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Fix some races in SvcThreadSync and change the way how yield works

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This commit is contained in:
gdkchan 2018-05-15 22:36:08 -03:00
parent 7a8fbcf89f
commit 73a3233d57
7 changed files with 173 additions and 219 deletions
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222
Ryujinx.Core/OsHle/Handles/KProcessScheduler.cs
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@ -1,6 +1,7 @@
using Ryujinx.Core.Logging;
using System;
using System.Collections.Concurrent;
using System.Threading;
namespace Ryujinx.Core.OsHle.Handles
{
@ -10,7 +11,7 @@ namespace Ryujinx.Core.OsHle.Handles
private ThreadQueue WaitingToRun;
private int ActiveCores;
private KThread[] CoreThreads;
private object SchedLock;
@ -24,6 +25,8 @@ namespace Ryujinx.Core.OsHle.Handles
WaitingToRun = new ThreadQueue();
CoreThreads = new KThread[4];
SchedLock = new object();
}
@ -38,7 +41,7 @@ namespace Ryujinx.Core.OsHle.Handles
return;
}
if (AddActiveCore(Thread))
if (TryAddToCore(Thread))
{
Thread.Thread.Execute();
@ -74,7 +77,7 @@ namespace Ryujinx.Core.OsHle.Handles
{
Log.PrintDebug(LogClass.KernelScheduler, $"Nothing to run on core {ActualCore}!");
RemoveActiveCore(ActualCore);
CoreThreads[ActualCore] = null;
return;
}
@ -104,44 +107,38 @@ namespace Ryujinx.Core.OsHle.Handles
}
}
public void EnterWait(KThread Thread)
public void EnterWait(KThread Thread, int TimeoutMs = Timeout.Infinite)
{
if (!AllThreads.TryGetValue(Thread, out SchedulerThread SchedThread))
{
throw new InvalidOperationException();
}
SchedulerThread SchedThread = AllThreads[Thread];
Suspend(Thread);
SchedThread.WaitSync.WaitOne();
SchedThread.WaitSync.WaitOne(TimeoutMs);
TryResumingExecution(SchedThread);
}
public bool EnterWait(KThread Thread, int Timeout)
{
if (!AllThreads.TryGetValue(Thread, out SchedulerThread SchedThread))
{
throw new InvalidOperationException();
}
Suspend(Thread);
bool Result = SchedThread.WaitSync.WaitOne(Timeout);
TryResumingExecution(SchedThread);
return Result;
}
public void WakeUp(KThread Thread)
{
if (!AllThreads.TryGetValue(Thread, out SchedulerThread SchedThread))
{
throw new InvalidOperationException();
}
AllThreads[Thread].WaitSync.Set();
}
SchedThread.WaitSync.Set();
public void TryToRun(KThread Thread)
{
lock (SchedLock)
{
if (AllThreads.TryGetValue(Thread, out SchedulerThread SchedThread))
{
if (WaitingToRun.HasThread(SchedThread) && TryAddToCore(Thread))
{
RunThread(SchedThread);
}
else
{
SetReschedule(Thread.ProcessorId);
}
}
}
}
public void Suspend(KThread Thread)
@ -150,6 +147,8 @@ namespace Ryujinx.Core.OsHle.Handles
{
PrintDbgThreadInfo(Thread, "suspended.");
AllThreads[Thread].NeedsReschedule = false;
int ActualCore = Thread.ActualCore;
SchedulerThread SchedThread = WaitingToRun.Pop(ActualCore);
@ -158,84 +157,76 @@ namespace Ryujinx.Core.OsHle.Handles
{
SchedThread.Thread.ActualCore = ActualCore;
CoreThreads[ActualCore] = SchedThread.Thread;
RunThread(SchedThread);
}
else
{
Log.PrintDebug(LogClass.KernelScheduler, $"Nothing to run on core {Thread.ActualCore}!");
RemoveActiveCore(ActualCore);
CoreThreads[ActualCore] = null;
}
}
}
public void Yield(KThread Thread)
public void SetReschedule(int Core)
{
PrintDbgThreadInfo(Thread, "yielded execution.");
if (IsActive(Thread))
lock (SchedLock)
{
KThread Thread = CoreThreads[Core];
if (Thread != null && AllThreads.TryGetValue(Thread, out SchedulerThread SchedThread))
{
SchedThread.NeedsReschedule = true;
}
}
}
public void Reschedule(KThread Thread)
{
SchedulerThread SchedThread = AllThreads[Thread];
bool NeedsReschedule;
