PackageDexOptimizer.java revision f1ff36f0f99ebb41d0c7e0f3248506a56998fa3f
1/*
2 * Copyright (C) 2015 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
17package com.android.server.pm;
18
19import android.annotation.Nullable;
20import android.content.Context;
21import android.content.pm.ApplicationInfo;
22import android.content.pm.PackageParser;
23import android.os.FileUtils;
24import android.os.PowerManager;
25import android.os.SystemClock;
26import android.os.UserHandle;
27import android.os.WorkSource;
28import android.util.Log;
29import android.util.Slog;
30
31import com.android.internal.annotations.GuardedBy;
32import com.android.internal.util.IndentingPrintWriter;
33import com.android.server.pm.Installer.InstallerException;
34import com.android.server.pm.dex.DexoptOptions;
35import com.android.server.pm.dex.DexoptUtils;
36import com.android.server.pm.dex.PackageDexUsage;
37
38import java.io.File;
39import java.io.IOException;
40import java.util.ArrayList;
41import java.util.List;
42
43import dalvik.system.DexFile;
44
45import static com.android.server.pm.Installer.DEXOPT_BOOTCOMPLETE;
46import static com.android.server.pm.Installer.DEXOPT_DEBUGGABLE;
47import static com.android.server.pm.Installer.DEXOPT_PROFILE_GUIDED;
48import static com.android.server.pm.Installer.DEXOPT_PUBLIC;
49import static com.android.server.pm.Installer.DEXOPT_SECONDARY_DEX;
50import static com.android.server.pm.Installer.DEXOPT_FORCE;
51import static com.android.server.pm.Installer.DEXOPT_STORAGE_CE;
52import static com.android.server.pm.Installer.DEXOPT_STORAGE_DE;
53import static com.android.server.pm.InstructionSets.getAppDexInstructionSets;
54import static com.android.server.pm.InstructionSets.getDexCodeInstructionSets;
55
56import static com.android.server.pm.PackageManagerService.WATCHDOG_TIMEOUT;
57
58import static dalvik.system.DexFile.getNonProfileGuidedCompilerFilter;
59import static dalvik.system.DexFile.getSafeModeCompilerFilter;
60import static dalvik.system.DexFile.isProfileGuidedCompilerFilter;
61
62/**
63 * Helper class for running dexopt command on packages.
64 */
65public class PackageDexOptimizer {
66    private static final String TAG = "PackageManager.DexOptimizer";
67    static final String OAT_DIR_NAME = "oat";
68    // TODO b/19550105 Remove error codes and use exceptions
69    public static final int DEX_OPT_SKIPPED = 0;
70    public static final int DEX_OPT_PERFORMED = 1;
71    public static final int DEX_OPT_FAILED = -1;
72    // One minute over PM WATCHDOG_TIMEOUT
73    private static final long WAKELOCK_TIMEOUT_MS = WATCHDOG_TIMEOUT + 1000 * 60;
74
75    /** Special library name that skips shared libraries check during compilation. */
76    public static final String SKIP_SHARED_LIBRARY_CHECK = "&";
77
78    @GuardedBy("mInstallLock")
79    private final Installer mInstaller;
80    private final Object mInstallLock;
81
82    @GuardedBy("mInstallLock")
83    private final PowerManager.WakeLock mDexoptWakeLock;
84    private volatile boolean mSystemReady;
85
86    PackageDexOptimizer(Installer installer, Object installLock, Context context,
87            String wakeLockTag) {
88        this.mInstaller = installer;
89        this.mInstallLock = installLock;
90
91        PowerManager powerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
92        mDexoptWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, wakeLockTag);
93    }
94
95    protected PackageDexOptimizer(PackageDexOptimizer from) {
96        this.mInstaller = from.mInstaller;
97        this.mInstallLock = from.mInstallLock;
98        this.mDexoptWakeLock = from.mDexoptWakeLock;
99        this.mSystemReady = from.mSystemReady;
100    }
101
102    static boolean canOptimizePackage(PackageParser.Package pkg) {
103        return (pkg.applicationInfo.flags & ApplicationInfo.FLAG_HAS_CODE) != 0;
104    }
105
106    /**
107     * Performs dexopt on all code paths and libraries of the specified package for specified
108     * instruction sets.
109     *
110     * <p>Calls to {@link com.android.server.pm.Installer#dexopt} on {@link #mInstaller} are
111     * synchronized on {@link #mInstallLock}.
