Example usage for org.objectweb.asm Label Label

List of usage examples for org.objectweb.asm Label Label

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Introduction

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

Prototype

public Label()

Source Link

Document

Constructs a new label.

Usage

From source file:com.google.test.metric.method.BlockDecomposerTest.java

License:Apache License

public void testTwoJsrSameLabel() throws Exception {
    BlockDecomposer decomposer = new BlockDecomposer();
    Label label = new Label();
    decomposer.jumpSubroutine(label, 0);
    decomposer.jumpSubroutine(label, 0);
    decomposer.decomposeIntoBlocks();//  ww w  . ja  v a 2s  .c o  m

    Block main = decomposer.getMainBlock();
    assertEquals("[JSR sub_0, JSR sub_0]", main.getOperations().toString());
}

From source file:com.google.test.metric.method.BlockDecomposerTest.java

License:Apache License

public void testMultipleHandlersSingleExceptionLoad() throws Exception {
    BlockDecomposer decomposer = new BlockDecomposer();
    Label start = new Label();
    Label end = new Label();
    Label handler = new Label();
    decomposer.tryCatchBlock(start, end, handler, null);
    decomposer.tryCatchBlock(start, end, handler, null);
    decomposer.label(start);/* ww w. j av a  2 s .c  o m*/
    decomposer.addOp(load(1));
    decomposer.label(end);
    decomposer.addOp(load(2));
    decomposer.label(handler);
    decomposer.addOp(load(3));
    decomposer.decomposeIntoBlocks();

    assertEquals("[load ?{java.lang.Throwable}, load 1{int}, load 2{int}, load 3{int}]",
            decomposer.getMainBlock().getOperations().toString());
}

From source file:com.googlecode.d2j.converter.IR2JConverter.java

License:Apache License

private void mapLabelStmt(IrMethod ir) {
    for (Stmt p : ir.stmts) {
        if (p.st == ST.LABEL) {
            LabelStmt labelStmt = (LabelStmt) p;
            labelStmt.tag = new Label();
        }//from   w w  w . j a v  a  2s .c  om
    }
}

From source file:com.googlecode.ddom.weaver.compound.CompoundClassGenerator.java

License:Apache License

@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, name, desc, signature, exceptions);
    if (mv != null) {
        Type[] argumentTypes = Type.getArgumentTypes(desc);
        mv.visitCode();/*from w  ww  .  ja  va 2s . com*/
        Label l0 = new Label();
        mv.visitLabel(l0);
        for (int i = 0; i < componentClasses.length; i++) {
            String componentClass = Util.classNameToInternalName(componentClasses[i]);
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitFieldInsn(Opcodes.GETFIELD, className, "c" + i, "L" + componentClass + ";");
            for (int j = 0; j < argumentTypes.length; j++) {
                mv.visitVarInsn(argumentTypes[j].getOpcode(Opcodes.ILOAD), j + 1);
            }
            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, ifaceName, name, desc);
        }
        mv.visitInsn(Opcodes.RETURN);
        Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLocalVariable("this", "L" + className + ";", null, l0, l1, 0);
        mv.visitMaxs(argumentTypes.length + 1, argumentTypes.length + 1);
        mv.visitEnd();
    }
    return null;
}

From source file:com.googlecode.ddom.weaver.compound.CompoundClassGenerator.java

License:Apache License

@Override
public void visitEnd() {
    for (int i = 0; i < componentClasses.length; i++) {
        String componentClass = Util.classNameToInternalName(componentClasses[i]);
        FieldVisitor fv = cv.visitField(Opcodes.ACC_PRIVATE, "c" + i, "L" + componentClass + ";", null, null);
        if (fv != null) {
            fv.visitEnd();// w ww. j a  v a2 s .c o m
        }
    }
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
    if (mv != null) {
        mv.visitCode();
        Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
        for (int i = 0; i < componentClasses.length; i++) {
            String componentClass = Util.classNameToInternalName(componentClasses[i]);
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitTypeInsn(Opcodes.NEW, componentClass);
            mv.visitInsn(Opcodes.DUP);
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, componentClass, "<init>", "()V");
            mv.visitFieldInsn(Opcodes.PUTFIELD, className, "c" + i, "L" + componentClass + ";");
        }
        mv.visitInsn(Opcodes.RETURN);
        Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLocalVariable("this", "L" + className + ";", null, l0, l1, 0);
        mv.visitMaxs(3, 1);
        mv.visitEnd();
    }
    cv.visitEnd();
}

