PackageManagerServiceスキャンインストールapkの詳細
44872 ワード
PMSシリーズ:1、PackageManagerServiceサービスフレームワークの詳細2、PackageManagerService起動分析3、PackageManagerServiceのappデータクラス(Settings)分析4、本論文PackageManagerServiceスキャンインストールapk詳細5、PackageManagerService権限等級管理権限(デフォルトではapk権限付与)
本文は主にAndroidのPMSがどのようにapkをインストールするかを分析して、コードはandroid Nに基づいています
一、取り付け方式
apkのインストールには以下の4つの方式がある:1、apkはPMSの起動に伴ってインストールする(本文)2、adb installインストール3、ODM内蔵ショップサイレントインストール4、apkを携帯電話にコピーし、インタフェースインストールの4つの方式はコードの中で実現するのは実は以下の2つである:1、PMS呼び出しscanDirLIスキャンインストール2、直接または間接呼び出しinstallPackageAsUserインストール
二、インストールプロセス
PMSが起動するとインストールシステムの各ディレクトリの下のapkをスキャンします.例えばsystem/app data/app vendor/appなどがscanDirLIメソッドを呼び出します.
scanPackageTracedLIでは簡単な呼び出しでscanPackageLIに呼び出されます
2.1、AndroidManifestを解析する.xml
解析xmlの概略呼び出し手順は、parsePackage->parseClusterPackage/parseMonolithicPackage->parseBaseApkです.
2.2インストールapkの更新、上書き等の判断
トレースコードを続行し、scanPackageLIを呼び出します.
2.3コア関数scanPackageDirtyLIのインストール
ブートスキャンでAPKをインストールしても、adbコマンドでAPKをインストールしても、最終的にはscanPackageDirtyLI関数を呼び出してAPKインストールを行います.コードが多すぎます.コードクリップは次のとおりです.
scanPackageDirtyLIプロセスのまとめは以下の通りである:1.まずframework-res.apkを単独で処理する.コードパスとリソースパス3を初期化する.共有ライブラリ4を作成する.署名情報の正当性を検証する.新しいパッケージのProviderが既存のパッケージと競合しないことを確認します.他のパッケージの権限を取得する必要があるかどうか7.プロセス名8を決定する.Libライブラリの更新設定操作等9.新しい設定パラメータ10に従う.更新インストールの時間11.4つのコンポーネント、権限、Instrumentation、解析されたこれらの情報をPMSに登録
小結
このPMSスキャンインストールシステムapkの流れは分析済みです.Android mainifest読み出しapk情報を解析し、インストール方法を判断し、scanPackageDirtyLI解析を呼び出します.
本文は主にAndroidのPMSがどのようにapkをインストールするかを分析して、コードはandroid Nに基づいています
一、取り付け方式
apkのインストールには以下の4つの方式がある:1、apkはPMSの起動に伴ってインストールする(本文)2、adb installインストール3、ODM内蔵ショップサイレントインストール4、apkを携帯電話にコピーし、インタフェースインストールの4つの方式はコードの中で実現するのは実は以下の2つである:1、PMS呼び出しscanDirLIスキャンインストール2、直接または間接呼び出しinstallPackageAsUserインストール
二、インストールプロセス
PMSが起動するとインストールシステムの各ディレクトリの下のapkをスキャンします.例えばsystem/app data/app vendor/appなどがscanDirLIメソッドを呼び出します.
private void scanDirLI(File dir, final int parseFlags, int scanFlags, long currentTime) {
final File[] files = dir.listFiles();
for (File file : files) {
final boolean isPackage = (isApkFile(file) || file.isDirectory())
&& !PackageInstallerService.isStageName(file.getName());
if (!isPackage) {
// Ignore entries which are not packages
continue;
}
try {
//
scanPackageTracedLI(file, parseFlags | PackageParser.PARSE_MUST_BE_APK,
scanFlags, currentTime, null);
} catch (PackageManagerException e) {
Slog.w(TAG, "Failed to parse " + file + ": " + e.getMessage());
//
if ((parseFlags & PackageParser.PARSE_IS_SYSTEM) == 0 &&
e.error == PackageManager.INSTALL_FAILED_INVALID_APK) {
logCriticalInfo(Log.WARN, "Deleting invalid package at " + file);
removeCodePathLI(file);
}
}
}
}
scanPackageTracedLIでは簡単な呼び出しでscanPackageLIに呼び出されます
2.1、AndroidManifestを解析する.xml
private PackageParser.Package scanPackageLI(File scanFile, int parseFlags, int scanFlags,
long currentTime, UserHandle user) throws PackageManagerException {
if (DEBUG_INSTALL) Slog.d(TAG, "Parsing: " + scanFile);
PackageParser pp = new PackageParser();
pp.setSeparateProcesses(mSeparateProcesses);
pp.setOnlyCoreApps(mOnlyCore);
pp.setDisplayMetrics(mMetrics);
if ((scanFlags & SCAN_TRUSTED_OVERLAY) != 0) {
parseFlags |= PackageParser.PARSE_TRUSTED_OVERLAY;
}
Trace.traceBegin(TRACE_TAG_PACKAGE_MANAGER, "parsePackage");
final PackageParser.Package pkg;
try {
// AndroidMainifest.xml
pkg = pp.parsePackage(scanFile, parseFlags);
} catch (PackageParserException e) {
throw PackageManagerException.from(e);
} finally {
Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
}
//
return scanPackageLI(pkg, scanFile, parseFlags, scanFlags, currentTime, user);
}
解析xmlの概略呼び出し手順は、parsePackage->parseClusterPackage/parseMonolithicPackage->parseBaseApkです.
