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Curse the Java17ToJava8 converter to allow conversion of Geyser

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This commit is contained in:
RaphiMC 2023-04-23 02:09:59 +02:00
parent afa66eba2f
commit 30307d8231
1 changed files with 146 additions and 8 deletions
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154
src/main/java/net/raphimc/viaproxy/injection/Java17ToJava8.java
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@ -40,7 +40,7 @@ public class Java17ToJava8 implements IBytecodeTransformer {
@Override
public byte[] transform(String className, byte[] bytecode) {
if (!className.startsWith("com.mojang")) return null;
if (!className.startsWith("com.mojang") && !className.startsWith("org.geysermc")) return null;
ClassNode classNode = ASMUtils.fromBytes(bytecode);
if (classNode.version <= Opcodes.V1_8) return null;
@ -48,7 +48,11 @@ public class Java17ToJava8 implements IBytecodeTransformer {
classNode.version = Opcodes.V1_8;
this.makePublic(classNode);
this.convertStringConcatFactory(classNode);
this.convertCollections(classNode);
this.convertListMethods(classNode);
this.convertSetMethods(classNode);
this.convertMapMethods(classNode);
this.convertStreamMethods(classNode);
this.convertMiscMethods(classNode);
this.removeRecords(classNode);
return ASMUtils.toBytes(classNode, this.classProvider);
@ -94,15 +98,62 @@ public class Java17ToJava8 implements IBytecodeTransformer {
}
}
private void convertCollections(final ClassNode node) {
private void convertListMethods(final ClassNode node) {
for (MethodNode method : node.methods) {
for (AbstractInsnNode insn : method.instructions.toArray()) {
if (insn.getOpcode() == Opcodes.INVOKESTATIC) {
MethodInsnNode min = (MethodInsnNode) insn;
final MethodInsnNode min = (MethodInsnNode) insn;
if (!min.owner.equals("java/util/List")) continue;
Type[] args = Type.getArgumentTypes(min.desc);
InsnList list = new InsnList();
if (min.owner.equals("java/util/Set") && min.name.equals("of")) {
final InsnList list = new InsnList();
if (min.name.equals("of")) {
final Type[] args = Type.getArgumentTypes(min.desc);
if (args.length != 1 || args[0].getSort() != Type.ARRAY) {
int freeVarIndex = ASMUtils.getFreeVarIndex(method);
int argCount = args.length;
list.add(new TypeInsnNode(Opcodes.NEW, "java/util/ArrayList"));
list.add(new InsnNode(Opcodes.DUP));
list.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/util/ArrayList", "<init>", "()V"));
list.add(new VarInsnNode(Opcodes.ASTORE, freeVarIndex));
for (int i = 0; i < argCount; i++) {
list.add(new VarInsnNode(Opcodes.ALOAD, freeVarIndex));
list.add(new InsnNode(Opcodes.SWAP));
list.add(new MethodInsnNode(Opcodes.INVOKEINTERFACE, "java/util/List", "add", "(Ljava/lang/Object;)Z"));
list.add(new InsnNode(Opcodes.POP));
}
list.add(new VarInsnNode(Opcodes.ALOAD, freeVarIndex));
list.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/util/Collections", "unmodifiableList", "(Ljava/util/List;)Ljava/util/List;"));
}
} else if (min.name.equals("copyOf")) {
// TODO: Fix
/*list.add(new TypeInsnNode(Opcodes.NEW, "java/util/ArrayList"));
list.add(new InsnNode(Opcodes.DUP));
list.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/util/ArrayList", "<init>", "(Ljava/util/Collection;)V"));*/
list.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/util/Collections", "unmodifiableList", "(Ljava/util/List;)Ljava/util/List;"));
}
if (list.size() != 0) {
method.instructions.insertBefore(insn, list);
method.instructions.remove(insn);
}
}
}
}
}
private void convertSetMethods(final ClassNode node) {
for (MethodNode method : node.methods) {
for (AbstractInsnNode insn : method.instructions.toArray()) {
if (insn.getOpcode() == Opcodes.INVOKESTATIC) {
final MethodInsnNode min = (MethodInsnNode) insn;
if (!min.owner.equals("java/util/Set")) continue;
final InsnList list = new InsnList();
if (min.name.equals("of")) {
final Type[] args = Type.getArgumentTypes(min.desc);
