Example usage for org.objectweb.asm.tree ClassNode ClassNode

List of usage examples for org.objectweb.asm.tree ClassNode ClassNode

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Introduction

In this page you can find the example usage for org.objectweb.asm.tree ClassNode ClassNode.

Prototype

public ClassNode()

Source Link

Document

Constructs a new ClassNode .

Usage

From source file:net.minecrell.quartz.plugin.QuartzPluginManager.java

License:MIT License

@Nullable
private String findPlugin(InputStream in) throws IOException {
    ClassReader reader = new ClassReader(in);
    ClassNode classNode = new ClassNode();
    reader.accept(classNode, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES);

    if (classNode.visibleAnnotations != null) {
        for (AnnotationNode node : classNode.visibleAnnotations) {
            if (node.desc.equals(PLUGIN_DESCRIPTOR)) {
                return classNode.name.replace('/', '.');
            }/*from   w w w  . j  a v  a 2 s. c om*/
        }
    }

    return null;
}

From source file:net.orfjackal.retrolambda.Transformers.java

License:Open Source License

public List<byte[]> backportInterface(ClassReader reader) {
    // The lambdas must be backported only once, because bad things will happen if a lambda
    // is called by different class name in the interface and its companion class, and then
    // the wrong one of them is written to disk last.
    ClassNode lambdasBackported = new ClassNode();
    ClassVisitor next = lambdasBackported;
    next = new BackportLambdaInvocations(next, analyzer);
    reader.accept(next, 0);//from  w  ww.  j  av a2  s . c o m

    List<byte[]> results = new ArrayList<>();
    results.add(backportInterface2(lambdasBackported));
    results.addAll(extractInterfaceCompanion(lambdasBackported));
    return results;
}

From source file:net.petercashel.jmsDd.util.ASMTransformer.java

License:Apache License

public static byte[] transform(String name, byte[] bytes) {
    if (debug)// w w w . ja va 2 s  .c  o m
        System.out.println(bytes.length);
    ClassNode classNode = new ClassNode();
    String classNameASM = name.replace('.', '/');
    ClassReader classReader = new ClassReader(bytes);
    classReader.accept(classNode, 0);
    boolean DoModInit = false;
    boolean HasInit = false;
    String initDesc = "()V";
    boolean lockDesc = false;

    try {
        try {
            for (int i = 0; i < classNode.visibleAnnotations.size(); i++) {
                AnnotationNode ann = (AnnotationNode) classNode.visibleAnnotations.get(i);
                if (ann.desc.equalsIgnoreCase("Lnet/petercashel/jmsDd/module/Module;")) {
                    try {
                        if (debug)
                            System.out.println("ANNOTE!");
                        DoModInit = true;
                        Map<String, Object> values = asmList2Map(ann.values);
                        ModuleSystem.modulesToLoad.put(
                                values.get("ModuleName").toString().replace("[", "").replace("]", ""),
                                classNode.name.replace("/", "."));
                    } catch (Exception e) {
                        e.printStackTrace();

                    }
                }
            }
        } catch (Exception e) {
        }

        try {
            if (DoModInit) {

                for (int i = 0; i < classNode.methods.size(); i++) {
                    MethodNode m = (MethodNode) classNode.methods.get(i);
                    if (m.name.contentEquals("<init>")) {
                        initDesc = m.desc;
                        if (m.desc.contentEquals("()V")) {
                            HasInit = true;
                            if (debug)
                                System.out.println("Found <init>");
                        }
                    }
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    if (debug)
        System.out.println("Still alive?");
    try {

        //          L0
        //             LINENUMBER 43 L0
        //             ALOAD 0
        //             INVOKESPECIAL // CLASSNAME FOR ASM  // ()V    ////// This is effectically a super() call but to the discovered constructor
        //            L1
        //             LINENUMBER 44 L1
        //             INVOKESTATIC net/petercashel/jmsDd/API/API$Impl.getAPI ()Lnet/petercashel/jmsDd/API/API;
        //             ALOAD 0
        //             INVOKEINTERFACE net/petercashel/jmsDd/API/API.registerEventBus (Ljava/lang/Object;)V
        //            L2
        //             LINENUMBER 46 L2
        //             RETURN
        //            L3
        //             LOCALVARIABLE this // "L" + CLASSNAME FOR ASM + ";" // L0 L3 0
        //             LOCALVARIABLE e Lnet/petercashel/jmsDd/event/module/DummyEvent; L0 L3 1
        //             MAXSTACK = 2
        //             MAXLOCALS = 2
        if (DoModInit) {
            if (HasInit) {
                if (debug)
                    System.out.println("Adding Extra Constructor to " + name);
                MethodNode constructor = new MethodNode(Opcodes.ACC_PUBLIC, "<init>",
                        "(Lnet/petercashel/jmsDd/event/module/DummyEvent;)V", null, null);

