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Clear JIT cache on exit (#1518)

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* Initial cache memory allocator implementation

* Get rid of CallFlag

* Perform cache cleanup on exit

* Basic cache invalidation

* Thats not how conditionals works in C# it seems

* Set PTC version to PR number

* Address PR feedback

* Update InstEmitFlowHelper.cs

* Flag clear on address is no longer needed

* Do not include exit block in function size calculation

* Dispose jump table

* For future use

* InternalVersion = 1519 (force retest).

Co-authored-by: LDj3SNuD <35856442+LDj3SNuD@users.noreply.github.com>
This commit is contained in:
gdkchan 2020-12-16 17:07:42 -03:00 committed by GitHub
parent 11222516c4
commit 61634dd415
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
24 changed files with 827 additions and 357 deletions
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24
ARMeilleure/Common/BitMap.cs
View file

@ -4,12 +4,12 @@ using System.Numerics;
namespace ARMeilleure.Common
{
class BitMap : IEnumerator<int>
class BitMap : IEnumerator<int>, IEnumerable<int>
{
private const int IntSize = 64;
private const int IntMask = IntSize - 1;
private List<long> _masks;
private readonly List<long> _masks;
private int _enumIndex;
private long _enumMask;
@ -93,6 +93,21 @@ namespace ARMeilleure.Common
return (_masks[wordIndex] & (1L << wordBit)) != 0;
}
public int FindFirstUnset()
{
for (int index = 0; index < _masks.Count; index++)
{
long mask = _masks[index];
if (mask != -1L)
{
return BitOperations.TrailingZeroCount(~mask) + index * IntSize;
}
}
return _masks.Count * IntSize;
}
public bool Set(BitMap map)
{
EnsureCapacity(map._masks.Count * IntSize);
@ -147,6 +162,11 @@ namespace ARMeilleure.Common
}
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
public IEnumerator<int> GetEnumerator()
{
Reset();

5
ARMeilleure/Instructions/InstEmitAluHelper.cs
View file

@ -119,15 +119,12 @@ namespace ARMeilleure.Instructions
if (IsThumb(context.CurrOp))
{
bool isReturn = IsA32Return(context);
if (!isReturn)
{
context.StoreToContext();
}
Operand addr = context.BitwiseOr(value, Const(1));
InstEmitFlowHelper.EmitVirtualJump(context, addr, isReturn);
InstEmitFlowHelper.EmitVirtualJump(context, value, isReturn);
}
else
{

26
ARMeilleure/Instructions/InstEmitFlowHelper.cs
View file

@ -2,8 +2,8 @@ using ARMeilleure.Decoders;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.State;
using ARMeilleure.Translation;
using ARMeilleure.Translation.Cache;
using ARMeilleure.Translation.PTC;
using System;
using static ARMeilleure.Instructions.InstEmitHelper;
using static ARMeilleure.IntermediateRepresentation.OperandHelper;
@ -12,8 +12,6 @@ namespace ARMeilleure.Instructions
{
static class InstEmitFlowHelper
{
public const ulong CallFlag = 1;
public static void EmitCondBranch(ArmEmitterContext context, Operand target, Condition cond)
{
if (cond != Condition.Al)
@ -144,7 +142,7 @@ namespace ARMeilleure.Instructions
public static void EmitCall(ArmEmitterContext context, ulong immediate)
{
bool isRecursive = immediate == (ulong)context.BaseAddress;
bool isRecursive = immediate == context.EntryAddress;
EmitJumpTableBranch(context, Const(immediate), isRecursive);
}
@ -176,7 +174,7 @@ namespace ARMeilleure.Instructions
Operand lblContinue = context.GetLabel(nextAddr.Value);
// We need to clear out the call flag for the return address before comparing it.
context.BranchIf(lblContinue, context.BitwiseAnd(returnAddress, Const(~CallFlag)), nextAddr, Comparison.Equal, BasicBlockFrequency.Cold);
context.BranchIf(lblContinue, returnAddress, nextAddr, Comparison.Equal, BasicBlockFrequency.Cold);
context.Return(returnAddress);
}
@ -209,7 +207,7 @@ namespace ARMeilleure.Instructions
}
}
public static void EmitTailContinue(ArmEmitterContext context, Operand address, bool allowRejit = false)
public static void EmitTailContinue(ArmEmitterContext context, Operand address, bool allowRejit)
{
// Left option here as it may be useful if we need to return to managed rather than tail call in future.
// (eg. for debug)
@ -225,12 +223,9 @@ namespace ARMeilleure.Instructions
}
else
{
if (allowRejit)
{
address = context.BitwiseOr(address, Const(CallFlag));
}
Operand fallbackAddr = context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFunctionAddress)), address);
Operand fallbackAddr = context.Call(typeof(NativeInterface).GetMethod(allowRejit
? nameof(NativeInterface.GetFunctionAddress)
: nameof(NativeInterface.GetFunctionAddressWithoutRejit)), address);
EmitNativeCall(context, fallbackAddr, true);
}
@ -251,7 +246,6 @@ namespace ARMeilleure.Instructions
private static void EmitBranchFallback(ArmEmitterContext context, Operand address, bool isJump)
{
address = context.BitwiseOr(address, Const(address.Type, (long)CallFlag)); // Set call flag.
Operand fallbackAddr = context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFunctionAddress)), address);
EmitNativeCall(context, fallbackAddr, isJump);
@ -326,7 +320,7 @@ namespace ARMeilleure.Instructions
// TODO: Constant folding. Indirect calls are slower in the best case and emit more code so we want to
// avoid them when possible.
bool isConst = address.Kind == OperandKind.Constant;
long constAddr = (long)address.Value;
ulong constAddr = address.Value;
if (!context.HighCq)
{
@ -337,7 +331,7 @@ namespace ARMeilleure.Instructions
else if (!isConst)
{
// Virtual branch/call - store first used addresses on a small table for fast lookup.
int entry = context.JumpTable.ReserveDynamicEntry(isJump);
int entry = context.JumpTable.ReserveDynamicEntry(context.EntryAddress, isJump);
int jumpOffset = entry * JumpTable.JumpTableStride * JumpTable.DynamicTableElems;
@ -357,7 +351,7 @@ namespace ARMeilleure.Instructions
}
else
{
int entry = context.JumpTable.ReserveTableEntry(context.BaseAddress & (~3L), constAddr, isJump);
int entry = context.JumpTable.ReserveTableEntry(context.EntryAddress, constAddr, isJump);
int jumpOffset = entry * JumpTable.JumpTableStride + 8; // Offset directly to the host address.

