Examples with Code net.runelite.asm.attributes.Code used on opensource projects

Example 21 with Code

use of net.runelite.asm.attributes.Code in project runelite by runelite.

the class Renamer method renameClass.

private void renameClass(ClassGroup group, ClassFile cf, String name) {
    for (ClassFile c : group.getClasses()) {
        // rename on child interfaces and classes
        renameClass(c, cf, name);
        for (Method method : c.getMethods()) {
            // rename on instructions. this includes method calls and field accesses.
            if (method.getCode() != null) {
                Code code = method.getCode();
                // rename on instructions
                for (Instruction i : code.getInstructions().getInstructions()) {
                    i.renameClass(cf.getName(), name);
                }
                // rename on exception handlers
                Exceptions exceptions = code.getExceptions();
                exceptions.renameClass(cf, name);
            }
            // rename on parameters
            Signature.Builder builder = new Signature.Builder();
            Signature signature = method.getDescriptor();
            for (int i = 0; i < signature.size(); ++i) {
                Type type = signature.getTypeOfArg(i);
                if (type.getInternalName().equals(cf.getName())) {
                    builder.addArgument(Type.getType("L" + name + ";", type.getDimensions()));
                } else {
                    builder.addArgument(type);
                }
            }
            // rename return type
            if (signature.getReturnValue().getInternalName().equals(cf.getName())) {
                builder.setReturnType(Type.getType("L" + name + ";", signature.getReturnValue().getDimensions()));
            } else {
                builder.setReturnType(signature.getReturnValue());
            }
            Signature newSignature = builder.build();
            if (!method.getDescriptor().equals(newSignature)) {
                // Signature was updated. Annotate it
                if (method.getAnnotations().find(DeobAnnotations.OBFUSCATED_SIGNATURE) == null) {
                    // Signature was not previously renamed
                    method.getAnnotations().addAnnotation(DeobAnnotations.OBFUSCATED_SIGNATURE, "signature", method.getDescriptor().toString());
                }
            }
            method.setDescriptor(newSignature);
            // rename on exceptions thrown
            if (method.getExceptions() != null) {
                method.getExceptions().renameClass(cf, name);
            }
        }
        // rename on fields
        for (Field field : c.getFields()) {
            if (field.getType().getInternalName().equals(cf.getName())) {
                if (field.getAnnotations().find(DeobAnnotations.OBFUSCATED_SIGNATURE) == null) {
                    // Signature was updated. Annotate it
                    field.getAnnotations().addAnnotation(DeobAnnotations.OBFUSCATED_SIGNATURE, "signature", field.getType().toString());
                }
                field.setType(Type.getType("L" + name + ";", field.getType().getDimensions()));
            }
        }
    }
    if (cf.getAnnotations().find(DeobAnnotations.OBFUSCATED_NAME) == null) {
        cf.getAnnotations().addAnnotation(DeobAnnotations.OBFUSCATED_NAME, "value", cf.getName());
    }
    group.renameClass(cf, name);
}

Example 22 with Code

use of net.runelite.asm.attributes.Code in project runelite by runelite.

the class Renamer method regeneratePool.

private void regeneratePool(ClassGroup group) {
    for (ClassFile cf : group.getClasses()) {
        for (Method m : cf.getMethods()) {
            Code c = m.getCode();
            if (c == null) {
                continue;
            }
            c.getInstructions().regeneratePool();
        }
    }
}

Example 23 with Code

use of net.runelite.asm.attributes.Code in project runelite by runelite.

the class UnusedParameters method removeParameter.

