Example usage for org.objectweb.asm MethodVisitor visitVarInsn

List of usage examples for org.objectweb.asm MethodVisitor visitVarInsn

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Introduction

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

Prototype

public void visitVarInsn(final int opcode, final int var)

Source Link

Document

Visits a local variable instruction.

Usage

From source file:bluejelly.runtime.ModuleLoader.java

License:BSD License

/**
 * Generate a {@link Caf} subclass for the given method information.
 * // w  ww .j av a  2  s.c  om
 * @param module    module declaring the method to process
 * @param ci        code info for the method to process
 * 
 * @return
 *   a {@link Caf} subclass whose <code>fastEnter</code> will call
 *   module.ci.getMethod() with an {@link ExecutionContext} as argument.
 */
@SuppressWarnings("unchecked")
private Class<Caf> generateCaf(Module module, CodeInfo ci) {
    String nodeName = this.genNodeName(ci);
    String cafName = Type.getInternalName(Caf.class);
    String moduleName = Type.getInternalName(module.getClass());
    String methodName = ci.getMethod().getName();

    ClassWriter cw = new ClassWriter(0);
    cw.visit(V1_6, ACC_PUBLIC + ACC_FINAL, nodeName, null, cafName, null);

    {
        String consDesc = Type.getMethodDescriptor(Type.VOID_TYPE,
                new Type[] { Type.getType(Module.class), Type.getType(String.class) });

        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", consDesc, null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKESPECIAL, cafName, "<init>", consDesc);
        mv.visitInsn(RETURN);
        mv.visitMaxs(3, 3);
        mv.visitEnd();
    }

    this.generateFastEnter(cw, cafName, moduleName, methodName);

    cw.visitEnd();

    byte[] b = cw.toByteArray();
    Class<?> clazz = this.loader.defineClass(nodeName, b);
    return (Class<Caf>) clazz;
}

From source file:bluejelly.runtime.ModuleLoader.java

License:BSD License

/**
 * Generate a {@link Code} subclass for the given method information.
 * //from   ww  w  .j  a  v a2s  .c om
 * @param module    module declaring the method to process
 * @param ci        code info for the method to process
 * 
 * @return          
 *   a {@link Code} subclass whose <code>fastEnter</code> will call
 *   module.ci.getMethod() with an {@link ExecutionContext} as argument.
 */
@SuppressWarnings("unchecked")
private Class<Code> generateCode(Module module, CodeInfo ci) {
    String nodeName = this.genNodeName(ci);
    String codeName = Type.getInternalName(Code.class);
    String moduleName = Type.getInternalName(module.getClass());
    String methodName = ci.getMethod().getName();

    ClassWriter cw = new ClassWriter(0);
    cw.visit(V1_6, ACC_PUBLIC + ACC_FINAL, nodeName, null, codeName, null);

    {
        String consDesc = Type.getMethodDescriptor(Type.VOID_TYPE,
                new Type[] { Type.getType(int.class), Type.getType(Module.class), Type.getType(String.class) });

        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", consDesc, null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ILOAD, 1);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitVarInsn(ALOAD, 3);
        mv.visitMethodInsn(INVOKESPECIAL, codeName, "<init>", consDesc);
        mv.visitInsn(RETURN);
        mv.visitMaxs(4, 4);
        mv.visitEnd();
    }

    this.generateFastEnter(cw, codeName, moduleName, methodName);

    cw.visitEnd();

    byte[] b = cw.toByteArray();
    Class<?> clazz = this.loader.defineClass(nodeName, b);
    return (Class<Code>) clazz;
}

From source file:bluejelly.runtime.ModuleLoader.java

License:BSD License

/**
 * Override <code>fastEnter</code> method in class being visited
 * by <code>cw</code>, subclass of <code>superName</code>. Method
 * will call <code>methodName</code>. declared in class 
 * <code>moduleName</code>. So , assuming class generated by
 * <code>cw</code> is named <code>X</code>, we will have:
 * /*  w w  w .  ja v  a 2 s . c o  m*/
 * <p>
 * <code>
 * class X extends superName {
 *     public void fastEnter(ExecutionContext ctx) {
 *         ((moduleName)this.module).methodName(ctx);
 *     }
 * }
 * </code>
 * 
 * @param cw            class writer generating class code
 * @param superName     internal name of superclass: Code or Caf
 * @param moduleName    internal name of module class
 * @param methodName    name of method to invoke in module moduleName
 */
private void generateFastEnter(ClassWriter cw, String superName, String moduleName, String methodName) {

