public static void Read(System.IO.BinaryReader reader, out PackedConnection[] value, out string stateString)
{
value = new PackedConnection[0];
stateString = "";
var version = reader.ReadInt32();
if (version >= 1)
{
var length = reader.ReadInt32();
//stateString = string.Format("Loading {0} Object Connections", length);
value = new PackedConnection[length];
if (length == 0)
{
return;
}
var onePercent = Math.Max(1, value.Length / 100);
for (int n = 0, nend = value.Length; n < nend; ++n)
{
if ((n % onePercent) == 0)
{
stateString = string.Format("Loading Object Connections\n{0}/{1}, {2:F0}% done", n + 1, length, ((n + 1) / (float)length) * 100);
}
value[n].from = reader.ReadInt32();
value[n].to = reader.ReadInt32();
}
}
}
/// <summary>
/// Loads a memory snapshot from the specified 'filePath' and stores the result in 'snapshot'.
/// </summary>
/// <param name="filePath">Absolute file path</param>
public bool LoadFromFile(string filePath)
{
busyString = "Loading";
using (var fileStream = new System.IO.FileStream(filePath, System.IO.FileMode.Open))
{
using (var reader = new System.IO.BinaryReader(fileStream))
{
try
{
PackedMemorySnapshotHeader.Read(reader, out header, out busyString);
if (!header.isValid)
{
throw new Exception("Invalid header.");
}
PackedNativeType.Read(reader, out nativeTypes, out busyString);
PackedNativeUnityEngineObject.Read(reader, out nativeObjects, out busyString);
PackedGCHandle.Read(reader, out gcHandles, out busyString);
PackedConnection.Read(reader, out connections, out busyString);
PackedMemorySection.Read(reader, out managedHeapSections, out busyString);
PackedManagedType.Read(reader, out managedTypes, out busyString);
PackedVirtualMachineInformation.Read(reader, out virtualMachineInformation, out busyString);
}
catch (System.Exception e)
{
Debug.LogException(e);
return(false);
}
}
}
return(true);
}
/// <summary>
/// Converts an Unity PackedMemorySnapshot to our own format.
/// </summary>
public static PackedMemorySnapshot FromMemoryProfiler(MemorySnapshotProcessingArgs args)
{
var source = args.source;
var value = new PackedMemorySnapshot();
try
{
VerifyMemoryProfilerSnapshot(source);
value.busyString = "Loading Header";
value.header = PackedMemorySnapshotHeader.FromMemoryProfiler();
value.busyString = string.Format("Loading {0} Native Types", source.nativeTypes.Length);
value.nativeTypes = PackedNativeType.FromMemoryProfiler(source.nativeTypes);
value.busyString = string.Format("Loading {0} Native Objects", source.nativeObjects.Length);
value.nativeObjects = PackedNativeUnityEngineObject.FromMemoryProfiler(source.nativeObjects);
value.busyString = string.Format("Loading {0} GC Handles", source.gcHandles.Length);
value.gcHandles = PackedGCHandle.FromMemoryProfiler(source.gcHandles);
value.busyString = string.Format("Loading {0} Object Connections", source.connections.Length);
if (args.excludeNativeFromConnections)
{
value.connections = ConnectionsFromMemoryProfilerWithoutNativeHACK(value, source);
}
else
{
value.connections = PackedConnection.FromMemoryProfiler(source.connections);
}
value.busyString = string.Format("Loading {0} Managed Heap Sections", source.managedHeapSections.Length);
value.managedHeapSections = PackedMemorySection.FromMemoryProfiler(source.managedHeapSections);
value.busyString = string.Format("Loading {0} Managed Types", source.typeDescriptions.Length);
value.managedTypes = PackedManagedType.FromMemoryProfiler(source.typeDescriptions);
value.busyString = "Loading VM Information";
value.virtualMachineInformation = PackedVirtualMachineInformation.FromMemoryProfiler(source.virtualMachineInformation);
}
catch (System.Exception e)
{
Debug.LogException(e);
value = null;
throw;
}
return(value);
}
/// <summary>
/// Saves the specfified memory snapshot as a file, using the specified 'filePath'.
/// </summary>
public void SaveToFile(string filePath)
{
using (var fileStream = new System.IO.FileStream(filePath, System.IO.FileMode.OpenOrCreate))
{
using (var writer = new System.IO.BinaryWriter(fileStream))
{
PackedMemorySnapshotHeader.Write(writer, header);
PackedNativeType.Write(writer, nativeTypes);
PackedNativeUnityEngineObject.Write(writer, nativeObjects);
PackedGCHandle.Write(writer, gcHandles);
PackedConnection.Write(writer, connections);
PackedMemorySection.Write(writer, managedHeapSections);
PackedManagedType.Write(writer, managedTypes);
PackedVirtualMachineInformation.Write(writer, virtualMachineInformation);
}
}
}
// this method is a hack that excludes native object connections to workaround an unity bug.