lock (SchedLock)
{
NeedsReschedule = SchedThread.NeedsReschedule;
SchedThread.NeedsReschedule = false;
}
if (NeedsReschedule)
{
PrintDbgThreadInfo(Thread, "yielded execution.");
lock (SchedLock)
{
int ActualCore = Thread.ActualCore;
SchedulerThread SchedThread = WaitingToRun.Pop(ActualCore, Thread.ActualPriority);
SchedulerThread NewThread = WaitingToRun.Pop(ActualCore, Thread.ActualPriority);
if (SchedThread == null)
if (NewThread == null)
{
PrintDbgThreadInfo(Thread, "resumed because theres nothing better to run.");
return;
}
if (SchedThread != null)
{
SchedThread.Thread.ActualCore = ActualCore;
NewThread.Thread.ActualCore = ActualCore;
RunThread(SchedThread);
}
CoreThreads[ActualCore] = NewThread.Thread;
RunThread(NewThread);
}
TryResumingExecution(SchedThread);
}
else
{
//Just stop running the thread if it's not active,
//and run whatever is waiting to run with the higuest priority.
Suspend(Thread);
}
Resume(Thread);
}
public bool TryRunning(KThread Thread)
{
//Failing to get the thread here is fine,
//the thread may not have been started yet.
if (AllThreads.TryGetValue(Thread, out SchedulerThread SchedThread))
{
lock (SchedLock)
{
if (WaitingToRun.HasThread(SchedThread) && AddActiveCore(Thread))
{
WaitingToRun.Remove(SchedThread);
RunThread(SchedThread);
return true;
}
}
}
return false;
}
public void Resume(KThread Thread)
{
if (!AllThreads.TryGetValue(Thread, out SchedulerThread SchedThread))
{
throw new InvalidOperationException();
}
TryResumingExecution(SchedThread);
TryResumingExecution(AllThreads[Thread]);
}
private void TryResumingExecution(SchedulerThread SchedThread)
@ -248,7 +239,7 @@ namespace Ryujinx.Core.OsHle.Handles
lock (SchedLock)
{
if (AddActiveCore(Thread))
if (TryAddToCore(Thread))
{
PrintDbgThreadInfo(Thread, "resuming execution...");
@ -257,6 +248,8 @@ namespace Ryujinx.Core.OsHle.Handles
WaitingToRun.Push(SchedThread);
SetReschedule(Thread.ProcessorId);
PrintDbgThreadInfo(Thread, "entering wait state...");
}
@ -287,71 +280,36 @@ namespace Ryujinx.Core.OsHle.Handles
}
}
private bool IsActive(KThread Thread)
private bool TryAddToCore(KThread Thread)
{
if (!AllThreads.TryGetValue(Thread, out SchedulerThread SchedThread))
//First, try running it on Ideal Core.
int IdealCore = Thread.IdealCore;
if (IdealCore != -1 && CoreThreads[IdealCore] == null)
{
throw new InvalidOperationException();
Thread.ActualCore = IdealCore;
CoreThreads[IdealCore] = Thread;
return true;
}
return SchedThread.IsActive;
}
//If that fails, then try running on any core allowed by Core Mask.
int CoreMask = Thread.CoreMask;
private bool AddActiveCore(KThread Thread)
{
int CoreMask;
lock (SchedLock)
for (int Core = 0; Core < CoreThreads.Length; Core++, CoreMask >>= 1)
{
//First, try running it on Ideal Core.
int IdealCore = Thread.IdealCore;
if (IdealCore != -1)
if ((CoreMask & 1) != 0 && CoreThreads[Core] == null)
{
CoreMask = 1 << IdealCore;
Thread.ActualCore = Core;
if ((ActiveCores & CoreMask) == 0)
{
ActiveCores |= CoreMask;
CoreThreads[Core] = Thread;
Thread.ActualCore = IdealCore;
return true;
}
return true;
}
//If that fails, then try running on any core allowed by Core Mask.
CoreMask = Thread.CoreMask & ~ActiveCores;
if (CoreMask != 0)
{
CoreMask &= -CoreMask;
ActiveCores |= CoreMask;
for (int Bit = 0; Bit < 32; Bit++)
{
if (((CoreMask >> Bit) & 1) != 0)
{
Thread.ActualCore = Bit;
return true;
}
}
throw new InvalidOperationException();
}
return false;
}
}
private void RemoveActiveCore(int Core)
{
lock (SchedLock)
{
ActiveCores &= ~(1 << Core);
}
return false;
}
private void PrintDbgThreadInfo(KThread Thread, string Message)

