Example usage for org.objectweb.asm Opcodes ARETURN

Introduction

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

Prototype

int ARETURN

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

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Usage

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

License:Open Source License

@Test
public void testGenerateArgumentArray() throws Exception {
    final ClassWriter writer = new ClassWriter(0);
    writer.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "Sample", null, "java/lang/Object",
            new String[] { Type.getInternalName(Callable.class) });

    // Constructor
    MethodVisitor mv = writer.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, new String[0]);
    mv.visitCode();//from   w  ww.  j  a va 2  s.  com
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();

    // call()
    mv = writer.visitMethod(Opcodes.ACC_PUBLIC, "call", "()Ljava/lang/Object;", null, new String[0]);
    mv.visitCode();
    RuntimeData.generateArgumentArray(1000, "Sample", 15, mv);
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitMaxs(5, 1);
    mv.visitEnd();

    writer.visitEnd();
    final TargetLoader loader = new TargetLoader("Sample", writer.toByteArray());
    Callable<?> callable = (Callable<?>) loader.newTargetInstance();
    final Object[] args = (Object[]) callable.call();
    assertEquals(3, args.length, 0.0);
    assertEquals(Long.valueOf(1000), args[0]);
    assertEquals("Sample", args[1]);
    assertEquals(Integer.valueOf(15), args[2]);
}

---

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

License:Open Source License

@Test
public void testGenerateAccessCall() throws Exception {
    final boolean[] probes = data.getExecutionData(Long.valueOf(1234), "Sample", 5).getProbes();

    final ClassWriter writer = new ClassWriter(0);
    writer.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "Sample", null, "java/lang/Object",
            new String[] { Type.getInternalName(Callable.class) });

    // Constructor
    MethodVisitor mv = writer.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "(Ljava/lang/Object;)V", null,
            new String[0]);
    mv.visitCode();/*  w  w  w .j a v a2  s  .  c o  m*/
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitFieldInsn(Opcodes.PUTFIELD, "Sample", "access", "Ljava/lang/Object;");
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(2, 2);
    mv.visitEnd();

    // call()
    mv = writer.visitMethod(Opcodes.ACC_PUBLIC, "call", "()Ljava/lang/Object;", null, new String[0]);
    mv.visitCode();
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitFieldInsn(Opcodes.GETFIELD, "Sample", "access", "Ljava/lang/Object;");
    RuntimeData.generateAccessCall(1234, "Sample", 5, mv);
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitMaxs(6, 1);
    mv.visitEnd();

    writer.visitField(Opcodes.ACC_PRIVATE, "access", "Ljava/lang/Object;", null, null);

    writer.visitEnd();
    final TargetLoader loader = new TargetLoader("Sample", writer.toByteArray());
    Callable<?> callable = (Callable<?>) loader.getTargetClass().getConstructor(Object.class).newInstance(data);
    assertSame(probes, callable.call());
}

---

From source file:org.jacoco.core.test.validation.java5.StructuredLockingTest.java

License:Open Source License

private void assertStructuredLocking(String owner, MethodNode mn) throws Exception {
    Analyzer<BasicValue> analyzer = new Analyzer<BasicValue>(new BasicInterpreter()) {

        @Override/* w  w  w  .  j ava 2s  .c  o m*/
        protected Frame<BasicValue> newFrame(int nLocals, int nStack) {
            return new LockFrame(nLocals, nStack);
        }

        @Override
        protected Frame<BasicValue> newFrame(Frame<? extends BasicValue> src) {
            return new LockFrame(src);
        }
    };

    Frame<BasicValue>[] frames = analyzer.analyze(owner, mn);

    // Make sure no locks are left when method exits:
    for (int i = 0; i < frames.length; i++) {
        AbstractInsnNode insn = mn.instructions.get(i);
        switch (insn.getOpcode()) {
        case Opcodes.IRETURN:
        case Opcodes.LRETURN:
        case Opcodes.FRETURN:
        case Opcodes.DRETURN:
        case Opcodes.ARETURN:
        case Opcodes.RETURN:
            ((LockFrame) frames[i]).assertNoLock("Exit with lock");
            break;
        case Opcodes.ATHROW:
            List<TryCatchBlockNode> handlers = analyzer.getHandlers(i);
            if (handlers == null || handlers.isEmpty()) {
                ((LockFrame) frames[i]).assertNoLock("Exit with lock");
            }
            break;
        }
    }

