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5facc0c07f
* Name all threads Close #874 * use ThreadName instead of ThreadId in Logging
254 lines
No EOL
8 KiB
C#
254 lines
No EOL
8 KiB
C#
using ARMeilleure.Decoders;
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using ARMeilleure.Diagnostics;
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using ARMeilleure.Instructions;
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using ARMeilleure.IntermediateRepresentation;
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using ARMeilleure.Memory;
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using ARMeilleure.State;
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using System;
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using System.Collections.Concurrent;
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using System.Threading;
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using static ARMeilleure.IntermediateRepresentation.OperandHelper;
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namespace ARMeilleure.Translation
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{
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public class Translator
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{
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private const ulong CallFlag = InstEmitFlowHelper.CallFlag;
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private MemoryManager _memory;
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private ConcurrentDictionary<ulong, TranslatedFunction> _funcs;
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private PriorityQueue<ulong> _backgroundQueue;
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private AutoResetEvent _backgroundTranslatorEvent;
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private volatile int _threadCount;
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public Translator(MemoryManager memory)
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{
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_memory = memory;
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_funcs = new ConcurrentDictionary<ulong, TranslatedFunction>();
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_backgroundQueue = new PriorityQueue<ulong>(2);
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_backgroundTranslatorEvent = new AutoResetEvent(false);
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}
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private void TranslateQueuedSubs()
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{
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while (_threadCount != 0)
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{
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if (_backgroundQueue.TryDequeue(out ulong address))
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{
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TranslatedFunction func = Translate(address, ExecutionMode.Aarch64, highCq: true);
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_funcs.AddOrUpdate(address, func, (key, oldFunc) => func);
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}
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else
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{
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_backgroundTranslatorEvent.WaitOne();
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}
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}
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}
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public void Execute(State.ExecutionContext context, ulong address)
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{
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if (Interlocked.Increment(ref _threadCount) == 1)
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{
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Thread backgroundTranslatorThread = new Thread(TranslateQueuedSubs)
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{
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Name = "CPU.BackgroundTranslatorThread",
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Priority = ThreadPriority.Lowest
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};
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backgroundTranslatorThread.Start();
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}
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Statistics.InitializeTimer();
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NativeInterface.RegisterThread(context, _memory);
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do
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{
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address = ExecuteSingle(context, address);
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}
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while (context.Running && (address & ~1UL) != 0);
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NativeInterface.UnregisterThread();
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if (Interlocked.Decrement(ref _threadCount) == 0)
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{
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_backgroundTranslatorEvent.Set();
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}
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}
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public ulong ExecuteSingle(State.ExecutionContext context, ulong address)
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{
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TranslatedFunction func = GetOrTranslate(address, context.ExecutionMode);
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Statistics.StartTimer();
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ulong nextAddr = func.Execute(context);
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Statistics.StopTimer(address);
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return nextAddr;
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}
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private TranslatedFunction GetOrTranslate(ulong address, ExecutionMode mode)
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{
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// TODO: Investigate how we should handle code at unaligned addresses.
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// Currently, those low bits are used to store special flags.
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bool isCallTarget = (address & CallFlag) != 0;
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address &= ~CallFlag;
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if (!_funcs.TryGetValue(address, out TranslatedFunction func))
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{
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func = Translate(address, mode, highCq: false);
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_funcs.TryAdd(address, func);
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}
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else if (isCallTarget && func.ShouldRejit())
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{
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_backgroundQueue.Enqueue(0, address);
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_backgroundTranslatorEvent.Set();
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}
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return func;
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}
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private TranslatedFunction Translate(ulong address, ExecutionMode mode, bool highCq)
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{
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ArmEmitterContext context = new ArmEmitterContext(_memory, Aarch32Mode.User);
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Logger.StartPass(PassName.Decoding);
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Block[] blocks = highCq
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? Decoder.DecodeFunction (_memory, address, mode)
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: Decoder.DecodeBasicBlock(_memory, address, mode);
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Logger.EndPass(PassName.Decoding);
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Logger.StartPass(PassName.Translation);
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EmitSynchronization(context);
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if (blocks[0].Address != address)
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{
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context.Branch(context.GetLabel(address));
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}
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ControlFlowGraph cfg = EmitAndGetCFG(context, blocks);
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Logger.EndPass(PassName.Translation);
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Logger.StartPass(PassName.RegisterUsage);
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RegisterUsage.RunPass(cfg, isCompleteFunction: false);
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Logger.EndPass(PassName.RegisterUsage);
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OperandType[] argTypes = new OperandType[] { OperandType.I64 };
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CompilerOptions options = highCq
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? CompilerOptions.HighCq
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: CompilerOptions.None;
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GuestFunction func = Compiler.Compile<GuestFunction>(cfg, argTypes, OperandType.I64, options);
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return new TranslatedFunction(func, rejit: !highCq);
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}
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private static ControlFlowGraph EmitAndGetCFG(ArmEmitterContext context, Block[] blocks)
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{
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for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
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{
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Block block = blocks[blkIndex];
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context.CurrBlock = block;
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context.MarkLabel(context.GetLabel(block.Address));
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for (int opcIndex = 0; opcIndex < block.OpCodes.Count; opcIndex++)
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{
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OpCode opCode = block.OpCodes[opcIndex];
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context.CurrOp = opCode;
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bool isLastOp = opcIndex == block.OpCodes.Count - 1;
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if (isLastOp && block.Branch != null && block.Branch.Address <= block.Address)
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{
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EmitSynchronization(context);
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}
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Operand lblPredicateSkip = null;
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if (opCode is OpCode32 op && op.Cond < Condition.Al)
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{
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lblPredicateSkip = Label();
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InstEmitFlowHelper.EmitCondBranch(context, lblPredicateSkip, op.Cond.Invert());
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}
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if (opCode.Instruction.Emitter != null)
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{
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opCode.Instruction.Emitter(context);
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}
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else
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{
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throw new InvalidOperationException($"Invalid instruction \"{opCode.Instruction.Name}\".");
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}
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if (lblPredicateSkip != null)
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{
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context.MarkLabel(lblPredicateSkip);
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// If this is the last op on the block, and there's no "next" block
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// after this one, then we have to return right now, with the address
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// of the next instruction to be executed (in the case that the condition
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// is false, and the branch was not taken, as all basic blocks should end
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// with some kind of branch).
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if (isLastOp && block.Next == null)
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{
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context.Return(Const(opCode.Address + (ulong)opCode.OpCodeSizeInBytes));
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}
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}
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}
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}
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return context.GetControlFlowGraph();
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}
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private static void EmitSynchronization(EmitterContext context)
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{
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long countOffs = NativeContext.GetCounterOffset();
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Operand countAddr = context.Add(context.LoadArgument(OperandType.I64, 0), Const(countOffs));
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Operand count = context.Load(OperandType.I32, countAddr);
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Operand lblNonZero = Label();
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Operand lblExit = Label();
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context.BranchIfTrue(lblNonZero, count);
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context.Call(new _Void(NativeInterface.CheckSynchronization));
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context.Branch(lblExit);
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context.MarkLabel(lblNonZero);
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count = context.Subtract(count, Const(1));
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context.Store(countAddr, count);
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context.MarkLabel(lblExit);
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}
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}
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} |