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44 changes: 44 additions & 0 deletions
44
src/main/java/net/pistonmaster/serverwrecker/ServerWreckerLauncher.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| /* | ||
| * ServerWrecker | ||
| * | ||
| * Copyright (C) 2023 ServerWrecker | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as | ||
| * published by the Free Software Foundation, either version 3 of the | ||
| * License, or (at your option) any later version. | ||
| * | ||
| * This program 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 for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public | ||
| * License along with this program. If not, see | ||
| * <http://www.gnu.org/licenses/gpl-3.0.html>. | ||
| */ | ||
| package net.pistonmaster.serverwrecker; | ||
|
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| import net.pistonmaster.serverwrecker.util.SWContextClassLoader; | ||
|
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| import java.util.List; | ||
|
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| /** | ||
| * This class only changes the classLoader for the rest of the program. | ||
| * This is so we can merge plugin and server classes. | ||
| */ | ||
| public class ServerWreckerLauncher { | ||
| private static final SWContextClassLoader SW_CONTEXT_CLASS_LOADER = new SWContextClassLoader(); | ||
|
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| public static void main(String[] args) { | ||
| Thread.currentThread().setContextClassLoader(SW_CONTEXT_CLASS_LOADER); | ||
|
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| try { | ||
| SW_CONTEXT_CLASS_LOADER.loadClass("net.pistonmaster.serverwrecker.ServerWreckerBootstrap") | ||
| .getDeclaredMethod("bootstrap", String[].class, List.class) | ||
| .invoke(null, args, SW_CONTEXT_CLASS_LOADER.getCheckedClassLoaders()); | ||
| } catch (ReflectiveOperationException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
| } |
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89 changes: 89 additions & 0 deletions
89
src/main/java/net/pistonmaster/serverwrecker/util/CustomClassProvider.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| /* | ||
| * ServerWrecker | ||
| * | ||
| * Copyright (C) 2023 ServerWrecker | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as | ||
| * published by the Free Software Foundation, either version 3 of the | ||
| * License, or (at your option) any later version. | ||
| * | ||
| * This program 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 for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public | ||
| * License along with this program. If not, see | ||
| * <http://www.gnu.org/licenses/gpl-3.0.html>. | ||
| */ | ||
| package net.pistonmaster.serverwrecker.util; | ||
|
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| import com.google.common.reflect.ClassPath; | ||
| import net.lenni0451.classtransform.utils.tree.IClassProvider; | ||
| import org.jetbrains.annotations.NotNull; | ||
|
|
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| import javax.annotation.Nonnull; | ||
| import java.io.ByteArrayOutputStream; | ||
| import java.io.InputStream; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Objects; | ||
| import java.util.function.Supplier; | ||
|
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| import static net.lenni0451.classtransform.utils.ASMUtils.slash; | ||
| import static net.lenni0451.classtransform.utils.Sneaky.sneakySupply; | ||
|
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| public class CustomClassProvider implements IClassProvider { | ||
| private final ClassPath[] classPaths; | ||
| private final ClassLoader[] classLoaders; | ||
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| public CustomClassProvider(List<ClassLoader> classLoaders) { | ||
| this.classLoaders = classLoaders.toArray(new ClassLoader[0]); | ||
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| try { | ||
| this.classPaths = new ClassPath[classLoaders.size()]; | ||
| for (int i = 0; i < classLoaders.size(); i++) { | ||
| this.classPaths[i] = ClassPath.from(classLoaders.get(i)); | ||
| } | ||
| } catch (Throwable t) { | ||
| throw new RuntimeException("Failed to initialize ClassPath", t); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public byte @NotNull [] getClass(@NotNull String name) throws ClassNotFoundException { | ||
| for (ClassLoader classLoader : this.classLoaders) { | ||
| byte[] bytes = this.getClassFromLoader(classLoader, name); | ||
| if (bytes != null) return bytes; | ||
| } | ||
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| throw new ClassNotFoundException("Class not found: " + name); | ||
| } | ||
|
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| private byte[] getClassFromLoader(ClassLoader classLoader, String name) { | ||
