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https://github.com/Ryujinx/Ryujinx.git
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* Implement JIT Arm64 backend * PPTC version bump * Address some feedback from Arm64 JIT PR * Address even more PR feedback * Remove unused IsPageAligned function * Sync Qc flag before calls * Fix comment and remove unused enum * Address riperiperi PR feedback * Delete Breakpoint IR instruction that was only implemented for Arm64
198 lines
5.7 KiB
C#
198 lines
5.7 KiB
C#
using ARMeilleure.CodeGen;
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using ARMeilleure.CodeGen.Unwinding;
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using ARMeilleure.Memory;
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using ARMeilleure.Native;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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namespace ARMeilleure.Translation.Cache
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{
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static class JitCache
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{
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private const int PageSize = 4 * 1024;
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private const int PageMask = PageSize - 1;
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private const int CodeAlignment = 4; // Bytes.
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private const int CacheSize = 2047 * 1024 * 1024;
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private static ReservedRegion _jitRegion;
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private static JitCacheInvalidation _jitCacheInvalidator;
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private static CacheMemoryAllocator _cacheAllocator;
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private static readonly List<CacheEntry> _cacheEntries = new List<CacheEntry>();
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private static readonly object _lock = new object();
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private static bool _initialized;
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public static void Initialize(IJitMemoryAllocator allocator)
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{
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if (_initialized) return;
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lock (_lock)
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{
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if (_initialized) return;
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_jitRegion = new ReservedRegion(allocator, CacheSize);
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_jitCacheInvalidator = new JitCacheInvalidation(allocator);
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_cacheAllocator = new CacheMemoryAllocator(CacheSize);
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if (OperatingSystem.IsWindows())
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{
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JitUnwindWindows.InstallFunctionTableHandler(_jitRegion.Pointer, CacheSize, _jitRegion.Pointer + Allocate(PageSize));
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}
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_initialized = true;
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}
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}
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public static IntPtr Map(CompiledFunction func)
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{
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byte[] code = func.Code;
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lock (_lock)
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{
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Debug.Assert(_initialized);
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int funcOffset = Allocate(code.Length);
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IntPtr funcPtr = _jitRegion.Pointer + funcOffset;
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if (OperatingSystem.IsMacOS() && RuntimeInformation.ProcessArchitecture == Architecture.Arm64)
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{
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unsafe
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{
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fixed (byte *codePtr = code)
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{
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JitSupportDarwin.Copy(funcPtr, (IntPtr)codePtr, (ulong)code.Length);
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}
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}
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}
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else
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{
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ReprotectAsWritable(funcOffset, code.Length);
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Marshal.Copy(code, 0, funcPtr, code.Length);
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ReprotectAsExecutable(funcOffset, code.Length);
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_jitCacheInvalidator.Invalidate(funcPtr, (ulong)code.Length);
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}
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Add(funcOffset, code.Length, func.UnwindInfo);
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return funcPtr;
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}
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}
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public static void Unmap(IntPtr pointer)
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{
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lock (_lock)
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{
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Debug.Assert(_initialized);
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int funcOffset = (int)(pointer.ToInt64() - _jitRegion.Pointer.ToInt64());
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bool result = TryFind(funcOffset, out CacheEntry entry);
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Debug.Assert(result);
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_cacheAllocator.Free(funcOffset, AlignCodeSize(entry.Size));
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Remove(funcOffset);
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}
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}
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private static void ReprotectAsWritable(int offset, int size)
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{
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int endOffs = offset + size;
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int regionStart = offset & ~PageMask;
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int regionEnd = (endOffs + PageMask) & ~PageMask;
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_jitRegion.Block.MapAsRwx((ulong)regionStart, (ulong)(regionEnd - regionStart));
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}
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private static void ReprotectAsExecutable(int offset, int size)
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{
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int endOffs = offset + size;
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int regionStart = offset & ~PageMask;
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int regionEnd = (endOffs + PageMask) & ~PageMask;
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_jitRegion.Block.MapAsRx((ulong)regionStart, (ulong)(regionEnd - regionStart));
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}
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private static int Allocate(int codeSize)
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{
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codeSize = AlignCodeSize(codeSize);
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int allocOffset = _cacheAllocator.Allocate(codeSize);
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if (allocOffset < 0)
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{
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throw new OutOfMemoryException("JIT Cache exhausted.");
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}
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_jitRegion.ExpandIfNeeded((ulong)allocOffset + (ulong)codeSize);
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return allocOffset;
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}
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private static int AlignCodeSize(int codeSize)
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{
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return checked(codeSize + (CodeAlignment - 1)) & ~(CodeAlignment - 1);
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}
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private static void Add(int offset, int size, UnwindInfo unwindInfo)
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{
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CacheEntry entry = new CacheEntry(offset, size, unwindInfo);
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int index = _cacheEntries.BinarySearch(entry);
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if (index < 0)
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{
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index = ~index;
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}
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_cacheEntries.Insert(index, entry);
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}
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private static void Remove(int offset)
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{
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int index = _cacheEntries.BinarySearch(new CacheEntry(offset, 0, default));
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if (index < 0)
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{
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index = ~index - 1;
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}
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if (index >= 0)
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{
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_cacheEntries.RemoveAt(index);
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}
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}
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public static bool TryFind(int offset, out CacheEntry entry)
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{
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lock (_lock)
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{
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int index = _cacheEntries.BinarySearch(new CacheEntry(offset, 0, default));
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if (index < 0)
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{
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index = ~index - 1;
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}
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if (index >= 0)
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{
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entry = _cacheEntries[index];
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return true;
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}
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}
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entry = default;
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return false;
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}
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}
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} |