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>
69 lines
2 KiB
C#
69 lines
2 KiB
C#
using System;
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using System.Runtime.InteropServices;
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namespace ARMeilleure.Signal
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{
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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unsafe struct SigSet
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{
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fixed long sa_mask[16];
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct SigAction
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{
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public IntPtr sa_handler;
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public SigSet sa_mask;
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public int sa_flags;
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public IntPtr sa_restorer;
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}
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static class UnixSignalHandlerRegistration
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{
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private const int SIGSEGV = 11;
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private const int SIGBUS = 10;
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private const int SA_SIGINFO = 0x00000004;
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[DllImport("libc", SetLastError = true)]
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private static extern int sigaction(int signum, ref SigAction sigAction, out SigAction oldAction);
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[DllImport("libc", SetLastError = true)]
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private static extern int sigemptyset(ref SigSet set);
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public static SigAction RegisterExceptionHandler(IntPtr action)
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{
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SigAction sig = new SigAction
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{
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sa_handler = action,
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sa_flags = SA_SIGINFO
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};
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sigemptyset(ref sig.sa_mask);
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int result = sigaction(SIGSEGV, ref sig, out SigAction old);
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if (result != 0)
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{
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throw new InvalidOperationException($"Could not register SIGSEGV sigaction. Error: {result}");
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}
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if (OperatingSystem.IsMacOS())
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{
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result = sigaction(SIGBUS, ref sig, out SigAction oldb);
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if (result != 0)
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{
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throw new InvalidOperationException($"Could not register SIGBUS sigaction. Error: {result}");
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}
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}
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return old;
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}
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public static bool RestoreExceptionHandler(SigAction oldAction)
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{
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return sigaction(SIGSEGV, ref oldAction, out SigAction _) == 0 && (!OperatingSystem.IsMacOS() || sigaction(SIGBUS, ref oldAction, out SigAction _) == 0);
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}
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}
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}
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