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Ryujinx/Ryujinx.Cpu/MemoryEhMeilleure.cs
gdkchan 95017b8c66
Support memory aliasing (#2954)
* Back to the origins: Make memory manager take guest PA rather than host address once again

* Direct mapping with alias support on Windows

* Fixes and remove more of the emulated shared memory

* Linux support

* Make shared and transfer memory not depend on SharedMemoryStorage

* More efficient view mapping on Windows (no more restricted to 4KB pages at a time)

* Handle potential access violations caused by partial unmap

* Implement host mapping using shared memory on Linux

* Add new GetPhysicalAddressChecked method, used to ensure the virtual address is mapped before address translation

Also align GetRef behaviour with software memory manager

* We don't need a mirrorable memory block for software memory manager mode

* Disable memory aliasing tests while we don't have shared memory support on Mac

* Shared memory & SIGBUS handler for macOS

* Fix typo + nits + re-enable memory tests

* Set MAP_JIT_DARWIN on x86 Mac too

* Add back the address space mirror

* Only set MAP_JIT_DARWIN if we are mapping as executable

* Disable aliasing tests again (still fails on Mac)

* Fix UnmapView4KB (by not casting size to int)

* Use ref counting on memory blocks to delay closing the shared memory handle until all blocks using it are disposed

* Address PR feedback

* Make RO hold a reference to the guest process memory manager to avoid early disposal

Co-authored-by: nastys <nastys@users.noreply.github.com>
2022-05-02 20:30:02 -03:00

41 lines
1.3 KiB
C#

using ARMeilleure.Signal;
using Ryujinx.Memory;
using Ryujinx.Memory.Tracking;
using System;
using System.Runtime.InteropServices;
namespace Ryujinx.Cpu
{
class MemoryEhMeilleure : IDisposable
{
private delegate bool TrackingEventDelegate(ulong address, ulong size, bool write, bool precise = false);
private readonly MemoryBlock _addressSpace;
private readonly MemoryTracking _tracking;
private readonly TrackingEventDelegate _trackingEvent;
private readonly ulong _baseAddress;
public MemoryEhMeilleure(MemoryBlock addressSpace, MemoryTracking tracking)
{
_addressSpace = addressSpace;
_tracking = tracking;
_baseAddress = (ulong)_addressSpace.Pointer;
ulong endAddress = _baseAddress + addressSpace.Size;
_trackingEvent = new TrackingEventDelegate(tracking.VirtualMemoryEventEh);
bool added = NativeSignalHandler.AddTrackedRegion((nuint)_baseAddress, (nuint)endAddress, Marshal.GetFunctionPointerForDelegate(_trackingEvent));
if (!added)
{
throw new InvalidOperationException("Number of allowed tracked regions exceeded.");
}
}
public void Dispose()
{
NativeSignalHandler.RemoveTrackedRegion((nuint)_baseAddress);
}
}
}