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