18
Ryujinx.Core/OsHle/Handles/KThread.cs
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@ -12,6 +12,8 @@ namespace Ryujinx.Core.OsHle.Handles
public long MutexAddress { get; set; }
public long CondVarAddress { get; set; }
public bool CondVarSignaled { get; set; }
private Process Process;
public List<KThread> MutexWaiters { get; private set; }
@ -21,8 +23,9 @@ namespace Ryujinx.Core.OsHle.Handles
public int ActualPriority { get; private set; }
public int WantedPriority { get; private set; }
public int ActualCore { get; set; }
public int IdealCore { get; set; }
public int ActualCore { get; set; }
public int ProcessorId { get; set; }
public int IdealCore { get; set; }
public int WaitHandle { get; set; }
@ -31,16 +34,17 @@ namespace Ryujinx.Core.OsHle.Handles
public KThread(
AThread Thread,
Process Process,
int IdealCore,
int ProcessorId,
int Priority)
{
this.Thread = Thread;
this.Process = Process;
this.IdealCore = IdealCore;
this.Thread = Thread;
this.Process = Process;
this.ProcessorId = ProcessorId;
this.IdealCore = ProcessorId;
MutexWaiters = new List<KThread>();
CoreMask = 1 << IdealCore;
CoreMask = 1 << ProcessorId;
ActualPriority = WantedPriority = Priority;
}

2
Ryujinx.Core/OsHle/Handles/SchedulerThread.cs
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@ -11,6 +11,8 @@ namespace Ryujinx.Core.OsHle.Handles
public bool IsActive { get; set; }
public bool NeedsReschedule { get; set; }
public AutoResetEvent WaitSync { get; private set; }
public ManualResetEvent WaitActivity { get; private set; }
public AutoResetEvent WaitSched { get; private set; }

2
Ryujinx.Core/OsHle/Kernel/SvcHandler.cs
View File

@ -96,6 +96,8 @@ namespace Ryujinx.Core.OsHle.Kernel
Func(ThreadState);
Process.Scheduler.Reschedule(Process.GetThread(ThreadState.Tpidr));
Ns.Log.PrintDebug(LogClass.KernelSvc, $"{Func.Method.Name} ended.");
}
else

27
Ryujinx.Core/OsHle/Kernel/SvcThread.cs
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@ -55,13 +55,12 @@ namespace Ryujinx.Core.OsHle.Kernel
{
int Handle = (int)ThreadState.X0;
KThread CurrThread = Process.HandleTable.GetData<KThread>(Handle);
KThread NewThread = Process.HandleTable.GetData<KThread>(Handle);
if (CurrThread != null)
if (NewThread != null)
{
Process.Scheduler.StartThread(CurrThread);
Process.Scheduler.Yield(Process.GetThread(ThreadState.Tpidr));
Process.Scheduler.StartThread(NewThread);
Process.Scheduler.SetReschedule(NewThread.ProcessorId);
ThreadState.X0 = 0;
}
@ -82,19 +81,19 @@ namespace Ryujinx.Core.OsHle.Kernel
private void SvcSleepThread(AThreadState ThreadState)
{
ulong Ns = ThreadState.X0;
ulong TimeoutNs = ThreadState.X0;
KThread CurrThread = Process.GetThread(ThreadState.Tpidr);
if (Ns == 0)
if (TimeoutNs == 0)
{
Process.Scheduler.Yield(CurrThread);
Process.Scheduler.SetReschedule(CurrThread.ActualCore);
}
else
{
Process.Scheduler.Suspend(CurrThread);
Thread.Sleep(NsTimeConverter.GetTimeMs(Ns));
Thread.Sleep(NsTimeConverter.GetTimeMs(TimeoutNs));
Process.Scheduler.Resume(CurrThread);
}
@ -210,15 +209,7 @@ namespace Ryujinx.Core.OsHle.Kernel
Thread.CoreMask = (int)CoreMask;
KThread CurrThread = Process.GetThread(ThreadState.Tpidr);
//Try yielding execution, for the case where the new
//core mask allows the thread to run on the current core.
Process.Scheduler.Yield(CurrThread);
//Try running the modified thread, for the case where one
//of the cores specified on the core mask is free.
Process.Scheduler.TryRunning(Thread);
Process.Scheduler.TryToRun(Thread);
ThreadState.X0 = 0;
}

