Log pending odsign metrics on start

/*

 * Copyright 2022 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 com.android.server.pm.dex;

import android.util.Slog;

import com.android.internal.art.ArtStatsLog;

import com.android.internal.os.BackgroundThread;

import libcore.io.IoUtils;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

/**

 * This class is responsible for reading metrics files generated by odsign and sending them to

 * statsd. odsign can't send the stats directly to statsd, because statsd can't run until after

 * odsign has completed. The code here is intended to run once per boot, since odsign runs at boot

 * time.

 */

public class OdsignStatsLogger {

    private static final String TAG = "OdsignStatsLogger";

    // These need to be kept in sync with system/security/ondevice-signing/StatsReporter.{h, cpp}.

    private static final String METRICS_FILE = "/data/misc/odsign/metrics/odsign-metrics.txt";

    private static final String COMPOS_METRIC_NAME = "comp_os_artifacts_check_record";

    /**

     * Arrange for stats to be uploaded in the background.

     */

    public static void triggerStatsWrite() {

        BackgroundThread.getExecutor().execute(OdsignStatsLogger::writeStats);

    }

    private static void writeStats() {

        try {

            String lines = IoUtils.readFileAsString(METRICS_FILE);

            // Delete the file now so we don't upload it more than once, and don't keep trying

            // to re-parse it if there is a problem.

            if (!new File(METRICS_FILE).delete()) {

                Slog.w(TAG, "Failed to delete metrics file");

            }

            // The format is simple - each line is a series of space separated tokens. The first is

            // the metric name and subsequent ones are the metric values. The logic here must be

            // kept in sync with system/security/ondevice-signing/StatsReporter.cpp.

            for (String line : lines.split("\n")) {

                String[] metrics = line.split(" ");

                if (metrics.length != 4 || !metrics[0].equals(COMPOS_METRIC_NAME)) {

                    Slog.w(TAG, "Malformed metrics file");

                    break;

                }

                boolean currentArtifactsOk = metrics[1].equals("1");

                boolean compOsPendingArtifactsExists = metrics[2].equals("1");

                boolean useCompOsGeneratedArtifacts = metrics[3].equals("1");

                ArtStatsLog.write(ArtStatsLog.EARLY_BOOT_COMP_OS_ARTIFACTS_CHECK_REPORTED,

                        currentArtifactsOk, compOsPendingArtifactsExists,

                        useCompOsGeneratedArtifacts);

            }

        } catch (FileNotFoundException e) {

            // This is normal and probably means no new metrics have been generated.

        } catch (IOException e) {

            Slog.w(TAG, "Reading metrics file failed", e);

        }

    }

}

import com.android.server.pm.PackageManagerService;

import com.android.server.pm.ShortcutService;

import com.android.server.pm.UserManagerService;

import com.android.server.pm.dex.OdsignStatsLogger;

import com.android.server.pm.dex.SystemServerDexLoadReporter;

import com.android.server.pm.verify.domain.DomainVerificationService;

import com.android.server.policy.AppOpsPolicy;

                setIncrementalServiceSystemReady(mIncrementalServiceHandle);

                t.traceEnd();

            }

            t.traceBegin("OdsignStatsLogger");

            try {

                OdsignStatsLogger.triggerStatsWrite();

            } catch (Throwable e) {

                reportWtf("Triggering OdsignStatsLogger", e);

            }

            t.traceEnd();

        }, t);

        t.traceBegin("StartSystemUI");