private Package parseBaseApk(Resources res, XmlResourceParser parser, int flags,
String[] outError) throws XmlPullParserException, IOException {
...
// pkgName
final Package pkg = new Package(pkgName);
// AndroidManifest
TypedArray sa = res.obtainAttributes(parser,
com.android.internal.R.styleable.AndroidManifest);
// sa
pkg.mVersionCode = pkg.applicationInfo.versionCode = sa.getInteger(
com.android.internal.R.styleable.AndroidManifest_versionCode, 0);
pkg.baseRevisionCode = sa.getInteger(
com.android.internal.R.styleable.AndroidManifest_revisionCode, 0);
pkg.mVersionName = sa.getNonConfigurationString(
com.android.internal.R.styleable.AndroidManifest_versionName, 0);
if (pkg.mVersionName != null) {
pkg.mVersionName = pkg.mVersionName.intern();
}
// app
pkg.coreApp = parser.getAttributeBooleanValue(null, "coreApp", false);
//
sa.recycle();
//
return parseBaseApkCommon(pkg, null, res, parser, flags, outError);
}
private Package parseBaseApkCommon(Package pkg, Set acceptedTags, Resources res,
XmlResourceParser parser, int flags, String[] outError) throws XmlPullParserException,
IOException {
//
mParseInstrumentationArgs = null;
mParseActivityArgs = null;
mParseServiceArgs = null;
mParseProviderArgs = null;
int type;
boolean foundApp = false;
// AndroidManifest
TypedArray sa = res.obtainAttributes(parser,
com.android.internal.R.styleable.AndroidManifest);
// sa uid
String str = sa.getNonConfigurationString(
com.android.internal.R.styleable.AndroidManifest_sharedUserId, 0);
if (str != null && str.length() > 0) {
String nameError = validateName(str, true, false);
if (nameError != null && !"android".equals(pkg.packageName)) {
outError[0] = " specifies bad sharedUserId name \""
+ str + "\": " + nameError;
mParseError = PackageManager.INSTALL_PARSE_FAILED_BAD_SHARED_USER_ID;
return null;
}
pkg.mSharedUserId = str.intern();
pkg.mSharedUserLabel = sa.getResourceId(
com.android.internal.R.styleable.AndroidManifest_sharedUserLabel, 0);
}
pkg.installLocation = sa.getInteger(
com.android.internal.R.styleable.AndroidManifest_installLocation,
PARSE_DEFAULT_INSTALL_LOCATION);
pkg.applicationInfo.installLocation = pkg.installLocation;
...
