mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-12-21 18:52:01 +00:00
097562bc6c
* Add missing check for thread termination on ArbitrateLock * Use TerminationRequested in all places where it can be used
1438 lines
No EOL
43 KiB
C#
1438 lines
No EOL
43 KiB
C#
using Ryujinx.Common.Logging;
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using Ryujinx.Cpu;
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using Ryujinx.HLE.HOS.Kernel.Common;
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using Ryujinx.HLE.HOS.Kernel.Process;
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using Ryujinx.HLE.HOS.Kernel.SupervisorCall;
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using Ryujinx.Horizon.Common;
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using System;
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using System.Collections.Generic;
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using System.Numerics;
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using System.Threading;
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namespace Ryujinx.HLE.HOS.Kernel.Threading
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{
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class KThread : KSynchronizationObject, IKFutureSchedulerObject
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{
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private const int TlsUserDisableCountOffset = 0x100;
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private const int TlsUserInterruptFlagOffset = 0x102;
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public const int MaxWaitSyncObjects = 64;
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private ManualResetEvent _schedulerWaitEvent;
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public ManualResetEvent SchedulerWaitEvent => _schedulerWaitEvent;
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public Thread HostThread { get; private set; }
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public IExecutionContext Context { get; private set; }
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public KThreadContext ThreadContext { get; private set; }
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public int DynamicPriority { get; set; }
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public ulong AffinityMask { get; set; }
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public ulong ThreadUid { get; private set; }
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private long _totalTimeRunning;
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public long TotalTimeRunning => _totalTimeRunning;
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public KSynchronizationObject SignaledObj { get; set; }
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public ulong CondVarAddress { get; set; }
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private ulong _entrypoint;
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private ThreadStart _customThreadStart;
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private bool _forcedUnschedulable;
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public bool IsSchedulable => _customThreadStart == null && !_forcedUnschedulable;
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public ulong MutexAddress { get; set; }
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public int KernelWaitersCount { get; private set; }
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public KProcess Owner { get; private set; }
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private ulong _tlsAddress;
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public ulong TlsAddress => _tlsAddress;
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public KSynchronizationObject[] WaitSyncObjects { get; }
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public int[] WaitSyncHandles { get; }
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public long LastScheduledTime { get; set; }
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public LinkedListNode<KThread>[] SiblingsPerCore { get; private set; }
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public LinkedList<KThread> Withholder { get; set; }
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public LinkedListNode<KThread> WithholderNode { get; set; }
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public LinkedListNode<KThread> ProcessListNode { get; set; }
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private LinkedList<KThread> _mutexWaiters;
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private LinkedListNode<KThread> _mutexWaiterNode;
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private LinkedList<KThread> _pinnedWaiters;
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public KThread MutexOwner { get; private set; }
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public int ThreadHandleForUserMutex { get; set; }
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private ThreadSchedState _forcePauseFlags;
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private ThreadSchedState _forcePausePermissionFlags;
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public Result ObjSyncResult { get; set; }
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public int BasePriority { get; set; }
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public int PreferredCore { get; set; }
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public int CurrentCore { get; set; }
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public int ActiveCore { get; set; }
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public bool IsPinned { get; private set; }
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private ulong _originalAffinityMask;
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private int _originalPreferredCore;
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private int _originalBasePriority;
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private int _coreMigrationDisableCount;
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public ThreadSchedState SchedFlags { get; private set; }
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private int _shallBeTerminated;
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private bool ShallBeTerminated => _shallBeTerminated != 0;
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public bool TerminationRequested => ShallBeTerminated || SchedFlags == ThreadSchedState.TerminationPending;
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public bool SyncCancelled { get; set; }
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public bool WaitingSync { get; set; }
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private int _hasExited;
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private bool _hasBeenInitialized;
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private bool _hasBeenReleased;
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public bool WaitingInArbitration { get; set; }
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private object _activityOperationLock;
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public KThread(KernelContext context) : base(context)
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{
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WaitSyncObjects = new KSynchronizationObject[MaxWaitSyncObjects];
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WaitSyncHandles = new int[MaxWaitSyncObjects];
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SiblingsPerCore = new LinkedListNode<KThread>[KScheduler.CpuCoresCount];
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_mutexWaiters = new LinkedList<KThread>();
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_pinnedWaiters = new LinkedList<KThread>();
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_activityOperationLock = new object();
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}
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public Result Initialize(
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ulong entrypoint,
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ulong argsPtr,
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ulong stackTop,
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int priority,
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int cpuCore,
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KProcess owner,
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ThreadType type,
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ThreadStart customThreadStart = null)
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{
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if ((uint)type > 3)
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{
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throw new ArgumentException($"Invalid thread type \"{type}\".");
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}
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PreferredCore = cpuCore;
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AffinityMask |= 1UL << cpuCore;
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SchedFlags = type == ThreadType.Dummy
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? ThreadSchedState.Running
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: ThreadSchedState.None;
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ActiveCore = cpuCore;
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ObjSyncResult = KernelResult.ThreadNotStarted;
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DynamicPriority = priority;
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BasePriority = priority;
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CurrentCore = cpuCore;
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IsPinned = false;
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_entrypoint = entrypoint;
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_customThreadStart = customThreadStart;
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if (type == ThreadType.User)
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{
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if (owner.AllocateThreadLocalStorage(out _tlsAddress) != Result.Success)
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{
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return KernelResult.OutOfMemory;
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}
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MemoryHelper.FillWithZeros(owner.CpuMemory, _tlsAddress, KTlsPageInfo.TlsEntrySize);
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}
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bool is64Bits;
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if (owner != null)
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{
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Owner = owner;
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owner.IncrementReferenceCount();
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owner.IncrementThreadCount();
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is64Bits = owner.Flags.HasFlag(ProcessCreationFlags.Is64Bit);
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}
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else
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{