public void removeParameter(ClassGroup group, List<Method> methods, Signature signature, Execution execution, int paramIndex, int lvtIndex) {
    int slots = signature.getTypeOfArg(paramIndex).getSize();
    for (ClassFile cf : group.getClasses()) {
        for (Method m : cf.getMethods()) {
            Code c = m.getCode();
            if (c == null) {
                continue;
            }
            for (Instruction i : new ArrayList<>(c.getInstructions().getInstructions())) {
                if (!(i instanceof InvokeInstruction)) {
                    continue;
                }
                InvokeInstruction ii = (InvokeInstruction) i;
                if (!ii.getMethods().stream().anyMatch(me -> methods.contains(me))) {
                    continue;
                }
                // remove parameter from instruction
                ii.removeParameter(paramIndex);
                Collection<InstructionContext> ics = invokes.get(i);
                assert ics != null;
                if (ics != null) {
                    for (InstructionContext ins : ics) {
                        // index from top of stack of parameter. 0 is the last parameter
                        int pops = signature.size() - paramIndex - 1;
                        StackContext sctx = ins.getPops().get(pops);
                        if (sctx.getPushed().getInstruction().getInstructions() == null) {
                            continue;
                        }
                        // remove parameter from stack
                        ins.removeStack(pops);
                    }
                }
            }
        }
    }
    for (Method method : methods) {
        if (method.getCode() != null) // adjust lvt indexes to get rid of idx in the method
        {
            for (Instruction ins : method.getCode().getInstructions().getInstructions()) {
                if (ins instanceof LVTInstruction) {
                    LVTInstruction lins = (LVTInstruction) ins;
                    int i = lins.getVariableIndex();
                    // current unused variable detection just looks for no accesses
                    assert i != lvtIndex;
                    // reassign
                    if (i > lvtIndex) {
                        assert i > 0;
                        assert i >= lvtIndex + slots;
                        Instruction newIns = lins.setVariableIndex(i - slots);
                        assert ins == newIns;
                    }
                }
            }
        }
    }
    for (Method method : methods) {
        method.getDescriptor().remove(paramIndex);
    }
}

Example 24 with Code

use of net.runelite.asm.attributes.Code in project runelite by runelite.

the class Frame method initialize.

public void initialize(InstructionContext ctx) {
    // initialize frame from invoking context
    assert ctx.getInstruction() instanceof InvokeInstruction;
    // assert ctx.getInstruction() instanceof InvokeStatic == this.method.isStatic();
    if (this.getMethod().isStatic()) {
        this.nonStatic = ctx.getFrame().nonStatic;
    }
    // initialize LVT. the last argument is popped first, and is at arguments[0]
    List<StackContext> pops = ctx.getPops();
    // reverse the list so first argument is at index 0
    pops = Lists.reverse(new ArrayList<>(pops));
    int lvtOffset = 0;
    if (!(ctx.getInstruction() instanceof InvokeStatic)) {
        // object
        StackContext s = pops.remove(0);
        // but don't set as a parameter
        if (!method.isStatic()) {
            VariableContext vctx = new VariableContext(ctx, s);
            vctx.markParameter();
            variables.set(lvtOffset++, vctx);
        }
    }
    for (int i = 0; i < method.getDescriptor().size(); ++i) {
        StackContext argument = pops.remove(0);
        // Set variable type to the methods,  not the objects on the stack.
        VariableContext vctx = new VariableContext(ctx, method.getDescriptor().getTypeOfArg(i), argument.getValue());
        vctx.markParameter();
        variables.set(lvtOffset, vctx);
        lvtOffset += method.getDescriptor().getTypeOfArg(i).getSize();
    }
    assert pops.isEmpty();
    Code code = method.getCode();
    cur = code.getInstructions().getInstructions().get(0);
}

Example 25 with Code

use of net.runelite.asm.attributes.Code in project runelite by runelite.

the class MixinInjector method injectMethods.

