Implement a new physical memory manager and replace DeviceMemory (#856)

* Implement a new physical memory manager and replace DeviceMemory * Proper generic constraints * Fix debug build * Add memory tests * New CPU memory manager and general code cleanup * Remove host memory management from CPU project, use Ryujinx.Memory instead * Fix tests * Document exceptions on MemoryBlock * Fix leak on unix memory allocation * Proper disposal of some objects on tests * Fix JitCache not being set as initialized * GetRef without checks for 8-bits and 16-bits CAS * Add MemoryBlock destructor * Throw in separate method to improve codegen * Address PR feedback * QueryModified improvements * Fix memory write tracking not marking all pages as modified in some cases * Simplify MarkRegionAsModified * Remove XML doc for ghost param * Add back optimization to avoid useless buffer updates * Add Ryujinx.Cpu project, move MemoryManager there and remove MemoryBlockWrapper * Some nits * Do not perform address translation when size is 0 * Address PR feedback and format NativeInterface class * Remove ghost parameter description * Update Ryujinx.Cpu to .NET Core 3.1 * Address PR feedback * Fix build * Return a well defined value for GetPhysicalAddress with invalid VA, and do not return unmapped ranges as modified * Typo
2020-05-03 19:54:50 -03:00 · 2020-05-03 19:54:50 -03:00 · f77694e4f7
commit f77694e4f7
parent 1758424208
126 changed files with 2176 additions and 2092 deletions
--- a/Ryujinx.Memory/MemoryManagementUnix.cs
+++ b/Ryujinx.Memory/MemoryManagementUnix.cs
@ -0,0 +1,75 @@
+using Mono.Unix.Native;
+using System;
+using System.Collections.Concurrent;
+
+namespace Ryujinx.Memory
+{
+    static class MemoryManagementUnix
+    {
+        private static readonly ConcurrentDictionary<IntPtr, ulong> _allocations = new ConcurrentDictionary<IntPtr, ulong>();
+
+        public static IntPtr Allocate(ulong size)
+        {
+            return AllocateInternal(size, MmapProts.PROT_READ | MmapProts.PROT_WRITE);
+        }
+
+        public static IntPtr Reserve(ulong size)
+        {
+            return AllocateInternal(size, MmapProts.PROT_NONE);
+        }
+
+        private static IntPtr AllocateInternal(ulong size, MmapProts prot)
+        {
+            const MmapFlags flags = MmapFlags.MAP_PRIVATE | MmapFlags.MAP_ANONYMOUS;
+
+            IntPtr ptr = Syscall.mmap(IntPtr.Zero, size, prot, flags, -1, 0);
+
+            if (ptr == new IntPtr(-1L))
+            {
+                throw new OutOfMemoryException();
+            }
+
+            if (!_allocations.TryAdd(ptr, size))
+            {
+                // This should be impossible, kernel shouldn't return an already mapped address.
+                throw new InvalidOperationException();
+            }
+
+            return ptr;
+        }
+
+        public static bool Commit(IntPtr address, ulong size)
+        {
+            return Syscall.mprotect(address, size, MmapProts.PROT_READ | MmapProts.PROT_WRITE) == 0;
+        }
+
+        public static bool Reprotect(IntPtr address, ulong size, MemoryPermission permission)
+        {
+            return Syscall.mprotect(address, size, GetProtection(permission)) == 0;
+        }
+
+        private static MmapProts GetProtection(MemoryPermission permission)
+        {
+            return permission switch
+            {
+                MemoryPermission.None => MmapProts.PROT_NONE,
+                MemoryPermission.Read => MmapProts.PROT_READ,
+                MemoryPermission.ReadAndWrite => MmapProts.PROT_READ | MmapProts.PROT_WRITE,
+                MemoryPermission.ReadAndExecute => MmapProts.PROT_READ | MmapProts.PROT_EXEC,
+                MemoryPermission.ReadWriteExecute => MmapProts.PROT_READ | MmapProts.PROT_WRITE | MmapProts.PROT_EXEC,
+                MemoryPermission.Execute => MmapProts.PROT_EXEC,
+                _ => throw new MemoryProtectionException(permission)
+            };
+        }
+
+        public static bool Free(IntPtr address)
+        {
+            if (_allocations.TryRemove(address, out ulong size))
+            {
+                return Syscall.munmap(address, size) == 0;
+            }
+
+            return false;
+        }
+    }
+}