Examples with LabelNode org.objectweb.asm.tree.LabelNode used on opensource projects

Example 46 with LabelNode

use of org.objectweb.asm.tree.LabelNode in project jacoco by jacoco.

the class SynchronizedFilterTest method javac.

@Test
public void javac() {
    final Label start = new Label();
    final Label end = new Label();
    final Label handler = new Label();
    final Label handlerEnd = new Label();
    m.visitTryCatchBlock(start, end, handler, null);
    m.visitTryCatchBlock(handler, handlerEnd, handler, null);
    m.visitVarInsn(Opcodes.ALOAD, 0);
    m.visitFieldInsn(Opcodes.GETFIELD, "Fun", "lock", "Ljava/lang/Object;");
    m.visitInsn(Opcodes.DUP);
    m.visitVarInsn(Opcodes.ASTORE, 1);
    m.visitInsn(Opcodes.MONITORENTER);
    m.visitLabel(start);
    m.visitInsn(Opcodes.NOP);
    m.visitVarInsn(Opcodes.ALOAD, 1);
    m.visitInsn(Opcodes.MONITOREXIT);
    m.visitLabel(end);
    final Label exit = new Label();
    m.visitJumpInsn(Opcodes.GOTO, exit);
    m.visitLabel(handler);
    m.visitVarInsn(Opcodes.ASTORE, 2);
    m.visitVarInsn(Opcodes.ALOAD, 1);
    m.visitInsn(Opcodes.MONITOREXIT);
    m.visitLabel(handlerEnd);
    m.visitVarInsn(Opcodes.ALOAD, 2);
    m.visitInsn(Opcodes.ATHROW);
    m.visitLabel(exit);
    m.visitInsn(Opcodes.RETURN);
    filter.filter(m, context, output);
    assertIgnored(new Range((LabelNode) handler.info, ((LabelNode) exit.info).getPrevious()));
}

Example 47 with LabelNode

use of org.objectweb.asm.tree.LabelNode in project jphp by jphp-compiler.

the class StmtCompiler method writeLabel.

public LabelNode writeLabel(MethodNode mv, int lineNumber) {
    LabelNode node = new LabelNode(new Label());
    mv.instructions.add(node);
    if (lineNumber != -1)
        mv.instructions.add(new LineNumberNode(lineNumber, node));
    return node;
}

Example 48 with LabelNode

use of org.objectweb.asm.tree.LabelNode in project jphp by jphp-compiler.

the class ForCompiler method write.

@Override
public void write(ForStmtToken token) {
    expr.writeDefineVariables(token.getInitLocal());
    for (ExprStmtToken expr : token.getInitExpr()) {
        this.expr.writeExpression(expr, false, false);
    }
    expr.writeUndefineVariables(token.getInitLocal());
    expr.writeDefineVariables(token.getLocal());
    for (VariableExprToken variable : token.getIterationLocal()) {
        // TODO optimize this for Dynamic Values of variables
        LocalVariable local = method.getLocalVariable(variable.getName());
        local.setValue(null);
    }
    LabelNode start = expr.writeLabel(node, token.getMeta().getStartLine());
    LabelNode iter = new LabelNode();
    LabelNode end = new LabelNode();
    for (Iterator<ExprStmtToken> i = token.getConditionExpr().iterator(); i.hasNext(); ) {
        ExprStmtToken expr = i.next();
        if (i.hasNext()) {
            this.expr.writeExpression(expr, false, false);
        } else {
            this.expr.writeExpression(expr, true, false);
            this.expr.writePopBoolean();
            add(new JumpInsnNode(IFEQ, end));
            this.expr.stackPop();
        }
    }
    method.pushJump(end, iter);
    expr.write(BodyStmtToken.class, token.getBody());
    method.popJump();
    add(iter);
    for (ExprStmtToken expr : token.getIterationExpr()) {
        this.expr.writeExpression(expr, false, false);
    }
    add(new JumpInsnNode(GOTO, start));
    add(end);
    add(new LineNumberNode(token.getMeta().getEndLine(), end));
    expr.writeUndefineVariables(token.getLocal());
}

Example 49 with LabelNode

use of org.objectweb.asm.tree.LabelNode in project jphp by jphp-compiler.

the class GotoCompiler method write.

@Override
public void write(GotoStmtToken token) {
    LabelNode labelNode = method.getOrCreateGotoLabel(token.getLabel().getName());
    LabelStmtToken labelStmtToken = method.statement.findLabel(token.getLabel().getName());
    if (labelStmtToken == null) {
        compiler.getEnvironment().error(token.getLabel().toTraceInfo(compiler.getContext()), "'goto' to undefined label '%s'", token.getLabel().getName());
        return;
    }
    if (labelStmtToken.getLevel() > token.getLevel()) {
        compiler.getEnvironment().error(token.toTraceInfo(compiler.getContext()), "'goto' into loop, switch or finally statement is disallowed");
    }
    add(new JumpInsnNode(GOTO, labelNode));
}

Example 50 with LabelNode

use of org.objectweb.asm.tree.LabelNode in project Bookshelf by Darkhax-Minecraft.

the class InstructionComparator method getImportantList.

// TODO: Add documentation
public static InsnList getImportantList(InsnList list) {
    if (list.size() == 0) {
        return list;
    }
    final HashMap<LabelNode, LabelNode> labels = new HashMap<>();
    for (AbstractInsnNode insn = list.getFirst(); insn != null; insn = insn.getNext()) {
        if (insn instanceof LabelNode) {
            labels.put((LabelNode) insn, (LabelNode) insn);
        }
    }
    final InsnList importantNodeList = new InsnList();
    for (AbstractInsnNode insn = list.getFirst(); insn != null; insn = insn.getNext()) {
        if (insn instanceof LabelNode || insn instanceof LineNumberNode) {
            continue;
        }
        importantNodeList.add(insn.clone(labels));
    }
    return importantNodeList;
}