Example usage for org.objectweb.asm Opcodes ASTORE

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes ASTORE.

Prototype

int ASTORE

To view the source code for org.objectweb.asm Opcodes ASTORE.

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Usage

From source file:scouter.agent.asm.ServiceASM.java

License:Apache License

@Override
public void visitMaxs(int maxStack, int maxLocals) {
    Label endFinally = new Label();
    mv.visitTryCatchBlock(startFinally, endFinally, endFinally, null);
    mv.visitLabel(endFinally);/*from  w  ww  .  j a v a2 s  .  c om*/
    mv.visitInsn(DUP);
    int errIdx = newLocal(Type.getType(Throwable.class));
    mv.visitVarInsn(Opcodes.ASTORE, errIdx);

    mv.visitVarInsn(Opcodes.ALOAD, statIdx);
    mv.visitInsn(Opcodes.ACONST_NULL);// return
    mv.visitVarInsn(Opcodes.ALOAD, errIdx);
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, TRACEMAIN, END_METHOD, END_SIGNATURE, false);
    mv.visitInsn(ATHROW);
    mv.visitMaxs(maxStack + 8, maxLocals + 2);
}

---

From source file:scouter.agent.asm.SocketASM.java

License:Apache License

public void visitCode() {
    mv.visitVarInsn(Opcodes.ALOAD, 0);/*from www.ja  v  a2  s.c  o  m*/
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, TRACEAPICALL, START_METHOD, START_SIGNATURE, false);

    statIdx = newLocal(Type.getType(Object.class));

    mv.visitVarInsn(Opcodes.ASTORE, statIdx);
    mv.visitLabel(startFinally);
    mv.visitCode();
}

---

From source file:scouter.agent.asm.SocketASM.java

License:Apache License

@Override
public void visitMaxs(int maxStack, int maxLocals) {
    Label endFinally = new Label();
    mv.visitTryCatchBlock(startFinally, endFinally, endFinally, null);
    mv.visitLabel(endFinally);//from   w w w .  j a va2s.c  o m
    mv.visitInsn(DUP);
    int errIdx = newLocal(Type.getType(Throwable.class));
    mv.visitVarInsn(Opcodes.ASTORE, errIdx);

    mv.visitVarInsn(Opcodes.ALOAD, statIdx);
    mv.visitVarInsn(Opcodes.ALOAD, errIdx);
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, TRACEAPICALL, END_METHOD, END_SIGNATURE, false);
    mv.visitInsn(ATHROW);
    mv.visitMaxs(maxStack + 8, maxLocals + 2);
}

---

From source file:serianalyzer.JVMImpl.java

License:Open Source License

/**
 * @param opcode/*from  w w w .  java2s  .c o  m*/
 * @param var
 * @param s
 */
static void handleVarInsn(int opcode, int var, JVMStackState s) {
    Set<BaseType> v;
    switch (opcode) {
    case Opcodes.LLOAD:
    case Opcodes.ILOAD:
    case Opcodes.FLOAD:
    case Opcodes.DLOAD:
    case Opcodes.ALOAD:
        v = s.getVariable(var);
        if (log.isTraceEnabled()) {
            log.trace("LOAD " + opcode + "@" + var + ":" + v); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
        }
        if (v == null || v.isEmpty()) {
            s.push(new BasicVariable(toType(opcode), "unknown " + var, true)); //$NON-NLS-1$
        } else if (v.size() == 1) {
            s.push(v.iterator().next());
        } else {
            Set<BaseType> alts = new HashSet<>();
            for (BaseType o : v) {
                if (o instanceof MultiAlternatives && !((MultiAlternatives) o).getAlternatives().isEmpty()) {
                    alts.addAll(((MultiAlternatives) o).getAlternatives());
                } else {
                    alts.add(o);
                }
            }
            s.push(new MultiAlternatives(alts));
        }
        break;
    case Opcodes.LSTORE:
    case Opcodes.ISTORE:
    case Opcodes.FSTORE:
    case Opcodes.DSTORE:
    case Opcodes.ASTORE:
        s.getVariable(var).add(s.pop());
        break;
    case Opcodes.RET:
        break;
    default:
        log.warn("Unimplemented opcode " + opcode); //$NON-NLS-1$
    }
}

---

From source file:sg.atom.core.actor.internal.codegenerator.ActorProxyCreator.java