                Label L0 = new Label();
                constructor.visitLabel(L0);
                constructor.visitVarInsn(Opcodes.ALOAD, 0);
                constructor.visitMethodInsn(Opcodes.INVOKESPECIAL, classNameASM, "<init>", initDesc);

                Label L1 = new Label();
                constructor.visitLabel(L1);
                constructor.visitMethodInsn(Opcodes.INVOKESTATIC, "net/petercashel/jmsDd/API/API$Impl",
                        "getAPI", "()Lnet/petercashel/jmsDd/API/API;");
                constructor.visitVarInsn(Opcodes.ALOAD, 0);
                constructor.visitMethodInsn(Opcodes.INVOKEINTERFACE, "net/petercashel/jmsDd/API/API",
                        "registerEventBus", "(Ljava/lang/Object;)V");

                Label L2 = new Label();
                constructor.visitLabel(L2);
                constructor.visitInsn(Opcodes.RETURN);

                Label L3 = new Label();
                constructor.visitLabel(L3);
                constructor.visitLocalVariable("this", "L" + classNameASM + ";", null, L0, L3, 0);
                constructor.visitLocalVariable("e", "Lnet/petercashel/jmsDd/event/module/DummyEvent;", null, L0,
                        L3, 1);
                constructor.visitMaxs(2, 2);
                constructor.visitEnd();
                classNode.methods.add(constructor);

            } else {
                System.err.println("WARNING! " + name
                        + " Doesn't have a default no-args constructor.  Module loader cannot chain load the constructor. \n If you are recieving this error and your module has no constructors defined, or a no-args constructor defined, \n please report the bug to the author of JMSDd.");
                MethodNode constructor = new MethodNode(Opcodes.ACC_PUBLIC, "<init>",
                        "(Lnet/petercashel/jmsDd/event/module/DummyEvent;)V", null, null);

                Label L0 = new Label();
                constructor.visitLabel(L0);
                constructor.visitVarInsn(Opcodes.ALOAD, 0);
                //INVOKESPECIAL java/lang/Object.<init> ()V ////// There is no other constructor, call super() to Object.
                constructor.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");

                Label L1 = new Label();
                constructor.visitLabel(L1);
                constructor.visitMethodInsn(Opcodes.INVOKESTATIC, "net/petercashel/jmsDd/API/API$Impl",
                        "getAPI", "()Lnet/petercashel/jmsDd/API/API;");
                constructor.visitVarInsn(Opcodes.ALOAD, 0);
                constructor.visitMethodInsn(Opcodes.INVOKEINTERFACE, "net/petercashel/jmsDd/API/API",
                        "registerEventBus", "(Ljava/lang/Object;)V");

                Label L2 = new Label();
                constructor.visitLabel(L2);
                constructor.visitInsn(Opcodes.RETURN);

                Label L3 = new Label();
                constructor.visitLabel(L3);
                constructor.visitLocalVariable("this", "L" + classNameASM + ";", null, L0, L3, 0);
                constructor.visitLocalVariable("e", "Lnet/petercashel/jmsDd/event/module/DummyEvent;", null, L0,
                        L3, 1);
                constructor.visitMaxs(2, 2);
                constructor.visitEnd();
                classNode.methods.add(constructor);
            }
            classNode.visitEnd();
            ClassWriter wr = new ClassWriter(0);
            classNode.accept(wr);

            bytes = wr.toByteArray();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    if (debug)
        System.out.println("Still alive.");
    if (debug)
        System.out.println(bytes.length);
    if (plugins.size() > 0) {
        for (ASMPlugin p : plugins) {
            try {
                bytes = p.transform(name, bytes);
            } catch (Exception e) {