117
Ryujinx.Core/OsHle/Kernel/SvcThreadSync.cs
View File

@ -96,10 +96,7 @@ namespace Ryujinx.Core.OsHle.Kernel
return;
}
if (MutexUnlock(Process.GetThread(ThreadState.Tpidr), MutexAddress))
{
Process.Scheduler.Yield(Process.GetThread(ThreadState.Tpidr));
}
MutexUnlock(Process.GetThread(ThreadState.Tpidr), MutexAddress);
ThreadState.X0 = 0;
}
@ -157,8 +154,6 @@ namespace Ryujinx.Core.OsHle.Kernel
return;
}
Process.Scheduler.Yield(Process.GetThread(ThreadState.Tpidr));
ThreadState.X0 = 0;
}
@ -167,7 +162,13 @@ namespace Ryujinx.Core.OsHle.Kernel
long CondVarAddress = (long)ThreadState.X0;
int Count = (int)ThreadState.X1;
CondVarSignal(CondVarAddress, Count);
Ns.Log.PrintDebug(LogClass.KernelSvc,
"CondVarAddress = " + CondVarAddress.ToString("x16") + ", " +
"Count = " + Count .ToString("x8"));
KThread CurrThread = Process.GetThread(ThreadState.Tpidr);
CondVarSignal(CurrThread, CondVarAddress, Count);
ThreadState.X0 = 0;
}
@ -179,12 +180,12 @@ namespace Ryujinx.Core.OsHle.Kernel
int WaitThreadHandle,
long MutexAddress)
{
int MutexValue = Process.Memory.ReadInt32(MutexAddress);
Ns.Log.PrintDebug(LogClass.KernelSvc, "MutexValue = " + MutexValue.ToString("x8"));
lock (Process.ThreadSyncLock)
{
int MutexValue = Process.Memory.ReadInt32(MutexAddress);
Ns.Log.PrintDebug(LogClass.KernelSvc, "MutexValue = " + MutexValue.ToString("x8"));
if (MutexValue != (OwnerThreadHandle | MutexHasListenersMask))
{
return;
@ -201,20 +202,13 @@ namespace Ryujinx.Core.OsHle.Kernel
Process.Scheduler.EnterWait(CurrThread);
}
private bool MutexUnlock(KThread CurrThread, long MutexAddress)
private void MutexUnlock(KThread CurrThread, long MutexAddress)
{
if (CurrThread == null)
{
Ns.Log.PrintWarning(LogClass.KernelSvc, $"Invalid mutex 0x{MutexAddress:x16}!");
return false;
}
lock (Process.ThreadSyncLock)
{
//This is the new thread that will not own the mutex.
//If no threads are waiting for the lock, then it should be null.
KThread OwnerThread = GetHighestPriority(CurrThread.MutexWaiters, MutexAddress);
KThread OwnerThread = PopThread(CurrThread.MutexWaiters, x => x.MutexAddress == MutexAddress);
if (OwnerThread != null)
{
@ -240,16 +234,12 @@ namespace Ryujinx.Core.OsHle.Kernel
Process.Scheduler.WakeUp(OwnerThread);
Ns.Log.PrintDebug(LogClass.KernelSvc, "Gave mutex to thread id " + OwnerThread.ThreadId + "!");
return true;
}
else
{
Process.Memory.WriteInt32(MutexAddress, 0);
Ns.Log.PrintDebug(LogClass.KernelSvc, "No threads waiting mutex!");
return false;
}
}
}
@ -265,8 +255,10 @@ namespace Ryujinx.Core.OsHle.Kernel
WaitThread.MutexAddress = MutexAddress;
WaitThread.CondVarAddress = CondVarAddress;
lock (Process.ThreadArbiterListLock)
lock (Process.ThreadArbiterList)
{
WaitThread.CondVarSignaled = false;
Process.ThreadArbiterList.Add(WaitThread);
}
@ -274,58 +266,77 @@ namespace Ryujinx.Core.OsHle.Kernel
if (Timeout != ulong.MaxValue)
{
return Process.Scheduler.EnterWait(WaitThread, NsTimeConverter.GetTimeMs(Timeout));
Process.Scheduler.EnterWait(WaitThread, NsTimeConverter.GetTimeMs(Timeout));
lock (Process.ThreadArbiterList)
{
if (!WaitThread.CondVarSignaled)
{
Process.ThreadArbiterList.Remove(WaitThread);
return false;
}
}
}
else
{
Process.Scheduler.EnterWait(WaitThread);
