Examples with ConstClassNode jadx.core.dex.instructions.ConstClassNode used on opensource projects

Example 1 with ConstClassNode

use of jadx.core.dex.instructions.ConstClassNode in project jadx by skylot.

the class ModVisitor method replaceStep.

private static void replaceStep(MethodNode mth, InstructionRemover remover) {
    ClassNode parentClass = mth.getParentClass();
    for (BlockNode block : mth.getBasicBlocks()) {
        remover.setBlock(block);
        int size = block.getInstructions().size();
        for (int i = 0; i < size; i++) {
            InsnNode insn = block.getInstructions().get(i);
            switch(insn.getType()) {
                case INVOKE:
                    processInvoke(mth, block, i, remover);
                    break;
                case CONST:
                case CONST_STR:
                case CONST_CLASS:
                    {
                        FieldNode f;
                        if (insn.getType() == InsnType.CONST_STR) {
                            String s = ((ConstStringNode) insn).getString();
                            f = parentClass.getConstField(s);
                        } else if (insn.getType() == InsnType.CONST_CLASS) {
                            ArgType t = ((ConstClassNode) insn).getClsType();
                            f = parentClass.getConstField(t);
                        } else {
                            f = parentClass.getConstFieldByLiteralArg((LiteralArg) insn.getArg(0));
                        }
                        if (f != null) {
                            InsnNode inode = new IndexInsnNode(InsnType.SGET, f.getFieldInfo(), 0);
                            inode.setResult(insn.getResult());
                            replaceInsn(block, i, inode);
                        }
                        break;
                    }
                case SWITCH:
                    SwitchNode sn = (SwitchNode) insn;
                    for (int k = 0; k < sn.getCasesCount(); k++) {
                        FieldNode f = parentClass.getConstField(sn.getKeys()[k]);
                        if (f != null) {
                            sn.getKeys()[k] = f;
                        }
                    }
                    break;
                case NEW_ARRAY:
                    // create array in 'fill-array' instruction
                    int next = i + 1;
                    if (next < size) {
                        InsnNode ni = block.getInstructions().get(next);
                        if (ni.getType() == InsnType.FILL_ARRAY) {
                            ni.getResult().merge(mth.dex(), insn.getResult());
                            ArgType arrType = ((NewArrayNode) insn).getArrayType();
                            ((FillArrayNode) ni).mergeElementType(mth.dex(), arrType.getArrayElement());
                            remover.add(insn);
                        }
                    }
                    break;
                case FILL_ARRAY:
                    InsnNode filledArr = makeFilledArrayInsn(mth, (FillArrayNode) insn);
                    replaceInsn(block, i, filledArr);
                    break;
                case MOVE_EXCEPTION:
                    processMoveException(mth, block, insn, remover);
                    break;
                case ARITH:
                    ArithNode arithNode = (ArithNode) insn;
                    if (arithNode.getArgsCount() == 2) {
                        InsnArg litArg = arithNode.getArg(1);
                        if (litArg.isLiteral()) {
                            FieldNode f = parentClass.getConstFieldByLiteralArg((LiteralArg) litArg);
                            if (f != null) {
                                InsnNode fGet = new IndexInsnNode(InsnType.SGET, f.getFieldInfo(), 0);
                                insn.replaceArg(litArg, InsnArg.wrapArg(fGet));
                            }
                        }
                    }
                    break;
                default:
                    break;
            }
        }
        remover.perform();
    }
}

Example 2 with ConstClassNode

use of jadx.core.dex.instructions.ConstClassNode in project jadx by skylot.

the class InsnUtils method getConstValueByInsn.

/**
	 * Return constant value from insn or null if not constant.
	 *
	 * @return LiteralArg, String, ArgType or null
	 */
@Nullable
public static Object getConstValueByInsn(DexNode dex, InsnNode insn) {
    switch(insn.getType()) {
        case CONST:
            return insn.getArg(0);
        case CONST_STR:
            return ((ConstStringNode) insn).getString();
        case CONST_CLASS:
            return ((ConstClassNode) insn).getClsType();
        case SGET:
            FieldInfo f = (FieldInfo) ((IndexInsnNode) insn).getIndex();
            FieldNode fieldNode = dex.resolveField(f);
            if (fieldNode != null) {
                FieldInitAttr attr = fieldNode.get(AType.FIELD_INIT);
                if (attr != null) {
                    return attr.getValue();
                }
            } else {
                LOG.warn("Field {} not found in dex {}", f, dex);
            }
            break;
    }
    return null;
}