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is64Bits = true;
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}
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HostThread = new Thread(ThreadStart);
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Context = owner?.CreateExecutionContext() ?? new ProcessExecutionContext();
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ThreadContext = new KThreadContext(Context);
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Context.IsAarch32 = !is64Bits;
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Context.SetX(0, argsPtr);
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if (is64Bits)
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{
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Context.SetX(18, KSystemControl.GenerateRandom() | 1);
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Context.SetX(31, stackTop);
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}
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else
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{
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Context.SetX(13, (uint)stackTop);
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}
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Context.TpidrroEl0 = (long)_tlsAddress;
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ThreadUid = KernelContext.NewThreadUid();
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HostThread.Name = customThreadStart != null ? $"HLE.OsThread.{ThreadUid}" : $"HLE.GuestThread.{ThreadUid}";
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_hasBeenInitialized = true;
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_forcePausePermissionFlags = ThreadSchedState.ForcePauseMask;
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if (owner != null)
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{
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owner.AddThread(this);
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if (owner.IsPaused)
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{
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KernelContext.CriticalSection.Enter();
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if (TerminationRequested)
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{
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KernelContext.CriticalSection.Leave();
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return Result.Success;
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}
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_forcePauseFlags |= ThreadSchedState.ProcessPauseFlag;
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CombineForcePauseFlags();
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KernelContext.CriticalSection.Leave();
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}
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}
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return Result.Success;
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}
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public Result Start()
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{
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if (!KernelContext.KernelInitialized)
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{
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KernelContext.CriticalSection.Enter();
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if (!TerminationRequested)
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{
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_forcePauseFlags |= ThreadSchedState.KernelInitPauseFlag;
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CombineForcePauseFlags();
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}
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KernelContext.CriticalSection.Leave();
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}
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Result result = KernelResult.ThreadTerminating;
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KernelContext.CriticalSection.Enter();
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if (!ShallBeTerminated)
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{
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KThread currentThread = KernelStatic.GetCurrentThread();
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while (SchedFlags != ThreadSchedState.TerminationPending && (currentThread == null || !currentThread.TerminationRequested))
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{
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if ((SchedFlags & ThreadSchedState.LowMask) != ThreadSchedState.None)
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{
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result = KernelResult.InvalidState;
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break;
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}
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if (currentThread == null || currentThread._forcePauseFlags == ThreadSchedState.None)
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{
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if (Owner != null && _forcePauseFlags != ThreadSchedState.None)
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{
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CombineForcePauseFlags();
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}
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SetNewSchedFlags(ThreadSchedState.Running);
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StartHostThread();
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result = Result.Success;
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break;
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}
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else
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{
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currentThread.CombineForcePauseFlags();
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KernelContext.CriticalSection.Leave();
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KernelContext.CriticalSection.Enter();
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if (currentThread.ShallBeTerminated)
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{
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break;
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}
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}
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}
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}
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KernelContext.CriticalSection.Leave();
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return result;
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}
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public ThreadSchedState PrepareForTermination()
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{
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KernelContext.CriticalSection.Enter();
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if (Owner != null && Owner.PinnedThreads[KernelStatic.GetCurrentThread().CurrentCore] == this)
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{
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Owner.UnpinThread(this);
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}
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ThreadSchedState result;
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if (Interlocked.Exchange(ref _shallBeTerminated, 1) == 0)
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{
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if ((SchedFlags & ThreadSchedState.LowMask) == ThreadSchedState.None)
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{
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SchedFlags = ThreadSchedState.TerminationPending;
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}
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else
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{
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if (_forcePauseFlags != ThreadSchedState.None)
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{
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_forcePauseFlags &= ~ThreadSchedState.ThreadPauseFlag;
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ThreadSchedState oldSchedFlags = SchedFlags;
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SchedFlags &= ThreadSchedState.LowMask;
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AdjustScheduling(oldSchedFlags);
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}
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if (BasePriority >= 0x10)
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{
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SetPriority(0xF);
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}
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if ((SchedFlags & ThreadSchedState.LowMask) == ThreadSchedState.Running)
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{
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// TODO: GIC distributor stuffs (sgir changes ect)
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Context.RequestInterrupt();
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}
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SignaledObj = null;
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ObjSyncResult = KernelResult.ThreadTerminating;
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ReleaseAndResume();
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}
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}
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result = SchedFlags;
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KernelContext.CriticalSection.Leave();
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return result & ThreadSchedState.LowMask;
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}
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public void Terminate()
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{
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ThreadSchedState state = PrepareForTermination();
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if (state != ThreadSchedState.TerminationPending)
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{
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KernelContext.Synchronization.WaitFor(new KSynchronizationObject[] { this }, -1, out _);
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}
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}
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public void HandlePostSyscall()
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{
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ThreadSchedState state;
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do
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{
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if (TerminationRequested)
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{
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Exit();
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// As the death of the thread is handled by the CPU emulator, we differ from the official kernel and return here.
