationInfo.FLAG_EX_OPERATOR;
PackageSetting deletedPs = mSettings.mPackages.get(deletedAppName);
deletedPs.pkgFlags &= ~ApplicationInfo.FLAG_SYSTEM;
/// M: [Operator] Revoke vendor permissions
deletedPs.pkgFlagsEx &= ~ApplicationInfo.FLAG_EX_OPERATOR;
}
}
/**
* Make sure all system apps that we expected to appear on
* the userdata partition actually showed up. If they never
* appeared, crawl back and revive the system version.
*/
for (int i = 0; i < mExpectingBetter.size(); i++) {
final String packageName = mExpectingBetter.keyAt(i);
if (!mPackages.containsKey(packageName)) {
final File scanFile = mExpectingBetter.valueAt(i);
...
scanPackageTracedLI(scanFile, reparseFlags, scanFlags, 0, null);
}
}
}
...
// PMS_SCAN_END
// D.1 回写package.xml
// can downgrade to reader
mSettings.writeLPr();
...
// PMS_READY
// E1 创建PackageInstallerService
mInstallerService = new PackageInstallerService(context, this);
...
} // synchronized (mPackages)
} // synchronized (mInstallLock)
}
2.5 PackageMS::scanDirLi
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