2
ARMeilleure/Instructions/InstEmitHelper.cs
View file

@ -172,7 +172,7 @@ namespace ARMeilleure.Instructions
SetFlag(context, PState.TFlag, mode);
Operand addr = context.ConditionalSelect(mode, context.BitwiseOr(pc, Const((int)InstEmitFlowHelper.CallFlag)), context.BitwiseAnd(pc, Const(~3)));
Operand addr = context.ConditionalSelect(mode, pc, context.BitwiseAnd(pc, Const(~3)));
InstEmitFlowHelper.EmitVirtualJump(context, addr, isReturn);
}

24
ARMeilleure/Instructions/NativeInterface.cs
View file

@ -23,16 +23,16 @@ namespace ARMeilleure.Instructions
}
[ThreadStatic]
private static ThreadContext _context;
private static ThreadContext Context;
public static void RegisterThread(ExecutionContext context, IMemoryManager memory, Translator translator)
{
_context = new ThreadContext(context, memory, translator);
Context = new ThreadContext(context, memory, translator);
}
public static void UnregisterThread()
{
_context = null;
Context = null;
}
public static void Break(ulong address, int imm)
@ -231,14 +231,24 @@ namespace ARMeilleure.Instructions
public static ulong GetFunctionAddress(ulong address)
{
TranslatedFunction function = _context.Translator.GetOrTranslate(address, GetContext().ExecutionMode);
return GetFunctionAddressWithHint(address, true);
}
public static ulong GetFunctionAddressWithoutRejit(ulong address)
{
return GetFunctionAddressWithHint(address, false);
}
private static ulong GetFunctionAddressWithHint(ulong address, bool hintRejit)
{
TranslatedFunction function = Context.Translator.GetOrTranslate(address, GetContext().ExecutionMode, hintRejit);
return (ulong)function.FuncPtr.ToInt64();
}
public static ulong GetIndirectFunctionAddress(ulong address, ulong entryAddress)
{
TranslatedFunction function = _context.Translator.GetOrTranslate(address, GetContext().ExecutionMode);
TranslatedFunction function = Context.Translator.GetOrTranslate(address, GetContext().ExecutionMode, hintRejit: true);
ulong ptr = (ulong)function.FuncPtr.ToInt64();
@ -266,12 +276,12 @@ namespace ARMeilleure.Instructions
public static ExecutionContext GetContext()
{
return _context.Context;
return Context.Context;
}
public static IMemoryManager GetMemoryManager()
{
return _context.Memory;
return Context.Memory;
}
}
}

5
ARMeilleure/Memory/ReservedRegion.cs
View file

@ -49,5 +49,10 @@ namespace ARMeilleure.Memory
}
}
}
public void Dispose()
{
Block.Dispose();
}
}
}

11
ARMeilleure/Translation/ArmEmitterContext.cs
View file

@ -3,6 +3,7 @@ using ARMeilleure.Instructions;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.Memory;
using ARMeilleure.State;
using ARMeilleure.Translation.Cache;
using System.Collections.Generic;
using static ARMeilleure.IntermediateRepresentation.OperandHelper;
@ -39,19 +40,17 @@ namespace ARMeilleure.Translation
public IMemoryManager Memory { get; }
public Aarch32Mode Mode { get; }
public JumpTable JumpTable { get; }
public long BaseAddress { get; }
public ulong EntryAddress { get; }
public bool HighCq { get; }
public Aarch32Mode Mode { get; }
public ArmEmitterContext(IMemoryManager memory, JumpTable jumpTable, long baseAddress, bool highCq, Aarch32Mode mode)
public ArmEmitterContext(IMemoryManager memory, JumpTable jumpTable, ulong entryAddress, bool highCq, Aarch32Mode mode)
{
Memory = memory;
JumpTable = jumpTable;
BaseAddress = baseAddress;
EntryAddress = entryAddress;
HighCq = highCq;
Mode = mode;

26
ARMeilleure/Translation/Cache/CacheEntry.cs Normal file
View file

@ -0,0 +1,26 @@
using ARMeilleure.CodeGen.Unwinding;
using System;
using System.Diagnostics.CodeAnalysis;
namespace ARMeilleure.Translation.Cache
{
struct CacheEntry : IComparable<CacheEntry>
{
public int Offset { get; }
public int Size { get; }
public UnwindInfo UnwindInfo { get; }
public CacheEntry(int offset, int size, UnwindInfo unwindInfo)
{
Offset = offset;
Size = size;
UnwindInfo = unwindInfo;
}
public int CompareTo([AllowNull] CacheEntry other)
{
return Offset.CompareTo(other.Offset);
}
}
}

96
ARMeilleure/Translation/Cache/CacheMemoryAllocator.cs Normal file
View file

@ -0,0 +1,96 @@
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
namespace ARMeilleure.Translation.Cache
{
class CacheMemoryAllocator
{
private struct MemoryBlock : IComparable<MemoryBlock>
{
public int Offset { get; }
public int Size { get; }
public MemoryBlock(int offset, int size)
{
Offset = offset;
Size = size;
}
public int CompareTo([AllowNull] MemoryBlock other)
{
return Offset.CompareTo(other.Offset);
}
}
private readonly List<MemoryBlock> _blocks = new List<MemoryBlock>();
public CacheMemoryAllocator(int capacity)
{
_blocks.Add(new MemoryBlock(0, capacity));
}
public int Allocate(int size)
{
for (int i = 0; i < _blocks.Count; i++)
{
MemoryBlock block = _blocks[i];
if (block.Size > size)
{
_blocks[i] = new MemoryBlock(block.Offset + size, block.Size - size);
return block.Offset;
}
else if (block.Size == size)
{
_blocks.RemoveAt(i);
return block.Offset;
}
}
// We don't have enough free memory to perform the allocation.
return -1;
}
public void Free(int offset, int size)
{
Insert(new MemoryBlock(offset, size));
}
private void Insert(MemoryBlock block)
{
int index = _blocks.BinarySearch(block);
if (index < 0)
{
index = ~index;
}
if (index < _blocks.Count)
{
MemoryBlock next = _blocks[index];
int endOffs = block.Offset + block.Size;
if (next.Offset == endOffs)
{
block = new MemoryBlock(block.Offset, block.Size + next.Size);
_blocks.RemoveAt(index);
}
}
if (index > 0)
{
MemoryBlock prev = _blocks[index - 1];
if (prev.Offset + prev.Size == block.Offset)
{
block = new MemoryBlock(block.Offset - prev.Size, block.Size + prev.Size);
_blocks.RemoveAt(--index);
}
}
_blocks.Insert(index, block);
}
}
}

