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GenericMetadata.cpp
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#include "il2cpp-config.h"
#include "il2cpp-runtime-stats.h"
#include "os/Mutex.h"
#include "vm/Class.h"
#include "vm/GenericClass.h"
#include "vm/Image.h"
#include "vm/Type.h"
#include "metadata/GenericMetadata.h"
#include "metadata/GenericMethod.h"
#include "metadata/Il2CppGenericClassHash.h"
#include "metadata/Il2CppGenericClassCompare.h"
#include "metadata/Il2CppGenericInstCompare.h"
#include "metadata/Il2CppGenericInstHash.h"
#include "metadata/Il2CppTypeCompare.h"
#include "metadata/Il2CppTypeHash.h"
#include "utils/Memory.h"
#include "utils/Il2CppHashMap.h"
#include "utils/Il2CppHashSet.h"
#include "utils/StringUtils.h"
#include "vm/MetadataAlloc.h"
#include "vm/MetadataCache.h"
#include "il2cpp-class-internals.h"
#include "il2cpp-tabledefs.h"
#include <vector>
#include "Baselib.h"
#include "Cpp/ReentrantLock.h"
//==={{ huatuo
#include "huatuo/metadata/MetadataUtil.h"
//===}} huatuo
using namespace il2cpp::vm;
using il2cpp::metadata::GenericMethod;
using il2cpp::os::FastAutoLock;
using il2cpp::utils::StringUtils;
using std::vector;
using std::pair;
namespace il2cpp
{
namespace metadata
{
ParameterInfo* GenericMetadata::InflateParameters(const ParameterInfo* parameters, uint8_t parameterCount, const Il2CppGenericContext* context, bool inflateMethodVars)
{
ParameterInfo* inflatedParameters = (ParameterInfo*)MetadataCalloc(parameterCount, sizeof(ParameterInfo));
for (uint8_t j = 0; j < parameterCount; j++)
{
const ParameterInfo* param = parameters + j;
ParameterInfo* param2 = inflatedParameters + j;
param2->name = param->name;
param2->position = param->position;
param2->parameter_type = InflateIfNeeded(param->parameter_type, context, inflateMethodVars);
param2->token = param->token;
}
return inflatedParameters;
}
static const Il2CppType* InflateGenericParameterIfNeeded(const Il2CppType* type, const Il2CppGenericInst* inst)
{
IL2CPP_ASSERT(inst);
Il2CppGenericParameterInfo gp = Type::GetGenericParameterInfo(type);
IL2CPP_ASSERT(gp.num < inst->type_argc);
const Il2CppType* genericArgument = inst->type_argv[gp.num];
if (genericArgument->attrs == type->attrs && genericArgument->byref == type->byref)
return genericArgument;
Il2CppType* inflatedType = (Il2CppType*)MetadataMalloc(sizeof(Il2CppType));
memcpy(inflatedType, genericArgument, sizeof(Il2CppType));
inflatedType->byref = type->byref;
inflatedType->attrs = type->attrs;
++il2cpp_runtime_stats.inflated_type_count;
return inflatedType;
}
const Il2CppType* GenericMetadata::InflateIfNeeded(const Il2CppType* type, const Il2CppGenericContext* context, bool inflateMethodVars)
{
switch (type->type)
{
case IL2CPP_TYPE_VAR:
return InflateGenericParameterIfNeeded(type, context->class_inst);
case IL2CPP_TYPE_MVAR:
{
if (context->method_inst)
return InflateGenericParameterIfNeeded(type, context->method_inst);
return type;
}
case IL2CPP_TYPE_ARRAY:
{
const Il2CppType* inflatedElementType = InflateIfNeeded(type->data.array->etype, context, inflateMethodVars);
if (!Il2CppTypeEqualityComparer::AreEqual(inflatedElementType, type->data.array->etype))
{
Il2CppType* inflatedType = (Il2CppType*)MetadataMalloc(sizeof(Il2CppType));
memcpy(inflatedType, type, sizeof(Il2CppType));
Il2CppArrayType* arrayType = (Il2CppArrayType*)MetadataMalloc(sizeof(Il2CppArrayType));
memcpy(arrayType, type->data.array, sizeof(Il2CppArrayType));
arrayType->etype = inflatedElementType;
inflatedType->data.array = arrayType;
++il2cpp_runtime_stats.inflated_type_count;
return inflatedType;
}
return type;
}
case IL2CPP_TYPE_PTR:
case IL2CPP_TYPE_SZARRAY:
{
const Il2CppType* inflatedElementType = InflateIfNeeded(type->data.type, context, inflateMethodVars);
if (!Il2CppTypeEqualityComparer::AreEqual(inflatedElementType, type->data.type))
{
Il2CppType* arrayType = (Il2CppType*)MetadataMalloc(sizeof(Il2CppType));
memcpy(arrayType, type, sizeof(Il2CppType));
