Reset in-memory JIT cache on game quit + fix Purge PPTC (#709)

Jit cache now fully resets when booting a game multiple times.
This should fix random jit cache crashes.
Also removed some redundant code related to region allocation and fixed
PPTC Purge not fully purging all PPTC files in the backup folder.

src/ARMeilleure/Translation/Cache/JitCache.cs

@@ -24,7 +24,7 @@ namespace ARMeilleure.Translation.Cache
 
         private static JitCacheInvalidation _jitCacheInvalidator;
 
-        private static CacheMemoryAllocator _cacheAllocator;
+        private static List<CacheMemoryAllocator> _cacheAllocators = [];
 
         private static readonly List<CacheEntry> _cacheEntries = [];
 
@@ -40,37 +40,48 @@ namespace ARMeilleure.Translation.Cache
 
         public static void Initialize(IJitMemoryAllocator allocator)
         {
-            if (_initialized)
-            {
-                return;
-            }
-
             lock (_lock)
             {
                 if (_initialized)
                 {
-                    return;
+                    if (OperatingSystem.IsWindows())
+                    {
+                        JitUnwindWindows.RemoveFunctionTableHandler(
+                            _jitRegions[0].Pointer);
+                    }
+
+                    for (int i = 0; i < _jitRegions.Count; i++)
+                    {
+                        _jitRegions[i].Dispose();
+                    }
+
+                    _jitRegions.Clear();
+                    _cacheAllocators.Clear();
                 }
+                else
+                {
+                    _initialized = true;
+                }
+
+                _activeRegionIndex = 0;
 
                 ReservedRegion firstRegion = new(allocator, CacheSize);
                 _jitRegions.Add(firstRegion);
-                _activeRegionIndex = 0;
+
+                CacheMemoryAllocator firstCacheAllocator = new(CacheSize);
+                _cacheAllocators.Add(firstCacheAllocator);
 
                 if (!OperatingSystem.IsWindows() && !OperatingSystem.IsMacOS())
                 {
                     _jitCacheInvalidator = new JitCacheInvalidation(allocator);
                 }
 
-                _cacheAllocator = new CacheMemoryAllocator(CacheSize);
-
                 if (OperatingSystem.IsWindows())
                 {
                     JitUnwindWindows.InstallFunctionTableHandler(
                         firstRegion.Pointer, CacheSize, firstRegion.Pointer + Allocate(_pageSize)
                     );
                 }
-
-                _initialized = true;
             }
         }
 
@@ -136,7 +147,7 @@ namespace ARMeilleure.Translation.Cache
 
                     if (TryFind(funcOffset, out CacheEntry entry, out int entryIndex) && entry.Offset == funcOffset)
                     {
-                        _cacheAllocator.Free(funcOffset, AlignCodeSize(entry.Size));
+                        _cacheAllocators[_activeRegionIndex].Free(funcOffset, AlignCodeSize(entry.Size));
                         _cacheEntries.RemoveAt(entryIndex);
                     }
 
@@ -167,30 +178,24 @@ namespace ARMeilleure.Translation.Cache
         {
             codeSize = AlignCodeSize(codeSize);
 
-            for (int i = _activeRegionIndex; i < _jitRegions.Count; i++)
+            int allocOffset = _cacheAllocators[_activeRegionIndex].Allocate(codeSize);
+
+            if (allocOffset >= 0)
             {
-                int allocOffset = _cacheAllocator.Allocate(codeSize);
-        
-                if (allocOffset >= 0)
-                {
-                    _jitRegions[i].ExpandIfNeeded((ulong)allocOffset + (ulong)codeSize);
-                    _activeRegionIndex = i;
-                    return allocOffset;
-                }
+                _jitRegions[_activeRegionIndex].ExpandIfNeeded((ulong)allocOffset + (ulong)codeSize);
+                return allocOffset;
             }
 
             int exhaustedRegion = _activeRegionIndex;
             ReservedRegion newRegion = new(_jitRegions[0].Allocator, CacheSize);
             _jitRegions.Add(newRegion);
             _activeRegionIndex = _jitRegions.Count - 1;
-            
-            int newRegionNumber = _activeRegionIndex;
 
-            Logger.Warning?.Print(LogClass.Cpu, $"JIT Cache Region {exhaustedRegion} exhausted, creating new Cache Region {newRegionNumber} ({((long)(newRegionNumber + 1) * CacheSize).Bytes()} Total Allocation).");
-        
-            _cacheAllocator = new CacheMemoryAllocator(CacheSize);
+            Logger.Warning?.Print(LogClass.Cpu, $"JIT Cache Region {exhaustedRegion} exhausted, creating new Cache Region {_activeRegionIndex} ({((long)(_activeRegionIndex + 1) * CacheSize).Bytes()} Total Allocation).");
+
+            _cacheAllocators.Add(new CacheMemoryAllocator(CacheSize));
 
-            int allocOffsetNew = _cacheAllocator.Allocate(codeSize);
+            int allocOffsetNew = _cacheAllocators[_activeRegionIndex].Allocate(codeSize);
             if (allocOffsetNew < 0)
             {
                 throw new OutOfMemoryException("Failed to allocate in new Cache Region!");

src/ARMeilleure/Translation/Cache/JitUnwindWindows.cs

@@ -52,6 +52,11 @@ namespace ARMeilleure.Translation.Cache
             nint context,
             [MarshalAs(UnmanagedType.LPWStr)] string outOfProcessCallbackDll);
 
+        [LibraryImport("kernel32.dll")]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        private static unsafe partial bool RtlDeleteFunctionTable(
+            ulong tableIdentifier);
+
         private static GetRuntimeFunctionCallback _getRuntimeFunctionCallback;
 
         private static int _sizeOfRuntimeFunction;
@@ -91,6 +96,23 @@ namespace ARMeilleure.Translation.Cache
             }
         }
 
+        public static void RemoveFunctionTableHandler(nint codeCachePointer)
+        {
+            ulong codeCachePtr = (ulong)codeCachePointer.ToInt64();
+
+            bool result;
+
+            unsafe
+            {
+                result = RtlDeleteFunctionTable(codeCachePtr | 3);
+            }
+
+            if (!result)
+            {
+                throw new InvalidOperationException("Failure removing function table callback.");
+            }
+        }
+
         private static unsafe RuntimeFunction* FunctionTableHandler(ulong controlPc, nint context)
         {
             int offset = (int)((long)controlPc - context.ToInt64());

src/Ryujinx/UI/Controls/ApplicationContextMenu.axaml.cs

@@ -200,7 +200,7 @@ namespace Ryujinx.Ava.UI.Controls
                 if (backupDir.Exists)
                 {
                     cacheFiles.AddRange(backupDir.EnumerateFiles("*.cache"));
-                    cacheFiles.AddRange(mainDir.EnumerateFiles("*.info"));
+                    cacheFiles.AddRange(backupDir.EnumerateFiles("*.info"));
                 }
 
                 if (cacheFiles.Count > 0)