112     */
113    int performDexOpt(PackageParser.Package pkg, String[] sharedLibraries,
114            String[] instructionSets, CompilerStats.PackageStats packageStats,
115            boolean isUsedByOtherApps, DexoptOptions options) {
116        if (!canOptimizePackage(pkg)) {
117            return DEX_OPT_SKIPPED;
118        }
119        synchronized (mInstallLock) {
120            final long acquireTime = acquireWakeLockLI(pkg.applicationInfo.uid);
121            try {
122                return performDexOptLI(pkg, sharedLibraries, instructionSets,
123                        packageStats, isUsedByOtherApps, options);
124            } finally {
125                releaseWakeLockLI(acquireTime);
126            }
127        }
128    }
129
130    /**
131     * Performs dexopt on all code paths of the given package.
132     * It assumes the install lock is held.
133     */
134    @GuardedBy("mInstallLock")
135    private int performDexOptLI(PackageParser.Package pkg, String[] sharedLibraries,
136            String[] targetInstructionSets, CompilerStats.PackageStats packageStats,
137            boolean isUsedByOtherApps, DexoptOptions options) {
138        final String[] instructionSets = targetInstructionSets != null ?
139                targetInstructionSets : getAppDexInstructionSets(pkg.applicationInfo);
140        final String[] dexCodeInstructionSets = getDexCodeInstructionSets(instructionSets);
141        final List<String> paths = pkg.getAllCodePaths();
142        final int sharedGid = UserHandle.getSharedAppGid(pkg.applicationInfo.uid);
143
144        final String compilerFilter = getRealCompilerFilter(pkg.applicationInfo,
145                options.getCompilerFilter(), isUsedByOtherApps);
146        final boolean profileUpdated = options.isCheckForProfileUpdates() &&
147                isProfileUpdated(pkg, sharedGid, compilerFilter);
148
149        // Get the dexopt flags after getRealCompilerFilter to make sure we get the correct flags.
150        final int dexoptFlags = getDexFlags(pkg, compilerFilter, options.isBootComplete());
151
152        // Get the class loader context dependencies.
153        // For each code path in the package, this array contains the class loader context that
154        // needs to be passed to dexopt in order to ensure correct optimizations.
155        String[] classLoaderContexts = DexoptUtils.getClassLoaderContexts(
156                pkg.applicationInfo, sharedLibraries);
157
158        int result = DEX_OPT_SKIPPED;
159        for (int i = 0; i < paths.size(); i++) {
160            // Skip paths that have no code.
161            if ((i == 0 && (pkg.applicationInfo.flags & ApplicationInfo.FLAG_HAS_CODE) == 0) ||
162                    (i != 0 && (pkg.splitFlags[i - 1] & ApplicationInfo.FLAG_HAS_CODE) == 0)) {
163                continue;
164            }
165            // Append shared libraries with split dependencies for this split.
166            String path = paths.get(i);
167            if (options.getSplitName() != null) {
168                // We are asked to compile only a specific split. Check that the current path is
169                // what we are looking for.
170                if (!options.getSplitName().equals(new File(path).getName())) {
171                    continue;
172                }
173            }
174
175            for (String dexCodeIsa : dexCodeInstructionSets) {
176                int newResult = dexOptPath(pkg, path, dexCodeIsa, compilerFilter,
177                        profileUpdated, classLoaderContexts[i], dexoptFlags, sharedGid,
178                        packageStats, options.isDowngrade());
179                // The end result is:
180                //  - FAILED if any path failed,
181                //  - PERFORMED if at least one path needed compilation,
182                //  - SKIPPED when all paths are up to date
183                if ((result != DEX_OPT_FAILED) && (newResult != DEX_OPT_SKIPPED)) {
184                    result = newResult;
185                }
186            }
187        }
188        return result;
189    }
190
191    /**
192     * Performs dexopt on the {@code path} belonging to the package {@code pkg}.
193     *
194     * @return
195     *      DEX_OPT_FAILED if there was any exception during dexopt
196     *      DEX_OPT_PERFORMED if dexopt was performed successfully on the given path.
197     *      DEX_OPT_SKIPPED if the path does not need to be deopt-ed.