int supportsSmallScreens = 1;
int supportsNormalScreens = 1;
int supportsLargeScreens = 1;
int supportsXLargeScreens = 1;
int resizeable = 1;
int anyDensity = 1;
//
int outerDepth = parser.getDepth();
while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
&& (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
continue;
}
String tagName = parser.getName();
if (acceptedTags != null && !acceptedTags.contains(tagName)) {
Slog.w(TAG, "Skipping unsupported element under : "
+ tagName + " at " + mArchiveSourcePath + " "
+ parser.getPositionDescription());
XmlUtils.skipCurrentTag(parser);
continue;
}
//TAG:application
if (tagName.equals(TAG_APPLICATION)) {
if (foundApp) {
if (RIGID_PARSER) {
outError[0] = " has more than one ";
mParseError = PackageManager.INSTALL_PARSE_FAILED_MANIFEST_MALFORMED;
return null;
} else {
Slog.w(TAG, " has more than one ");
XmlUtils.skipCurrentTag(parser);
continue;
}
}
foundApp = true;
if (!parseBaseApplication(pkg, res, parser, flags, outError)) {
return null;
}
} else if (tagName.equals(TAG_OVERLAY)) { //TAG:overlay
sa = res.obtainAttributes(parser,
com.android.internal.R.styleable.AndroidManifestResourceOverlay);
pkg.mOverlayTarget = sa.getString(
com.android.internal.R.styleable.AndroidManifestResourceOverlay_targetPackage);
pkg.mOverlayPriority = sa.getInt(
com.android.internal.R.styleable.AndroidManifestResourceOverlay_priority,
-1);
sa.recycle();
if (pkg.mOverlayTarget == null) {
outError[0] = " does not specify a target package";
mParseError = PackageManager.INSTALL_PARSE_FAILED_MANIFEST_MALFORMED;
return null;
}
if (pkg.mOverlayPriority < 0 || pkg.mOverlayPriority > 9999) {
outError[0] = " priority must be between 0 and 9999";
mParseError =
PackageManager.INSTALL_PARSE_FAILED_MANIFEST_MALFORMED;
return null;
}
XmlUtils.skipCurrentTag(parser);
} else if (tagName.equals(TAG_KEY_SETS)) { //key-sets
if (!parseKeySets(pkg, res, parser, outError)) {
return null;
}
}
...permission、uses-sdk
return pkg;
}
2.2インストールapkの更新、上書き等の判断
トレースコードを続行し、scanPackageLIを呼び出します.
private PackageParser.Package scanPackageLI(PackageParser.Package pkg, File scanFile,
final int policyFlags, int scanFlags, long currentTime, UserHandle user)
throws PackageManagerException {
...
//scanPackageInternalLI androidmainifest ， 。
PackageParser.Package scannedPkg = scanPackageInternalLI(pkg, scanFile, policyFlags,
scanFlags, currentTime, user);
// Scan the children
final int childCount = (pkg.childPackages != null) ? pkg.childPackages.size() : 0;
for (int i = 0; i < childCount; i++) {
PackageParser.Package childPackage = pkg.childPackages.get(i);
scanPackageInternalLI(childPackage, scanFile, policyFlags, scanFlags,
currentTime, user);
}
...
return scannedPkg;
}
private PackageParser.Package scanPackageInternalLI(PackageParser.Package pkg, File scanFile,
int policyFlags, int scanFlags, long currentTime, UserHandle user)
throws PackageManagerException {
...
synchronized (mPackages) {
// 、
String oldName = mSettings.mRenamedPackages.get(pkg.packageName);
if (pkg.mOriginalPackages != null && pkg.mOriginalPackages.contains(oldName)) {
ps = mSettings.peekPackageLPr(oldName);
}
// If there was no original package, see one for the real package name.
if (ps == null) {
ps = mSettings.peekPackageLPr(pkg.packageName);
}
updatedPkg = mSettings.getDisabledSystemPkgLPr(ps != null ? ps.name : pkg.packageName);
if (DEBUG_INSTALL && updatedPkg != null) Slog.d(TAG, "updatedPkg = " + updatedPkg);
/// vendor app( ) null
if (!isFirstBoot() && (isVendorApp(pkg) || isSystemApp(pkg))
&& ((updatedPkg != null)
|| (ps.getInstallStatus() == PackageSettingBase.PKG_INSTALL_INCOMPLETE))) {
Slog.d(TAG, "Skip scanning " + scanFile.toString() + ", pacakge " + updatedPkg +
", install status: " + ps.getInstallStatus());
return null;
} else if (ps == null && updatedPkg != null) {
Slog.d(TAG, "Skip scanning uninstalled package: " + pkg.packageName);
return null;
}
...
boolean updatedPkgBetter = false;
// ， vendor
if (updatedPkg != null &&
(((policyFlags & PackageParser.PARSE_IS_SYSTEM) != 0) ||
((policyFlags & PackageParser.PARSE_IS_OPERATOR) != 0))) {
// priv-app ， Flag
if (locationIsPrivileged(scanFile)) {
updatedPkg.pkgPrivateFlags |= ApplicationInfo.PRIVATE_FLAG_PRIVILEGED;
} else {
updatedPkg.pkgPrivateFlags &= ~ApplicationInfo.PRIVATE_FLAG_PRIVILEGED;
}
if (ps != null && !ps.codePath.equals(scanFile)) {
// ， app
/** M: [Operator] Allow vendor package downgrade. @{ */
/// Always install the updated one on data partition
if (pkg.mVersionCode < ps.versionCode
|| ((policyFlags & PackageParser.PARSE_IS_OPERATOR) != 0)) {
...