Example 3 with ConstClassNode

use of jadx.core.dex.instructions.ConstClassNode in project jadx by skylot.

the class InsnGen method makeInsnBody.

private void makeInsnBody(CodeWriter code, InsnNode insn, Set<Flags> state) throws CodegenException {
    switch(insn.getType()) {
        case CONST_STR:
            String str = ((ConstStringNode) insn).getString();
            code.add(mth.dex().root().getStringUtils().unescapeString(str));
            break;
        case CONST_CLASS:
            ArgType clsType = ((ConstClassNode) insn).getClsType();
            useType(code, clsType);
            code.add(".class");
            break;
        case CONST:
            LiteralArg arg = (LiteralArg) insn.getArg(0);
            code.add(lit(arg));
            break;
        case MOVE:
            addArg(code, insn.getArg(0), false);
            break;
        case CHECK_CAST:
        case CAST:
            {
                boolean wrap = state.contains(Flags.BODY_ONLY);
                if (wrap) {
                    code.add('(');
                }
                code.add('(');
                useType(code, (ArgType) ((IndexInsnNode) insn).getIndex());
                code.add(") ");
                addArg(code, insn.getArg(0), true);
                if (wrap) {
                    code.add(')');
                }
                break;
            }
        case ARITH:
            makeArith((ArithNode) insn, code, state);
            break;
        case NEG:
            {
                boolean wrap = state.contains(Flags.BODY_ONLY);
                if (wrap) {
                    code.add('(');
                }
                code.add('-');
                addArg(code, insn.getArg(0));
                if (wrap) {
                    code.add(')');
                }
                break;
            }
        case RETURN:
            if (insn.getArgsCount() != 0) {
                code.add("return ");
                addArg(code, insn.getArg(0), false);
            } else {
                code.add("return");
            }
            break;
        case BREAK:
            code.add("break");
            LoopLabelAttr labelAttr = insn.get(AType.LOOP_LABEL);
            if (labelAttr != null) {
                code.add(' ').add(mgen.getNameGen().getLoopLabel(labelAttr));
            }
            break;
        case CONTINUE:
            code.add("continue");
            break;
        case THROW:
            code.add("throw ");
            addArg(code, insn.getArg(0), true);
            break;
        case CMP_L:
        case CMP_G:
            code.add('(');
            addArg(code, insn.getArg(0));
            code.add(" > ");
            addArg(code, insn.getArg(1));
            code.add(" ? 1 : (");
            addArg(code, insn.getArg(0));
            code.add(" == ");
            addArg(code, insn.getArg(1));
            code.add(" ? 0 : -1))");
            break;
        case INSTANCE_OF:
            {
                boolean wrap = state.contains(Flags.BODY_ONLY);
                if (wrap) {
                    code.add('(');
                }
                addArg(code, insn.getArg(0));
                code.add(" instanceof ");
                useType(code, (ArgType) ((IndexInsnNode) insn).getIndex());
                if (wrap) {
                    code.add(')');
                }
                break;
            }
        case CONSTRUCTOR:
            makeConstructor((ConstructorInsn) insn, code);
            break;
        case INVOKE:
            makeInvoke((InvokeNode) insn, code);
            break;
        case NEW_ARRAY:
            {
                ArgType arrayType = ((NewArrayNode) insn).getArrayType();
                code.add("new ");
                useType(code, arrayType.getArrayRootElement());
                code.add('[');
                addArg(code, insn.getArg(0));
                code.add(']');
                int dim = arrayType.getArrayDimension();
                for (int i = 0; i < dim - 1; i++) {
                    code.add("[]");
                }
                break;
            }
        case ARRAY_LENGTH:
            addArg(code, insn.getArg(0));
            code.add(".length");
            break;
        case FILLED_NEW_ARRAY:
            filledNewArray((FilledNewArrayNode) insn, code);
            break;
        case AGET:
            addArg(code, insn.getArg(0));
            code.add('[');
            addArg(code, insn.getArg(1), false);
            code.add(']');
            break;
        case APUT:
            addArg(code, insn.getArg(0));
            code.add('[');
            addArg(code, insn.getArg(1), false);
            code.add("] = ");
            addArg(code, insn.getArg(2), false);
            break;
        case IGET:
            {