198     */
199    @GuardedBy("mInstallLock")
200    private int dexOptPath(PackageParser.Package pkg, String path, String isa,
201            String compilerFilter, boolean profileUpdated, String sharedLibrariesPath,
202            int dexoptFlags, int uid, CompilerStats.PackageStats packageStats, boolean downgrade) {
203        int dexoptNeeded = getDexoptNeeded(path, isa, compilerFilter, profileUpdated, downgrade);
204        if (Math.abs(dexoptNeeded) == DexFile.NO_DEXOPT_NEEDED) {
205            return DEX_OPT_SKIPPED;
206        }
207
208        // TODO(calin): there's no need to try to create the oat dir over and over again,
209        //              especially since it involve an extra installd call. We should create
210        //              if (if supported) on the fly during the dexopt call.
211        String oatDir = createOatDirIfSupported(pkg, isa);
212
213        Log.i(TAG, "Running dexopt (dexoptNeeded=" + dexoptNeeded + ") on: " + path
214                + " pkg=" + pkg.applicationInfo.packageName + " isa=" + isa
215                + " dexoptFlags=" + printDexoptFlags(dexoptFlags)
216                + " target-filter=" + compilerFilter + " oatDir=" + oatDir
217                + " sharedLibraries=" + sharedLibrariesPath);
218
219        try {
220            long startTime = System.currentTimeMillis();
221
222            // TODO: Consider adding 2 different APIs for primary and secondary dexopt.
223            // installd only uses downgrade flag for secondary dex files and ignores it for
224            // primary dex files.
225            mInstaller.dexopt(path, uid, pkg.packageName, isa, dexoptNeeded, oatDir, dexoptFlags,
226                    compilerFilter, pkg.volumeUuid, sharedLibrariesPath, pkg.applicationInfo.seInfo,
227                    false /* downgrade*/);
228
229            if (packageStats != null) {
230                long endTime = System.currentTimeMillis();
231                packageStats.setCompileTime(path, (int)(endTime - startTime));
232            }
233            return DEX_OPT_PERFORMED;
234        } catch (InstallerException e) {
235            Slog.w(TAG, "Failed to dexopt", e);
236            return DEX_OPT_FAILED;
237        }
238    }
239
240    /**
241     * Performs dexopt on the secondary dex {@code path} belonging to the app {@code info}.
242     *
243     * @return
244     *      DEX_OPT_FAILED if there was any exception during dexopt
245     *      DEX_OPT_PERFORMED if dexopt was performed successfully on the given path.
246     * NOTE that DEX_OPT_PERFORMED for secondary dex files includes the case when the dex file
247     * didn't need an update. That's because at the moment we don't get more than success/failure
248     * from installd.
249     *
250     * TODO(calin): Consider adding return codes to installd dexopt invocation (rather than
251     * throwing exceptions). Or maybe make a separate call to installd to get DexOptNeeded, though
252     * that seems wasteful.
253     */
254    public int dexOptSecondaryDexPath(ApplicationInfo info, String path,
255            PackageDexUsage.DexUseInfo dexUseInfo, DexoptOptions options) {
256        synchronized (mInstallLock) {
257            final long acquireTime = acquireWakeLockLI(info.uid);
258            try {
259                return dexOptSecondaryDexPathLI(info, path, dexUseInfo, options);
260            } finally {
261                releaseWakeLockLI(acquireTime);
262            }
263        }
264    }
265
266    @GuardedBy("mInstallLock")
267    private long acquireWakeLockLI(final int uid) {
268        // During boot the system doesn't need to instantiate and obtain a wake lock.
269        // PowerManager might not be ready, but that doesn't mean that we can't proceed with
270        // dexopt.
271        if (!mSystemReady) {
272            return -1;
273        }
274        mDexoptWakeLock.setWorkSource(new WorkSource(uid));
275        mDexoptWakeLock.acquire(WAKELOCK_TIMEOUT_MS);
276        return SystemClock.elapsedRealtime();
277    }
278
279    @GuardedBy("mInstallLock")
280    private void releaseWakeLockLI(final long acquireTime) {
281        if (acquireTime < 0) {
282            return;
283        }
284        try {
285            if (mDexoptWakeLock.isHeld()) {
286                mDexoptWakeLock.release();
287            }
288            final long duration = SystemClock.elapsedRealtime() - acquireTime;
289            if (duration >= WAKELOCK_TIMEOUT_MS) {
290                Slog.wtf(TAG, "WakeLock " + mDexoptWakeLock.getTag()
291                        + " time out. Operation took " + duration + " ms. Thread: "
292                        + Thread.currentThread().getName());
293            }
294        } catch (Exception e) {
295            Slog.wtf(TAG, "Error while releasing " + mDexoptWakeLock.getTag() + " lock", e);
296        }
297    }
298
299    @GuardedBy("mInstallLock")
300    private int dexOptSecondaryDexPathLI(ApplicationInfo info, String path,
301            PackageDexUsage.DexUseInfo dexUseInfo, DexoptOptions options) {
302        if (options.isDexoptOnlySharedDex() && !dexUseInfo.isUsedByOtherApps()) {
303            // We are asked to optimize only the dex files used by other apps and this is not
304            // on of them: skip it.
