Example usage for org.objectweb.asm Opcodes GETSTATIC

Introduction

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

Prototype

int GETSTATIC

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

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Usage

From source file:org.jacoco.core.internal.instr.ClassFieldProbeArrayStrategy.java

License:Open Source License

private void createInitMethod(final ClassVisitor cv, final int probeCount) {
    final MethodVisitor mv = cv.visitMethod(InstrSupport.INITMETHOD_ACC, InstrSupport.INITMETHOD_NAME,
            InstrSupport.INITMETHOD_DESC, null, null);
    mv.visitCode();// w  ww . ja va2 s. c om

    // Load the value of the static data field:
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, InstrSupport.DATAFIELD_NAME, InstrSupport.DATAFIELD_DESC);
    mv.visitInsn(Opcodes.DUP);

    // Stack[1]: [Z
    // Stack[0]: [Z

    // Skip initialization when we already have a data array:
    final Label alreadyInitialized = new Label();
    mv.visitJumpInsn(Opcodes.IFNONNULL, alreadyInitialized);

    // Stack[0]: [Z

    mv.visitInsn(Opcodes.POP);
    final int size = genInitializeDataField(mv, probeCount);

    // Stack[0]: [Z

    // Return the class' probe array:
    if (withFrames) {
        mv.visitFrame(Opcodes.F_NEW, 0, FRAME_LOCALS_EMPTY, 1, FRAME_STACK_ARRZ);
    }
    mv.visitLabel(alreadyInitialized);
    mv.visitInsn(Opcodes.ARETURN);

    mv.visitMaxs(Math.max(size, 2), 0); // Maximum local stack size is 2
    mv.visitEnd();
}

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From source file:org.jacoco.core.internal.instr.FrameTracker.java

License:Open Source License

@Override
public void visitFieldInsn(final int opcode, final String owner, final String name, final String desc) {
    final Type t = Type.getType(desc);
    switch (opcode) {
    case Opcodes.PUTSTATIC:
        pop(t);// www  . j  ava 2s  .co  m
        break;
    case Opcodes.PUTFIELD:
        pop(t);
        pop(1);
        break;
    case Opcodes.GETSTATIC:
        push(t);
        break;
    case Opcodes.GETFIELD:
        pop(1);
        push(t);
        break;
    default:
        throw new IllegalArgumentException();
    }
    mv.visitFieldInsn(opcode, owner, name, desc);
}

---

From source file:org.jacoco.core.internal.instr.InterfaceFieldProbeArrayStrategy.java

License:Open Source License

private void createInitMethod(final ClassVisitor cv, final int probeCount) {
    final MethodVisitor mv = cv.visitMethod(InstrSupport.INITMETHOD_ACC, InstrSupport.INITMETHOD_NAME,
            InstrSupport.INITMETHOD_DESC, null, null);
    mv.visitCode();//from   w  w  w.  j  av a2s .  com

    // Load the value of the static data field:
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, InstrSupport.DATAFIELD_NAME, InstrSupport.DATAFIELD_DESC);
    mv.visitInsn(Opcodes.DUP);

    // Stack[1]: [Z
    // Stack[0]: [Z

    // Skip initialization when we already have a data array:
    final Label alreadyInitialized = new Label();
    mv.visitJumpInsn(Opcodes.IFNONNULL, alreadyInitialized);

    // Stack[0]: [Z

    mv.visitInsn(Opcodes.POP);
    final int size = accessorGenerator.generateDataAccessor(classId, className, probeCount, mv);

    // Stack[0]: [Z

    // Return the class' probe array:
    mv.visitFrame(Opcodes.F_NEW, 0, FRAME_LOCALS_EMPTY, 1, FRAME_STACK_ARRZ);
    mv.visitLabel(alreadyInitialized);
    mv.visitInsn(Opcodes.ARETURN);

    mv.visitMaxs(Math.max(size, 2), 0); // Maximum local stack size is 2
    mv.visitEnd();
}

---

From source file:org.jacoco.core.runtime.InjectedClassRuntime.java

License:Open Source License

public int generateDataAccessor(final long classid, final String classname, final int probecount,
        final MethodVisitor mv) {
    mv.visitFieldInsn(Opcodes.GETSTATIC, injectedClassName, FIELD_NAME, FIELD_TYPE);