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break;
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}
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KernelContext.CriticalSection.Enter();
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if (TerminationRequested)
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{
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state = ThreadSchedState.TerminationPending;
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}
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else
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{
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if (_forcePauseFlags != ThreadSchedState.None)
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{
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CombineForcePauseFlags();
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}
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state = ThreadSchedState.Running;
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}
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KernelContext.CriticalSection.Leave();
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} while (state == ThreadSchedState.TerminationPending);
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}
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public void Exit()
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{
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// TODO: Debug event.
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if (Owner != null)
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{
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Owner.ResourceLimit?.Release(LimitableResource.Thread, 0, 1);
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_hasBeenReleased = true;
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}
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KernelContext.CriticalSection.Enter();
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_forcePauseFlags &= ~ThreadSchedState.ForcePauseMask;
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_forcePausePermissionFlags = 0;
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bool decRef = ExitImpl();
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Context.StopRunning();
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KernelContext.CriticalSection.Leave();
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if (decRef)
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{
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DecrementReferenceCount();
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}
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}
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private bool ExitImpl()
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{
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KernelContext.CriticalSection.Enter();
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SetNewSchedFlags(ThreadSchedState.TerminationPending);
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bool decRef = Interlocked.Exchange(ref _hasExited, 1) == 0;
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Signal();
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KernelContext.CriticalSection.Leave();
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return decRef;
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}
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private int GetEffectiveRunningCore()
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{
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for (int coreNumber = 0; coreNumber < KScheduler.CpuCoresCount; coreNumber++)
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{
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if (KernelContext.Schedulers[coreNumber].CurrentThread == this)
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{
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return coreNumber;
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}
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}
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return -1;
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}
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public Result Sleep(long timeout)
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{
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KernelContext.CriticalSection.Enter();
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if (TerminationRequested)
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{
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KernelContext.CriticalSection.Leave();
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return KernelResult.ThreadTerminating;
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}
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SetNewSchedFlags(ThreadSchedState.Paused);
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if (timeout > 0)
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{
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KernelContext.TimeManager.ScheduleFutureInvocation(this, timeout);
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}
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KernelContext.CriticalSection.Leave();
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if (timeout > 0)
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{
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KernelContext.TimeManager.UnscheduleFutureInvocation(this);
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}
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return Result.Success;
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}
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public void SetPriority(int priority)
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{
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KernelContext.CriticalSection.Enter();
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if (IsPinned)
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{
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_originalBasePriority = priority;
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}
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else
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{
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BasePriority = priority;
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}
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UpdatePriorityInheritance();
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KernelContext.CriticalSection.Leave();
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}
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public void Suspend(ThreadSchedState type)
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{
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_forcePauseFlags |= type;
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CombineForcePauseFlags();
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}
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public void Resume(ThreadSchedState type)
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{
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ThreadSchedState oldForcePauseFlags = _forcePauseFlags;
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_forcePauseFlags &= ~type;
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if ((oldForcePauseFlags & ~type) == ThreadSchedState.None)
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{
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ThreadSchedState oldSchedFlags = SchedFlags;
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SchedFlags &= ThreadSchedState.LowMask;
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AdjustScheduling(oldSchedFlags);
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}
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}
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public Result SetActivity(bool pause)
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{
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lock (_activityOperationLock)
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{
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Result result = Result.Success;
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KernelContext.CriticalSection.Enter();
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ThreadSchedState lowNibble = SchedFlags & ThreadSchedState.LowMask;
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if (lowNibble != ThreadSchedState.Paused && lowNibble != ThreadSchedState.Running)
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{
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KernelContext.CriticalSection.Leave();
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return KernelResult.InvalidState;
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}
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if (!TerminationRequested)
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{
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if (pause)
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{
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// Pause, the force pause flag should be clear (thread is NOT paused).
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if ((_forcePauseFlags & ThreadSchedState.ThreadPauseFlag) == 0)
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{
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Suspend(ThreadSchedState.ThreadPauseFlag);
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}
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else
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{
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result = KernelResult.InvalidState;
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}
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}
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else
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{
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// Unpause, the force pause flag should be set (thread is paused).
