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Move partial unmap handler to the native signal handler (#3437)

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* Initial commit with a lot of testing stuff.

* Partial Unmap Cleanup Part 1

* Fix some minor issues, hopefully windows tests.

* Disable partial unmap tests on macos for now

Weird issue.

* Goodbye magic number

* Add COMPlus_EnableAlternateStackCheck for tests

`COMPlus_EnableAlternateStackCheck` is needed for NullReferenceException handling to work on linux after registering the signal handler, due to how dotnet registers its own signal handler.

* Address some feedback

* Force retry when memory is mapped in memory tracking

This case existed before, but returning `false` no longer retries, so it would crash immediately after unprotecting the memory... Now, we return `true` to deliberately retry.

This case existed before (was just broken by this change) and I don't really want to look into fixing the issue right now. Technically, this means that on guest code partial unmaps will retry _due to this_ rather than hitting the handler. I don't expect this to cause any issues.

This should fix random crashes in Xenoblade Chronicles 2.

* Use IsRangeMapped

* Suppress MockMemoryManager.UnmapEvent warning

This event is not signalled by the mock memory manager.

* Remove 4kb mapping
This commit is contained in:
riperiperi 2022-07-30 00:16:29 +02:00 • committed by GitHub
parent 952d013c67
commit 14ce9e1567
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24 changed files with 1355 additions and 391 deletions
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20
Ryujinx.Common/Memory/PartialUnmaps/PartialUnmapHelpers.cs Normal file
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@ -0,0 +1,20 @@
using System.Runtime.CompilerServices;
namespace Ryujinx.Common.Memory.PartialUnmaps
{
static class PartialUnmapHelpers
{
/// <summary>
/// Calculates a byte offset of a given field within a struct.
/// </summary>
/// <typeparam name="T">Struct type</typeparam>
/// <typeparam name="T2">Field type</typeparam>
/// <param name="storage">Parent struct</param>
/// <param name="target">Field</param>
/// <returns>The byte offset of the given field in the given struct</returns>
public static int OffsetOf<T, T2>(ref T2 storage, ref T target)
{
return (int)Unsafe.ByteOffset(ref Unsafe.As<T2, T>(ref storage), ref target);
}
}
}