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Code Issues Releases Activity

Fix ThreadingLock deadlock on invalid access and TerminateProcess (#3407)

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gdkchan 2022-06-23 21:53:16 -03:00 committed by GitHub
parent e747f5cd83
commit 232b1012b0
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 34 additions and 21 deletions
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4
Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs
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@ -966,6 +966,8 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
SignalExitToDebugExited();
SignalExit();
}
KernelStatic.GetCurrentThread().Exit();
}
private void UnpauseAndTerminateAllThreadsExcept(KThread currentThread)
@ -981,7 +983,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
foreach (KThread thread in _threads)
{
if ((thread.SchedFlags & ThreadSchedState.LowMask) != ThreadSchedState.TerminationPending)
if (thread != currentThread && (thread.SchedFlags & ThreadSchedState.LowMask) != ThreadSchedState.TerminationPending)
{
thread.PrepareForTermination();
}

29
Ryujinx.Memory/Tracking/MemoryTracking.cs
View file

@ -227,6 +227,8 @@ namespace Ryujinx.Memory.Tracking
// Look up the virtual region using the region list.
// Signal up the chain to relevant handles.
bool shouldThrow = false;
lock (TrackingLock)
{
ref var overlaps = ref ThreadStaticArray<VirtualRegion>.Get();
@ -235,19 +237,18 @@ namespace Ryujinx.Memory.Tracking
if (count == 0 && !precise)
{
if (!_memoryManager.IsMapped(address))
if (_memoryManager.IsMapped(address))
{
_invalidAccessHandler?.Invoke(address);
// We can't continue - it's impossible to remove protection from the page.
// Even if the access handler wants us to continue, we wouldn't be able to.
throw new InvalidMemoryRegionException();
}
_memoryManager.TrackingReprotect(address & ~(ulong)(_pageSize - 1), (ulong)_pageSize, MemoryPermission.ReadAndWrite);
return false; // We can't handle this - it's probably a real invalid access.
}
else
{
shouldThrow = true;
}
}
else
{
for (int i = 0; i < count; i++)
{
VirtualRegion region = overlaps[i];
@ -262,6 +263,16 @@ namespace Ryujinx.Memory.Tracking
}
}
}
}
if (shouldThrow)
{
_invalidAccessHandler?.Invoke(address);
// We can't continue - it's impossible to remove protection from the page.
// Even if the access handler wants us to continue, we wouldn't be able to.
throw new InvalidMemoryRegionException();
}
return true;
}