            }
        }
    }

    return bytes;
}

From source file:net.rim.ejde.internal.launching.MDSCSChecker.java

License:Open Source License

private static String getMDSCSVersion(InputStream inputStream) {
    _currentVersion = null; // reset the value
    try {/*  ww w  .j a v a 2 s .co  m*/
        ClassReader classReader = new ClassReader(inputStream);
        ClassNode myVisitor = new ClassNode() {
            public FieldVisitor visitField(int access, String name, String desc, String signature,
                    Object value) {
                if (value instanceof String) {
                    String[] parts = ((String) value).split("\\.");
                    if (parts.length > 2) {
                        _currentVersion = (String) value;
                    }
                }
                return super.visitField(access, name, desc, signature, value);
            }
        };
        classReader.accept(myVisitor, ClassReader.SKIP_FRAMES);
    } catch (Throwable ex) {
        _logger.error("", ex);
    }
    return _currentVersion;
}

From source file:net.roryclaasen.asm.rorysmodcore.transformer.EntityPlayerTransformer.java

License:Apache License

public byte[] patchOnUpdate(String name, byte[] bytes, boolean obfuscated) {
    RMLog.info("[EntityPlayer] [onUpdate] Patching", true);
    String targetMethodName = "";

    if (obfuscated == true)
        targetMethodName = "h";
    else/*from  w  w  w .  j  av  a2 s .  c  om*/
        targetMethodName = "onUpdate";
    ClassNode classNode = new ClassNode();
    ClassReader classReader = new ClassReader(bytes);
    classReader.accept(classNode, 0);

    Iterator<MethodNode> methods = classNode.methods.iterator();
    while (methods.hasNext()) {
        MethodNode method = methods.next();
        int invok_index = -1;
        if ((method.name.equals(targetMethodName) && method.desc.equals("()V"))) {
            AbstractInsnNode currentNode = null;
            AbstractInsnNode targetNode = null;

            Iterator<AbstractInsnNode> iter = method.instructions.iterator();

            int index = -1;

            int GETFIELD_COUNT = 0;
            while (iter.hasNext()) {
                index++;
                currentNode = iter.next();
                if (currentNode.getOpcode() == Opcodes.GETFIELD) {
                    GETFIELD_COUNT++;
                    if (GETFIELD_COUNT == 13) {
                        targetNode = currentNode;
                        invok_index = index;
                        break;
                    }
                }
            }
            if (targetNode == null || invok_index == -1) {
                RMLog.info("[EntityPlayer] Did not find all necessary target nodes! ABANDON CLASS!", true);
                return bytes;
            }
            /*
             * mv.visitLineNumber(305, l19);
             * mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
             * mv.visitVarInsn(ALOAD, 0);
             * -- mv.visitFieldInsn(GETFIELD, "net/minecraft/entity/player/EntityPlayer", "worldObj", "Lnet/minecraft/world/World;");
             * mv.visitFieldInsn(GETFIELD, "net/minecraft/world/World", "isRemote", "Z");
             * Label l21 = new Label();
             * mv.visitJumpInsn(IFNE, l21);
             */
            @SuppressWarnings("unused")
            AbstractInsnNode p1, p2, p3;
            p1 = method.instructions.get(invok_index - 1); // mv.visitVarInsn(ALOAD, 0);
            p2 = method.instructions.get(invok_index); // mv.visitFieldInsn(GETFIELD, "net/minecraft/entity/player/EntityPlayer", "worldObj", "Lnet/minecraft/world/World;");
            p3 = method.instructions.get(invok_index + 1); // mv.visitFieldInsn(GETFIELD, "net/minecraft/world/World", "isRemote", "Z");

            //method.instructions.remove(p1);
            //method.instructions.remove(p2);
            //method.instructions.remove(p3);

            MethodInsnNode m1 = new MethodInsnNode(Opcodes.INVOKESTATIC,
                    "net/roryclaasen/asm/rorysmodcore/transformer/StaticClass", "shouldWakeUp",
                    "(Lnet/minecraft/entity/player/EntityPlayer;)Z", false);

            method.instructions.set(p2, m1);
            method.instructions.remove(p3);
            break;
        }
    }
    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    classNode.accept(writer);
    return writer.toByteArray();
}

