Package org.codehaus.groovy.classgen.asm.CompileStack

Examples of org.codehaus.groovy.classgen.asm.CompileStack.BlockRecorder

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        final Statement finallyStatement = statement.getFinallyStatement();

        // start try block, label needed for exception table
        Label tryStart = new Label();
        mv.visitLabel(tryStart);
        BlockRecorder tryBlock = makeBlockRecorder(finallyStatement);
        tryBlock.startRange(tryStart);

        tryStatement.visit(controller.getAcg());

        // goto finally part
        Label finallyStart = new Label();
        mv.visitJumpInsn(GOTO, finallyStart);

        Label tryEnd = new Label();
        mv.visitLabel(tryEnd);
        tryBlock.closeRange(tryEnd);
        // pop for "makeBlockRecorder(finallyStatement)"
        controller.getCompileStack().pop();

        BlockRecorder catches = makeBlockRecorder(finallyStatement);
        for (CatchStatement catchStatement : statement.getCatchStatements()) {
            ClassNode exceptionType = catchStatement.getExceptionType();
            String exceptionTypeInternalName = BytecodeHelper.getClassInternalName(exceptionType);

            // start catch block, label needed for exception table
            Label catchStart = new Label();
            mv.visitLabel(catchStart);
            catches.startRange(catchStart);

            // create exception variable and store the exception
            Parameter exceptionVariable = catchStatement.getVariable();
            compileStack.pushState();
            compileStack.defineVariable(exceptionVariable, true);
            // handle catch body
            catchStatement.visit(controller.getAcg());
            // place holder to avoid problems with empty catch blocks
            mv.visitInsn(NOP);
            // pop for the variable
            controller.getCompileStack().pop();

            // end of catch
            Label catchEnd = new Label();
            mv.visitLabel(catchEnd);
            catches.closeRange(catchEnd);

            // goto finally start
            mv.visitJumpInsn(GOTO, finallyStart);
            compileStack.writeExceptionTable(tryBlock, catchStart, exceptionTypeInternalName);
        }
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        mv.visitLabel(skipCatchAll);
    }
   
    private BlockRecorder makeBlockRecorder(final Statement finallyStatement) {
        final BlockRecorder block = new BlockRecorder();
        Runnable tryRunner = new Runnable() {
            public void run() {
                controller.getCompileStack().pushBlockRecorderVisit(block);
                finallyStatement.visit(controller.getAcg());
                controller.getCompileStack().popBlockRecorderVisit(block);
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            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);
        compileStack.pop(); //pop fb

        finallyPart.run();
        mv.visitJumpInsn(GOTO, synchronizedEnd);
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        final Statement finallyStatement = statement.getFinallyStatement();

        // start try block, label needed for exception table
        Label tryStart = new Label();
        mv.visitLabel(tryStart);
        BlockRecorder tryBlock = makeBlockRecorder(finallyStatement);
        tryBlock.startRange(tryStart);

        tryStatement.visit(controller.getAcg());

        // goto finally part
        Label finallyStart = new Label();
        mv.visitJumpInsn(GOTO, finallyStart);

        Label tryEnd = new Label();
        mv.visitLabel(tryEnd);
        tryBlock.closeRange(tryEnd);
        // pop for "makeBlockRecorder(finallyStatement)"
        controller.getCompileStack().pop();

        BlockRecorder catches = makeBlockRecorder(finallyStatement);
        for (CatchStatement catchStatement : statement.getCatchStatements()) {
            ClassNode exceptionType = catchStatement.getExceptionType();
            String exceptionTypeInternalName = BytecodeHelper.getClassInternalName(exceptionType);

            // start catch block, label needed for exception table
            Label catchStart = new Label();
            mv.visitLabel(catchStart);
            catches.startRange(catchStart);

            // create exception variable and store the exception
            Parameter exceptionVariable = catchStatement.getVariable();
            compileStack.pushState();
            compileStack.defineVariable(exceptionVariable, true);
            // handle catch body
            catchStatement.visit(controller.getAcg());
            // place holder to avoid problems with empty catch blocks
            mv.visitInsn(NOP);
            // pop for the variable
            controller.getCompileStack().pop();

            // end of catch
            Label catchEnd = new Label();
            mv.visitLabel(catchEnd);
            catches.closeRange(catchEnd);

            // goto finally start
            mv.visitJumpInsn(GOTO, finallyStart);
            compileStack.writeExceptionTable(tryBlock, catchStart, exceptionTypeInternalName);
        }
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        mv.visitLabel(skipCatchAll);
    }
   
    private BlockRecorder makeBlockRecorder(final Statement finallyStatement) {
        final BlockRecorder block = new BlockRecorder();
        Runnable tryRunner = new Runnable() {
            public void run() {
                controller.getCompileStack().pushBlockRecorderVisit(block);
                finallyStatement.visit(controller.getAcg());
                controller.getCompileStack().popBlockRecorderVisit(block);
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            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);
        compileStack.pop(); //pop fb

        finallyPart.run();
        mv.visitJumpInsn(GOTO, synchronizedEnd);
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Related Classes of org.codehaus.groovy.classgen.asm.CompileStack.BlockRecorder

  • org.codehaus.groovy.classgen.asm.StatementWriter
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