    // Only instructions protected by a catch-all handler can hold locks:
    for (int i = 0; i < frames.length; i++) {
        AbstractInsnNode insn = mn.instructions.get(i);
        if (insn.getOpcode() > 0) {
            boolean catchAll = false;
            List<TryCatchBlockNode> handlers = analyzer.getHandlers(i);
            if (handlers != null) {
                for (TryCatchBlockNode node : handlers) {
                    catchAll |= node.type == null;
                }
            }
            if (!catchAll) {
                ((LockFrame) frames[i]).assertNoLock("No handlers for insn with lock");
            }
        }
    }

}

---

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

License:Open Source License

@Override
public void visitInsn(int opcode) {
    super.visitInsn(opcode);
    // look for interesting instructions which need inserting into the CFG
    switch (opcode) {
    case Opcodes.IRETURN:
    case Opcodes.LRETURN:
    case Opcodes.FRETURN:
    case Opcodes.DRETURN:
    case Opcodes.ARETURN:
    case Opcodes.RETURN:
    case Opcodes.ATHROW: {
        // add this instruction to the current block and then start a new current block
        cfg.add(opcode);//from   w ww  . j a v  a 2s .co m
        Label newStart = super.newLabel();
        // must call split before visiting the label
        cfg.split(newStart);
        visitLabel(newStart);
    }
        break;
    case Opcodes.MONITORENTER:
    case Opcodes.MONITOREXIT: {
        // just add this instruction to the current block
        cfg.add(opcode);
    }
        break;
    default: {
        cfg.add(opcode);
    }
    }
}

---

From source file:org.jooby.internal.apitool.BytecodeRouteParser.java

License:Apache License

@SuppressWarnings("unchecked")
private java.lang.reflect.Type returnType(final ClassLoader loader, final MethodNode m) throws Exception {
    return new Insns(m).last().prev().filter(and(is(InsnNode.class), opcode(Opcodes.ARETURN))).findFirst()
            .map(AbstractInsnNode::getPrevious).map(previous -> {
                /** return 1; return true; return new Foo(); */
                if (previous instanceof MethodInsnNode) {
                    MethodInsnNode minnsn = ((MethodInsnNode) previous);
                    if (minnsn.name.equals("<init>")) {
                        return loadType(loader, minnsn.owner);
                    }/*from ww  w  . j  a v a2  s . c  o m*/
                    String desc = minnsn.desc;
                    java.lang.reflect.Type type = TypeDescriptorParser.parse(loader, desc);
                    if (type.getTypeName().equals(Result.class.getName())) {
                        return new TypeWithStatus(type, statusCodeFor(minnsn));
                    }
                    return type;
                }
                /** return "String" | int | double */
                if (previous instanceof LdcInsnNode) {
                    Object cst = ((LdcInsnNode) previous).cst;
                    if (cst instanceof Type) {
                        return TypeDescriptorParser.parse(loader, ((Type) cst).getDescriptor());
                    }
                    return cst.getClass();
                }
                /** return variable */
                if (previous instanceof VarInsnNode) {
                    VarInsnNode varInsn = (VarInsnNode) previous;
                    return localVariable(loader, m, varInsn);
                }

