Examples with DexCodeNode com.googlecode.d2j.node.DexCodeNode used on opensource projects

Example 1 with DexCodeNode

use of com.googlecode.d2j.node.DexCodeNode in project dex2jar by pxb1988.

the class DexWeaver method wrap.

public DexClassVisitor wrap(final String classNameDesc, final DexClassVisitor dcv) {
    return dcv == null ? null : new DexClassVisitor(dcv) {

        Map<MtdInfo, Method> cache = new HashMap<>();

        @Override
        public DexMethodVisitor visitMethod(final int accessFlags, Method method) {
            final DexMethodVisitor dmv = superVisitDexMethod(accessFlags, method);
            final MtdInfo mapTo = findDefinedTargetMethod(method.getOwner(), method.getName(), method.getDesc());
            if (mapTo != null) {
                final Method t = new Method(method.getOwner(), buildMethodAName(method.getName()), method.getParameterTypes(), method.getReturnType());
                final Method src = method;
                return new DexMethodNode(accessFlags, method) {

                    @Override
                    public void visitEnd() {
                        super.visitEnd();
                        DexCodeNode code = this.codeNode;
                        this.codeNode = null;
                        accept(dmv);
                        Op opcode;
                        if (Modifier.isStatic(access)) {
                            opcode = Op.INVOKE_STATIC_RANGE;
                        } else {
                            opcode = Op.INVOKE_VIRTUAL_RANGE;
                        }
                        generateMtdACode(opcode, t, mapTo, dmv, src);
                        // make sure public
                        int newAccess = (access & ~(DexConstants.ACC_PRIVATE | DexConstants.ACC_PROTECTED)) | DexConstants.ACC_PUBLIC;
                        code.accept(wrap(superVisitDexMethod(newAccess, t), dcv));
                    }
                };
            } else {
                return wrap(dmv, dcv);
            }
        }

        private DexMethodVisitor wrap(DexMethodVisitor dmv, final DexClassVisitor classVisitor) {
            return dmv == null ? null : new DexMethodVisitor(dmv) {

                @Override
                public DexCodeVisitor visitCode() {
                    return wrap(super.visitCode(), classVisitor);
                }
            };
        }

        private DexCodeVisitor wrap(DexCodeVisitor dcv, final DexClassVisitor classVisitor) {
            return dcv == null ? null : new DexCodeVisitor(dcv) {

                @Override
                public void visitMethodStmt(Op op, int[] args, Method method) {
                    MtdInfo mapTo = findTargetMethod(method.getOwner(), method.getName(), method.getDesc());
                    if (mapTo != null) {
                        Method methodA = cache.get(buildKey(method.getOwner(), method.getName(), method.getDesc()));
                        if (methodA == null) {
                            if (isStatic(op)) {
                                methodA = new Method(classNameDesc, buildMethodAName(method.getName()), method.getParameterTypes(), method.getReturnType());
                            } else {
                                methodA = new Method(classNameDesc, buildMethodAName(method.getName()), join(method.getOwner(), method.getParameterTypes()), method.getReturnType());
                            }
                            DexMethodVisitor dmv = classVisitor.visitMethod(DexConstants.ACC_PRIVATE | DexConstants.ACC_STATIC, methodA);
                            generateMtdACode(op, method, mapTo, dmv, method);
                            dmv.visitEnd();
                            cache.put(buildKey(method.getOwner(), method.getName(), method.getDesc()), methodA);
                        }
                        super.visitMethodStmt(isRange(op) ? Op.INVOKE_STATIC_RANGE : Op.INVOKE_STATIC, args, methodA);
                    } else {
                        super.visitMethodStmt(op, args, method);
                    }
                }
            };
        }

