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Commit 40bfa5ab authored by Alexei Nicoara's avatar Alexei Nicoara Committed by Automerger Merge Worker
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Merge "Utils required for CrashRecovery module" into main am: d9884e39 am: fe5f5ce9 

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2996156



Change-Id: I832501a2df952de6eed5007c60479a01de758b5d
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents 52254f34 fe5f5ce9

packages/CrashRecovery/services/java/com/android/server/PackageWatchdog.java

+3 −3
Original line number Diff line number Diff line
@@ -38,15 +38,15 @@ import android.text.TextUtils; 
import android.util.ArrayMap;

import android.util.ArraySet;

import android.util.AtomicFile;

import android.util.BackgroundThread;

import android.util.LongArrayQueue;

import android.util.Slog;

import android.util.Xml;

import android.utils.BackgroundThread;

import android.utils.LongArrayQueue;

import android.utils.XmlUtils;



import com.android.internal.annotations.GuardedBy;

import com.android.internal.annotations.VisibleForTesting;

import com.android.internal.util.IndentingPrintWriter;

import com.android.internal.util.XmlUtils;

import com.android.modules.utils.TypedXmlPullParser;

import com.android.modules.utils.TypedXmlSerializer;

packages/CrashRecovery/services/java/com/android/server/RescueParty.java

+2 −2
Original line number Diff line number Diff line
@@ -29,7 +29,6 @@ import android.content.pm.PackageManager; 
import android.content.pm.VersionedPackage;

import android.os.Build;

import android.os.Environment;

import android.os.FileUtils;

import android.os.PowerManager;

import android.os.RecoverySystem;

import android.os.SystemClock;
@@ -42,10 +41,11 @@ import android.text.TextUtils; 
import android.util.ArraySet;

import android.util.Log;

import android.util.Slog;

import android.utils.ArrayUtils;

import android.utils.FileUtils;



import com.android.internal.annotations.GuardedBy;

import com.android.internal.annotations.VisibleForTesting;

import com.android.internal.util.ArrayUtils;

import com.android.server.PackageWatchdog.FailureReasons;

import com.android.server.PackageWatchdog.PackageHealthObserver;

import com.android.server.PackageWatchdog.PackageHealthObserverImpact;

packages/CrashRecovery/services/java/com/android/utils/ArrayUtils.java

0 → 100644
+115 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2024 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



package android.utils;



import android.annotation.NonNull;

import android.annotation.Nullable;



import java.io.File;

import java.util.List;

import java.util.Objects;



/**

 * Copied over from frameworks/base/core/java/com/android/internal/util/ArrayUtils.java

 *

 * @hide

 */

public class ArrayUtils {

    private ArrayUtils() { /* cannot be instantiated */ }

    public static final File[] EMPTY_FILE = new File[0];





    /**

     * Return first index of {@code value} in {@code array}, or {@code -1} if

     * not found.

     */

    public static <T> int indexOf(@Nullable T[] array, T value) {

        if (array == null) return -1;

        for (int i = 0; i < array.length; i++) {

            if (Objects.equals(array[i], value)) return i;

        }

        return -1;

    }



    /** @hide */

    public static @NonNull File[] defeatNullable(@Nullable File[] val) {

        return (val != null) ? val : EMPTY_FILE;

    }



    /**

     * Checks if given array is null or has zero elements.

     */

    public static boolean isEmpty(@Nullable int[] array) {

        return array == null || array.length == 0;

    }



    /**

     * True if the byte array is null or has length 0.

     */

    public static boolean isEmpty(@Nullable byte[] array) {

        return array == null || array.length == 0;

    }



    /**

     * Converts from List of bytes to byte array

     * @param list

     * @return byte[]

     */

    public static byte[] toPrimitive(List<byte[]> list) {

        if (list.size() == 0) {

            return new byte[0];

        }

        int byteLen = list.get(0).length;

        byte[] array = new byte[list.size() * byteLen];

        for (int i = 0; i < list.size(); i++) {

            for (int j = 0; j < list.get(i).length; j++) {

                array[i * byteLen + j] = list.get(i)[j];

            }

        }

        return array;

    }



    /**

     * Adds value to given array if not already present, providing set-like

     * behavior.

     */

    public static @NonNull int[] appendInt(@Nullable int[] cur, int val) {

        return appendInt(cur, val, false);

    }



    /**

     * Adds value to given array.

