543 lines
19 KiB
Java
543 lines
19 KiB
Java
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/*
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package test.java.lang.invoke.MethodHandles;
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import com.oracle.testlibrary.jsr292.Helper;
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import jdk.testlibrary.Asserts;
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.MethodType;
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import java.lang.reflect.Array;
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import java.util.*;
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import java.util.function.BiFunction;
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import java.util.function.Function;
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import java.util.function.Supplier;
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/* @test
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* @library /lib/testlibrary/jsr292 /lib/testlibrary/
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* @compile CatchExceptionTest.java
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* @run main/othervm -esa test.java.lang.invoke.MethodHandles.CatchExceptionTest
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*/
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public class CatchExceptionTest {
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private static final List<Class<?>> ARGS_CLASSES;
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protected static final int MAX_ARITY = Helper.MAX_ARITY - 1;
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static {
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Class<?> classes[] = {
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Object.class,
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long.class,
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int.class,
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byte.class,
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Integer[].class,
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double[].class,
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String.class,
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};
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List<Class<?>> list = new ArrayList<>(MAX_ARITY);
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for (int i = 0; i < MAX_ARITY; ++i) {
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list.add(classes[Helper.RNG.nextInt(classes.length)]);
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}
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ARGS_CLASSES = Collections.unmodifiableList(list);
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}
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private final TestCase testCase;
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private final int nargs;
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private final int argsCount;
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private final MethodHandle catcher;
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private int dropped;
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private MethodHandle thrower;
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public CatchExceptionTest(TestCase testCase, final boolean isVararg, final int argsCount,
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final int catchDrops) {
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this.testCase = testCase;
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this.dropped = catchDrops;
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if (Helper.IS_VERBOSE) {
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System.out.printf("CatchException::CatchException(%s, isVararg=%b " +
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"argsCount=%d catchDrops=%d)%n",
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testCase, isVararg, argsCount, catchDrops
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);
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}
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MethodHandle thrower = testCase.thrower;
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int throwerLen = thrower.type().parameterCount();
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List<Class<?>> classes;
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int extra = Math.max(0, argsCount - throwerLen);
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classes = getThrowerParams(isVararg, extra);
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this.argsCount = throwerLen + classes.size();
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thrower = Helper.addTrailingArgs(thrower, this.argsCount, classes);
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if (isVararg && argsCount > throwerLen) {
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MethodType mt = thrower.type();
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Class<?> lastParam = mt.parameterType(mt.parameterCount() - 1);
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thrower = thrower.asVarargsCollector(lastParam);
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}
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this.thrower = thrower;
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this.dropped = Math.min(this.argsCount, catchDrops);
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catcher = testCase.getCatcher(getCatcherParams());
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nargs = Math.max(2, this.argsCount);
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}
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public static void main(String[] args) throws Throwable {
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for (CatchExceptionTest test : TestFactory.MANDATORY_TEST_CASES) {
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test.runTest();
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}
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TestFactory factory = new TestFactory();
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CatchExceptionTest test;
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while ((test = factory.nextTest()) != null ) {
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test.runTest();
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}
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}
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private List<Class<?>> getThrowerParams(boolean isVararg, int argsCount) {
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boolean unmodifiable = true;
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List<Class<?>> classes;
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classes = ARGS_CLASSES.subList(0,
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Math.min(argsCount, (MAX_ARITY / 2) - 1));
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int extra = 0;
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if (argsCount >= MAX_ARITY / 2) {
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classes = new ArrayList<>(classes);
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unmodifiable = false;
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extra = (int) classes.stream().filter(Helper::isDoubleCost).count();
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int i = classes.size();
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while (classes.size() + extra < argsCount) {
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Class<?> aClass = ARGS_CLASSES.get(i);
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if (Helper.isDoubleCost(aClass)) {
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++extra;
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if (classes.size() + extra >= argsCount) {
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break;
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}
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}
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classes.add(aClass);
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}
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}
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if (isVararg && classes.size() > 0) {
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if (unmodifiable) {
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classes = new ArrayList<>(classes);
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}
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int last = classes.size() - 1;
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Class<?> aClass = classes.get(classes.size() - 1);
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aClass = Array.newInstance(aClass, 2).getClass();