182
ARMeilleure/Translation/Cache/JitCache.cs Normal file
View file

@ -0,0 +1,182 @@
using ARMeilleure.CodeGen;
using ARMeilleure.CodeGen.Unwinding;
using ARMeilleure.Memory;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace ARMeilleure.Translation.Cache
{
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 CacheMemoryAllocator _cacheAllocator;
private static readonly List<CacheEntry> _cacheEntries = new List<CacheEntry>();
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);
_cacheAllocator = new CacheMemoryAllocator(CacheSize);
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
JitUnwindWindows.InstallFunctionTableHandler(_jitRegion.Pointer, CacheSize, _jitRegion.Pointer + Allocate(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;
ReprotectAsWritable(funcOffset, code.Length);
Marshal.Copy(code, 0, funcPtr, code.Length);
ReprotectAsExecutable(funcOffset, code.Length);
Add(funcOffset, code.Length, func.UnwindInfo);
return funcPtr;
}
}
public static void Unmap(IntPtr pointer)
{
lock (_lock)
{
Debug.Assert(_initialized);
int funcOffset = (int)(pointer.ToInt64() - _jitRegion.Pointer.ToInt64());
bool result = TryFind(funcOffset, out CacheEntry entry);
Debug.Assert(result);
_cacheAllocator.Free(funcOffset, AlignCodeSize(entry.Size));
Remove(funcOffset);
}
}
private static void ReprotectAsWritable(int offset, int size)
{
int endOffs = offset + size;
int regionStart = offset & ~PageMask;
int regionEnd = (endOffs + PageMask) & ~PageMask;
_jitRegion.Block.MapAsRwx((ulong)regionStart, (ulong)(regionEnd - regionStart));
}
private static void ReprotectAsExecutable(int offset, int size)
{
int endOffs = offset + size;
int regionStart = offset & ~PageMask;
int regionEnd = (endOffs + PageMask) & ~PageMask;
_jitRegion.Block.MapAsRx((ulong)regionStart, (ulong)(regionEnd - regionStart));
}
private static int Allocate(int codeSize)
{
codeSize = AlignCodeSize(codeSize);
int allocOffset = _cacheAllocator.Allocate(codeSize);
if (allocOffset < 0)
{
throw new OutOfMemoryException("JIT Cache exhausted.");
}
_jitRegion.ExpandIfNeeded((ulong)allocOffset + (ulong)codeSize);
return allocOffset;
}
private static int AlignCodeSize(int codeSize)
{
return checked(codeSize + (CodeAlignment - 1)) & ~(CodeAlignment - 1);
}
private static void Add(int offset, int size, UnwindInfo unwindInfo)
{
CacheEntry entry = new CacheEntry(offset, size, unwindInfo);
int index = _cacheEntries.BinarySearch(entry);
if (index < 0)
{
index = ~index;
}
_cacheEntries.Insert(index, entry);
}
private static void Remove(int offset)
{
int index = _cacheEntries.BinarySearch(new CacheEntry(offset, 0, default));
if (index < 0)
{
index = ~index - 1;
}
if (index >= 0)
{
_cacheEntries.RemoveAt(index);
}
}
public static bool TryFind(int offset, out CacheEntry entry)
{
lock (_lock)
{
int index = _cacheEntries.BinarySearch(new CacheEntry(offset, 0, default));
if (index < 0)
{
index = ~index - 1;
}
if (index >= 0)
{
entry = _cacheEntries[index];
return true;
}
}
entry = default;
return false;
}
}
}

10
ARMeilleure/Translation/JitUnwindWindows.cs → ARMeilleure/Translation/Cache/JitUnwindWindows.cs
View file

@ -5,7 +5,7 @@ using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace ARMeilleure.Translation
namespace ARMeilleure.Translation.Cache
{
static class JitUnwindWindows
{
@ -59,7 +59,7 @@ namespace ARMeilleure.Translation
private unsafe static UnwindInfo* _unwindInfo;
public static void InstallFunctionTableHandler(IntPtr codeCachePointer, uint codeCacheLength)
public static void InstallFunctionTableHandler(IntPtr codeCachePointer, uint codeCacheLength, IntPtr workBufferPtr)
{
ulong codeCachePtr = (ulong)codeCachePointer.ToInt64();
@ -69,9 +69,9 @@ namespace ARMeilleure.Translation
unsafe
{
_runtimeFunction = (RuntimeFunction*)codeCachePointer;
_runtimeFunction = (RuntimeFunction*)workBufferPtr;
_unwindInfo = (UnwindInfo*)(codeCachePointer + _sizeOfRuntimeFunction);
_unwindInfo = (UnwindInfo*)(workBufferPtr + _sizeOfRuntimeFunction);
_getRuntimeFunctionCallback = new GetRuntimeFunctionCallback(FunctionTableHandler);
@ -94,7 +94,7 @@ namespace ARMeilleure.Translation
{
int offset = (int)((long)controlPc - context.ToInt64());
if (!JitCache.TryFind(offset, out JitCacheEntry funcEntry))
if (!JitCache.TryFind(offset, out CacheEntry funcEntry))
{
return null; // Not found.
}