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if ((_forcePauseFlags & ThreadSchedState.ThreadPauseFlag) != 0)
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{
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Resume(ThreadSchedState.ThreadPauseFlag);
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}
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else
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{
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result = KernelResult.InvalidState;
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}
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}
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}
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KernelContext.CriticalSection.Leave();
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if (result == Result.Success && pause)
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{
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bool isThreadRunning = true;
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while (isThreadRunning)
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{
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KernelContext.CriticalSection.Enter();
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if (TerminationRequested)
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{
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KernelContext.CriticalSection.Leave();
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break;
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}
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isThreadRunning = false;
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if (IsPinned)
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{
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KThread currentThread = KernelStatic.GetCurrentThread();
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if (currentThread.TerminationRequested)
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{
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KernelContext.CriticalSection.Leave();
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result = KernelResult.ThreadTerminating;
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break;
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}
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_pinnedWaiters.AddLast(currentThread);
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currentThread.Reschedule(ThreadSchedState.Paused);
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}
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else
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{
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isThreadRunning = GetEffectiveRunningCore() >= 0;
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}
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KernelContext.CriticalSection.Leave();
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}
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}
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return result;
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}
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}
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public Result GetThreadContext3(out ThreadContext context)
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{
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context = default;
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lock (_activityOperationLock)
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{
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KernelContext.CriticalSection.Enter();
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if ((_forcePauseFlags & ThreadSchedState.ThreadPauseFlag) == 0)
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{
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KernelContext.CriticalSection.Leave();
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return KernelResult.InvalidState;
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}
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|
|
if (!TerminationRequested)
|
|
{
|
|
context = GetCurrentContext();
|
|
}
|
|
|
|
KernelContext.CriticalSection.Leave();
|
|
}
|
|
|
|
return Result.Success;
|
|
}
|
|
|
|
private static uint GetPsr(IExecutionContext context)
|
|
{
|
|
return context.Pstate & 0xFF0FFE20;
|
|
}
|
|
|
|
private ThreadContext GetCurrentContext()
|
|
{
|
|
const int MaxRegistersAArch32 = 15;
|
|
const int MaxFpuRegistersAArch32 = 16;
|
|
|
|
ThreadContext context = new ThreadContext();
|
|
|
|
if (Owner.Flags.HasFlag(ProcessCreationFlags.Is64Bit))
|
|
{
|
|
for (int i = 0; i < context.Registers.Length; i++)
|
|
{
|
|
context.Registers[i] = Context.GetX(i);
|
|
}
|
|
|
|
for (int i = 0; i < context.FpuRegisters.Length; i++)
|
|
{
|
|
context.FpuRegisters[i] = Context.GetV(i);
|
|
}
|
|
|
|
context.Fp = Context.GetX(29);
|
|
context.Lr = Context.GetX(30);
|
|
context.Sp = Context.GetX(31);
|
|
context.Pc = Context.Pc;
|
|
context.Pstate = GetPsr(Context);
|
|
context.Tpidr = (ulong)Context.TpidrroEl0;
|
|
}
|
|
else
|
|
{
|
|
for (int i = 0; i < MaxRegistersAArch32; i++)
|
|
{
|
|
context.Registers[i] = (uint)Context.GetX(i);
|
|
}
|
|
|
|
for (int i = 0; i < MaxFpuRegistersAArch32; i++)
|
|
{
|
|
context.FpuRegisters[i] = Context.GetV(i);
|
|
}
|
|
|
|
context.Pc = (uint)Context.Pc;
|
|
context.Pstate = GetPsr(Context);
|
|
context.Tpidr = (uint)Context.TpidrroEl0;
|
|
}
|
|
|
|
context.Fpcr = (uint)Context.Fpcr;
|
|
context.Fpsr = (uint)Context.Fpsr;
|
|
|
|
return context;
|
|
}
|
|
|
|
public void CancelSynchronization()
|
|
{
|
|
KernelContext.CriticalSection.Enter();
|
|
|
|
if ((SchedFlags & ThreadSchedState.LowMask) != ThreadSchedState.Paused || !WaitingSync)
|
|
{
|
|
SyncCancelled = true;
|
|
}
|
|
else if (Withholder != null)
|
|
{
|
|
Withholder.Remove(WithholderNode);
|
|
|
|
SetNewSchedFlags(ThreadSchedState.Running);
|
|
|
|
Withholder = null;
|
|
|
|
SyncCancelled = true;
|
|
}
|
|
else
|
|
{
|
|
SignaledObj = null;
|
|
ObjSyncResult = KernelResult.Cancelled;
|
|
|
|
SetNewSchedFlags(ThreadSchedState.Running);
|
|
|
|
SyncCancelled = false;
|
|
}
|
|
|
|
KernelContext.CriticalSection.Leave();
|
|
}
|
|
|
|
public Result SetCoreAndAffinityMask(int newCore, ulong newAffinityMask)
|
|
{
|
|
lock (_activityOperationLock)
|
|
{
|
|
KernelContext.CriticalSection.Enter();
|
|
|
|
bool isCoreMigrationDisabled = _coreMigrationDisableCount != 0;
|
|
|
|
// The value -3 is "do not change the preferred core".
