Attempt to fix memory leak

Source/MemoryLeakFix.cs

@@ -0,0 +1,231 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using RimWorld;
+using Verse;
+using Verse.Profile;
+
+namespace ZhentarFix
+{
+	class MemoryLeakFix : Game
+	{
+		[DetourMember]
+		public void DeinitAndRemoveMap(Map map)
+		{
+			if (map == null)
+			{
+				Log.Error("Tried to remove null map.");
+				return;
+			}
+			var maps = Maps;
+			if (!maps.Contains(map))
+			{
+				Log.Error("Tried to remove map " + map + " but it's not here.");
+				return;
+			}
+			bool flag = map.ParentFaction != null && map.ParentFaction.HostileTo(Faction.OfPlayer);
+			List<Pawn> list = map.mapPawns.AllPawns.ToList();
+			for (int i = 0; i < list.Count; i++)
+			{
+				try
+				{
+					Pawn pawn = list[i];
+					if (pawn.Spawned)
+					{
+						pawn.DeSpawn();
+					}
+					if (pawn.IsColonist && flag)
+					{
+						map.ParentFaction.kidnapped.KidnapPawn(pawn, null);
+					}
+					else
+					{
+						Find.WorldPawns.PassToWorld(pawn);
+					}
+				}
+				catch (Exception ex)
+				{
+					Log.Error(string.Concat("Could not despawn and pass to world ", list[i], ": ", ex));
+				}
+			}
+
+			//Clear out regions so they don't hold other objects live
+			foreach (var region in map.regionGrid.AllRegions)
+			{
+				region.Room = null; region.links = null; listerThingsInfo.SetValue(region, null);
+				//have to do this before the notify_ calls run
+			}
+
+			List<Faction> allFactionsListForReading = Find.FactionManager.AllFactionsListForReading;
+			for (int j = 0; j < allFactionsListForReading.Count; j++)
+			{
+				allFactionsListForReading[j].Notify_MapRemoved(map);
+			}
+			tickManager.RemoveAllFromMap(map);
+			Map visibleMap = VisibleMap;
+			int num = maps.IndexOf(map);
+			for (int k = num; k < maps.Count; k++)
+			{
+				if (k == num)
+				{
+					RealTime.moteList.RemoveAllFromMap(maps[k]);
+				}
+				else
+				{
+					List<Mote> allMotes = RealTime.moteList.allMotes;
+					for (int l = 0; l < allMotes.Count; l++)
+					{
+						if (allMotes[l].Map == maps[k])
+						{
+							allMotes[l].DecrementMapIndex();
+						}
+					}
+				}
+				List<Thing> allThings = maps[k].listerThings.AllThings;
+				for (int m = 0; m < allThings.Count; m++)
+				{
+					if (k == num)
+					{
+						allThings[m].Notify_MyMapRemoved();
+					}
+					else
+					{
+						allThings[m].DecrementMapIndex();
+					}
+				}
+				List<Room> allRooms = maps[k].regionGrid.allRooms;
+				for (int n = 0; n < allRooms.Count; n++)
+				{
+					if (k == num)
+					{
+						allRooms[n].Notify_MyMapRemoved();
+					}
+					else
+					{
+						allRooms[n].DecrementMapIndex();
+					}
+				}
+				foreach (Region current in maps[k].regionGrid.AllRegions)
+				{
+					if (k == num)
+					{
+						current.Notify_MyMapRemoved();
+					}
+					else
+					{
+						current.DecrementMapIndex();
+					}
+				}
+			}
+			maps.Remove(map);
+			if (visibleMap != null)
+			{
+				sbyte b = (sbyte)maps.IndexOf(visibleMap);
+				if (b < 0)
+				{
+					if (maps.Any())
+					{
+						VisibleMap = maps[0];
+					}
+					else
+					{
+						VisibleMap = null;
+					}
+				}
+				else
+				{
+					visibleMapIndex = b;
+				}
+			}
+			if (Current.ProgramState == ProgramState.Playing)
+			{
+				Find.ColonistBar.MarkColonistsDirty();
+			}
+
+
+
+			//clear all map fields to minimize what is kept live
+			map.cellIndices = null;
+			map.listerThings = null;
+			map.listerBuildings = null;
+			map.mapPawns = null;
+			map.dynamicDrawManager = null;
+			map.mapDrawer = null;
+			map.tooltipGiverList = null;
+			map.pawnDestinationManager = null;
+			map.reservationManager = null;
+			map.physicalInteractionReservationManager = null;
+			map.designationManager = null;
+			map.lordManager = null;
+			map.debugDrawer = null;
+			map.passingShipManager = null;
+			map.slotGroupManager = null;
+			map.mapConditionManager = null;
+			map.weatherManager = null;
+			map.zoneManager = null;
+			map.resourceCounter = null;
+			map.mapTemperature = null;
+			map.temperatureCache = null;
+			map.areaManager = null;
+			map.attackTargetsCache = null;
+			map.attackTargetReservationManager = null;
+			map.lordsStarter = null;
+			map.thingGrid = null;
+			map.coverGrid = null;
+			map.edificeGrid = null;
+			map.fogGrid = null;
+			map.glowGrid = null;
+			map.regionGrid = null;
+			map.terrainGrid = null;
+			map.pathGrid = null;
+			map.roofGrid = null;
+			map.fertilityGrid = null;
+			map.snowGrid = null;
+			map.deepResourceGrid = null;
+			map.exitMapGrid = null;
+			map.linkGrid = null;
+			map.glowFlooder = null;
+			map.powerNetManager = null;
+			map.powerNetGrid = null;
+			map.regionMaker = null;
+			map.pathFinder = null;
+			map.pawnPathPool = null;
+			map.regionAndRoomUpdater = null;
+			map.regionLinkDatabase = null;
+			map.moteCounter = null;
+			map.gatherSpotLister = null;
+			map.windManager = null;
+			map.listerBuildingsRepairable = null;
+			map.listerHaulables = null;
+			map.listerFilthInHomeArea = null;
+			map.reachability = null;
+			map.itemAvailability = null;
+			map.autoBuildRoofAreaSetter = null;
+			map.roofCollapseBufferResolver = null;
+			map.roofCollapseBuffer = null;
+			map.wildSpawner = null;
+			map.steadyAtmosphereEffects = null;
+			map.skyManager = null;
+			map.overlayDrawer = null;
+			map.floodFiller = null;
+			map.weatherDecider = null;
+			map.fireWatcher = null;
+			map.dangerWatcher = null;
+			map.damageWatcher = null;
+			map.strengthWatcher = null;
+			map.wealthWatcher = null;
+			map.regionDirtyer = null;
+			map.cellsInRandomOrder = null;
+			map.rememberedCameraPos = null;
+			map.mineStrikeManager = null;
+			map.components = null;
+
+
+			MemoryUtility.UnloadUnusedUnityAssets(); //Unload meshes
+		}
+
+		private static readonly FieldInfo listerThingsInfo = typeof(Region).GetField("listerThings", Detours.UniversalBindingFlags);
+	}
+}

ZhentarFix.csproj

@@ -55,6 +55,7 @@
     <Compile Include="Source\FirefightingFixes.cs" />
     <Compile Include="Source\FoodUtilityFix.cs" />
     <Compile Include="Source\GaydarFix.cs" />
+    <Compile Include="Source\MemoryLeakFix.cs" />
     <Compile Include="Source\PawnRotatorFix.cs" />
     <Compile Include="Source\Properties\AssemblyInfo.cs" />
     <Compile Include="Source\UIScaleFix.cs" />