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classes.set(last, aClass);
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}
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return classes;
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}
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private List<Class<?>> getCatcherParams() {
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int catchArgc = 1 + this.argsCount - dropped;
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List<Class<?>> result = new ArrayList<>(
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thrower.type().parameterList().subList(0, catchArgc - 1));
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// prepend throwable
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result.add(0, testCase.throwableClass);
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return result;
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}
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private void runTest() {
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Helper.clear();
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Object[] args = Helper.randomArgs(
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argsCount, thrower.type().parameterArray());
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Object arg0 = Helper.MISSING_ARG;
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Object arg1 = testCase.thrown;
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if (argsCount > 0) {
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arg0 = args[0];
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}
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if (argsCount > 1) {
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args[1] = arg1;
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}
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Asserts.assertEQ(nargs, thrower.type().parameterCount());
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if (argsCount < nargs) {
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Object[] appendArgs = {arg0, arg1};
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appendArgs = Arrays.copyOfRange(appendArgs, argsCount, nargs);
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thrower = MethodHandles.insertArguments(
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thrower, argsCount, appendArgs);
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}
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Asserts.assertEQ(argsCount, thrower.type().parameterCount());
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MethodHandle target = MethodHandles.catchException(
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testCase.filter(thrower), testCase.throwableClass,
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testCase.filter(catcher));
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Asserts.assertEQ(thrower.type(), target.type());
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Asserts.assertEQ(argsCount, target.type().parameterCount());
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Object returned;
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try {
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returned = target.invokeWithArguments(args);
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} catch (Throwable ex) {
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testCase.assertCatch(ex);
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returned = ex;
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}
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testCase.assertReturn(returned, arg0, arg1, dropped, args);
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}
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}
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class TestFactory {
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public static final List<CatchExceptionTest> MANDATORY_TEST_CASES = new ArrayList<>();
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private static final int MIN_TESTED_ARITY = 10;
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static {
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for (int[] args : new int[][]{
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{0, 0},
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{MIN_TESTED_ARITY, 0},
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{MIN_TESTED_ARITY, MIN_TESTED_ARITY},
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{CatchExceptionTest.MAX_ARITY, 0},
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{CatchExceptionTest.MAX_ARITY, CatchExceptionTest.MAX_ARITY},
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}) {
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MANDATORY_TEST_CASES.addAll(createTests(args[0], args[1]));
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}
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}
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private int count;
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private int args;
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private int dropArgs;
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private int currentMaxDrops;
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private int maxArgs;
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private int maxDrops;
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private int constructor;
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private int constructorSize;
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private boolean isVararg;
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public TestFactory() {
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if (Helper.IS_THOROUGH) {
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maxArgs = maxDrops = CatchExceptionTest.MAX_ARITY;
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} else {
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maxArgs = MIN_TESTED_ARITY
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+ Helper.RNG.nextInt(CatchExceptionTest.MAX_ARITY
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- MIN_TESTED_ARITY)
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+ 1;
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maxDrops = MIN_TESTED_ARITY
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+ Helper.RNG.nextInt(maxArgs - MIN_TESTED_ARITY)
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+ 1;
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args = 1;
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}
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if (Helper.IS_VERBOSE) {
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System.out.printf("maxArgs = %d%nmaxDrops = %d%n",
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maxArgs, maxDrops);
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}
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constructorSize = TestCase.CONSTRUCTORS.size();
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}
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private static List<CatchExceptionTest> createTests(int argsCount,
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int catchDrops) {
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if (catchDrops > argsCount || argsCount < 0 || catchDrops < 0) {
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throw new IllegalArgumentException("argsCount = " + argsCount
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+ ", catchDrops = " + catchDrops
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);
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}
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List<CatchExceptionTest> result = new ArrayList<>(
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TestCase.CONSTRUCTORS.size());
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for (Supplier<TestCase> constructor : TestCase.CONSTRUCTORS) {
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result.add(new CatchExceptionTest(constructor.get(),
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/* isVararg = */ true,
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argsCount,
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catchDrops));
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result.add(new CatchExceptionTest(constructor.get(),
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/* isVararg = */ false,
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argsCount,
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catchDrops));
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}
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return result;
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}
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/**