From source file:com.googlecode.ddom.weaver.ext.ModelExtensionClass.java

License:Apache License

public void accept(ClassVisitor classVisitor) {
    ImplementationInfo implementationInfo = info.getImplementation().get(ImplementationInfo.class);
    String name = Util.classNameToInternalName(info.getClassName());
    String superName = Util.classNameToInternalName(info.getSuperClassName());
    classVisitor.visit(Opcodes.V1_5,/*www  . j  av  a 2s .  c o  m*/
            info.isAbstract() ? Opcodes.ACC_PUBLIC | Opcodes.ACC_ABSTRACT : Opcodes.ACC_PUBLIC, name, null,
            superName, new String[] {
                    Util.classNameToInternalName(info.getExtensionInterface().getClassInfo().getName()) });
    for (ConstructorInfo constructor : implementationInfo.getConstructors()) {
        MethodVisitor mv = classVisitor.visitMethod(Opcodes.ACC_PUBLIC, "<init>", constructor.getDescriptor(),
                constructor.getSignature(), constructor.getExceptions());
        if (mv != null) {
            mv.visitCode();
            Label l0 = new Label();
            mv.visitLabel(l0);
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            Type[] argumentTypes = constructor.getArgumentTypes();
            for (int i = 0; i < argumentTypes.length; i++) {
                mv.visitVarInsn(argumentTypes[i].getOpcode(Opcodes.ILOAD), i + 1);
            }
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, superName, "<init>", constructor.getDescriptor());
            mv.visitInsn(Opcodes.RETURN);
            Label l1 = new Label();
            mv.visitLabel(l1);
            mv.visitLocalVariable("this", "L" + name + ";", null, l0, l1, 0);
            for (int i = 0; i < argumentTypes.length; i++) {
                mv.visitLocalVariable("arg" + i, argumentTypes[i].getDescriptor(), null, l0, l1, i + 1);
            }
            mv.visitMaxs(argumentTypes.length + 1, argumentTypes.length + 1);
            mv.visitEnd();
        }
    }
    classVisitor.visitEnd();
}

From source file:com.googlecode.ddom.weaver.ext.ModelExtensionFactoryDelegateImplementation.java

License:Apache License

public void accept(ClassVisitor classVisitor) {
    String factoryName = Util
            .classNameToInternalName(modelExtensionClassInfo.getFactoryDelegateImplementationClassName());
    classVisitor.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, factoryName, null, "java/lang/Object", new String[] {
            Util.classNameToInternalName(implementationInfo.getFactoryDelegateInterfaceName()) });
    String className = Util.classNameToInternalName(modelExtensionClassInfo.getClassName());
    {/*  w  ww. ja va 2  s  .c  o m*/
        MethodVisitor mv = classVisitor.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
        if (mv != null) {
            mv.visitCode();
            Label l0 = new Label();
            mv.visitLabel(l0);
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
            mv.visitInsn(Opcodes.RETURN);
            Label l1 = new Label();
            mv.visitLabel(l1);
            mv.visitLocalVariable("this", "L" + className + ";", null, l0, l1, 0);
            mv.visitMaxs(1, 1);
            mv.visitEnd();
        }
    }
    for (ConstructorInfo constructor : implementationInfo.getConstructors()) {
        MethodVisitor mv = classVisitor.visitMethod(Opcodes.ACC_PUBLIC, "create",
                constructor.getFactoryDelegateMethodDescriptor(), constructor.getSignature(),
                constructor.getExceptions());
        if (mv != null) {
            mv.visitCode();
            Label l0 = new Label();
            mv.visitLabel(l0);
            mv.visitTypeInsn(Opcodes.NEW, className);
            mv.visitInsn(Opcodes.DUP);
            Type[] argumentTypes = constructor.getArgumentTypes();
            for (int i = 0; i < argumentTypes.length; i++) {
                mv.visitVarInsn(argumentTypes[i].getOpcode(Opcodes.ILOAD), i + 1);
            }
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, className, "<init>", constructor.getDescriptor());
            mv.visitInsn(Opcodes.ARETURN);
            Label l1 = new Label();
            mv.visitLabel(l1);
            mv.visitLocalVariable("this", "L" + factoryName + ";", null, l0, l1, 0);
            for (int i = 0; i < argumentTypes.length; i++) {
                mv.visitLocalVariable("arg" + i, argumentTypes[i].getDescriptor(), null, l0, l1, i + 1);
            }
            mv.visitMaxs(argumentTypes.length + 2, argumentTypes.length + 1);
            mv.visitEnd();
        }
    }
    classVisitor.visitEnd();
}

