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Example 6 with InsnNode

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

the class SimplifyVisitor method simplifyInsn.

private static InsnNode simplifyInsn(MethodNode mth, InsnNode insn) {
    for (InsnArg arg : insn.getArguments()) {
        if (arg.isInsnWrap()) {
            InsnNode ni = simplifyInsn(mth, ((InsnWrapArg) arg).getWrapInsn());
            if (ni != null) {
                arg.wrapInstruction(ni);
            }
        }
    }
    switch(insn.getType()) {
        case ARITH:
            return simplifyArith(insn);
        case IF:
            simplifyIf((IfNode) insn);
            break;
        case TERNARY:
            simplifyTernary((TernaryInsn) insn);
            break;
        case INVOKE:
            return convertInvoke(mth, insn);
        case IPUT:
        case SPUT:
            return convertFieldArith(mth, insn);
        case CHECK_CAST:
            return processCast(mth, insn);
        case MOVE:
            InsnArg firstArg = insn.getArg(0);
            if (firstArg.isLiteral()) {
                InsnNode constInsn = new InsnNode(InsnType.CONST, 1);
                constInsn.setResult(insn.getResult());
                constInsn.addArg(firstArg);
                constInsn.copyAttributesFrom(insn);
                return constInsn;
            }
            break;
        default:
            break;
    }
    return null;
}
Also used : IndexInsnNode(jadx.core.dex.instructions.IndexInsnNode) InsnNode(jadx.core.dex.nodes.InsnNode) InsnArg(jadx.core.dex.instructions.args.InsnArg)

Example 7 with InsnNode

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

the class SimplifyVisitor method simplifyArith.

private static InsnNode simplifyArith(InsnNode insn) {
    ArithNode arith = (ArithNode) insn;
    if (arith.getArgsCount() != 2) {
        return null;
    }
    InsnArg litArg = null;
    InsnArg secondArg = arith.getArg(1);
    if (secondArg.isInsnWrap()) {
        InsnNode wr = ((InsnWrapArg) secondArg).getWrapInsn();
        if (wr.getType() == InsnType.CONST) {
            litArg = wr.getArg(0);
        }
    } else if (secondArg.isLiteral()) {
        litArg = secondArg;
    }
    if (litArg != null) {
        long lit = ((LiteralArg) litArg).getLiteral();
        // fix 'c + (-1)' => 'c - (1)'
        if (arith.getOp() == ArithOp.ADD && lit < 0) {
            return new ArithNode(ArithOp.SUB, arith.getResult(), insn.getArg(0), InsnArg.lit(-lit, litArg.getType()));
        }
    }
    return null;
}
Also used : IndexInsnNode(jadx.core.dex.instructions.IndexInsnNode) InsnNode(jadx.core.dex.nodes.InsnNode) InsnArg(jadx.core.dex.instructions.args.InsnArg) LiteralArg(jadx.core.dex.instructions.args.LiteralArg) InsnWrapArg(jadx.core.dex.instructions.args.InsnWrapArg) ArithNode(jadx.core.dex.instructions.ArithNode)

Example 8 with InsnNode

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

the class SimplifyVisitor method convertInvoke.

private static InsnNode convertInvoke(MethodNode mth, InsnNode insn) {
    MethodInfo callMth = ((InvokeNode) insn).getCallMth();
    // convert it to STRING_CONCAT pseudo instruction.
    if (callMth.getDeclClass().getFullName().equals(Consts.CLASS_STRING_BUILDER) && callMth.getShortId().equals(Consts.MTH_TOSTRING_SIGNATURE) && insn.getArg(0).isInsnWrap()) {
        try {
            List<InsnNode> chain = flattenInsnChain(insn);
            //RAF
            int constrIndex = -1;
            // string is created using .append() calls:
            if (chain.size() > 1 && chain.get(0).getType() == InsnType.CONSTRUCTOR) {
                constrIndex = 0;
            } else if (chain.size() > 2 && chain.get(1).getType() == InsnType.CONSTRUCTOR) {
                //RAF Case where the first string element is String arg to the
                // new StringBuilder("xxx") constructor
                constrIndex = 1;
            } else if (chain.size() > 3 && chain.get(2).getType() == InsnType.CONSTRUCTOR) {
                //RAF Case where the first string element is String.valueOf() arg
                // to the new StringBuilder(String.valueOf(zzz)) constructor
                constrIndex = 2;
            }
            if (constrIndex != -1) {
                // If we found a CONSTRUCTOR, is it a StringBuilder?
                ConstructorInsn constr = (ConstructorInsn) chain.get(constrIndex);
                if (constr.getClassType().getFullName().equals(Consts.CLASS_STRING_BUILDER)) {
                    int len = chain.size(), argInd = 1;
                    InsnNode concatInsn = new InsnNode(InsnType.STR_CONCAT, len - 1);
                    InsnNode argInsn;
                    if (constrIndex > 0) {
                        // There was an arg to the StringBuilder constr
                        InsnWrapArg iwa;
                        if (constrIndex == 2 && (argInsn = chain.get(1)).getType() == InsnType.INVOKE && ((InvokeNode) argInsn).getCallMth().getName().compareTo("valueOf") == 0) {
                            // The argument of new StringBuilder() is a String.valueOf(chainElement0)
                            iwa = (InsnWrapArg) argInsn.getArg(0);
                            // Cause for loop below to skip to after the constructor
                            argInd = 3;
                        } else {
                            InsnNode firstNode = chain.get(0);
                            if (firstNode instanceof ConstStringNode) {
                                ConstStringNode csn = (ConstStringNode) firstNode;
                                iwa = new InsnWrapArg(csn);
                                // Cause for loop below to skip to after the constructor
                                argInd = 2;
                            } else {
                                return null;
                            }
                        }
                        concatInsn.addArg(iwa);
                    }
                    for (; argInd < len; argInd++) {
                        // Add the .append(xxx) arg string to concat
                        concatInsn.addArg(chain.get(argInd).getArg(1));
                    }
                    concatInsn.setResult(insn.getResult());
                    return concatInsn;
                }
            // end of if constructor is for StringBuilder
            }
        // end of if we found a constructor early in the chain
        } catch (Throwable e) {
            LOG.debug("Can't convert string concatenation: {} insn: {}", mth, insn, e);
        }
    }
    return null;
}
Also used : IndexInsnNode(jadx.core.dex.instructions.IndexInsnNode) InsnNode(jadx.core.dex.nodes.InsnNode) InvokeNode(jadx.core.dex.instructions.InvokeNode) ConstStringNode(jadx.core.dex.instructions.ConstStringNode) MethodInfo(jadx.core.dex.info.MethodInfo) InsnWrapArg(jadx.core.dex.instructions.args.InsnWrapArg) ConstructorInsn(jadx.core.dex.instructions.mods.ConstructorInsn)