305            return DEX_OPT_SKIPPED;
306        }
307
308        String compilerFilter = getRealCompilerFilter(info, options.getCompilerFilter(),
309                dexUseInfo.isUsedByOtherApps());
310        // Get the dexopt flags after getRealCompilerFilter to make sure we get the correct flags.
311        // Secondary dex files are currently not compiled at boot.
312        int dexoptFlags = getDexFlags(info, compilerFilter, /* bootComplete */ true)
313                | DEXOPT_SECONDARY_DEX;
314        // Check the app storage and add the appropriate flags.
315        if (info.deviceProtectedDataDir != null &&
316                FileUtils.contains(info.deviceProtectedDataDir, path)) {
317            dexoptFlags |= DEXOPT_STORAGE_DE;
318        } else if (info.credentialProtectedDataDir != null &&
319                FileUtils.contains(info.credentialProtectedDataDir, path)) {
320            dexoptFlags |= DEXOPT_STORAGE_CE;
321        } else {
322            Slog.e(TAG, "Could not infer CE/DE storage for package " + info.packageName);
323            return DEX_OPT_FAILED;
324        }
325        Log.d(TAG, "Running dexopt on: " + path
326                + " pkg=" + info.packageName + " isa=" + dexUseInfo.getLoaderIsas()
327                + " dexoptFlags=" + printDexoptFlags(dexoptFlags)
328                + " target-filter=" + compilerFilter);
329
330        String classLoaderContext;
331        if (dexUseInfo.isUnknownClassLoaderContext() ||
332                dexUseInfo.isUnsupportedClassLoaderContext() ||
333                dexUseInfo.isVariableClassLoaderContext()) {
334            // If we have an unknown (not yet set), unsupported (custom class loaders), or a
335            // variable class loader chain, compile without a context and mark the oat file with
336            // SKIP_SHARED_LIBRARY_CHECK. Note that his might lead to a incorrect compilation.
337            // TODO(calin): We should just extract in this case.
338            classLoaderContext = SKIP_SHARED_LIBRARY_CHECK;
339        } else {
340            classLoaderContext = dexUseInfo.getClassLoaderContext();
341        }
342        try {
343            for (String isa : dexUseInfo.getLoaderIsas()) {
344                // Reuse the same dexopt path as for the primary apks. We don't need all the
345                // arguments as some (dexopNeeded and oatDir) will be computed by installd because
346                // system server cannot read untrusted app content.
347                // TODO(calin): maybe add a separate call.
348                mInstaller.dexopt(path, info.uid, info.packageName, isa, /*dexoptNeeded*/ 0,
349                        /*oatDir*/ null, dexoptFlags,
350                        compilerFilter, info.volumeUuid, classLoaderContext, info.seInfoUser,
351                        options.isDowngrade());
352            }
353
354            return DEX_OPT_PERFORMED;
355        } catch (InstallerException e) {
356            Slog.w(TAG, "Failed to dexopt", e);
357            return DEX_OPT_FAILED;
358        }
359    }
360
361    /**
362     * Adjust the given dexopt-needed value. Can be overridden to influence the decision to
363     * optimize or not (and in what way).
364     */
365    protected int adjustDexoptNeeded(int dexoptNeeded) {
366        return dexoptNeeded;
367    }
368
369    /**
370     * Adjust the given dexopt flags that will be passed to the installer.
371     */
372    protected int adjustDexoptFlags(int dexoptFlags) {
373        return dexoptFlags;
374    }
375
376    /**
377     * Dumps the dexopt state of the given package {@code pkg} to the given {@code PrintWriter}.
