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rework TLS allocations, more HLE's, increase import loop history

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ParantezTech
2026-03-16 20:22:58 +03:00
parent 3cf96f38de
commit 1a1d61b21c
4 changed files with 95 additions and 21 deletions
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src/SharpEmu.Core/Memory/PhysicalVirtualMemory.cs
+68
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@@ -40,6 +40,9 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool VirtualProtect(void* lpAddress, nuint dwSize, uint flNewProtect, out uint lpflOldProtect);
[DllImport("kernel32.dll")]
private static extern nuint VirtualQuery(void* lpAddress, out MemoryBasicInformation64 lpBuffer, nuint dwLength);
[DllImport("kernel32.dll")]
private static extern void FlushInstructionCache(void* hProcess, void* lpBaseAddress, nuint dwSize);
@@ -351,6 +354,11 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
return true;
}
if (!EnsureRangeCommitted((ulong)srcPtr, (ulong)destination.Length, region))
{
return false;
}
if (!TryTemporarilyProtectForRead((ulong)srcPtr, (ulong)destination.Length, region, out var touchedPages))
{
return false;
@@ -389,6 +397,11 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
return true;
}
if (!EnsureRangeCommitted((ulong)destPtr, (ulong)source.Length, region))
{
return false;
}
if (!VirtualProtect(destPtr, (nuint)source.Length, PAGE_EXECUTE_READWRITE, out var oldProtect))
{
return false;
@@ -494,6 +507,48 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
return protection is PAGE_EXECUTE or PAGE_EXECUTE_READ or PAGE_EXECUTE_READWRITE or PAGE_EXECUTE_WRITECOPY;
}
private static uint GetCommitProtection(MemoryRegion region)
{
return region.IsExecutable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
}
private static unsafe bool EnsureRangeCommitted(ulong address, ulong size, MemoryRegion region)
{
if (size == 0 || !region.IsReservedOnly)
{
return true;
}
var startPage = AlignDown(address, PageSize);
var endPage = AlignUp(address + size, PageSize);
var commitProtection = GetCommitProtection(region);
for (var pageAddress = startPage; pageAddress < endPage; pageAddress += PageSize)
{
if (VirtualQuery((void*)pageAddress, out var info, (nuint)sizeof(MemoryBasicInformation64)) == 0)
{
return false;
}
if (info.State == MEM_COMMIT)
{
continue;
}
if (info.State != MEM_RESERVE)
{
return false;
}
if (VirtualAlloc((void*)pageAddress, (nuint)PageSize, MEM_COMMIT, commitProtection) == null)
{
return false;
}
}
return true;
}
private bool TryTemporarilyProtectForRead(
ulong address,
ulong size,
@@ -558,4 +613,17 @@ public sealed unsafe class PhysicalVirtualMemory : IVirtualMemory, IDisposable
public bool IsReservedOnly { get; set; }
public uint Protection { get; set; }
}
private struct MemoryBasicInformation64
{
public ulong BaseAddress;
public ulong AllocationBase;
public uint AllocationProtect;
public uint Alignment1;
public ulong RegionSize;
public uint State;
public uint Protect;
public uint Type;
public uint Alignment2;
}
}