0312 加密处理

hch

2024-04-11 4c71d74b77c9eb62a0323698c9a0db3b641a917e

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#include "ConsistentAOTHomologousImage.h"
 
#include "vm/MetadataLock.h"
#include "vm/GlobalMetadata.h"
#include "vm/Class.h"
#include "vm/Image.h"
#include "vm/Exception.h"
#include "vm/MetadataCache.h"
#include "metadata/GenericMetadata.h"
 
namespace hybridclr
{
namespace metadata
{
 
    void ConsistentAOTHomologousImage::InitRuntimeMetadatas()
    {
        InitTypes();
        InitMethods();
        InitFields();
    }
 
    void ConsistentAOTHomologousImage::InitTypes()
    {
        const Table& typeDefTb = _rawImage.GetTable(TableType::TYPEDEF);
        uint32_t typeCount = typeDefTb.rowNum;
        _il2cppTypeForTypeDefs.resize(typeCount);
        _typeDefs.resize(typeCount);
 
        Il2CppImage* image = _aotAssembly->image;
        //if (image->typeCount != typeCount)
        //{
        //    RaiseExecutionEngineException("image metadata not match");
        //}
        for (uint32_t index = 0; index < image->typeCount; index++)
        {
            Il2CppTypeDefinition* typeDef = (Il2CppTypeDefinition*)il2cpp::vm::MetadataCache::GetAssemblyTypeHandle(image, index);
            uint32_t rowIndex = DecodeTokenRowIndex(typeDef->token);
            IL2CPP_ASSERT(rowIndex > 0);
            if (rowIndex > typeCount)
            {
                continue;
            }
            TbTypeDef data = _rawImage.ReadTypeDef(rowIndex);
            uint32_t typeIndex = rowIndex - 1;
            _typeDefs[typeIndex] = typeDef;
            const Il2CppType* il2cppType = il2cpp::vm::GlobalMetadata::GetIl2CppTypeFromIndex(typeDef->byvalTypeIndex);
            _il2cppTypeForTypeDefs[typeIndex] = il2cppType;
 
            const char* name1 = _rawImage.GetStringFromRawIndex(data.typeName);
            const char* name2 = il2cpp::vm::GlobalMetadata::GetStringFromIndex(typeDef->nameIndex);
            if (std::strcmp(name1, name2))
            {
                RaiseExecutionEngineException("metadata type not match");
            }
            const char* namespaze1 = _rawImage.GetStringFromRawIndex(data.typeNamespace);
            const char* namespaze2 = il2cpp::vm::GlobalMetadata::GetStringFromIndex(typeDef->namespaceIndex);
            if (std::strcmp(namespaze1, namespaze2))
            {
                RaiseExecutionEngineException("metadata type not match");
            }
        }
    }
 
    void ConsistentAOTHomologousImage::InitMethods()
    {
        const Table& methodTb = _rawImage.GetTable(TableType::METHOD);
        _methodDefs.resize(methodTb.rowNum);
 
        for (Il2CppTypeDefinition* type : _typeDefs)
        {
            for (uint16_t i = 0; i < type->method_count; i++)
            {
                const Il2CppMethodDefinition* methodDef = il2cpp::vm::GlobalMetadata::GetMethodDefinitionFromIndex(type->methodStart + i);
                uint32_t rowIndex = DecodeTokenRowIndex(methodDef->token);
                IL2CPP_ASSERT(rowIndex > 0 && rowIndex <= methodTb.rowNum);
                uint32_t methodIndex = rowIndex - 1;
                IL2CPP_ASSERT(_methodDefs[methodIndex] == nullptr);
                _methodDefs[methodIndex] = methodDef;
 
