private IEnumerable <Connection> AddManagedToNativeConnectionsAndRestoreObjectHeaders(PackedMemorySnapshot packedMemorySnapshot, StartIndices startIndices, PackedCrawlerData packedCrawlerData)
{
if (packedMemorySnapshot.typeDescriptions.Length == 0)
{
yield break;
}
var unityEngineObjectTypeDescription = packedMemorySnapshot.typeDescriptions.First(td => td.name == "UnityEngine.Object");
bool unityEngineObjectHasInstanceIDField = unityEngineObjectTypeDescription.fields.Any(f => f.name == "m_InstanceID");
int instanceIDOffset = -1;
if (unityEngineObjectHasInstanceIDField)
{
instanceIDOffset = unityEngineObjectTypeDescription.fields.Single(f => f.name == "m_InstanceID").offset;
}
#if UNITY_5_4_OR_NEWER
var cachedPtrOffset = unityEngineObjectTypeDescription.fields.Single(f => f.name == "m_CachedPtr").offset;
#endif
for (int i = 0; i != packedCrawlerData.managedObjects.Length; i++)
{
var managedObjectIndex = i + startIndices.OfFirstManagedObject;
var address = packedCrawlerData.managedObjects[i].address;
var typeInfoAddress = RestoreObjectHeader(packedMemorySnapshot.managedHeapSections, address, managedObjectIndex);
if (!DerivesFrom(packedMemorySnapshot.typeDescriptions, _typeInfoToTypeDescription[typeInfoAddress].typeIndex, unityEngineObjectTypeDescription.typeIndex))
{
continue;
}
int indexOfNativeObject = -1;
if (unityEngineObjectHasInstanceIDField)
{
var instanceID = packedMemorySnapshot.managedHeapSections.Find(address + (UInt64)instanceIDOffset, packedMemorySnapshot.virtualMachineInformation).ReadInt32();
indexOfNativeObject = Array.FindIndex(packedMemorySnapshot.nativeObjects, no => no.instanceId == instanceID);
}
#if UNITY_5_4_OR_NEWER // Since Unity 5.4, UnityEngine.Object no longer stores instance id inside when running in the player. Use cached ptr instead to find the index of native object
else
{
// If you get a compilation error on the following 2 lines, update to Unity 5.4b14.
var cachedPtr = packedMemorySnapshot.managedHeapSections.Find(address + (UInt64)cachedPtrOffset, packedMemorySnapshot.virtualMachineInformation).ReadPointer();
indexOfNativeObject = Array.FindIndex(packedMemorySnapshot.nativeObjects, no => (ulong)no.nativeObjectAddress == cachedPtr);
}
#endif
if (indexOfNativeObject != -1)
{
yield return new Connection {
@from = managedObjectIndex, to = indexOfNativeObject + startIndices.OfFirstNativeObject
}
}
;
}
}
