Examples with Label org.mvel2.asm.Label used on opensource projects

Example 21 with Label

use of org.mvel2.asm.Label in project mvel by mvel.

the class CheckMethodAdapter method visitMaxs.

@Override
public void visitMaxs(final int maxStack, final int maxLocals) {
    checkStartCode();
    checkEndCode();
    endCode = true;
    for (Label l : usedLabels) {
        if (labels.get(l) == null) {
            throw new IllegalStateException("Undefined label used");
        }
    }
    for (int i = 0; i < handlers.size(); ) {
        Integer start = labels.get(handlers.get(i++));
        Integer end = labels.get(handlers.get(i++));
        if (start == null || end == null) {
            throw new IllegalStateException("Undefined try catch block labels");
        }
        if (end.intValue() <= start.intValue()) {
            throw new IllegalStateException("Emty try catch block handler range");
        }
    }
    checkUnsignedShort(maxStack, "Invalid max stack");
    checkUnsignedShort(maxLocals, "Invalid max locals");
    super.visitMaxs(maxStack, maxLocals);
}

Example 22 with Label

use of org.mvel2.asm.Label in project mvel by mvel.

the class Textifier method visitLocalVariable.

@Override
public void visitLocalVariable(final String name, final String desc, final String signature, final Label start, final Label end, final int index) {
    buf.setLength(0);
    buf.append(tab2).append("LOCALVARIABLE ").append(name).append(' ');
    appendDescriptor(FIELD_DESCRIPTOR, desc);
    buf.append(' ');
    appendLabel(start);
    buf.append(' ');
    appendLabel(end);
    buf.append(' ').append(index).append('\n');
    if (signature != null) {
        buf.append(tab2);
        appendDescriptor(FIELD_SIGNATURE, signature);
        TraceSignatureVisitor sv = new TraceSignatureVisitor(0);
        SignatureReader r = new SignatureReader(signature);
        r.acceptType(sv);
        buf.append(tab2).append("// declaration: ").append(sv.getDeclaration()).append('\n');
    }
    text.add(buf.toString());
}

Example 23 with Label

use of org.mvel2.asm.Label in project mvel by mvel.

the class TraceMethodVisitor method visitLocalVariableAnnotation.

@Override
public AnnotationVisitor visitLocalVariableAnnotation(int typeRef, TypePath typePath, Label[] start, Label[] end, int[] index, String desc, boolean visible) {
    Printer p = this.p.visitLocalVariableAnnotation(typeRef, typePath, start, end, index, desc, visible);
    AnnotationVisitor av = mv == null ? null : mv.visitLocalVariableAnnotation(typeRef, typePath, start, end, index, desc, visible);
    return new TraceAnnotationVisitor(av, p);
}

Example 24 with Label

use of org.mvel2.asm.Label in project mvel by mvel.

the class AnalyzerAdapter method visitTypeInsn.

@Override
public void visitTypeInsn(final int opcode, final String type) {
    if (opcode == Opcodes.NEW) {
        if (labels == null) {
            Label l = new Label();
            labels = new ArrayList<Label>(3);
            labels.add(l);
            if (mv != null) {
                mv.visitLabel(l);
            }
        }
        for (int i = 0; i < labels.size(); ++i) {
            uninitializedTypes.put(labels.get(i), type);
        }
    }
    if (mv != null) {
        mv.visitTypeInsn(opcode, type);
    }
    execute(opcode, 0, type);
}

Example 25 with Label

use of org.mvel2.asm.Label in project mvel by mvel.

the class GeneratorAdapter method tableSwitch.

/**
 * Generates the instructions for a switch statement.
 *
 * @param keys
 *            the switch case keys.
 * @param generator
 *            a generator to generate the code for the switch cases.
 * @param useTable
 *            <tt>true</tt> to use a TABLESWITCH instruction, or
 *            <tt>false</tt> to use a LOOKUPSWITCH instruction.
 */
public void tableSwitch(final int[] keys, final TableSwitchGenerator generator, final boolean useTable) {
    for (int i = 1; i < keys.length; ++i) {
        if (keys[i] < keys[i - 1]) {
            throw new IllegalArgumentException("keys must be sorted ascending");
        }
    }
    Label def = newLabel();
    Label end = newLabel();
    if (keys.length > 0) {
        int len = keys.length;
        int min = keys[0];
        int max = keys[len - 1];
        int range = max - min + 1;
        if (useTable) {
            Label[] labels = new Label[range];
            Arrays.fill(labels, def);
            for (int i = 0; i < len; ++i) {
                labels[keys[i] - min] = newLabel();
            }
            mv.visitTableSwitchInsn(min, max, def, labels);
            for (int i = 0; i < range; ++i) {
                Label label = labels[i];
                if (label != def) {
                    mark(label);
                    generator.generateCase(i + min, end);
                }
            }
        } else {
            Label[] labels = new Label[len];
            for (int i = 0; i < len; ++i) {
                labels[i] = newLabel();
            }
            mv.visitLookupSwitchInsn(def, keys, labels);
            for (int i = 0; i < len; ++i) {
                mark(labels[i]);
                generator.generateCase(keys[i], end);
            }
        }
    }
    mark(def);
    generator.generateDefault();
    mark(end);
}