License:Apache License

/**
 * Writes a proxy method for messages./*from w w  w  .  j  av a 2s  . c om*/
 *
 * @param classNameInternal the internal class name
 * @param classNameDescriptor the class name descriptor
 * @param cw the ClassWriter
 * @param index the message index
 * @param type the ActorState type to use
 * @param concurrencyModel the concurrency model of the message
 * @param messageDescriptor the message's descriptor
 * @param method the method to override
 * @param simpleDescriptor a simple descriptor of the message
 * @param genericSignature the signature of the message
 */
private static void writeProxyMethod(String classNameInternal, String classNameDescriptor, ClassWriter cw,
        int index, Type actorState, ConcurrencyModel concurrencyModel, MessageImplDescriptor messageDescriptor,
        Method method, String simpleDescriptor, String genericSignature) throws NoSuchMethodException {
    MethodVisitor mv;
    {
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, method.getName(), simpleDescriptor, genericSignature, null);
        mv.visitCode();
        Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitIntInsn(Opcodes.BIPUSH, method.getParameterTypes().length);
        mv.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/Object");
        for (int j = 0; j < method.getParameterTypes().length; j++) {
            mv.visitInsn(Opcodes.DUP);
            mv.visitIntInsn(Opcodes.BIPUSH, j);
            Class<?> paraType = method.getParameterTypes()[j];
            if (paraType.isPrimitive()) {
                String wrapperClass = GenerationUtils.getWrapperInternalName(paraType);
                Type primType = Type.getType(paraType);
                mv.visitVarInsn(primType.getOpcode(Opcodes.ILOAD), j + 1);
                mv.visitMethodInsn(Opcodes.INVOKESTATIC, wrapperClass, "valueOf",
                        "(" + primType.getDescriptor() + ")" + "L" + wrapperClass + ";");
            } else if (isArgumentFreezingRequired(method, j, paraType)) {
                mv.visitVarInsn(Opcodes.ALOAD, j + 1);
                mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(SerializableFreezer.class),
                        "freeze",
                        Type.getMethodDescriptor(SerializableFreezer.class.getMethod("freeze", Object.class)));
            } else if (paraType.isInterface()) {
                mv.visitVarInsn(Opcodes.ALOAD, j + 1);
                mv.visitInsn(Opcodes.DUP);
                mv.visitTypeInsn(Opcodes.INSTANCEOF, "org/actorsguildframework/Actor");
                Label lEndif = new Label();
                mv.visitJumpInsn(Opcodes.IFNE, lEndif);
                mv.visitTypeInsn(Opcodes.NEW, Type.getInternalName(ActorRuntimeException.class));
                mv.visitInsn(Opcodes.DUP);
                mv.visitLdcInsn(String.format(
                        "Argument %d is an non-Serializable interface, but you did not give an Actor. If a message's argument type is an interface that does not extend Serializable, only Actors are acceptable as argument.",
                        j));
                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(ActorRuntimeException.class),
                        "<init>", "(Ljava/lang/String;)V");
                mv.visitInsn(Opcodes.ATHROW);
                mv.visitLabel(lEndif);
            } else {
                mv.visitVarInsn(Opcodes.ALOAD, j + 1);
            }

            mv.visitInsn(Opcodes.AASTORE);
        }
        Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitVarInsn(Opcodes.ASTORE, method.getParameterTypes().length + 1); // method.getParameterTypes().length+1 ==> 'args' local variable
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, classNameInternal, "actorState__ACTORPROXY",
                actorState.getDescriptor());
        mv.visitFieldInsn(Opcodes.GETSTATIC, classNameInternal,
                String.format(MESSAGE_CALLER_NAME_FORMAT, index),
                "Lorg/actorsguildframework/internal/MessageCaller;");
        mv.visitFieldInsn(Opcodes.GETSTATIC, "org/actorsguildframework/annotations/ThreadUsage",
                messageDescriptor.getThreadUsage().name(),
                "Lorg/actorsguildframework/annotations/ThreadUsage;");
        mv.visitVarInsn(Opcodes.ALOAD, method.getParameterTypes().length + 1);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, actorState.getInternalName(), "queueMessage",
                "(Lorg/actorsguildframework/internal/MessageCaller;Lorg/actorsguildframework/annotations/ThreadUsage;[Ljava/lang/Object;)Lorg/actorsguildframework/internal/AsyncResultImpl;");
        mv.visitInsn(Opcodes.ARETURN);
        Label l4 = new Label();
        mv.visitLabel(l4);
        mv.visitLocalVariable("this", classNameDescriptor, null, l0, l4, 0);
        for (int j = 0; j < method.getParameterTypes().length; j++) {
            mv.visitLocalVariable("arg" + j, Type.getDescriptor(method.getParameterTypes()[j]),
                    GenericTypeHelper.getSignatureIfGeneric(method.getGenericParameterTypes()[j]), l0, l4,
                    j + 1);
        }
        mv.visitLocalVariable("args", "[Ljava/lang/Object;", null, l1, l4,
                method.getParameterTypes().length + 1);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
}

