/*
* 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 .
*/
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.IOException;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
interface Itf {
public int someMethod();
public default int someDefaultMethod() { return 42 ; }
}
public class Main implements Itf {
private static final String TEMP_FILE_NAME_PREFIX = "test" ;
private static final String TEMP_FILE_NAME_SUFFIX = ".trace" ;
private static final int WALL_CLOCK_FLAG = 0 x010;
private static final int TRACE_OUTPUT_V2_FLAG = 0 b010;
private static final int STREAMING_DUAL_CLOCK_VERSION = 1 ;
private static final int STREAMING_WALL_CLOCK_VERSION = 1 ;
private static File file;
public int someMethod() {
return 3 ;
}
static class MyProxy implements InvocationHandler {
private Object obj;
public static Object newInstance(Object obj) {
return java.lang.reflect.Proxy.newProxyInstance(
obj.getClass().getClassLoader(),
obj.getClass().getInterfaces(),
new MyProxy(obj));
}
private MyProxy(Object obj) {
this .obj = obj;
}
public Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
return m.invoke(obj, args);
}
}
public static void main(String[] args) throws Exception {
System.loadLibrary(args[0 ]);
String name = System.getProperty("java.vm.name" );
if (!"Dalvik" .equals(name)) {
System.out.println("This test is not supported on " + name);
return ;
}
ensureJitCompiled(Main.class , "$noinline$doSomeWorkJIT" );
System.out.println("***** streaming test - dual clock *******" );
testTracing(/* streaming=*/true, /* flags= */ 0, /* test_overflow= */ false);
System.out.println("***** streaming test - wall clock *******" );
testTracing(/* streaming=*/true, /* flags= */ WALL_CLOCK_FLAG, /* test_overflow= */ false);
System.out.println("***** non-streaming test - dual clock *******" );
testTracing(/* streaming=*/false, /* flags= */ 0, /* test_overflow= */ false);
System.out.println("***** non-streaming test - wall clock *******" );
testTracing(/* streaming=*/false, /* flags= */ WALL_CLOCK_FLAG, /* test_overflow= */ false);
System.out.println("***** non-streaming test - wall clock - buffer overflow *******" );
testTracing(/* streaming=*/false, /* flags= */ WALL_CLOCK_FLAG, /* test_overflow= */ true);
}
public static void testTracing(boolean streaming, int flags, boolean test_overflow) throws Exception {
Main m = new Main();
final long num_iterations = test_overflow? (32 * 1024 ) : 20 ;
Thread t = new Thread (() -> {
try {
file = createTempFile();
FileOutputStream out_file = new FileOutputStream(file);
VMDebug.startMethodTracingV2(
file.getPath(), out_file.getFD(), 0 , flags, false , 0 , streaming);
Main m1 = new Main();
m1.$noinline$doSomeWork();
// Use some proxy methods
Itf foo = (Itf) MyProxy.newInstance(new Main());
foo.someMethod();
foo.someDefaultMethod();
// Call JITed code multiple times to flush out any issues with timestamps.
for (long i = 0 ; i < num_iterations; i++) {
m.$noinline$doSomeWorkJIT();
}
VMDebug.$noinline$stopMethodTracing();
out_file.close();
if (test_overflow) {
dumpTrace(file.getAbsolutePath(), "TestThread2246" , "stopMethodTracing" );
} else {
dumpTrace(file.getAbsolutePath(), "TestThread2246" , null );
}
file.delete ();
} catch (Exception e) {
System.out.println("Exception in thread " + e);
e.printStackTrace();
} finally {
file.delete ();
}
}, "TestThread2246" );
try {
if (VMDebug.getMethodTracingMode() != 0 ) {
VMDebug.$noinline$stopMethodTracing();
}
t.start();
t.join();
file = createTempFile();
FileOutputStream main_out_file = new FileOutputStream(file);
VMDebug.startMethodTracingV2(
file.getPath(), main_out_file.getFD(), 0 , flags, false , 0 , streaming);
m.$noinline$doSomeWork();
// Call JITed code multiple times to flush out any issues with timestamps.
for (int i = 0 ; i < num_iterations; i++) {
m.$noinline$doSomeWorkJIT();
}
m.doSomeWorkThrow();
VMDebug.$noinline$stopMethodTracing();
main_out_file.close();
if (test_overflow) {
dumpTrace(file.getAbsolutePath(), "main" , "stopMethodTracing" );
} else {
dumpTrace(file.getAbsolutePath(), "main" , null );
}
file.delete ();
} finally {
file.delete ();
}
}
private static File createTempFile() throws Exception {
try {
return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX);
} catch (IOException e) {
System.setProperty("java.io.tmpdir" , "/data/local/tmp" );
try {
return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX);
} catch (IOException e2) {
System.setProperty("java.io.tmpdir" , "/sdcard" );
return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX);
}
}
}
public void callOuterFunction() {
callLeafFunction();
}
public void callLeafFunction() {}
public void $noinline$doSomeWork() {
callOuterFunction();
callLeafFunction();
}
public void $noinline$doSomeWorkJIT() {
callOuterFunction();
callLeafFunction();
}
public void callThrowFunction() throws Exception {
throw new Exception("test" );
}
public void doSomeWorkThrow() {
try {
callThrowFunction();
} catch (Exception e) {
}
}
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 ,
FileDescriptor.class , Integer.TYPE, Integer.TYPE, Boolean .TYPE,
Integer.TYPE, Boolean .TYPE);
stopMethodTracingMethod = c.getDeclaredMethod("stopMethodTracing" );
getMethodTracingModeMethod = c.getDeclaredMethod("getMethodTracingMode" );
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static void startMethodTracingV2(String filename, FileDescriptor fd, int bufferSize,
int flags, boolean samplingEnabled, int intervalUs, boolean streaming)
throws Exception {
startMethodTracingMethod.invoke(null , filename, fd, bufferSize,
flags | TRACE_OUTPUT_V2_FLAG, samplingEnabled, intervalUs, streaming);
}
public static void $noinline$stopMethodTracing() throws Exception {
stopMethodTracingMethod.invoke(null );
}
public static int getMethodTracingMode() throws Exception {
return (int ) getMethodTracingModeMethod.invoke(null );
}
}
private static native void ensureJitCompiled(Class <?> cls, String methodName);
private static native void dumpTrace(String fileName, String threadName, String methodNameFilter);
}
Messung V0.5 in Prozent C=91 H=95 G=92
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-06-29)
¤
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