private void injectMethods(ClassFile mixinCf, ClassFile cf, Map<net.runelite.asm.pool.Field, Field> shadowFields) throws InjectionException {
    // Keeps mappings between methods annotated with @Copy -> the copied method within the vanilla pack
    Map<net.runelite.asm.pool.Method, CopiedMethod> copiedMethods = new HashMap<>();
    // Handle the copy mixins first, so all other mixins know of the copies
    for (Method method : mixinCf.getMethods()) {
        Annotation copyAnnotation = method.getAnnotations().find(COPY);
        if (copyAnnotation == null) {
            continue;
        }
        String deobMethodName = (String) copyAnnotation.getElement().getValue();
        ClassFile deobCf = inject.toDeobClass(cf);
        Method deobMethod = findDeobMethod(deobCf, deobMethodName, method.getDescriptor());
        if (deobMethod == null) {
            throw new InjectionException("Failed to find the deob method " + deobMethodName + " for mixin " + mixinCf);
        }
        if (method.isStatic() != deobMethod.isStatic()) {
            throw new InjectionException("Mixin method " + method + " should be " + (deobMethod.isStatic() ? "static" : "non-static"));
        }
        // Find the vanilla class where the method to copy is in
        String obClassName = DeobAnnotations.getObfuscatedName(deobMethod.getClassFile().getAnnotations());
        ClassFile obCf = inject.getVanilla().findClass(obClassName);
        assert obCf != null : "unable to find vanilla class from obfuscated name " + obClassName;
        String obMethodName = DeobAnnotations.getObfuscatedName(deobMethod.getAnnotations());
        Signature obMethodSignature = DeobAnnotations.getObfuscatedSignature(deobMethod);
        if (obMethodName == null) {
            obMethodName = deobMethod.getName();
        }
        if (obMethodSignature == null) {
            obMethodSignature = deobMethod.getDescriptor();
        }
        Method obMethod = obCf.findMethod(obMethodName, obMethodSignature);
        if (obMethod == null) {
            throw new InjectionException("Failed to find the ob method " + obMethodName + " for mixin " + mixinCf);
        }
        if (method.getDescriptor().size() > obMethod.getDescriptor().size()) {
            throw new InjectionException("Mixin methods cannot have more parameters than their corresponding ob method");
        }
        Method copy = new Method(cf, "copy$" + deobMethodName, obMethodSignature);
        moveCode(copy, obMethod.getCode());
        copy.setAccessFlags(obMethod.getAccessFlags());
        copy.setPublic();
        copy.getExceptions().getExceptions().addAll(obMethod.getExceptions().getExceptions());
        copy.getAnnotations().getAnnotations().addAll(obMethod.getAnnotations().getAnnotations());
        cf.addMethod(copy);
        /*
				If the desc for the mixin method and the desc for the ob method
				are the same in length, assume that the mixin method is taking
				care of the garbage parameter itself.
			 */
        boolean hasGarbageValue = method.getDescriptor().size() != obMethod.getDescriptor().size() && deobMethod.getDescriptor().size() < obMethodSignature.size();
        copiedMethods.put(method.getPoolMethod(), new CopiedMethod(copy, hasGarbageValue));
        logger.debug("Injected copy of {} to {}", obMethod, copy);
    }
    // Handle the rest of the mixin types
    for (Method method : mixinCf.getMethods()) {
        boolean isClinit = "<clinit>".equals(method.getName());
        boolean isInit = "<init>".equals(method.getName());
        boolean hasInject = method.getAnnotations().find(INJECT) != null;
        // You can't annotate clinit, so its always injected
        if ((hasInject && isInit) || isClinit) {
            if (!"()V".equals(method.getDescriptor().toString())) {
                throw new InjectionException("Injected constructors cannot have arguments");
            }
            Method[] originalMethods = cf.getMethods().stream().filter(n -> n.getName().equals(method.getName())).toArray(Method[]::new);
            // If there isn't a <clinit> already just inject ours, otherwise rename it
            // This is always true for <init>
            String name = method.getName();
            if (originalMethods.length > 0) {
                name = "rl$$" + (isInit ? "init" : "clinit");
            }
            String numberlessName = name;
            for (int i = 1; cf.findMethod(name, method.getDescriptor()) != null; i++) {
                name = numberlessName + i;
            }
            Method copy = new Method(cf, name, method.getDescriptor());
            moveCode(copy, method.getCode());
            copy.setAccessFlags(method.getAccessFlags());
            copy.setPrivate();
            assert method.getExceptions().getExceptions().isEmpty();
            // Remove the call to the superclass's ctor
            if (isInit) {
                Instructions instructions = copy.getCode().getInstructions();
                ListIterator<Instruction> listIter = instructions.getInstructions().listIterator();
                for (; listIter.hasNext(); ) {
                    Instruction instr = listIter.next();
                    if (instr instanceof InvokeSpecial) {
                        InvokeSpecial invoke = (InvokeSpecial) instr;
                        assert invoke.getMethod().getName().equals("<init>");
                        listIter.remove();
                        int pops = invoke.getMethod().getType().getArguments().size() + 1;
                        for (int i = 0; i < pops; i++) {
                            listIter.add(new Pop(instructions));
                        }
                        break;
                    }
                }
            }
            setOwnersToTargetClass(mixinCf, cf, copy, shadowFields, copiedMethods);
            cf.addMethod(copy);
            // Call our method at the return point of the matching method(s)
            for (Method om : originalMethods) {
                Instructions instructions = om.getCode().getInstructions();