133
ARMeilleure/Translation/JumpTable.cs → ARMeilleure/Translation/Cache/JumpTable.cs
View file

@ -1,17 +1,15 @@
using ARMeilleure.Diagnostics;
using ARMeilleure.Memory;
using ARMeilleure.Translation.PTC;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;
namespace ARMeilleure.Translation
namespace ARMeilleure.Translation.Cache
{
using PTC;
class JumpTable
class JumpTable : IDisposable
{
// The jump table is a block of (guestAddress, hostAddress) function mappings.
// Each entry corresponds to one branch in a JIT compiled function. The entries are
@ -44,28 +42,32 @@ namespace ARMeilleure.Translation
private const int DynamicTableSize = 1048576;
private const int DynamicTableByteSize = DynamicTableSize * DynamicTableStride;
private const int DynamicEntryTag = 1 << 31;
private readonly ReservedRegion _jumpRegion;
private readonly ReservedRegion _dynamicRegion;
private int _tableEnd = 0;
private int _dynTableEnd = 0;
public IntPtr JumpPointer => _jumpRegion.Pointer;
public IntPtr DynamicPointer => _dynamicRegion.Pointer;
public int TableEnd => _tableEnd;
public int DynTableEnd => _dynTableEnd;
public JumpTableEntryAllocator Table { get; }
public JumpTableEntryAllocator DynTable { get; }
public ConcurrentDictionary<ulong, TranslatedFunction> Targets { get; }
public ConcurrentDictionary<ulong, LinkedList<int>> Dependants { get; } // TODO: Attach to TranslatedFunction or a wrapper class.
public ConcurrentDictionary<ulong, List<int>> Dependants { get; } // TODO: Attach to TranslatedFunction or a wrapper class.
public ConcurrentDictionary<ulong, List<int>> Owners { get; }
public JumpTable(IJitMemoryAllocator allocator)
{
_jumpRegion = new ReservedRegion(allocator, JumpTableByteSize);
_dynamicRegion = new ReservedRegion(allocator, DynamicTableByteSize);
Table = new JumpTableEntryAllocator();
DynTable = new JumpTableEntryAllocator();
Targets = new ConcurrentDictionary<ulong, TranslatedFunction>();
Dependants = new ConcurrentDictionary<ulong, LinkedList<int>>();
Dependants = new ConcurrentDictionary<ulong, List<int>>();
Owners = new ConcurrentDictionary<ulong, List<int>>();
Symbols.Add((ulong)_jumpRegion.Pointer.ToInt64(), JumpTableByteSize, JumpTableStride, "JMP_TABLE");
Symbols.Add((ulong)_dynamicRegion.Pointer.ToInt64(), DynamicTableByteSize, DynamicTableStride, "DYN_TABLE");
@ -73,9 +75,6 @@ namespace ARMeilleure.Translation
public void Initialize(PtcJumpTable ptcJumpTable, ConcurrentDictionary<ulong, TranslatedFunction> funcs)
{
_tableEnd = ptcJumpTable.TableEnd;
_dynTableEnd = ptcJumpTable.DynTableEnd;
foreach (ulong guestAddress in ptcJumpTable.Targets)
{
if (funcs.TryGetValue(guestAddress, out TranslatedFunction func))
@ -90,18 +89,22 @@ namespace ARMeilleure.Translation
foreach (var item in ptcJumpTable.Dependants)
{
Dependants.TryAdd(item.Key, new LinkedList<int>(item.Value));
Dependants.TryAdd(item.Key, new List<int>(item.Value));
}
foreach (var item in ptcJumpTable.Owners)
{
Owners.TryAdd(item.Key, new List<int>(item.Value));
}
}
public void RegisterFunction(ulong address, TranslatedFunction func)
{
address &= ~3UL;
Targets.AddOrUpdate(address, func, (key, oldFunc) => func);
long funcPtr = func.FuncPtr.ToInt64();
// Update all jump table entries that target this address.
if (Dependants.TryGetValue(address, out LinkedList<int> myDependants))
if (Dependants.TryGetValue(address, out List<int> myDependants))
{
lock (myDependants)
{
@ -115,41 +118,55 @@ namespace ARMeilleure.Translation
}
}
public int ReserveTableEntry(long ownerAddress, long address, bool isJump)
public int ReserveTableEntry(ulong ownerGuestAddress, ulong address, bool isJump)
{
int entry = Interlocked.Increment(ref _tableEnd);
int entry = Table.AllocateEntry();
ExpandIfNeededJumpTable(entry);
// Is the address we have already registered? If so, put the function address in the jump table.
// If not, it will point to the direct call stub.
long value = DirectCallStubs.DirectCallStub(isJump).ToInt64();
if (Targets.TryGetValue((ulong)address, out TranslatedFunction func))
if (Targets.TryGetValue(address, out TranslatedFunction func))
{
value = func.FuncPtr.ToInt64();
}
// Make sure changes to the function at the target address update this jump table entry.
LinkedList<int> targetDependants = Dependants.GetOrAdd((ulong)address, (addr) => new LinkedList<int>());
List<int> targetDependants = Dependants.GetOrAdd(address, (addr) => new List<int>());
lock (targetDependants)
{
targetDependants.AddLast(entry);
targetDependants.Add(entry);
}
// Keep track of ownership for jump table entries.
List<int> ownerEntries = Owners.GetOrAdd(ownerGuestAddress, (addr) => new List<int>());
lock (ownerEntries)
{
ownerEntries.Add(entry);
}
IntPtr addr = GetEntryAddressJumpTable(entry);
Marshal.WriteInt64(addr, 0, address);
Marshal.WriteInt64(addr, 0, (long)address);
Marshal.WriteInt64(addr, 8, value);
return entry;
}
public int ReserveDynamicEntry(bool isJump)
public int ReserveDynamicEntry(ulong ownerGuestAddress, bool isJump)
{
int entry = Interlocked.Increment(ref _dynTableEnd);
int entry = DynTable.AllocateEntry();
ExpandIfNeededDynamicTable(entry);
// Keep track of ownership for jump table entries.
List<int> ownerEntries = Owners.GetOrAdd(ownerGuestAddress, (addr) => new List<int>());
lock (ownerEntries)
{
ownerEntries.Add(entry | DynamicEntryTag);
}
// Initialize all host function pointers to the indirect call stub.
IntPtr addr = GetEntryAddressDynamicTable(entry);
long stubPtr = DirectCallStubs.IndirectCallStub(isJump).ToInt64();
@ -162,13 +179,51 @@ namespace ARMeilleure.Translation
return entry;
}
public void ExpandIfNeededJumpTable(int entries)
// For future use.
public void RemoveFunctionEntries(ulong guestAddress)
{
Debug.Assert(entries > 0);
if (Owners.TryRemove(guestAddress, out List<int> list))
{
for (int i = 0; i < list.Count; i++)
{
int entry = list[i];
if (entries < JumpTableSize)
bool isDynamic = (entry & DynamicEntryTag) != 0;
entry &= ~DynamicEntryTag;
if (isDynamic)
{
_jumpRegion.ExpandIfNeeded((ulong)((entries + 1) * JumpTableStride));
IntPtr addr = GetEntryAddressDynamicTable(entry);
for (int j = 0; j < DynamicTableElems; j++)
{
Marshal.WriteInt64(addr + j * JumpTableStride, 0, 0L);
Marshal.WriteInt64(addr + j * JumpTableStride, 8, 0L);
}
DynTable.FreeEntry(entry);
}
else
{
IntPtr addr = GetEntryAddressJumpTable(entry);
Marshal.WriteInt64(addr, 0, 0L);
Marshal.WriteInt64(addr, 8, 0L);
Table.FreeEntry(entry);
}
}
}
}
public void ExpandIfNeededJumpTable(int entry)
{
Debug.Assert(entry >= 0);
if (entry < JumpTableSize)
{
_jumpRegion.ExpandIfNeeded((ulong)((entry + 1) * JumpTableStride));
}
else
{
@ -176,13 +231,13 @@ namespace ARMeilleure.Translation
}
}
public void ExpandIfNeededDynamicTable(int entries)
public void ExpandIfNeededDynamicTable(int entry)
{
Debug.Assert(entries > 0);
Debug.Assert(entry >= 0);
if (entries < DynamicTableSize)
if (entry < DynamicTableSize)
{
_dynamicRegion.ExpandIfNeeded((ulong)((entries + 1) * DynamicTableStride));
_dynamicRegion.ExpandIfNeeded((ulong)((entry + 1) * DynamicTableStride));
}
else
{
@ -192,16 +247,22 @@ namespace ARMeilleure.Translation
public IntPtr GetEntryAddressJumpTable(int entry)
{
Debug.Assert(entry >= 1 && entry <= _tableEnd);
Debug.Assert(Table.EntryIsValid(entry));
return _jumpRegion.Pointer + entry * JumpTableStride;
}
public IntPtr GetEntryAddressDynamicTable(int entry)
{
Debug.Assert(entry >= 1 && entry <= _dynTableEnd);
Debug.Assert(DynTable.EntryIsValid(entry));
return _dynamicRegion.Pointer + entry * DynamicTableStride;
}
public void Dispose()
{
_jumpRegion.Dispose();
_dynamicRegion.Dispose();
}
}
}