From source file:net.roryclaasen.asm.rorysmodcore.transformer.WorldServerTransformer.java

License:Apache License

public byte[] patchTick(String name, byte[] bytes, boolean obfuscated) {
    RMLog.info("[WorldServer] [tick] Patching", true);
    String targetMethodName = "";

    if (obfuscated == true)
        targetMethodName = "b";
    else//www. j a  va 2s.  c  o m
        targetMethodName = "tick";
    ClassNode classNode = new ClassNode();
    ClassReader classReader = new ClassReader(bytes);
    classReader.accept(classNode, 0);

    Iterator<MethodNode> methods = classNode.methods.iterator();
    while (methods.hasNext()) {
        MethodNode method = methods.next();
        int invok_index = -1;
        if ((method.name.equals(targetMethodName) && method.desc.equals("()V"))) {
            AbstractInsnNode currentNode = null;
            AbstractInsnNode targetNode = null;

            Iterator<AbstractInsnNode> iter = method.instructions.iterator();

            int index = -1;

            int INVOKEVIRTUAL_COUNT = 0;
            while (iter.hasNext()) {
                index++;
                currentNode = iter.next();
                if (currentNode.getOpcode() == Opcodes.INVOKEVIRTUAL) {
                    INVOKEVIRTUAL_COUNT++;
                    if (INVOKEVIRTUAL_COUNT == 9) {
                        targetNode = currentNode;
                        invok_index = index;
                        break;
                    }
                }
            }
            if (targetNode == null || invok_index == -1) {
                RMLog.info("[WorldServer] Did not find all necessary target nodes! ABANDON CLASS!", true);
                return bytes;
            }
            AbstractInsnNode p1 = method.instructions.get(invok_index);
            MethodInsnNode a1 = new MethodInsnNode(Opcodes.INVOKESPECIAL, "net/minecraft/world/WorldServer",
                    "resetRainAndThunder", "()V", false);

            method.instructions.set(p1, a1);
            break;
        }
    }
    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    classNode.accept(writer);
    return writer.toByteArray();
}

From source file:net.roryclaasen.asm.rorysmodcore.transformer.WorldServerTransformer.java

License:Apache License

public byte[] patchWakeAllPlayers(String name, byte[] bytes, boolean obfuscated) {
    RMLog.info("[WorldServer] [wakeAllPlayers] Patching", true);
    String targetMethodName = "";

    if (obfuscated == true)
        targetMethodName = "d";
    else//from w ww . jav a 2 s. c  o m
        targetMethodName = "wakeAllPlayers";

    ClassNode classNode = new ClassNode();
    ClassReader classReader = new ClassReader(bytes);
    classReader.accept(classNode, 0);

    Iterator<MethodNode> methods = classNode.methods.iterator();
    while (methods.hasNext()) {
        MethodNode method = methods.next();
        int invok_index = -1;
        if ((method.name.equals(targetMethodName) && method.desc.equals("()V"))) {
            AbstractInsnNode currentNode = null;
            AbstractInsnNode targetNode = null;

            Iterator<AbstractInsnNode> iter = method.instructions.iterator();
            int index = -1;
            while (iter.hasNext()) {
                index++;
                currentNode = iter.next();
                if (currentNode.getOpcode() == Opcodes.INVOKEVIRTUAL) {
                    invok_index = index;
                    targetNode = currentNode;
                    break;
                }
            }
            if (targetNode == null || invok_index == -1) {
                RMLog.info("[WorldServer] Did not find all necessary target nodes! ABANDON CLASS!", true);
                return bytes;
            }
            AbstractInsnNode p1 = method.instructions.get(invok_index);
            MethodInsnNode p2 = new MethodInsnNode(Opcodes.INVOKESTATIC,
                    "net/roryclaasen/asm/rorysmodcore/transformer/StaticClass", "shouldWakeUp", "()Z", false);

            method.instructions.set(p1, p2);
            method.instructions.remove(method.instructions.get(invok_index - 1));
            break;
        }
    }
    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    classNode.accept(writer);
    return writer.toByteArray();
}

