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ryujinx-fork/ARMeilleure/Translation/Translator.cs
FICTURE7 a9343c9364
Refactor PtcInfo (#2625)
* Refactor `PtcInfo`

This change reduces the coupling of `PtcInfo` by moving relocation
tracking to the backend. `RelocEntry`s remains as `RelocEntry`s through
out the pipeline until it actually needs to be written to the PTC
streams. Keeping this representation makes inspecting and manipulating
relocations after compilations less painful. This is something I needed
to do to patch relocations to 0 to diff dumps.

Contributes to #1125.

* Turn `Symbol` & `RelocInfo` into readonly structs

* Add documentation to `CompiledFunction`

* Remove `Compiler.Compile<T>`

Remove `Compiler.Compile<T>` and replace it by `Map<T>` of the
`CompiledFunction` returned.
2021-09-14 01:23:37 +02:00

525 lines
18 KiB
C#

using ARMeilleure.CodeGen;
using ARMeilleure.Common;
using ARMeilleure.Decoders;
using ARMeilleure.Diagnostics;
using ARMeilleure.Instructions;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.Memory;
using ARMeilleure.Signal;
using ARMeilleure.State;
using ARMeilleure.Translation.Cache;
using ARMeilleure.Translation.PTC;
using Ryujinx.Common;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading;
using static ARMeilleure.IntermediateRepresentation.Operand.Factory;
namespace ARMeilleure.Translation
{
public class Translator
{
private static readonly AddressTable<ulong>.Level[] Levels64Bit =
new AddressTable<ulong>.Level[]
{
new(31, 17),
new(23, 8),
new(15, 8),
new( 7, 8),
new( 2, 5)
};
private static readonly AddressTable<ulong>.Level[] Levels32Bit =
new AddressTable<ulong>.Level[]
{
new(31, 17),
new(23, 8),
new(15, 8),
new( 7, 8),
new( 1, 6)
};
private readonly IJitMemoryAllocator _allocator;
private readonly ConcurrentQueue<KeyValuePair<ulong, TranslatedFunction>> _oldFuncs;
private readonly ConcurrentDictionary<ulong, object> _backgroundSet;
private readonly ConcurrentStack<RejitRequest> _backgroundStack;
private readonly AutoResetEvent _backgroundTranslatorEvent;
private readonly ReaderWriterLock _backgroundTranslatorLock;
internal ConcurrentDictionary<ulong, TranslatedFunction> Functions { get; }
internal AddressTable<ulong> FunctionTable { get; }
internal EntryTable<uint> CountTable { get; }
internal TranslatorStubs Stubs { get; }
internal IMemoryManager Memory { get; }
private volatile int _threadCount;
// FIXME: Remove this once the init logic of the emulator will be redone.
public static readonly ManualResetEvent IsReadyForTranslation = new(false);
public Translator(IJitMemoryAllocator allocator, IMemoryManager memory, bool for64Bits)
{
_allocator = allocator;
Memory = memory;
_oldFuncs = new ConcurrentQueue<KeyValuePair<ulong, TranslatedFunction>>();
_backgroundSet = new ConcurrentDictionary<ulong, object>();
_backgroundStack = new ConcurrentStack<RejitRequest>();
_backgroundTranslatorEvent = new AutoResetEvent(false);
_backgroundTranslatorLock = new ReaderWriterLock();
JitCache.Initialize(allocator);
CountTable = new EntryTable<uint>();
Functions = new ConcurrentDictionary<ulong, TranslatedFunction>();
FunctionTable = new AddressTable<ulong>(for64Bits ? Levels64Bit : Levels32Bit);
Stubs = new TranslatorStubs(this);
FunctionTable.Fill = (ulong)Stubs.SlowDispatchStub;
if (memory.Type.IsHostMapped())
{
NativeSignalHandler.InitializeSignalHandler();
}
}
private void TranslateStackedSubs()
{
while (_threadCount != 0)
{
_backgroundTranslatorLock.AcquireReaderLock(Timeout.Infinite);
if (_backgroundStack.TryPop(out RejitRequest request) &&
_backgroundSet.TryRemove(request.Address, out _))
{
TranslatedFunction func = Translate(request.Address, request.Mode, highCq: true);
Functions.AddOrUpdate(request.Address, func, (key, oldFunc) =>
{
EnqueueForDeletion(key, oldFunc);
return func;
});
if (PtcProfiler.Enabled)
{
PtcProfiler.UpdateEntry(request.Address, request.Mode, highCq: true);
}
RegisterFunction(request.Address, func);
_backgroundTranslatorLock.ReleaseReaderLock();
}
else
{
_backgroundTranslatorLock.ReleaseReaderLock();
_backgroundTranslatorEvent.WaitOne();
}
}
// Wake up any other background translator threads, to encourage them to exit.
_backgroundTranslatorEvent.Set();
}
public void Execute(State.ExecutionContext context, ulong address)
