Examples with MethodVisitor org.objectweb.asm.MethodVisitor used on opensource projects

Example 41 with MethodVisitor

use of org.objectweb.asm.MethodVisitor in project groovy-core by groovy.

the class StatementWriter method writeSynchronized.

public void writeSynchronized(SynchronizedStatement statement) {
    controller.getAcg().onLineNumber(statement, "visitSynchronizedStatement");
    writeStatementLabel(statement);
    final MethodVisitor mv = controller.getMethodVisitor();
    CompileStack compileStack = controller.getCompileStack();
    statement.getExpression().visit(controller.getAcg());
    controller.getOperandStack().box();
    final int index = compileStack.defineTemporaryVariable("synchronized", ClassHelper.OBJECT_TYPE, true);
    final Label synchronizedStart = new Label();
    final Label synchronizedEnd = new Label();
    final Label catchAll = new Label();
    mv.visitVarInsn(ALOAD, index);
    mv.visitInsn(MONITORENTER);
    mv.visitLabel(synchronizedStart);
    // place holder for "empty" synchronized blocks, for example
    // if there is only a break/continue.
    mv.visitInsn(NOP);
    Runnable finallyPart = new Runnable() {

        public void run() {
            mv.visitVarInsn(ALOAD, index);
            mv.visitInsn(MONITOREXIT);
        }
    };
    BlockRecorder fb = new BlockRecorder(finallyPart);
    fb.startRange(synchronizedStart);
    compileStack.pushBlockRecorder(fb);
    statement.getCode().visit(controller.getAcg());
    fb.closeRange(catchAll);
    compileStack.writeExceptionTable(fb, catchAll, null);
    //pop fb
    compileStack.pop();
    finallyPart.run();
    mv.visitJumpInsn(GOTO, synchronizedEnd);
    mv.visitLabel(catchAll);
    finallyPart.run();
    mv.visitInsn(ATHROW);
    mv.visitLabel(synchronizedEnd);
}

Example 42 with MethodVisitor

use of org.objectweb.asm.MethodVisitor in project groovy-core by groovy.

the class StatementWriter method writeReturn.

public void writeReturn(ReturnStatement statement) {
    controller.getAcg().onLineNumber(statement, "visitReturnStatement");
    writeStatementLabel(statement);
    MethodVisitor mv = controller.getMethodVisitor();
    OperandStack operandStack = controller.getOperandStack();
    ClassNode returnType = controller.getReturnType();
    if (returnType == ClassHelper.VOID_TYPE) {
        if (!(statement.isReturningNullOrVoid())) {
            //TODO: move to Verifier
            controller.getAcg().throwException("Cannot use return statement with an expression on a method that returns void");
        }
        controller.getCompileStack().applyBlockRecorder();
        mv.visitInsn(RETURN);
        return;
    }
    Expression expression = statement.getExpression();
    expression.visit(controller.getAcg());
    operandStack.doGroovyCast(returnType);
    if (controller.getCompileStack().hasBlockRecorder()) {
        ClassNode type = operandStack.getTopOperand();
        int returnValueIdx = controller.getCompileStack().defineTemporaryVariable("returnValue", returnType, true);
        controller.getCompileStack().applyBlockRecorder();
        operandStack.load(type, returnValueIdx);
    }
    BytecodeHelper.doReturn(mv, returnType);
    operandStack.remove(1);
}

Example 43 with MethodVisitor

use of org.objectweb.asm.MethodVisitor in project groovy-core by groovy.

the class StatementWriter method writeWhileLoop.

