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Add Experimental CFR support. Line numbers and comments are not currently supported.

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This commit is contained in:
modmuss50 2020-07-26 21:22:17 +01:00
parent 88f5894570
commit cb52cabb18
3 changed files with 244 additions and 0 deletions
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1
build.gradle
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@ -57,6 +57,7 @@ dependencies {
// decompilers
implementation ('net.fabricmc:procyon-fabric-compilertools:0.5.35.13')
implementation ('org.jetbrains:intellij-fernflower:1.2.1.16')
implementation ('org.benf:cfr:0.150')
// source code remapping
implementation ('org.cadixdev:mercury:0.1.0.fabric-SNAPSHOT')

2
src/main/java/net/fabricmc/loom/LoomGradlePlugin.java
View file

@ -31,6 +31,7 @@ import org.gradle.api.Project;
import org.gradle.api.tasks.TaskContainer;
import net.fabricmc.loom.api.decompilers.LoomDecompiler;
import net.fabricmc.loom.decompilers.cfr.FabricCFRDecompiler;
import net.fabricmc.loom.decompilers.fernflower.FabricFernFlowerDecompiler;
import net.fabricmc.loom.providers.MappingsProvider;
import net.fabricmc.loom.task.CleanEclipseRunsTask;
@ -127,6 +128,7 @@ public class LoomGradlePlugin extends AbstractPlugin {
LoomGradleExtension extension = project.getExtensions().getByType(LoomGradleExtension.class);
extension.addDecompiler(new FabricFernFlowerDecompiler(project));
extension.addDecompiler(new FabricCFRDecompiler(project));
project.afterEvaluate((p) -> {
for (LoomDecompiler decompiler : extension.decompilers) {

241
src/main/java/net/fabricmc/loom/decompilers/cfr/FabricCFRDecompiler.java Normal file
View file