72
ARMeilleure/Translation/Cache/JumpTableEntryAllocator.cs Normal file
View file

@ -0,0 +1,72 @@
using ARMeilleure.Common;
using System.Collections.Generic;
using System.Diagnostics;
namespace ARMeilleure.Translation.Cache
{
class JumpTableEntryAllocator
{
private readonly BitMap _bitmap;
private int _freeHint;
public JumpTableEntryAllocator()
{
_bitmap = new BitMap();
}
public bool EntryIsValid(int entryIndex)
{
lock (_bitmap)
{
return _bitmap.IsSet(entryIndex);
}
}
public void SetEntry(int entryIndex)
{
lock (_bitmap)
{
_bitmap.Set(entryIndex);
}
}
public int AllocateEntry()
{
lock (_bitmap)
{
int entryIndex;
if (!_bitmap.IsSet(_freeHint))
{
entryIndex = _freeHint;
}
else
{
entryIndex = _bitmap.FindFirstUnset();
}
_freeHint = entryIndex + 1;
bool wasSet = _bitmap.Set(entryIndex);
Debug.Assert(wasSet);
return entryIndex;
}
}
public void FreeEntry(int entryIndex)
{
lock (_bitmap)
{
_bitmap.Clear(entryIndex);
_freeHint = entryIndex;
}
}
public IEnumerable<int> GetEntries()
{
return _bitmap;
}
}
}

4
ARMeilleure/Translation/Compiler.cs
View file

@ -2,13 +2,13 @@ using ARMeilleure.CodeGen;
using ARMeilleure.CodeGen.X86;
using ARMeilleure.Diagnostics;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.Translation.Cache;
using ARMeilleure.Translation.PTC;
using System;
using System.Runtime.InteropServices;
namespace ARMeilleure.Translation
{
using PTC;
static class Compiler
{
public static T Compile<T>(

1
ARMeilleure/Translation/Delegates.cs
View file

@ -113,6 +113,7 @@ namespace ARMeilleure.Translation
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFpscr))); // A32 only.
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFpsr)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFunctionAddress)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFunctionAddressWithoutRejit)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetIndirectFunctionAddress)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidr)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidr32))); // A32 only.

1
ARMeilleure/Translation/DirectCallStubs.cs
View file

@ -77,7 +77,6 @@ namespace ARMeilleure.Translation
Operand address = context.Load(OperandType.I64, context.Add(nativeContextPtr, Const((long)NativeContext.GetCallAddressOffset())));
address = context.BitwiseOr(address, Const(address.Type, 1)); // Set call flag.
Operand functionAddr = context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFunctionAddress)), address);
EmitCall(context, functionAddr, tailCall);

142
ARMeilleure/Translation/JitCache.cs
View file

@ -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;
}
}
}

19
ARMeilleure/Translation/JitCacheEntry.cs
View file

@ -1,19 +0,0 @@
using ARMeilleure.CodeGen.Unwinding;
namespace ARMeilleure.Translation
{
struct JitCacheEntry
{
public int Offset { get; }
public int Size { get; }
public UnwindInfo UnwindInfo { get; }
public JitCacheEntry(int offset, int size, UnwindInfo unwindInfo)
{
Offset = offset;
Size = size;
UnwindInfo = unwindInfo;
}
}
}

24
ARMeilleure/Translation/PTC/Ptc.cs
View file

@ -2,6 +2,7 @@ using ARMeilleure.CodeGen;
using ARMeilleure.CodeGen.Unwinding;
using ARMeilleure.CodeGen.X86;
using ARMeilleure.Memory;
using ARMeilleure.Translation.Cache;
using Ryujinx.Common.Configuration;
using Ryujinx.Common.Logging;
using System;
@ -21,7 +22,7 @@ namespace ARMeilleure.Translation.PTC
{
private const string HeaderMagic = "PTChd";
private const int InternalVersion = 1801; //! To be incremented manually for each change to the ARMeilleure project.
private const int InternalVersion = 1519; //! To be incremented manually for each change to the ARMeilleure project.
private const string ActualDir = "0";
private const string BackupDir = "1";
@ -433,9 +434,9 @@ namespace ARMeilleure.Translation.PTC
UnwindInfo unwindInfo = ReadUnwindInfo(unwindInfosReader);
TranslatedFunction func = FastTranslate(code, unwindInfo, infoEntry.HighCq);
TranslatedFunction func = FastTranslate(code, infoEntry.GuestSize, unwindInfo, infoEntry.HighCq);
funcs.AddOrUpdate((ulong)infoEntry.Address, func, (key, oldFunc) => func.HighCq && !oldFunc.HighCq ? func : oldFunc);
funcs.AddOrUpdate(infoEntry.Address, func, (key, oldFunc) => func.HighCq && !oldFunc.HighCq ? func : oldFunc);
}
}
@ -457,7 +458,8 @@ namespace ARMeilleure.Translation.PTC
{
InfoEntry infoEntry = new InfoEntry();
infoEntry.Address = infosReader.ReadInt64();
infoEntry.Address = infosReader.ReadUInt64();
infoEntry.GuestSize = infosReader.ReadUInt64();
infoEntry.HighCq = infosReader.ReadBoolean();
infoEntry.CodeLen = infosReader.ReadInt32();
infoEntry.RelocEntriesCount = infosReader.ReadInt32();
@ -541,7 +543,7 @@ namespace ARMeilleure.Translation.PTC
return new UnwindInfo(pushEntries, prologueSize);
}
private static TranslatedFunction FastTranslate(byte[] code, UnwindInfo unwindInfo, bool highCq)
private static TranslatedFunction FastTranslate(byte[] code, ulong guestSize, UnwindInfo unwindInfo, bool highCq)
{
CompiledFunction cFunc = new CompiledFunction(code, unwindInfo);
@ -549,7 +551,7 @@ namespace ARMeilleure.Translation.PTC
GuestFunction gFunc = Marshal.GetDelegateForFunctionPointer<GuestFunction>(codePtr);
TranslatedFunction tFunc = new TranslatedFunction(gFunc, highCq);
TranslatedFunction tFunc = new TranslatedFunction(gFunc, guestSize, highCq);
return tFunc;
}
@ -632,12 +634,13 @@ namespace ARMeilleure.Translation.PTC
Logger.Info?.Print(LogClass.Ptc, $"{funcsCount + _translateCount} of {ProfiledFuncsCount} functions to translate - {_rejitCount} functions rejited");
}
internal static void WriteInfoCodeReloc(long address, bool highCq, PtcInfo ptcInfo)
internal static void WriteInfoCodeReloc(ulong address, ulong guestSize, bool highCq, PtcInfo ptcInfo)
{
lock (_lock)
{
// WriteInfo.
_infosWriter.Write((long)address); // InfoEntry.Address
_infosWriter.Write((ulong)address); // InfoEntry.Address
_infosWriter.Write((ulong)guestSize); // InfoEntry.GuestSize
_infosWriter.Write((bool)highCq); // InfoEntry.HighCq
_infosWriter.Write((int)ptcInfo.CodeStream.Length); // InfoEntry.CodeLen
_infosWriter.Write((int)ptcInfo.RelocEntriesCount); // InfoEntry.RelocEntriesCount
@ -673,9 +676,10 @@ namespace ARMeilleure.Translation.PTC
private struct InfoEntry
{
public const int Stride = 17; // Bytes.
public const int Stride = 25; // Bytes.
public long Address;
public ulong Address;
public ulong GuestSize;
public bool HighCq;
public int CodeLen;
public int RelocEntriesCount;

