Open-source multiplayer game server compatible with the RuneScape client
https://www.openrs2.org/
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119 lines
3.5 KiB
119 lines
3.5 KiB
package dev.openrs2.deob.transform
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import com.github.michaelbull.logging.InlineLogger
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import dev.openrs2.asm.MemberRef
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import dev.openrs2.asm.classpath.ClassPath
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import dev.openrs2.asm.classpath.Library
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import dev.openrs2.asm.transform.Transformer
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import dev.openrs2.util.collect.DisjointSet
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import org.objectweb.asm.Opcodes
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import org.objectweb.asm.tree.ClassNode
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import org.objectweb.asm.tree.MethodNode
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import javax.inject.Singleton
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@Singleton
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class FinalTransformer : Transformer() {
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private val superClasses = mutableListOf<String>()
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private lateinit var inheritedMethodSets: DisjointSet<MemberRef>
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private var methodsChanged = 0
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override fun preTransform(classPath: ClassPath) {
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superClasses.clear()
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inheritedMethodSets = classPath.createInheritedMethodSets()
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methodsChanged = 0
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}
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override fun transformClass(classPath: ClassPath, library: Library, clazz: ClassNode): Boolean {
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val superClass = clazz.superName
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if (superClass != null) {
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superClasses += superClass
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}
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superClasses.addAll(clazz.interfaces)
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return false
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}
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private fun isMethodFinal(classPath: ClassPath, clazz: ClassNode, method: MethodNode): Boolean {
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if (method.name == "<init>") {
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return false
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} else if ((method.access and (Opcodes.ACC_ABSTRACT or Opcodes.ACC_PRIVATE or Opcodes.ACC_STATIC)) != 0) {
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return false
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}
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val thisClass = classPath[clazz.name]!!
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val partition = inheritedMethodSets[MemberRef(clazz, method)]!!
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for (methodRef in partition) {
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if (methodRef.owner == clazz.name) {
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continue
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}
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val otherClass = classPath[methodRef.owner]!!
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if (otherClass.methods.none { it.name == methodRef.name && it.desc == methodRef.desc }) {
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continue
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}
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if (thisClass.isAssignableFrom(otherClass)) {
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return false
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}
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}
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return true
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}
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override fun preTransformMethod(
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classPath: ClassPath,
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library: Library,
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clazz: ClassNode,
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method: MethodNode
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): Boolean {
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val access = method.access
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if (isMethodFinal(classPath, clazz, method)) {
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method.access = access or Opcodes.ACC_FINAL
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} else {
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method.access = access and Opcodes.ACC_FINAL.inv()
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}
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if (method.access != access) {
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methodsChanged++
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}
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return false
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}
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private fun isClassFinal(clazz: ClassNode): Boolean {
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if ((clazz.access and (Opcodes.ACC_ABSTRACT or Opcodes.ACC_INTERFACE)) != 0) {
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return false
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}
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return !superClasses.contains(clazz.name)
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}
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override fun postTransform(classPath: ClassPath) {
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var classesChanged = 0
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for (library in classPath.libraries) {
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for (clazz in library) {
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val access = clazz.access
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if (isClassFinal(clazz)) {
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clazz.access = access or Opcodes.ACC_FINAL
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} else {
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clazz.access = access and Opcodes.ACC_FINAL.inv()
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}
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if (clazz.access != access) {
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classesChanged++
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}
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}
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}
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logger.info { "Updated final modifier on $classesChanged classes and $methodsChanged methods" }
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}
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private companion object {
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private val logger = InlineLogger()
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}
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}
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