arrayType->data.type = inflatedElementType;
++il2cpp_runtime_stats.inflated_type_count;
return arrayType;
}
return type;
}
case IL2CPP_TYPE_GENERICINST:
{
const Il2CppGenericInst* inst = type->data.generic_class->context.class_inst;
Il2CppTypeVector types;
for (uint32_t i = 0; i < inst->type_argc; i++)
types.push_back(InflateIfNeeded(inst->type_argv[i], context, inflateMethodVars));
const Il2CppGenericInst* inflatedInst = MetadataCache::GetGenericInst(types);
Il2CppGenericClass* genericClass = GenericMetadata::GetGenericClass(GenericClass::GetTypeDefinition(type->data.generic_class), inflatedInst);
if (genericClass != type->data.generic_class)
{
Il2CppType* genericType = (Il2CppType*)MetadataMalloc(sizeof(Il2CppType));
memcpy(genericType, type, sizeof(Il2CppType));
genericType->data.generic_class = genericClass;
++il2cpp_runtime_stats.inflated_type_count;
return genericType;
}
return type;
}
default:
return type;
}
}
static baselib::ReentrantLock s_GenericClassMutex;
typedef Il2CppHashSet<Il2CppGenericClass*, Il2CppGenericClassHash, Il2CppGenericClassCompare> Il2CppGenericClassSet;
static Il2CppGenericClassSet s_GenericClassSet;
Il2CppGenericClass* GenericMetadata::GetGenericClass(const Il2CppClass* containerClass, const Il2CppGenericInst* inst)
{
return GetGenericClass(&containerClass->byval_arg, inst);
}
Il2CppGenericClass* GenericMetadata::GetGenericClass(const Il2CppType* elementType, const Il2CppGenericInst* inst)
{
// temporary inst to lookup a permanent one that may already exist
Il2CppGenericClass genericClass = { 0 };
genericClass.type = elementType;
genericClass.context.class_inst = inst;
FastAutoLock lock(&s_GenericClassMutex);
Il2CppGenericClassSet::const_iterator iter = s_GenericClassSet.find(&genericClass);
if (iter != s_GenericClassSet.end())
return *iter;
Il2CppGenericClass* newClass = MetadataAllocGenericClass();
newClass->type = elementType;
newClass->context.class_inst = inst;
s_GenericClassSet.insert(newClass);
++il2cpp_runtime_stats.generic_class_count;
return newClass;
}
const MethodInfo* GenericMetadata::Inflate(const MethodInfo* methodDefinition, const Il2CppGenericContext* context)
{
const Il2CppGenericMethod* gmethod = MetadataCache::GetGenericMethod(methodDefinition, context->class_inst, context->method_inst);
return GenericMethod::GetMethod(gmethod);
}
static int RecursiveGenericDepthFor(const Il2CppGenericInst* inst);
static int RecursiveGenericDepthFor(Il2CppGenericClass* genericClass)
{
int classInstDepth = RecursiveGenericDepthFor(genericClass->context.class_inst);
int methodInstDepth = RecursiveGenericDepthFor(genericClass->context.method_inst);
return std::max(classInstDepth, methodInstDepth);
}
static int RecursiveGenericDepthFor(const Il2CppGenericInst* inst)
{
if (inst == NULL)
return 0;
int maximumDepth = 0;
for (size_t i = 0; i < inst->type_argc; i++)
{
if (inst->type_argv[i]->type == IL2CPP_TYPE_GENERICINST)
{
maximumDepth = std::max(maximumDepth, RecursiveGenericDepthFor(inst->type_argv[i]->data.generic_class));
}
}
return maximumDepth + 1;
}
const Il2CppGenericMethod* GenericMetadata::Inflate(const Il2CppGenericMethod* genericMethod, const Il2CppGenericContext* context)
{
const Il2CppGenericInst* classInst = genericMethod->context.class_inst;
const Il2CppGenericInst* methodInst = genericMethod->context.method_inst;
if (classInst)
{
Il2CppTypeVector classTypes;
for (size_t i = 0; i < classInst->type_argc; i++)
classTypes.push_back(GenericMetadata::InflateIfNeeded(classInst->type_argv[i], context, true));
classInst = MetadataCache::GetGenericInst(classTypes);
}
if (methodInst)
{
Il2CppTypeVector methodTypes;
for (size_t i = 0; i < methodInst->type_argc; i++)
methodTypes.push_back(GenericMetadata::InflateIfNeeded(methodInst->type_argv[i], context, true));
methodInst = MetadataCache::GetGenericInst(methodTypes);
}
// We have cases where we could infinitely recurse, inflating generics at runtime. This will lead to a stack overflow.