|
|
if (newCore == -3)
|
|
{
|
|
newCore = isCoreMigrationDisabled ? _originalPreferredCore : PreferredCore;
|
|
|
|
if ((newAffinityMask & (1UL << newCore)) == 0)
|
|
{
|
|
KernelContext.CriticalSection.Leave();
|
|
|
|
return KernelResult.InvalidCombination;
|
|
}
|
|
}
|
|
|
|
if (isCoreMigrationDisabled)
|
|
{
|
|
_originalPreferredCore = newCore;
|
|
_originalAffinityMask = newAffinityMask;
|
|
}
|
|
else
|
|
{
|
|
ulong oldAffinityMask = AffinityMask;
|
|
|
|
PreferredCore = newCore;
|
|
AffinityMask = newAffinityMask;
|
|
|
|
if (oldAffinityMask != newAffinityMask)
|
|
{
|
|
int oldCore = ActiveCore;
|
|
|
|
if (oldCore >= 0 && ((AffinityMask >> oldCore) & 1) == 0)
|
|
{
|
|
if (PreferredCore < 0)
|
|
{
|
|
ActiveCore = sizeof(ulong) * 8 - 1 - BitOperations.LeadingZeroCount(AffinityMask);
|
|
}
|
|
else
|
|
{
|
|
ActiveCore = PreferredCore;
|
|
}
|
|
}
|
|
|
|
AdjustSchedulingForNewAffinity(oldAffinityMask, oldCore);
|
|
}
|
|
}
|
|
|
|
KernelContext.CriticalSection.Leave();
|
|
|
|
bool targetThreadPinned = true;
|
|
|
|
while (targetThreadPinned)
|
|
{
|
|
KernelContext.CriticalSection.Enter();
|
|
|
|
if (TerminationRequested)
|
|
{
|
|
KernelContext.CriticalSection.Leave();
|
|
|
|
break;
|
|
}
|
|
|
|
targetThreadPinned = false;
|
|
|
|
int coreNumber = GetEffectiveRunningCore();
|
|
bool isPinnedThreadCurrentlyRunning = coreNumber >= 0;
|
|
|
|
if (isPinnedThreadCurrentlyRunning && ((1UL << coreNumber) & AffinityMask) == 0)
|
|
{
|
|
if (IsPinned)
|
|
{
|
|
KThread currentThread = KernelStatic.GetCurrentThread();
|
|
|
|
if (currentThread.TerminationRequested)
|
|
{
|
|
KernelContext.CriticalSection.Leave();
|
|
|
|
return KernelResult.ThreadTerminating;
|
|
}
|
|
|
|
_pinnedWaiters.AddLast(currentThread);
|
|
|
|
currentThread.Reschedule(ThreadSchedState.Paused);
|
|
}
|
|
else
|
|
{
|
|
targetThreadPinned = true;
|
|
}
|
|
}
|
|
|
|
KernelContext.CriticalSection.Leave();
|
|
}
|
|
|
|
return Result.Success;
|
|
}
|
|
}
|
|
|
|
private void CombineForcePauseFlags()
|
|
{
|
|
ThreadSchedState oldFlags = SchedFlags;
|
|
ThreadSchedState lowNibble = SchedFlags & ThreadSchedState.LowMask;
|
|
|
|
SchedFlags = lowNibble | (_forcePauseFlags & _forcePausePermissionFlags);
|
|
|
|
AdjustScheduling(oldFlags);
|
|
}
|
|
|
|
private void SetNewSchedFlags(ThreadSchedState newFlags)
|
|
{
|
|
KernelContext.CriticalSection.Enter();
|
|
|
|
ThreadSchedState oldFlags = SchedFlags;
|
|
|
|
SchedFlags = (oldFlags & ThreadSchedState.HighMask) | newFlags;
|
|
|
|
if ((oldFlags & ThreadSchedState.LowMask) != newFlags)
|
|
{
|
|
AdjustScheduling(oldFlags);
|
|
}
|
|
|
|
KernelContext.CriticalSection.Leave();
|
|
}
|
|
|
|
public void ReleaseAndResume()
|
|
{
|
|
KernelContext.CriticalSection.Enter();
|
|
|
|
if ((SchedFlags & ThreadSchedState.LowMask) == ThreadSchedState.Paused)
|
|
{
|
|
if (Withholder != null)
|
|
{
|
|
Withholder.Remove(WithholderNode);
|
|
|
|
SetNewSchedFlags(ThreadSchedState.Running);
|
|
|
|
Withholder = null;
|
|
}
|
|
else
|
|
{
|
|
SetNewSchedFlags(ThreadSchedState.Running);
|
|
}
|
|
}
|
|
|
|
KernelContext.CriticalSection.Leave();
|
|
}
|
|
|
|
public void Reschedule(ThreadSchedState newFlags)
|
|
{
|
|
KernelContext.CriticalSection.Enter();
|
|
|
|
ThreadSchedState oldFlags = SchedFlags;
|
|
|
|
SchedFlags = (oldFlags & ThreadSchedState.HighMask) |
|
|
(newFlags & ThreadSchedState.LowMask);
|
|
|
|
AdjustScheduling(oldFlags);
|
|
|
|
KernelContext.CriticalSection.Leave();
|
|
}
|
|
|
|
public void AddMutexWaiter(KThread requester)
|
|
{
|
|
AddToMutexWaitersList(requester);
|
|
|
|
requester.MutexOwner = this;
|
|
|
|
UpdatePriorityInheritance();
|
|
}
|
|
|
|
public void RemoveMutexWaiter(KThread thread)
|
|
{
|
|
if (thread._mutexWaiterNode?.List != null)
|
|
{
|
|
_mutexWaiters.Remove(thread._mutexWaiterNode);
|
|
}
|
|
|
|
thread.MutexOwner = null;
|
|
|
|
UpdatePriorityInheritance();
|
|
}
|
|
|
|
public KThread RelinquishMutex(ulong mutexAddress, out int count)
|
|
{
|
|
count = 0;
|
|
|
|
if (_mutexWaiters.First == null)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
KThread newMutexOwner = null;
|
|
|
|
LinkedListNode<KThread> currentNode = _mutexWaiters.First;
|
|
|
|
do
|
|
{
|
|
// Skip all threads that are not waiting for this mutex.
|
|
while (currentNode != null && currentNode.Value.MutexAddress != mutexAddress)
|
|
{
|
|
currentNode = currentNode.Next;
|
|
}
|
|
|
|
if (currentNode == null)
|
|
{
|
|
break;
|
|
}
|
|
|
|
LinkedListNode<KThread> nextNode = currentNode.Next;
|
|
|
|
_mutexWaiters.Remove(currentNode);
|
|
|
|
currentNode.Value.MutexOwner = newMutexOwner;
|
|
|
|
if (newMutexOwner != null)
|
|
{
|
|
// New owner was already selected, re-insert on new owner list.