    String fieldDesc = Type.getDescriptor(Module.class);
    String methodDesc = "(" + Type.getDescriptor(ExecutionContext.class) + ")V";

    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "fastEnter", methodDesc, null, null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, superName, "module", fieldDesc);
    mv.visitTypeInsn(CHECKCAST, moduleName);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, moduleName, methodName, methodDesc);
    mv.visitInsn(RETURN);
    mv.visitMaxs(2, 2);
    mv.visitEnd();
}

From source file:blusunrize.immersiveengineering.common.util.compat.jei.arcfurnace.ArcFurnaceRecipeWrapper.java

private static Class<? extends ArcFurnaceRecipeWrapper> createSubWrapper(String subtype) throws Exception {
    String entitySuperClassName = Type.getInternalName(ArcFurnaceRecipeWrapper.class);
    String entityProxySubClassName = ArcFurnaceRecipeWrapper.class.getSimpleName().concat(subtype);
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    cw.visit(Opcodes.V1_6, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, entityProxySubClassName, null,
            entitySuperClassName, null);
    cw.visitSource(entityProxySubClassName.concat(".java"), null);
    //create constructor
    String methodDescriptor = "(L" + Type.getInternalName(ArcFurnaceRecipe.class) + ";)V";
    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", methodDescriptor, null, null);
    mv.visitCode();/*w  w w . ja  v  a2  s .  c  o m*/
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, entitySuperClassName, "<init>", methodDescriptor, false);
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
    cw.visitEnd();
    return (Class<? extends ArcFurnaceRecipeWrapper>) new ProxyClassLoader(
            Thread.currentThread().getContextClassLoader(), cw.toByteArray())
                    .loadClass(entityProxySubClassName.replaceAll("/", "."));
}

From source file:boilerplate.processor.adapters.EqualsAdapter.java

License:Open Source License

private void addEqualsMethod(List<FieldInfo> fields) {
    // CODE: public boolean equals(Object obj) {
    MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, "equals", "(Ljava/lang/Object;)Z", null, null);
    mv.visitCode();//from  w w  w .j  a  va  2 s.co  m

    // CODE: if (this == obj) return true;
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    Label l0 = new Label();
    mv.visitJumpInsn(IF_ACMPNE, l0);
    mv.visitInsn(ICONST_1);
    mv.visitInsn(IRETURN);
    mv.visitLabel(l0);
    mv.visitFrame(F_SAME, 0, null, 0, null);

    // CODE: if (!(obj instanceof Foo)) return false;
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(INSTANCEOF, typeInfo.type);
    Label l1 = new Label();
    mv.visitJumpInsn(IFNE, l1);
    mv.visitInsn(ICONST_0);
    mv.visitInsn(IRETURN);
    mv.visitLabel(l1);
    mv.visitFrame(F_SAME, 0, null, 0, null);

    // CODE: final Foo other = (Foo) obj;
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(CHECKCAST, typeInfo.type);
    mv.visitVarInsn(ASTORE, 2);

    for (FieldInfo info : fields) {
        addTest(mv, info);
    }

    // CODE: return true; }
    mv.visitInsn(ICONST_1);
    mv.visitInsn(IRETURN);
    mv.visitMaxs(1, 2);
    mv.visitEnd();
}

From source file:boilerplate.processor.adapters.EqualsAdapter.java

License:Open Source License

private void addHashCodeMethod(List<FieldInfo> fields) {
    // CODE: public int hashCode() {
    MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, "hashCode", "()I", null, null);
    mv.visitCode();/*from w  w w . j  av  a2 s. c o m*/

    // CODE: final int prime = 31;
    mv.visitIntInsn(BIPUSH, 31);
    mv.visitVarInsn(ISTORE, 1);
    mv.visitInsn(ICONST_1);

    // CODE: int result = 1;
    mv.visitVarInsn(ISTORE, 2);

    for (FieldInfo fieldInfo : fields) {
        addCalculation(mv, fieldInfo);
    }

