forked from openrs2/openrs2
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package org.openrs2.patcher.transform |
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import com.github.michaelbull.logging.InlineLogger |
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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.FieldInsnNode |
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import org.objectweb.asm.tree.InsnList |
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import org.objectweb.asm.tree.InsnNode |
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import org.objectweb.asm.tree.IntInsnNode |
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import org.objectweb.asm.tree.JumpInsnNode |
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import org.objectweb.asm.tree.LdcInsnNode |
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import org.objectweb.asm.tree.MethodInsnNode |
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import org.objectweb.asm.tree.MethodNode |
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import org.objectweb.asm.tree.VarInsnNode |
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import org.openrs2.asm.InsnMatcher |
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import org.openrs2.asm.classpath.ClassPath |
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import org.openrs2.asm.classpath.Library |
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import org.openrs2.asm.transform.Transformer |
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import javax.inject.Singleton |
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@Singleton |
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public class InvalidKeyTransformer : Transformer() { |
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private var catchBlocks = 0 |
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override fun preTransform(classPath: ClassPath) { |
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catchBlocks = 0 |
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} |
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override fun transformCode(classPath: ClassPath, library: Library, clazz: ClassNode, method: MethodNode): Boolean { |
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for (match in MATCHER.match(method)) { |
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val ldc = if (match[8] is LdcInsnNode) { |
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match[8] |
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} else { |
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match[9] |
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} as LdcInsnNode |
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if (ldc.cst != "T3 - ") { |
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continue |
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} |
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val uncompressedStore = match[2] as VarInsnNode |
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val goto = match[3] as JumpInsnNode |
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val exLoad = match[5] |
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val invokeWrap = match[match.size - 2] |
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val exThrow = match[match.size - 1] |
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/* |
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* Replace: |
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* |
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* } catch (RuntimeException ex) { |
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* throw TracingException.wrap(ex, "T3 - " + ...); |
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* } |
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* |
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* with: |
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* |
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* } catch (RuntimeException ex) { |
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* System.out.println("T3 - " + ...); |
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* uncompressed = new byte[] { 0, 0, 0, 0, 1, 1 }; |
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* } |
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*/ |
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val list = InsnList() |
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list.add(FieldInsnNode(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;")) |
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list.add(InsnNode(Opcodes.SWAP)) |
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list.add(MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V")) |
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list.add(IntInsnNode(Opcodes.BIPUSH, 6)) |
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list.add(IntInsnNode(Opcodes.NEWARRAY, Opcodes.T_BYTE)) |
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list.add(InsnNode(Opcodes.DUP)) |
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list.add(InsnNode(Opcodes.ICONST_0)) |
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list.add(InsnNode(Opcodes.ICONST_0)) |
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list.add(InsnNode(Opcodes.BASTORE)) |
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list.add(VarInsnNode(Opcodes.ASTORE, uncompressedStore.`var`)) |
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list.add(JumpInsnNode(Opcodes.GOTO, goto.label)) |
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method.instructions.remove(exLoad) |
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method.instructions.insertBefore(invokeWrap, list) |
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method.instructions.remove(invokeWrap) |
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method.instructions.remove(exThrow) |
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catchBlocks++ |
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} |
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return false |
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} |
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override fun postTransform(classPath: ClassPath) { |
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logger.info { "Made $catchBlocks invalid key catch blocks non-fatal" } |
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} |
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private companion object { |
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private val logger = InlineLogger() |
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private val MATCHER = InsnMatcher.compile( |
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""" |
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ALOAD INVOKESTATIC ASTORE GOTO ASTORE ALOAD NEW DUP INVOKESPECIAL? LDC .*? INVOKESTATIC ATHROW |
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""".trimIndent() |
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) |
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} |
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} |
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