     */

    public static @NonNull int[] appendInt(@Nullable int[] cur, int val,

            boolean allowDuplicates) {

        if (cur == null) {

            return new int[] { val };

        }

        final int n = cur.length;

        if (!allowDuplicates) {

            for (int i = 0; i < n; i++) {

                if (cur[i] == val) {

                    return cur;

                }

            }

        }

        int[] ret = new int[n + 1];

        System.arraycopy(cur, 0, ret, 0, n);

        ret[n] = val;

        return ret;

    }

}

packages/CrashRecovery/services/java/com/android/util/BackgroundThread.java→packages/CrashRecovery/services/java/com/android/utils/BackgroundThread.java

+1 −1
Original line number Diff line number Diff line
@@ -14,7 +14,7 @@ 
 * limitations under the License.

 */



package android.util;

package android.utils;



import android.annotation.NonNull;

import android.os.Handler;

packages/CrashRecovery/services/java/com/android/utils/FileUtils.java

0 → 100644
+128 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2024 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



package android.utils;



import android.annotation.NonNull;

import android.annotation.Nullable;



import java.io.BufferedInputStream;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;



/**

 * Bits and pieces copied from hidden API of android.os.FileUtils.

 *

 * @hide

 */

public class FileUtils {

    /**

     * Read a text file into a String, optionally limiting the length.

     *

     * @param file     to read (will not seek, so things like /proc files are OK)

     * @param max      length (positive for head, negative of tail, 0 for no limit)

     * @param ellipsis to add of the file was truncated (can be null)

     * @return the contents of the file, possibly truncated

     * @throws IOException if something goes wrong reading the file

     * @hide

     */

    public static @Nullable String readTextFile(@Nullable File file, @Nullable int max,

            @Nullable String ellipsis) throws IOException {

        InputStream input = new FileInputStream(file);

        // wrapping a BufferedInputStream around it because when reading /proc with unbuffered

        // input stream, bytes read not equal to buffer size is not necessarily the correct

        // indication for EOF; but it is true for BufferedInputStream due to its implementation.

        BufferedInputStream bis = new BufferedInputStream(input);

        try {

            long size = file.length();

            if (max > 0 || (size > 0 && max == 0)) {  // "head" mode: read the first N bytes

                if (size > 0 && (max == 0 || size < max)) max = (int) size;

                byte[] data = new byte[max + 1];

                int length = bis.read(data);

                if (length <= 0) return "";

                if (length <= max) return new String(data, 0, length);

                if (ellipsis == null) return new String(data, 0, max);

                return new String(data, 0, max) + ellipsis;

            } else if (max < 0) {  // "tail" mode: keep the last N

                int len;

                boolean rolled = false;

                byte[] last = null;

                byte[] data = null;

                do {

                    if (last != null) rolled = true;

                    byte[] tmp = last;

                    last = data;

                    data = tmp;

                    if (data == null) data = new byte[-max];

                    len = bis.read(data);

                } while (len == data.length);



                if (last == null && len <= 0) return "";

                if (last == null) return new String(data, 0, len);

                if (len > 0) {

                    rolled = true;

                    System.arraycopy(last, len, last, 0, last.length - len);

                    System.arraycopy(data, 0, last, last.length - len, len);

                }

                if (ellipsis == null || !rolled) return new String(last);

                return ellipsis + new String(last);

            } else {  // "cat" mode: size unknown, read it all in streaming fashion

                ByteArrayOutputStream contents = new ByteArrayOutputStream();

                int len;

                byte[] data = new byte[1024];

                do {

                    len = bis.read(data);

                    if (len > 0) contents.write(data, 0, len);

                } while (len == data.length);

                return contents.toString();

            }

        } finally {

            bis.close();

            input.close();

        }

    }



    /**

     * Perform an fsync on the given FileOutputStream. The stream at this

     * point must be flushed but not yet closed.

     *

     * @hide

     */

    public static boolean sync(FileOutputStream stream) {

        try {

            if (stream != null) {

                stream.getFD().sync();

            }

            return true;

        } catch (IOException e) {

        }

        return false;

    }



    /**

     * List the files in the directory or return empty file.

     *

     * @hide

     */

    public static @NonNull File[] listFilesOrEmpty(@Nullable File dir) {

        return (dir != null) ? ArrayUtils.defeatNullable(dir.listFiles())

            : ArrayUtils.EMPTY_FILE;

    }

}