                FieldInfo fieldInfo = (FieldInfo) ((IndexInsnNode) insn).getIndex();
                instanceField(code, fieldInfo, insn.getArg(0));
                break;
            }
        case IPUT:
            {
                FieldInfo fieldInfo = (FieldInfo) ((IndexInsnNode) insn).getIndex();
                instanceField(code, fieldInfo, insn.getArg(1));
                code.add(" = ");
                addArg(code, insn.getArg(0), false);
                break;
            }
        case SGET:
            staticField(code, (FieldInfo) ((IndexInsnNode) insn).getIndex());
            break;
        case SPUT:
            FieldInfo field = (FieldInfo) ((IndexInsnNode) insn).getIndex();
            staticField(code, field);
            code.add(" = ");
            addArg(code, insn.getArg(0), false);
            break;
        case STR_CONCAT:
            boolean wrap = state.contains(Flags.BODY_ONLY);
            if (wrap) {
                code.add('(');
            }
            for (Iterator<InsnArg> it = insn.getArguments().iterator(); it.hasNext(); ) {
                addArg(code, it.next());
                if (it.hasNext()) {
                    code.add(" + ");
                }
            }
            if (wrap) {
                code.add(')');
            }
            break;
        case MONITOR_ENTER:
            if (isFallback()) {
                code.add("monitor-enter(");
                addArg(code, insn.getArg(0));
                code.add(')');
            }
            break;
        case MONITOR_EXIT:
            if (isFallback()) {
                code.add("monitor-exit(");
                addArg(code, insn.getArg(0));
                code.add(')');
            }
            break;
        case TERNARY:
            makeTernary((TernaryInsn) insn, code, state);
            break;
        case ONE_ARG:
            addArg(code, insn.getArg(0));
            break;
        /* fallback mode instructions */
        case IF:
            fallbackOnlyInsn(insn);
            IfNode ifInsn = (IfNode) insn;
            code.add("if (");
            addArg(code, insn.getArg(0));
            code.add(' ');
            code.add(ifInsn.getOp().getSymbol()).add(' ');
            addArg(code, insn.getArg(1));
            code.add(") goto ").add(MethodGen.getLabelName(ifInsn.getTarget()));
            break;
        case GOTO:
            fallbackOnlyInsn(insn);
            code.add("goto ").add(MethodGen.getLabelName(((GotoNode) insn).getTarget()));
            break;
        case MOVE_EXCEPTION:
            fallbackOnlyInsn(insn);
            code.add("move-exception");
            break;
        case SWITCH:
            fallbackOnlyInsn(insn);
            SwitchNode sw = (SwitchNode) insn;
            code.add("switch(");
            addArg(code, insn.getArg(0));
            code.add(") {");
            code.incIndent();
            for (int i = 0; i < sw.getCasesCount(); i++) {
                String key = sw.getKeys()[i].toString();
                code.startLine("case ").add(key).add(": goto ");
                code.add(MethodGen.getLabelName(sw.getTargets()[i])).add(';');
            }
            code.startLine("default: goto ");
            code.add(MethodGen.getLabelName(sw.getDefaultCaseOffset())).add(';');
            code.decIndent();
            code.startLine('}');
            break;
        case FILL_ARRAY:
            fallbackOnlyInsn(insn);
            FillArrayNode arrayNode = (FillArrayNode) insn;
            Object data = arrayNode.getData();
            String arrStr;
            if (data instanceof int[]) {
                arrStr = Arrays.toString((int[]) data);
            } else if (data instanceof short[]) {
                arrStr = Arrays.toString((short[]) data);
            } else if (data instanceof byte[]) {
                arrStr = Arrays.toString((byte[]) data);
            } else if (data instanceof long[]) {
                arrStr = Arrays.toString((long[]) data);
            } else {
                arrStr = "?";
            }
            code.add('{').add(arrStr.substring(1, arrStr.length() - 1)).add('}');
            break;
        case NEW_INSTANCE:
            // only fallback - make new instance in constructor invoke
            fallbackOnlyInsn(insn);
            code.add("new ").add(insn.getResult().getType().toString());
            break;
        case PHI:
        case MERGE:
            fallbackOnlyInsn(insn);
            code.add(insn.getType().toString()).add("(");
            for (InsnArg insnArg : insn.getArguments()) {
                addArg(code, insnArg);
                code.add(' ');
            }
            code.add(")");
            break;
        default:
            throw new CodegenException(mth, "Unknown instruction: " + insn.getType());
    }
}