if (!updatedPkg.codePath.equals(scanFile)) {
updatedPkg.codePath = scanFile;
updatedPkg.codePathString = scanFile.toString();
updatedPkg.resourcePath = scanFile;
updatedPkg.resourcePathString = scanFile.toString();
}
updatedPkg.pkg = pkg;
updatedPkg.versionCode = pkg.mVersionCode;
// Update the disabled system child packages to point to the package too.
final int childCount = updatedPkg.childPackageNames != null
? updatedPkg.childPackageNames.size() : 0;
for (int i = 0; i < childCount; i++) {
String childPackageName = updatedPkg.childPackageNames.get(i);
PackageSetting updatedChildPkg = mSettings.getDisabledSystemPkgLPr(
childPackageName);
if (updatedChildPkg != null) {
updatedChildPkg.pkg = pkg;
updatedChildPkg.versionCode = pkg.mVersionCode;
}
}
} else {
//system app data app
synchronized (mPackages) {
// Just remove the loaded entries from package lists.
mPackages.remove(ps.name);
}
InstallArgs args = createInstallArgsForExisting(packageFlagsToInstallFlags(ps),
ps.codePathString, ps.resourcePathString, getAppDexInstructionSets(ps));
synchronized (mInstallLock) {
args.cleanUpResourcesLI();
}
synchronized (mPackages) {
mSettings.enableSystemPackageLPw(ps.name);
}
updatedPkgBetter = true;
}
}
}
//
if (updatedPkg != null) {
// system app flag:PARSE_IS_SYSTEM
if (isSystemApp(updatedPkg)) {
policyFlags |= PackageParser.PARSE_IS_SYSTEM;
}
// vendor app flags
if ((isVendorApp(updatedPkg) || locationIsOperator(updatedPkg.codePath))
&& locationIsOperator(ps.codePath)) {
policyFlags |= PackageParser.PARSE_IS_OPERATOR;
}
if ((updatedPkg.pkgPrivateFlags & ApplicationInfo.PRIVATE_FLAG_PRIVILEGED) != 0) {
policyFlags |= PackageParser.PARSE_IS_PRIVILEGED;
}
}
//
collectCertificatesLI(ps, pkg, scanFile, policyFlags);
// system app， app
boolean shouldHideSystemApp = false;
if (updatedPkg == null && ps != null
&& (policyFlags & PackageParser.PARSE_IS_SYSTEM_DIR) != 0 && !isSystemApp(ps)) {
// ，
if (compareSignatures(ps.signatures.mSignatures, pkg.mSignatures)
!= PackageManager.SIGNATURE_MATCH) {
logCriticalInfo(Log.WARN, "Package " + ps.name + " appeared on system, but"
+ " signatures don't match existing userdata copy; removing");
try (PackageFreezer freezer = freezePackage(pkg.packageName,
"scanPackageInternalLI")) {
deletePackageLIF(pkg.packageName, null, true, null, 0, null, false, null);
}
ps = null;
} else {
// app ， app，
if (pkg.mVersionCode <= ps.versionCode) {
shouldHideSystemApp = true;
logCriticalInfo(Log.INFO, "Package " + ps.name + " appeared at " + scanFile
+ " but new version " + pkg.mVersionCode + " better than installed "
+ ps.versionCode + "; hiding system");
} else {
// app ， app system app
InstallArgs args = createInstallArgsForExisting(packageFlagsToInstallFlags(ps),
ps.codePathString, ps.resourcePathString, getAppDexInstructionSets(ps));
synchronized (mInstallLock) {
args.cleanUpResourcesLI();
}
}
}
}
// app ， PackageSettings
if ((policyFlags & PackageParser.PARSE_IS_SYSTEM_DIR) == 0) {
if (ps != null && !ps.codePath.equals(ps.resourcePath)) {
policyFlags |= PackageParser.PARSE_FORWARD_LOCK;
}
}
// TODO: extend to support forward-locked splits
String resourcePath = null;
String baseResourcePath = null;
if ((policyFlags & PackageParser.PARSE_FORWARD_LOCK) != 0 && !updatedPkgBetter) {
if (ps != null && ps.resourcePathString != null) {
resourcePath = ps.resourcePathString;
baseResourcePath = ps.resourcePathString;
} else {
// Should not happen at all. Just log an error.
