U32 Type_IsValueType(tMD_TypeDef *pTypeDef) {
// If this type is an interface, then return 0
if (TYPE_ISINTERFACE(pTypeDef)) {
return 0;
}
// If this type is Object or ValueType then return an answer
if (strcmp(pTypeDef->nameSpace, "System") == 0) {
if (strcmp(pTypeDef->name, "ValueType") == 0) {
return 1;
}
if (strcmp(pTypeDef->name, "Object") == 0) {
return 0;
}
}
// Return the isValueType determined by parent type
pTypeDef = MetaData_GetTypeDefFromDefRefOrSpec(pTypeDef->pMetaData, pTypeDef->extends, NULL, NULL);
MetaData_Fill_TypeDef(pTypeDef, NULL, NULL);
return pTypeDef->isValueType;
}
void MetaData_Fill_TypeDef_(tMD_TypeDef *pTypeDef, tMD_TypeDef **ppClassTypeArgs, tMD_TypeDef **ppMethodTypeArgs)
{
IDX_TABLE firstIdx, lastIdx, token;
U32 instanceMemSize, staticMemSize, virtualOfs, i, j;
tMetaData *pMetaData;
tMD_TypeDef *pParent;
pMetaData = pTypeDef->pMetaData;
pTypeDef->isFilled = 1;
pTypeDef->pTypeDef = pTypeDef;
pTypeDef->pParent = MetaData_GetTypeDefFromDefRefOrSpec(pMetaData, pTypeDef->extends, ppClassTypeArgs, ppMethodTypeArgs);
pParent = pTypeDef->pParent;
if (pParent != NULL)
{
MetaData_Fill_TypeDef(pParent, NULL, NULL);
virtualOfs = pParent->numVirtualMethods;
}
else
{
virtualOfs = 0;
}
pTypeDef->isValueType = (U8)Type_IsValueType(pTypeDef);
// If not primed, then work out how many methods & fields there are.
if (!pTypeDef->isPrimed)
{
// Methods
lastIdx = (pTypeDef->isLast)?
MAKE_TABLE_INDEX(MD_TABLE_METHODDEF, pTypeDef->pMetaData->tables.numRows[MD_TABLE_METHODDEF]):
(pTypeDef[1].methodList - 1);
pTypeDef->numMethods = lastIdx - pTypeDef->methodList + 1;
// Fields
lastIdx = (pTypeDef->isLast)?
MAKE_TABLE_INDEX(MD_TABLE_FIELDDEF, pTypeDef->pMetaData->tables.numRows[MD_TABLE_FIELDDEF]):
(pTypeDef[1].fieldList - 1);
pTypeDef->numFields = lastIdx - pTypeDef->fieldList + 1;
}
// Must create the virtual method table BEFORE any other type resolution is done
// Note that this must not do ANY filling of types or methods.
// This is to ensure that the parent object(s) in any type inheritance hierachy are allocated
// their virtual method offset before derived types.
firstIdx = pTypeDef->methodList;
lastIdx = firstIdx + pTypeDef->numMethods - 1;
// This only needs to be done for non-generic types, or for generic types that are not a definition
// I.e. Fully instantiated generic types
if (!pTypeDef->isGenericDefinition)
{
for (token = firstIdx; token <= lastIdx; token++)
{
tMD_MethodDef *pMethodDef;
pMethodDef = MetaData_GetMethodDefFromDefRefOrSpec(pMetaData, token, ppClassTypeArgs, ppMethodTypeArgs);
// This is needed, so array resolution can work correctly and FindVirtualOverriddenMethod() can work.
pMethodDef->pParentType = pTypeDef;
if (METHOD_ISVIRTUAL(pMethodDef))
{
if (METHOD_ISNEWSLOT(pMethodDef) || pTypeDef->pParent == NULL)
{
// Allocate a new vTable slot if method is explicitly marked as NewSlot, or
// this is of type Object.
pMethodDef->vTableOfs = virtualOfs++;
}
else
{
tMD_MethodDef *pVirtualOveriddenMethod;
pVirtualOveriddenMethod = FindVirtualOverriddenMethod(pTypeDef->pParent, pMethodDef);
Assert(pVirtualOveriddenMethod != NULL);
pMethodDef->vTableOfs = pVirtualOveriddenMethod->vTableOfs;
}
}
else
{
// Dummy value - make it obvious it's not valid!
pMethodDef->vTableOfs = 0xffffffff;
}
}
// Create the virtual method table
pTypeDef->numVirtualMethods = virtualOfs;
// Resolve fields, members, interfaces.