    RuntimeData.generateAccessCall(classid, classname, probecount, mv);

    return 6;/*from  w  w  w. j a  v a2s. c om*/
}

---

From source file:org.jacoco.core.runtime.LoggerRuntime.java

License:Open Source License

public int generateDataAccessor(final long classid, final String classname, final int probecount,
        final MethodVisitor mv) {

    // The data accessor performs the following steps:
    ////  www.ja v a2s  .  c om
    // final Object[] args = new Object[3];
    // args[0] = Long.valueOf(classid);
    // args[1] = classname;
    // args[2] = Integer.valueOf(probecount);
    // Logger.getLogger(CHANNEL).log(Level.INFO, key, args);
    // final byte[] probedata = (byte[]) args[0];
    //
    // Note that local variable 'args' is used at two places. As were not
    // allowed to allocate local variables we have to keep this value with
    // DUP and SWAP operations on the operand stack.

    // 1. Create parameter array:

    RuntimeData.generateArgumentArray(classid, classname, probecount, mv);

    // Stack[0]: [Ljava/lang/Object;

    mv.visitInsn(Opcodes.DUP);

    // Stack[1]: [Ljava/lang/Object;
    // Stack[0]: [Ljava/lang/Object;

    // 2. Call Logger:

    mv.visitLdcInsn(CHANNEL);
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/util/logging/Logger", "getLogger",
            "(Ljava/lang/String;)Ljava/util/logging/Logger;");

    // Stack[2]: Ljava/util/logging/Logger;
    // Stack[1]: [Ljava/lang/Object;
    // Stack[0]: [Ljava/lang/Object;

    mv.visitInsn(Opcodes.SWAP);

    // Stack[2]: [Ljava/lang/Object;
    // Stack[1]: Ljava/util/logging/Logger;
    // Stack[0]: [Ljava/lang/Object;

    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/util/logging/Level", "INFO", "Ljava/util/logging/Level;");

    // Stack[3]: Ljava/util/logging/Level;
    // Stack[2]: [Ljava/lang/Object;
    // Stack[1]: Ljava/util/logging/Logger;
    // Stack[0]: [Ljava/lang/Object;

    mv.visitInsn(Opcodes.SWAP);

    // Stack[3]: [Ljava/lang/Object;
    // Stack[2]: Ljava/util/logging/Level;
    // Stack[1]: Ljava/util/logging/Logger;
    // Stack[0]: [Ljava/lang/Object;

    mv.visitLdcInsn(key);

    // Stack[4]: Ljava/lang/String;
    // Stack[3]: [Ljava/lang/Object;
    // Stack[2]: Ljava/util/logging/Level;
    // Stack[1]: Ljava/util/logging/Logger;
    // Stack[0]: [Ljava/lang/Object;

    mv.visitInsn(Opcodes.SWAP);

    // Stack[4]: [Ljava/lang/Object;
    // Stack[3]: Ljava/lang/String;
    // Stack[2]: Ljava/util/logging/Level;
    // Stack[1]: Ljava/util/logging/Logger;
    // Stack[0]: [Ljava/lang/Object;

    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/util/logging/Logger", "log",
            "(Ljava/util/logging/Level;Ljava/lang/String;[Ljava/lang/Object;)V");

    // Stack[0]: [Ljava/lang/Object;

    // 3. Load data structure from parameter array:

    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitInsn(Opcodes.AALOAD);
    mv.visitTypeInsn(Opcodes.CHECKCAST, InstrSupport.DATAFIELD_DESC);

    // Stack[0]: [Z

    return 5; // Maximum local stack size is 5
}

---

From source file:org.jacoco.core.runtime.ModifiedSystemClassRuntime.java

License:Open Source License

public int generateDataAccessor(final long classid, final String classname, final int probecount,
        final MethodVisitor mv) {

    mv.visitFieldInsn(Opcodes.GETSTATIC, systemClassName, accessFieldName, ACCESS_FIELD_TYPE);

    RuntimeData.generateAccessCall(classid, classname, probecount, mv);

    return 6;//from  ww  w .  j  a v  a2  s .  co  m
}

---

From source file:org.jboss.as.hibernate.MethodAdapter.java

License:Open Source License

@Override
public void visitFieldInsn(int opcode, String owner, String name, String desc) {
    // App References to Enum org.hibernate.FlushMode.NEVER (0) should be transformed to reference FlushMode.MANUAL (0) instead.
    if (opcode == Opcodes.GETSTATIC && owner.equals("org/hibernate/FlushMode") && name.equals("NEVER")
            && desc.equals("Lorg/hibernate/FlushMode;")) {
        logger.debugf("Deprecated Hibernate51CompatibilityTransformer transformed application classes in '%s', "
                + "class '%s' is using org.hibernate.FlushMode.NEVER, change to org.hibernate.FlushMode.MANUAL.",
                moduleName, className);//from  w w w.  j  a v  a 2 s  .  c o  m
        mv.visitFieldInsn(opcode, owner, "MANUAL", desc);
        transformedState.setClassTransformed(true);
    } else {
        mv.visitFieldInsn(opcode, owner, name, desc);
    }
}