Slog.e(TAG, "Resource path not set for package " + pkg.packageName);
}
} else {
resourcePath = pkg.codePath;
baseResourcePath = pkg.baseCodePath;
}
// app
pkg.setApplicationVolumeUuid(pkg.volumeUuid);
pkg.setApplicationInfoCodePath(pkg.codePath);
pkg.setApplicationInfoBaseCodePath(pkg.baseCodePath);
pkg.setApplicationInfoSplitCodePaths(pkg.splitCodePaths);
pkg.setApplicationInfoResourcePath(resourcePath);
pkg.setApplicationInfoBaseResourcePath(baseResourcePath);
pkg.setApplicationInfoSplitResourcePaths(pkg.splitCodePaths);
// Note that we invoke the following method only if we are about to unpack an application
PackageParser.Package scannedPkg = scanPackageLI(pkg, policyFlags, scanFlags
| SCAN_UPDATE_SIGNATURE, currentTime, user);
if (shouldHideSystemApp) {
synchronized (mPackages) {
mSettings.disableSystemPackageLPw(pkg.packageName, true);
}
}
return scannedPkg;
}
private PackageParser.Package scanPackageLI(PackageParser.Package pkg, final int policyFlags,
int scanFlags, long currentTime, UserHandle user) throws PackageManagerException {
boolean success = false;
try {
final PackageParser.Package res = scanPackageDirtyLI(pkg, policyFlags, scanFlags,
currentTime, user);
success = true;
return res;
} finally {
if (!success && (scanFlags & SCAN_DELETE_DATA_ON_FAILURES) != 0) {
// DELETE_DATA_ON_FAILURES is only used by frozen paths
destroyAppDataLIF(pkg, UserHandle.USER_ALL,
StorageManager.FLAG_STORAGE_DE | StorageManager.FLAG_STORAGE_CE);
destroyAppProfilesLIF(pkg, UserHandle.USER_ALL);
}
}
}
2.3コア関数scanPackageDirtyLIのインストール
ブートスキャンでAPKをインストールしても、adbコマンドでAPKをインストールしても、最終的にはscanPackageDirtyLI関数を呼び出してAPKインストールを行います.コードが多すぎます.コードクリップは次のとおりです.
private PackageParser.Package scanPackageDirtyLI(PackageParser.Package pkg,
final int policyFlags, final int scanFlags, long currentTime, UserHandle user)
throws PackageManagerException {
//1. framework-res.apk
if (pkg.packageName.equals("android")) {
synchronized (mPackages) {
if ((scanFlags & SCAN_CHECK_ONLY) == 0) {
// Set up information for our fall-back user intent resolution activity.
mPlatformPackage = pkg;
pkg.mVersionCode = mSdkVersion;
mAndroidApplication = pkg.applicationInfo;
if (!mResolverReplaced) {
mResolveActivity.applicationInfo = mAndroidApplication;
mResolveActivity.name = ResolverActivity.class.getName();
mResolveActivity.packageName = mAndroidApplication.packageName;
mResolveActivity.processName = "system:ui";
mResolveActivity.launchMode = ActivityInfo.LAUNCH_MULTIPLE;
mResolveActivity.documentLaunchMode = ActivityInfo.DOCUMENT_LAUNCH_NEVER;
mResolveActivity.flags = ActivityInfo.FLAG_EXCLUDE_FROM_RECENTS;
mResolveActivity.theme = R.style.Theme_Material_Dialog_Alert;
mResolveActivity.exported = true;
mResolveActivity.enabled = true;
mResolveActivity.resizeMode = ActivityInfo.RESIZE_MODE_RESIZEABLE;
mResolveActivity.configChanges = ActivityInfo.CONFIG_SCREEN_SIZE
| ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE
| ActivityInfo.CONFIG_SCREEN_LAYOUT
| ActivityInfo.CONFIG_ORIENTATION
| ActivityInfo.CONFIG_KEYBOARD
| ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
mResolveInfo.activityInfo = mResolveActivity;
mResolveInfo.priority = 0;
mResolveInfo.preferredOrder = 0;
mResolveInfo.match = 0;
mResolveComponentName = new ComponentName(
mAndroidApplication.packageName, mResolveActivity.name);
}
}
}
}
//
synchronized (mPackages) {
if (mPackages.containsKey(pkg.packageName)
|| mSharedLibraries.containsKey(pkg.packageName)) {
throw new PackageManagerException(INSTALL_FAILED_DUPLICATE_PACKAGE,
"Application package " + pkg.packageName
+ " already installed. Skipping duplicate.");
}
if ((scanFlags & SCAN_REQUIRE_KNOWN) != 0) {
if (mExpectingBetter.containsKey(pkg.packageName)) {
logCriticalInfo(Log.WARN,
"Relax SCAN_REQUIRE_KNOWN requirement for package " + pkg.packageName);
} else {
PackageSetting known = mSettings.peekPackageLPr(pkg.packageName);
...