{
if (Interlocked.Increment(ref _threadCount) == 1)
{
IsReadyForTranslation.WaitOne();
if (Ptc.State == PtcState.Enabled)
{
Debug.Assert(Functions.Count == 0);
Ptc.LoadTranslations(this);
Ptc.MakeAndSaveTranslations(this);
}
PtcProfiler.Start();
Ptc.Disable();
// Simple heuristic, should be user configurable in future. (1 for 4 core/ht or less, 2 for 6 core + ht
// etc). All threads are normal priority except from the last, which just fills as much of the last core
// as the os lets it with a low priority. If we only have one rejit thread, it should be normal priority
// as highCq code is performance critical.
//
// TODO: Use physical cores rather than logical. This only really makes sense for processors with
// hyperthreading. Requires OS specific code.
int unboundedThreadCount = Math.Max(1, (Environment.ProcessorCount - 6) / 3);
int threadCount = Math.Min(4, unboundedThreadCount);
for (int i = 0; i < threadCount; i++)
{
bool last = i != 0 && i == unboundedThreadCount - 1;
Thread backgroundTranslatorThread = new Thread(TranslateStackedSubs)
{
Name = "CPU.BackgroundTranslatorThread." + i,
Priority = last ? ThreadPriority.Lowest : ThreadPriority.Normal
};
backgroundTranslatorThread.Start();
}
}
Statistics.InitializeTimer();
NativeInterface.RegisterThread(context, Memory, this);
if (Optimizations.UseUnmanagedDispatchLoop)
{
Stubs.DispatchLoop(context.NativeContextPtr, address);
}
else
{
do
{
address = ExecuteSingle(context, address);
}
while (context.Running && address != 0);
}
NativeInterface.UnregisterThread();
if (Interlocked.Decrement(ref _threadCount) == 0)
{
_backgroundTranslatorEvent.Set();
ClearJitCache();
Stubs.Dispose();
FunctionTable.Dispose();
CountTable.Dispose();
}
}
public ulong ExecuteSingle(State.ExecutionContext context, ulong address)
{
TranslatedFunction func = GetOrTranslate(address, context.ExecutionMode);
Statistics.StartTimer();
ulong nextAddr = func.Execute(context);
Statistics.StopTimer(address);
return nextAddr;
}
internal TranslatedFunction GetOrTranslate(ulong address, ExecutionMode mode)
{
if (!Functions.TryGetValue(address, out TranslatedFunction func))
{
func = Translate(address, mode, highCq: false);
TranslatedFunction oldFunc = Functions.GetOrAdd(address, func);
if (oldFunc != func)
{
JitCache.Unmap(func.FuncPtr);
func = oldFunc;
}
if (PtcProfiler.Enabled)
{
PtcProfiler.AddEntry(address, mode, highCq: false);
}
RegisterFunction(address, func);
}
return func;
}
internal void RegisterFunction(ulong guestAddress, TranslatedFunction func)
{
if (FunctionTable.IsValid(guestAddress) && (Optimizations.AllowLcqInFunctionTable || func.HighCq))
{
Volatile.Write(ref FunctionTable.GetValue(guestAddress), (ulong)func.FuncPtr);
}
}
internal TranslatedFunction Translate(ulong address, ExecutionMode mode, bool highCq)
{
var context = new ArmEmitterContext(
Memory,
CountTable,
FunctionTable,
Stubs,
address,
highCq,
mode: Aarch32Mode.User);
Logger.StartPass(PassName.Decoding);
Block[] blocks = Decoder.Decode(Memory, address, mode, highCq, singleBlock: false);
Logger.EndPass(PassName.Decoding);
Logger.StartPass(PassName.Translation);
EmitSynchronization(context);
if (blocks[0].Address != address)
{
context.Branch(context.GetLabel(address));
}
ControlFlowGraph cfg = EmitAndGetCFG(context, blocks, out Range funcRange, out Counter<uint> counter);
ulong funcSize = funcRange.End - funcRange.Start;
Logger.EndPass(PassName.Translation, cfg);
Logger.StartPass(PassName.RegisterUsage);
RegisterUsage.RunPass(cfg, mode);
Logger.EndPass(PassName.RegisterUsage);
var retType = OperandType.I64;
var argTypes = new OperandType[] { OperandType.I64 };
var options = highCq ? CompilerOptions.HighCq : CompilerOptions.None;
if (context.HasPtc)
{
options |= CompilerOptions.Relocatable;
}
CompiledFunction compiledFunc = Compiler.Compile(cfg, argTypes, retType, options);
if (context.HasPtc)
{
Hash128 hash = Ptc.ComputeHash(Memory, address, funcSize);
Ptc.WriteCompiledFunction(address, funcSize, hash, highCq, compiledFunc);
}
GuestFunction func = compiledFunc.Map<GuestFunction>();
Allocators.ResetAll();
return new TranslatedFunction(func, counter, funcSize, highCq);
}
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,
out Counter<uint> counter)
{
counter = null;