return true;
}
return true;
}
private void CondVarSignal(long CondVarAddress, int Count)
private void CondVarSignal(KThread CurrThread, long CondVarAddress, int Count)
{
lock (Process.ThreadArbiterListLock)
lock (Process.ThreadArbiterList)
{
KThread CurrThread = GetHighestPriority(CondVarAddress);
while (CurrThread != null && (Count == -1 || Count-- > 0))
while (Count == -1 || Count-- > 0)
{
AcquireMutexValue(CurrThread.MutexAddress);
KThread WaitThread = PopThread(Process.ThreadArbiterList, x => x.CondVarAddress == CondVarAddress);
int MutexValue = Process.Memory.ReadInt32(CurrThread.MutexAddress);
if (WaitThread == null)
{
Ns.Log.PrintDebug(LogClass.KernelSvc, "No more threads to wake up!");
break;
}
WaitThread.CondVarSignaled = true;
AcquireMutexValue(WaitThread.MutexAddress);
int MutexValue = Process.Memory.ReadInt32(WaitThread.MutexAddress);
Ns.Log.PrintDebug(LogClass.KernelSvc, "MutexValue = " + MutexValue.ToString("x8"));
if (MutexValue == 0)
{
//Give the lock to this thread.
Process.Memory.WriteInt32(CurrThread.MutexAddress, CurrThread.WaitHandle);
Process.Memory.WriteInt32(WaitThread.MutexAddress, WaitThread.WaitHandle);
CurrThread.WaitHandle = 0;
CurrThread.MutexAddress = 0;
CurrThread.CondVarAddress = 0;
WaitThread.WaitHandle = 0;
WaitThread.MutexAddress = 0;
WaitThread.CondVarAddress = 0;
CurrThread.MutexOwner?.UpdatePriority();
WaitThread.MutexOwner?.UpdatePriority();
CurrThread.MutexOwner = null;
WaitThread.MutexOwner = null;
Process.Scheduler.WakeUp(CurrThread);
Process.Scheduler.WakeUp(WaitThread);
}
else
{
//Wait until the lock is released.
MutexValue &= ~MutexHasListenersMask;
InsertWaitingMutexThread(MutexValue, CurrThread);
InsertWaitingMutexThread(MutexValue, WaitThread);
MutexValue |= MutexHasListenersMask;
Process.Memory.WriteInt32(CurrThread.MutexAddress, MutexValue);
Process.Memory.WriteInt32(WaitThread.MutexAddress, MutexValue);
}
ReleaseMutexValue(CurrThread.MutexAddress);
CurrThread = GetHighestPriority(CondVarAddress);
ReleaseMutexValue(WaitThread.MutexAddress);
}
}
}
@ -381,17 +392,7 @@ namespace Ryujinx.Core.OsHle.Kernel
}
}
private KThread GetHighestPriority(List<KThread> Threads, long MutexAddress)
{
return GetHighestPriority(Threads, x => x.MutexAddress == MutexAddress);
}
private KThread GetHighestPriority(long CondVarAddress)
{
return GetHighestPriority(Process.ThreadArbiterList, x => x.CondVarAddress == CondVarAddress);
}
private KThread GetHighestPriority(List<KThread> Threads, Func<KThread, bool> Predicate)
private KThread PopThread(List<KThread> Threads, Func<KThread, bool> Predicate)
{
KThread Thread = Threads.OrderBy(x => x.ActualPriority).FirstOrDefault(Predicate);

4
Ryujinx.Core/OsHle/Process.cs
View File

@ -40,8 +40,6 @@ namespace Ryujinx.Core.OsHle
public List<KThread> ThreadArbiterList { get; private set; }
public object ThreadArbiterListLock { get; private set; }
public object ThreadSyncLock { get; private set; }
public KProcessHandleTable HandleTable { get; private set; }
@ -76,8 +74,6 @@ namespace Ryujinx.Core.OsHle
ThreadArbiterList = new List<KThread>();
ThreadArbiterListLock = new object();
ThreadSyncLock = new object();
HandleTable = new KProcessHandleTable();