---

From source file:org.jboss.byteman.agent.adapter.RuleGeneratorAdapter.java

License:Open Source License

/**
 * Generates the instruction to push the value of a static field on the
 * stack./*from   w  ww.  j a v  a 2s. c  o m*/
 *
 * @param owner the class in which the field is defined.
 * @param name the name of the field.
 * @param type the type of the field.
 */
public void getStatic(final Type owner, final String name, final Type type) {
    fieldInsn(Opcodes.GETSTATIC, owner, name, type);
}

---

From source file:org.jboss.byteman.rule.expression.StaticExpression.java

License:Open Source License

public void compile(MethodVisitor mv, CompileContext compileContext) throws CompileException {
    // make sure we are at the right source line
    compileContext.notifySourceLine(line);

    int currentStack = compileContext.getStackCount();
    int expected;

    // compile a field access

    if (isPublicField) {
        String ownerType = Type.internalName(field.getDeclaringClass());
        String fieldName = field.getName();
        String fieldType = Type.internalName(field.getType(), true);
        mv.visitFieldInsn(Opcodes.GETSTATIC, ownerType, fieldName, fieldType);
        expected = (type.getNBytes() > 4 ? 2 : 1);
        compileContext.addStackCount(expected);
    } else {//  w w  w .j  a v  a 2s  . c om
        // since this is a private field we need to do the access using reflection
        // stack the helper, a null owner and the field index
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitInsn(Opcodes.ACONST_NULL);
        mv.visitLdcInsn(fieldIndex);
        compileContext.addStackCount(3);
        // use the HelperAdapter method getAccessibleField to get the field value
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.internalName(HelperAdapter.class),
                "getAccessibleField", "(Ljava/lang/Object;I)Ljava/lang/Object;");
        // we popped three words and added one object as result
        compileContext.addStackCount(-2);
        // convert Object to primitive or cast to subtype if required
        compileTypeConversion(Type.OBJECT, type, mv, compileContext);
    }
}

---

From source file:org.kantega.notsoserial.CreateBytesIT.java

License:Apache License

private byte[] createTransletBytes() {

    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "com/example/InvokingTranslet", null,
            Type.getType(AbstractTranslet.class).getInternalName(),
            new String[] { Type.getType(Serializable.class).getInternalName() });

    MethodVisitor init = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
    init.visitCode();//ww  w. ja va2s  .c om
    init.visitVarInsn(Opcodes.ALOAD, 0);
    init.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getType(AbstractTranslet.class).getInternalName(),
            "<init>", "()V");
    init.visitVarInsn(Opcodes.ALOAD, 0);
    init.visitIntInsn(Opcodes.BIPUSH, 101);
    init.visitFieldInsn(Opcodes.PUTFIELD, Type.getType(AbstractTranslet.class).getInternalName(),
            "transletVersion", "I");
    init.visitInsn(Opcodes.RETURN);
    init.visitMaxs(2, 2);
    init.visitEnd();

    MethodVisitor transformMethod = cw.visitMethod(Opcodes.ACC_PUBLIC, "transform",
            Type.getMethodDescriptor(Type.VOID_TYPE,
                    new Type[] { Type.getType(DOM.class), Type.getType(DTMAxisIterator.class) }),
            null, new String[] { Type.getType(TransletException.class).getInternalName() });

    transformMethod.visitCode();
    transformMethod.visitInsn(Opcodes.RETURN);
    transformMethod.visitEnd();

    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_STATIC, "<clinit>", "()V", null, null);
    mv.visitCode();
    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
    mv.visitLdcInsn("HMM..");
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
    mv.visitLdcInsn("pwned");
    mv.visitLdcInsn("true");
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/System", "setProperty",
            "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;");
    mv.visitInsn(Opcodes.POP);
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(2, 0);
    mv.visitEnd();
    cw.visitEnd();

    return cw.toByteArray();
}

---

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