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;
}
}
if (block.Address == context.EntryAddress && !context.HighCq)
{
EmitRejitCheck(context, out counter);
}
context.CurrBlock = block;
context.MarkLabel(context.GetLabel(block.Address));
if (block.Exit)
{
// Left option here as it may be useful if we need to return to managed rather than tail call in
// future. (eg. for debug)
bool useReturns = false;
InstEmitFlowHelper.EmitVirtualJump(context, Const(block.Address), isReturn: useReturns);
}
else
{
for (int opcIndex = 0; opcIndex < block.OpCodes.Count; opcIndex++)
{
OpCode opCode = block.OpCodes[opcIndex];
context.CurrOp = opCode;
bool isLastOp = opcIndex == block.OpCodes.Count - 1;
if (isLastOp && block.Branch != null && !block.Branch.Exit && block.Branch.Address <= block.Address)
{
EmitSynchronization(context);
}
Operand lblPredicateSkip = default;
if (opCode is OpCode32 op && op.Cond < Condition.Al)
{
lblPredicateSkip = Label();
InstEmitFlowHelper.EmitCondBranch(context, lblPredicateSkip, op.Cond.Invert());
}
if (opCode.Instruction.Emitter != null)
{
opCode.Instruction.Emitter(context);
}
else
{
throw new InvalidOperationException($"Invalid instruction \"{opCode.Instruction.Name}\".");
}
if (lblPredicateSkip != default)
{
context.MarkLabel(lblPredicateSkip);
}
}
}
}
range = new Range(rangeStart, rangeEnd);
return context.GetControlFlowGraph();
}
internal static void EmitRejitCheck(ArmEmitterContext context, out Counter<uint> counter)
{
const int MinsCallForRejit = 100;
counter = new Counter<uint>(context.CountTable);
Operand lblEnd = Label();
Operand address = !context.HasPtc ?
Const(ref counter.Value) :
Const(ref counter.Value, Ptc.CountTableSymbol);
Operand curCount = context.Load(OperandType.I32, address);
Operand count = context.Add(curCount, Const(1));
context.Store(address, count);
context.BranchIf(lblEnd, curCount, Const(MinsCallForRejit), Comparison.NotEqual, BasicBlockFrequency.Cold);
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.EnqueueForRejit)), Const(context.EntryAddress));
context.MarkLabel(lblEnd);
}
internal static void EmitSynchronization(EmitterContext context)
{
long countOffs = NativeContext.GetCounterOffset();
Operand lblNonZero = Label();
Operand lblExit = Label();
Operand countAddr = context.Add(context.LoadArgument(OperandType.I64, 0), Const(countOffs));
Operand count = context.Load(OperandType.I32, countAddr);
context.BranchIfTrue(lblNonZero, count, BasicBlockFrequency.Cold);
Operand running = context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.CheckSynchronization)));
context.BranchIfTrue(lblExit, running, BasicBlockFrequency.Cold);
context.Return(Const(0L));
context.MarkLabel(lblNonZero);
count = context.Subtract(count, Const(1));
context.Store(countAddr, count);
context.MarkLabel(lblExit);
}
public void InvalidateJitCacheRegion(ulong address, ulong size)
{
// If rejit is running, stop it as it may be trying to rejit a function on the invalidated region.
ClearRejitQueue(allowRequeue: true);
// TODO: Completely remove functions overlapping the specified range from the cache.
}
internal void EnqueueForRejit(ulong guestAddress, ExecutionMode mode)
{
if (_backgroundSet.TryAdd(guestAddress, null))
{
_backgroundStack.Push(new RejitRequest(guestAddress, mode));
_backgroundTranslatorEvent.Set();
}
}
private void EnqueueForDeletion(ulong guestAddress, TranslatedFunction func)
{
_oldFuncs.Enqueue(new(guestAddress, func));
}
private void ClearJitCache()
{
// Ensure no attempt will be made to compile new functions due to rejit.
ClearRejitQueue(allowRequeue: false);
foreach (var func in Functions.Values)
{
JitCache.Unmap(func.FuncPtr);
func.CallCounter?.Dispose();
}
Functions.Clear();
while (_oldFuncs.TryDequeue(out var kv))
{
JitCache.Unmap(kv.Value.FuncPtr);
kv.Value.CallCounter?.Dispose();
}
}
private void ClearRejitQueue(bool allowRequeue)
{
_backgroundTranslatorLock.AcquireWriterLock(Timeout.Infinite);
if (allowRequeue)
{
while (_backgroundStack.TryPop(out var request))
{
if (Functions.TryGetValue(request.Address, out var func) && func.CallCounter != null)
{
Volatile.Write(ref func.CallCounter.Value, 0);
}
_backgroundSet.TryRemove(request.Address, out _);
}
}
else
{
_backgroundStack.Clear();
}
_backgroundTranslatorLock.ReleaseWriterLock();
}
}
}