Example usage for org.objectweb.asm Opcodes ACONST_NULL

Introduction

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

Prototype

int ACONST_NULL

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

Click Source Link

Usage

From source file:org.elasticsearch.plan.a.Writer.java

License:Apache License

@Override
public Void visitDeclvar(final DeclvarContext ctx) {
    final ExpressionMetadata declvaremd = metadata.getExpressionMetadata(ctx);
    final org.objectweb.asm.Type type = declvaremd.to.type;
    final Sort sort = declvaremd.to.sort;
    final int slot = (int) declvaremd.postConst;

    final ExpressionContext exprctx = ctx.expression();
    final boolean initialize = exprctx == null;

    if (!initialize) {
        visit(exprctx);/* ww w .  j a v  a  2 s.c  om*/
    }

    switch (sort) {
    case VOID:
        throw new IllegalStateException(error(ctx) + "Unexpected writer state.");
    case BOOL:
    case BYTE:
    case SHORT:
    case CHAR:
    case INT:
        if (initialize)
            execute.push(0);
        break;
    case LONG:
        if (initialize)
            execute.push(0L);
        break;
    case FLOAT:
        if (initialize)
            execute.push(0.0F);
        break;
    case DOUBLE:
        if (initialize)
            execute.push(0.0);
        break;
    default:
        if (initialize)
            execute.visitInsn(Opcodes.ACONST_NULL);
    }

    execute.visitVarInsn(type.getOpcode(Opcodes.ISTORE), slot);

    return null;
}

---

From source file:org.elasticsearch.plan.a.Writer.java

License:Apache License

@Override
public Void visitNull(final NullContext ctx) {
    final ExpressionMetadata nullemd = metadata.getExpressionMetadata(ctx);

    execute.visitInsn(Opcodes.ACONST_NULL);
    checkWriteCast(nullemd);/*from   w w  w  . jav  a  2s. c  o m*/
    checkWriteBranch(ctx);

    return null;
}

---

From source file:org.evosuite.instrumentation.coverage.DefUseInstrumentation.java

License:Open Source License

private void addCallingObjectInstrumentation(boolean staticContext, InsnList instrumentation) {
    // the object on which the DU is covered is passed by the
    // instrumentation.
    // If we are in a static context, null is passed instead
    if (staticContext) {
        instrumentation.add(new InsnNode(Opcodes.ACONST_NULL));
    } else {/*from   www  . java2s  .  c o m*/
        instrumentation.add(new VarInsnNode(Opcodes.ALOAD, 0)); // "this"
    }
}

---

From source file:org.evosuite.instrumentation.coverage.DefUseInstrumentation.java

License:Open Source License

private void addObjectInstrumentation(BytecodeInstruction instruction, InsnList instrumentation,
        MethodNode mn) {/*ww w . jav a  2 s.  co m*/
    if (instruction.isLocalVariableDefinition()) {
        if (instruction.getASMNode().getOpcode() == Opcodes.ALOAD) {
            instrumentation.add(new InsnNode(Opcodes.DUP));
        } else {
            instrumentation.add(new InsnNode(Opcodes.ACONST_NULL));
        }
    } else if (instruction.isLocalVariableUse()) {
        if (instruction.getASMNode().getOpcode() == Opcodes.ASTORE) {
            instrumentation.add(new InsnNode(Opcodes.DUP));
        } else {
            instrumentation.add(new InsnNode(Opcodes.ACONST_NULL));
        }
    } else if (instruction.isArrayStoreInstruction()) {
        // Object, index, value
        instrumentation.add(new InsnNode(Opcodes.DUP));
        //      } else if(instruction.isArrayLoadInstruction()) {
        //         instrumentation.add(new InsnNode(Opcodes.DUP));
    } else if (instruction.isFieldNodeDU()) {
        // TODO: FieldNodeDU takes care of ArrayStore - why?
        Type type = Type.getType(instruction.getFieldType());
        if (type.getSort() == Type.OBJECT) {
            instrumentation.add(new InsnNode(Opcodes.DUP));
        } else {
            instrumentation.add(new InsnNode(Opcodes.ACONST_NULL));
        }
    } else if (instruction.isMethodCall()) {
        Type type = Type.getReturnType(instruction.getMethodCallDescriptor());
        if (type.getSort() == Type.OBJECT) {
            instrumentation.add(new InsnNode(Opcodes.DUP));
        } else {
            instrumentation.add(new InsnNode(Opcodes.ACONST_NULL));
        }
    }
}

