| /* |
| * Copyright (c) 2018, 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. |
| */ |
| |
| /* @test |
| * @summary unit tests for java.lang.invoke.MethodHandles |
| * @library /lib/testlibrary /java/lang/invoke/common |
| * @compile MethodHandlesTest.java MethodHandlesAsCollectorTest.java remote/RemoteExample.java |
| * @run junit/othervm/timeout=2500 -XX:+IgnoreUnrecognizedVMOptions |
| * -XX:-VerifyDependencies |
| * -esa |
| * test.java.lang.invoke.MethodHandlesAsCollectorTest |
| */ |
| |
| package test.java.lang.invoke; |
| |
| import org.junit.*; |
| import test.java.lang.invoke.lib.CodeCacheOverflowProcessor; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodType; |
| import java.util.Arrays; |
| |
| import static org.junit.Assert.*; |
| |
| public class MethodHandlesAsCollectorTest extends MethodHandlesTest { |
| |
| @Test // SLOW |
| public void testAsCollector() throws Throwable { |
| CodeCacheOverflowProcessor.runMHTest(this::testAsCollector0); |
| CodeCacheOverflowProcessor.runMHTest(this::testAsCollector1); |
| } |
| |
| public void testAsCollector0() throws Throwable { |
| if (CAN_SKIP_WORKING) return; |
| startTest("asCollector"); |
| for (Class<?> argType : new Class<?>[]{Object.class, Integer.class, int.class}) { |
| if (verbosity >= 3) |
| System.out.println("asCollector "+argType); |
| for (int nargs = 0; nargs < 50; nargs++) { |
| if (CAN_TEST_LIGHTLY && nargs > 11) break; |
| for (int pos = 0; pos <= nargs; pos++) { |
| if (CAN_TEST_LIGHTLY && pos > 2 && pos < nargs-2) continue; |
| if (nargs > 10 && pos > 4 && pos < nargs-4 && pos % 10 != 3) |
| continue; |
| testAsCollector(argType, pos, nargs); |
| } |
| } |
| } |
| } |
| |
| public void testAsCollector(Class<?> argType, int pos, int nargs) throws Throwable { |
| countTest(); |
| // fake up a MH with the same type as the desired adapter: |
| MethodHandle fake = varargsArray(nargs); |
| fake = changeArgTypes(fake, argType); |
| MethodType newType = fake.type(); |
| Object[] args = randomArgs(newType.parameterArray()); |
| // here is what should happen: |
| Object[] collectedArgs = Arrays.copyOfRange(args, 0, pos+1); |
| collectedArgs[pos] = Arrays.copyOfRange(args, pos, args.length); |
| // here is the MH which will witness the collected argument tail: |
| MethodHandle target = varargsArray(pos+1); |
| target = changeArgTypes(target, 0, pos, argType); |
| target = changeArgTypes(target, pos, pos+1, Object[].class); |
| if (verbosity >= 3) |
| System.out.println("collect from "+Arrays.asList(args)+" ["+pos+".."+nargs+"]"); |
| MethodHandle result = target.asCollector(Object[].class, nargs-pos).asType(newType); |
| Object[] returnValue = (Object[]) result.invokeWithArguments(args); |
| assertArrayEquals(collectedArgs, returnValue); |
| } |
| |
| public void testAsCollector1() throws Throwable { |
| if (CAN_SKIP_WORKING) return; |
| startTest("asCollector/pos"); |
| for (Class<?> argType : new Class<?>[]{Object.class, Integer.class, int.class}) { |
| if (verbosity >= 3) |
| System.out.println("asCollector/pos "+argType); |
| for (int nargs = 0; nargs < 50; nargs++) { |
| if (CAN_TEST_LIGHTLY && nargs > 11) break; |
| for (int pos = 0; pos <= nargs; pos++) { |
| if (CAN_TEST_LIGHTLY && pos > 2 && pos < nargs-2) continue; |
| if (nargs > 10 && pos > 4 && pos < nargs-4 && pos % 10 != 3) |
| continue; |
| for (int coll = 1; coll < nargs - pos; ++coll) { |
| if (coll > 4 && coll != 7 && coll != 11 && coll != 20 && coll < nargs - pos - 4) continue; |
| testAsCollector(argType, pos, coll, nargs); |
| } |
| } |
| } |
| } |
| } |
| |
| public void testAsCollector(Class<?> argType, int pos, int collect, int nargs) throws Throwable { |
| countTest(); |
| // fake up a MH with the same type as the desired adapter: |
| MethodHandle fake = varargsArray(nargs); |
| fake = changeArgTypes(fake, argType); |
| MethodType newType = fake.type(); |
| Object[] args = randomArgs(newType.parameterArray()); |
| // here is what should happen: |
| // new arg list has "collect" less arguments, but one extra for collected arguments array |
| int collectedLength = nargs-(collect-1); |
| Object[] collectedArgs = new Object[collectedLength]; |
| System.arraycopy(args, 0, collectedArgs, 0, pos); |
| collectedArgs[pos] = Arrays.copyOfRange(args, pos, pos+collect); |
| System.arraycopy(args, pos+collect, collectedArgs, pos+1, args.length-(pos+collect)); |
| // here is the MH which will witness the collected argument part (not tail!): |
| MethodHandle target = varargsArray(collectedLength); |
| target = changeArgTypes(target, 0, pos, argType); |
| target = changeArgTypes(target, pos, pos+1, Object[].class); |
| target = changeArgTypes(target, pos+1, collectedLength, argType); |
| if (verbosity >= 3) |
| System.out.println("collect "+collect+" from "+Arrays.asList(args)+" ["+pos+".."+(pos+collect)+"["); |
| MethodHandle result = target.asCollector(pos, Object[].class, collect).asType(newType); |
| Object[] returnValue = (Object[]) result.invokeWithArguments(args); |
| assertArrayEquals(collectedArgs, returnValue); |
| } |
| } |