From source file:com.googlecode.ddom.weaver.ext.ModelExtensionFactoryImplementation.java

License:Apache License

public void accept(ClassVisitor classVisitor) {
    // Note: the name chosen here must match what is expected in ExtensionFactoryLocator
    String name = Util.classNameToInternalName(implementationInfo.getFactoryInterface().getName() + "$$Impl");
    String factoryInterfaceName = Util
            .classNameToInternalName(implementationInfo.getFactoryInterface().getName());
    classVisitor.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, name, null, "java/lang/Object",
            new String[] { factoryInterfaceName });
    {/*ww w.  java  2 s  . c om*/
        FieldVisitor fw = classVisitor.visitField(Opcodes.ACC_PUBLIC | Opcodes.ACC_FINAL | Opcodes.ACC_STATIC,
                "INSTANCE", "L" + factoryInterfaceName + ";", null, null);
        if (fw != null) {
            fw.visitEnd();
        }
    }
    {
        FieldVisitor fw = classVisitor.visitField(Opcodes.ACC_PRIVATE | Opcodes.ACC_FINAL, "delegates",
                "Ljava/util/Map;", null, null);
        if (fw != null) {
            fw.visitEnd();
        }
    }
    {
        MethodVisitor mv = classVisitor.visitMethod(Opcodes.ACC_PRIVATE, "<init>", "()V", null, null);
        if (mv != null) {
            mv.visitCode();
            Label l0 = new Label();
            mv.visitLabel(l0);
            // Call constructor from superclass
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
            // Create delegates map
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitTypeInsn(Opcodes.NEW, "java/util/HashMap");
            mv.visitInsn(Opcodes.DUP);
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/util/HashMap", "<init>", "()V");
            mv.visitFieldInsn(Opcodes.PUTFIELD, name, "delegates", "Ljava/util/Map;");
            // Populate delegates map
            for (ModelExtensionInfo modelExtensionInfo : implementationInfo.getModelExtensions()) {
                for (ModelExtensionInterfaceInfo extensionInterface : modelExtensionInfo
                        .getExtensionInterfaces()) {
                    if (!extensionInterface.isAbstract()) {
                        // TODO: this is stupid; we should not recreate the info object here
                        ModelExtensionClassInfo modelExtensionClassInfo = new ModelExtensionClassInfo(
                                implementationInfo.getImplementation(), modelExtensionInfo.getRootInterface(),
                                extensionInterface);
                        String factoryDelegateImplName = Util.classNameToInternalName(
                                modelExtensionClassInfo.getFactoryDelegateImplementationClassName());
                        mv.visitVarInsn(Opcodes.ALOAD, 0);
                        mv.visitFieldInsn(Opcodes.GETFIELD, name, "delegates", "Ljava/util/Map;");
                        mv.visitLdcInsn(Type.getObjectType(Util.classNameToInternalName(
                                modelExtensionClassInfo.getExtensionInterface().getClassInfo().getName())));
                        mv.visitTypeInsn(Opcodes.NEW, factoryDelegateImplName);
                        mv.visitInsn(Opcodes.DUP);
                        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, factoryDelegateImplName, "<init>", "()V");
                        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/Map", "put",
                                "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
                        mv.visitInsn(Opcodes.POP);
                    }
                }
            }
            mv.visitInsn(Opcodes.RETURN);
            Label l1 = new Label();
            mv.visitLabel(l1);
            mv.visitLocalVariable("this", "L" + name + ";", null, l0, l1, 0);
            mv.visitMaxs(4, 1);
            mv.visitEnd();
        }
    }
    String factoryDelegateInterfaceName = Util
            .classNameToInternalName(implementationInfo.getFactoryDelegateInterfaceName());
    String getDelegateDesc = "(Ljava/lang/Class;)L" + factoryDelegateInterfaceName + ";";
    {