---

From source file:sg.atom.core.actor.internal.codegenerator.BeanCreator.java

License:Apache License

/**
 * Writes the bean constructor to the given ClassWriter.
 *
 * @param beanClass the original bean class to extend
 * @param bcd the descriptor of the bean
 * @param classNameInternal the internal name of the new class
 * @param cw the ClassWriter to write to
 * @param snippetWriter if not null, this will be invoked to add a snippet
 * after the invocation of the super constructor
 *//*from w  w w . ja v  a 2 s . co m*/
public static void writeConstructor(Class<?> beanClass, BeanClassDescriptor bcd, String classNameInternal,
        ClassWriter cw, SnippetWriter snippetWriter) {
    String classNameDescriptor = "L" + classNameInternal + ";";

    int localPropertySize = 0;
    ArrayList<PropertyDescriptor> localVarProperties = new ArrayList<PropertyDescriptor>();
    for (int i = 0; i < bcd.getPropertyCount(); i++) {
        PropertyDescriptor pd = bcd.getProperty(i);
        if (pd.getPropertySource().isGenerating() || (pd.getDefaultValue() != null)) {
            localVarProperties.add(pd);
            localPropertySize += Type.getType(pd.getPropertyClass()).getSize();
        }
    }

    final int locVarThis = 0;
    final int locVarController = 1;
    final int locVarProps = 2;
    final int locVarPropertiesOffset = 3;
    final int locVarP = 3 + localPropertySize;
    final int locVarK = 4 + localPropertySize;
    final int locVarV = 5 + localPropertySize;

    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>",
            "(Lorg/actorsguildframework/internal/Controller;Lorg/actorsguildframework/Props;)V", null, null);
    mv.visitCode();
    Label lTry = new Label();
    Label lCatch = new Label();
    mv.visitTryCatchBlock(lTry, lCatch, lCatch, "java/lang/ClassCastException");

    Label lBegin = new Label();
    mv.visitLabel(lBegin);
    mv.visitVarInsn(Opcodes.ALOAD, locVarThis);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(beanClass), "<init>", "()V");

    if (snippetWriter != null) {
        snippetWriter.write(mv);
    }

    Label lPropertyInit = new Label();
    mv.visitLabel(lPropertyInit);
    // load default values into the local variables for each property that must be set
    int varCount = 0;
    for (PropertyDescriptor pd : localVarProperties) {
        Type pt = Type.getType(pd.getPropertyClass());
        if (pd.getDefaultValue() != null) {
            mv.visitFieldInsn(Opcodes.GETSTATIC, Type.getInternalName(pd.getDefaultValue().getDeclaringClass()),
                    pd.getDefaultValue().getName(), Type.getDescriptor(pd.getDefaultValue().getType()));
        } else {
            GenerationUtils.generateLoadDefault(mv, pd.getPropertyClass());
        }
        mv.visitVarInsn(pt.getOpcode(Opcodes.ISTORE), locVarPropertiesOffset + varCount);
        varCount += pt.getSize();
    }

