R/Ryujinx.HLE/HOS/Kernel/Threading/KThread.cs
riperiperi d904706fc0
Use a Jump Table for direct and indirect calls/jumps, removing transitions to managed (#975)
* Implement Jump Table for Native Calls

NOTE: this slows down rejit considerably! Not recommended to be used
without codegen optimisation or AOT.

- Does not work on Linux
- A32 needs an additional commit.

* A32 Support

(WIP)

* Actually write Direct Call pointers to the table

That would help.

* Direct Calls: Rather than returning to the translator, attempt to keep within the native stack frame.

A return to the translator can still happen, but only by exceptionally
bubbling up to it.

Also:
- Always translate lowCq as a function. Faster interop with the direct
jumps, and this will be useful in future if we want to do speculative
translation.
- Tail Call Detection: after the decoding stage, detect if we do a tail
call, and avoid translating into it. Detected if a jump is made to an
address outwith the contiguous sequence of blocks surrounding the entry
point. The goal is to reduce code touched by jit and rejit.

* A32 Support

* Use smaller max function size for lowCq, fix exceptional returns

When a return has an unexpected value and there is no code block
following this one, we now return the value rather than continuing.

* CompareAndSwap (buggy)

* Ensure CompareAndSwap does not get optimized away.

* Use CompareAndSwap to make the dynamic table thread safe.

* Tail call for linux, throw on too many arguments.

* Combine CompareAndSwap 128 and 32/64.

They emit different IR instructions since their PreAllocator behaviour
is different, but now they just have one function on EmitterContext.

* Fix issues separating from optimisations.

* Use a stub to find and execute missing functions.

This allows us to skip doing many runtime comparisons and branches, and reduces the amount of code we need to emit significantly.

For the indirect call table, this stub also does the work of moving in the highCq address to the table when one is found.

* Make Jump Tables and Jit Cache dynmically resize

Reserve virtual memory, commit as needed.

* Move TailCallRemover to its own class.

* Multithreaded Translation (based on heuristic)

A poor one, at that. Need to get core count for a better one, which
means a lot of OS specific garbage.

* Better priority management for background threads.

* Bound core limit a bit more

Past a certain point the load is not paralellizable and starts stealing from the main thread. Likely due to GC, memory, heap allocation thread contention. Reduce by one core til optimisations come to improve the situation.

* Fix memory management on linux.

* Temporary solution to some sync problems.

This will make sure threads exit correctly, most of the time. There is a potential race where setting the sync counter to 0 does nothing (counter stays at what it was before, thread could take too long to exit), but we need to find a better way to do this anyways. Synchronization frequency has been tightened as we never enter blockwise segments of code. Essentially this means, check every x functions or loop iterations, before lowcq blocks existed and were worth just as much. Ideally it should be done in a better way, since functions can be anywhere from 1 to 5000 instructions. (maybe based on host timer, or an interrupt flag from a scheduler thread)

* Address feedback minus CompareAndSwap change.

* Use default ReservedRegion granularity.

* Merge CompareAndSwap with its V128 variant.

* We already got the source, no need to do it again.

* Make sure all background translation threads exit.

* Fix CompareAndSwap128

Detection criteria was a bit scuffed.

