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Fix mapping leaks caused by UnmapView not working on Linux (#3650)

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* Add test for UnmapView mapping leaks

* Throw when UnmapView fails on Linux

* Fix UnmapView

* Remove throw
This commit is contained in:
gdkchan 2022-10-18 22:02:45 -03:00 committed by GitHub
parent 8d41402fa6
commit 7d26e4ac7b
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2 changed files with 27 additions and 1 deletions
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26
Ryujinx.Memory.Tests/Tests.cs
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@ -92,5 +92,31 @@ namespace Ryujinx.Memory.Tests
}
}
}
[Test]
public void Test_AliasMapLeak()
{
if (OperatingSystem.IsMacOS())
{
// Memory aliasing tests fail on CI at the moment.
return;
}
ulong pageSize = 4096;
ulong size = 100000 * pageSize; // The mappings limit on Linux is usually around 65K, so let's make sure we are above that.
using MemoryBlock backing = new MemoryBlock(pageSize, MemoryAllocationFlags.Mirrorable);
using MemoryBlock toAlias = new MemoryBlock(size, MemoryAllocationFlags.Reserve | MemoryAllocationFlags.ViewCompatible);
for (ulong offset = 0; offset < size; offset += pageSize)
{
toAlias.MapView(backing, 0, offset, pageSize);
toAlias.Write(offset, 0xbadc0de);
Assert.AreEqual(0xbadc0de, backing.Read<int>(0));
toAlias.UnmapView(backing, offset, pageSize);
}
}
}
}

2
Ryujinx.Memory/MemoryManagementUnix.cs
View file

@ -177,7 +177,7 @@ namespace Ryujinx.Memory
public static void UnmapView(IntPtr location, ulong size)
{
mmap(location, size, MmapProts.PROT_NONE, MmapFlags.MAP_FIXED, -1, 0);
mmap(location, size, MmapProts.PROT_NONE, MmapFlags.MAP_FIXED | MmapFlags.MAP_PRIVATE | MmapFlags.MAP_ANONYMOUS | MmapFlags.MAP_NORESERVE, -1, 0);
}
}
}