vance/ryujinx
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fix potential issue with partial unmap

Browse Source 
We must also do the unmap operation with the RWLock, otherwise faults on the unmapped region will cause crashes and the whole thing becomes pointless
This commit is contained in:
gdk 2022-06-23 13:59:43 -03:00 committed by Mary-nyan
parent 96d4ad952c
commit 93dd6d525a
1 changed files with 12 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
Ryujinx.Memory/WindowsShared/PlaceholderManager.cs
View File

@ -293,18 +293,14 @@ namespace Ryujinx.Memory.WindowsShared
if (IsMapped(overlap.Value))
{
ulong overlapStart = overlap.Start;
ulong overlapEnd = overlap.End;
ulong overlapValue = overlap.Value;
lock (_mappings)
{
_mappings.Remove(overlap);
_mappings.Add(new RangeNode<ulong>(overlapStart, overlapEnd, ulong.MaxValue));
_mappings.Add(new RangeNode<ulong>(overlap.Start, overlap.End, ulong.MaxValue));
}
bool overlapStartsBefore = overlapStart < startAddress;
bool overlapEndsAfter = overlapEnd > endAddress;
bool overlapStartsBefore = overlap.Start < startAddress;
bool overlapEndsAfter = overlap.End > endAddress;
if (overlapStartsBefore || overlapEndsAfter)
{
@ -321,25 +317,25 @@ namespace Ryujinx.Memory.WindowsShared
{
partialUnmapState.PartialUnmapsCount++;
if (!WindowsApi.UnmapViewOfFile2(WindowsApi.CurrentProcessHandle, (IntPtr)overlapStart, 2))
if (!WindowsApi.UnmapViewOfFile2(WindowsApi.CurrentProcessHandle, (IntPtr)overlap.Start, 2))
{
throw new WindowsApiException("UnmapViewOfFile2");
}
if (overlapStartsBefore)
{
ulong remapSize = startAddress - overlapStart;
ulong remapSize = startAddress - overlap.Start;
MapViewInternal(sharedMemory, overlapValue, (IntPtr)overlapStart, (IntPtr)remapSize);
RestoreRangeProtection(overlapStart, remapSize);
MapViewInternal(sharedMemory, overlap.Value, (IntPtr)overlap.Start, (IntPtr)remapSize);
RestoreRangeProtection(overlap.Start, remapSize);
}
if (overlapEndsAfter)
{
ulong overlappedSize = endAddress - overlapStart;
ulong remapBackingOffset = overlapValue + overlappedSize;
ulong remapAddress = overlapStart + overlappedSize;
ulong remapSize = overlapEnd - endAddress;
ulong overlappedSize = endAddress - overlap.Start;
ulong remapBackingOffset = overlap.Value + overlappedSize;
ulong remapAddress = overlap.Start + overlappedSize;
ulong remapSize = overlap.End - endAddress;
MapViewInternal(sharedMemory, remapBackingOffset, (IntPtr)remapAddress, (IntPtr)remapSize);
RestoreRangeProtection(remapAddress, remapSize);
@ -350,7 +346,7 @@ namespace Ryujinx.Memory.WindowsShared
partialUnmapLock.DowngradeFromWriterLock();
}
}
else if (!WindowsApi.UnmapViewOfFile2(WindowsApi.CurrentProcessHandle, (IntPtr)overlapStart, 2))
else if (!WindowsApi.UnmapViewOfFile2(WindowsApi.CurrentProcessHandle, (IntPtr)overlap.Start, 2))
{
throw new WindowsApiException("UnmapViewOfFile2");
}