ryujinx/Ryujinx.Memory/MemoryManagement.cs
gdkchan 95017b8c66
Support memory aliasing (#2954)
* Back to the origins: Make memory manager take guest PA rather than host address once again

* Direct mapping with alias support on Windows

* Fixes and remove more of the emulated shared memory

* Linux support

* Make shared and transfer memory not depend on SharedMemoryStorage

* More efficient view mapping on Windows (no more restricted to 4KB pages at a time)

* Handle potential access violations caused by partial unmap

* Implement host mapping using shared memory on Linux

* Add new GetPhysicalAddressChecked method, used to ensure the virtual address is mapped before address translation

Also align GetRef behaviour with software memory manager

* We don't need a mirrorable memory block for software memory manager mode

* Disable memory aliasing tests while we don't have shared memory support on Mac

* Shared memory & SIGBUS handler for macOS

* Fix typo + nits + re-enable memory tests

* Set MAP_JIT_DARWIN on x86 Mac too

* Add back the address space mirror

* Only set MAP_JIT_DARWIN if we are mapping as executable

* Disable aliasing tests again (still fails on Mac)

* Fix UnmapView4KB (by not casting size to int)

* Use ref counting on memory blocks to delay closing the shared memory handle until all blocks using it are disposed

* Address PR feedback

* Make RO hold a reference to the guest process memory manager to avoid early disposal

Co-authored-by: nastys <nastys@users.noreply.github.com>
2022-05-02 20:30:02 -03:00

243 lines
7.6 KiB
C#

using System;
namespace Ryujinx.Memory
{
public static class MemoryManagement
{
public static IntPtr Allocate(ulong size)
{
if (OperatingSystem.IsWindows())
{
IntPtr sizeNint = new IntPtr((long)size);
return MemoryManagementWindows.Allocate(sizeNint);
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
return MemoryManagementUnix.Allocate(size);
}
else
{
throw new PlatformNotSupportedException();
}
}
public static IntPtr Reserve(ulong size, bool viewCompatible)
{
if (OperatingSystem.IsWindows())
{
IntPtr sizeNint = new IntPtr((long)size);
return MemoryManagementWindows.Reserve(sizeNint, viewCompatible);
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
return MemoryManagementUnix.Reserve(size);
}
else
{
throw new PlatformNotSupportedException();
}
}
public static bool Commit(IntPtr address, ulong size)
{
if (OperatingSystem.IsWindows())
{
IntPtr sizeNint = new IntPtr((long)size);
return MemoryManagementWindows.Commit(address, sizeNint);
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
return MemoryManagementUnix.Commit(address, size);
}
else
{
throw new PlatformNotSupportedException();
}
}
public static bool Decommit(IntPtr address, ulong size)
{
if (OperatingSystem.IsWindows())
{
IntPtr sizeNint = new IntPtr((long)size);
return MemoryManagementWindows.Decommit(address, sizeNint);
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
return MemoryManagementUnix.Decommit(address, size);
}
else
{
throw new PlatformNotSupportedException();
}
}
public static void MapView(IntPtr sharedMemory, ulong srcOffset, IntPtr address, ulong size, bool force4KBMap)
{
if (OperatingSystem.IsWindows())
{
IntPtr sizeNint = new IntPtr((long)size);
if (force4KBMap)
{
MemoryManagementWindows.MapView4KB(sharedMemory, srcOffset, address, sizeNint);
}
else
{
MemoryManagementWindows.MapView(sharedMemory, srcOffset, address, sizeNint);
}
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
MemoryManagementUnix.MapView(sharedMemory, srcOffset, address, size);
}
else
{
throw new PlatformNotSupportedException();
}
}
public static void UnmapView(IntPtr sharedMemory, IntPtr address, ulong size, bool force4KBMap)
{
if (OperatingSystem.IsWindows())
{
IntPtr sizeNint = new IntPtr((long)size);
if (force4KBMap)
{
MemoryManagementWindows.UnmapView4KB(address, sizeNint);
}
else
{
MemoryManagementWindows.UnmapView(sharedMemory, address, sizeNint);
}
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
MemoryManagementUnix.UnmapView(address, size);
}
else
{
throw new PlatformNotSupportedException();
}
}
public static void Reprotect(IntPtr address, ulong size, MemoryPermission permission, bool forView, bool force4KBMap, bool throwOnFail)
{
bool result;
if (OperatingSystem.IsWindows())
{
IntPtr sizeNint = new IntPtr((long)size);
if (forView && force4KBMap)
{
result = MemoryManagementWindows.Reprotect4KB(address, sizeNint, permission, forView);
}
else
{
result = MemoryManagementWindows.Reprotect(address, sizeNint, permission, forView);
}
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
result = MemoryManagementUnix.Reprotect(address, size, permission);
}
else
{
throw new PlatformNotSupportedException();
}
if (!result && throwOnFail)
{
throw new MemoryProtectionException(permission);
}
}
public static bool Free(IntPtr address)
{
if (OperatingSystem.IsWindows())
{
return MemoryManagementWindows.Free(address);
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
return MemoryManagementUnix.Free(address);
}
else
{
throw new PlatformNotSupportedException();
}
}
public static IntPtr CreateSharedMemory(ulong size, bool reserve)
{
if (OperatingSystem.IsWindows())
{
IntPtr sizeNint = new IntPtr((long)size);
return MemoryManagementWindows.CreateSharedMemory(sizeNint, reserve);
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
return MemoryManagementUnix.CreateSharedMemory(size, reserve);
}
else
{
throw new PlatformNotSupportedException();
}
}
public static void DestroySharedMemory(IntPtr handle)
{
if (OperatingSystem.IsWindows())
{
MemoryManagementWindows.DestroySharedMemory(handle);
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
MemoryManagementUnix.DestroySharedMemory(handle);
}
else
{
throw new PlatformNotSupportedException();
}
}
public static IntPtr MapSharedMemory(IntPtr handle, ulong size)
{
if (OperatingSystem.IsWindows())
{
return MemoryManagementWindows.MapSharedMemory(handle);
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
return MemoryManagementUnix.MapSharedMemory(handle, size);
}
else
{
throw new PlatformNotSupportedException();
}
}
public static void UnmapSharedMemory(IntPtr address, ulong size)
{
if (OperatingSystem.IsWindows())
{
MemoryManagementWindows.UnmapSharedMemory(address);
}
else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
{
MemoryManagementUnix.UnmapSharedMemory(address, size);
}
else
{
throw new PlatformNotSupportedException();
}
}
}
}