From source file:net.sandius.rembulan.compiler.gen.asm.ASMBytecodeEmitter.java

License:Apache License

public ASMBytecodeEmitter(IRFunc fn, SlotAllocInfo slots, TypeInfo types, DependencyInfo deps,
        CompilerSettings compilerSettings, ClassNameTranslator classNameTranslator, String sourceFile) {

    this.fn = Objects.requireNonNull(fn);
    this.slots = Objects.requireNonNull(slots);
    this.types = Objects.requireNonNull(types);
    this.deps = Objects.requireNonNull(deps);

    this.compilerSettings = Objects.requireNonNull(compilerSettings);
    this.classNameTranslator = Objects.requireNonNull(classNameTranslator);
    this.sourceFile = Objects.requireNonNull(sourceFile);

    classNode = new ClassNode();

    this.fields = new ArrayList<>();

    upvalueFieldNames = new HashMap<>();

    String s = System.getProperty("net.sandius.rembulan.compiler.VerifyAndPrint");
    verifyAndPrint = s != null && "true".equals(s.trim().toLowerCase());
}

From source file:net.signbit.tools.atomizer.ClassRef.java

License:Apache License

private ClassRef(InputStream stream, String jarName) throws IOException {
    this.jarName = jarName;
    fullDependencySet = new HashSet<>();

    ClassReader reader = new ClassReader(stream);
    ClassNode classNode = new ClassNode();
    reader.accept(classNode, 0);//from   w w w .j  a  v  a 2  s.co  m

    String[] packageElements = classNode.name.split("/");
    if (packageElements.length > 1) {
        String[] packageOnly = Arrays.copyOfRange(packageElements, 0, packageElements.length - 1);
        packageName = String.join(".", packageOnly);
    } else {
        packageName = "";
    }
    className = packageElements[packageElements.length - 1];

    fullDependencySet.add(classNode.superName.replace('/', '.'));

    for (Object itf : classNode.interfaces) {
        fullDependencySet.add(((String) itf).replace('/', '.'));
    }

    for (Object mn : classNode.methods) {
        MethodNode methodNode = (MethodNode) mn;

        Type type = Type.getType(methodNode.desc);
        fullDependencySet.add(type.getReturnType().getClassName());
        for (Type argType : type.getArgumentTypes()) {
            fullDependencySet.add(argType.getClassName());
        }

        for (Object oo : methodNode.exceptions) {
            String excClass = (String) oo;
            fullDependencySet.add(excClass.replace('/', '.'));
        }

        if (null != methodNode.localVariables) {
            for (Object lon : methodNode.localVariables) {
                LocalVariableNode localVariableNode = (LocalVariableNode) lon;
                fullDependencySet.add(Type.getType(localVariableNode.desc).getClassName());
            }
        }
    }

    fullDependencySet.remove("void");
    fullDependencySet.remove("long");
    fullDependencySet.remove("int");
    fullDependencySet.remove("boolean");

    // the constructor adds it
    fullDependencySet.remove(packageName + '.' + className);
}

From source file:net.signbit.tools.atomizer.DumpClassReferences.java

License:Apache License

private static void processClass(InputStream stream) throws IOException {
    ClassReader reader = new ClassReader(stream);
    ClassNode classNode = new ClassNode();
    reader.accept(classNode, 0);/*  w ww .j a  va  2 s  . c om*/

    System.out.println("Class: " + classNode.name);
    System.out.println("   Extends: " + classNode.superName);

    for (Object itf : classNode.interfaces) {
        System.out.println("   Implements: " + itf);
    }

    for (Object mn : classNode.methods) {
        MethodNode methodNode = (MethodNode) mn;
        System.out.println("   Method: " + methodNode.name);

        Type type = Type.getType(methodNode.desc);
        System.out.println("      Return: " + type.getReturnType().getClassName());
        for (Type argType : type.getArgumentTypes()) {
            System.out.println("      Param: " + argType.getClassName());
        }

        for (Object oo : methodNode.exceptions) {
            System.out.println("      Throws: " + oo);
        }

        for (Object lon : methodNode.localVariables) {
            LocalVariableNode localVariableNode = (LocalVariableNode) lon;
            System.out.println("      Var: " + Type.getType(localVariableNode.desc).getClassName());
        }
    }

}