1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/generics/bridges/BridgeHarness.java Thu Jul 11 14:07:39 2013 +0100
1.3 @@ -0,0 +1,218 @@
1.4 +/*
1.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/*
1.28 + * @test
1.29 + * @bug 8013789
1.30 + * @summary Compiler should emit bridges in interfaces
1.31 + * @library /tools/javac/lib
1.32 + * @build JavacTestingAbstractProcessor BridgeHarness
1.33 + * @run main BridgeHarness
1.34 + */
1.35 +
1.36 +import com.sun.source.util.JavacTask;
1.37 +import com.sun.tools.classfile.AccessFlags;
1.38 +import com.sun.tools.classfile.ClassFile;
1.39 +import com.sun.tools.classfile.ConstantPool;
1.40 +import com.sun.tools.classfile.ConstantPoolException;
1.41 +import com.sun.tools.classfile.Method;
1.42 +import com.sun.tools.javac.code.Symbol.ClassSymbol;
1.43 +import com.sun.tools.javac.util.List;
1.44 +
1.45 +import java.io.File;
1.46 +import java.util.Arrays;
1.47 +import java.util.Collections;
1.48 +import java.util.HashMap;
1.49 +import java.util.Map;
1.50 +import java.util.Set;
1.51 +
1.52 +import javax.annotation.processing.RoundEnvironment;
1.53 +import javax.annotation.processing.SupportedAnnotationTypes;
1.54 +import javax.lang.model.element.Element;
1.55 +import javax.lang.model.element.TypeElement;
1.56 +import javax.tools.JavaCompiler;
1.57 +import javax.tools.JavaFileObject;
1.58 +import javax.tools.StandardJavaFileManager;
1.59 +import javax.tools.ToolProvider;
1.60 +
1.61 +import static javax.tools.StandardLocation.*;
1.62 +
1.63 +public class BridgeHarness {
1.64 +
1.65 + /** number of errors found (must be zero for the test to pass) */
1.66 + static int nerrors = 0;
1.67 +
1.68 + /** the (shared) Java compiler used for compiling the tests */
1.69 + static final JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
1.70 +
1.71 + /** the (shared) file manager used by the compiler */
1.72 + static final StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
1.73 +
1.74 + public static void main(String[] args) throws Exception {
1.75 + //set sourcepath
1.76 + fm.setLocation(SOURCE_PATH,
1.77 + Arrays.asList(new File(System.getProperty("test.src"), "tests")));
1.78 + //set output (-d)
1.79 + fm.setLocation(javax.tools.StandardLocation.CLASS_OUTPUT,
1.80 + Arrays.asList(new File(System.getProperty("user.dir"))));
1.81 + for (JavaFileObject jfo : fm.list(SOURCE_PATH, "", Collections.singleton(JavaFileObject.Kind.SOURCE), true)) {
1.82 + //for each source, compile and check against annotations
1.83 + new BridgeHarness(jfo).compileAndCheck();
1.84 + }
1.85 + //if there were errors, fail
1.86 + if (nerrors > 0) {
1.87 + throw new AssertionError("Errors were found");
1.88 + }
1.89 + }
1.90 +
1.91 + /* utility methods */
1.92 +
1.93 + /**
1.94 + * Remove an element from a list
1.95 + */
1.96 + static <Z> List<Z> drop(List<Z> lz, Z z) {
1.97 + if (lz.head == z) {
1.98 + return drop(lz.tail, z);
1.99 + } else if (lz.isEmpty()) {
1.100 + return lz;
1.101 + } else {
1.102 + return drop(lz.tail, z).prepend(lz.head);
1.103 + }
1.104 + }
1.105 +
1.106 + /**
1.107 + * return a string representation of a bytecode method
1.108 + */
1.109 + static String descriptor(Method m, ConstantPool cp) throws ConstantPoolException {
1.110 + return m.getName(cp) + m.descriptor.getValue(cp);
1.111 + }
1.112 +
1.113 + /* test harness */
1.114 +
1.115 + /** Test file to be compiled */
1.116 + JavaFileObject jfo;
1.117 +
1.118 + /** Mapping between class name and list of bridges in class with that name */
1.119 + Map<String, List<Bridge>> bridgesMap = new HashMap<String, List<Bridge>>();
1.120 +
1.121 + protected BridgeHarness(JavaFileObject jfo) {
1.122 + this.jfo = jfo;
1.123 + }
1.124 +
1.125 + /**
1.126 + * Compile a test using a custom annotation processor and check the generated
1.127 + * bytecode against discovered annotations.
