175 lines
6.2 KiB
Java
175 lines
6.2 KiB
Java
/*
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* Minecraft Forge
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* Copyright (c) 2016-2019.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation version 2.1
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* of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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package net.minecraftforge.fml.loading;
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import java.nio.file.Path;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Objects;
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import java.util.function.Consumer;
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import com.google.common.collect.Streams;
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import cpw.mods.modlauncher.serviceapi.ILaunchPluginService;
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import net.minecraftforge.api.distmarker.Dist;
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import net.minecraftforge.api.distmarker.OnlyIn;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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import org.apache.logging.log4j.Marker;
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import org.apache.logging.log4j.MarkerManager;
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import org.objectweb.asm.Handle;
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import org.objectweb.asm.MethodVisitor;
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import org.objectweb.asm.Opcodes;
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import org.objectweb.asm.Type;
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import org.objectweb.asm.tree.AbstractInsnNode;
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import org.objectweb.asm.tree.AnnotationNode;
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import org.objectweb.asm.tree.ClassNode;
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import org.objectweb.asm.tree.FieldNode;
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import org.objectweb.asm.tree.MethodNode;
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public class RuntimeDistCleaner implements ILaunchPluginService
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{
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private static final Logger LOGGER = LogManager.getLogger();
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private static final Marker DISTXFORM = MarkerManager.getMarker("DISTXFORM");
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private static String DIST;
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private static final String ONLYIN = Type.getDescriptor(OnlyIn.class);
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@Override
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public String name()
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{
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return "runtimedistcleaner";
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}
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@Override
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public void addResource(Path resource, String name)
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{
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}
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@Override
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public ClassNode processClass(ClassNode classNode, Type classType)
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{
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if (remove(classNode.visibleAnnotations, DIST))
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{
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LOGGER.debug(DISTXFORM, "Attempted to load class {} for invalid dist {}", classNode.name, DIST);
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throw new RuntimeException("Attempted to load class "+ classNode.name + " for invalid dist "+ DIST);
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}
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Iterator<FieldNode> fields = classNode.fields.iterator();
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while(fields.hasNext())
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{
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FieldNode field = fields.next();
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if (remove(field.visibleAnnotations, DIST))
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{
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LOGGER.debug(DISTXFORM,"Removing field: {}.{}", classNode.name, field.name);
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fields.remove();
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}
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}
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LambdaGatherer lambdaGatherer = new LambdaGatherer();
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Iterator<MethodNode> methods = classNode.methods.iterator();
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while(methods.hasNext())
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{
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MethodNode method = methods.next();
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if (remove(method.visibleAnnotations, DIST))
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{
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LOGGER.debug(DISTXFORM,"Removing method: {}.{}{}", classNode.name, method.name, method.desc);
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methods.remove();
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lambdaGatherer.accept(method);
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}
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}
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// remove dynamic lambda methods that are inside of removed methods
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List<Handle> dynamicLambdaHandles = lambdaGatherer.getDynamicLambdaHandles();
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if (!dynamicLambdaHandles.isEmpty())
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{
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methods = classNode.methods.iterator();
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while (methods.hasNext())
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{
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MethodNode method = methods.next();
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for (Handle dynamicLambdaHandle : dynamicLambdaHandles)
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{
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if (method.name.equals(dynamicLambdaHandle.getName()) && method.desc.equals(dynamicLambdaHandle.getDesc()))
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{
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LOGGER.debug(DISTXFORM,"Removing lambda method: {}.{}{}", classNode.name, method.name, method.desc);
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methods.remove();
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}
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}
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}
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}
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return classNode;
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}
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private boolean remove(final List<AnnotationNode> anns, final String side)
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{
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return !(anns == null) && anns.stream().
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filter(ann->Objects.equals(ann.desc, ONLYIN)).
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anyMatch(ann -> !Objects.equals(((String[])ann.values.get(ann.values.indexOf("value")+1))[1], side));
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}
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@SuppressWarnings("unchecked")
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@Override
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public Consumer<Dist> getExtension()
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{
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return (s)-> {
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DIST = s.name();
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LOGGER.debug(DISTXFORM, "Configuring for Dist {}", DIST);
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};
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}
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@Override
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public boolean handlesClass(Type classType, boolean isEmpty)
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{
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return !isEmpty;
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}
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private static class LambdaGatherer extends MethodVisitor {
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private static final Handle META_FACTORY = new Handle(Opcodes.H_INVOKESTATIC,
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"java/lang/invoke/LambdaMetafactory", "metafactory",
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"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;",
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false);
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private final List<Handle> dynamicLambdaHandles = new ArrayList<>();
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public LambdaGatherer() {
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super(Opcodes.ASM5);
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}
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public void accept(MethodNode method) {
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Streams.stream(method.instructions.iterator()).
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filter(insnNode->insnNode.getType() == AbstractInsnNode.INVOKE_DYNAMIC_INSN).
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forEach(insnNode->insnNode.accept(this));
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}
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@Override
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public void visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs)
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{
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if (META_FACTORY.equals(bsm))
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{
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Handle dynamicLambdaHandle = (Handle) bsmArgs[1];
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dynamicLambdaHandles.add(dynamicLambdaHandle);
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}
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}
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public List<Handle> getDynamicLambdaHandles()
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{
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return dynamicLambdaHandles;
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}
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}
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}
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