}
}
//2.
File destCodeFile = new File(pkg.applicationInfo.getCodePath());
File destResourceFile = new File(pkg.applicationInfo.getResourcePath());
//
synchronized (mPackages) {
if (pkg.mSharedUserId != null) {
suid = mSettings.getSharedUserLPw(pkg.mSharedUserId, 0, 0, true);
...
}
PackageSetting origPackage = null;
String realName = null;
if (pkg.mOriginalPackages != null) {
// do this
final String renamed = mSettings.mRenamedPackages.get(pkg.mRealPackage);
if (pkg.mOriginalPackages.contains(renamed)) {
realName = pkg.mRealPackage;
if (!pkg.packageName.equals(renamed)) {
pkg.setPackageName(renamed);
}
} else {
for (int i=pkg.mOriginalPackages.size()-1; i>=0; i--) {
if ((origPackage = mSettings.peekPackageLPr(
pkg.mOriginalPackages.get(i))) != null) {
if (!verifyPackageUpdateLPr(origPackage, pkg)) {
origPackage = null;
continue;
} else if (origPackage.sharedUser != null) {
// Make sure uid is compatible between packages.
if (!origPackage.sharedUser.name.equals(pkg.mSharedUserId)) {
origPackage = null;
continue;
}
// TODO: Add case when shared user id is added [b/28144775]
} else {
if (DEBUG_UPGRADE) Log.v(TAG, "Renaming new package "
+ pkg.packageName + " to old name " + origPackage.name);
}
break;
}
}
}
}
// PackageSetting
pkgSetting = mSettings.getPackageLPw(pkg, origPackage, realName, suid, destCodeFile,
destResourceFile, pkg.applicationInfo.nativeLibraryRootDir,
pkg.applicationInfo.primaryCpuAbi,
pkg.applicationInfo.secondaryCpuAbi,
pkg.applicationInfo.flags, pkg.applicationInfo.privateFlags,
pkg.applicationInfo.flagsEx,
user, false);
if (pkgSetting == null) {
throw new PackageManagerException(INSTALL_FAILED_INSUFFICIENT_STORAGE,
"Creating application package " + pkg.packageName + " failed");
}
if (pkgSetting.origPackage != null) {
pkg.setPackageName(origPackage.name);
String msg = "New package " + pkgSetting.realName
+ " renamed to replace old package " + pkgSetting.name;
reportSettingsProblem(Log.WARN, msg);
// Make a note of it.
if ((scanFlags & SCAN_CHECK_ONLY) == 0) {
mTransferedPackages.add(origPackage.name);
}
// No longer need to retain this.
pkgSetting.origPackage = null;
}
if ((scanFlags & SCAN_CHECK_ONLY) == 0 && realName != null) {
// Make a note of it.
mTransferedPackages.add(pkg.packageName);
}
// 3.
if ((policyFlags&PackageParser.PARSE_IS_SYSTEM_DIR) == 0) {
updateSharedLibrariesLPw(pkg, null);
}
// 4.
pkg.applicationInfo.uid = pkgSetting.appId;
pkg.mExtras = pkgSetting;
if (shouldCheckUpgradeKeySetLP(pkgSetting, scanFlags)) {
if (checkUpgradeKeySetLP(pkgSetting, pkg)) {
pkgSetting.signatures.mSignatures = pkg.mSignatures;
} else {
....
}
} else {
try {
verifySignaturesLP(pkgSetting, pkg);
pkgSetting.signatures.mSignatures = pkg.mSignatures;
} catch (PackageManagerException e) {
if ((policyFlags & PackageParser.PARSE_IS_SYSTEM_DIR) == 0
|| (policyFlags & PackageParser.PARSE_IS_OPERATOR) == 0) {
throw e;
}
pkgSetting.signatures.mSignatures = pkg.mSignatures;
if (pkgSetting.sharedUser != null) {
if (compareSignatures(pkgSetting.sharedUser.signatures.mSignatures,
pkg.mSignatures) != PackageManager.SIGNATURE_MATCH) {
throw new PackageManagerException(
INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES,
"Signature mismatch for shared user: "
+ pkgSetting.sharedUser);
}
}
String msg = "System package " + pkg.packageName
+ " signature changed; retaining data.";
reportSettingsProblem(Log.WARN, msg);
}
}
//5. Provider
if ((scanFlags & SCAN_NEW_INSTALL) != 0) {
final int N = pkg.providers.size();
int i;
for (i=0; i= 0; i--) {
final String origName = pkg.mAdoptPermissions.get(i);
final PackageSetting orig = mSettings.peekPackageLPr(origName);
if (orig != null) {
if (verifyPackageUpdateLPr(orig, pkg)) {
Slog.i(TAG, "Adopting permissions from " + origName + " to "
+ pkg.packageName);
mSettings.transferPermissionsLPw(origName, pkg.packageName);
}
}
}
}
final String pkgName = pkg.packageName;
//7.
