| /* |
| * Copyright (c) 2016, 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. |
| */ |
| package org.graalvm.compiler.bytecode; |
| |
| import static org.graalvm.compiler.bytecode.Bytecodes.ATHROW; |
| import static org.graalvm.compiler.bytecode.Bytecodes.INVOKEINTERFACE; |
| import static org.graalvm.compiler.bytecode.Bytecodes.INVOKESPECIAL; |
| import static org.graalvm.compiler.bytecode.Bytecodes.INVOKESTATIC; |
| import static org.graalvm.compiler.bytecode.Bytecodes.INVOKEVIRTUAL; |
| |
| import java.lang.annotation.Annotation; |
| |
| import jdk.vm.ci.meta.ConstantPool; |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| |
| /** |
| * Utilities for working around the absence of method annotations and parameter annotations on |
| * bridge methods where the bridged methods have method annotations or parameter annotations. Not |
| * all Java compilers copy method annotations and parameter annotations to bridge methods. |
| * |
| * @see <a href="http://bugs.java.com/view_bug.do?bug_id=6695379">6695379</a> |
| * @see <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=495396">495396</a> |
| * @see <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=427745">427745</a> |
| */ |
| public class BridgeMethodUtils { |
| |
| /** |
| * Gets the method bridged to by a {@linkplain ResolvedJavaMethod#isBridge() bridge} method. The |
| * value returned is the method called by {@code method} that has the same name as |
| * {@code bridge}. |
| * |
| * @param bridge a bridge method |
| * @return the method called by {@code bridge} whose name is the same as |
| * {@code bridge.getName()} |
| */ |
| public static ResolvedJavaMethod getBridgedMethod(ResolvedJavaMethod bridge) { |
| assert bridge.isBridge(); |
| Bytecode code = new ResolvedJavaMethodBytecode(bridge); |
| BytecodeStream stream = new BytecodeStream(code.getCode()); |
| int opcode = stream.currentBC(); |
| ResolvedJavaMethod bridged = null; |
| boolean calledAbstractMethodErrorConstructor = false; |
| while (opcode != Bytecodes.END) { |
| switch (opcode) { |
| case INVOKEVIRTUAL: |
| case INVOKESPECIAL: |
| case INVOKESTATIC: |
| case INVOKEINTERFACE: { |
| int cpi = stream.readCPI(); |
| ConstantPool cp = code.getConstantPool(); |
| cp.loadReferencedType(cpi, opcode); |
| ResolvedJavaMethod method = (ResolvedJavaMethod) cp.lookupMethod(cpi, opcode); |
| if (method.getName().equals(bridge.getName())) { |
| if (!assertionsEnabled()) { |
| return method; |
| } |
| assert bridged == null || bridged.equals(method) : String.format("Found calls to different methods named %s in bridge method %s%n callee 1: %s%n callee 2: %s", |
| bridge.getName(), bridge.format("%R %H.%n(%P)"), bridged.format("%R %H.%n(%P)"), method.format("%R %H.%n(%P)")); |
| bridged = method; |
| } else if (method.getName().equals("<init>") && method.getDeclaringClass().getName().equals("Ljava/lang/AbstractMethodError;")) { |
| calledAbstractMethodErrorConstructor = true; |
| } |
| break; |
| } |
| case ATHROW: { |
| if (calledAbstractMethodErrorConstructor) { |
| // This is a miranda method |
| return null; |
| } |
| } |
| } |
| stream.next(); |
| opcode = stream.currentBC(); |
| } |
| if (bridged == null) { |
| String dis = new BytecodeDisassembler().disassemble(bridge); |
| throw new InternalError(String.format("Couldn't find method bridged by %s:%n%s", bridge.format("%R %H.%n(%P)"), dis)); |
| } |
| return bridged; |
| } |
| |
| @SuppressWarnings("all") |
| private static boolean assertionsEnabled() { |
| boolean enabled = false; |
| assert enabled = true; |
| return enabled; |
| } |
| |
| /** |
| * A helper for {@link ResolvedJavaMethod#getAnnotation(Class)} that handles the absence of |
| * annotations on bridge methods where the bridged method has annotations. |
| */ |
| public static <T extends Annotation> T getAnnotation(Class<T> annotationClass, ResolvedJavaMethod method) { |
| T a = method.getAnnotation(annotationClass); |
| if (a == null && method.isBridge()) { |
| ResolvedJavaMethod bridged = getBridgedMethod(method); |
| if (bridged != null) { |
| a = bridged.getAnnotation(annotationClass); |
| } |
| } |
| return a; |
| } |
| |
| /** |
| * A helper for {@link ResolvedJavaMethod#getAnnotations()} that handles the absence of |
| * annotations on bridge methods where the bridged method has annotations. |
| */ |
| public static Annotation[] getAnnotations(ResolvedJavaMethod method) { |
| Annotation[] a = method.getAnnotations(); |
| if (a.length == 0 && method.isBridge()) { |
| ResolvedJavaMethod bridged = getBridgedMethod(method); |
| if (bridged != null) { |
| a = bridged.getAnnotations(); |
| } |
| } |
| return a; |
| } |
| |
| /** |
| * A helper for {@link ResolvedJavaMethod#getDeclaredAnnotations()} that handles the absence of |
| * annotations on bridge methods where the bridged method has annotations. |
| */ |
| public static Annotation[] getDeclaredAnnotations(ResolvedJavaMethod method) { |
| Annotation[] a = method.getAnnotations(); |
| if (a.length == 0 && method.isBridge()) { |
| ResolvedJavaMethod bridged = getBridgedMethod(method); |
| if (bridged != null) { |
| a = bridged.getDeclaredAnnotations(); |
| } |
| } |
| return a; |
| } |
| |
| /** |
| * A helper for {@link ResolvedJavaMethod#getParameterAnnotations()} that handles the absence of |
| * parameter annotations on bridge methods where the bridged method has parameter annotations. |
| */ |
| public static Annotation[][] getParameterAnnotations(ResolvedJavaMethod method) { |
| Annotation[][] a = method.getParameterAnnotations(); |
| if (a.length == 0 && method.isBridge()) { |
| ResolvedJavaMethod bridged = getBridgedMethod(method); |
| if (bridged != null) { |
| a = bridged.getParameterAnnotations(); |
| } |
| } |
| return a; |
| } |
| |
| /** |
| * A helper for {@link ResolvedJavaMethod#getParameterAnnotation(Class, int)} that handles the |
| * absence of parameter annotations on bridge methods where the bridged method has parameter |
| * annotations. |
| */ |
| public static <T extends Annotation> T getParameterAnnotation(Class<T> annotationClass, int parameterIndex, ResolvedJavaMethod method) { |
| T a = method.getParameterAnnotation(annotationClass, parameterIndex); |
| if (a == null && method.isBridge()) { |
| ResolvedJavaMethod bridged = getBridgedMethod(method); |
| if (bridged != null) { |
| a = bridged.getParameterAnnotation(annotationClass, parameterIndex); |
| } |
| } |
| return a; |
| } |
| } |