378     */
379    void dumpDexoptState(IndentingPrintWriter pw, PackageParser.Package pkg) {
380        final String[] instructionSets = getAppDexInstructionSets(pkg.applicationInfo);
381        final String[] dexCodeInstructionSets = getDexCodeInstructionSets(instructionSets);
382
383        final List<String> paths = pkg.getAllCodePathsExcludingResourceOnly();
384
385        for (String instructionSet : dexCodeInstructionSets) {
386             pw.println("Instruction Set: " + instructionSet);
387             pw.increaseIndent();
388             for (String path : paths) {
389                  String status = null;
390                  try {
391                      status = DexFile.getDexFileStatus(path, instructionSet);
392                  } catch (IOException ioe) {
393                      status = "[Exception]: " + ioe.getMessage();
394                  }
395                  pw.println("path: " + path);
396                  pw.println("status: " + status);
397             }
398             pw.decreaseIndent();
399        }
400    }
401
402    /**
403     * Returns the compiler filter that should be used to optimize the package code.
404     * The target filter will be updated if the package code is used by other apps
405     * or if it has the safe mode flag set.
406     */
407    private String getRealCompilerFilter(ApplicationInfo info, String targetCompilerFilter,
408            boolean isUsedByOtherApps) {
409        int flags = info.flags;
410        boolean vmSafeMode = (flags & ApplicationInfo.FLAG_VM_SAFE_MODE) != 0;
411        if (vmSafeMode) {
412            return getSafeModeCompilerFilter(targetCompilerFilter);
413        }
414
415        if (isProfileGuidedCompilerFilter(targetCompilerFilter) && isUsedByOtherApps) {
416            // If the dex files is used by other apps, we cannot use profile-guided compilation.
417            return getNonProfileGuidedCompilerFilter(targetCompilerFilter);
418        }
419
420        return targetCompilerFilter;
421    }
422
423    /**
424     * Computes the dex flags that needs to be pass to installd for the given package and compiler
425     * filter.
426     */
427    private int getDexFlags(PackageParser.Package pkg, String compilerFilter,
428            boolean bootComplete) {
429        return getDexFlags(pkg.applicationInfo, compilerFilter, bootComplete);
430    }
431
432    private int getDexFlags(ApplicationInfo info, String compilerFilter, boolean bootComplete) {
433        int flags = info.flags;
434        boolean debuggable = (flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0;
435        // Profile guide compiled oat files should not be public.
436        boolean isProfileGuidedFilter = isProfileGuidedCompilerFilter(compilerFilter);
437        boolean isPublic = !info.isForwardLocked() && !isProfileGuidedFilter;
438        int profileFlag = isProfileGuidedFilter ? DEXOPT_PROFILE_GUIDED : 0;
439        int dexFlags =
440                (isPublic ? DEXOPT_PUBLIC : 0)
441                | (debuggable ? DEXOPT_DEBUGGABLE : 0)
442                | profileFlag
443                | (bootComplete ? DEXOPT_BOOTCOMPLETE : 0);
444        return adjustDexoptFlags(dexFlags);
445    }
446
447    /**
448     * Assesses if there's a need to perform dexopt on {@code path} for the given
449     * configuration (isa, compiler filter, profile).
450     */
451    private int getDexoptNeeded(String path, String isa, String compilerFilter,
452            boolean newProfile, boolean downgrade) {
453        int dexoptNeeded;
454        try {
455            dexoptNeeded = DexFile.getDexOptNeeded(path, isa, compilerFilter, newProfile,
456                    downgrade);
457        } catch (IOException ioe) {
458            Slog.w(TAG, "IOException reading apk: " + path, ioe);
459            return DEX_OPT_FAILED;
460        }
461        return adjustDexoptNeeded(dexoptNeeded);
462    }
463
464    /**
465     * Checks if there is an update on the profile information of the {@code pkg}.
466     * If the compiler filter is not profile guided the method returns false.
467     *
468     * Note that this is a "destructive" operation with side effects. Under the hood the
469     * current profile and the reference profile will be merged and subsequent calls
470     * may return a different result.
471     */
472    private boolean isProfileUpdated(PackageParser.Package pkg, int uid, String compilerFilter) {
473        // Check if we are allowed to merge and if the compiler filter is profile guided.
474        if (!isProfileGuidedCompilerFilter(compilerFilter)) {
475            return false;
476        }
477        // Merge profiles. It returns whether or not there was an updated in the profile info.