final long scanFileTime = scanFile.lastModified();
final boolean forceDex = (scanFlags & SCAN_FORCE_DEX) != 0;
pkg.applicationInfo.processName = fixProcessName(
pkg.applicationInfo.packageName,
pkg.applicationInfo.processName,
pkg.applicationInfo.uid);
if (pkg != mPlatformPackage) {
// Get all of our default paths setup
pkg.applicationInfo.initForUser(UserHandle.USER_SYSTEM);
}
final String path = scanFile.getPath();
final String cpuAbiOverride = deriveAbiOverride(pkg.cpuAbiOverride, pkgSetting);
//Lib
if ((scanFlags & SCAN_NEW_INSTALL) == 0) {
derivePackageAbi(pkg, scanFile, cpuAbiOverride, true /* extract libs */);
if (isSystemApp(pkg) && !pkg.isUpdatedSystemApp() &&
pkg.applicationInfo.primaryCpuAbi == null) {
setBundledAppAbisAndRoots(pkg, pkgSetting);
setNativeLibraryPaths(pkg);
}
} else {
if ((scanFlags & SCAN_MOVE) != 0) {
pkg.applicationInfo.primaryCpuAbi = pkgSetting.primaryCpuAbiString;
pkg.applicationInfo.secondaryCpuAbi = pkgSetting.secondaryCpuAbiString;
}
setNativeLibraryPaths(pkg);
}
//cpu
pkgSetting.primaryCpuAbiString = pkg.applicationInfo.primaryCpuAbi;
pkgSetting.secondaryCpuAbiString = pkg.applicationInfo.secondaryCpuAbi;
pkgSetting.cpuAbiOverrideString = cpuAbiOverride;
pkg.cpuAbiOverride = cpuAbiOverride;
// lib 、
pkgSetting.legacyNativeLibraryPathString = pkg.applicationInfo.nativeLibraryRootDir;
ArrayList clientLibPkgs = null;
if ((scanFlags & SCAN_CHECK_ONLY) != 0) {
if (nonMutatedPs != null) {
synchronized (mPackages) {
mSettings.mPackages.put(nonMutatedPs.name, nonMutatedPs);
}
}
return pkg;
}
//8. Lib
synchronized (mPackages) {
if ((pkg.applicationInfo.flags&ApplicationInfo.FLAG_SYSTEM) != 0) {
// Only system apps can add new shared libraries.
if (pkg.libraryNames != null) {
for (int i=0; i iter = mSettings.mPackagesToBeCleaned.iterator();
while (iter.hasNext()) {
PackageCleanItem item = iter.next();
if (pkgName.equals(item.packageName)) {
iter.remove();
}
}
//10.
if (currentTime != 0) {
if (pkgSetting.firstInstallTime == 0) {
pkgSetting.firstInstallTime = pkgSetting.lastUpdateTime = currentTime;
} else if ((scanFlags&SCAN_UPDATE_TIME) != 0) {
pkgSetting.lastUpdateTime = currentTime;
}
} else if (pkgSetting.firstInstallTime == 0) {
// We need *something*. Take time time stamp of the file.
pkgSetting.firstInstallTime = pkgSetting.lastUpdateTime = scanFileTime;
} else if ((policyFlags&PackageParser.PARSE_IS_SYSTEM_DIR) != 0) {
if (scanFileTime != pkgSetting.timeStamp) {
// A package on the system image has changed; consider this
// to be an update.
pkgSetting.lastUpdateTime = scanFileTime;
}
}
//11.
