224 lines
8.0 KiB
Java
224 lines
8.0 KiB
Java
/*
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* Copyright (c) 2013, 2015, 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 8013789
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* @summary Compiler should emit bridges in interfaces
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* @library /tools/javac/lib
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* @enablePreview
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* @modules java.base/jdk.internal.classfile.impl
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* jdk.compiler/com.sun.tools.javac.code
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* jdk.compiler/com.sun.tools.javac.util
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* @build JavacTestingAbstractProcessor BridgeHarness
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* @run main BridgeHarness
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*/
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import com.sun.source.util.JavacTask;
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import java.lang.classfile.*;
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import com.sun.tools.javac.code.Symbol.ClassSymbol;
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import com.sun.tools.javac.util.List;
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import java.io.File;
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import java.io.InputStream;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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import javax.annotation.processing.RoundEnvironment;
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import javax.annotation.processing.SupportedAnnotationTypes;
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import javax.lang.model.element.Element;
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import javax.lang.model.element.TypeElement;
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import javax.tools.JavaCompiler;
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import javax.tools.JavaFileObject;
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import javax.tools.StandardJavaFileManager;
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import javax.tools.ToolProvider;
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import static javax.tools.StandardLocation.*;
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public class BridgeHarness {
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/** number of errors found (must be zero for the test to pass) */
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static int nerrors = 0;
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/** the (shared) Java compiler used for compiling the tests */
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static final JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
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/** the (shared) file manager used by the compiler */
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static final StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
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public static void main(String[] args) throws Exception {
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try {
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//set sourcepath
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fm.setLocation(SOURCE_PATH,
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Arrays.asList(new File(System.getProperty("test.src"), "tests")));
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//set output (-d)
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fm.setLocation(javax.tools.StandardLocation.CLASS_OUTPUT,
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Arrays.asList(new File(System.getProperty("user.dir"))));
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for (JavaFileObject jfo : fm.list(SOURCE_PATH, "", Collections.singleton(JavaFileObject.Kind.SOURCE), true)) {
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//for each source, compile and check against annotations
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new BridgeHarness(jfo).compileAndCheck();
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}
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//if there were errors, fail
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if (nerrors > 0) {
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throw new AssertionError("Errors were found");
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}
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} finally {
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fm.close();
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}
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}
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/* utility methods */
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/**
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* Remove an element from a list
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*/
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static <Z> List<Z> drop(List<Z> lz, Z z) {
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if (lz.head == z) {
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return drop(lz.tail, z);
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} else if (lz.isEmpty()) {
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return lz;
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} else {
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return drop(lz.tail, z).prepend(lz.head);
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}
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}
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/**
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* return a string representation of a bytecode method
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*/
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static String descriptor(MethodModel m) {
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return m.methodName() + m.methodTypeSymbol().descriptorString();
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}
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/* test harness */
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/** Test file to be compiled */
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JavaFileObject jfo;
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/** Mapping between class name and list of bridges in class with that name */
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Map<String, List<Bridge>> bridgesMap = new HashMap<String, List<Bridge>>();
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protected BridgeHarness(JavaFileObject jfo) {
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this.jfo = jfo;
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}
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/**
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* Compile a test using a custom annotation processor and check the generated
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* bytecode against discovered annotations.
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*/
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protected void compileAndCheck() throws Exception {
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JavacTask ct = (JavacTask)comp.getTask(null, fm, null, null, null, Arrays.asList(jfo));
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ct.setProcessors(Collections.singleton(new BridgeFinder()));
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for (JavaFileObject jfo : ct.generate()) {
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checkBridges(jfo);
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}
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}
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/**
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* Check that every bridge in the generated classfile has a matching bridge
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* annotation in the bridge map
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*/
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protected void checkBridges(JavaFileObject jfo) {
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try (InputStream is = jfo.openInputStream()) {
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ClassModel cf = ClassFile.of().parse(is.readAllBytes());
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System.err.println("checking: " + cf.thisClass().asInternalName());
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List<Bridge> bridgeList = bridgesMap.get(cf.thisClass().asInternalName());
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if (bridgeList == null) {
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//no bridges - nothing to check;
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bridgeList = List.nil();
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}
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for (MethodModel m : cf.methods()) {
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if ((m.flags().flagsMask() & (ClassFile.ACC_SYNTHETIC | ClassFile.ACC_BRIDGE)) != 0) {
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//this is a bridge - see if there's a match in the bridge list
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Bridge match = null;
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for (Bridge b : bridgeList) {
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if (b.value().equals(descriptor(m))) {
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match = b;
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break;
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}
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}
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if (match == null) {
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error("No annotation for bridge method: " + descriptor(m));
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} else {
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bridgeList = drop(bridgeList, match);
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}
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}
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}
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if (bridgeList.nonEmpty()) {
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error("Redundant bridge annotation found: " + bridgeList.head.value());
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}
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} catch (Exception e) {
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e.printStackTrace();
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throw new Error("error reading " + jfo.toUri() +": " + e);
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}
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}
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/**
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* Log an error
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*/
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protected void error(String msg) {
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nerrors++;
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System.err.printf("Error occurred while checking file: %s\nreason: %s\n", jfo.getName(), msg);
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}
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/**
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* This annotation processor is used to populate the bridge map with the
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* contents of the annotations that are found on the tests being compiled
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*/
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@SupportedAnnotationTypes({"Bridges","Bridge"})
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class BridgeFinder extends JavacTestingAbstractProcessor {
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@Override
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public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
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if (roundEnv.processingOver())
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return true;
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TypeElement bridgeAnno = elements.getTypeElement("Bridge");
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TypeElement bridgesAnno = elements.getTypeElement("Bridges");
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//see if there are repeated annos
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for (Element elem: roundEnv.getElementsAnnotatedWith(bridgesAnno)) {
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List<Bridge> bridgeList = List.nil();
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Bridges bridges = elem.getAnnotation(Bridges.class);
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for (Bridge bridge : bridges.value()) {
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bridgeList = bridgeList.prepend(bridge);
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}
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bridgesMap.put(((ClassSymbol)elem).flatname.toString(), bridgeList);
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}
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//see if there are non-repeated annos
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for (Element elem: roundEnv.getElementsAnnotatedWith(bridgeAnno)) {
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Bridge bridge = elem.getAnnotation(Bridge.class);
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bridgesMap.put(((ClassSymbol)elem).flatname.toString(),
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List.of(bridge));
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}
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return true;
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}
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}
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}
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