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using Ryujinx.Memory;
using System;
using System.Diagnostics;
namespace Ryujinx.Cpu.Jit.HostTracked
{
class AddressSpacePartitionMultiAllocation : IDisposable
{
private readonly AddressSpacePartitionAllocation _baseMemory;
private AddressSpacePartitionAllocation _baseMemoryRo;
private AddressSpacePartitionAllocation _baseMemoryNone;
public AddressSpacePartitionMultiAllocation(AddressSpacePartitionAllocation baseMemory)
{
_baseMemory = baseMemory;
}
public void MapView(MemoryBlock srcBlock, ulong srcOffset, ulong dstOffset, ulong size)
{
_baseMemory.MapView(srcBlock, srcOffset, dstOffset, size);
if (_baseMemoryRo.IsValid)
{
_baseMemoryRo.MapView(srcBlock, srcOffset, dstOffset, size);
_baseMemoryRo.Reprotect(dstOffset, size, MemoryPermission.Read, false);
}
}
public void LateMapView(MemoryBlock srcBlock, ulong srcOffset, ulong dstOffset, ulong size)
{
_baseMemoryRo.MapView(srcBlock, srcOffset, dstOffset, size);
_baseMemoryRo.Reprotect(dstOffset, size, MemoryPermission.Read, false);
}
public void UnmapView(MemoryBlock srcBlock, ulong offset, ulong size)
{
_baseMemory.UnmapView(srcBlock, offset, size);
if (_baseMemoryRo.IsValid)
{
_baseMemoryRo.UnmapView(srcBlock, offset, size);
}
}
public void Reprotect(ulong offset, ulong size, MemoryPermission permission, bool throwOnFail)
{
_baseMemory.Reprotect(offset, size, permission, throwOnFail);
}
public IntPtr GetPointer(ulong offset, ulong size)
{
return _baseMemory.GetPointer(offset, size);
}
public bool LazyInitMirrorForProtection(AddressSpacePartitioned addressSpace, ulong blockAddress, ulong blockSize, MemoryPermission permission)
{
if (permission == MemoryPermission.None && !_baseMemoryNone.IsValid)
{
_baseMemoryNone = addressSpace.CreateAsPartitionAllocation(blockAddress, blockSize);
}
else if (permission == MemoryPermission.Read && !_baseMemoryRo.IsValid)
{
_baseMemoryRo = addressSpace.CreateAsPartitionAllocation(blockAddress, blockSize);
return true;
}
return false;
}
public IntPtr GetPointerForProtection(ulong offset, ulong size, MemoryPermission permission)
{
AddressSpacePartitionAllocation allocation = permission switch
{
MemoryPermission.ReadAndWrite => _baseMemory,
MemoryPermission.Read => _baseMemoryRo,
MemoryPermission.None => _baseMemoryNone,
_ => throw new ArgumentException($"Invalid protection \"{permission}\"."),
};
Debug.Assert(allocation.IsValid);
return allocation.GetPointer(offset, size);
}
public void Dispose()
{
_baseMemory.Dispose();
if (_baseMemoryRo.IsValid)
{
_baseMemoryRo.Dispose();
}
if (_baseMemoryNone.IsValid)
{
_baseMemoryNone.Dispose();
}
}
}
}
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