// https://forum.unity.com/threads/wip-heap-explorer-memory-profiler-debugger-and-analyzer-for-unity.527949/page-2#post-3615223
static PackedConnection[] ConnectionsFromMemoryProfilerWithoutNativeHACK(PackedMemorySnapshot snapshot, UnityEditor.MemoryProfiler.PackedMemorySnapshot source)
{
var managedStart = 0;
var managedEnd = managedStart + source.gcHandles.Length;
var nativeStart = managedStart + managedEnd;
var nativeEnd = nativeStart + source.nativeObjects.Length;
var output = new List <PackedConnection>(1024 * 1024);
for (int n = 0, nend = source.connections.Length; n < nend; ++n)
{
if ((n % (nend / 100)) == 0)
{
var progress = ((n + 1.0f) / nend) * 100;
snapshot.busyString = string.Format("Analyzing GCHandle Connections\n{0}/{1}, {2:F0}% done", n + 1, source.connections.Length, progress);
}
var connection = new PackedConnection
{
from = source.connections[n].from,
to = source.connections[n].to,
};
connection.fromKind = PackedConnection.Kind.GCHandle;
if (connection.from >= nativeStart && connection.from < nativeEnd)
{
connection.from -= nativeStart;
connection.fromKind = PackedConnection.Kind.Native;
}
connection.toKind = PackedConnection.Kind.GCHandle;
if (connection.to >= nativeStart && connection.to < nativeEnd)
{
connection.to -= nativeStart;
connection.toKind = PackedConnection.Kind.Native;
}
if (connection.fromKind != PackedConnection.Kind.Native)
{
output.Add(connection);
}
}
snapshot.header.nativeObjectFromConnectionsExcluded = true;
Debug.LogWarning("HeapExplorer: Native object 'from' connections are excluded due workaround an Unity bug. Thus the object connections in Heap Explorer show fewer connections than actually exist.\nhttps://forum.unity.com/threads/wip-heap-explorer-memory-profiler-debugger-and-analyzer-for-unity.527949/page-2#post-3615223");
return(output.ToArray());
}
/// <summary>
/// Add a connection between two objects, such as a connection from a native object to its managed counter-part.
/// </summary>
/// <param name="fromKind">The connection kind, that is pointing to another object.</param>
/// <param name="fromIndex">An index into a snapshot array, depending on specified fromKind. If the kind would be 'Native', then it must be an index into the snapshot.nativeObjects array.</param>
/// <param name="toKind">The connection kind, to which the 'from' object is pointing to.</param>
/// <param name="toIndex">An index into a snapshot array, depending on the specified toKind. If the kind would be 'Native', then it must be an index into the snapshot.nativeObjects array.</param>
public void AddConnection(PackedConnection.Kind fromKind, int fromIndex, PackedConnection.Kind toKind, int toIndex)
{
var connection = new PackedConnection
{
fromKind = fromKind,
from = fromIndex,
toKind = toKind,
to = toIndex
};
if (connection.fromKind != PackedConnection.Kind.None && connection.from != -1)
{
var key = ComputeConnectionKey(connection.fromKind, connection.from);
List <PackedConnection> list;
if (!m_ConnectionsFrom.TryGetValue(key, out list))
{
m_ConnectionsFrom[key] = list = new List <PackedConnection>(1); // Capacity=1 to reduce memory usage on HUGE memory snapshots
}
list.Add(connection);
}
if (connection.toKind != PackedConnection.Kind.None && connection.to != -1)
{
if (connection.to < 0)
{
connection.to = -connection.to;
}
var key = ComputeConnectionKey(connection.toKind, connection.to);
List <PackedConnection> list;
if (!m_ConnectionsTo.TryGetValue(key, out list))
{
m_ConnectionsTo[key] = list = new List <PackedConnection>(1); // Capacity=1 to reduce memory usage on HUGE memory snapshots
}
list.Add(connection);
}
}
public static PackedConnection[] FromMemoryProfiler(UnityEditor.MemoryProfiler.Connection[] source)
{
PackedConnection[] value = null;
try
{
value = new PackedConnection[source.Length];
}
catch
{