    // loop through the props argument's list
    mv.visitVarInsn(Opcodes.ALOAD, locVarProps);
    mv.visitVarInsn(Opcodes.ASTORE, locVarP);
    Label lWhile = new Label();
    Label lEndWhile = new Label();
    Label lWhileBody = new Label();
    mv.visitLabel(lWhile);
    mv.visitJumpInsn(Opcodes.GOTO, lEndWhile);
    mv.visitLabel(lWhileBody);

    mv.visitVarInsn(Opcodes.ALOAD, locVarP);
    mv.visitInsn(Opcodes.DUP);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "org/actorsguildframework/Props", "getKey",
            "()Ljava/lang/String;");
    mv.visitVarInsn(Opcodes.ASTORE, locVarK);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "org/actorsguildframework/Props", "getValue",
            "()Ljava/lang/Object;");
    mv.visitVarInsn(Opcodes.ASTORE, locVarV);

    mv.visitLabel(lTry);
    // write an if for each property
    Label lEndIf = new Label();
    varCount = 0;
    int ifCount = 0;
    for (int i = 0; i < bcd.getPropertyCount(); i++) {
        PropertyDescriptor pd = bcd.getProperty(i);
        boolean usesLocal = pd.getPropertySource().isGenerating() || (pd.getDefaultValue() != null);
        Class<?> propClass = pd.getPropertyClass();
        Type pt = Type.getType(propClass);
        mv.visitVarInsn(Opcodes.ALOAD, locVarK);
        mv.visitLdcInsn(pd.getName());
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z");
        Label lElse = new Label();
        mv.visitJumpInsn(Opcodes.IFEQ, lElse);

        if (!usesLocal) {
            mv.visitVarInsn(Opcodes.ALOAD, locVarThis); // for setter invocation, load 'this'
        }
        if (propClass.isPrimitive()) {
            mv.visitLdcInsn(pd.getName());
            mv.visitVarInsn(Opcodes.ALOAD, locVarV);
            mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(BeanHelper.class),
                    String.format("get%s%sFromPropValue",
                            propClass.getName().substring(0, 1).toUpperCase(Locale.US),
                            propClass.getName().substring(1)),
                    "(Ljava/lang/String;Ljava/lang/Object;)" + pt.getDescriptor());
        } else if (!propClass.equals(Object.class)) {
            mv.visitVarInsn(Opcodes.ALOAD, locVarV);
            mv.visitTypeInsn(Opcodes.CHECKCAST, pt.getInternalName());
        } else {
            mv.visitVarInsn(Opcodes.ALOAD, locVarV);
        }

        if (!usesLocal) {
            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classNameInternal, pd.getSetter().getName(),
                    Type.getMethodDescriptor(pd.getSetter()));
        } else {
            mv.visitVarInsn(pt.getOpcode(Opcodes.ISTORE), varCount + locVarPropertiesOffset);
        }

        mv.visitJumpInsn(Opcodes.GOTO, lEndIf);
        mv.visitLabel(lElse);

        ifCount++;
        if (usesLocal) {
            varCount += pt.getSize();
        }
    }

    // else (==> if not prop matched) throw IllegalArgumentException
    mv.visitTypeInsn(Opcodes.NEW, Type.getInternalName(IllegalArgumentException.class));
    mv.visitInsn(Opcodes.DUP);
    mv.visitLdcInsn("Unknown property \"%s\".");
    mv.visitInsn(Opcodes.ICONST_1);
    mv.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/Object");
    mv.visitInsn(Opcodes.DUP);
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitVarInsn(Opcodes.ALOAD, locVarK);
    mv.visitInsn(Opcodes.AASTORE);
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/String", "format",
            "(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;");
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(IllegalArgumentException.class), "<init>",
            "(Ljava/lang/String;)V");
    mv.visitInsn(Opcodes.ATHROW);

    mv.visitLabel(lCatch);
    mv.visitInsn(Opcodes.POP); // pop the exception object (not needed)
    mv.visitTypeInsn(Opcodes.NEW, Type.getInternalName(IllegalArgumentException.class));
    mv.visitInsn(Opcodes.DUP);
    mv.visitLdcInsn("Incompatible type for property \"%s\". Got %s.");
    mv.visitInsn(Opcodes.ICONST_2);
    mv.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/Object");
    mv.visitInsn(Opcodes.DUP);
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitVarInsn(Opcodes.ALOAD, locVarK);
    mv.visitInsn(Opcodes.AASTORE);
    mv.visitInsn(Opcodes.DUP);
    mv.visitInsn(Opcodes.ICONST_1);
    mv.visitVarInsn(Opcodes.ALOAD, locVarV);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;");
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Class", "getName", "()Ljava/lang/String;");
    mv.visitInsn(Opcodes.AASTORE);
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/String", "format",
            "(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;");
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(IllegalArgumentException.class), "<init>",
            "(Ljava/lang/String;)V");
    mv.visitInsn(Opcodes.ATHROW);

    mv.visitLabel(lEndIf);
    mv.visitVarInsn(Opcodes.ALOAD, locVarP);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "org/actorsguildframework/Props", "tail",
            "()Lorg/actorsguildframework/Props;");
    mv.visitVarInsn(Opcodes.ASTORE, locVarP);

    mv.visitLabel(lEndWhile);
    mv.visitVarInsn(Opcodes.ALOAD, locVarP);
    mv.visitJumpInsn(Opcodes.IFNONNULL, lWhileBody);