122
ARMeilleure/Translation/PTC/PtcJumpTable.cs
View file

@ -1,3 +1,4 @@
using ARMeilleure.Translation.Cache;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
@ -8,25 +9,53 @@ namespace ARMeilleure.Translation.PTC
[Serializable]
class PtcJumpTable
{
private readonly List<KeyValuePair<long, DirectHostAddress>> _jumpTable;
private readonly List<KeyValuePair<long, IndirectHostAddress>> _dynamicTable;
[Serializable]
private struct TableEntry<TAddress>
{
public int EntryIndex;
public long GuestAddress;
public TAddress HostAddress;
public TableEntry(int entryIndex, long guestAddress, TAddress hostAddress)
{
EntryIndex = entryIndex;
GuestAddress = guestAddress;
HostAddress = hostAddress;
}
}
private enum DirectHostAddress
{
CallStub,
TailCallStub,
Host
}
private enum IndirectHostAddress
{
CallStub,
TailCallStub
}
private readonly List<TableEntry<DirectHostAddress>> _jumpTable;
private readonly List<TableEntry<IndirectHostAddress>> _dynamicTable;
private readonly List<ulong> _targets;
private readonly Dictionary<ulong, LinkedList<int>> _dependants;
public int TableEnd => _jumpTable.Count;
public int DynTableEnd => _dynamicTable.Count;
private readonly Dictionary<ulong, List<int>> _dependants;
private readonly Dictionary<ulong, List<int>> _owners;
public List<ulong> Targets => _targets;
public Dictionary<ulong, LinkedList<int>> Dependants => _dependants;
public Dictionary<ulong, List<int>> Dependants => _dependants;
public Dictionary<ulong, List<int>> Owners => _owners;
public PtcJumpTable()
{
_jumpTable = new List<KeyValuePair<long, DirectHostAddress>>();
_dynamicTable = new List<KeyValuePair<long, IndirectHostAddress>>();
_jumpTable = new List<TableEntry<DirectHostAddress>>();
_dynamicTable = new List<TableEntry<IndirectHostAddress>>();
_targets = new List<ulong>();
_dependants = new Dictionary<ulong, LinkedList<int>>();
_dependants = new Dictionary<ulong, List<int>>();
_owners = new Dictionary<ulong, List<int>>();
}
public void Initialize(JumpTable jumpTable)
@ -42,7 +71,14 @@ namespace ARMeilleure.Translation.PTC
foreach (var item in jumpTable.Dependants)
{
_dependants.Add(item.Key, new LinkedList<int>(item.Value));
_dependants.Add(item.Key, new List<int>(item.Value));
}
_owners.Clear();
foreach (var item in jumpTable.Owners)
{
_owners.Add(item.Key, new List<int>(item.Value));
}
}
@ -53,20 +89,17 @@ namespace ARMeilleure.Translation.PTC
_targets.Clear();
_dependants.Clear();
_owners.Clear();
}
public void WriteJumpTable(JumpTable jumpTable, ConcurrentDictionary<ulong, TranslatedFunction> funcs)
{
jumpTable.ExpandIfNeededJumpTable(TableEnd);
int entry = 0;
// Writes internal state to jump table in-memory, after PTC was loaded.
foreach (var item in _jumpTable)
{
entry += 1;
long guestAddress = item.Key;
DirectHostAddress directHostAddress = item.Value;
long guestAddress = item.GuestAddress;
DirectHostAddress directHostAddress = item.HostAddress;
long hostAddress;
@ -94,6 +127,11 @@ namespace ARMeilleure.Translation.PTC
throw new InvalidOperationException(nameof(directHostAddress));
}
int entry = item.EntryIndex;
jumpTable.Table.SetEntry(entry);
jumpTable.ExpandIfNeededJumpTable(entry);
IntPtr addr = jumpTable.GetEntryAddressJumpTable(entry);
Marshal.WriteInt64(addr, 0, guestAddress);
@ -103,21 +141,17 @@ namespace ARMeilleure.Translation.PTC
public void WriteDynamicTable(JumpTable jumpTable)
{
// Writes internal state to jump table in-memory, after PTC was loaded.
if (JumpTable.DynamicTableElems > 1)
{
throw new NotSupportedException();
}
jumpTable.ExpandIfNeededDynamicTable(DynTableEnd);
int entry = 0;
foreach (var item in _dynamicTable)
{
entry += 1;
long guestAddress = item.Key;
IndirectHostAddress indirectHostAddress = item.Value;
long guestAddress = item.GuestAddress;
IndirectHostAddress indirectHostAddress = item.HostAddress;
long hostAddress;
@ -134,6 +168,11 @@ namespace ARMeilleure.Translation.PTC
throw new InvalidOperationException(nameof(indirectHostAddress));
}
int entry = item.EntryIndex;
jumpTable.DynTable.SetEntry(entry);
jumpTable.ExpandIfNeededDynamicTable(entry);
IntPtr addr = jumpTable.GetEntryAddressDynamicTable(entry);
Marshal.WriteInt64(addr, 0, guestAddress);
@ -143,9 +182,13 @@ namespace ARMeilleure.Translation.PTC
public void ReadJumpTable(JumpTable jumpTable)
{
// Reads in-memory jump table state and store internally for PTC serialization.
_jumpTable.Clear();
for (int entry = 1; entry <= jumpTable.TableEnd; entry++)
IEnumerable<int> entries = jumpTable.Table.GetEntries();
foreach (int entry in entries)
{
IntPtr addr = jumpTable.GetEntryAddressJumpTable(entry);
@ -167,12 +210,14 @@ namespace ARMeilleure.Translation.PTC
directHostAddress = DirectHostAddress.Host;
}
_jumpTable.Add(new KeyValuePair<long, DirectHostAddress>(guestAddress, directHostAddress));
_jumpTable.Add(new TableEntry<DirectHostAddress>(entry, guestAddress, directHostAddress));
}
}
public void ReadDynamicTable(JumpTable jumpTable)
{
// Reads in-memory jump table state and store internally for PTC serialization.
if (JumpTable.DynamicTableElems > 1)
{
throw new NotSupportedException();
@ -180,7 +225,9 @@ namespace ARMeilleure.Translation.PTC
_dynamicTable.Clear();
for (int entry = 1; entry <= jumpTable.DynTableEnd; entry++)
IEnumerable<int> entries = jumpTable.DynTable.GetEntries();
foreach (int entry in entries)
{
IntPtr addr = jumpTable.GetEntryAddressDynamicTable(entry);
@ -202,21 +249,8 @@ namespace ARMeilleure.Translation.PTC
throw new InvalidOperationException($"({nameof(hostAddress)} = 0x{hostAddress:X16})");
}
_dynamicTable.Add(new KeyValuePair<long, IndirectHostAddress>(guestAddress, indirectHostAddress));
}
}
private enum DirectHostAddress
{
CallStub,
TailCallStub,
Host
}
private enum IndirectHostAddress
{
CallStub,
TailCallStub
_dynamicTable.Add(new TableEntry<IndirectHostAddress>(entry, guestAddress, indirectHostAddress));
}
}
}
}