public void writeWhileLoop(WhileStatement loop) {
    controller.getAcg().onLineNumber(loop, "visitWhileLoop");
    writeStatementLabel(loop);
    MethodVisitor mv = controller.getMethodVisitor();
    controller.getCompileStack().pushLoop(loop.getStatementLabels());
    Label continueLabel = controller.getCompileStack().getContinueLabel();
    Label breakLabel = controller.getCompileStack().getBreakLabel();
    mv.visitLabel(continueLabel);
    Expression bool = loop.getBooleanExpression();
    boolean boolHandled = false;
    if (bool instanceof ConstantExpression) {
        ConstantExpression constant = (ConstantExpression) bool;
        if (constant.getValue() == Boolean.TRUE) {
            boolHandled = true;
        // do nothing
        } else if (constant.getValue() == Boolean.FALSE) {
            boolHandled = true;
            mv.visitJumpInsn(GOTO, breakLabel);
        }
    }
    if (!boolHandled) {
        bool.visit(controller.getAcg());
        controller.getOperandStack().jump(IFEQ, breakLabel);
    }
    loop.getLoopBlock().visit(controller.getAcg());
    mv.visitJumpInsn(GOTO, continueLabel);
    mv.visitLabel(breakLabel);
    controller.getCompileStack().pop();
}

Example 44 with MethodVisitor

use of org.objectweb.asm.MethodVisitor in project groovy-core by groovy.

the class StaticTypesStatementWriter method writeForInLoop.

@Override
protected void writeForInLoop(final ForStatement loop) {
    controller.getAcg().onLineNumber(loop, "visitForLoop");
    writeStatementLabel(loop);
    CompileStack compileStack = controller.getCompileStack();
    MethodVisitor mv = controller.getMethodVisitor();
    OperandStack operandStack = controller.getOperandStack();
    compileStack.pushLoop(loop.getVariableScope(), loop.getStatementLabels());
    // Identify type of collection
    TypeChooser typeChooser = controller.getTypeChooser();
    Expression collectionExpression = loop.getCollectionExpression();
    ClassNode collectionType = typeChooser.resolveType(collectionExpression, controller.getClassNode());
    Parameter loopVariable = loop.getVariable();
    int size = operandStack.getStackLength();
    if (collectionType.isArray() && loopVariable.getOriginType().equals(collectionType.getComponentType())) {
        writeOptimizedForEachLoop(compileStack, operandStack, mv, loop, collectionExpression, collectionType, loopVariable);
    } else if (ENUMERATION_CLASSNODE.equals(collectionType)) {
        writeEnumerationBasedForEachLoop(compileStack, operandStack, mv, loop, collectionExpression, collectionType, loopVariable);
    } else {
        writeIteratorBasedForEachLoop(compileStack, operandStack, mv, loop, collectionExpression, collectionType, loopVariable);
    }
    operandStack.popDownTo(size);
    compileStack.pop();
}

Example 45 with MethodVisitor

use of org.objectweb.asm.MethodVisitor in project groovy-core by groovy.

the class OperandStack method storeVar.

public void storeVar(BytecodeVariable variable) {
    MethodVisitor mv = controller.getMethodVisitor();
    int idx = variable.getIndex();
    ClassNode type = variable.getType();
    // value is on stack
    if (variable.isHolder()) {
        doGroovyCast(type);
        box();
        mv.visitVarInsn(ALOAD, idx);
        mv.visitTypeInsn(CHECKCAST, "groovy/lang/Reference");
        mv.visitInsn(SWAP);
        mv.visitMethodInsn(INVOKEVIRTUAL, "groovy/lang/Reference", "set", "(Ljava/lang/Object;)V", false);
    } else {
        doGroovyCast(type);
        if (type == ClassHelper.double_TYPE) {
            mv.visitVarInsn(DSTORE, idx);
        } else if (type == ClassHelper.float_TYPE) {
            mv.visitVarInsn(FSTORE, idx);
        } else if (type == ClassHelper.long_TYPE) {
            mv.visitVarInsn(LSTORE, idx);
        } else if (type == ClassHelper.boolean_TYPE || type == ClassHelper.char_TYPE || type == ClassHelper.byte_TYPE || type == ClassHelper.int_TYPE || type == ClassHelper.short_TYPE) {
            mv.visitVarInsn(ISTORE, idx);
        } else {
            mv.visitVarInsn(ASTORE, idx);
        }
    }
    // remove RHS value from operand stack
    remove(1);
}