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/*
* Copyright (C) 2014 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.
*/
import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
public class Main {
public static void main(String[] args) throws Exception {
String name = System.getProperty("java.vm.name");
if (!"Dalvik".equals(name)) {
System.out.println("This test is not supported on " + name);
return;
}
testMethodTracing();
}
private static File createTempFile() throws Exception {
try {
return File.createTempFile("test", ".trace");
} catch (IOException e) {
System.setProperty("java.io.tmpdir", "/data/local/tmp");
try {
return File.createTempFile("test", ".trace");
} catch (IOException e2) {
System.setProperty("java.io.tmpdir", "/sdcard");
return File.createTempFile("test", ".trace");
}
}
}
private static void testMethodTracing() throws Exception {
File tempFile = createTempFile();
tempFile.deleteOnExit();
String tempFileName = tempFile.getPath();
if (VMDebug.getMethodTracingMode() != 0) {
VMDebug.stopMethodTracing();
}
System.out.println("Confirm enable/disable");
System.out.println("status=" + VMDebug.getMethodTracingMode());
VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0);
System.out.println("status=" + VMDebug.getMethodTracingMode());
VMDebug.stopMethodTracing();
System.out.println("status=" + VMDebug.getMethodTracingMode());
if (tempFile.length() == 0) {
System.out.println("ERROR: tracing output file is empty");
}
System.out.println("Confirm sampling");
VMDebug.startMethodTracing(tempFileName, 0, 0, true, 1000);
System.out.println("status=" + VMDebug.getMethodTracingMode());
VMDebug.stopMethodTracing();
System.out.println("status=" + VMDebug.getMethodTracingMode());
if (tempFile.length() == 0) {
System.out.println("ERROR: sample tracing output file is empty");
}
System.out.println("Test starting when already started");
VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0);
System.out.println("status=" + VMDebug.getMethodTracingMode());
VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0);
System.out.println("status=" + VMDebug.getMethodTracingMode());
System.out.println("Test stopping when already stopped");
VMDebug.stopMethodTracing();
System.out.println("status=" + VMDebug.getMethodTracingMode());
VMDebug.stopMethodTracing();
System.out.println("status=" + VMDebug.getMethodTracingMode());
System.out.println("Test tracing with empty filename");
try {
VMDebug.startMethodTracing("", 0, 0, false, 0);
System.out.println("Should have thrown an exception");
} catch (Exception e) {
System.out.println("Got expected exception");
}
System.out.println("Test tracing with bogus (< 1024 && != 0) filesize");
try {
VMDebug.startMethodTracing(tempFileName, 1000, 0, false, 0);
System.out.println("Should have thrown an exception");
} catch (Exception e) {
System.out.println("Got expected exception");
}
System.out.println("Test sampling with bogus (<= 0) interval");
try {
VMDebug.startMethodTracing(tempFileName, 0, 0, true, 0);
System.out.println("Should have thrown an exception");
} catch (Exception e) {
System.out.println("Got expected exception");
}
tempFile.delete();
}
private static class VMDebug {
private static final Method startMethodTracingMethod;
private static final Method stopMethodTracingMethod;
private static final Method getMethodTracingModeMethod;
static {
try {
Class c = Class.forName("dalvik.system.VMDebug");
startMethodTracingMethod = c.getDeclaredMethod("startMethodTracing", String.class,
Integer.TYPE, Integer.TYPE, Boolean.TYPE, Integer.TYPE);
stopMethodTracingMethod = c.getDeclaredMethod("stopMethodTracing");
getMethodTracingModeMethod = c.getDeclaredMethod("getMethodTracingMode");
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static void startMethodTracing(String filename, int bufferSize, int flags,
boolean samplingEnabled, int intervalUs) throws Exception {
startMethodTracingMethod.invoke(null, filename, bufferSize, flags, samplingEnabled,
intervalUs);
}
public static void stopMethodTracing() throws Exception {
stopMethodTracingMethod.invoke(null);
}
public static int getMethodTracingMode() throws Exception {
return (int) getMethodTracingModeMethod.invoke(null);
}
}
}
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