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-rw-r--r--ARMeilleure/Translation/JitCache.cs142
1 files changed, 0 insertions, 142 deletions
diff --git a/ARMeilleure/Translation/JitCache.cs b/ARMeilleure/Translation/JitCache.cs
deleted file mode 100644
index a828b4ed..00000000
--- a/ARMeilleure/Translation/JitCache.cs
+++ /dev/null
@@ -1,142 +0,0 @@
-using ARMeilleure.CodeGen;
-using ARMeilleure.Memory;
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Runtime.InteropServices;
-
-namespace ARMeilleure.Translation
-{
- static class JitCache
- {
- private const int PageSize = 4 * 1024;
- private const int PageMask = PageSize - 1;
-
- private const int CodeAlignment = 4; // Bytes.
- private const int CacheSize = 2047 * 1024 * 1024;
-
- private static ReservedRegion _jitRegion;
- private static int _offset;
-
- private static readonly List<JitCacheEntry> _cacheEntries = new List<JitCacheEntry>();
-
- private static readonly object _lock = new object();
- private static bool _initialized;
-
- public static void Initialize(IJitMemoryAllocator allocator)
- {
- if (_initialized) return;
-
- lock (_lock)
- {
- if (_initialized) return;
-
- _jitRegion = new ReservedRegion(allocator, CacheSize);
-
- if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
- {
- _jitRegion.ExpandIfNeeded((ulong)PageSize);
-
- JitUnwindWindows.InstallFunctionTableHandler(_jitRegion.Pointer, CacheSize);
-
- // The first page is used for the table based SEH structs.
- _offset = PageSize;
- }
-
- _initialized = true;
- }
- }
-
- public static IntPtr Map(CompiledFunction func)
- {
- byte[] code = func.Code;
-
- lock (_lock)
- {
- Debug.Assert(_initialized);
-
- int funcOffset = Allocate(code.Length);
-
- IntPtr funcPtr = _jitRegion.Pointer + funcOffset;
-
- Marshal.Copy(code, 0, funcPtr, code.Length);
-
- ReprotectRange(funcOffset, code.Length);
-
- Add(new JitCacheEntry(funcOffset, code.Length, func.UnwindInfo));
-
- return funcPtr;
- }
- }
-
- private static void ReprotectRange(int offset, int size)
- {
- // Map pages that are already full as RX.
- // Map pages that are not full yet as RWX.
- // On unix, the address must be page aligned.
- int endOffs = offset + size;
-
- int pageStart = offset & ~PageMask;
- int pageEnd = endOffs & ~PageMask;
-
- int fullPagesSize = pageEnd - pageStart;
-
- if (fullPagesSize != 0)
- {
- _jitRegion.Block.MapAsRx((ulong)pageStart, (ulong)fullPagesSize);
- }
-
- int remaining = endOffs - pageEnd;
-
- if (remaining != 0)
- {
- _jitRegion.Block.MapAsRwx((ulong)pageEnd, (ulong)remaining);
- }
- }
-
- private static int Allocate(int codeSize)
- {
- codeSize = checked(codeSize + (CodeAlignment - 1)) & ~(CodeAlignment - 1);
-
- int allocOffset = _offset;
-
- _offset += codeSize;
-
- if (_offset > CacheSize)
- {
- throw new OutOfMemoryException("JIT Cache exhausted.");
- }
-
- _jitRegion.ExpandIfNeeded((ulong)_offset);
-
- return allocOffset;
- }
-
- private static void Add(JitCacheEntry entry)
- {
- _cacheEntries.Add(entry);
- }
-
- public static bool TryFind(int offset, out JitCacheEntry entry)
- {
- lock (_lock)
- {
- foreach (JitCacheEntry cacheEntry in _cacheEntries)
- {
- int endOffset = cacheEntry.Offset + cacheEntry.Size;
-
- if (offset >= cacheEntry.Offset && offset < endOffset)
- {
- entry = cacheEntry;
-
- return true;
- }
- }
- }
-
- entry = default;
-
- return false;
- }
- }
-} \ No newline at end of file