                return Object.class;
            }).orElse(Object.class);
}

---

From source file:org.lambdamatic.analyzer.ast.LambdaExpressionReader.java

License:Open Source License

/**
 * Reads the current {@link InsnNode} instruction and returns a {@link Statement} or {@code null}
 * if the instruction is not a full statement (in that case, the instruction is stored in the
 * given Expression {@link Stack})./*from w w  w  . ja v  a2s.co  m*/
 * 
 * @param insnNode the instruction to read
 * @param expressionStack the expression stack to put on or pop from.
 * @param localVariables the local variables
 * @return a {@link List} of {@link Statement} or empty list if no {@link Statement} was created
 *         after reading the current instruction.
 * @see <a href="https://en.wikipedia.org/wiki/Java_bytecode_instruction_listings">Java bytcode
 *      instruction listings on Wikipedia</a>
 */
private List<Statement> readInstruction(final InsnCursor insnCursor, final Stack<Expression> expressionStack,
        final List<CapturedArgument> capturedArguments, final LocalVariables localVariables) {
    final List<Statement> statements = new ArrayList<>();
    final AbstractInsnNode insnNode = insnCursor.getCurrent();
    switch (insnNode.getOpcode()) {
    // return a reference from a method
    case Opcodes.ARETURN:
        // return an integer from a method
    case Opcodes.IRETURN:
        statements.add(new ReturnStatement(expressionStack.pop()));
        break;
    // return void from method
    case Opcodes.RETURN:
        // wrap all pending expressions into ExpressionStatements
        while (!expressionStack.isEmpty()) {
            final Expression pendingExpression = expressionStack.pop();
            statements.add(new ExpressionStatement(pendingExpression));
        }
        break;
    // push a null reference onto the stack
    case Opcodes.ACONST_NULL:
        expressionStack.add(new NullLiteral());
        break;
    // load the int value 0 onto the stack
    case Opcodes.ICONST_0:
        // applies for byte, short, int and boolean
        expressionStack.add(new NumberLiteral(0));
        break;
    // load the int value 1 onto the stack
    case Opcodes.ICONST_1:
        // applies for byte, short, int and boolean
        expressionStack.add(new NumberLiteral(1));
        break;
    // load the int value 2 onto the stack
    case Opcodes.ICONST_2:
        expressionStack.add(new NumberLiteral(2));
        break;
    // load the int value 3 onto the stack
    case Opcodes.ICONST_3:
        expressionStack.add(new NumberLiteral(3));
        break;
    // load the int value 4 onto the stack
    case Opcodes.ICONST_4:
        expressionStack.add(new NumberLiteral(4));
        break;
    // load the int value 5 onto the stack
    case Opcodes.ICONST_5:
        expressionStack.add(new NumberLiteral(5));
        break;
    // push the long 0 onto the stack
    case Opcodes.LCONST_0:
        expressionStack.add(new NumberLiteral(0L));
        break;
    // push the long 1 onto the stack
    case Opcodes.LCONST_1:
        expressionStack.add(new NumberLiteral(1L));
        break;
    // push the 0.0f onto the stack
    case Opcodes.FCONST_0:
        expressionStack.add(new NumberLiteral(0f));
        break;
    // push the 1.0f onto the stack
    case Opcodes.FCONST_1:
        expressionStack.add(new NumberLiteral(1f));
        break;
    // push the 2.0f onto the stack
    case Opcodes.FCONST_2:
        expressionStack.add(new NumberLiteral(2f));
        break;
    // push the constant 0.0 onto the stack
    case Opcodes.DCONST_0:
        expressionStack.add(new NumberLiteral(0d));
        break;
    // push the constant 1.0 onto the stack
    case Opcodes.DCONST_1:
        expressionStack.add(new NumberLiteral(1d));
        break;
    // compare two longs values
    case Opcodes.LCMP:
        // compare two doubles
    case Opcodes.DCMPL:
        // compare two doubles
    case Opcodes.DCMPG:
        // compare two floats
    case Opcodes.FCMPL:
        // compare two floats
    case Opcodes.FCMPG:
        statements.addAll(
                readJumpInstruction(insnCursor.next(), expressionStack, capturedArguments, localVariables));
        break;
    // add 2 ints
    case Opcodes.IADD:
        expressionStack.add(readOperation(Operator.ADD, expressionStack));
        break;
    // int subtract
    case Opcodes.ISUB:
        expressionStack.add(readOperation(Operator.SUBTRACT, expressionStack));
        break;
    // multiply 2 integers
    case Opcodes.IMUL:
        expressionStack.add(readOperation(Operator.MULTIPLY, expressionStack));
        break;
    // divide 2 integers
    case Opcodes.IDIV:
        expressionStack.add(readOperation(Operator.DIVIDE, expressionStack));
        break;
    // negate int
    case Opcodes.INEG:
        expressionStack.add(inverseInteger(expressionStack));
        break;
    // discard the top value on the stack
    case Opcodes.POP:
        statements.add(new ExpressionStatement(expressionStack.pop()));
        break;
    // duplicate the value on top of the stack
    case Opcodes.DUP:
        expressionStack.push(expressionStack.peek());
        break;
    // insert a copy of the top value into the stack two values from the top.
    case Opcodes.DUP_X1:
        expressionStack.add(expressionStack.size() - 2, expressionStack.peek());
        break;
    // store into a reference in an array
    case Opcodes.AASTORE:
        readArrayStoreInstruction(insnNode, expressionStack);
        break;
    // converts Float to Double -> ignored.
    case Opcodes.F2D:
        break;
    default:
        throw new AnalyzeException(
                "Bytecode instruction with OpCode '" + insnNode.getOpcode() + "' is not supported.");
    }
    return statements;
}

