public static int ReadStringObjectSizeInBytes(BytesAndOffset bo, VirtualMachineInformation virtualMachineInformation)
{
var lengthPointer = bo.Add(virtualMachineInformation.objectHeaderSize);
var length = lengthPointer.ReadInt32();
return(virtualMachineInformation.objectHeaderSize + /*lengthfield*/ 1 + (length * /*utf16=2bytes per char*/ 2) + /*2 zero terminators*/ 2);
}
static void CrawlRawObjectData(IntermediateCrawlData crawlData, BytesAndOffset bytesAndOffset, int iTypeDescription, bool useStaticFields, ulong ptrFrom, int indexOfFrom)
{
var snapshot = crawlData.CachedMemorySnapshot;
var fields = useStaticFields ? snapshot.typeDescriptions.fieldIndicesOwned_static[iTypeDescription] : snapshot.typeDescriptions.fieldIndices_instance[iTypeDescription];
foreach (var iField in fields)
{
int iField_TypeDescription_TypeIndex = snapshot.fieldDescriptions.typeIndex[iField];
int iField_TypeDescription_ArrayIndex = snapshot.typeDescriptions.TypeIndex2ArrayIndex(iField_TypeDescription_TypeIndex);
var fieldLocation = bytesAndOffset.Add(snapshot.fieldDescriptions.offset[iField] - (useStaticFields ? 0 : snapshot.virtualMachineInformation.objectHeaderSize));
if (snapshot.typeDescriptions.HasFlag(iField_TypeDescription_ArrayIndex, TypeFlags.kValueType))
{
CrawlRawObjectData(crawlData, fieldLocation, iField_TypeDescription_ArrayIndex, useStaticFields, ptrFrom, indexOfFrom);
continue;
}
ulong fieldAddr;
if (fieldLocation.TryReadPointer(out fieldAddr) == BytesAndOffset.PtrReadError.Success)
{
crawlData.CrawlDataStack.Push(new StackCrawlData()
{
ptr = fieldAddr, ptrFrom = ptrFrom, typeFrom = iTypeDescription, indexOfFrom = indexOfFrom, fieldFrom = iField, fromArrayIndex = -1
});
}
}
}
public static string ReadString(BytesAndOffset bo, VirtualMachineInformation virtualMachineInformation)
{
var lengthPointer = bo.Add(virtualMachineInformation.objectHeaderSize);
var length = lengthPointer.ReadInt32();
var firstChar = lengthPointer.Add(4);
return(System.Text.Encoding.Unicode.GetString(firstChar.bytes, firstChar.offset, length * 2));
}
static void CrawlRawObjectData(IntermediateCrawlData crawlData, BytesAndOffset bytesAndOffset, int iTypeDescription, bool useStaticFields, ulong ptrFrom, int indexOfFrom)
{
var snapshot = crawlData.CachedMemorySnapshot;
var fields = useStaticFields ? snapshot.typeDescriptions.fieldIndicesOwned_static[iTypeDescription] : snapshot.typeDescriptions.fieldIndices_instance[iTypeDescription];
foreach (var iField in fields)
{
int iField_TypeDescription_TypeIndex = snapshot.fieldDescriptions.typeIndex[iField];
int iField_TypeDescription_ArrayIndex = snapshot.typeDescriptions.TypeIndex2ArrayIndex(iField_TypeDescription_TypeIndex);
var fieldLocation = bytesAndOffset.Add(snapshot.fieldDescriptions.offset[iField] - (useStaticFields ? 0 : snapshot.virtualMachineInformation.objectHeaderSize));
if (snapshot.typeDescriptions.HasFlag(iField_TypeDescription_ArrayIndex, TypeFlags.kValueType))
{
CrawlRawObjectData(crawlData, fieldLocation, iField_TypeDescription_ArrayIndex, useStaticFields, ptrFrom, indexOfFrom);
continue;
}
//Workaround that was done to not error out when trying to read an array where the remaining length is less than that pointer size.
bool gotException = false;
try
{
fieldLocation.ReadPointer();
}
catch (ArgumentException)
{
gotException = true;
}
if (!gotException)
{
crawlData.CrawlDataStack.Push(new StackCrawlData()
{
ptr = fieldLocation.ReadPointer(), ptrFrom = ptrFrom, typeFrom = iTypeDescription, indexOfFrom = indexOfFrom, fieldFrom = iField, fromArrayIndex = -1
});
}
}
}
public BytesAndOffset GetArrayElement(int index)
{
return(data.Add(elementSize * index));
}
// Returns a new ObjectData pointing to the object's (that this ObjectData is currently pointing at) field
// using a field index from snapshot.fieldDescriptions
public ObjectData GetInstanceFieldBySnapshotFieldIndex(CachedSnapshot snapshot, int iField, bool expandToTarget)
{
ObjectData obj;
ulong objectPtr;
switch (m_dataType)
{
case ObjectDataType.ReferenceObject:
objectPtr = GetReferencePointer();
obj = FromManagedPointer(snapshot, objectPtr);
break;
case ObjectDataType.BoxedValue:
case ObjectDataType.Object:
case ObjectDataType.Value:
objectPtr = m_data.managed.objectPtr;
obj = this;
break;
//case ObjectDataType.ReferenceArray:
default:
//TODO: add proper handling for missing types
//DebugUtility.LogError("Requesting a field on an invalid data type");
return(new ObjectData());
}
var fieldOffset = snapshot.fieldDescriptions.offset[iField];
var fieldType = snapshot.fieldDescriptions.typeIndex[iField];
bool isStatic = snapshot.fieldDescriptions.isStatic[iField];
switch (m_dataType)
{
case ObjectDataType.Value:
if (!isStatic)
{
fieldOffset -= snapshot.virtualMachineInformation.objectHeaderSize;
}
break;
case ObjectDataType.Object:
case ObjectDataType.BoxedValue:
break;
case ObjectDataType.Type:
if (!isStatic)
{
Debug.LogError("Requesting a non-static field on a type");
return(invalid);
}
break;
default:
break;
}
ObjectData o = new ObjectData();
o.m_Parent = new ObjectDataParent(obj, iField, -1, expandToTarget);
o.SetManagedType(snapshot, fieldType);
o.m_dataType = TypeToSubDataType(snapshot, fieldType);
if (isStatic)
{
//the field requested might come from a base class. make sure we are using the right staticFieldBytes.
var iOwningType = obj.m_data.managed.iType;
while (iOwningType >= 0)
{
var fieldIndex = System.Array.FindIndex(snapshot.typeDescriptions.fieldIndicesOwned_static[iOwningType], x => x == iField);
if (fieldIndex >= 0)
{
//field iField is owned by type iCurrentBase
break;
}
iOwningType = snapshot.typeDescriptions.baseOrElementTypeIndex[iOwningType];
}
if (iOwningType < 0)
{
Debug.LogError("Field requested is not owned by the type not any of its bases");
return(invalid);
}
o.m_data.managed.objectPtr = 0;
var typeStaticData = new BytesAndOffset(snapshot.typeDescriptions.staticFieldBytes[iOwningType], snapshot.virtualMachineInformation.pointerSize);
o.managedObjectData = typeStaticData.Add(fieldOffset);
}
else
{
o.m_data.managed.objectPtr = objectPtr;// m_data.managed.objectPtr;
o.managedObjectData = obj.managedObjectData.Add(fieldOffset);
}
return(o);
}