11
ARMeilleure/Translation/TranslatedFunction.cs
View file

@ -4,23 +4,24 @@ using System.Threading;
namespace ARMeilleure.Translation
{
sealed class TranslatedFunction
class TranslatedFunction
{
private const int MinCallsForRejit = 100;
private readonly GuestFunction _func; // Ensure that this delegate will not be garbage collected.
private int _callCount = 0;
private int _callCount;
public ulong GuestSize { get; }
public bool HighCq { get; }
public IntPtr FuncPtr { get; }
public TranslatedFunction(GuestFunction func, bool highCq)
public TranslatedFunction(GuestFunction func, ulong guestSize, bool highCq)
{
_func = func;
GuestSize = guestSize;
HighCq = highCq;
FuncPtr = Marshal.GetFunctionPointerForDelegate<GuestFunction>(func);
FuncPtr = Marshal.GetFunctionPointerForDelegate(func);
}
public ulong Execute(State.ExecutionContext context)

170
ARMeilleure/Translation/Translator.cs
View file

@ -4,8 +4,13 @@ using ARMeilleure.Instructions;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.Memory;
using ARMeilleure.State;
using ARMeilleure.Translation.Cache;
using ARMeilleure.Translation.PTC;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading;
using static ARMeilleure.IntermediateRepresentation.OperandHelper;
@ -13,21 +18,19 @@ using static ARMeilleure.IntermediateRepresentation.OperationHelper;
namespace ARMeilleure.Translation
{
using PTC;
public class Translator
{
private const ulong CallFlag = InstEmitFlowHelper.CallFlag;
private readonly IJitMemoryAllocator _allocator;
private readonly IMemoryManager _memory;
private readonly ConcurrentDictionary<ulong, TranslatedFunction> _funcs;
private readonly ConcurrentQueue<KeyValuePair<ulong, IntPtr>> _oldFuncs;
private readonly ConcurrentStack<RejitRequest> _backgroundStack;
private readonly AutoResetEvent _backgroundTranslatorEvent;
private readonly ReaderWriterLock _backgroundTranslatorLock;
private readonly JumpTable _jumpTable;
private JumpTable _jumpTable;
private volatile int _threadCount;
@ -36,35 +39,36 @@ namespace ARMeilleure.Translation
public Translator(IJitMemoryAllocator allocator, IMemoryManager memory)
{
_allocator = allocator;
_memory = memory;
_funcs = new ConcurrentDictionary<ulong, TranslatedFunction>();
_oldFuncs = new ConcurrentQueue<KeyValuePair<ulong, IntPtr>>();
_backgroundStack = new ConcurrentStack<RejitRequest>();
_backgroundTranslatorEvent = new AutoResetEvent(false);
_jumpTable = new JumpTable(allocator);
_backgroundTranslatorLock = new ReaderWriterLock();
JitCache.Initialize(allocator);
DirectCallStubs.InitializeStubs();
if (Ptc.State == PtcState.Enabled)
{
Ptc.LoadTranslations(_funcs, memory.PageTablePointer, _jumpTable);
}
}
private void TranslateStackedSubs()
{
while (_threadCount != 0)
{
_backgroundTranslatorLock.AcquireReaderLock(Timeout.Infinite);
if (_backgroundStack.TryPop(out RejitRequest request))
{
TranslatedFunction func = Translate(_memory, _jumpTable, request.Address, request.Mode, highCq: true);
_funcs.AddOrUpdate(request.Address, func, (key, oldFunc) => func);
_funcs.AddOrUpdate(request.Address, func, (key, oldFunc) =>
{
EnqueueForDeletion(key, oldFunc);
return func;
});
_jumpTable.RegisterFunction(request.Address, func);
@ -72,9 +76,12 @@ namespace ARMeilleure.Translation
{
PtcProfiler.UpdateEntry(request.Address, request.Mode, highCq: true);
}
_backgroundTranslatorLock.ReleaseReaderLock();
}
else
{
_backgroundTranslatorLock.ReleaseReaderLock();
_backgroundTranslatorEvent.WaitOne();
}
}
@ -88,8 +95,12 @@ namespace ARMeilleure.Translation
{
IsReadyForTranslation.WaitOne();
Debug.Assert(_jumpTable == null);
_jumpTable = new JumpTable(_allocator);
if (Ptc.State == PtcState.Enabled)
{
Ptc.LoadTranslations(_funcs, _memory.PageTablePointer, _jumpTable);
Ptc.MakeAndSaveTranslations(_funcs, _memory, _jumpTable);
}
@ -126,13 +137,18 @@ namespace ARMeilleure.Translation
{
address = ExecuteSingle(context, address);
}
while (context.Running && (address & ~1UL) != 0);
while (context.Running && address != 0);
NativeInterface.UnregisterThread();
if (Interlocked.Decrement(ref _threadCount) == 0)
{
_backgroundTranslatorEvent.Set();
ClearJitCache();
_jumpTable.Dispose();
_jumpTable = null;
}
}
@ -149,19 +165,19 @@ namespace ARMeilleure.Translation
return nextAddr;
}
internal TranslatedFunction GetOrTranslate(ulong address, ExecutionMode mode)
internal TranslatedFunction GetOrTranslate(ulong address, ExecutionMode mode, bool hintRejit = false)
{
// TODO: Investigate how we should handle code at unaligned addresses.
// Currently, those low bits are used to store special flags.
bool isCallTarget = (address & CallFlag) != 0;
address &= ~CallFlag;
if (!_funcs.TryGetValue(address, out TranslatedFunction func))
{
func = Translate(_memory, _jumpTable, address, mode, highCq: false);
_funcs.TryAdd(address, func);
TranslatedFunction getFunc = _funcs.GetOrAdd(address, func);
if (getFunc != func)
{
JitCache.Unmap(func.FuncPtr);
func = getFunc;
}
if (PtcProfiler.Enabled)
{
@ -169,10 +185,9 @@ namespace ARMeilleure.Translation
}
}
if (isCallTarget && func.ShouldRejit())
if (hintRejit && func.ShouldRejit())
{
_backgroundStack.Push(new RejitRequest(address, mode));