* Address Comments.
2020-03-12 14:20:55 +11:00

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35 KiB
C#

using ARMeilleure.Memory;
using Ryujinx.Common.Logging;
using Ryujinx.HLE.HOS.Kernel.Common;
using Ryujinx.HLE.HOS.Kernel.Process;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
namespace Ryujinx.HLE.HOS.Kernel.Threading
{
class KThread : KSynchronizationObject, IKFutureSchedulerObject
{
private int _hostThreadRunning;
public Thread HostThread { get; private set; }
public ARMeilleure.State.ExecutionContext Context { get; private set; }
public long AffinityMask { get; set; }
public long ThreadUid { get; private set; }
public long TotalTimeRunning { get; set; }
public KSynchronizationObject SignaledObj { get; set; }
public ulong CondVarAddress { get; set; }
private ulong _entrypoint;
public ulong MutexAddress { get; set; }
public KProcess Owner { get; private set; }
private ulong _tlsAddress;
public ulong TlsAddress => _tlsAddress;
public ulong TlsDramAddress { get; private set; }
public long LastScheduledTime { get; set; }
public LinkedListNode<KThread>[] SiblingsPerCore { get; private set; }
public LinkedList<KThread> Withholder { get; set; }
public LinkedListNode<KThread> WithholderNode { get; set; }
public LinkedListNode<KThread> ProcessListNode { get; set; }
private LinkedList<KThread> _mutexWaiters;
private LinkedListNode<KThread> _mutexWaiterNode;
public KThread MutexOwner { get; private set; }
public int ThreadHandleForUserMutex { get; set; }
private ThreadSchedState _forcePauseFlags;
public KernelResult ObjSyncResult { get; set; }
public int DynamicPriority { get; set; }
public int CurrentCore { get; set; }
public int BasePriority { get; set; }
public int PreferredCore { get; set; }
private long _affinityMaskOverride;
private int _preferredCoreOverride;
private int _affinityOverrideCount;
public ThreadSchedState SchedFlags { get; private set; }
private int _shallBeTerminated;
public bool ShallBeTerminated { get => _shallBeTerminated != 0; set => _shallBeTerminated = value ? 1 : 0; }
public bool SyncCancelled { get; set; }
public bool WaitingSync { get; set; }
private bool _hasExited;
private bool _hasBeenInitialized;
private bool _hasBeenReleased;
public bool WaitingInArbitration { get; set; }
private KScheduler _scheduler;
private KSchedulingData _schedulingData;
public long LastPc { get; set; }
public KThread(Horizon system) : base(system)
{
_scheduler = system.Scheduler;
_schedulingData = system.Scheduler.SchedulingData;
SiblingsPerCore = new LinkedListNode<KThread>[KScheduler.CpuCoresCount];
_mutexWaiters = new LinkedList<KThread>();
}
public KernelResult Initialize(
ulong entrypoint,
ulong argsPtr,
ulong stackTop,
int priority,
int defaultCpuCore,
KProcess owner,
ThreadType type = ThreadType.User,
ThreadStart customHostThreadStart = null)
{
if ((uint)type > 3)
{
throw new ArgumentException($"Invalid thread type \"{type}\".");
}
PreferredCore = defaultCpuCore;
AffinityMask |= 1L << defaultCpuCore;
SchedFlags = type == ThreadType.Dummy
? ThreadSchedState.Running
: ThreadSchedState.None;
CurrentCore = PreferredCore;
DynamicPriority = priority;
BasePriority = priority;
ObjSyncResult = KernelResult.ThreadNotStarted;
_entrypoint = entrypoint;
if (type == ThreadType.User)
{
if (owner.AllocateThreadLocalStorage(out _tlsAddress) != KernelResult.Success)
{
return KernelResult.OutOfMemory;
}
TlsDramAddress = owner.MemoryManager.GetDramAddressFromVa(_tlsAddress);
MemoryHelper.FillWithZeros(owner.CpuMemory, (long)_tlsAddress, KTlsPageInfo.TlsEntrySize);
}
bool is64Bits;
if (owner != null)
{
Owner = owner;
owner.IncrementReferenceCount();
owner.IncrementThreadCount();
is64Bits = (owner.MmuFlags & 1) != 0;
}
else
{
is64Bits = true;
}
HostThread = new Thread(customHostThreadStart ?? (() => ThreadStart(entrypoint)));
Context = new ARMeilleure.State.ExecutionContext();