---

From source file:org.evosuite.instrumentation.CreateClassResetClassAdapter.java

License:Open Source License

private void createEmptyStaticReset() {
    logger.info("Creating brand-new static initializer in class {}", className);
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, ClassResetter.STATIC_RESET,
            "()V", null, null);
    mv.visitCode();//from w  w w  .j a v a 2s  .  com
    for (StaticField staticField : static_fields) {

        if (!finalFields.contains(staticField.name)) {

            logger.info("Adding bytecode for initializing field {}", staticField.name);

            if (staticField.value != null) {
                mv.visitLdcInsn(staticField.value);
            } else {
                Type type = Type.getType(staticField.desc);
                switch (type.getSort()) {
                case Type.BOOLEAN:
                case Type.BYTE:
                case Type.CHAR:
                case Type.SHORT:
                case Type.INT:
                    mv.visitInsn(Opcodes.ICONST_0);
                    break;
                case Type.FLOAT:
                    mv.visitInsn(Opcodes.FCONST_0);
                    break;
                case Type.LONG:
                    mv.visitInsn(Opcodes.LCONST_0);
                    break;
                case Type.DOUBLE:
                    mv.visitInsn(Opcodes.DCONST_0);
                    break;
                case Type.ARRAY:
                case Type.OBJECT:
                    mv.visitInsn(Opcodes.ACONST_NULL);
                    break;
                }
            }
            mv.visitFieldInsn(Opcodes.PUTSTATIC, className, staticField.name, staticField.desc);

        }
    }
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();

}

---

From source file:org.evosuite.instrumentation.MethodEntryAdapter.java

License:Open Source License

/** {@inheritDoc} */
@Override// w  ww  .j  a va 2 s .co  m
public void onMethodEnter() {

    if (methodName.equals("<clinit>"))
        return; // FIXXME: Should we call super.onMethodEnter() here?

    mv.visitLdcInsn(className);
    mv.visitLdcInsn(fullMethodName);
    if ((access & Opcodes.ACC_STATIC) > 0) {
        mv.visitInsn(Opcodes.ACONST_NULL);
    } else {
        mv.visitVarInsn(Opcodes.ALOAD, 0);
    }
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, PackageInfo.getNameWithSlash(ExecutionTracer.class),
            "enteredMethod", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/Object;)V", false);

    super.onMethodEnter();
}

---

From source file:org.evosuite.instrumentation.mutation.DeleteField.java

License:Open Source License

private static AbstractInsnNode getDefault(Type type) {
    if (type.equals(Type.BOOLEAN_TYPE)) {
        return new LdcInsnNode(0);
    } else if (type.equals(Type.INT_TYPE)) {
        return new LdcInsnNode(0);
    } else if (type.equals(Type.BYTE_TYPE)) {
        return new LdcInsnNode(0);
    } else if (type.equals(Type.CHAR_TYPE)) {
        return new LdcInsnNode(0);
    } else if (type.equals(Type.DOUBLE_TYPE)) {
        return new LdcInsnNode(0.0);
    } else if (type.equals(Type.FLOAT_TYPE)) {
        return new LdcInsnNode(0.0F);
    } else if (type.equals(Type.INT_TYPE)) {
        return new LdcInsnNode(0);
    } else if (type.equals(Type.LONG_TYPE)) {
        return new LdcInsnNode(0L);
    } else if (type.equals(Type.SHORT_TYPE)) {
        return new LdcInsnNode(0);
    } else if (type.equals(Type.VOID_TYPE)) {
        return new LabelNode();
    } else {/*  w ww.  j a  v a  2 s  .c  o m*/
        return new InsnNode(Opcodes.ACONST_NULL);
    }
}

---

From source file:org.evosuite.runtime.instrumentation.CreateClassResetClassAdapter.java

License:Open Source License

/**
 * Creates an empty __STATIC_RESET method where no <clinit> was found.
 *///from   ww  w.  j a v a 2s.c  om
private void createEmptyStaticReset() {
    logger.info("Creating brand-new static initializer in class " + className);
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC | Opcodes.ACC_SYNTHETIC,
            ClassResetter.STATIC_RESET, "()V", null, null);
    mv.visitCode();
    for (StaticField staticField : static_fields) {

        if (!finalFields.contains(staticField.name) && !staticField.name.startsWith("__cobertura")
                && !staticField.name.startsWith("$jacoco") && !staticField.name.startsWith("$VRc") // Old
        // Emma
        ) {

            logger.info("Adding bytecode for initializing field " + staticField.name);

            if (staticField.value != null) {
                mv.visitLdcInsn(staticField.value);
            } else {
                Type type = Type.getType(staticField.desc);
                switch (type.getSort()) {
                case Type.BOOLEAN:
                case Type.BYTE:
                case Type.CHAR:
                case Type.SHORT:
                case Type.INT:
                    mv.visitInsn(Opcodes.ICONST_0);
                    break;
                case Type.FLOAT:
                    mv.visitInsn(Opcodes.FCONST_0);
                    break;
                case Type.LONG:
                    mv.visitInsn(Opcodes.LCONST_0);
                    break;
                case Type.DOUBLE:
                    mv.visitInsn(Opcodes.DCONST_0);
                    break;
                case Type.ARRAY:
                case Type.OBJECT:
                    mv.visitInsn(Opcodes.ACONST_NULL);
                    break;
                }
            }
            mv.visitFieldInsn(Opcodes.PUTSTATIC, className, staticField.name, staticField.desc);