// apk provider
int N = pkg.providers.size();
StringBuilder r = null;
int i;
for (i=0; i Build.VERSION_CODES.LOLLIPOP_MR1) {
p.group = mPermissionGroups.get(p.info.group);
// Warn for a permission in an unknown group.
if (p.info.group != null && p.group == null) {
Slog.w(TAG, "Permission " + p.info.name + " from package "
+ p.info.packageName + " in an unknown group " + p.info.group);
}
}
ArrayMap permissionMap =
p.tree ? mSettings.mPermissionTrees
: mSettings.mPermissions;
BasePermission bp = permissionMap.get(p.info.name);
// Allow system apps to redefine non-system permissions
if (bp != null && !Objects.equals(bp.sourcePackage, p.info.packageName)) {
final boolean currentOwnerIsSystem = (bp.perm != null
&& isSystemApp(bp.perm.owner));
if (isSystemApp(p.owner)) {
if (bp.type == BasePermission.TYPE_BUILTIN && bp.perm == null) {
// It's a built-in permission and no owner, take ownership now
bp.packageSetting = pkgSetting;
bp.perm = p;
bp.uid = pkg.applicationInfo.uid;
bp.sourcePackage = p.info.packageName;
p.info.flags |= PermissionInfo.FLAG_INSTALLED;
} else if (!currentOwnerIsSystem) {
String msg = "New decl " + p.owner + " of permission "
+ p.info.name + " is system; overriding " + bp.sourcePackage;
reportSettingsProblem(Log.WARN, msg);
bp = null;
}
}
}
if (bp == null) {
bp = new BasePermission(p.info.name, p.info.packageName,
BasePermission.TYPE_NORMAL);
permissionMap.put(p.info.name, bp);
}
if (bp.perm == null) {
if (bp.sourcePackage == null
|| bp.sourcePackage.equals(p.info.packageName)) {
BasePermission tree = findPermissionTreeLP(p.info.name);
if (tree == null
|| tree.sourcePackage.equals(p.info.packageName)) {
bp.packageSetting = pkgSetting;
bp.perm = p;
bp.uid = pkg.applicationInfo.uid;
bp.sourcePackage = p.info.packageName;
p.info.flags |= PermissionInfo.FLAG_INSTALLED;
if ((policyFlags&PackageParser.PARSE_CHATTY) != 0) {
if (r == null) {
r = new StringBuilder(256);
} else {
r.append(' ');
}
r.append(p.info.name);
}
} else {
Slog.w(TAG, "Permission " + p.info.name + " from package "
+ p.info.packageName + " ignored: base tree "
+ tree.name + " is from package "
+ tree.sourcePackage);
}
} else {
Slog.w(TAG, "Permission " + p.info.name + " from package "
+ p.info.packageName + " ignored: original from "
+ bp.sourcePackage);
}
} else if ((policyFlags&PackageParser.PARSE_CHATTY) != 0) {
if (r == null) {
r = new StringBuilder(256);
} else {
r.append(' ');
}
r.append("DUP:");
r.append(p.info.name);
}
if (bp.perm == p) {
bp.protectionLevel = p.info.protectionLevel;
}
}
if (r != null) {
if (DEBUG_PACKAGE_SCANNING) Log.d(TAG, " Permissions: " + r);
}
//Instrumentation (Instrumentation application activity )
N = pkg.instrumentation.size();
r = null;
for (i=0; i());
}
ArrayMap map = mOverlays.get(pkg.mOverlayTarget);
map.put(pkg.packageName, pkg);
PackageParser.Package orig = mPackages.get(pkg.mOverlayTarget);
if (orig != null && !createIdmapForPackagePairLI(orig, pkg)) {
createIdmapFailed = true;
}
}
} else if (mOverlays.containsKey(pkg.packageName) &&
!pkg.packageName.equals("android") &&
/// M: ALPS02521810, support mediatek-res runtime overlay
!pkg.packageName.equals("com.mediatek")) {
// This is a regular package, with one or more known overlay packages.
createIdmapsForPackageLI(pkg);
}
}
Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
if (createIdmapFailed) {
throw new PackageManagerException(INSTALL_FAILED_UPDATE_INCOMPATIBLE,
"scanPackageLI failed to createIdmap");
}
return pkg;
}
scanPackageDirtyLIプロセスのまとめは以下の通りである:1.まずframework-res.apkを単独で処理する.コードパスとリソースパス3を初期化する.共有ライブラリ4を作成する.署名情報の正当性を検証する.新しいパッケージのProviderが既存のパッケージと競合しないことを確認します.他のパッケージの権限を取得する必要があるかどうか7.プロセス名8を決定する.Libライブラリの更新設定操作等9.新しい設定パラメータ10に従う.更新インストールの時間11.4つのコンポーネント、権限、Instrumentation、解析されたこれらの情報をPMSに登録
小結
このPMSスキャンインストールシステムapkの流れは分析済みです.Android mainifest読み出しapk情報を解析し、インストール方法を判断し、scanPackageDirtyLI解析を呼び出します.