478        try {
479            return mInstaller.mergeProfiles(uid, pkg.packageName);
480        } catch (InstallerException e) {
481            Slog.w(TAG, "Failed to merge profiles", e);
482        }
483        return false;
484    }
485
486    /**
487     * Creates oat dir for the specified package if needed and supported.
488     * In certain cases oat directory
489     * <strong>cannot</strong> be created:
490     * <ul>
491     *      <li>{@code pkg} is a system app, which is not updated.</li>
492     *      <li>Package location is not a directory, i.e. monolithic install.</li>
493     * </ul>
494     *
495     * @return Absolute path to the oat directory or null, if oat directory
496     * cannot be created.
497     */
498    @Nullable
499    private String createOatDirIfSupported(PackageParser.Package pkg, String dexInstructionSet) {
500        if (!pkg.canHaveOatDir()) {
501            return null;
502        }
503        File codePath = new File(pkg.codePath);
504        if (codePath.isDirectory()) {
505            // TODO(calin): why do we create this only if the codePath is a directory? (i.e for
506            //              cluster packages). It seems that the logic for the folder creation is
507            //              split between installd and here.
508            File oatDir = getOatDir(codePath);
509            try {
510                mInstaller.createOatDir(oatDir.getAbsolutePath(), dexInstructionSet);
511            } catch (InstallerException e) {
512                Slog.w(TAG, "Failed to create oat dir", e);
513                return null;
514            }
515            return oatDir.getAbsolutePath();
516        }
517        return null;
518    }
519
520    static File getOatDir(File codePath) {
521        return new File(codePath, OAT_DIR_NAME);
522    }
523
524    void systemReady() {
525        mSystemReady = true;
526    }
527
528    private String printDexoptFlags(int flags) {
529        ArrayList<String> flagsList = new ArrayList<>();
530
531        if ((flags & DEXOPT_BOOTCOMPLETE) == DEXOPT_BOOTCOMPLETE) {
532            flagsList.add("boot_complete");
533        }
534        if ((flags & DEXOPT_DEBUGGABLE) == DEXOPT_DEBUGGABLE) {
535            flagsList.add("debuggable");
536        }
537        if ((flags & DEXOPT_PROFILE_GUIDED) == DEXOPT_PROFILE_GUIDED) {
538            flagsList.add("profile_guided");
539        }
540        if ((flags & DEXOPT_PUBLIC) == DEXOPT_PUBLIC) {
541            flagsList.add("public");
542        }
543        if ((flags & DEXOPT_SECONDARY_DEX) == DEXOPT_SECONDARY_DEX) {
544            flagsList.add("secondary");
545        }
546        if ((flags & DEXOPT_FORCE) == DEXOPT_FORCE) {
547            flagsList.add("force");
548        }
549        if ((flags & DEXOPT_STORAGE_CE) == DEXOPT_STORAGE_CE) {
550            flagsList.add("storage_ce");
551        }
552        if ((flags & DEXOPT_STORAGE_DE) == DEXOPT_STORAGE_DE) {
553            flagsList.add("storage_de");
554        }
555
556        return String.join(",", flagsList);
557    }
558
559    /**
560     * A specialized PackageDexOptimizer that overrides already-installed checks, forcing a
561     * dexopt path.
562     */
563    public static class ForcedUpdatePackageDexOptimizer extends PackageDexOptimizer {
564
565        public ForcedUpdatePackageDexOptimizer(Installer installer, Object installLock,
566                Context context, String wakeLockTag) {
567            super(installer, installLock, context, wakeLockTag);
568        }
569
570        public ForcedUpdatePackageDexOptimizer(PackageDexOptimizer from) {
571            super(from);
572        }
573
574        @Override
575        protected int adjustDexoptNeeded(int dexoptNeeded) {
576            if (dexoptNeeded == DexFile.NO_DEXOPT_NEEDED) {
577                // Ensure compilation by pretending a compiler filter change on the
578                // apk/odex location (the reason for the '-'. A positive value means
579                // the 'oat' location).
580                return -DexFile.DEX2OAT_FOR_FILTER;
581            }
582            return dexoptNeeded;
583        }
584
585        @Override
586        protected int adjustDexoptFlags(int flags) {
587            // Add DEXOPT_FORCE flag to signal installd that it should force compilation
588            // and discard dexoptanalyzer result.
589            return flags | DEXOPT_FORCE;
590        }
591    }
592}
593