bool isAarch32 = (Owner.MmuFlags & 1) == 0;
Context.IsAarch32 = isAarch32;
Context.SetX(0, argsPtr);
if (isAarch32)
{
Context.SetX(13, (uint)stackTop);
}
else
{
Context.SetX(31, stackTop);
}
Context.CntfrqEl0 = 19200000;
Context.Tpidr = (long)_tlsAddress;
owner.SubscribeThreadEventHandlers(Context);
ThreadUid = System.GetThreadUid();
HostThread.Name = $"HLE.HostThread.{ThreadUid}";
_hasBeenInitialized = true;
if (owner != null)
{
owner.AddThread(this);
if (owner.IsPaused)
{
System.CriticalSection.Enter();
if (ShallBeTerminated || SchedFlags == ThreadSchedState.TerminationPending)
{
System.CriticalSection.Leave();
return KernelResult.Success;
}
_forcePauseFlags |= ThreadSchedState.ProcessPauseFlag;
CombineForcePauseFlags();
System.CriticalSection.Leave();
}
}
return KernelResult.Success;
}
public KernelResult Start()
{
if (!System.KernelInitialized)
{
System.CriticalSection.Enter();
if (!ShallBeTerminated && SchedFlags != ThreadSchedState.TerminationPending)
{
_forcePauseFlags |= ThreadSchedState.KernelInitPauseFlag;
CombineForcePauseFlags();
}
System.CriticalSection.Leave();
}
KernelResult result = KernelResult.ThreadTerminating;
System.CriticalSection.Enter();
if (!ShallBeTerminated)
{
KThread currentThread = System.Scheduler.GetCurrentThread();
while (SchedFlags != ThreadSchedState.TerminationPending &&
currentThread.SchedFlags != ThreadSchedState.TerminationPending &&
!currentThread.ShallBeTerminated)
{
if ((SchedFlags & ThreadSchedState.LowMask) != ThreadSchedState.None)
{
result = KernelResult.InvalidState;
break;
}
if (currentThread._forcePauseFlags == ThreadSchedState.None)
{
if (Owner != null && _forcePauseFlags != ThreadSchedState.None)
{
CombineForcePauseFlags();
}
SetNewSchedFlags(ThreadSchedState.Running);
result = KernelResult.Success;
break;
}
else
{
currentThread.CombineForcePauseFlags();
System.CriticalSection.Leave();
System.CriticalSection.Enter();
if (currentThread.ShallBeTerminated)
{
break;
}
}
}
}
System.CriticalSection.Leave();
return result;
}
public void Exit()
{
// TODO: Debug event.
if (Owner != null)
{
Owner.ResourceLimit?.Release(LimitableResource.Thread, 0, 1);
_hasBeenReleased = true;
}
System.CriticalSection.Enter();
_forcePauseFlags &= ~ThreadSchedState.ForcePauseMask;
ExitImpl();
System.CriticalSection.Leave();
DecrementReferenceCount();
}
public ThreadSchedState PrepareForTermination()
{
System.CriticalSection.Enter();
ThreadSchedState result;
if (Interlocked.CompareExchange(ref _shallBeTerminated, 1, 0) == 0)
{
if ((SchedFlags & ThreadSchedState.LowMask) == ThreadSchedState.None)
{
SchedFlags = ThreadSchedState.TerminationPending;
}
else
{
if (_forcePauseFlags != ThreadSchedState.None)
{
_forcePauseFlags &= ~ThreadSchedState.ThreadPauseFlag;
ThreadSchedState oldSchedFlags = SchedFlags;
SchedFlags &= ThreadSchedState.LowMask;
AdjustScheduling(oldSchedFlags);
}
if (BasePriority >= 0x10)
{
SetPriority(0xF);
}
if ((SchedFlags & ThreadSchedState.LowMask) == ThreadSchedState.Running)
{
// TODO: GIC distributor stuffs (sgir changes ect)
}
SignaledObj = null;
ObjSyncResult = KernelResult.ThreadTerminating;
ReleaseAndResume();
}
}
result = SchedFlags;
System.CriticalSection.Leave();
return result & ThreadSchedState.LowMask;
}
public void Terminate()
{
ThreadSchedState state = PrepareForTermination();
if (state != ThreadSchedState.TerminationPending)
{
System.Synchronization.WaitFor(new KSynchronizationObject[] { this }, -1, out _);
}
}
public void HandlePostSyscall()
{
ThreadSchedState state;
do
{
if (ShallBeTerminated || SchedFlags == ThreadSchedState.TerminationPending)
{
System.Scheduler.ExitThread(this);
Exit();
// As the death of the thread is handled by the CPU emulator, we differ from the official kernel and return here.
break;
}
System.CriticalSection.Enter();
if (ShallBeTerminated || SchedFlags == ThreadSchedState.TerminationPending)
{
state = ThreadSchedState.TerminationPending;