        MethodVisitor mv = classVisitor.visitMethod(Opcodes.ACC_PRIVATE, "getDelegate", getDelegateDesc, null,
                null);
        if (mv != null) {
            mv.visitCode();
            Label l0 = new Label();
            mv.visitLabel(l0);
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitFieldInsn(Opcodes.GETFIELD, name, "delegates", "Ljava/util/Map;");
            mv.visitVarInsn(Opcodes.ALOAD, 1);
            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/Map", "get",
                    "(Ljava/lang/Object;)Ljava/lang/Object;");
            mv.visitTypeInsn(Opcodes.CHECKCAST, factoryDelegateInterfaceName);
            mv.visitInsn(Opcodes.ARETURN);
            Label l1 = new Label();
            mv.visitLabel(l1);
            mv.visitLocalVariable("this", "L" + name + ";", null, l0, l1, 0);
            mv.visitLocalVariable("extensionInterface", "Ljava/lang/Class;", null, l0, l1, 1);
            mv.visitMaxs(2, 2);
            mv.visitEnd();
        }
    }
    String implementationName = Util.classNameToInternalName(implementationInfo.getImplementation().getName());
    for (ConstructorInfo constructor : implementationInfo.getConstructors()) {
        Type[] constructorArgumentTypes = constructor.getArgumentTypes();
        Type[] argumentTypes = new Type[constructorArgumentTypes.length + 1];
        argumentTypes[0] = Type.getObjectType("java/lang/Class");
        System.arraycopy(constructorArgumentTypes, 0, argumentTypes, 1, constructorArgumentTypes.length);
        MethodVisitor mv = classVisitor.visitMethod(Opcodes.ACC_PUBLIC, "create",
                Type.getMethodDescriptor(Type.getObjectType(implementationName), argumentTypes), null, null);
        if (mv != null) {
            mv.visitCode();
            Label l0 = new Label();
            mv.visitLabel(l0);
            mv.visitVarInsn(Opcodes.ALOAD, 1);
            Label l1 = new Label();
            mv.visitJumpInsn(Opcodes.IFNONNULL, l1);
            mv.visitTypeInsn(Opcodes.NEW, implementationName);
            mv.visitInsn(Opcodes.DUP);
            for (int i = 0; i < constructorArgumentTypes.length; i++) {
                mv.visitVarInsn(constructorArgumentTypes[i].getOpcode(Opcodes.ILOAD), i + 2);
            }
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, implementationName, "<init>",
                    constructor.getDescriptor());
            mv.visitInsn(Opcodes.ARETURN);
            mv.visitLabel(l1);
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitVarInsn(Opcodes.ALOAD, 1);
            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, name, "getDelegate", getDelegateDesc);
            for (int i = 0; i < constructorArgumentTypes.length; i++) {
                mv.visitVarInsn(constructorArgumentTypes[i].getOpcode(Opcodes.ILOAD), i + 2);
            }
            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, factoryDelegateInterfaceName, "create",
                    constructor.getFactoryDelegateMethodDescriptor());
            mv.visitInsn(Opcodes.ARETURN);
            Label l3 = new Label();
            mv.visitLabel(l3);
            mv.visitLocalVariable("this", "L" + name + ";", null, l0, l3, 0);
            mv.visitLocalVariable("extensionInterface", "Ljava/lang/Class;", null, l0, l3, 1);
            for (int i = 0; i < constructorArgumentTypes.length; i++) {
                mv.visitLocalVariable("arg" + i, constructorArgumentTypes[i].getDescriptor(), null, l0, l3,
                        i + 2);
            }
            mv.visitMaxs(argumentTypes.length + 1, argumentTypes.length + 1);
            mv.visitEnd();
        }
    }
    {
        MethodVisitor mv = classVisitor.visitMethod(Opcodes.ACC_STATIC, "<clinit>", "()V", null, null);
        if (mv != null) {
            mv.visitCode();
            mv.visitTypeInsn(Opcodes.NEW, name);
            mv.visitInsn(Opcodes.DUP);
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, name, "<init>", "()V");
            mv.visitFieldInsn(Opcodes.PUTSTATIC, name, "INSTANCE", "L" + factoryInterfaceName + ";");
            mv.visitInsn(Opcodes.RETURN);
            mv.visitMaxs(2, 0);
            mv.visitEnd();
        }
    }
    classVisitor.visitEnd();
}