    // write local variables back into properties 
    varCount = 0;
    for (PropertyDescriptor pd : localVarProperties) {
        Type pt = Type.getType(pd.getPropertyClass());
        mv.visitVarInsn(Opcodes.ALOAD, locVarThis);
        if (pd.getPropertySource() == PropertySource.ABSTRACT_METHOD) {
            mv.visitVarInsn(pt.getOpcode(Opcodes.ILOAD), locVarPropertiesOffset + varCount);
            mv.visitFieldInsn(Opcodes.PUTFIELD, classNameInternal,
                    String.format(PROP_FIELD_NAME_TEMPLATE, pd.getName()), pt.getDescriptor());
        } else if (pd.getPropertySource() == PropertySource.USER_WRITTEN) {
            mv.visitVarInsn(pt.getOpcode(Opcodes.ILOAD), locVarPropertiesOffset + varCount);
            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classNameInternal, pd.getSetter().getName(),
                    Type.getMethodDescriptor(pd.getSetter()));
        } else {
            throw new RuntimeException("Internal error");
        }
        varCount += pt.getSize();
    }

    // if bean is thread-safe, publish all writes now
    if (bcd.isThreadSafe()) {
        mv.visitVarInsn(Opcodes.ALOAD, locVarThis);
        mv.visitInsn(Opcodes.DUP);
        mv.visitInsn(Opcodes.MONITORENTER);
        mv.visitInsn(Opcodes.MONITOREXIT);
    }

    mv.visitInsn(Opcodes.RETURN);
    Label lEnd = new Label();
    mv.visitLabel(lEnd);

    mv.visitLocalVariable("this", classNameDescriptor, null, lBegin, lEnd, locVarThis);
    mv.visitLocalVariable("controller", "Lorg/actorsguildframework/internal/Controller;", null, lBegin, lEnd,
            locVarController);
    mv.visitLocalVariable("props", "Lorg/actorsguildframework/Props;", null, lBegin, lEnd, locVarProps);
    varCount = 0;
    for (PropertyDescriptor pd : localVarProperties) {
        Type pt = Type.getType(pd.getPropertyClass());
        mv.visitLocalVariable("__" + pd.getName(), pt.getDescriptor(),
                GenericTypeHelper.getSignature(pd.getPropertyType()), lPropertyInit, lEnd,
                locVarPropertiesOffset + varCount);
        varCount += pt.getSize();
    }
    mv.visitLocalVariable("p", "Lorg/actorsguildframework/Props;", null, lPropertyInit, lEnd, locVarP);
    mv.visitLocalVariable("k", "Ljava/lang/String;", null, lWhile, lEndWhile, locVarK);
    mv.visitLocalVariable("v", "Ljava/lang/Object;", null, lWhile, lEndWhile, locVarV);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

---

From source file:vazkii.quark.base.asm.ClassTransformer.java

License:Creative Commons License

private static byte[] transformLayerArmorBase(byte[] basicClass) {
    log("Transforming LayerArmorBase");
    MethodSignature sig1 = new MethodSignature("renderArmorLayer", "func_188361_a", "a",
            "(Lnet/minecraft/entity/EntityLivingBase;FFFFFFFLnet/minecraft/inventory/EntityEquipmentSlot;)V");
    MethodSignature sig2 = new MethodSignature("renderEnchantedGlint", "func_188364_a", "a",
            "(Lnet/minecraft/client/renderer/entity/RenderLivingBase;Lnet/minecraft/entity/EntityLivingBase;Lnet/minecraft/client/model/ModelBase;FFFFFFF)V");

    byte[] transClass = basicClass;

    transClass = transform(transClass, Pair.of(sig1, combine((AbstractInsnNode node) -> { // Filter
        return node.getOpcode() == Opcodes.ASTORE;
    }, (MethodNode method, AbstractInsnNode node) -> { // Action
        InsnList newInstructions = new InsnList();

