android-13.0.0_r83/s

/*
 * Copyright (C) 2008 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.os.cts;

import static com.android.compatibility.common.util.SystemUtil.runWithShellPermissionIdentity;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.pm.PackageManager;
import android.os.IBinder;
import android.os.Process;
import android.util.Log;

import androidx.test.InstrumentationRegistry;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;


/**
 * CTS for {@link android.os.Process}.
 *
 * We have more test in cts/tests/process/ too.
 */
@RunWith(JUnit4.class)
public class ProcessTest {

    public static final int THREAD_PRIORITY_HIGHEST = -20;
    private static final String NONE_EXISITENT_NAME = "abcdefcg";
    private static final String WRONG_CACHE_NAME = "cache_abcdefg";
    private static final String PROCESS_SHELL= "shell";
    private static final String PROCESS_CACHE= "cache";
    private static final String REMOTE_SERVICE = "android.app.REMOTESERVICE";
    private static final int APP_UID = 10001;
    private static final int SANDBOX_SDK_UID = 20001;
    private static final String TAG = "ProcessTest";
    private ISecondary mSecondaryService = null;
    private Intent mIntent;
    private Object mSync;
    private boolean mHasConnected;
    private boolean mHasDisconnected;
    private ServiceConnection mSecondaryConnection;
    private Context mContext;

    @Before
    public void setUp() throws Exception {
        mContext = InstrumentationRegistry.getContext();
        mSync = new Object();
        mSecondaryConnection = new ServiceConnection() {
            public void onServiceConnected(ComponentName className,
                    IBinder service) {
                // Connecting to a secondary interface is the same as any
                // other interface.
                android.util.Log.d(TAG, "connected");
                mSecondaryService = ISecondary.Stub.asInterface(service);
                synchronized (mSync) {
                    mHasConnected = true;
                    mSync.notify();
                }
            }
            public void onServiceDisconnected(ComponentName className) {
                Log.d(TAG, "disconnected");
                mSecondaryService = null;
                synchronized (mSync) {
                    mHasDisconnected = true;
                    mSync.notify();
                }
            }
        };
        mIntent = new Intent(REMOTE_SERVICE);
        mIntent.setPackage(mContext.getPackageName());
        mContext.startService(mIntent);

        Intent secondaryIntent = new Intent(ISecondary.class.getName());
        secondaryIntent.setPackage(mContext.getPackageName());
        mContext.bindService(secondaryIntent, mSecondaryConnection,
                Context.BIND_AUTO_CREATE);
        synchronized (mSync) {
            if (!mHasConnected) {
                try {
                    mSync.wait();
                } catch (InterruptedException e) {
                }
            }
        }
    }

    @After
    public void tearDown() throws Exception {
        if (mIntent != null) {
            mContext.stopService(mIntent);
        }
        if (mSecondaryConnection != null) {
            mContext.unbindService(mSecondaryConnection);
        }
    }

    @Test
    public void testMiscMethods() {
        /*
         * Test setThreadPriority(int) and setThreadPriority(int, int)
         * 1.Set the priority of the calling thread, based on Linux priorities level,
         * from -20 for highest scheduling priority to 19 for lowest scheduling priority.
         * 2.Throws IllegalArgumentException if tid does not exist.
         */
        int myTid = Process.myTid();

        int priority = Process.getThreadPriority(myTid);
        assertTrue(priority >= THREAD_PRIORITY_HIGHEST
                && priority <= Process.THREAD_PRIORITY_LOWEST);

        Process.setThreadPriority(Process.THREAD_PRIORITY_AUDIO);
        assertEquals(Process.THREAD_PRIORITY_AUDIO, Process.getThreadPriority(myTid));

        Process.setThreadPriority(myTid, Process.THREAD_PRIORITY_LOWEST);
        assertEquals(Process.THREAD_PRIORITY_LOWEST, Process.getThreadPriority(myTid));