---

From source file:org.mbte.groovypp.compiler.bytecode.BytecodeExpr.java

License:Apache License

public static void doReturn(MethodVisitor mv, ClassNode returnType) {
    if (returnType == double_TYPE) {
        mv.visitInsn(Opcodes.DRETURN);// w ww  . j  a  v  a2s  . c  o m
    } else if (returnType == float_TYPE) {
        mv.visitInsn(Opcodes.FRETURN);
    } else if (returnType == long_TYPE) {
        mv.visitInsn(Opcodes.LRETURN);
    } else if (returnType == boolean_TYPE || returnType == char_TYPE || returnType == byte_TYPE
            || returnType == int_TYPE || returnType == short_TYPE) {
        //byte,short,boolean,int are all IRETURN
        mv.visitInsn(Opcodes.IRETURN);
    } else if (returnType == VOID_TYPE) {
        mv.visitInsn(Opcodes.RETURN);
    } else {
        mv.visitInsn(Opcodes.ARETURN);
    }

}

---

From source file:org.mbte.groovypp.compiler.ClosureUtil.java

License:Apache License

public static void createClosureConstructor(final ClassNode newType, final Parameter[] constrParams,
        Expression superArgs, CompilerTransformer compiler) {

    final ClassNode superClass = newType.getSuperClass();

    final Parameter[] finalConstrParams;
    final ArgumentListExpression superCallArgs = new ArgumentListExpression();
    if (superArgs != null) {
        final ArgumentListExpression args = (ArgumentListExpression) superArgs;
        if (args.getExpressions().size() > 0) {
            Parameter[] newParams = new Parameter[constrParams.length + args.getExpressions().size()];
            System.arraycopy(constrParams, 0, newParams, 0, constrParams.length);
            for (int i = 0; i != args.getExpressions().size(); ++i) {
                final Parameter parameter = new Parameter(args.getExpressions().get(i).getType(),
                        "$super$param$" + i);
                newParams[i + constrParams.length] = parameter;
                superCallArgs.addExpression(new VariableExpression(parameter));
            }// w ww  . java 2  s .  c o  m
            finalConstrParams = newParams;
        } else
            finalConstrParams = constrParams;
    } else {
        if (superClass == ClassHelper.CLOSURE_TYPE) {
            if (constrParams.length > 0) {
                superCallArgs.addExpression(new VariableExpression(constrParams[0]));
                superCallArgs.addExpression(new VariableExpression(constrParams[0]));
            } else if (compiler.methodNode.isStatic() && !compiler.classNode.getName().endsWith("$TraitImpl")) {
                ClassNode cn = compiler.classNode;
                superCallArgs.addExpression(new ClassExpression(cn));
                superCallArgs.addExpression(new ClassExpression(getOutermostClass(cn)));
            } else {
                superCallArgs.addExpression(ConstantExpression.NULL);
                superCallArgs.addExpression(ConstantExpression.NULL);
            }
        }
        finalConstrParams = constrParams;
    }

    ConstructorCallExpression superCall = new ConstructorCallExpression(ClassNode.SUPER, superCallArgs);

    BytecodeSequence fieldInit = new BytecodeSequence(new BytecodeInstruction() {
        public void visit(MethodVisitor mv) {
            for (int i = 0, k = 1; i != constrParams.length; i++) {
                mv.visitVarInsn(Opcodes.ALOAD, 0);

                final ClassNode type = constrParams[i].getType();
                if (ClassHelper.isPrimitiveType(type)) {
                    if (type == ClassHelper.long_TYPE) {
                        mv.visitVarInsn(Opcodes.LLOAD, k++);
                        k++;
                    } else if (type == ClassHelper.double_TYPE) {
                        mv.visitVarInsn(Opcodes.DLOAD, k++);
                        k++;
                    } else if (type == ClassHelper.float_TYPE) {
                        mv.visitVarInsn(Opcodes.FLOAD, k++);
                    } else {
                        mv.visitVarInsn(Opcodes.ILOAD, k++);
                    }
                } else {
                    mv.visitVarInsn(Opcodes.ALOAD, k++);
                }
                mv.visitFieldInsn(Opcodes.PUTFIELD, BytecodeHelper.getClassInternalName(newType),
                        constrParams[i].getName(), BytecodeHelper.getTypeDescription(type));
            }
            mv.visitInsn(Opcodes.RETURN);
        }
    });