_backgroundTranslatorEvent.Set();
}
@ -181,7 +196,7 @@ namespace ARMeilleure.Translation
internal static TranslatedFunction Translate(IMemoryManager memory, JumpTable jumpTable, ulong address, ExecutionMode mode, bool highCq)
{
ArmEmitterContext context = new ArmEmitterContext(memory, jumpTable, (long)address, highCq, Aarch32Mode.User);
ArmEmitterContext context = new ArmEmitterContext(memory, jumpTable, address, highCq, Aarch32Mode.User);
PrepareOperandPool(highCq);
PrepareOperationPool(highCq);
@ -201,7 +216,9 @@ namespace ARMeilleure.Translation
context.Branch(context.GetLabel(address));
}
ControlFlowGraph cfg = EmitAndGetCFG(context, blocks);
ControlFlowGraph cfg = EmitAndGetCFG(context, blocks, out Range funcRange);
ulong funcSize = funcRange.End - funcRange.Start;
Logger.EndPass(PassName.Translation);
@ -227,22 +244,50 @@ namespace ARMeilleure.Translation
{
func = Compiler.Compile<GuestFunction>(cfg, argTypes, OperandType.I64, options, ptcInfo);
Ptc.WriteInfoCodeReloc((long)address, highCq, ptcInfo);
Ptc.WriteInfoCodeReloc(address, funcSize, highCq, ptcInfo);
}
}
ResetOperandPool(highCq);
ResetOperationPool(highCq);
return new TranslatedFunction(func, highCq);
return new TranslatedFunction(func, funcSize, highCq);
}
private static ControlFlowGraph EmitAndGetCFG(ArmEmitterContext context, Block[] blocks)
private struct Range
{
public ulong Start { get; }
public ulong End { get; }
public Range(ulong start, ulong end)
{
Start = start;
End = end;
}
}
private static ControlFlowGraph EmitAndGetCFG(ArmEmitterContext context, Block[] blocks, out Range range)
{
ulong rangeStart = ulong.MaxValue;
ulong rangeEnd = 0;
for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
{
Block block = blocks[blkIndex];
if (!block.Exit)
{
if (rangeStart > block.Address)
{
rangeStart = block.Address;
}
if (rangeEnd < block.EndAddress)
{
rangeEnd = block.EndAddress;
}
}
context.CurrBlock = block;
context.MarkLabel(context.GetLabel(block.Address));
@ -292,6 +337,8 @@ namespace ARMeilleure.Translation
}
}
range = new Range(rangeStart, rangeEnd);
return context.GetControlFlowGraph();
}
@ -322,5 +369,66 @@ namespace ARMeilleure.Translation
context.MarkLabel(lblExit);
}
public void InvalidateJitCacheRegion(ulong address, ulong size)
{
static bool OverlapsWith(ulong funcAddress, ulong funcSize, ulong address, ulong size)
{
return funcAddress < address + size && address < funcAddress + funcSize;
}
// Make a copy of all overlapping functions, as we can't otherwise
// remove elements from the collection we are iterating.
// Doing that before clearing the rejit queue is fine, even
// if a function is translated after this, it would only replace
// a existing function, as rejit is only triggered on functions
// that were already executed before.
var toDelete = _funcs.Where(x => OverlapsWith(x.Key, x.Value.GuestSize, address, size)).ToArray();
if (toDelete.Length != 0)
{
// If rejit is running, stop it as it may be trying to rejit the functions we are
// supposed to remove.
ClearRejitQueue();
}
foreach (var kv in toDelete)
{
if (_funcs.TryRemove(kv.Key, out TranslatedFunction func))
{
EnqueueForDeletion(kv.Key, func);
}
}
}
private void EnqueueForDeletion(ulong guestAddress, TranslatedFunction func)
{
_oldFuncs.Enqueue(new KeyValuePair<ulong, IntPtr>(guestAddress, func.FuncPtr));
}
private void ClearJitCache()
{
// Ensure no attempt will be made to compile new functions due to rejit.
ClearRejitQueue();
foreach (var kv in _funcs)
{
JitCache.Unmap(kv.Value.FuncPtr);
}
_funcs.Clear();
while (_oldFuncs.TryDequeue(out var kv))
{
JitCache.Unmap(kv.Value);
}
}
private void ClearRejitQueue()
{
_backgroundTranslatorLock.AcquireWriterLock(Timeout.Infinite);
_backgroundStack.Clear();
_backgroundTranslatorLock.ReleaseWriterLock();
}
}
}

16
Ryujinx.Cpu/CpuContext.cs
View file

@ -10,10 +10,22 @@ namespace Ryujinx.Cpu
public CpuContext(MemoryManager memory)
{
_translator = new Translator(new JitMemoryAllocator(), memory);
memory.UnmapEvent += UnmapHandler;
}
public static ExecutionContext CreateExecutionContext() => new ExecutionContext(new JitMemoryAllocator());
private void UnmapHandler(ulong address, ulong size)
{
_translator.InvalidateJitCacheRegion(address, size);
}
public void Execute(ExecutionContext context, ulong address) => _translator.Execute(context, address);
public static ExecutionContext CreateExecutionContext()
{
return new ExecutionContext(new JitMemoryAllocator());
}
public void Execute(ExecutionContext context, ulong address)
{
_translator.Execute(context, address);
}
}
}

10
Ryujinx.Cpu/MemoryManager.cs
View file

@ -40,6 +40,8 @@ namespace Ryujinx.Cpu
public MemoryTracking Tracking { get; }
internal event Action<ulong, ulong> UnmapEvent;
/// <summary>
/// Creates a new instance of the memory manager.
/// </summary>
@ -100,6 +102,14 @@ namespace Ryujinx.Cpu
/// <param name="size">Size of the range to be unmapped</param>
public void Unmap(ulong va, ulong size)
{
// If size is 0, there's nothing to unmap, just exit early.
if (size == 0)
{
return;
}
UnmapEvent?.Invoke(va, size);
ulong remainingSize = size;
ulong oVa = va;
while (remainingSize != 0)