}
else
{
if (_forcePauseFlags != ThreadSchedState.None)
{
CombineForcePauseFlags();
}
state = ThreadSchedState.Running;
}
System.CriticalSection.Leave();
} while (state == ThreadSchedState.TerminationPending);
}
private void ExitImpl()
{
System.CriticalSection.Enter();
SetNewSchedFlags(ThreadSchedState.TerminationPending);
_hasExited = true;
Signal();
System.CriticalSection.Leave();
}
public KernelResult Sleep(long timeout)
{
System.CriticalSection.Enter();
if (ShallBeTerminated || SchedFlags == ThreadSchedState.TerminationPending)
{
System.CriticalSection.Leave();
return KernelResult.ThreadTerminating;
}
SetNewSchedFlags(ThreadSchedState.Paused);
if (timeout > 0)
{
System.TimeManager.ScheduleFutureInvocation(this, timeout);
}
System.CriticalSection.Leave();
if (timeout > 0)
{
System.TimeManager.UnscheduleFutureInvocation(this);
}
return 0;
}
public void Yield()
{
System.CriticalSection.Enter();
if (SchedFlags != ThreadSchedState.Running)
{
System.CriticalSection.Leave();
System.Scheduler.ContextSwitch();
return;
}
if (DynamicPriority < KScheduler.PrioritiesCount)
{
// Move current thread to the end of the queue.
_schedulingData.Reschedule(DynamicPriority, CurrentCore, this);
}
_scheduler.ThreadReselectionRequested = true;
System.CriticalSection.Leave();
System.Scheduler.ContextSwitch();
}
public void YieldWithLoadBalancing()
{
System.CriticalSection.Enter();
if (SchedFlags != ThreadSchedState.Running)
{
System.CriticalSection.Leave();
System.Scheduler.ContextSwitch();
return;
}
int prio = DynamicPriority;
int core = CurrentCore;
KThread nextThreadOnCurrentQueue = null;
if (DynamicPriority < KScheduler.PrioritiesCount)
{
// Move current thread to the end of the queue.
_schedulingData.Reschedule(prio, core, this);
Func<KThread, bool> predicate = x => x.DynamicPriority == prio;
nextThreadOnCurrentQueue = _schedulingData.ScheduledThreads(core).FirstOrDefault(predicate);
}
IEnumerable<KThread> SuitableCandidates()
{
foreach (KThread thread in _schedulingData.SuggestedThreads(core))
{
int srcCore = thread.CurrentCore;
if (srcCore >= 0)
{
KThread selectedSrcCore = _scheduler.CoreContexts[srcCore].SelectedThread;
if (selectedSrcCore == thread || ((selectedSrcCore?.DynamicPriority ?? 2) < 2))
{
continue;
}
}
// If the candidate was scheduled after the current thread, then it's not worth it,
// unless the priority is higher than the current one.
if (nextThreadOnCurrentQueue.LastScheduledTime >= thread.LastScheduledTime ||
nextThreadOnCurrentQueue.DynamicPriority < thread.DynamicPriority)
{
yield return thread;
}
}
}
KThread dst = SuitableCandidates().FirstOrDefault(x => x.DynamicPriority <= prio);
if (dst != null)
{
_schedulingData.TransferToCore(dst.DynamicPriority, core, dst);
_scheduler.ThreadReselectionRequested = true;
}
if (this != nextThreadOnCurrentQueue)
{
_scheduler.ThreadReselectionRequested = true;
}
System.CriticalSection.Leave();
System.Scheduler.ContextSwitch();
}
public void YieldAndWaitForLoadBalancing()
{
System.CriticalSection.Enter();
if (SchedFlags != ThreadSchedState.Running)
{
System.CriticalSection.Leave();
System.Scheduler.ContextSwitch();
return;
}
int core = CurrentCore;
_schedulingData.TransferToCore(DynamicPriority, -1, this);
KThread selectedThread = null;
if (!_schedulingData.ScheduledThreads(core).Any())
{
foreach (KThread thread in _schedulingData.SuggestedThreads(core))
{
if (thread.CurrentCore < 0)
{
continue;
}
KThread firstCandidate = _schedulingData.ScheduledThreads(thread.CurrentCore).FirstOrDefault();
if (firstCandidate == thread)
{
continue;
}
if (firstCandidate == null || firstCandidate.DynamicPriority >= 2)
{
_schedulingData.TransferToCore(thread.DynamicPriority, core, thread);
selectedThread = thread;
}
break;
}
}
if (selectedThread != this)
{
_scheduler.ThreadReselectionRequested = true;
}
System.CriticalSection.Leave();
System.Scheduler.ContextSwitch();
