131 lines
4.8 KiB
Java
131 lines
4.8 KiB
Java
/*
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* Copyright (c) 2021, 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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/**
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* @test
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* @bug 8263642 8268885
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* @summary javac should not emit duplicate checkcast for first bound of intersection type in cast
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* duplicate checkcast when destination type is not first type of intersection type
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* @library /tools/lib
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* @enablePreview
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* @modules jdk.compiler/com.sun.tools.javac.api
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* jdk.compiler/com.sun.tools.javac.main
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* java.base/jdk.internal.classfile.impl
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* @build toolbox.ToolBox toolbox.JavacTask
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* @run main DuplicatedCheckcastTest
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*/
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import java.nio.file.Path;
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import java.util.ArrayList;
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import java.lang.classfile.*;
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import java.lang.classfile.attribute.*;
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import java.lang.classfile.constantpool.ClassEntry;
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import java.lang.classfile.instruction.*;
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import toolbox.JavacTask;
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import toolbox.TestRunner;
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import toolbox.ToolBox;
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public class DuplicatedCheckcastTest extends TestRunner {
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ToolBox tb;
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ClassModel cf;
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public DuplicatedCheckcastTest() {
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super(System.err);
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tb = new ToolBox();
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}
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public static void main(String[] args) throws Exception {
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DuplicatedCheckcastTest t = new DuplicatedCheckcastTest();
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t.runTests();
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}
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static final String Code1 =
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"""
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class IntersectionTypeTest {
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interface I1 { }
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static class C1 { }
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static Object test(Object o) {
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return (C1 & I1) o;
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}
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}
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""";
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static final String Code2 =
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"""
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class IntersectionTypeTest {
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interface I1 {}
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interface I2 {}
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static class C {}
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void test() {
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I2 i = (I1 & I2) new C();
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}
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}
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""";
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@Test
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public void testDuplicatedCheckcast() throws Exception {
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duplicateCheckCastHelper(Code1, "IntersectionTypeTest$I1", "IntersectionTypeTest$C1");
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duplicateCheckCastHelper(Code2, "IntersectionTypeTest$I1", "IntersectionTypeTest$I2");
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}
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private void duplicateCheckCastHelper(String source, String expected1, String expected2) throws Exception {
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Path curPath = Path.of(".");
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new JavacTask(tb)
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.sources(source)
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.outdir(curPath)
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.run();
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cf = ClassFile.of().parse(curPath.resolve("IntersectionTypeTest.class"));
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ArrayList<Instruction> checkCastList = new ArrayList<>();
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for (MethodModel method : cf.methods()) {
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if (method.methodName().equalsString("test")) {
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CodeAttribute code_attribute = method.findAttribute(Attributes.code()).orElseThrow();
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for (CodeElement ce : code_attribute.elementList()) {
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if (ce instanceof Instruction instruction && Opcode.CHECKCAST == instruction.opcode()) {
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checkCastList.add(instruction);
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}
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}
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}
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}
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if (checkCastList.size() != 2) {
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throw new AssertionError("The number of the instruction 'checkcast' is not right. " +
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"Expected number: 2, actual number: " + checkCastList.size());
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}
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checkClassName(checkCastList.get(0), expected1);
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checkClassName(checkCastList.get(1), expected2);
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}
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public void checkClassName(Instruction ins, String expected) {
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String className = "";
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if (ins instanceof TypeCheckInstruction typeCheckInstruction) {
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ClassEntry classInfo = typeCheckInstruction.type();
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className = classInfo.asInternalName();
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}
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if (!expected.equals(className)) {
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throw new AssertionError("The type of the 'checkcast' is not right. Expected: " +
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expected + ", actual: " + className);
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}
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}
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}
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