Debug.LogErrorFormat("HeapExplorer: Failed to allocate 'new PackedConnection[{0}]'.", source.Length);
throw;
}
for (int n = 0, nend = source.Length; n < nend; ++n)
{
value[n] = new PackedConnection
{
from = source[n].from,
to = source[n].to,
};
}
return(value);
}
public static PackedConnection[] FromMemoryProfiler(UnityEditor.Profiling.Memory.Experimental.PackedMemorySnapshot snapshot)
{
var result = new List <PackedConnection>(1024 * 1024);
var invalidIndices = 0;
// Get all NativeObject instanceIds
var nativeObjects = snapshot.nativeObjects;
var nativeObjectsCount = nativeObjects.GetNumEntries();
var nativeObjectsInstanceIds = new int[nativeObjects.instanceId.GetNumEntries()];
nativeObjects.instanceId.GetEntries(0, nativeObjects.instanceId.GetNumEntries(), ref nativeObjectsInstanceIds);
// Create lookup table from instanceId to NativeObject arrayindex
var instanceIdToNativeObjectIndex = new Dictionary <int, int>(nativeObjectsInstanceIds.Length);
for (var n = 0; n < nativeObjectsInstanceIds.Length; ++n)
{
instanceIdToNativeObjectIndex.Add(nativeObjectsInstanceIds[n], n);
}
// Connect NativeObject with its GCHandle
var nativeObjectsGCHandleIndices = new int[nativeObjects.gcHandleIndex.GetNumEntries()];
nativeObjects.gcHandleIndex.GetEntries(0, nativeObjects.gcHandleIndex.GetNumEntries(), ref nativeObjectsGCHandleIndices);
var gcHandles = snapshot.gcHandles;
var gcHandlesCount = gcHandles.GetNumEntries();
for (var n = 0; n < nativeObjectsGCHandleIndices.Length; ++n)
{
// Unity 2019.4.7f1 and earlier (maybe also newer) versions seem to have this issue:
// (Case 1269293) PackedMemorySnapshot: nativeObjects.gcHandleIndex contains -1 always
if (nativeObjectsGCHandleIndices[n] < 0 || nativeObjectsGCHandleIndices[n] >= gcHandlesCount)
{
if (nativeObjectsGCHandleIndices[n] != -1)
{
invalidIndices++; // I guess -1 means no connection to a gcHandle
}
continue;
}
var packed = new PackedConnection();
packed.from = n; // nativeObject index
packed.fromKind = Kind.Native;
packed.to = nativeObjectsGCHandleIndices[n]; // gcHandle index
packed.toKind = Kind.GCHandle;
result.Add(packed);
}
if (invalidIndices > 0)
{
Debug.LogErrorFormat("Reconstructing native to gchandle connections. Found {0} invalid indices into nativeObjectsGCHandleIndices[{1}] array.", invalidIndices, gcHandlesCount);
}
// Connect NativeObject with NativeObject
var source = snapshot.connections;
int[] sourceFrom = new int[source.from.GetNumEntries()];
source.from.GetEntries(0, source.from.GetNumEntries(), ref sourceFrom);
int[] sourceTo = new int[source.to.GetNumEntries()];
source.to.GetEntries(0, source.to.GetNumEntries(), ref sourceTo);
var invalidInstanceIDs = 0;
invalidIndices = 0;
for (int n = 0, nend = sourceFrom.Length; n < nend; ++n)
{
var packed = new PackedConnection();
if (!instanceIdToNativeObjectIndex.TryGetValue(sourceFrom[n], out packed.from))
{
invalidInstanceIDs++;
continue; // NativeObject InstanceID not found
}
if (!instanceIdToNativeObjectIndex.TryGetValue(sourceTo[n], out packed.to))
{
invalidInstanceIDs++;
continue; // NativeObject InstanceID not found
}
if (packed.from < 0 || packed.from >= nativeObjectsCount)
{
invalidIndices++;
continue; // invalid index into array
}
if (packed.to < 0 || packed.to >= nativeObjectsCount)
{
invalidIndices++;
continue; // invalid index into array
}
packed.fromKind = Kind.Native;
packed.toKind = Kind.Native;
result.Add(packed);
}
if (invalidIndices > 0)
{
Debug.LogErrorFormat("Reconstructing native to native object connections. Found {0} invalid indices into nativeObjectsCount[{1}] array.", invalidIndices, nativeObjectsCount);
}
if (invalidInstanceIDs > 0)
{
Debug.LogErrorFormat("Reconstructing native to native object connections. Found {0} invalid instanceIDs.", invalidInstanceIDs, nativeObjectsCount);
}
return(result.ToArray());
}