Examples with InsnNode jadx.core.dex.nodes.InsnNode used on opensource projects

Example 51 with InsnNode

use of jadx.core.dex.nodes.InsnNode in project jadx by skylot.

the class ReSugarCode method processNewArray.

/**
	 * Replace new array and sequence of array-put to new filled-array instruction.
	 */
private static InsnNode processNewArray(MethodNode mth, List<InsnNode> instructions, int i, InstructionRemover remover) {
    NewArrayNode newArrayInsn = (NewArrayNode) instructions.get(i);
    InsnArg arg = newArrayInsn.getArg(0);
    if (!arg.isLiteral()) {
        return null;
    }
    int len = (int) ((LiteralArg) arg).getLiteral();
    int size = instructions.size();
    if (len <= 0 || i + len >= size || instructions.get(i + len).getType() != InsnType.APUT) {
        return null;
    }
    ArgType arrType = newArrayInsn.getArrayType();
    InsnNode filledArr = new FilledNewArrayNode(arrType.getArrayElement(), len);
    filledArr.setResult(newArrayInsn.getResult());
    for (int j = 0; j < len; j++) {
        InsnNode put = instructions.get(i + 1 + j);
        if (put.getType() != InsnType.APUT) {
            LOG.debug("Not a APUT in expected new filled array: {}, method: {}", put, mth);
            return null;
        }
        filledArr.addArg(put.getArg(2));
        remover.add(put);
    }
    return filledArr;
}

Example 52 with InsnNode

use of jadx.core.dex.nodes.InsnNode in project jadx by skylot.

the class BlockProcessor method splitReturn.

/**
	 * Splice return block if several predecessors presents
	 */
private static boolean splitReturn(MethodNode mth) {
    if (mth.getExitBlocks().size() != 1) {
        return false;
    }
    BlockNode exitBlock = mth.getExitBlocks().get(0);
    if (exitBlock.getInstructions().size() != 1 || exitBlock.contains(AFlag.SYNTHETIC)) {
        return false;
    }
    List<BlockNode> preds = exitBlock.getPredecessors();
    if (preds.size() < 2) {
        return false;
    }
    preds = BlockUtils.filterPredecessors(exitBlock);
    if (preds.size() < 2) {
        return false;
    }
    InsnNode returnInsn = exitBlock.getInstructions().get(0);
    if (returnInsn.getArgsCount() != 0 && !isReturnArgAssignInPred(preds, returnInsn)) {
        return false;
    }
    boolean first = true;
    for (BlockNode pred : preds) {
        BlockNode newRetBlock = BlockSplitter.startNewBlock(mth, exitBlock.getStartOffset());
        newRetBlock.add(AFlag.SYNTHETIC);
        InsnNode newRetInsn;
        if (first) {
            newRetInsn = returnInsn;
            newRetBlock.add(AFlag.ORIG_RETURN);
            first = false;
        } else {
            newRetInsn = duplicateReturnInsn(returnInsn);
        }
        newRetBlock.getInstructions().add(newRetInsn);
        removeConnection(pred, exitBlock);
        connect(pred, newRetBlock);
    }
    cleanExitNodes(mth);
    return true;
}

Example 53 with InsnNode

use of jadx.core.dex.nodes.InsnNode in project jadx by skylot.

the class BlockProcessor method duplicateReturnInsn.

private static InsnNode duplicateReturnInsn(InsnNode returnInsn) {
    InsnNode insn = new InsnNode(returnInsn.getType(), returnInsn.getArgsCount());
    if (returnInsn.getArgsCount() == 1) {
        RegisterArg arg = (RegisterArg) returnInsn.getArg(0);
        insn.addArg(InsnArg.reg(arg.getRegNum(), arg.getType()));
    }
    insn.copyAttributesFrom(returnInsn);
    insn.setOffset(returnInsn.getOffset());
    insn.setSourceLine(returnInsn.getSourceLine());
    return insn;
}

Example 54 with InsnNode

use of jadx.core.dex.nodes.InsnNode in project jadx by skylot.

the class BlockProcessor method isReturnArgAssignInPred.

private static boolean isReturnArgAssignInPred(List<BlockNode> preds, InsnNode returnInsn) {
    RegisterArg arg = (RegisterArg) returnInsn.getArg(0);
    int regNum = arg.getRegNum();
    for (BlockNode pred : preds) {
        for (InsnNode insnNode : pred.getInstructions()) {
            RegisterArg result = insnNode.getResult();
            if (result != null && result.getRegNum() == regNum) {
                return true;
            }
        }
    }
    return false;
}

Example 55 with InsnNode

use of jadx.core.dex.nodes.InsnNode in project jadx by skylot.

the class BlockSplitter method setupConnections.

private static void setupConnections(MethodNode mth, Map<Integer, BlockNode> blocksMap) {
    for (BlockNode block : mth.getBasicBlocks()) {
        for (InsnNode insn : block.getInstructions()) {
            List<JumpInfo> jumps = insn.getAll(AType.JUMP);
            for (JumpInfo jump : jumps) {
                BlockNode srcBlock = getBlock(jump.getSrc(), blocksMap);
                BlockNode thisBlock = getBlock(jump.getDest(), blocksMap);
                connect(srcBlock, thisBlock);
            }
            connectExceptionHandlers(blocksMap, block, insn);
        }
    }
}