62 lines
2.2 KiB
C#
62 lines
2.2 KiB
C#
using ARMeilleure.Signal;
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using Ryujinx.Memory;
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using Ryujinx.Memory.Tracking;
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using System;
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using System.Runtime.InteropServices;
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namespace Ryujinx.Cpu
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{
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public class MemoryEhMeilleure : IDisposable
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{
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private delegate bool TrackingEventDelegate(ulong address, ulong size, bool write);
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private readonly MemoryTracking _tracking;
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private readonly TrackingEventDelegate _trackingEvent;
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private readonly ulong _baseAddress;
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private readonly ulong _mirrorAddress;
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public MemoryEhMeilleure(MemoryBlock addressSpace, MemoryBlock addressSpaceMirror, MemoryTracking tracking)
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{
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_tracking = tracking;
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_baseAddress = (ulong)addressSpace.Pointer;
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ulong endAddress = _baseAddress + addressSpace.Size;
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_trackingEvent = new TrackingEventDelegate(tracking.VirtualMemoryEvent);
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bool added = NativeSignalHandler.AddTrackedRegion((nuint)_baseAddress, (nuint)endAddress, Marshal.GetFunctionPointerForDelegate(_trackingEvent));
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if (!added)
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{
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throw new InvalidOperationException("Number of allowed tracked regions exceeded.");
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}
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if (OperatingSystem.IsWindows())
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{
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// Add a tracking event with no signal handler for the mirror on Windows.
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// The native handler has its own code to check for the partial overlap race when regions are protected by accident,
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// and when there is no signal handler present.
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_mirrorAddress = (ulong)addressSpaceMirror.Pointer;
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ulong endAddressMirror = _mirrorAddress + addressSpace.Size;
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bool addedMirror = NativeSignalHandler.AddTrackedRegion((nuint)_mirrorAddress, (nuint)endAddressMirror, IntPtr.Zero);
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if (!addedMirror)
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{
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throw new InvalidOperationException("Number of allowed tracked regions exceeded.");
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}
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}
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}
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public void Dispose()
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{
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NativeSignalHandler.RemoveTrackedRegion((nuint)_baseAddress);
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if (_mirrorAddress != 0)
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{
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NativeSignalHandler.RemoveTrackedRegion((nuint)_mirrorAddress);
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}
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}
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}
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}
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