    // CODE: return result; }
    mv.visitVarInsn(ILOAD, 2);
    mv.visitInsn(IRETURN);
    mv.visitMaxs(1, 3);
    mv.visitEnd();
}

From source file:boilerplate.processor.adapters.ToStringAdapter.java

License:Open Source License

private void addMethod() {
    List<String> fieldNames = new ArrayList<String>(typeInfo.fields.size());
    Map<String, FieldInfo> fields = new HashMap<String, FieldInfo>(typeInfo.fields.size());
    boolean hasAnnotatedFields = typeInfo.hasAnnotatedFields();
    for (FieldInfo info : typeInfo.fields) {
        if (!(hasAnnotatedFields ^ info.mark == Mark.INCLUDE)) {
            fieldNames.add(info.name);//from   w  w  w  .  j  a va  2 s  .co  m
            fields.put(info.name, info);
        }
    }
    Collections.sort(fieldNames);

    MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
    mv.visitCode();
    mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
    mv.visitInsn(DUP);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "()V");
    mv.visitVarInsn(ASTORE, 1);
    for (String name : fieldNames) {
        FieldInfo info = fields.get(name);
        addField(mv, info);
    }
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;");
    mv.visitInsn(ARETURN);
    mv.visitMaxs(4, 2);
    mv.visitEnd();
}

From source file:boilerplate.processor.adapters.ToStringMethodInsertion.java

License:Open Source License

public void generateCode(MethodVisitor mv, TypeInfo typeInfo, FieldInfo fieldInfo) {
    mv.visitVarInsn(ALOAD, 1);
    mv.visitLdcInsn(fieldInfo.name);//ww  w.  j a va2 s  .c om
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, typeInfo.type, fieldInfo.name, fieldInfo.type.getDescriptor());
    mv.visitMethodInsn(INVOKESTATIC, "boilerplate/tostring/ToStringUtils", methodName, methodSignature);
}

From source file:br.usp.each.saeg.badua.core.internal.instr.IntegerInitProbe.java

License:Open Source License

@Override
public void accept(final MethodVisitor mv) {
    mv.visitInsn(Opcodes.ICONST_0);//from   w w  w.  ja v a2s  . c  o  m
    mv.visitVarInsn(Opcodes.ISTORE, vCovered);
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitVarInsn(Opcodes.ISTORE, vAlive);
    mv.visitInsn(Opcodes.ICONST_M1);
    mv.visitVarInsn(Opcodes.ISTORE, vSleepy);
}

From source file:br.usp.each.saeg.badua.core.internal.instr.IntegerProbe.java

License:Open Source License

@Override
public void accept(final MethodVisitor mv) {

    // update covered
    if (potcov != 0) {
        mv.visitVarInsn(Opcodes.ILOAD, vAlive);

        if (!singlePredecessor && potcovpuse != 0) {
            mv.visitVarInsn(Opcodes.ILOAD, vSleepy);
            mv.visitInsn(Opcodes.IAND);/*from  www  .  ja  va2s  .  c  o  m*/
        }

        InstrSupport.push(mv, (int) potcov);
        mv.visitInsn(Opcodes.IAND);
        mv.visitVarInsn(Opcodes.ILOAD, vCovered);
        mv.visitInsn(Opcodes.IOR);
        mv.visitVarInsn(Opcodes.ISTORE, vCovered);
    }

    // update alive
    if (disabled != 0) {
        InstrSupport.push(mv, ~(int) disabled);
        mv.visitVarInsn(Opcodes.ILOAD, vAlive);
        mv.visitInsn(Opcodes.IAND);
    }
    if (born != 0) {
        if (disabled == 0) {
            mv.visitVarInsn(Opcodes.ILOAD, vAlive);
        }
        InstrSupport.push(mv, (int) born);
        mv.visitInsn(Opcodes.IOR);
    }
    if (disabled != 0 || born != 0) {
        mv.visitVarInsn(Opcodes.ISTORE, vAlive);
    }

    // update sleepy
    InstrSupport.push(mv, ~(int) sleepy);
    mv.visitVarInsn(Opcodes.ISTORE, vSleepy);

}