    BlockStatement code = new BlockStatement();
    code.addStatement(new ExpressionStatement(superCall));

    ConstructorNode cn = new ConstructorNode(Opcodes.ACC_PUBLIC, finalConstrParams, ClassNode.EMPTY_ARRAY,
            code);
    newType.addConstructor(cn);

    code.addStatement(fieldInit);

    CleaningVerifier.getCleaningVerifier().visitClass(newType);

    compiler.replaceMethodCode(newType, cn);

    if (newType.getOuterClass() != null && newType.getMethods("methodMissing").isEmpty()) {
        final ClassNode this0Type = (!compiler.methodNode.isStatic()
                || compiler.classNode.getName().endsWith("$TraitImpl")) ? newType.getOuterClass()
                        : ClassHelper.CLASS_Type;
        newType.addMethod("methodMissing", Opcodes.ACC_PUBLIC, ClassHelper.OBJECT_TYPE,
                new Parameter[] { new Parameter(ClassHelper.STRING_TYPE, "name"),
                        new Parameter(ClassHelper.OBJECT_TYPE, "args") },
                ClassNode.EMPTY_ARRAY, new BytecodeSequence(new BytecodeInstruction() {
                    public void visit(MethodVisitor mv) {
                        mv.visitVarInsn(Opcodes.ALOAD, 0);
                        mv.visitFieldInsn(Opcodes.GETFIELD, BytecodeHelper.getClassInternalName(newType),
                                "this$0", BytecodeHelper.getTypeDescription(this0Type));
                        mv.visitVarInsn(Opcodes.ALOAD, 1);
                        mv.visitVarInsn(Opcodes.ALOAD, 2);
                        mv.visitMethodInsn(Opcodes.INVOKESTATIC, "org/codehaus/groovy/runtime/InvokerHelper",
                                "invokeMethod",
                                "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;");
                        mv.visitInsn(Opcodes.ARETURN);
                    }
                }));
    }
}

---

From source file:org.openquark.cal.internal.javamodel.AsmJavaBytecodeGenerator.java

License:Open Source License

/**    
 * @param type//from   w ww.ja va2 s  .co  m
 * @return the RETURN, IRETURN,... op code, depending on type.
 */
private static int getReturnOpCode(JavaTypeName type) {

    switch (type.getTag()) {
    case JavaTypeName.VOID_TAG:
        return Opcodes.RETURN;

    case JavaTypeName.BOOLEAN_TAG:
    case JavaTypeName.BYTE_TAG:
    case JavaTypeName.SHORT_TAG:
    case JavaTypeName.CHAR_TAG:
    case JavaTypeName.INT_TAG:
        return Opcodes.IRETURN;

    case JavaTypeName.LONG_TAG:
        return Opcodes.LRETURN;

    case JavaTypeName.DOUBLE_TAG:
        return Opcodes.DRETURN;

    case JavaTypeName.FLOAT_TAG:
        return Opcodes.FRETURN;

    case JavaTypeName.ARRAY_TAG:
    case JavaTypeName.OBJECT_TAG:
        return Opcodes.ARETURN;

    default: {
        throw new IllegalArgumentException("invalid type: " + type);
    }
    }
}

---

From source file:org.parboiled.compiler.notNullVerification.MyMethodAdapter.java

License:Apache License

@Override
public void visitInsn(int opcode) {
    if (opcode == Opcodes.ARETURN && myIsNotNull) {
        mv.visitInsn(Opcodes.DUP);//from w  w  w .  ja  va2 s.c  o  m
        if (myThrowLabel == null) {
            Label skipLabel = new Label();
            mv.visitJumpInsn(Opcodes.IFNONNULL, skipLabel);
            myThrowLabel = new Label();
            mv.visitLabel(myThrowLabel);
            generateThrow("java/lang/IllegalStateException",
                    "@NotNull method " + getFullMethodName() + " must not return null", skipLabel);
        } else {
            mv.visitJumpInsn(Opcodes.IFNULL, myThrowLabel);
        }
    }

    mv.visitInsn(opcode);
}

---

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