        Process.setThreadPriority(myTid, THREAD_PRIORITY_HIGHEST);
        assertEquals(THREAD_PRIORITY_HIGHEST, Process.getThreadPriority(myTid));

        int invalidPriority = THREAD_PRIORITY_HIGHEST - 1;
        Process.setThreadPriority(myTid, invalidPriority);
        assertEquals(THREAD_PRIORITY_HIGHEST, Process.getThreadPriority(myTid));

        try {
            Process.setThreadPriority(-1, Process.THREAD_PRIORITY_DEFAULT);
            fail("Should throw IllegalArgumentException");
        } catch (IllegalArgumentException e) {
            // expect
        } // Hard to address logic of throws SecurityException

        /*
         * Returns the UID assigned to a particular user name, or -1 if there is
         * none.  If the given string consists of only numbers, it is converted
         * directly to a uid.
         */
        assertTrue(Process.getUidForName(PROCESS_SHELL) > 0);
        assertEquals(-1, Process.getUidForName(NONE_EXISITENT_NAME));
        assertEquals(0, Process.getUidForName("0"));

        /*
         * Returns the GID assigned to a particular user name, or -1 if there is
         * none.  If the given string consists of only numbers, it is converted
         * directly to a gid.
         */
        assertTrue(Process.getGidForName(PROCESS_CACHE) > 0);
        assertEquals(-1, Process.getGidForName(WRONG_CACHE_NAME));
        assertEquals(0, Process.getGidForName("0"));

        assertTrue(Process.myUid() >= 0);

        assertNotEquals(null, Process.getExclusiveCores());
    }

    /**
     * Test point of killProcess(int)
     * Only the process running the caller's packages/application
     * and any additional processes created by that app be able to kill each other's processes.
     */
    @Test
    public void testKillProcess() throws Exception {
        long time = 0;
        int servicePid = 0;
        try {
            servicePid = mSecondaryService.getPid();
            time = mSecondaryService.getElapsedCpuTime();
        } finally {
            mContext.stopService(mIntent);
            mIntent = null;
        }

        assertTrue(time > 0);
        assertTrue(servicePid != Process.myPid());

        Process.killProcess(servicePid);
        synchronized (mSync) {
            if (!mHasDisconnected) {
                try {
                    mSync.wait();
                } catch (InterruptedException e) {
                }
            }
        }
        assertTrue(mHasDisconnected);
    }

    /**
     * Test myPid() point.
     * Returns the identifier of this process, which can be used with
     * {@link #killProcess} and {@link #sendSignal}.
     * Test sendSignal(int) point.
     * Send a signal to the given process.
     */
    @Test
    public void testSendSignal() throws Exception {
        int servicePid = 0;
        try {
            servicePid = mSecondaryService.getPid();
        } finally {
            mContext.stopService(mIntent);
            mIntent = null;
        }
        assertTrue(servicePid != 0);
        assertTrue(Process.myPid() != servicePid);
        Process.sendSignal(servicePid, Process.SIGNAL_KILL);
        synchronized (mSync) {
            if (!mHasDisconnected) {
                try {
                    mSync.wait();
                } catch (InterruptedException e) {
                }
            }
        }
        assertTrue(mHasDisconnected);
    }

    /**
     * Tests APIs related to sdk sandbox uids.
     */
    @Test
    public void testSdkSandboxUids() {
        assertEquals(SANDBOX_SDK_UID, Process.toSdkSandboxUid(APP_UID));
        assertEquals(APP_UID, Process.getAppUidForSdkSandboxUid(SANDBOX_SDK_UID));

        assertFalse(Process.isSdkSandboxUid(APP_UID));
        assertTrue(Process.isSdkSandboxUid(SANDBOX_SDK_UID));

        assertFalse(Process.isSdkSandbox());
    }

    /**
     * Tests that the reserved UID is not taken by an actual package.
     */
    @Test
    public void testReservedVirtualUid() {
        PackageManager pm = mContext.getPackageManager();
        final String name = pm.getNameForUid(Process.SDK_SANDBOX_VIRTUAL_UID);
        assertNull(name);

        // PackageManager#getPackagesForUid requires android.permission.INTERACT_ACROSS_USERS for
        // cross-user calls.
        runWithShellPermissionIdentity(() -> {
            final String[] packages = pm.getPackagesForUid(Process.SDK_SANDBOX_VIRTUAL_UID);
            assertNull(packages);
        });
    }
}