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using Ryujinx.Common;
using Ryujinx.Common.Collections;
using Ryujinx.Memory;
using Ryujinx.Memory.Tracking;
using System;
namespace Ryujinx.Cpu.Jit.HostTracked
{
readonly struct AddressSpacePartitionAllocation : IDisposable
{
private readonly AddressSpacePartitionAllocator _owner;
private readonly PrivateMemoryAllocatorImpl<AddressSpacePartitionAllocator.Block>.Allocation _allocation;
public IntPtr Pointer => (IntPtr)((ulong)_allocation.Block.Memory.Pointer + _allocation.Offset);
public bool IsValid => _owner != null;
public AddressSpacePartitionAllocation(
AddressSpacePartitionAllocator owner,
PrivateMemoryAllocatorImpl<AddressSpacePartitionAllocator.Block>.Allocation allocation)
{
_owner = owner;
_allocation = allocation;
}
public void RegisterMapping(ulong va, ulong endVa)
{
_allocation.Block.AddMapping(_allocation.Offset, _allocation.Size, va, endVa);
}
public void MapView(MemoryBlock srcBlock, ulong srcOffset, ulong dstOffset, ulong size)
{
_allocation.Block.Memory.MapView(srcBlock, srcOffset, _allocation.Offset + dstOffset, size);
}
public void UnmapView(MemoryBlock srcBlock, ulong offset, ulong size)
{
_allocation.Block.Memory.UnmapView(srcBlock, _allocation.Offset + offset, size);
}
public void Reprotect(ulong offset, ulong size, MemoryPermission permission, bool throwOnFail)
{
_allocation.Block.Memory.Reprotect(_allocation.Offset + offset, size, permission, throwOnFail);
}
public IntPtr GetPointer(ulong offset, ulong size)
{
return _allocation.Block.Memory.GetPointer(_allocation.Offset + offset, size);
}
public void Dispose()
{
_allocation.Block.RemoveMapping(_allocation.Offset, _allocation.Size);
_owner.Free(_allocation.Block, _allocation.Offset, _allocation.Size);
}
}
class AddressSpacePartitionAllocator : PrivateMemoryAllocatorImpl<AddressSpacePartitionAllocator.Block>
{
private const ulong DefaultBlockAlignment = 1UL << 32; // 4GB
public class Block : PrivateMemoryAllocator.Block
{
private readonly MemoryTracking _tracking;
private readonly Func<ulong, ulong> _readPtCallback;
private readonly MemoryEhMeilleure _memoryEh;
private class Mapping : IntrusiveRedBlackTreeNode<Mapping>, IComparable<Mapping>, IComparable<ulong>
{
public ulong Address { get; }
public ulong Size { get; }
public ulong EndAddress => Address + Size;
public ulong Va { get; }
public ulong EndVa { get; }
public Mapping(ulong address, ulong size, ulong va, ulong endVa)
{
Address = address;
Size = size;
Va = va;
EndVa = endVa;
}
public int CompareTo(Mapping other)
{
if (Address < other.Address)
{
return -1;
}
else if (Address <= other.EndAddress - 1UL)
{
return 0;
}
else
{
return 1;
}
}
public int CompareTo(ulong address)
{
if (address < Address)
{
return -1;
}
else if (address <= EndAddress - 1UL)
{
return 0;
}
else
{
return 1;
}
}
}
private readonly AddressIntrusiveRedBlackTree<Mapping> _mappingTree;
private readonly object _lock;
public Block(MemoryTracking tracking, Func<ulong, ulong> readPtCallback, MemoryBlock memory, ulong size, object locker) : base(memory, size)
{
_tracking = tracking;
_readPtCallback = readPtCallback;
_memoryEh = new(memory, null, tracking, VirtualMemoryEvent);
_mappingTree = new();
_lock = locker;
}
public void AddMapping(ulong offset, ulong size, ulong va, ulong endVa)
{
_mappingTree.Add(new(offset, size, va, endVa));
}
public void RemoveMapping(ulong offset, ulong size)
{
_mappingTree.Remove(_mappingTree.GetNode(offset));
}
private ulong VirtualMemoryEvent(ulong address, ulong size, bool write)
{
Mapping map;
lock (_lock)
{
map = _mappingTree.GetNode(address);
}
if (map == null)
{
return 0;
}
address -= map.Address;
ulong addressAligned = BitUtils.AlignDown(address, AddressSpacePartition.GuestPageSize);
ulong endAddressAligned = BitUtils.AlignUp(address + size, AddressSpacePartition.GuestPageSize);
ulong sizeAligned = endAddressAligned - addressAligned;
if (!_tracking.VirtualMemoryEvent(map.Va + addressAligned, sizeAligned, write))
{
return 0;
}
return _readPtCallback(map.Va + address);
}
public override void Destroy()
{
_memoryEh.Dispose();
base.Destroy();
}
}
private readonly MemoryTracking _tracking;
private readonly Func<ulong, ulong> _readPtCallback;
private readonly object _lock;
public AddressSpacePartitionAllocator(
MemoryTracking tracking,
Func<ulong, ulong> readPtCallback,
object locker) : base(DefaultBlockAlignment, MemoryAllocationFlags.Reserve | MemoryAllocationFlags.ViewCompatible)
{
_tracking = tracking;
_readPtCallback = readPtCallback;
_lock = locker;
}
public AddressSpacePartitionAllocation Allocate(ulong va, ulong size)
{
AddressSpacePartitionAllocation allocation = new(this, Allocate(size, MemoryBlock.GetPageSize(), CreateBlock));
allocation.RegisterMapping(va, va + size);
return allocation;
}
private Block CreateBlock(MemoryBlock memory, ulong size)
{
return new Block(_tracking, _readPtCallback, memory, size, _lock);
}
}
}
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