        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 10));
        newInstructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, ASM_HOOKS, "setColorRuneTargetStack",
                "(Lnet/minecraft/item/ItemStack;)V"));

        method.instructions.insert(node, newInstructions);
        return true;
    })));/* w w w.jav  a  2 s. co m*/

    if (!hasOptifine(sig2.toString())) {
        invokestaticCount = 0;
        transClass = transform(transClass, Pair.of(sig2, combine((AbstractInsnNode node) -> { // Filter
            return node.getOpcode() == Opcodes.INVOKESTATIC && ((MethodInsnNode) node).desc.equals("(FFFF)V");
        }, (MethodNode method, AbstractInsnNode node) -> { // Action
            invokestaticCount++;

            InsnList newInstructions = new InsnList();

            newInstructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, ASM_HOOKS, "applyRuneColor", "()V"));

            method.instructions.insert(node, newInstructions);
            return invokestaticCount == 2;
        })));
    }

    return transClass;
}

---

From source file:vazkii.quark.base.asm.ClassTransformer.java

License:Creative Commons License

private static byte[] transformBlockPistonBase(byte[] basicClass) {
    log("Transforming BlockPistonBase");
    MethodSignature sig1 = new MethodSignature("doMove", "func_176319_a", "a",
            "(Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/EnumFacing;Z)Z");
    MethodSignature sig2 = new MethodSignature("canPush", "func_185646_a", "a",
            "(Lnet/minecraft/block/state/IBlockState;Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/EnumFacing;ZLnet/minecraft/util/EnumFacing;)Z");

    byte[] transClass = transform(basicClass, Pair.of(sig1, combine((AbstractInsnNode node) -> { // Filter
        return node.getOpcode() == Opcodes.ASTORE && ((VarInsnNode) node).var == 11;
    }, (MethodNode method, AbstractInsnNode node) -> { // Action
        InsnList newInstructions = new InsnList();

        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 1));
        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 2));
        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 6));
        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 8));
        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 11));
        newInstructions.add(new VarInsnNode(Opcodes.ILOAD, 4));
        newInstructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, ASM_HOOKS, "breakStuffWithSpikes",
                "(Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;Ljava/util/List;Ljava/util/List;Lnet/minecraft/util/EnumFacing;Z)Z"));

        // recalculate the list and array sizes
        LabelNode label = new LabelNode();
        newInstructions.add(new JumpInsnNode(Opcodes.IFEQ, label));

        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 6));
        newInstructions.add(new MethodInsnNode(Opcodes.INVOKEINTERFACE, "java/util/List", "size", "()I"));
        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 8));
        newInstructions.add(new MethodInsnNode(Opcodes.INVOKEINTERFACE, "java/util/List", "size", "()I"));
        newInstructions.add(new InsnNode(Opcodes.IADD));
        newInstructions.add(new VarInsnNode(Opcodes.ISTORE, 9));
        newInstructions.add(new VarInsnNode(Opcodes.ILOAD, 9));

        AbstractInsnNode newNode = node.getPrevious();
        while (true) {
            if (newNode.getOpcode() == Opcodes.ANEWARRAY) {
                newInstructions.add(new TypeInsnNode(Opcodes.ANEWARRAY, ((TypeInsnNode) newNode).desc));
                break;
            }/*from  ww  w .j ava2  s .  c  om*/
            newNode = newNode.getPrevious();
        }

        newInstructions.add(new VarInsnNode(Opcodes.ASTORE, 10));
        newInstructions.add(label);

        method.instructions.insert(node, newInstructions);
        return true;
    })));

    transClass = transform(transClass, Pair.of(sig2, combine((AbstractInsnNode node) -> { // Filter
        return node.getOpcode() == Opcodes.INVOKEVIRTUAL
                && ((MethodInsnNode) node).name.equals("hasTileEntity");
    }, (MethodNode method, AbstractInsnNode node) -> { // Action
        InsnList newInstructions = new InsnList();

        newInstructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
        newInstructions.add(new MethodInsnNode(Opcodes.INVOKESTATIC, ASM_HOOKS, "shouldPistonMoveTE",
                "(ZLnet/minecraft/block/state/IBlockState;)Z"));

        method.instructions.insert(node, newInstructions);
        return true;
    })));

    return transClass;
}

---

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