From source file:com.googlecode.ddom.weaver.inject.InjectionAdapter.java

License:Apache License

@Override
public void visitEnd() {
    for (InjectableFieldInfo fieldInfo : injectionInfo.getInjectableFields()) {
        MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC,
                fieldInfo.getFactoryMethodName(), fieldInfo.getFactoryMethodDesc(), null, new String[0]);
        if (mv != null) {
            fieldInfo.getInjector().generateFactoryMethodCode(mv);
        }/*from   w  ww . j  a va 2s . c  o m*/
    }
    if (injectionInfo.hasInjectableInstanceFields()) {
        MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PRIVATE, "inject$$instance", "()V", null, new String[0]);
        if (mv != null) {
            mv.visitCode();
            Label l0 = new Label();
            mv.visitLabel(l0);
            for (InjectableFieldInfo fieldInfo : injectionInfo.getInjectableFields()) {
                if (!fieldInfo.isStatic()) {
                    mv.visitVarInsn(Opcodes.ALOAD, 0);
                    mv.visitMethodInsn(Opcodes.INVOKESTATIC, className, fieldInfo.getFactoryMethodName(),
                            fieldInfo.getFactoryMethodDesc());
                    mv.visitFieldInsn(Opcodes.PUTFIELD, className, fieldInfo.getFieldName(),
                            fieldInfo.getFieldDesc());
                }
            }
            mv.visitInsn(Opcodes.RETURN);
            Label l1 = new Label();
            mv.visitLabel(l1);
            mv.visitLocalVariable("this", "L" + className + ";", null, l0, l1, 0);
            mv.visitMaxs(2, 1);
            mv.visitEnd();
        }
    }
    if (injectionInfo.hasInjectableClassFields()) {
        MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC,
                hasClassInitializer ? "inject$$class" : "<clinit>", "()V", null, new String[0]);
        if (mv != null) {
            mv.visitCode();
            for (InjectableFieldInfo fieldInfo : injectionInfo.getInjectableFields()) {
                if (fieldInfo.isStatic()) {
                    mv.visitMethodInsn(Opcodes.INVOKESTATIC, className, fieldInfo.getFactoryMethodName(),
                            fieldInfo.getFactoryMethodDesc());
                    mv.visitFieldInsn(Opcodes.PUTSTATIC, className, fieldInfo.getFieldName(),
                            fieldInfo.getFieldDesc());
                }
            }
            mv.visitInsn(Opcodes.RETURN);
            mv.visitMaxs(1, 0);
            mv.visitEnd();
        }
    }
    super.visitEnd();
}

From source file:com.googlecode.dex2jar.ir.stmt.Stmts.java

License:Apache License

public static LabelStmt nLabel() {
    return new LabelStmt(new Label());
}