1.128 + */
1.129 + protected void compileAndCheck() throws Exception {
1.130 + JavacTask ct = (JavacTask)comp.getTask(null, fm, null, null, null, Arrays.asList(jfo));
1.131 + ct.setProcessors(Collections.singleton(new BridgeFinder()));
1.132 +
1.133 + for (JavaFileObject jfo : ct.generate()) {
1.134 + checkBridges(jfo);
1.135 + }
1.136 + }
1.137 +
1.138 + /**
1.139 + * Check that every bridge in the generated classfile has a matching bridge
1.140 + * annotation in the bridge map
1.141 + */
1.142 + protected void checkBridges(JavaFileObject jfo) {
1.143 + try {
1.144 + ClassFile cf = ClassFile.read(jfo.openInputStream());
1.145 + System.err.println("checking: " + cf.getName());
1.146 +
1.147 + List<Bridge> bridgeList = bridgesMap.get(cf.getName());
1.148 + if (bridgeList == null) {
1.149 + //no bridges - nothing to check;
1.150 + bridgeList = List.nil();
1.151 + }
1.152 +
1.153 + for (Method m : cf.methods) {
1.154 + if (m.access_flags.is(AccessFlags.ACC_SYNTHETIC | AccessFlags.ACC_BRIDGE)) {
1.155 + //this is a bridge - see if there's a match in the bridge list
1.156 + Bridge match = null;
1.157 + for (Bridge b : bridgeList) {
1.158 + if (b.value().equals(descriptor(m, cf.constant_pool))) {
1.159 + match = b;
1.160 + break;
1.161 + }
1.162 + }
1.163 + if (match == null) {
1.164 + error("No annotation for bridge method: " + descriptor(m, cf.constant_pool));
1.165 + } else {
1.166 + bridgeList = drop(bridgeList, match);
1.167 + }
1.168 + }
1.169 + }
1.170 + if (bridgeList.nonEmpty()) {
1.171 + error("Redundant bridge annotation found: " + bridgeList.head.value());
1.172 + }
1.173 + } catch (Exception e) {
1.174 + e.printStackTrace();
1.175 + throw new Error("error reading " + jfo.toUri() +": " + e);
1.176 + }
1.177 + }
1.178 +
1.179 + /**
1.180 + * Log an error
1.181 + */
1.182 + protected void error(String msg) {
1.183 + nerrors++;
1.184 + System.err.printf("Error occurred while checking file: %s\nreason: %s\n", jfo.getName(), msg);
1.185 + }
1.186 +
1.187 + /**
1.188 + * This annotation processor is used to populate the bridge map with the
1.189 + * contents of the annotations that are found on the tests being compiled
1.190 + */
1.191 + @SupportedAnnotationTypes({"Bridges","Bridge"})
1.192 + class BridgeFinder extends JavacTestingAbstractProcessor {
1.193 + @Override
1.194 + public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
1.195 + if (roundEnv.processingOver())
1.196 + return true;
1.197 +
1.198 + TypeElement bridgeAnno = elements.getTypeElement("Bridge");
1.199 + TypeElement bridgesAnno = elements.getTypeElement("Bridges");
1.200 +
1.201 + //see if there are repeated annos
1.202 + for (Element elem: roundEnv.getElementsAnnotatedWith(bridgesAnno)) {
1.203 + List<Bridge> bridgeList = List.nil();
1.204 + Bridges bridges = elem.getAnnotation(Bridges.class);
1.205 + for (Bridge bridge : bridges.value()) {
1.206 + bridgeList = bridgeList.prepend(bridge);
1.207 + }
1.208 + bridgesMap.put(((ClassSymbol)elem).flatname.toString(), bridgeList);
1.209 + }
1.210 +
1.211 + //see if there are non-repeated annos
1.212 + for (Element elem: roundEnv.getElementsAnnotatedWith(bridgeAnno)) {
1.213 + Bridge bridge = elem.getAnnotation(Bridge.class);
1.214 + bridgesMap.put(((ClassSymbol)elem).flatname.toString(),
1.215 + List.of(bridge));
1.216 + }
1.217 +
1.218 + return true;
1.219 + }
1.220 + }
1.221 +}