}
public void SetPriority(int priority)
{
System.CriticalSection.Enter();
BasePriority = priority;
UpdatePriorityInheritance();
System.CriticalSection.Leave();
}
public KernelResult SetActivity(bool pause)
{
KernelResult result = KernelResult.Success;
System.CriticalSection.Enter();
ThreadSchedState lowNibble = SchedFlags & ThreadSchedState.LowMask;
if (lowNibble != ThreadSchedState.Paused && lowNibble != ThreadSchedState.Running)
{
System.CriticalSection.Leave();
return KernelResult.InvalidState;
}
System.CriticalSection.Enter();
if (!ShallBeTerminated && SchedFlags != ThreadSchedState.TerminationPending)
{
if (pause)
{
// Pause, the force pause flag should be clear (thread is NOT paused).
if ((_forcePauseFlags & ThreadSchedState.ThreadPauseFlag) == 0)
{
_forcePauseFlags |= ThreadSchedState.ThreadPauseFlag;
CombineForcePauseFlags();
}
else
{
result = KernelResult.InvalidState;
}
}
else
{
// Unpause, the force pause flag should be set (thread is paused).
if ((_forcePauseFlags & ThreadSchedState.ThreadPauseFlag) != 0)
{
ThreadSchedState oldForcePauseFlags = _forcePauseFlags;
_forcePauseFlags &= ~ThreadSchedState.ThreadPauseFlag;
if ((oldForcePauseFlags & ~ThreadSchedState.ThreadPauseFlag) == ThreadSchedState.None)
{
ThreadSchedState oldSchedFlags = SchedFlags;
SchedFlags &= ThreadSchedState.LowMask;
AdjustScheduling(oldSchedFlags);
}
}
else
{
result = KernelResult.InvalidState;
}
}
}
System.CriticalSection.Leave();
System.CriticalSection.Leave();
return result;
}
public void CancelSynchronization()
{
System.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;
}
System.CriticalSection.Leave();
}
public KernelResult SetCoreAndAffinityMask(int newCore, long newAffinityMask)
{
System.CriticalSection.Enter();
bool useOverride = _affinityOverrideCount != 0;
// The value -3 is "do not change the preferred core".
if (newCore == -3)
{
newCore = useOverride ? _preferredCoreOverride : PreferredCore;
if ((newAffinityMask & (1 << newCore)) == 0)
{
System.CriticalSection.Leave();
return KernelResult.InvalidCombination;
}
}
if (useOverride)
{
_preferredCoreOverride = newCore;
_affinityMaskOverride = newAffinityMask;
}
else
{
long oldAffinityMask = AffinityMask;
PreferredCore = newCore;
AffinityMask = newAffinityMask;
if (oldAffinityMask != newAffinityMask)
{
int oldCore = CurrentCore;
if (CurrentCore >= 0 && ((AffinityMask >> CurrentCore) & 1) == 0)
{
if (PreferredCore < 0)
{
CurrentCore = HighestSetCore(AffinityMask);
}
else
{
CurrentCore = PreferredCore;
}
}
AdjustSchedulingForNewAffinity(oldAffinityMask, oldCore);
}
}
System.CriticalSection.Leave();
return KernelResult.Success;
}
private static int HighestSetCore(long mask)
{
for (int core = KScheduler.CpuCoresCount - 1; core >= 0; core--)
{
if (((mask >> core) & 1) != 0)
{
return core;
}
}
return -1;
}
private void CombineForcePauseFlags()
{
ThreadSchedState oldFlags = SchedFlags;
ThreadSchedState lowNibble = SchedFlags & ThreadSchedState.LowMask;
SchedFlags = lowNibble | _forcePauseFlags;
AdjustScheduling(oldFlags);
}
private void SetNewSchedFlags(ThreadSchedState newFlags)
{
System.CriticalSection.Enter();
ThreadSchedState oldFlags = SchedFlags;
SchedFlags = (oldFlags & ThreadSchedState.HighMask) | newFlags;
if ((oldFlags & ThreadSchedState.LowMask) != newFlags)
{
AdjustScheduling(oldFlags);
}
System.CriticalSection.Leave();
}
public void ReleaseAndResume()
{
System.CriticalSection.Enter();
if ((SchedFlags & ThreadSchedState.LowMask) == ThreadSchedState.Paused)
{
if (Withholder != null)
{
Withholder.Remove(WithholderNode);
SetNewSchedFlags(ThreadSchedState.Running);
Withholder = null;
}
else
{
SetNewSchedFlags(ThreadSchedState.Running);
}
}
System.CriticalSection.Leave();
}
public void Reschedule(ThreadSchedState newFlags)
{
System.CriticalSection.Enter();
ThreadSchedState oldFlags = SchedFlags;
SchedFlags = (oldFlags & ThreadSchedState.HighMask) |