|
|
newMutexOwner.AddToMutexWaitersList(currentNode.Value);
|
|
}
|
|
else
|
|
{
|
|
// New owner not selected yet, use current thread.
|
|
newMutexOwner = currentNode.Value;
|
|
}
|
|
|
|
count++;
|
|
|
|
currentNode = nextNode;
|
|
}
|
|
while (currentNode != null);
|
|
|
|
if (newMutexOwner != null)
|
|
{
|
|
UpdatePriorityInheritance();
|
|
|
|
newMutexOwner.UpdatePriorityInheritance();
|
|
}
|
|
|
|
return newMutexOwner;
|
|
}
|
|
|
|
private void UpdatePriorityInheritance()
|
|
{
|
|
// If any of the threads waiting for the mutex has
|
|
// higher priority than the current thread, then
|
|
// the current thread inherits that priority.
|
|
int highestPriority = BasePriority;
|
|
|
|
if (_mutexWaiters.First != null)
|
|
{
|
|
int waitingDynamicPriority = _mutexWaiters.First.Value.DynamicPriority;
|
|
|
|
if (waitingDynamicPriority < highestPriority)
|
|
{
|
|
highestPriority = waitingDynamicPriority;
|
|
}
|
|
}
|
|
|
|
if (highestPriority != DynamicPriority)
|
|
{
|
|
int oldPriority = DynamicPriority;
|
|
|
|
DynamicPriority = highestPriority;
|
|
|
|
AdjustSchedulingForNewPriority(oldPriority);
|
|
|
|
if (MutexOwner != null)
|
|
{
|
|
// Remove and re-insert to ensure proper sorting based on new priority.
|
|
MutexOwner._mutexWaiters.Remove(_mutexWaiterNode);
|
|
|
|
MutexOwner.AddToMutexWaitersList(this);
|
|
|
|
MutexOwner.UpdatePriorityInheritance();
|
|
}
|
|
}
|
|
}
|
|
|
|
private void AddToMutexWaitersList(KThread thread)
|
|
{
|
|
LinkedListNode<KThread> nextPrio = _mutexWaiters.First;
|
|
|
|
int currentPriority = thread.DynamicPriority;
|
|
|
|
while (nextPrio != null && nextPrio.Value.DynamicPriority <= currentPriority)
|
|
{
|
|
nextPrio = nextPrio.Next;
|
|
}
|
|
|
|
if (nextPrio != null)
|
|
{
|
|
thread._mutexWaiterNode = _mutexWaiters.AddBefore(nextPrio, thread);
|
|
}
|
|
else
|
|
{
|
|
thread._mutexWaiterNode = _mutexWaiters.AddLast(thread);
|
|
}
|
|
}
|
|
|
|
private void AdjustScheduling(ThreadSchedState oldFlags)
|
|
{
|
|
if (oldFlags == SchedFlags)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (!IsSchedulable)
|
|
{
|
|
if (!_forcedUnschedulable)
|
|
{
|
|
// Ensure our thread is running and we have an event.
|
|
StartHostThread();
|
|
|
|
// If the thread is not schedulable, we want to just run or pause
|
|
// it directly as we don't care about priority or the core it is
|
|
// running on in this case.
|
|
if (SchedFlags == ThreadSchedState.Running)
|
|
{
|
|
_schedulerWaitEvent.Set();
|
|
}
|
|
else
|
|
{
|
|
_schedulerWaitEvent.Reset();
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
if (oldFlags == ThreadSchedState.Running)
|
|
{
|
|
// Was running, now it's stopped.
|
|
if (ActiveCore >= 0)
|
|
{
|
|
KernelContext.PriorityQueue.Unschedule(DynamicPriority, ActiveCore, this);
|
|
}
|
|
|
|
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
|
|
{
|
|
if (core != ActiveCore && ((AffinityMask >> core) & 1) != 0)
|
|
{
|
|
KernelContext.PriorityQueue.Unsuggest(DynamicPriority, core, this);
|
|
}
|
|
}
|
|
}
|
|
else if (SchedFlags == ThreadSchedState.Running)
|
|
{
|
|
// Was stopped, now it's running.
|
|
if (ActiveCore >= 0)
|
|
{
|
|
KernelContext.PriorityQueue.Schedule(DynamicPriority, ActiveCore, this);
|
|
}
|
|
|
|
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
|
|
{
|
|
if (core != ActiveCore && ((AffinityMask >> core) & 1) != 0)
|
|
{
|
|
KernelContext.PriorityQueue.Suggest(DynamicPriority, core, this);
|
|
}
|
|
}
|
|
}
|
|
|
|
KernelContext.ThreadReselectionRequested = true;
|
|
}
|
|
|
|
private void AdjustSchedulingForNewPriority(int oldPriority)
|
|
{
|
|
if (SchedFlags != ThreadSchedState.Running || !IsSchedulable)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// Remove thread from the old priority queues.