// Only needs to be done if it's not a generic definition type
// It it's not a value-type and the stack-size is not preset, then set it up now.
// It needs to be done here as non-static fields in non-value types can point to the containing type
if (pTypeDef->stackSize == 0 && !pTypeDef->isValueType)
{
pTypeDef->stackType = EVALSTACK_O;
pTypeDef->stackSize = sizeof(void*);
}
// Resolve all fields - instance ONLY at this point,
// because static fields in value-types can be of the containing type, and the size is not yet known.
firstIdx = pTypeDef->fieldList;
lastIdx = firstIdx + pTypeDef->numFields - 1;
staticMemSize = 0;
if (pTypeDef->numFields > 0)
{
pTypeDef->ppFields = mallocForever(pTypeDef->numFields * sizeof(tMD_FieldDef*));
}
instanceMemSize = (pTypeDef->pParent == NULL)?0:pTypeDef->pParent->instanceMemSize;
for (token = firstIdx, i=0; token <= lastIdx; token++, i++)
{
tMD_FieldDef *pFieldDef;
pFieldDef = MetaData_GetFieldDefFromDefOrRef(pMetaData, token, ppClassTypeArgs, ppMethodTypeArgs);
if (!FIELD_ISSTATIC(pFieldDef))
{
// Only handle non-static fields at the moment
if (pTypeDef->pGenericDefinition != NULL)
{
// If this is a generic instantiation type, then all field defs need to be copied,
// as there will be lots of different instantiations.
tMD_FieldDef *pFieldCopy = TMALLOCFOREVER(tMD_FieldDef);
memcpy(pFieldCopy, pFieldDef, sizeof(tMD_FieldDef));
pFieldDef = pFieldCopy;
}
if (FIELD_ISLITERAL(pFieldDef) || FIELD_HASFIELDRVA(pFieldDef))
{
// If it's a literal, then analyse the field, but don't include it in any memory allocation
// If is has an RVA, then analyse the field, but don't include it in any memory allocation
MetaData_Fill_FieldDef(pTypeDef, pFieldDef, 0, ppClassTypeArgs);
}
else
{
MetaData_Fill_FieldDef(pTypeDef, pFieldDef, instanceMemSize, ppClassTypeArgs);
instanceMemSize += pFieldDef->memSize;
}
pTypeDef->ppFields[i] = pFieldDef;
}
}
if (pTypeDef->instanceMemSize == 0)
{
pTypeDef->instanceMemSize = instanceMemSize;
}
// Sort out stack type and size.
// Note that this may already be set, as some basic types have this preset;
// or if it's not a value-type it'll already be set
if (pTypeDef->stackSize == 0)
{
// if it gets here then it must be a value type
pTypeDef->stackType = EVALSTACK_VALUETYPE;
pTypeDef->stackSize = pTypeDef->instanceMemSize;
}
// Sort out array element size. Note that some basic types will have this preset.
if (pTypeDef->arrayElementSize == 0)
{
pTypeDef->arrayElementSize = pTypeDef->stackSize;
}
// Handle static fields
for (token = firstIdx, i=0; token <= lastIdx; token++, i++)
{
tMD_FieldDef *pFieldDef;
pFieldDef = MetaData_GetFieldDefFromDefOrRef(pMetaData, token, ppClassTypeArgs, ppMethodTypeArgs);
if (FIELD_ISSTATIC(pFieldDef))
{
// Only handle static fields here
if (pTypeDef->pGenericDefinition != NULL)
{
// If this is a generic instantiation type, then all field defs need to be copied,
// as there will be lots of different instantiations.
