From 95017b8c66f70406e926b278ecdd6d4ec0a93110 Mon Sep 17 00:00:00 2001 From: gdkchan Date: Mon, 2 May 2022 20:30:02 -0300 Subject: 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 --- Ryujinx.Memory/MemoryManagerUnixHelper.cs | 41 ++++++++++++++++++++++++++++++- 1 file changed, 40 insertions(+), 1 deletion(-) (limited to 'Ryujinx.Memory/MemoryManagerUnixHelper.cs') diff --git a/Ryujinx.Memory/MemoryManagerUnixHelper.cs b/Ryujinx.Memory/MemoryManagerUnixHelper.cs index 4409ccee..8e6e7935 100644 --- a/Ryujinx.Memory/MemoryManagerUnixHelper.cs +++ b/Ryujinx.Memory/MemoryManagerUnixHelper.cs @@ -21,7 +21,23 @@ namespace Ryujinx.Memory MAP_PRIVATE = 2, MAP_ANONYMOUS = 4, MAP_NORESERVE = 8, - MAP_UNLOCKED = 16 + MAP_FIXED = 16, + MAP_UNLOCKED = 32 + } + + [Flags] + public enum OpenFlags : uint + { + O_RDONLY = 0, + O_WRONLY = 1, + O_RDWR = 2, + O_CREAT = 4, + O_EXCL = 8, + O_NOCTTY = 16, + O_TRUNC = 32, + O_APPEND = 64, + O_NONBLOCK = 128, + O_SYNC = 256, } private const int MAP_ANONYMOUS_LINUX_GENERIC = 0x20; @@ -50,6 +66,24 @@ namespace Ryujinx.Memory [DllImport("libc", SetLastError = true)] public static extern int madvise(IntPtr address, ulong size, int advice); + [DllImport("libc", SetLastError = true)] + public static extern int mkstemp(IntPtr template); + + [DllImport("libc", SetLastError = true)] + public static extern int unlink(IntPtr pathname); + + [DllImport("libc", SetLastError = true)] + public static extern int ftruncate(int fildes, IntPtr length); + + [DllImport("libc", SetLastError = true)] + public static extern int close(int fd); + + [DllImport("libc", SetLastError = true)] + public static extern int shm_open(IntPtr name, int oflag, uint mode); + + [DllImport("libc", SetLastError = true)] + public static extern int shm_unlink(IntPtr name); + private static int MmapFlagsToSystemFlags(MmapFlags flags) { int result = 0; @@ -64,6 +98,11 @@ namespace Ryujinx.Memory result |= (int)MmapFlags.MAP_PRIVATE; } + if (flags.HasFlag(MmapFlags.MAP_FIXED)) + { + result |= (int)MmapFlags.MAP_FIXED; + } + if (flags.HasFlag(MmapFlags.MAP_ANONYMOUS)) { if (OperatingSystem.IsLinux()) -- cgit v1.2.3