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* @return next test from test matrix:
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* {varArgs, noVarArgs} x TestCase.rtypes x TestCase.THROWABLES x {1, .., maxArgs } x {1, .., maxDrops}
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*/
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public CatchExceptionTest nextTest() {
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if (constructor < constructorSize) {
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return createTest();
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}
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constructor = 0;
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count++;
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if (!Helper.IS_THOROUGH && count > Helper.TEST_LIMIT) {
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System.out.println("test limit is exceeded");
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return null;
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}
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if (dropArgs <= currentMaxDrops) {
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if (dropArgs == 1) {
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if (Helper.IS_THOROUGH || Helper.RNG.nextBoolean()) {
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++dropArgs;
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return createTest();
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} else if (Helper.IS_VERBOSE) {
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System.out.printf(
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"argsCount=%d : \"drop\" scenarios are skipped%n",
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args);
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}
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} else {
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++dropArgs;
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return createTest();
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}
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}
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if (args <= maxArgs) {
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dropArgs = 1;
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currentMaxDrops = Math.min(args, maxDrops);
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++args;
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return createTest();
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}
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return null;
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}
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private CatchExceptionTest createTest() {
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if (!Helper.IS_THOROUGH) {
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return new CatchExceptionTest(
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TestCase.CONSTRUCTORS.get(constructor++).get(),
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Helper.RNG.nextBoolean(), args, dropArgs);
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} else {
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if (isVararg) {
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isVararg = false;
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return new CatchExceptionTest(
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TestCase.CONSTRUCTORS.get(constructor++).get(),
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isVararg, args, dropArgs);
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} else {
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isVararg = true;
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return new CatchExceptionTest(
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TestCase.CONSTRUCTORS.get(constructor).get(),
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isVararg, args, dropArgs);
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}
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}
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}
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}
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class TestCase<T> {
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private static enum ThrowMode {
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NOTHING,
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CAUGHT,
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UNCAUGHT,
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ADAPTER
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}
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@SuppressWarnings("unchecked")
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public static final List<Supplier<TestCase>> CONSTRUCTORS;
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private static final MethodHandle FAKE_IDENTITY;
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private static final MethodHandle THROW_OR_RETURN;
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private static final MethodHandle CATCHER;
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static {
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try {
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MethodHandles.Lookup lookup = MethodHandles.lookup();
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THROW_OR_RETURN = lookup.findStatic(
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TestCase.class,
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"throwOrReturn",
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MethodType.methodType(Object.class, Object.class,
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Throwable.class)
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);
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CATCHER = lookup.findStatic(
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TestCase.class,
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"catcher",
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MethodType.methodType(Object.class, Object.class));
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FAKE_IDENTITY = lookup.findVirtual(
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TestCase.class, "fakeIdentity",
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MethodType.methodType(Object.class, Object.class));
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} catch (NoSuchMethodException | IllegalAccessException e) {
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throw new Error(e);
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}
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PartialConstructor[] constructors = {
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create(Object.class, Object.class::cast),
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create(String.class, Objects::toString),
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create(int[].class, x -> new int[]{Objects.hashCode(x)}),
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create(long.class,
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x -> Objects.hashCode(x) & (-1L >>> 32)),
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create(void.class, TestCase::noop)};
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Throwable[] throwables = {
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new ClassCastException("testing"),
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new java.io.IOException("testing"),
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new LinkageError("testing")};
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List<Supplier<TestCase>> list = new ArrayList<>(constructors.length *
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throwables.length * ThrowMode.values().length);
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//noinspection unchecked
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for (PartialConstructor f : constructors) {
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for (ThrowMode mode : ThrowMode.values()) {
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for (Throwable t : throwables) {
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|
|
list.add(f.apply(mode, t));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
CONSTRUCTORS = Collections.unmodifiableList(list);
|
||
|
|
}
|
||
|
|
|
||
|
|
public final Class<T> rtype;
|
||
|
|
public final ThrowMode throwMode;
|
||
|
|
public final Throwable thrown;
|
||
|
|
public final Class<? extends Throwable> throwableClass;
|
||
|
|
/**
|
||
|
|
* MH which takes 2 args (Object,Throwable), 1st is the return value,
|
||
|
|
* 2nd is the exception which will be thrown, if it's supposed in current
|
||
|
|
* {@link #throwMode}.
