1/* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25package jdk.tools.jlink.internal.plugins; 26 27import java.util.function.Predicate; 28import jdk.internal.org.objectweb.asm.ClassReader; 29import jdk.internal.org.objectweb.asm.ClassWriter; 30import jdk.tools.jlink.plugin.ResourcePool; 31import jdk.tools.jlink.plugin.ResourcePoolBuilder; 32import jdk.tools.jlink.plugin.ResourcePoolEntry; 33import jdk.tools.jlink.plugin.Plugin; 34 35/** 36 * 37 * Strip debug attributes plugin 38 */ 39public final class StripDebugPlugin implements Plugin { 40 public static final String NAME = "strip-debug"; 41 private final Predicate<String> predicate; 42 43 public StripDebugPlugin() { 44 this((path) -> false); 45 } 46 47 StripDebugPlugin(Predicate<String> predicate) { 48 this.predicate = predicate; 49 } 50 51 @Override 52 public String getName() { 53 return NAME; 54 } 55 56 @Override 57 public String getDescription() { 58 return PluginsResourceBundle.getDescription(NAME); 59 } 60 61 @Override 62 public ResourcePool transform(ResourcePool in, ResourcePoolBuilder out) { 63 //remove *.diz files as well as debug attributes. 64 in.transformAndCopy((resource) -> { 65 ResourcePoolEntry res = resource; 66 if (resource.type().equals(ResourcePoolEntry.Type.CLASS_OR_RESOURCE)) { 67 String path = resource.path(); 68 if (path.endsWith(".class")) { 69 if (path.endsWith("module-info.class")) { 70 // XXX. Do we have debug info? Is Asm ready for module-info? 71 } else { 72 ClassReader reader = new ClassReader(resource.contentBytes()); 73 ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS); 74 reader.accept(writer, ClassReader.SKIP_DEBUG); 75 byte[] content = writer.toByteArray(); 76 res = resource.copyWithContent(content); 77 } 78 } 79 } else if (predicate.test(res.path())) { 80 res = null; 81 } 82 return res; 83 }, out); 84 85 return out.build(); 86 } 87} 88