                TbMethod methodData = _rawImage.ReadMethod(rowIndex);
                const char* name1 = _rawImage.GetStringFromRawIndex(methodData.name);
                const char* name2 = il2cpp::vm::GlobalMetadata::GetStringFromIndex(methodDef->nameIndex);
                if (std::strcmp(name1, name2))
                {
                    RaiseExecutionEngineException("metadata method not match");
                }
            }
        }
    }
 
    void ConsistentAOTHomologousImage::InitFields()
    {
        const Table& fieldTb = _rawImage.GetTable(TableType::FIELD);
        _fields.resize(fieldTb.rowNum);
 
        for (size_t i = 0; i < _typeDefs.size(); i++)
        {
            Il2CppTypeDefinition* type = _typeDefs[i];
            for (uint16_t j = 0; j < type->field_count; j++)
            {
                const Il2CppFieldDefinition* fieldDef = il2cpp::vm::GlobalMetadata::GetFieldDefinitionFromTypeDefAndFieldIndex(type, j);
                uint32_t rowIndex = DecodeTokenRowIndex(fieldDef->token);
                IL2CPP_ASSERT(rowIndex > 0);
                uint32_t fieldIndex = rowIndex - 1;
                IL2CPP_ASSERT(_fields[fieldIndex].fieldDef == nullptr);
                if (rowIndex >= fieldTb.rowNum)
                {
                    continue;
                }
                _fields[fieldIndex] = { (uint32_t)i, fieldDef };
 
                TbField fieldData = _rawImage.ReadField(rowIndex);
                const char* name1 = _rawImage.GetStringFromRawIndex(fieldData.name);
                const char* name2 = il2cpp::vm::GlobalMetadata::GetStringFromIndex(fieldDef->nameIndex);
                if (std::strcmp(name1, name2))
                {
                    RaiseExecutionEngineException("metadata field not match");
                }
            }
        }
    }
 
    MethodBody* ConsistentAOTHomologousImage::GetMethodBody(uint32_t token)
    {
        auto it = _token2MethodBodies.find(token);
        if (it != _token2MethodBodies.end())
        {
            return it->second;
        }
        uint32_t rowIndex = DecodeTokenRowIndex(token);
        IL2CPP_ASSERT(rowIndex > 0);
        TbMethod methodData = _rawImage.ReadMethod(rowIndex);
        MethodBody* body = new (HYBRIDCLR_MALLOC_ZERO(sizeof(MethodBody))) MethodBody();
        ReadMethodBody(*_methodDefs[rowIndex - 1], methodData, *body);
        _token2MethodBodies.insert({ token, body });
        return body;
    }
 
    const Il2CppType* ConsistentAOTHomologousImage::GetIl2CppTypeFromRawTypeDefIndex(uint32_t index)
    {
        IL2CPP_ASSERT((size_t)index < _il2cppTypeForTypeDefs.size());
        return _il2cppTypeForTypeDefs[index];
    }
 
    Il2CppGenericContainer* ConsistentAOTHomologousImage::GetGenericContainerByRawIndex(uint32_t index)
    {
        return (Il2CppGenericContainer*)il2cpp::vm::GlobalMetadata::GetGenericContainerFromIndex(index);
    }
 
    Il2CppGenericContainer* ConsistentAOTHomologousImage::GetGenericContainerByTypeDefRawIndex(int32_t typeDefIndex)
    {
        Il2CppTypeDefinition* type = (Il2CppTypeDefinition*)il2cpp::vm::GlobalMetadata::GetTypeHandleFromIndex(typeDefIndex);
        return (Il2CppGenericContainer*)il2cpp::vm::GlobalMetadata::GetGenericContainerFromIndex(type->genericContainerIndex);
    }
 
    const Il2CppMethodDefinition* ConsistentAOTHomologousImage::GetMethodDefinitionFromRawIndex(uint32_t index)
    {
        IL2CPP_ASSERT((size_t)index < _methodDefs.size());
        return _methodDefs[index];
    }
 
    void ConsistentAOTHomologousImage::ReadFieldRefInfoFromFieldDefToken(uint32_t rowIndex, FieldRefInfo& ret)
    {
        IL2CPP_ASSERT(rowIndex > 0);
        AOTFieldData& fd = _fields[rowIndex - 1];
        ret.containerType = *_il2cppTypeForTypeDefs[fd.typeDefIndex];
        ret.field = fd.fieldDef;
    }
}
}