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Code Issues Releases Activity

Fix reprotection regression

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This commit is contained in:
gdk 2022-06-23 13:52:45 -03:00 committed by Mary-nyan
parent 6a07f80b76
commit 96d4ad952c
1 changed files with 25 additions and 26 deletions
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51
Ryujinx.Memory/WindowsShared/PlaceholderManager.cs
View file

@ -69,6 +69,11 @@ namespace Ryujinx.Memory.WindowsShared
{
_mappings.Add(new RangeNode<ulong>(address, address + size, ulong.MaxValue));
}
lock (_protections)
{
_protections.Add(new RangeNode<MemoryPermission>(address, size, MemoryPermission.None));
}
}
/// <summary>
@ -104,14 +109,6 @@ namespace Ryujinx.Memory.WindowsShared
}
}
if (count > 1)
{
CheckFreeResult(WindowsApi.VirtualFree(
(IntPtr)address,
(IntPtr)size,
AllocationType.Release | AllocationType.CoalescePlaceholders));
}
RemoveProtection(address, size);
}
@ -130,7 +127,7 @@ namespace Ryujinx.Memory.WindowsShared
try
{
UnmapViewInternal(sharedMemory, location, size, owner);
UnmapViewInternal(sharedMemory, location, size, owner, updateProtection: false);
MapViewInternal(sharedMemory, srcOffset, location, size);
}
finally
@ -166,6 +163,8 @@ namespace Ryujinx.Memory.WindowsShared
{
throw new WindowsApiException("MapViewOfFile3");
}
UpdateProtection((ulong)location, (ulong)size, MemoryPermission.ReadAndWrite);
}
/// <summary>
@ -189,7 +188,6 @@ namespace Ryujinx.Memory.WindowsShared
var overlap = overlaps[0];
// Tree operations might modify the node start/end values, so save a copy before we modify the tree.
ulong overlapStart = overlap.Start;
ulong overlapEnd = overlap.End;
ulong overlapValue = overlap.Value;
@ -254,7 +252,7 @@ namespace Ryujinx.Memory.WindowsShared
try
{
UnmapViewInternal(sharedMemory, location, size, owner);
UnmapViewInternal(sharedMemory, location, size, owner, updateProtection: true);
}
finally
{
@ -273,8 +271,9 @@ namespace Ryujinx.Memory.WindowsShared
/// <param name="location">Address to unmap</param>
/// <param name="size">Size of the region to unmap in bytes</param>
/// <param name="owner">Memory block that owns the mapping</param>
/// <param name="updateProtection">Indicates if the memory protections should be updated after the unmap</param>
/// <exception cref="WindowsApiException">Thrown when the Windows API returns an error unmapping or remapping the memory</exception>
private void UnmapViewInternal(IntPtr sharedMemory, IntPtr location, IntPtr size, MemoryBlock owner)
private void UnmapViewInternal(IntPtr sharedMemory, IntPtr location, IntPtr size, MemoryBlock owner, bool updateProtection)
{
ulong startAddress = (ulong)location;
ulong unmapSize = (ulong)size;
@ -294,7 +293,6 @@ namespace Ryujinx.Memory.WindowsShared
if (IsMapped(overlap.Value))
{
// Tree operations might modify the node start/end values, so save a copy before we modify the tree.
ulong overlapStart = overlap.Start;
ulong overlapEnd = overlap.End;
ulong overlapValue = overlap.Value;
@ -360,7 +358,11 @@ namespace Ryujinx.Memory.WindowsShared
}
CoalesceForUnmap(startAddress, unmapSize, owner);
RemoveProtection(startAddress, unmapSize);
if (updateProtection)
{
UpdateProtection(startAddress, unmapSize, MemoryPermission.None);
}
}
/// <summary>
@ -512,19 +514,10 @@ namespace Ryujinx.Memory.WindowsShared
success = false;
}
// We only keep track of "non-standard" protections,
// that is, everything that is not just RW (which is the default when views are mapped).
if (permission == MemoryPermission.ReadAndWrite)
{
RemoveProtection(mappedAddress, mappedSize);
}
else
{
AddProtection(mappedAddress, mappedSize, permission);
}
}
UpdateProtection(reprotectAddress, reprotectSize, permission);
return success;
}
@ -573,7 +566,7 @@ namespace Ryujinx.Memory.WindowsShared
/// <param name="address">Address of the protected region</param>
/// <param name="size">Size of the protected region in bytes</param>
/// <param name="permission">Memory permissions of the region</param>
private void AddProtection(ulong address, ulong size, MemoryPermission permission)
private void UpdateProtection(ulong address, ulong size, MemoryPermission permission)
{
ulong endAddress = address + size;
var overlaps = new RangeNode<MemoryPermission>[InitialOverlapsSize];
@ -693,6 +686,12 @@ namespace Ryujinx.Memory.WindowsShared
{
var protection = overlaps[index];
// If protection is R/W we don't need to reprotect as views are initially mapped as R/W.
if (protection.Value == MemoryPermission.ReadAndWrite)
{
continue;
}
ulong protAddress = protection.Start;
ulong protEndAddress = protection.End;