|
||
|
|
*/
|
||
|
|
public final MethodHandle thrower;
|
||
|
|
private final Function<Object, T> cast;
|
||
|
|
protected MethodHandle filter;
|
||
|
|
private int fakeIdentityCount;
|
||
|
|
|
||
|
|
private TestCase(Class<T> rtype, Function<Object, T> cast,
|
||
|
|
ThrowMode throwMode, Throwable thrown)
|
||
|
|
throws NoSuchMethodException, IllegalAccessException {
|
||
|
|
this.cast = cast;
|
||
|
|
filter = MethodHandles.lookup().findVirtual(
|
||
|
|
Function.class,
|
||
|
|
"apply",
|
||
|
|
MethodType.methodType(Object.class, Object.class))
|
||
|
|
.bindTo(cast);
|
||
|
|
this.rtype = rtype;
|
||
|
|
this.throwMode = throwMode;
|
||
|
|
this.throwableClass = thrown.getClass();
|
||
|
|
switch (throwMode) {
|
||
|
|
case NOTHING:
|
||
|
|
this.thrown = null;
|
||
|
|
break;
|
||
|
|
case ADAPTER:
|
||
|
|
case UNCAUGHT:
|
||
|
|
this.thrown = new Error("do not catch this");
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
this.thrown = thrown;
|
||
|
|
}
|
||
|
|
|
||
|
|
MethodHandle throwOrReturn = THROW_OR_RETURN;
|
||
|
|
if (throwMode == ThrowMode.ADAPTER) {
|
||
|
|
MethodHandle fakeIdentity = FAKE_IDENTITY.bindTo(this);
|
||
|
|
for (int i = 0; i < 10; ++i) {
|
||
|
|
throwOrReturn = MethodHandles.filterReturnValue(
|
||
|
|
throwOrReturn, fakeIdentity);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
thrower = throwOrReturn.asType(MethodType.genericMethodType(2));
|
||
|
|
}
|
||
|
|
|
||
|
|
private static Void noop(Object x) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static <T2> PartialConstructor create(
|
||
|
|
Class<T2> rtype, Function<Object, T2> cast) {
|
||
|
|
return (t, u) -> () -> {
|
||
|
|
try {
|
||
|
|
return new TestCase<>(rtype, cast, t, u);
|
||
|
|
} catch (NoSuchMethodException | IllegalAccessException e) {
|
||
|
|
throw new Error(e);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
private static <T extends Throwable>
|
||
|
|
Object throwOrReturn(Object normal, T exception) throws T {
|
||
|
|
if (exception != null) {
|
||
|
|
Helper.called("throwOrReturn/throw", normal, exception);
|
||
|
|
throw exception;
|
||
|
|
}
|
||
|
|
Helper.called("throwOrReturn/normal", normal, exception);
|
||
|
|
return normal;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static <T extends Throwable>
|
||
|
|
Object catcher(Object o) {
|
||
|
|
Helper.called("catcher", o);
|
||
|
|
return o;
|
||
|
|
}
|
||
|
|
|
||
|
|
public MethodHandle filter(MethodHandle target) {
|
||
|
|
return MethodHandles.filterReturnValue(target, filter);
|
||
|
|
}
|
||
|
|
|
||
|
|
public MethodHandle getCatcher(List<Class<?>> classes) {
