Examples with DexLabel com.googlecode.d2j.DexLabel used on opensource projects

Example 21 with DexLabel

use of com.googlecode.d2j.DexLabel in project dex2jar by pxb1988.

the class Dex2IRConverter method dfs.

private void dfs(BitSet[] exBranch, BitSet handlers, BitSet access, DvmInterpreter<DvmValue> interpreter) {
    currentEmit = preEmit;
    Dex2IrFrame first = initFirstFrame(dexCodeNode, target);
    if (parentCount[0] > 1) {
        merge(first, 0);
    } else {
        frames[0] = first;
    }
    Stack<DexStmtNode> stack = new Stack<>();
    stack.push(insnList.get(0));
    Dex2IrFrame tmp = new Dex2IrFrame(dexCodeNode.totalRegister);
    while (!stack.isEmpty()) {
        DexStmtNode p = stack.pop();
        int index = p.__index;
        if (!access.get(index)) {
            access.set(index);
        } else {
            continue;
        }
        Dex2IrFrame frame = frames[index];
        setCurrentEmit(index);
        if (p instanceof DexLabelStmtNode) {
            emit(getLabel(((DexLabelStmtNode) p).label));
            if (handlers.get(index)) {
                Local ex = newLocal();
                emit(Stmts.nIdentity(ex, Exprs.nExceptionRef("Ljava/lang/Throwable;")));
                frame.setTmp(new DvmValue(ex));
            }
        }
        BitSet ex = exBranch[index];
        if (ex != null) {
            for (int i = ex.nextSetBit(0); i >= 0; i = ex.nextSetBit(i + 1)) {
                merge(frame, i);
                stack.push(insnList.get(i));
            }
        }
        tmp.init(frame);
        try {
            if (p.op != null) {
                switch(p.op) {
                    case RETURN_VOID:
                        emit(nReturnVoid());
                        break;
                    case GOTO:
                    case GOTO_16:
                    case GOTO_32:
                        emit(nGoto(getLabel(((JumpStmtNode) p).label)));
                        break;
                    case NOP:
                        emit(nNop());
                        break;
                    case BAD_OP:
                        emit(nThrow(nInvokeNew(new Value[] { nString("bad dex opcode") }, new String[] { "Ljava/lang/String;" }, "Ljava/lang/VerifyError;")));
                        break;
                    default:
                        tmp.execute(p, interpreter);
                        break;
                }
            }
        } catch (Exception exception) {
            throw new RuntimeException("Fail on Op " + p.op + " index " + index, exception);
        }
        if (p.op != null) {
            Op op = p.op;
            if (op.canBranch()) {
                JumpStmtNode jump = (JumpStmtNode) p;
                int targetIndex = indexOf(jump.label);
                stack.push(insnList.get(targetIndex));
                merge(tmp, targetIndex);
            }
            if (op.canSwitch()) {
                BaseSwitchStmtNode switchStmtNode = (BaseSwitchStmtNode) p;
                for (DexLabel label : switchStmtNode.labels) {
                    int targetIndex = indexOf(label);
                    stack.push(insnList.get(targetIndex));
                    merge(tmp, targetIndex);
                }
            }
            if (op.canContinue()) {
                stack.push(insnList.get(index + 1));
                merge(tmp, index + 1);
            }
        } else {
            stack.push(insnList.get(index + 1));
            merge(tmp, index + 1);
        }
        // cleanup frame it is useless
        if (parentCount[index] <= 1) {
            frames[index] = null;
        }
    }
}