tMD_FieldDef *pFieldCopy = TMALLOCFOREVER(tMD_FieldDef);
memcpy(pFieldCopy, pFieldDef, sizeof(tMD_FieldDef));
pFieldDef = pFieldCopy;
}
if (FIELD_ISLITERAL(pFieldDef) || FIELD_HASFIELDRVA(pFieldDef))
{
// If it's a literal, then analyse the field, but don't include it in any memory allocation
// If is has an RVA, then analyse the field, but don't include it in any memory allocation
MetaData_Fill_FieldDef(pTypeDef, pFieldDef, 0, ppClassTypeArgs);
}
else
{
MetaData_Fill_FieldDef(pTypeDef, pFieldDef, staticMemSize, ppClassTypeArgs);
staticMemSize += pFieldDef->memSize;
}
pTypeDef->ppFields[i] = pFieldDef;
}
}
if (staticMemSize > 0) {
pTypeDef->pStaticFields = mallocForever(staticMemSize);
memset(pTypeDef->pStaticFields, 0, staticMemSize);
// Set the field addresses (->pMemory) of all static fields
for (i = 0; i<pTypeDef->numFields; i++) {
tMD_FieldDef *pFieldDef;
pFieldDef = pTypeDef->ppFields[i];
if (FIELD_ISSTATIC(pFieldDef) && pFieldDef->pMemory == NULL) {
// Only set it if it isn't already set. It will be already set if this field has an RVA
pFieldDef->pMemory = pTypeDef->pStaticFields + pFieldDef->memOffset;
}
}
pTypeDef->staticFieldSize = staticMemSize;
}
// Resolve all members
firstIdx = pTypeDef->methodList;
lastIdx = firstIdx + pTypeDef->numMethods - 1;
pTypeDef->ppMethods = mallocForever(pTypeDef->numMethods * sizeof(tMD_MethodDef*));
pTypeDef->pVTable = mallocForever(pTypeDef->numVirtualMethods * sizeof(tMD_MethodDef*));
// Copy initial vTable from parent
if (pTypeDef->pParent != NULL) {
memcpy(pTypeDef->pVTable, pTypeDef->pParent->pVTable, pTypeDef->pParent->numVirtualMethods * sizeof(tMD_MethodDef*));
}
for (token = firstIdx, i = 0; token <= lastIdx; token++, i++) {
tMD_MethodDef *pMethodDef;
pMethodDef = MetaData_GetMethodDefFromDefRefOrSpec(pMetaData, token, ppClassTypeArgs, ppMethodTypeArgs);
if (pTypeDef->pGenericDefinition != NULL) {
// If this is a generic instantiation type, then all method defs need to be copied,
// as there will be lots of different instantiations.
tMD_MethodDef *pMethodCopy = TMALLOCFOREVER(tMD_MethodDef);
memcpy(pMethodCopy, pMethodDef, sizeof(tMD_MethodDef));
pMethodDef = pMethodCopy;
}
if (METHOD_ISSTATIC(pMethodDef) && strcmp(pMethodDef->name, ".cctor") == 0) {
// This is a static constructor
pTypeDef->pStaticConstructor = pMethodDef;
}
if (!METHOD_ISSTATIC(pMethodDef) && pTypeDef->pParent != NULL &&
strcmp(pMethodDef->name, "Finalize") == 0) {
// This is a Finalizer method, but not for Object.
// Delibrately miss out Object's Finalizer because it's empty and will cause every object
// of any type to have a Finalizer which will be terrible for performance.
pTypeDef->pFinalizer = pMethodDef;
}
if (METHOD_ISVIRTUAL(pMethodDef)) {
// This is a virtual method, so enter it in the vTable
pTypeDef->pVTable[pMethodDef->vTableOfs] = pMethodDef;
}
pTypeDef->ppMethods[i] = pMethodDef;
}
// Find inherited Finalizer, if this type doesn't have an explicit Finalizer, and if there is one
if (pTypeDef->pFinalizer == NULL) {
tMD_TypeDef *pInheritedType = pTypeDef->pParent;
while (pInheritedType != NULL) {
if (pInheritedType->pFinalizer != NULL) {
pTypeDef->pFinalizer = pInheritedType->pFinalizer;
break;
}
pInheritedType = pInheritedType->pParent;
}
}
// Fill all method definitions for this type
for (i=0; i<pTypeDef->numMethods; i++) {
MetaData_Fill_MethodDef(pTypeDef, pTypeDef->ppMethods[i], ppClassTypeArgs, ppMethodTypeArgs);
}
// Map all interface method calls. This only needs to be done for Classes, not Interfaces
// And is not done for generic definitions.