|
|
if (ActiveCore >= 0)
|
|
{
|
|
KernelContext.PriorityQueue.Unschedule(oldPriority, ActiveCore, this);
|
|
}
|
|
|
|
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
|
|
{
|
|
if (core != ActiveCore && ((AffinityMask >> core) & 1) != 0)
|
|
{
|
|
KernelContext.PriorityQueue.Unsuggest(oldPriority, core, this);
|
|
}
|
|
}
|
|
|
|
// Add thread to the new priority queues.
|
|
KThread currentThread = KernelStatic.GetCurrentThread();
|
|
|
|
if (ActiveCore >= 0)
|
|
{
|
|
if (currentThread == this)
|
|
{
|
|
KernelContext.PriorityQueue.SchedulePrepend(DynamicPriority, ActiveCore, this);
|
|
}
|
|
else
|
|
{
|
|
KernelContext.PriorityQueue.Schedule(DynamicPriority, ActiveCore, this);
|
|
}
|
|
}
|
|
|
|
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
|
|
{
|
|
if (core != ActiveCore && ((AffinityMask >> core) & 1) != 0)
|
|
{
|
|
KernelContext.PriorityQueue.Suggest(DynamicPriority, core, this);
|
|
}
|
|
}
|
|
|
|
KernelContext.ThreadReselectionRequested = true;
|
|
}
|
|
|
|
private void AdjustSchedulingForNewAffinity(ulong oldAffinityMask, int oldCore)
|
|
{
|
|
if (SchedFlags != ThreadSchedState.Running || DynamicPriority >= KScheduler.PrioritiesCount || !IsSchedulable)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// Remove thread from the old priority queues.
|
|
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
|
|
{
|
|
if (((oldAffinityMask >> core) & 1) != 0)
|
|
{
|
|
if (core == oldCore)
|
|
{
|
|
KernelContext.PriorityQueue.Unschedule(DynamicPriority, core, this);
|
|
}
|
|
else
|
|
{
|
|
KernelContext.PriorityQueue.Unsuggest(DynamicPriority, core, this);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Add thread to the new priority queues.
|
|
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
|
|
{
|
|
if (((AffinityMask >> core) & 1) != 0)
|
|
{
|
|
if (core == ActiveCore)
|
|
{
|
|
KernelContext.PriorityQueue.Schedule(DynamicPriority, core, this);
|
|
}
|
|
else
|
|
{
|
|
KernelContext.PriorityQueue.Suggest(DynamicPriority, core, this);
|
|
}
|
|
}
|
|
}
|
|
|
|
KernelContext.ThreadReselectionRequested = true;
|
|
}
|
|
|
|
public void SetEntryArguments(long argsPtr, int threadHandle)
|
|
{
|
|
Context.SetX(0, (ulong)argsPtr);
|
|
Context.SetX(1, (ulong)threadHandle);
|
|
}
|
|
|
|
public void TimeUp()
|
|
{
|
|
ReleaseAndResume();
|
|
}
|
|
|
|
public string GetGuestStackTrace()
|
|
{
|
|
return Owner.Debugger.GetGuestStackTrace(this);
|
|
}
|
|
|
|
public string GetGuestRegisterPrintout()
|
|
{
|
|
return Owner.Debugger.GetCpuRegisterPrintout(this);
|
|
}
|
|
|
|
public void PrintGuestStackTrace()
|
|
{
|
|
Logger.Info?.Print(LogClass.Cpu, $"Guest stack trace:\n{GetGuestStackTrace()}\n");
|
|
}
|
|
|
|
public void PrintGuestRegisterPrintout()
|
|
{
|
|
Logger.Info?.Print(LogClass.Cpu, $"Guest CPU registers:\n{GetGuestRegisterPrintout()}\n");
|
|
}
|
|
|
|
public void AddCpuTime(long ticks)
|
|
{
|
|
Interlocked.Add(ref _totalTimeRunning, ticks);
|
|
}
|
|
|
|
public void StartHostThread()
|
|
{
|
|
if (_schedulerWaitEvent == null)
|
|
{
|
|
var schedulerWaitEvent = new ManualResetEvent(false);
|
|
|
|
if (Interlocked.Exchange(ref _schedulerWaitEvent, schedulerWaitEvent) == null)
|
|
{
|
|
HostThread.Start();
|
|
}
|
|
else
|
|
{
|
|
schedulerWaitEvent.Dispose();
|
|
}
|
|
}
|
|
}
|
|
|
|
private void ThreadStart()
|
|
{
|
|
_schedulerWaitEvent.WaitOne();
|
|
KernelStatic.SetKernelContext(KernelContext, this);
|
|
|
|
if (_customThreadStart != null)
|
|
{
|
|
_customThreadStart();
|
|
|
|
// Ensure that anything trying to join the HLE thread is unblocked.