if (args.length != 1 || args[0].getSort() != Type.ARRAY) {
int freeVarIndex = ASMUtils.getFreeVarIndex(method);
@ -120,13 +171,100 @@ public class Java17ToJava8 implements IBytecodeTransformer {
list.add(new VarInsnNode(Opcodes.ALOAD, freeVarIndex));
list.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/util/Collections", "unmodifiableSet", "(Ljava/util/Set;)Ljava/util/Set;"));
}
} else if (min.owner.equals("java/util/Map") && min.name.equals("of")) {
} else if (min.name.equals("copyOf")) {
// TODO: Fix
/*list.add(new TypeInsnNode(Opcodes.NEW, "java/util/HashSet"));
list.add(new InsnNode(Opcodes.DUP));
list.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/util/HashSet", "<init>", "(Ljava/util/Collection;)V"));*/
list.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/util/Collections", "unmodifiableSet", "(Ljava/util/Set;)Ljava/util/Set;"));
}
if (list.size() != 0) {
method.instructions.insertBefore(insn, list);
method.instructions.remove(insn);
}
}
}
}
}
private void convertMapMethods(final ClassNode node) {
for (MethodNode method : node.methods) {
for (AbstractInsnNode insn : method.instructions.toArray()) {
if (insn.getOpcode() == Opcodes.INVOKESTATIC) {
final MethodInsnNode min = (MethodInsnNode) insn;
if (!min.owner.equals("java/util/Map")) continue;
final InsnList list = new InsnList();
if (min.name.equals("of")) {
final Type[] args = Type.getArgumentTypes(min.desc);
if (args.length == 0) {
list.add(new TypeInsnNode(Opcodes.NEW, "java/util/HashMap"));
list.add(new InsnNode(Opcodes.DUP));
list.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/util/HashMap", "<init>", "()V"));
}
}
if (list.size() != 0) {
method.instructions.insertBefore(insn, list);
method.instructions.remove(insn);
}
}
}
}
}
private void convertStreamMethods(final ClassNode node) {
for (MethodNode method : node.methods) {
for (AbstractInsnNode insn : method.instructions.toArray()) {
if (insn.getOpcode() == Opcodes.INVOKEINTERFACE) {
final MethodInsnNode min = (MethodInsnNode) insn;
if (!min.owner.equals("java/util/stream/Stream")) continue;
final InsnList list = new InsnList();
if (min.name.equals("toList")) {
int freeVarIndex = ASMUtils.getFreeVarIndex(method);
list.add(new VarInsnNode(Opcodes.ASTORE, freeVarIndex));
list.add(new TypeInsnNode(Opcodes.NEW, "java/util/ArrayList"));
list.add(new InsnNode(Opcodes.DUP));
list.add(new VarInsnNode(Opcodes.ALOAD, freeVarIndex));
list.add(new MethodInsnNode(Opcodes.INVOKEINTERFACE, "java/util/stream/Stream", "toArray", "()[Ljava/lang/Object;"));
list.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/util/Arrays", "asList", "([Ljava/lang/Object;)Ljava/util/List;"));
list.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/util/ArrayList", "<init>", "(Ljava/util/Collection;)V"));
list.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "java/util/Collections", "unmodifiableList", "(Ljava/util/List;)Ljava/util/List;"));
}
if (list.size() != 0) {
method.instructions.insertBefore(insn, list);
method.instructions.remove(insn);
}
}
}
}
}
private void convertMiscMethods(final ClassNode node) {
for (MethodNode method : node.methods) {
for (AbstractInsnNode insn : method.instructions.toArray()) {
if (insn instanceof MethodInsnNode) {
final MethodInsnNode min = (MethodInsnNode) insn;
final InsnList list = new InsnList();
if (min.owner.equals("java/lang/String")) {
if (min.name.equals("isBlank") && min.getOpcode() == Opcodes.INVOKEVIRTUAL) {
list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/String", "trim", "()Ljava/lang/String;"));
list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/String", "isEmpty", "()Z"));
}
} else if (min.owner.equals("java/io/InputStream")) {
if (min.name.equals("readAllBytes") && min.getOpcode() == Opcodes.INVOKEVIRTUAL) {
list.add(new MethodInsnNode(Opcodes.INVOKESTATIC, "org/apache/commons/io/IOUtils", "toByteArray", "(Ljava/io/InputStream;)[B"));
}
}
if (list.size() != 0) {
method.instructions.insertBefore(insn, list);
method.instructions.remove(insn);