|
||
|
|
return MethodHandles.filterReturnValue(Helper.AS_LIST.asType(
|
||
|
|
MethodType.methodType(Object.class, classes)),
|
||
|
|
CATCHER
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
@Override
|
||
|
|
public String toString() {
|
||
|
|
return "TestCase{" +
|
||
|
|
"rtype=" + rtype +
|
||
|
|
", throwMode=" + throwMode +
|
||
|
|
", throwableClass=" + throwableClass +
|
||
|
|
'}';
|
||
|
|
}
|
||
|
|
|
||
|
|
public String callName() {
|
||
|
|
return "throwOrReturn/" +
|
||
|
|
(throwMode == ThrowMode.NOTHING
|
||
|
|
? "normal"
|
||
|
|
: "throw");
|
||
|
|
}
|
||
|
|
|
||
|
|
public void assertReturn(Object returned, Object arg0, Object arg1,
|
||
|
|
int catchDrops, Object... args) {
|
||
|
|
int lag = 0;
|
||
|
|
if (throwMode == ThrowMode.CAUGHT) {
|
||
|
|
lag = 1;
|
||
|
|
}
|
||
|
|
Helper.assertCalled(lag, callName(), arg0, arg1);
|
||
|
|
|
||
|
|
if (throwMode == ThrowMode.NOTHING) {
|
||
|
|
assertEQ(cast.apply(arg0), returned);
|
||
|
|
} else if (throwMode == ThrowMode.CAUGHT) {
|
||
|
|
List<Object> catchArgs = new ArrayList<>(Arrays.asList(args));
|
||
|
|
// catcher receives an initial subsequence of target arguments:
|
||
|
|
catchArgs.subList(args.length - catchDrops, args.length).clear();
|
||
|
|
// catcher also receives the exception, prepended:
|
||
|
|
catchArgs.add(0, thrown);
|
||
|
|
Helper.assertCalled("catcher", catchArgs);
|
||
|
|
assertEQ(cast.apply(catchArgs), returned);
|
||
|
|
}
|
||
|
|
Asserts.assertEQ(0, fakeIdentityCount);
|
||
|
|
}
|
||
|
|
|
||
|
|
private void assertEQ(T t, Object returned) {
|
||
|
|
if (rtype.isArray()) {
|
||
|
|
Asserts.assertEQ(t.getClass(), returned.getClass());
|
||
|
|
int n = Array.getLength(t);
|
||
|
|
Asserts.assertEQ(n, Array.getLength(returned));
|
||
|
|
for (int i = 0; i < n; ++i) {
|
||
|
|
Asserts.assertEQ(Array.get(t, i), Array.get(returned, i));
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
Asserts.assertEQ(t, returned);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private Object fakeIdentity(Object x) {
|
||
|
|
System.out.println("should throw through this!");
|
||
|
|
++fakeIdentityCount;
|
||
|
|
return x;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void assertCatch(Throwable ex) {
|
||
|
|
try {
|
||
|
|
Asserts.assertSame(thrown, ex,
|
||
|
|
"must get the out-of-band exception");
|
||
|
|
} catch (Throwable t) {
|
||
|
|
ex.printStackTrace();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public interface PartialConstructor
|
||
|
|
extends BiFunction<ThrowMode, Throwable, Supplier<TestCase>> {
|
||
|
|
}
|
||
|
|
}
|