        private void generateMtdACode(Op opcode, Method t, MtdInfo mapTo, DexMethodVisitor dmv, Method src) {
            DexCodeVisitor dcv = dmv.visitCode();
            int countArge = countArgs(t);
            boolean haveThis = haveThis(opcode);
            int registers = 4 + (haveThis ? 1 : 0) + countArge;
            dcv.visitRegister(registers);
            int argStart = 4;
            if (haveThis) {
                dcv.visitStmt2R(Op.MOVE_OBJECT, 0, argStart);
                argStart++;
            } else {
                dcv.visitConstStmt(Op.CONST_4, 0, 0);
            }
            if (t.getParameterTypes().length == 0) {
                dcv.visitConstStmt(Op.CONST_4, 1, 0);
            } else {
                dcv.visitConstStmt(Op.CONST, 1, t.getParameterTypes().length);
                dcv.visitTypeStmt(Op.NEW_ARRAY, 1, 1, "[Ljava/lang/Object;");
                for (int i = 0; i < t.getParameterTypes().length; i++) {
                    char type = t.getParameterTypes()[i].charAt(0);
                    dcv.visitConstStmt(Op.CONST, 2, i);
                    box(type, argStart, 3, dcv);
                    dcv.visitStmt3R(Op.APUT_OBJECT, 3, 1, 2);
                    if (type == 'J' || type == 'D') {
                        argStart += 2;
                    } else {
                        argStart += 1;
                    }
                }
            }
            int nextIdx = callbacks.size();
            dcv.visitConstStmt(Op.CONST, 2, nextIdx);
            String miTypeDesc = "L" + getCurrentInvocationName() + ";";
            dcv.visitTypeStmt(Op.NEW_INSTANCE, 3, 0, miTypeDesc);
            dcv.visitMethodStmt(Op.INVOKE_DIRECT, new int[] { 3, 0, 1, 2 }, new Method(miTypeDesc, "<init>", new String[] { "Ljava/lang/Object;", "[Ljava/lang/Object;", "I" }, "V"));
            Method call = build(mapTo);
            dcv.visitMethodStmt(Op.INVOKE_STATIC, new int[] { 3 }, call);
            if (!"V".equals(t.getReturnType())) {
                switch(call.getReturnType().charAt(0)) {
                    case '[':
                    case 'L':
                        dcv.visitStmt1R(Op.MOVE_RESULT_OBJECT, 0);
                        break;
                    case 'J':
                    case 'D':
                        dcv.visitStmt1R(Op.MOVE_RESULT_WIDE, 0);
                        break;
                    default:
                        dcv.visitStmt1R(Op.MOVE_RESULT, 0);
                        break;
                }
                unbox(t.getReturnType(), 0, dcv);
                switch(t.getReturnType().charAt(0)) {
                    case '[':
                    case 'L':
                        dcv.visitStmt1R(Op.RETURN_OBJECT, 0);
                        break;
                    case 'J':
                    case 'D':
                        dcv.visitStmt1R(Op.RETURN_WIDE, 0);
                        break;
                    default:
                        dcv.visitStmt1R(Op.RETURN, 0);
                        break;
                }
            } else {
                dcv.visitStmt0R(Op.RETURN_VOID);
            }
            Callback cb = new Callback();
            cb.idx = nextIdx;
            cb.callback = newMethodCallback(opcode, t);
            cb.target = src;
            cb.isSpecial = isSuper(opcode);
            cb.isStatic = isStatic(opcode);
            callbacks.add(cb);
        }

        private Method newMethodCallback(Op opcode, Method t) {
            boolean isStatic = !haveThis(opcode);
            boolean isSuper = isSuper(opcode);
            Method m;
            if (isSuper || isStatic) {
                m = new Method(t.getOwner(), buildCallbackMethodName(t.getName()), new String[] { "[Ljava/lang/Object;" }, "Ljava/lang/Object;");
            } else {
                m = new Method(t.getOwner(), buildCallbackMethodName(t.getName()), new String[] { "Ljava/lang/Object;", "[Ljava/lang/Object;" }, "Ljava/lang/Object;");
            }
            DexMethodVisitor dmv = superVisitDexMethod(DexConstants.ACC_PUBLIC | (isSuper ? 0 : DexConstants.ACC_STATIC), m);
            DexCodeVisitor dcv = dmv.visitCode();
            int totalRegs;
            int argStart;
            if (isStatic) {
                totalRegs = 1 + countArgs(t) + 1;
                argStart = totalRegs - 1;
            } else {
                totalRegs = 1 + countArgs(t) + 2;
                argStart = totalRegs - 2;
            }
            dcv.visitRegister(totalRegs);
            int[] args = new int[countArgs(t) + (isStatic ? 0 : 1)];
            int args_index = 0;
            int i = 1;
            if (!isStatic) {
                if (i != argStart) {
                    dcv.visitStmt2R(Op.MOVE_OBJECT, i, argStart);
                }
                if (!isSuper) {
                    dcv.visitTypeStmt(Op.CHECK_CAST, i, -1, t.getOwner());
                }
                args[args_index++] = i;
                i++;
                argStart++;
            }
            String[] parameterTypes = t.getParameterTypes();
            for (int i1 = 0; i1 < parameterTypes.length; i1++) {
                String argType = parameterTypes[i1];
                dcv.visitConstStmt(Op.CONST, 0, i1);
                dcv.visitStmt3R(Op.AGET_OBJECT, i, argStart, 0);
                unbox(argType, i, dcv);
                args[args_index++] = i;
                if (argType.charAt(0) == 'J' || argType.charAt(0) == 'D') {
                    args[args_index++] = i + 1;
                    i += 2;
                } else {
                    i += 1;
                }
            }
            dcv.visitMethodStmt(opcode, args, t);
            if ("V".equals(t.getReturnType())) {
                dcv.visitConstStmt(Op.CONST, 0, 0);
            } else {
                switch(t.getReturnType().charAt(0)) {
                    case '[':
                    case 'L':
                        dcv.visitStmt1R(Op.MOVE_RESULT_OBJECT, 0);
                        break;
                    case 'J':
                    case 'D':
                        dcv.visitStmt1R(Op.MOVE_RESULT_WIDE, 0);
                        break;
                    default:
                        dcv.visitStmt1R(Op.MOVE_RESULT, 0);
                        break;
                }
                box(t.getReturnType().charAt(0), 0, 0, dcv);
            }
            dcv.visitStmt1R(Op.RETURN_OBJECT, 0);
            return m;
        }

        private DexMethodVisitor superVisitDexMethod(int accessFlags, Method method) {
            return super.visitMethod(accessFlags, method);
        }
    };
}