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/*
* Copyright (C) 2015 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.traceur;
import android.os.Build;
import android.util.Log;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.Locale;
import java.util.Collection;
import java.util.TreeMap;
/**
* Utility functions for tracing.
* Will call atrace or perfetto depending on the setting.
*/
public class TraceUtils {
static final String TAG = "Traceur";
public static final String TRACE_DIRECTORY = "/data/local/traces/";
// To change Traceur to use atrace to collect traces,
// change mTraceEngine to point to AtraceUtils().
private static TraceEngine mTraceEngine = new PerfettoUtils();
private static final Runtime RUNTIME = Runtime.getRuntime();
public interface TraceEngine {
public String getName();
public String getOutputExtension();
public boolean traceStart(Collection<String> tags, int bufferSizeKb, boolean apps,
boolean longTrace, int maxLongTraceSizeMb, int maxLongTraceDurationMinutes);
public void traceStop();
public boolean traceDump(File outFile);
public boolean isTracingOn();
}
public static String currentTraceEngine() {
return mTraceEngine.getName();
}
public static boolean traceStart(Collection<String> tags, int bufferSizeKb, boolean apps,
boolean longTrace, int maxLongTraceSizeMb, int maxLongTraceDurationMinutes) {
return mTraceEngine.traceStart(tags, bufferSizeKb, apps,
longTrace, maxLongTraceSizeMb, maxLongTraceDurationMinutes);
}
public static void traceStop() {
mTraceEngine.traceStop();
}
public static boolean traceDump(File outFile) {
return mTraceEngine.traceDump(outFile);
}
public static boolean isTracingOn() {
return mTraceEngine.isTracingOn();
}
public static TreeMap<String, String> listCategories() {
return AtraceUtils.atraceListCategories();
}
public static void clearSavedTraces() {
String cmd = "rm -f " + TRACE_DIRECTORY + "trace-*.*trace";
Log.v(TAG, "Clearing trace directory: " + cmd);
try {
Process rm = exec(cmd);
if (rm.waitFor() != 0) {
Log.e(TAG, "clearSavedTraces failed with: " + rm.exitValue());
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static Process exec(String cmd) throws IOException {
return exec(cmd, null);
}
public static Process exec(String cmd, String tmpdir) throws IOException {
String[] cmdarray = {"sh", "-c", cmd};
String[] envp = {"TMPDIR=" + tmpdir};
envp = tmpdir == null ? null : envp;
Log.v(TAG, "exec: " + Arrays.toString(envp) + " " + Arrays.toString(cmdarray));
return RUNTIME.exec(cmdarray, envp);
}
public static String getOutputFilename() {
String format = "yyyy-MM-dd-HH-mm-ss";
String now = new SimpleDateFormat(format, Locale.US).format(new Date());
return String.format("trace-%s-%s-%s.%s", Build.BOARD, Build.ID, now,
mTraceEngine.getOutputExtension());
}
public static File getOutputFile(String filename) {
return new File(TraceUtils.TRACE_DIRECTORY, filename);
}
}
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