// As we do for code generation, let's cut this off at an arbitrary level. If something tries to execute code at this
// level, a crash will happen. We'll assume that this code won't actually be executed though.
int maximumRuntimeGenericDepth = GetMaximumRuntimeGenericDepth();
if (RecursiveGenericDepthFor(classInst) > maximumRuntimeGenericDepth || RecursiveGenericDepthFor(methodInst) > maximumRuntimeGenericDepth)
return NULL;
return MetadataCache::GetGenericMethod(genericMethod->methodDefinition, classInst, methodInst);
}
Il2CppRGCTXData* GenericMetadata::InflateRGCTX(const Il2CppImage* image, uint32_t token, const Il2CppGenericContext* context)
{
// ==={{ huatuo
if (huatuo::metadata::IsInterpreterImage(image))
{
return nullptr;
}
// ===}} huatuo
RGCTXCollection collection = MetadataCache::GetRGCTXs(image, token);
if (collection.count == 0)
return NULL;
Il2CppRGCTXData* dataValues = (Il2CppRGCTXData*)MetadataCalloc(collection.count, sizeof(Il2CppRGCTXData));
for (RGCTXIndex rgctxIndex = 0; rgctxIndex < collection.count; rgctxIndex++)
{
const Il2CppRGCTXDefinition* definitionData = collection.items + rgctxIndex;
switch (definitionData->type)
{
case IL2CPP_RGCTX_DATA_TYPE:
dataValues[rgctxIndex].type = GenericMetadata::InflateIfNeeded(MetadataCache::GetTypeFromRgctxDefinition(definitionData), context, true);
break;
case IL2CPP_RGCTX_DATA_CLASS:
dataValues[rgctxIndex].klass = Class::FromIl2CppType(GenericMetadata::InflateIfNeeded(MetadataCache::GetTypeFromRgctxDefinition(definitionData), context, true));
break;
case IL2CPP_RGCTX_DATA_METHOD:
dataValues[rgctxIndex].method = GenericMethod::GetMethod(Inflate(MetadataCache::GetGenericMethodFromRgctxDefinition(definitionData), context));
break;
default:
IL2CPP_ASSERT(0);
}
}
return dataValues;
}
// temporary while we generate generics
void GenericMetadata::RegisterGenericClasses(Il2CppGenericClass* const * genericClasses, int32_t genericClassesCount)
{
s_GenericClassSet.resize(genericClassesCount / 2 + 1);
// don't lock, this should only be called from startup and temporarily
for (int32_t i = 0; i < genericClassesCount; i++)
{
if (genericClasses[i]->type != NULL)
s_GenericClassSet.insert(genericClasses[i]);
}
}
void GenericMetadata::WalkAllGenericClasses(GenericClassWalkCallback callback, void* context)
{
FastAutoLock lock(&s_GenericClassMutex);
for (Il2CppGenericClassSet::iterator it = s_GenericClassSet.begin(); it != s_GenericClassSet.end(); it++)
{
if ((*it).key->cached_class != NULL)
callback((*it).key->cached_class, context);
}
}
void GenericMetadata::Clear()
{
for (Il2CppGenericClassSet::iterator genericClass = s_GenericClassSet.begin(); genericClass != s_GenericClassSet.end(); genericClass++)
(*genericClass).key->cached_class = NULL;
s_GenericClassSet.clear();
}
static int s_MaximumRuntimeGenericDepth;
int GenericMetadata::GetMaximumRuntimeGenericDepth()
{
return s_MaximumRuntimeGenericDepth;
}
void GenericMetadata::SetMaximumRuntimeGenericDepth(int depth)
{
s_MaximumRuntimeGenericDepth = depth;
}
} /* namespace vm */
} /* namespace il2cpp */