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https://github.com/Ryujinx/Ryujinx.git
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54deded929
* Fix shared memory leak on Windows * Fix memory leak caused by RO session disposal not decrementing the memory manager ref count * Fix UnmapViewInternal deadlock * Was not supposed to add those back
170 lines
No EOL
5.9 KiB
C#
170 lines
No EOL
5.9 KiB
C#
using System;
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using System.Runtime.Versioning;
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namespace Ryujinx.Memory.WindowsShared
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{
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/// <summary>
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/// Windows 4KB memory placeholder manager.
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/// </summary>
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[SupportedOSPlatform("windows")]
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class PlaceholderManager4KB
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{
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private const int PageSize = MemoryManagementWindows.PageSize;
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private readonly IntervalTree<ulong, byte> _mappings;
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/// <summary>
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/// Creates a new instance of the Windows 4KB memory placeholder manager.
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/// </summary>
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public PlaceholderManager4KB()
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{
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_mappings = new IntervalTree<ulong, byte>();
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}
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/// <summary>
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/// Unmaps the specified range of memory and marks it as mapped internally.
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/// </summary>
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/// <remarks>
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/// Since this marks the range as mapped, the expectation is that the range will be mapped after calling this method.
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/// </remarks>
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/// <param name="location">Memory address to unmap and mark as mapped</param>
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/// <param name="size">Size of the range in bytes</param>
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public void UnmapAndMarkRangeAsMapped(IntPtr location, IntPtr size)
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{
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ulong startAddress = (ulong)location;
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ulong unmapSize = (ulong)size;
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ulong endAddress = startAddress + unmapSize;
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var overlaps = Array.Empty<IntervalTreeNode<ulong, byte>>();
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int count = 0;
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lock (_mappings)
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{
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count = _mappings.Get(startAddress, endAddress, ref overlaps);
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}
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for (int index = 0; index < count; index++)
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{
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var overlap = overlaps[index];
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// Tree operations might modify the node start/end values, so save a copy before we modify the tree.
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ulong overlapStart = overlap.Start;
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ulong overlapEnd = overlap.End;
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ulong overlapValue = overlap.Value;
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_mappings.Remove(overlap);
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ulong unmapStart = Math.Max(overlapStart, startAddress);
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ulong unmapEnd = Math.Min(overlapEnd, endAddress);
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if (overlapStart < startAddress)
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{
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startAddress = overlapStart;
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}
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if (overlapEnd > endAddress)
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{
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endAddress = overlapEnd;
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}
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ulong currentAddress = unmapStart;
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while (currentAddress < unmapEnd)
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{
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WindowsApi.UnmapViewOfFile2(WindowsApi.CurrentProcessHandle, (IntPtr)currentAddress, 2);
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currentAddress += PageSize;
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}
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}
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_mappings.Add(startAddress, endAddress, 0);
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}
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/// <summary>
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/// Unmaps views at the specified memory range.
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/// </summary>
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/// <param name="location">Address of the range</param>
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/// <param name="size">Size of the range in bytes</param>
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public void UnmapView(IntPtr location, IntPtr size)
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{
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ulong startAddress = (ulong)location;
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ulong unmapSize = (ulong)size;
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ulong endAddress = startAddress + unmapSize;
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var overlaps = Array.Empty<IntervalTreeNode<ulong, byte>>();
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int count = 0;
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lock (_mappings)
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{
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count = _mappings.Get(startAddress, endAddress, ref overlaps);
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}
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for (int index = 0; index < count; index++)
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{
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var overlap = overlaps[index];
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// Tree operations might modify the node start/end values, so save a copy before we modify the tree.
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ulong overlapStart = overlap.Start;
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ulong overlapEnd = overlap.End;
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_mappings.Remove(overlap);
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if (overlapStart < startAddress)
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{
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_mappings.Add(overlapStart, startAddress, 0);
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}
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if (overlapEnd > endAddress)
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{
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_mappings.Add(endAddress, overlapEnd, 0);
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}
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ulong unmapStart = Math.Max(overlapStart, startAddress);
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ulong unmapEnd = Math.Min(overlapEnd, endAddress);
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ulong currentAddress = unmapStart;
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while (currentAddress < unmapEnd)
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{
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WindowsApi.UnmapViewOfFile2(WindowsApi.CurrentProcessHandle, (IntPtr)currentAddress, 2);
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currentAddress += PageSize;
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}
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}
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}
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/// <summary>
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/// Unmaps mapped memory at a given range.
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/// </summary>
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/// <param name="location">Address of the range</param>
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/// <param name="size">Size of the range in bytes</param>
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public void UnmapRange(IntPtr location, IntPtr size)
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{
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ulong startAddress = (ulong)location;
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ulong unmapSize = (ulong)size;
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ulong endAddress = startAddress + unmapSize;
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var overlaps = Array.Empty<IntervalTreeNode<ulong, byte>>();
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int count = 0;
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lock (_mappings)
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{
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count = _mappings.Get(startAddress, endAddress, ref overlaps);
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}
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for (int index = 0; index < count; index++)
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{
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var overlap = overlaps[index];
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// Tree operations might modify the node start/end values, so save a copy before we modify the tree.
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ulong unmapStart = Math.Max(overlap.Start, startAddress);
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ulong unmapEnd = Math.Min(overlap.End, endAddress);
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_mappings.Remove(overlap);
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ulong currentAddress = unmapStart;
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while (currentAddress < unmapEnd)
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{
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WindowsApi.UnmapViewOfFile2(WindowsApi.CurrentProcessHandle, (IntPtr)currentAddress, 2);
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currentAddress += PageSize;
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}
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}
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}
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}
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} |