if (!TYPE_ISINTERFACE(pTypeDef)) {
firstIdx = 0;
if (pTypeDef->pParent != NULL) {
j = pTypeDef->numInterfaces = pTypeDef->pParent->numInterfaces;
} else {
j = 0;
}
// TODO: Better to do this once during file load (the bit in this for loop)
for (i=1; i<=pMetaData->tables.numRows[MD_TABLE_INTERFACEIMPL]; i++) {
tMD_InterfaceImpl *pInterfaceImpl;
pInterfaceImpl = (tMD_InterfaceImpl*)MetaData_GetTableRow(pMetaData, MAKE_TABLE_INDEX(MD_TABLE_INTERFACEIMPL, i));
if (pInterfaceImpl->class_ == pTypeDef->tableIndex) {
// count how many interfaces are implemented
pTypeDef->numInterfaces++;
if (firstIdx == 0) {
firstIdx = MAKE_TABLE_INDEX(MD_TABLE_INTERFACEIMPL, i);
}
lastIdx = MAKE_TABLE_INDEX(MD_TABLE_INTERFACEIMPL, i);
}
}
if (pTypeDef->numInterfaces > 0 && !pTypeDef->isGenericDefinition) {
U32 mapNum;
pTypeDef->pInterfaceMaps = (tInterfaceMap*)mallocForever(pTypeDef->numInterfaces * sizeof(tInterfaceMap));
// Copy interface maps from parent type
if (j > 0) {
memcpy(pTypeDef->pInterfaceMaps, pTypeDef->pParent->pInterfaceMaps, j * sizeof(tInterfaceMap));
}
mapNum = j;
if (firstIdx > 0) {
for (token=firstIdx; token<=lastIdx; token++, mapNum++) {
tMD_InterfaceImpl *pInterfaceImpl;
pInterfaceImpl = (tMD_InterfaceImpl*)MetaData_GetTableRow(pMetaData, token);
if (pInterfaceImpl->class_ == pTypeDef->tableIndex) {
tMD_TypeDef *pInterface;
tInterfaceMap *pMap;
// Get the interface that this type implements
pInterface = MetaData_GetTypeDefFromDefRefOrSpec(pMetaData, pInterfaceImpl->interface_, ppClassTypeArgs, ppMethodTypeArgs);
MetaData_Fill_TypeDef(pInterface, NULL, NULL);
pMap = &pTypeDef->pInterfaceMaps[mapNum];
pMap->pInterface = pInterface;
pMap->pVTableLookup = (U32*)mallocForever(pInterface->numVirtualMethods * sizeof(U32));
pMap->ppMethodVLookup = NULL;
// Discover interface mapping for each interface method
for (i=0; i<pInterface->numVirtualMethods; i++) {
tMD_MethodDef *pInterfaceMethod, *pOverriddenMethod;
pInterfaceMethod = pInterface->pVTable[i];
pOverriddenMethod = FindVirtualOverriddenMethod(pTypeDef, pInterfaceMethod);
Assert(pOverriddenMethod != NULL);
pMap->pVTableLookup[i] = pOverriddenMethod->vTableOfs;
}
} else {
Crash("Problem with interface class");
}
}
}
}
}
// If this is an enum type, then pretend its stack type is its underlying type
if (pTypeDef->pParent == types[TYPE_SYSTEM_ENUM]) {
pTypeDef->stackType = EVALSTACK_INT32;
}
}
// If this is a nested type, then find the namespace of it
if (pTypeDef->pNestedIn != NULL) {
tMD_TypeDef *pRootTypeDef = pTypeDef->pNestedIn;
while (pRootTypeDef->pNestedIn != NULL) {
pRootTypeDef = pRootTypeDef->pNestedIn;
}
pTypeDef->nameSpace = pRootTypeDef->nameSpace;
}
log_f(2, "Type: %s.%s\n", pTypeDef->nameSpace, pTypeDef->name);
}
U32 Type_IsAssignableFrom(tMD_TypeDef *pToType, tMD_TypeDef *pFromType) {
return
Type_IsDerivedFromOrSame(pToType, pFromType) ||
(TYPE_ISINTERFACE(pToType) && Type_IsImplemented(pToType, pFromType));
}