@ -0,0 +1,241 @@
/*
* This file is part of fabric-loom, licensed under the MIT License (MIT).
*
* Copyright (c) 2016, 2017, 2018 FabricMC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package net.fabricmc.loom.decompilers.cfr;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.function.Function;
import java.util.jar.Attributes;
import java.util.jar.JarEntry;
import java.util.jar.JarOutputStream;
import java.util.jar.Manifest;
import java.util.stream.Collectors;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import com.google.common.base.Charsets;
import com.google.common.collect.ImmutableMap;
import com.google.common.io.ByteStreams;
import org.benf.cfr.reader.api.CfrDriver;
import org.benf.cfr.reader.api.ClassFileSource;
import org.benf.cfr.reader.api.OutputSinkFactory;
import org.benf.cfr.reader.api.SinkReturns;
import org.benf.cfr.reader.bytecode.analysis.parse.utils.Pair;
import org.gradle.api.Project;
import org.gradle.api.internal.project.ProjectInternal;
import org.gradle.internal.logging.progress.ProgressLogger;
import org.gradle.internal.logging.progress.ProgressLoggerFactory;
import org.gradle.internal.service.ServiceRegistry;
import net.fabricmc.loom.api.decompilers.DecompilationMetadata;
import net.fabricmc.loom.api.decompilers.LoomDecompiler;
public class FabricCFRDecompiler implements LoomDecompiler {
private final Project project;
public FabricCFRDecompiler(Project project) {
this.project = project;
}
@Override
public String name() {
return "ExperimentalCfr";
}
@Override
public void decompile(Path compiledJar, Path sourcesDestination, Path linemapDestination, DecompilationMetadata metaData) {
project.getLogger().warn("!!!! The CFR decompiler support is currently incomplete, line numbers will not match up and there will be no javadocs in the generated source.");
// Setups the multi threaded logger, the thread id is used as the key to the ProgressLogger's
ServiceRegistry registry = ((ProjectInternal) project).getServices();
ProgressLoggerFactory factory = registry.get(ProgressLoggerFactory.class);
ProgressLogger progressGroup = factory.newOperation(getClass()).setDescription("Decompile");
Map<Long, ProgressLogger> loggerMap = new ConcurrentHashMap<>();
Function<Long, ProgressLogger> createLogger = (threadId) -> {
ProgressLogger pl = factory.newOperation(getClass(), progressGroup);
pl.setDescription("decompile worker");
pl.started();
return pl;
};
progressGroup.started();
Manifest manifest = new Manifest();
manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");
Set<String> addedDirectories = new HashSet<>();
try (OutputStream fos = Files.newOutputStream(sourcesDestination); JarOutputStream jos = new JarOutputStream(fos, manifest); ZipFile inputZip = new ZipFile(compiledJar.toFile())) {
CfrDriver driver = new CfrDriver.Builder()
.withOptions(ImmutableMap.of(
"renameillegalidents", "true",
"trackbytecodeloc", "true"
))
.withClassFileSource(new ClassFileSource() {
@Override
public void informAnalysisRelativePathDetail(String usePath, String classFilePath) {
}
@Override
public Collection<String> addJar(String jarPath) {
return null;
}
@Override
public String getPossiblyRenamedPath(String path) {
return path;
}
@Override
public Pair<byte[], String> getClassFileContent(String path) throws IOException {
ZipEntry zipEntry = inputZip.getEntry(path);
if (zipEntry == null) {
throw new FileNotFoundException(path);
}
try (InputStream inputStream = inputZip.getInputStream(zipEntry)) {
return Pair.make(ByteStreams.toByteArray(inputStream), path);
}
}
})
.withOutputSink(new OutputSinkFactory() {
@Override
public List<SinkClass> getSupportedSinks(SinkType sinkType, Collection<SinkClass> available) {
switch (sinkType) {
case PROGRESS:
return Collections.singletonList(SinkClass.STRING);
case JAVA:
return Collections.singletonList(SinkClass.DECOMPILED);
default:
return Collections.emptyList();
}
}
@SuppressWarnings("unchecked")
@Override
public <T> Sink<T> getSink(SinkType sinkType, SinkClass sinkClass) {
switch (sinkType) {
case PROGRESS:
return (p) -> project.getLogger().debug((String) p);
case JAVA:
return (Sink<T>) decompiledSink(jos, addedDirectories);
case EXCEPTION:
return (e) -> project.getLogger().error((String) e);
}
return null;
}
})
.build();
List<String> classes = Collections.list(inputZip.entries()).stream()
.map(ZipEntry::getName)
.filter(input -> input.endsWith(".class"))
.collect(Collectors.toList());
ExecutorService executorService = Executors.newFixedThreadPool(metaData.numberOfThreads);
List<Future<?>> futures = new LinkedList<>();
for (String clazz : classes) {
futures.add(executorService.submit(() -> {
loggerMap.computeIfAbsent(Thread.currentThread().getId(), createLogger).progress(clazz);
driver.analyse(Collections.singletonList(clazz));
}));
}
for (Future<?> future : futures) {
future.get();
}
} catch (IOException | InterruptedException | ExecutionException e) {
throw new RuntimeException("Failed to decompile", e);
} finally {
loggerMap.forEach((threadId, progressLogger) -> progressLogger.completed());
}
}
private static OutputSinkFactory.Sink<SinkReturns.Decompiled> decompiledSink(JarOutputStream jos, Set<String> addedDirectories) {
return decompiled -> {
String filename = decompiled.getPackageName().replace('.', '/');
if (!filename.isEmpty()) filename += "/";
filename += decompiled.getClassName() + ".java";
byte[] data = decompiled.getJava().getBytes(Charsets.UTF_8);
writeToJar(filename, data, jos, addedDirectories);
};
}
// TODO move to task queue?
private static synchronized void writeToJar(String filename, byte[] data, JarOutputStream jos, Set<String> addedDirectories) {
String[] path = filename.split("/");
String pathPart = "";
for (int i = 0; i < path.length - 1; i++) {
pathPart += path[i] + "/";
if (addedDirectories.add(pathPart)) {
JarEntry entry = new JarEntry(pathPart);
entry.setTime(new Date().getTime());
try {
jos.putNextEntry(entry);
jos.closeEntry();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
JarEntry entry = new JarEntry(filename);
entry.setTime(new Date().getTime());
entry.setSize(data.length);
try {
jos.putNextEntry(entry);
jos.write(data);
jos.closeEntry();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}