        }
    }
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();

}

---

From source file:org.evosuite.runtime.instrumentation.CreateClassResetMethodAdapter.java

License:Open Source License

@Override
public void visitCode() {
    super.visitCode();
    for (StaticField staticField : staticFields) {

        if (!finalFields.contains(staticField.name) && !staticField.name.startsWith("__cobertura")
                && !staticField.name.startsWith("$jacoco") && !staticField.name.startsWith("$VRc") // Old Emma
        ) {/* ww w  .  j av a  2  s. c om*/

            if (staticField.value != null) {
                mv.visitLdcInsn(staticField.value);
            } else {
                Type type = Type.getType(staticField.desc);
                switch (type.getSort()) {
                case Type.BOOLEAN:
                case Type.BYTE:
                case Type.CHAR:
                case Type.SHORT:
                case Type.INT:
                    mv.visitInsn(Opcodes.ICONST_0);
                    break;
                case Type.FLOAT:
                    mv.visitInsn(Opcodes.FCONST_0);
                    break;
                case Type.LONG:
                    mv.visitInsn(Opcodes.LCONST_0);
                    break;
                case Type.DOUBLE:
                    mv.visitInsn(Opcodes.DCONST_0);
                    break;
                case Type.ARRAY:
                case Type.OBJECT:
                    mv.visitInsn(Opcodes.ACONST_NULL);
                    break;
                }
            }
            mv.visitFieldInsn(Opcodes.PUTSTATIC, className, staticField.name, staticField.desc);
        }
    }

}

---

From source file:org.evosuite.testcarver.instrument.Instrumenter.java

License:Open Source License

private void instrumentGETXXXFieldAccesses(final ClassNode cn, final String internalClassName,
        final MethodNode methodNode) {
    final InsnList instructions = methodNode.instructions;

    AbstractInsnNode ins = null;/*w w  w.j av a2s .  c o m*/
    FieldInsnNode fieldIns = null;

    for (int i = 0; i < instructions.size(); i++) {
        ins = instructions.get(i);
        if (ins instanceof FieldInsnNode) {
            fieldIns = (FieldInsnNode) ins;

            /*
             * Is field referencing outermost instance? if yes, ignore it
             * http://tns-www.lcs.mit.edu/manuals/java-1.1.1/guide/innerclasses/spec/innerclasses.doc10.html
             */
            if (fieldIns.name.endsWith("$0")) {
                continue;
            }

            final int opcode = ins.getOpcode();
            if (opcode == Opcodes.GETFIELD || opcode == Opcodes.GETSTATIC) {
                final InsnList il = new InsnList();

                if (opcode == Opcodes.GETFIELD) {
                    Type fieldType = Type.getType(fieldIns.desc);
                    if (fieldType.getSize() == 1) {
                        instructions.insertBefore(fieldIns, new InsnNode(Opcodes.DUP));
                        il.add(new InsnNode(Opcodes.SWAP));
                    } else if (fieldType.getSize() == 2) {
                        instructions.insertBefore(fieldIns, new InsnNode(Opcodes.DUP));
                        // v
                        // GETFIELD
                        // v, w
                        il.add(new InsnNode(Opcodes.DUP2_X1));
                        // w, v, w
                        il.add(new InsnNode(Opcodes.POP2));
                        // w, v
                        // -> Call
                        // w
                    }
                } else
                    il.add(new InsnNode(Opcodes.ACONST_NULL));

                il.add(new LdcInsnNode(this.captureId));
                il.add(new LdcInsnNode(fieldIns.owner));
                il.add(new LdcInsnNode(fieldIns.name));
                il.add(new LdcInsnNode(fieldIns.desc));

                il.add(new MethodInsnNode(Opcodes.INVOKESTATIC,
                        PackageInfo.getNameWithSlash(org.evosuite.testcarver.capture.FieldRegistry.class),
                        "notifyReadAccess",
                        "(Ljava/lang/Object;ILjava/lang/String;Ljava/lang/String;Ljava/lang/String;)V"));

                i += il.size();

                instructions.insert(fieldIns, il);
                this.captureId++;
            }
        }
    }
}

---

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