                ListIterator<Instruction> listIter = instructions.getInstructions().listIterator();
                for (; listIter.hasNext(); ) {
                    Instruction instr = listIter.next();
                    if (instr instanceof ReturnInstruction) {
                        listIter.previous();
                        if (isInit) {
                            listIter.add(new ALoad(instructions, 0));
                            listIter.add(new InvokeSpecial(instructions, copy.getPoolMethod()));
                        } else if (isClinit) {
                            listIter.add(new InvokeStatic(instructions, copy.getPoolMethod()));
                        }
                        listIter.next();
                    }
                }
            }
            logger.debug("Injected mixin method {} to {}", copy, cf);
        } else if (hasInject) {
            // Make sure the method doesn't invoke copied methods
            for (Instruction i : method.getCode().getInstructions().getInstructions()) {
                if (i instanceof InvokeInstruction) {
                    InvokeInstruction ii = (InvokeInstruction) i;
                    if (copiedMethods.containsKey(ii.getMethod())) {
                        throw new InjectionException("Injected methods cannot invoke copied methods");
                    }
                }
            }
            Method copy = new Method(cf, method.getName(), method.getDescriptor());
            moveCode(copy, method.getCode());
            copy.setAccessFlags(method.getAccessFlags());
            copy.setPublic();
            assert method.getExceptions().getExceptions().isEmpty();
            setOwnersToTargetClass(mixinCf, cf, copy, shadowFields, copiedMethods);
            cf.addMethod(copy);
            logger.debug("Injected mixin method {} to {}", copy, cf);
        } else if (method.getAnnotations().find(REPLACE) != null) {
            Annotation replaceAnnotation = method.getAnnotations().find(REPLACE);
            String deobMethodName = (String) replaceAnnotation.getElement().getValue();
            ClassFile deobCf = inject.toDeobClass(cf);
            Method deobMethod = findDeobMethod(deobCf, deobMethodName, method.getDescriptor());
            if (deobMethod == null) {
                throw new InjectionException("Failed to find the deob method " + deobMethodName + " for mixin " + mixinCf);
            }
            if (method.isStatic() != deobMethod.isStatic()) {
                throw new InjectionException("Mixin method " + method + " should be " + (deobMethod.isStatic() ? "static" : "non-static"));
            }
            String obMethodName = DeobAnnotations.getObfuscatedName(deobMethod.getAnnotations());
            Signature obMethodSignature = DeobAnnotations.getObfuscatedSignature(deobMethod);
            // Deob signature is the same as ob signature
            if (obMethodName == null) {
                obMethodName = deobMethod.getName();
            }
            if (obMethodSignature == null) {
                obMethodSignature = deobMethod.getDescriptor();
            }
            // Find the vanilla class where the method to copy is in
            String obClassName = DeobAnnotations.getObfuscatedName(deobMethod.getClassFile().getAnnotations());
            ClassFile obCf = inject.getVanilla().findClass(obClassName);
            Method obMethod = obCf.findMethod(obMethodName, obMethodSignature);
            assert obMethod != null : "obfuscated method " + obMethodName + obMethodSignature + " does not exist";
            if (method.getDescriptor().size() > obMethod.getDescriptor().size()) {
                throw new InjectionException("Mixin methods cannot have more parameters than their corresponding ob method");
            }
            Type returnType = method.getDescriptor().getReturnValue();
            Type deobReturnType = inject.apiTypeToDeobfuscatedType(returnType);
            if (!returnType.equals(deobReturnType)) {
                ClassFile deobReturnTypeClassFile = inject.getDeobfuscated().findClass(deobReturnType.getInternalName());
                if (deobReturnTypeClassFile != null) {
                    ClassFile obReturnTypeClass = inject.toObClass(deobReturnTypeClassFile);
                    Instructions instructions = method.getCode().getInstructions();
                    ListIterator<Instruction> listIter = instructions.getInstructions().listIterator();
                    for (; listIter.hasNext(); ) {
                        Instruction instr = listIter.next();
                        if (instr instanceof ReturnInstruction) {
                            listIter.previous();
                            CheckCast checkCast = new CheckCast(instructions);
                            checkCast.setType(new Type(obReturnTypeClass.getName()));
                            listIter.add(checkCast);
                            listIter.next();
                        }
                    }
                }
            }
            moveCode(obMethod, method.getCode());
            boolean hasGarbageValue = method.getDescriptor().size() != obMethod.getDescriptor().size() && deobMethod.getDescriptor().size() < obMethodSignature.size();
            if (hasGarbageValue) {
                int garbageIndex = obMethod.isStatic() ? obMethod.getDescriptor().size() - 1 : obMethod.getDescriptor().size();
                /*
						If the mixin method doesn't have the garbage parameter,
						the compiler will have produced code that uses the garbage
						parameter's local variable index for other things,
						so we'll have to add 1 to all loads/stores to indices
						that are >= garbageIndex.
					 */
                shiftLocalIndices(obMethod.getCode().getInstructions(), garbageIndex);
            }
            setOwnersToTargetClass(mixinCf, cf, obMethod, shadowFields, copiedMethods);
            logger.debug("Replaced method {} with mixin method {}", obMethod, method);
        }
    }
}