Example 9 with InsnNode

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

the class BlockExceptionHandler method markExceptionHandlers.

/**
	 * Set exception handler attribute for whole block
	 */
private static void markExceptionHandlers(BlockNode block) {
    if (block.getInstructions().isEmpty()) {
        return;
    }
    InsnNode me = block.getInstructions().get(0);
    ExcHandlerAttr handlerAttr = me.get(AType.EXC_HANDLER);
    if (handlerAttr == null || me.getType() != InsnType.MOVE_EXCEPTION) {
        return;
    }
    ExceptionHandler excHandler = handlerAttr.getHandler();
    block.addAttr(handlerAttr);
    // set correct type for 'move-exception' operation
    ArgType type = excHandler.isCatchAll() ? ArgType.THROWABLE : excHandler.getCatchType().getType();
    RegisterArg resArg = me.getResult();
    resArg = InsnArg.reg(resArg.getRegNum(), type);
    me.setResult(resArg);
    me.add(AFlag.DONT_INLINE);
    excHandler.setArg(resArg);
}
Also used : ExceptionHandler(jadx.core.dex.trycatch.ExceptionHandler) ArgType(jadx.core.dex.instructions.args.ArgType) InsnNode(jadx.core.dex.nodes.InsnNode) RegisterArg(jadx.core.dex.instructions.args.RegisterArg) ExcHandlerAttr(jadx.core.dex.trycatch.ExcHandlerAttr)

Example 10 with InsnNode

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

the class ExtractFieldInit method addFieldInitAttr.

private static void addFieldInitAttr(MethodNode classInitMth, FieldNode field, InsnNode insn) {
    InsnNode assignInsn = InsnNode.wrapArg(insn.getArg(0));
    field.addAttr(FieldInitAttr.insnValue(classInitMth, assignInsn));
}
Also used : IndexInsnNode(jadx.core.dex.instructions.IndexInsnNode) InsnNode(jadx.core.dex.nodes.InsnNode)

Aggregations

InsnNode (jadx.core.dex.nodes.InsnNode)123 BlockNode (jadx.core.dex.nodes.BlockNode)41 RegisterArg (jadx.core.dex.instructions.args.RegisterArg)39 IndexInsnNode (jadx.core.dex.instructions.IndexInsnNode)35 InsnArg (jadx.core.dex.instructions.args.InsnArg)32 InsnWrapArg (jadx.core.dex.instructions.args.InsnWrapArg)19 SSAVar (jadx.core.dex.instructions.args.SSAVar)16 ArrayList (java.util.ArrayList)14 ArgType (jadx.core.dex.instructions.args.ArgType)11 PhiInsn (jadx.core.dex.instructions.PhiInsn)10 FieldNode (jadx.core.dex.nodes.FieldNode)10 JadxRuntimeException (jadx.core.utils.exceptions.JadxRuntimeException)8 LiteralArg (jadx.core.dex.instructions.args.LiteralArg)7 ClassNode (jadx.core.dex.nodes.ClassNode)7 MethodNode (jadx.core.dex.nodes.MethodNode)7 FieldInfo (jadx.core.dex.info.FieldInfo)6 ArithNode (jadx.core.dex.instructions.ArithNode)6 ConstructorInsn (jadx.core.dex.instructions.mods.ConstructorInsn)6 InsnType (jadx.core.dex.instructions.InsnType)5 IContainer (jadx.core.dex.nodes.IContainer)5