| try (InputStream is = classLoader.getResourceAsStream(slash(name) + ".class")) { | ||
| Objects.requireNonNull(is, "Class input stream is null"); | ||
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); | ||
| byte[] buf = new byte[1024]; | ||
| int len; | ||
| while ((len = is.read(buf)) > 0) baos.write(buf, 0, len); | ||
| return baos.toByteArray(); | ||
| } catch (Throwable t) { | ||
| return null; | ||
| } | ||
| } | ||
|
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| @Override | ||
| @Nonnull | ||
| public Map<String, Supplier<byte[]>> getAllClasses() { | ||
| Map<String, Supplier<byte[]>> map = new HashMap<>(); | ||
| for (ClassPath classPath : this.classPaths) { | ||
| for (ClassPath.ClassInfo classInfo : classPath.getAllClasses()) { | ||
| map.put(classInfo.getName(), sneakySupply(() -> this.getClass(classInfo.getName()))); | ||
| } | ||
| } | ||
| return map; | ||
| } | ||
| } |
98 changes: 98 additions & 0 deletions
98
src/main/java/net/pistonmaster/serverwrecker/util/SWContextClassLoader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| /* | ||
| * ServerWrecker | ||
| * | ||
| * Copyright (C) 2023 ServerWrecker | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as | ||
| * published by the Free Software Foundation, either version 3 of the | ||
| * License, or (at your option) any later version. | ||
| * | ||
| * This program 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 for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public | ||
| * License along with this program. If not, see | ||
| * <http://www.gnu.org/licenses/gpl-3.0.html>. | ||
| */ | ||
| package net.pistonmaster.serverwrecker.util; | ||
|
|
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| import lombok.Getter; | ||
| import net.lenni0451.reflect.Methods; | ||
| import net.lenni0451.reflect.exceptions.MethodInvocationException; | ||
| import net.pistonmaster.serverwrecker.ServerWreckerLauncher; | ||
|
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| import java.io.ByteArrayOutputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.lang.reflect.Method; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
|
|
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| public class SWContextClassLoader extends ClassLoader { | ||
| @Getter | ||
| private final List<ClassLoader> checkedClassLoaders = new ArrayList<>(); | ||
| private final Method findLoadedClassMethod = Objects.requireNonNull(Methods.getDeclaredMethod(ClassLoader.class, "loadClass", String.class, boolean.class)); | ||
| private final ClassLoader platformClassLoader = ClassLoader.getSystemClassLoader().getParent(); | ||
|
|
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| public SWContextClassLoader() { | ||
| this(ClassLoader.getSystemClassLoader()); | ||
| } | ||
|
|
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| private SWContextClassLoader(ClassLoader parent) { | ||
| super(parent); | ||
| this.checkedClassLoaders.add(parent); | ||
| } | ||
|
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| @Override | ||
| public Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException { | ||
| synchronized (getClassLoadingLock(name)) { | ||
| // First, check if the class has already been loaded | ||
| Class<?> c = findLoadedClass(name); | ||
| if (c == null) { | ||
| try { | ||
| return Methods.invoke(platformClassLoader, findLoadedClassMethod, name, resolve); | ||
| } catch (MethodInvocationException ignored) { | ||
| } | ||
|
|
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| byte[] classData = loadClassData(name); | ||
| if (classData == null) { | ||
| throw new ClassNotFoundException(); | ||
| } | ||
|
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| if (name.equals(ServerWreckerLauncher.class.getName())) { | ||
| return super.loadClass(name, resolve); | ||
| } | ||
|
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| c = defineClass(name, classData, 0, classData.length); | ||
| } | ||
|
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| if (resolve) { | ||
| resolveClass(c); | ||
| } | ||
|
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| return c; | ||
| } | ||
| } | ||
|
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| private byte[] loadClassData(String className) { | ||
| var classPath = className.replace('.', '/') + ".class"; | ||
|
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| for (var classLoader : checkedClassLoaders) { | ||
| try (InputStream inputStream = classLoader.getResourceAsStream(classPath)) { | ||
| if (inputStream == null) { | ||
| continue; | ||
| } | ||
|
|
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| return inputStream.readAllBytes(); | ||
| } catch (IOException e) { | ||
| e.printStackTrace(); | ||
| } | ||
| } | ||
|
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| return null; | ||
| } | ||
| } |