mirror of
https://github.com/GreemDev/Ryujinx
synced 2024-12-23 20:36:49 +01:00
95017b8c66
* 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>
183 lines
No EOL
5.8 KiB
C#
183 lines
No EOL
5.8 KiB
C#
using System;
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using System.Collections.Concurrent;
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using System.Runtime.Versioning;
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using System.Text;
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using static Ryujinx.Memory.MemoryManagerUnixHelper;
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namespace Ryujinx.Memory
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{
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[SupportedOSPlatform("linux")]
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[SupportedOSPlatform("macos")]
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static class MemoryManagementUnix
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{
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private static readonly ConcurrentDictionary<IntPtr, ulong> _allocations = new ConcurrentDictionary<IntPtr, ulong>();
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public static IntPtr Allocate(ulong size)
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{
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return AllocateInternal(size, MmapProts.PROT_READ | MmapProts.PROT_WRITE);
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}
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public static IntPtr Reserve(ulong size)
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{
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return AllocateInternal(size, MmapProts.PROT_NONE);
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}
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private static IntPtr AllocateInternal(ulong size, MmapProts prot, bool shared = false)
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{
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MmapFlags flags = MmapFlags.MAP_ANONYMOUS;
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if (shared)
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{
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flags |= MmapFlags.MAP_SHARED | MmapFlags.MAP_UNLOCKED;
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}
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else
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{
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flags |= MmapFlags.MAP_PRIVATE;
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}
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if (prot == MmapProts.PROT_NONE)
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{
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flags |= MmapFlags.MAP_NORESERVE;
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}
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IntPtr ptr = mmap(IntPtr.Zero, size, prot, flags, -1, 0);
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if (ptr == new IntPtr(-1L))
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{
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throw new OutOfMemoryException();
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}
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if (!_allocations.TryAdd(ptr, size))
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{
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// This should be impossible, kernel shouldn't return an already mapped address.
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throw new InvalidOperationException();
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}
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return ptr;
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}
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public static bool Commit(IntPtr address, ulong size)
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{
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return mprotect(address, size, MmapProts.PROT_READ | MmapProts.PROT_WRITE) == 0;
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}
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public static bool Decommit(IntPtr address, ulong size)
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{
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// Must be writable for madvise to work properly.
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mprotect(address, size, MmapProts.PROT_READ | MmapProts.PROT_WRITE);
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madvise(address, size, MADV_REMOVE);
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return mprotect(address, size, MmapProts.PROT_NONE) == 0;
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}
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public static bool Reprotect(IntPtr address, ulong size, MemoryPermission permission)
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{
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return mprotect(address, size, GetProtection(permission)) == 0;
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}
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private static MmapProts GetProtection(MemoryPermission permission)
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{
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return permission switch
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{
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MemoryPermission.None => MmapProts.PROT_NONE,
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MemoryPermission.Read => MmapProts.PROT_READ,
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MemoryPermission.ReadAndWrite => MmapProts.PROT_READ | MmapProts.PROT_WRITE,
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MemoryPermission.ReadAndExecute => MmapProts.PROT_READ | MmapProts.PROT_EXEC,
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MemoryPermission.ReadWriteExecute => MmapProts.PROT_READ | MmapProts.PROT_WRITE | MmapProts.PROT_EXEC,
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MemoryPermission.Execute => MmapProts.PROT_EXEC,
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_ => throw new MemoryProtectionException(permission)
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};
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}
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public static bool Free(IntPtr address)
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{
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if (_allocations.TryRemove(address, out ulong size))
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{
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return munmap(address, size) == 0;
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}
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return false;
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}
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public static bool Unmap(IntPtr address, ulong size)
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{
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return munmap(address, size) == 0;
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}
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public unsafe static IntPtr CreateSharedMemory(ulong size, bool reserve)
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{
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int fd;
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if (OperatingSystem.IsMacOS())
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{
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byte[] memName = Encoding.ASCII.GetBytes("Ryujinx-XXXXXX");
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fixed (byte* pMemName = memName)
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{
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fd = shm_open((IntPtr)pMemName, 0x2 | 0x200 | 0x800 | 0x400, 384); // O_RDWR | O_CREAT | O_EXCL | O_TRUNC, 0600
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if (fd == -1)
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{
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throw new OutOfMemoryException();
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}
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if (shm_unlink((IntPtr)pMemName) != 0)
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{
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throw new OutOfMemoryException();
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}
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}
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}
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else
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{
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byte[] fileName = Encoding.ASCII.GetBytes("/dev/shm/Ryujinx-XXXXXX");
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fixed (byte* pFileName = fileName)
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{
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fd = mkstemp((IntPtr)pFileName);
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if (fd == -1)
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{
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throw new OutOfMemoryException();
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}
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if (unlink((IntPtr)pFileName) != 0)
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{
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throw new OutOfMemoryException();
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}
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}
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}
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if (ftruncate(fd, (IntPtr)size) != 0)
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{
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throw new OutOfMemoryException();
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}
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return (IntPtr)fd;
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}
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public static void DestroySharedMemory(IntPtr handle)
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{
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close((int)handle);
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}
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public static IntPtr MapSharedMemory(IntPtr handle, ulong size)
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{
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return mmap(IntPtr.Zero, size, MmapProts.PROT_READ | MmapProts.PROT_WRITE, MmapFlags.MAP_SHARED, (int)handle, 0);
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}
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public static void UnmapSharedMemory(IntPtr address, ulong size)
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{
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munmap(address, size);
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}
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public static void MapView(IntPtr sharedMemory, ulong srcOffset, IntPtr location, ulong size)
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{
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mmap(location, size, MmapProts.PROT_READ | MmapProts.PROT_WRITE, MmapFlags.MAP_FIXED | MmapFlags.MAP_SHARED, (int)sharedMemory, (long)srcOffset);
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}
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public static void UnmapView(IntPtr location, ulong size)
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{
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mmap(location, size, MmapProts.PROT_NONE, MmapFlags.MAP_FIXED, -1, 0);
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}
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}
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} |