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Allow runtime-decompilation of exported classes using fernflower
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147
src/fernflower/java/org/spongepowered/asm/mixin/transformer/debug/RuntimeDecompiler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| /* | ||
| * This file is part of Sponge, licensed under the MIT License (MIT). | ||
| * | ||
| * Copyright (c) SpongePowered.org <http://www.spongepowered.org> | ||
| * Copyright (c) contributors | ||
| * | ||
| * 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 org.spongepowered.asm.mixin.transformer.debug; | ||
|
|
||
| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.util.Map; | ||
| import java.util.jar.Manifest; | ||
|
|
||
| import org.apache.commons.io.FileUtils; | ||
| import org.apache.logging.log4j.LogManager; | ||
| import org.apache.logging.log4j.Logger; | ||
| import org.jetbrains.java.decompiler.main.Fernflower; | ||
| import org.jetbrains.java.decompiler.main.extern.IBytecodeProvider; | ||
| import org.jetbrains.java.decompiler.main.extern.IFernflowerLogger; | ||
| import org.jetbrains.java.decompiler.main.extern.IResultSaver; | ||
| import org.jetbrains.java.decompiler.util.InterpreterUtil; | ||
|
|
||
| import com.google.common.base.Charsets; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import com.google.common.io.Files; | ||
|
|
||
| /** | ||
| * Wrapper for FernFlower to support runtime-decompilation of post-mixin classes | ||
| */ | ||
| public class RuntimeDecompiler extends IFernflowerLogger implements IDecompiler, IResultSaver { | ||
|
|
||
| private final Map<String, Object> options = ImmutableMap.<String, Object>builder() | ||
| .put("din", "0").put("rbr", "0").put("dgs", "1").put("asc", "1") | ||
| .put("den", "1").put("hdc", "1").put("ind", " ").build(); | ||
|
|
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| private final File outputPath; | ||
|
|
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| private final Logger logger = LogManager.getLogger("fernflower"); | ||
|
|
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| public RuntimeDecompiler(File outputPath) { | ||
| this.outputPath = outputPath; | ||
| if (this.outputPath.exists()) { | ||
| try { | ||
| FileUtils.deleteDirectory(this.outputPath); | ||
| } catch (IOException ex) { | ||
| this.logger.warn("Error cleaning output directory", ex); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void decompile(final File file) { | ||
| try { | ||
| Fernflower fernflower = new Fernflower(new IBytecodeProvider() { | ||
|
|
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| private byte[] byteCode; | ||
|
|
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| @Override | ||
| public byte[] getBytecode(String externalPath, String internalPath) throws IOException { | ||
| if (this.byteCode == null) { | ||
| this.byteCode = InterpreterUtil.getBytes(new File(externalPath)); | ||
| } | ||
| return this.byteCode; | ||
| } | ||
|
|
||
| }, this, this.options, this); | ||
|
|
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| fernflower.getStructContext().addSpace(file, true); | ||
| fernflower.decompileContext(); | ||
| } catch (Throwable ex) { | ||
| this.logger.warn("Decompilation error while processing {}", file.getName()); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void saveFolder(String path) { | ||
| } | ||
|
|
||
| @Override | ||
| public void saveClassFile(String path, String qualifiedName, String entryName, String content, int[] mapping) { | ||
| File file = new File(this.outputPath, qualifiedName + ".java"); | ||
| file.getParentFile().mkdirs(); | ||
| try { | ||
| this.logger.info("Writing {}", file.getAbsolutePath()); | ||
| Files.write(content, file, Charsets.UTF_8); | ||
| } catch (IOException ex) { | ||
| this.writeMessage("Cannot write source file " + file, ex); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void startReadingClass(String className) { | ||
| this.logger.info("Decompiling {}", className); | ||
| } | ||
|
|
||
| @Override | ||
| public void writeMessage(String message, Severity severity) { | ||
| this.logger.info(message); | ||
| } | ||
|
|
||
| @Override | ||
| public void writeMessage(String message, Throwable t) { | ||
| this.logger.info(message, t); | ||
| } | ||
|
|
||
| @Override | ||
| public void copyFile(String source, String path, String entryName) { | ||
| } | ||
|
|
||
| @Override | ||
| public void createArchive(String path, String archiveName, Manifest manifest) { | ||
| } | ||
|
|
||
| @Override | ||
| public void saveDirEntry(String path, String archiveName, String entryName) { | ||
| } | ||
|
|
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| @Override | ||
| public void copyEntry(String source, String path, String archiveName, String entry) { | ||
| } | ||
|
|
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| @Override | ||
| public void saveClassEntry(String path, String archiveName, String qualifiedName, String entryName, String content) { | ||
| } | ||
|
|
||
| @Override | ||
| public void closeArchive(String path, String archiveName) { | ||
| } | ||
| } |
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41 changes: 41 additions & 0 deletions
41
src/main/java/org/spongepowered/asm/mixin/transformer/debug/IDecompiler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| /* | ||
| * This file is part of Sponge, licensed under the MIT License (MIT). | ||
| * | ||
| * Copyright (c) SpongePowered.org <http://www.spongepowered.org> | ||
| * Copyright (c) contributors | ||
| * | ||
| * 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 org.spongepowered.asm.mixin.transformer.debug; | ||
|
|
||
| import java.io.File; | ||
|
|
||
| /** | ||
| * Interface to allow the actual decompiler to be loaded on-demand | ||
| */ | ||
| public interface IDecompiler { | ||
|
|
||
| /** | ||
| * Decompile a class file | ||
| * | ||
| * @param file .class file to decompile | ||
| */ | ||
| public abstract void decompile(File file); | ||
|
|
||
| } |