(newFlags & ThreadSchedState.LowMask);
AdjustScheduling(oldFlags);
System.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 (oldFlags == ThreadSchedState.Running)
{
// Was running, now it's stopped.
if (CurrentCore >= 0)
{
_schedulingData.Unschedule(DynamicPriority, CurrentCore, this);
}
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
{
if (core != CurrentCore && ((AffinityMask >> core) & 1) != 0)
{
_schedulingData.Unsuggest(DynamicPriority, core, this);
}
}
}
else if (SchedFlags == ThreadSchedState.Running)
{
// Was stopped, now it's running.
if (CurrentCore >= 0)
{
_schedulingData.Schedule(DynamicPriority, CurrentCore, this);
}
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
{
if (core != CurrentCore && ((AffinityMask >> core) & 1) != 0)
{
_schedulingData.Suggest(DynamicPriority, core, this);
}
}
}
_scheduler.ThreadReselectionRequested = true;
}
private void AdjustSchedulingForNewPriority(int oldPriority)
{
if (SchedFlags != ThreadSchedState.Running)
{
return;
}
// Remove thread from the old priority queues.
if (CurrentCore >= 0)
{
_schedulingData.Unschedule(oldPriority, CurrentCore, this);
}
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
{
if (core != CurrentCore && ((AffinityMask >> core) & 1) != 0)
{
_schedulingData.Unsuggest(oldPriority, core, this);
}
}
// Add thread to the new priority queues.
KThread currentThread = _scheduler.GetCurrentThread();
if (CurrentCore >= 0)
{
if (currentThread == this)
{
_schedulingData.SchedulePrepend(DynamicPriority, CurrentCore, this);
}
else
{
_schedulingData.Schedule(DynamicPriority, CurrentCore, this);
}
}
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
{
if (core != CurrentCore && ((AffinityMask >> core) & 1) != 0)
{
_schedulingData.Suggest(DynamicPriority, core, this);
}
}
_scheduler.ThreadReselectionRequested = true;
}
private void AdjustSchedulingForNewAffinity(long oldAffinityMask, int oldCore)
{
if (SchedFlags != ThreadSchedState.Running || DynamicPriority >= KScheduler.PrioritiesCount)
{
return;
}
// Remove thread from the old priority queues.
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
{
if (((oldAffinityMask >> core) & 1) != 0)
{
if (core == oldCore)
{
_schedulingData.Unschedule(DynamicPriority, core, this);
}
else
{
_schedulingData.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 == CurrentCore)
{
_schedulingData.Schedule(DynamicPriority, core, this);
}
else
{
_schedulingData.Suggest(DynamicPriority, core, this);
}
}
}
_scheduler.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(Context);
}
public void PrintGuestStackTrace()
{
StringBuilder trace = new StringBuilder();
trace.AppendLine("Guest stack trace:");
trace.AppendLine(GetGuestStackTrace());
Logger.PrintInfo(LogClass.Cpu, trace.ToString());
}
public void Execute()
{
if (Interlocked.CompareExchange(ref _hostThreadRunning, 1, 0) == 0)
{
HostThread.Start();
}
}
private void ThreadStart(ulong entrypoint)
{
Owner.Translator.Execute(Context, entrypoint);
ThreadExit();
Context.Dispose();
}
private void ThreadExit()
{
System.Scheduler.ExitThread(this);
System.Scheduler.RemoveThread(this);
}
public bool IsCurrentHostThread()
{
return Thread.CurrentThread == HostThread;
}
public override bool IsSignaled()
{
return _hasExited;
}
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
{
System.ResourceLimit.Release(LimitableResource.Thread, 1, released ? 0 : 1);
}
}
}
private void FreeResources()
{
Owner?.RemoveThread(this);
if (_tlsAddress != 0 && Owner.FreeThreadLocalStorage(_tlsAddress) != KernelResult.Success)
{
throw new InvalidOperationException("Unexpected failure freeing thread local storage.");
}
System.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._preferredCoreOverride = 0;
thread.ObjSyncResult = KernelResult.InvalidState;
thread.ReleaseAndResume();
}
System.CriticalSection.Leave();
Owner?.DecrementThreadCountAndTerminateIfZero();
}
}
}