|
|
Exit();
|
|
HandlePostSyscall();
|
|
}
|
|
else
|
|
{
|
|
Owner.Context.Execute(Context, _entrypoint);
|
|
}
|
|
|
|
Context.Dispose();
|
|
_schedulerWaitEvent.Dispose();
|
|
}
|
|
|
|
public void MakeUnschedulable()
|
|
{
|
|
_forcedUnschedulable = true;
|
|
}
|
|
|
|
public override bool IsSignaled()
|
|
{
|
|
return _hasExited != 0;
|
|
}
|
|
|
|
protected override void Destroy()
|
|
{
|
|
if (_hasBeenInitialized)
|
|
{
|
|
FreeResources();
|
|
|
|
bool released = Owner != null || _hasBeenReleased;
|
|
|
|
if (Owner != null)
|
|
{
|
|
Owner.ResourceLimit?.Release(LimitableResource.Thread, 1, released ? 0 : 1);
|
|
|
|
Owner.DecrementReferenceCount();
|
|
}
|
|
else
|
|
{
|
|
KernelContext.ResourceLimit.Release(LimitableResource.Thread, 1, released ? 0 : 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void FreeResources()
|
|
{
|
|
Owner?.RemoveThread(this);
|
|
|
|
if (_tlsAddress != 0 && Owner.FreeThreadLocalStorage(_tlsAddress) != Result.Success)
|
|
{
|
|
throw new InvalidOperationException("Unexpected failure freeing thread local storage.");
|
|
}
|
|
|
|
KernelContext.CriticalSection.Enter();
|
|
|
|
// Wake up all threads that may be waiting for a mutex being held by this thread.
|
|
foreach (KThread thread in _mutexWaiters)
|
|
{
|
|
thread.MutexOwner = null;
|
|
thread._originalPreferredCore = 0;
|
|
thread.ObjSyncResult = KernelResult.InvalidState;
|
|
|
|
thread.ReleaseAndResume();
|
|
}
|
|
|
|
KernelContext.CriticalSection.Leave();
|
|
|
|
Owner?.DecrementThreadCountAndTerminateIfZero();
|
|
}
|
|
|
|
public void Pin()
|
|
{
|
|
IsPinned = true;
|
|
_coreMigrationDisableCount++;
|
|
|
|
int activeCore = ActiveCore;
|
|
|
|
_originalPreferredCore = PreferredCore;
|
|
_originalAffinityMask = AffinityMask;
|
|
|
|
ActiveCore = CurrentCore;
|
|
PreferredCore = CurrentCore;
|
|
AffinityMask = 1UL << CurrentCore;
|
|
|
|
if (activeCore != CurrentCore || _originalAffinityMask != AffinityMask)
|
|
{
|
|
AdjustSchedulingForNewAffinity(_originalAffinityMask, activeCore);
|
|
}
|
|
|
|
_originalBasePriority = BasePriority;
|
|
BasePriority = Math.Min(_originalBasePriority, BitOperations.TrailingZeroCount(Owner.Capabilities.AllowedThreadPriosMask) - 1);
|
|
UpdatePriorityInheritance();
|
|
|
|
// Disallows thread pausing
|
|
_forcePausePermissionFlags &= ~ThreadSchedState.ThreadPauseFlag;
|
|
CombineForcePauseFlags();
|
|
|
|
// TODO: Assign reduced SVC permissions
|
|
}
|
|
|
|
public void Unpin()
|
|
{
|
|
IsPinned = false;
|
|
_coreMigrationDisableCount--;
|
|
|
|
ulong affinityMask = AffinityMask;
|
|
int activeCore = ActiveCore;
|
|
|
|
PreferredCore = _originalPreferredCore;
|
|
AffinityMask = _originalAffinityMask;
|
|
|
|
if (AffinityMask != affinityMask)
|
|
{
|
|
if ((AffinityMask & 1UL << ActiveCore) != 0)
|
|
{
|
|
if (PreferredCore >= 0)
|
|
{
|
|
ActiveCore = PreferredCore;
|
|
}
|
|
else
|
|
{
|
|
ActiveCore = sizeof(ulong) * 8 - 1 - BitOperations.LeadingZeroCount((ulong)AffinityMask);
|
|
}
|
|
|
|
AdjustSchedulingForNewAffinity(affinityMask, activeCore);
|
|
}
|
|
}
|
|
|
|
BasePriority = _originalBasePriority;
|
|
UpdatePriorityInheritance();
|
|
|
|
if (!TerminationRequested)
|
|
{
|
|
// Allows thread pausing
|
|
_forcePausePermissionFlags |= ThreadSchedState.ThreadPauseFlag;
|
|
CombineForcePauseFlags();
|
|
|
|
// TODO: Restore SVC permissions
|
|
}
|
|
|
|
// Wake up waiters
|
|
foreach (KThread waiter in _pinnedWaiters)
|
|
{
|
|
waiter.ReleaseAndResume();
|
|
}
|
|
|
|
_pinnedWaiters.Clear();
|
|
}
|
|
|
|
public void SynchronizePreemptionState()
|
|
{
|
|
KernelContext.CriticalSection.Enter();
|
|
|
|
if (Owner != null && Owner.PinnedThreads[CurrentCore] == this)
|
|
{
|
|
ClearUserInterruptFlag();
|
|
|
|
Owner.UnpinThread(this);
|
|
}
|
|
|
|
KernelContext.CriticalSection.Leave();
|
|
}
|
|
|
|
public ushort GetUserDisableCount()
|
|
{
|
|
return Owner.CpuMemory.Read<ushort>(_tlsAddress + TlsUserDisableCountOffset);
|
|
}
|
|
|
|
public void SetUserInterruptFlag()
|
|
{
|
|
Owner.CpuMemory.Write<ushort>(_tlsAddress + TlsUserInterruptFlagOffset, 1);
|
|
}
|
|
|
|
public void ClearUserInterruptFlag()
|
|
{
|
|
Owner.CpuMemory.Write<ushort>(_tlsAddress + TlsUserInterruptFlagOffset, 0);
|
|
}
|
|
}
|
|
} |