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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import com.oracle.testlibrary.jsr292.Helper;
import com.sun.management.HotSpotDiagnosticMXBean;
import java.lang.invoke.MethodHandle;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.lang.ref.Reference;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.List;
import java.util.function.Function;
import jdk.testlibrary.Utils;
import jdk.testlibrary.TimeLimitedRunner;
/**
* Lambda forms caching test case class. Contains all necessary test routines to
* test lambda forms caching in method handles returned by methods of
* MethodHandles class.
*
* @author kshefov
*/
public abstract class LambdaFormTestCase {
private static final double ITERATIONS_TO_CODE_CACHE_SIZE_RATIO
= 45 / (128.0 * 1024 * 1024);
private static final long TIMEOUT = Helper.IS_THOROUGH ? 0L : (long) (Utils.adjustTimeout(Utils.DEFAULT_TEST_TIMEOUT) * 0.9);
/**
* Reflection link to {@code j.l.i.MethodHandle.internalForm} method. It is
* used to get a lambda form from a method handle.
*/
protected final static Method INTERNAL_FORM;
protected final static Field DEBUG_NAME;
protected final static Field REF_FIELD;
private static final List<GarbageCollectorMXBean> gcInfo;
private static long gcCount() {
return gcInfo.stream().mapToLong(GarbageCollectorMXBean::getCollectionCount).sum();
}
static {
try {
INTERNAL_FORM = MethodHandle.class.getDeclaredMethod("internalForm");
INTERNAL_FORM.setAccessible(true);
DEBUG_NAME = Class.forName("java.lang.invoke.LambdaForm").getDeclaredField("debugName");
DEBUG_NAME.setAccessible(true);
REF_FIELD = Reference.class.getDeclaredField("referent");
REF_FIELD.setAccessible(true);
} catch (Exception ex) {
throw new Error("Unexpected exception: ", ex);
}
gcInfo = ManagementFactory.getGarbageCollectorMXBeans();
if (gcInfo.size() == 0) {
throw new Error("No GarbageCollectorMXBeans found.");
}
}
private final TestMethods testMethod;
private static long totalIterations = 0L;
private static long doneIterations = 0L;
private static boolean passed = true;
private static int testCounter = 0;
private static int failCounter = 0;
private long gcCountAtStart;
/**
* Test case constructor. Generates test cases with random method types for
* given methods form {@code j.l.i.MethodHandles} class.
*
* @param testMethod A method from {@code j.l.i.MethodHandles} class which
* returns a {@code j.l.i.MethodHandle}.
*/
protected LambdaFormTestCase(TestMethods testMethod) {
this.testMethod = testMethod;
this.gcCountAtStart = gcCount();
}
public TestMethods getTestMethod() {
return testMethod;
}
protected boolean noGCHappened() {
return gcCount() == gcCountAtStart;
}
/**
* Routine that executes a test case.
*/
public abstract void doTest();
/**
* Runs a number of test cases defined by the size of testCases list.
*
* @param ctor constructor of LambdaFormCachingTest or its child classes
* object.
* @param testMethods list of test methods
*/
public static void runTests(Function<TestMethods, LambdaFormTestCase> ctor, Collection<TestMethods> testMethods) {
long testCaseNum = testMethods.size();
totalIterations = Math.max(1, Helper.TEST_LIMIT / testCaseNum);
System.out.printf("Number of iterations according to -DtestLimit is %d (%d cases)%n",
totalIterations, totalIterations * testCaseNum);
HotSpotDiagnosticMXBean hsDiagBean = ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);
long codeCacheSize = Long.parseLong(
hsDiagBean.getVMOption("ReservedCodeCacheSize").getValue());
System.out.printf("Code Cache Size is %d bytes%n", codeCacheSize);
long iterationsByCodeCacheSize = (long) (codeCacheSize
* ITERATIONS_TO_CODE_CACHE_SIZE_RATIO);
System.out.printf("Number of iterations limited by code cache size is %d (%d cases)%n",
iterationsByCodeCacheSize, iterationsByCodeCacheSize * testCaseNum);
if (totalIterations > iterationsByCodeCacheSize) {
totalIterations = iterationsByCodeCacheSize;
}
System.out.printf("Number of iterations is set to %d (%d cases)%n",
totalIterations, totalIterations * testCaseNum);
System.out.flush();
TimeLimitedRunner runner = new TimeLimitedRunner(TIMEOUT, 4.0d,
() -> {
if (doneIterations >= totalIterations) {
return false;
}
System.err.println(String.format("Iteration %d:", doneIterations));
for (TestMethods testMethod : testMethods) {
LambdaFormTestCase testCase = ctor.apply(testMethod);
try {
System.err.printf("Tested LF caching feature with MethodHandles.%s method.%n",
testCase.getTestMethod().name);
testCase.doTest();
System.err.println("PASSED");
} catch (OutOfMemoryError e) {
// Don't swallow OOME so a heap dump can be created.
System.err.println("FAILED");
throw e;
} catch (Throwable t) {
t.printStackTrace();
System.err.println("FAILED");
passed = false;
failCounter++;
}
testCounter++;
}
doneIterations++;
return true;
});
try {
runner.call();
} catch (Throwable t) {
t.printStackTrace();
System.err.println("FAILED");
throw new Error("Unexpected error!");
}
if (!passed) {
throw new Error(String.format("%d of %d test cases FAILED! %n"
+ "Rerun the test with the same \"-Dseed=\" option as in the log file!",
failCounter, testCounter));
} else {
System.err.println(String.format("All %d test cases PASSED!", testCounter));
}
}
}
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