/// <summary>
/// Creates a new instance of the host mapped memory manager.
/// </summary>
/// <param name="backingMemory">Physical backing memory where virtual memory will be mapped to</param>
/// <param name="addressSpaceSize">Size of the address space</param>
/// <param name="unsafeMode">True if unmanaged access should not be masked (unsafe), false otherwise.</param>
/// <param name="invalidAccessHandler">Optional function to handle invalid memory accesses</param>
public MemoryManagerHostMapped(MemoryBlock backingMemory, ulong addressSpaceSize, bool unsafeMode, InvalidAccessHandler invalidAccessHandler = null)
{
_backingMemory = backingMemory;
_pageTable = new PageTable <ulong>();
_invalidAccessHandler = invalidAccessHandler;
_unsafeMode = unsafeMode;
_addressSpaceSize = addressSpaceSize;
ulong asSize = PageSize;
int asBits = PageBits;
while (asSize < addressSpaceSize)
{
asSize <<= 1;
asBits++;
}
AddressSpaceBits = asBits;
_pageBitmap = new ulong[1 << (AddressSpaceBits - (PageBits + PageToPteShift))];
MemoryAllocationFlags asFlags = MemoryAllocationFlags.Reserve | MemoryAllocationFlags.ViewCompatible;
_addressSpace = new MemoryBlock(asSize, asFlags);
_addressSpaceMirror = new MemoryBlock(asSize, asFlags | MemoryAllocationFlags.ForceWindows4KBViewMapping);
Tracking = new MemoryTracking(this, PageSize, invalidAccessHandler);
_memoryEh = new MemoryEhMeilleure(_addressSpace, Tracking);
}
public MemoryEhMeilleure(MemoryBlock addressSpace, MemoryBlock addressSpaceMirror, MemoryTracking tracking)
{
_tracking = tracking;
_baseAddress = (ulong)addressSpace.Pointer;
ulong endAddress = _baseAddress + addressSpace.Size;
_trackingEvent = new TrackingEventDelegate(tracking.VirtualMemoryEvent);
bool added = NativeSignalHandler.AddTrackedRegion((nuint)_baseAddress, (nuint)endAddress, Marshal.GetFunctionPointerForDelegate(_trackingEvent));
if (!added)
{
throw new InvalidOperationException("Number of allowed tracked regions exceeded.");
}
if (OperatingSystem.IsWindows())
{
// Add a tracking event with no signal handler for the mirror on Windows.
// The native handler has its own code to check for the partial overlap race when regions are protected by accident,
// and when there is no signal handler present.
_mirrorAddress = (ulong)addressSpaceMirror.Pointer;
ulong endAddressMirror = _mirrorAddress + addressSpace.Size;
bool addedMirror = NativeSignalHandler.AddTrackedRegion((nuint)_mirrorAddress, (nuint)endAddressMirror, IntPtr.Zero);
if (!addedMirror)
{
throw new InvalidOperationException("Number of allowed tracked regions exceeded.");
}
}
}
private (MemoryBlock virt, MemoryBlock mirror, MemoryEhMeilleure exceptionHandler) GetVirtual(ulong asSize)
{
MemoryAllocationFlags asFlags = MemoryAllocationFlags.Reserve | MemoryAllocationFlags.ViewCompatible;
var addressSpace = new MemoryBlock(asSize, asFlags);
var addressSpaceMirror = new MemoryBlock(asSize, asFlags);
var tracking = new MemoryTracking(new MockVirtualMemoryManager(asSize, 0x1000), 0x1000);
var exceptionHandler = new MemoryEhMeilleure(addressSpace, addressSpaceMirror, tracking);
return(addressSpace, addressSpaceMirror, exceptionHandler);
}
public MemoryEhMeilleure(MemoryBlock addressSpace, MemoryTracking tracking)
{
_addressSpace = addressSpace;
_tracking = tracking;
_baseAddress = (ulong)_addressSpace.Pointer;
ulong endAddress = _baseAddress + addressSpace.Size;
_trackingEvent = new TrackingEventDelegate(tracking.VirtualMemoryEvent);
bool added = NativeSignalHandler.AddTrackedRegion((nuint)_baseAddress, (nuint)endAddress, Marshal.GetFunctionPointerForDelegate(_trackingEvent));
if (!added)
{
throw new InvalidOperationException("Number of allowed tracked regions exceeded.");
}
}
/// <summary>
/// Creates a new instance of the memory manager.
/// </summary>
/// <param name="addressSpaceSize">Size of the address space</param>
/// <param name="invalidAccessHandler">Optional function to handle invalid memory accesses</param>
public MemoryManager(ulong addressSpaceSize, InvalidAccessHandler invalidAccessHandler = null)
{
_invalidAccessHandler = invalidAccessHandler;
ulong asSize = PageSize;
int asBits = PageBits;
while (asSize < addressSpaceSize)
{
asSize <<= 1;
asBits++;
}
AddressSpaceBits = asBits;
_addressSpaceSize = asSize;
_pageTable = new MemoryBlock((asSize / PageSize) * PteSize);
Tracking = new MemoryTracking(this, PageSize);
}
/// <summary>
/// Creates a new instance of the memory manager.
/// </summary>
/// <param name="addressSpaceSize">Size of the address space</param>
/// <param name="invalidAccessHandler">Optional function to handle invalid memory accesses</param>
public MemoryManager(ulong addressSpaceSize, InvalidAccessHandler invalidAccessHandler = null)
{
_invalidAccessHandler = invalidAccessHandler;
ulong asSize = PageSize;
int asBits = PageBits;
while (asSize < addressSpaceSize)
{
asSize <<= 1;
asBits++;
}
AddressSpaceBits = asBits;
_addressSpaceSize = asSize;
_pageTable = new MemoryBlock((asSize / PageSize) * PteSize);
Tracking = new MemoryTracking(this, PageSize);
Tracking.EnablePhysicalProtection = false; // Disabled for now, as protection is done in software.
}
/// <summary>
/// Creates a new instance of the host mapped memory manager.
/// </summary>
/// <param name="addressSpaceSize">Size of the address space</param>
/// <param name="invalidAccessHandler">Optional function to handle invalid memory accesses</param>
public MemoryManagerHostMapped(ulong addressSpaceSize, InvalidAccessHandler invalidAccessHandler = null)
{
_invalidAccessHandler = invalidAccessHandler;
_addressSpaceSize = addressSpaceSize;
ulong asSize = PageSize;
int asBits = PageBits;
while (asSize < addressSpaceSize)
{
asSize <<= 1;
asBits++;
}
AddressSpaceBits = asBits;
_pageTable = new ulong[1 << (AddressSpaceBits - (PageBits + PageToPteShift))];
_addressSpace = new MemoryBlock(asSize, MemoryAllocationFlags.Reserve | MemoryAllocationFlags.Mirrorable);
_addressSpaceMirror = _addressSpace.CreateMirror();
Tracking = new MemoryTracking(this, PageSize, invalidAccessHandler);
_memoryEh = new MemoryEhMeilleure(_addressSpace, Tracking);
}
public void Setup()
{
_memoryBlock = new MemoryBlock(MemorySize);
_memoryManager = new MockVirtualMemoryManager(MemorySize, PageSize);
_tracking = new MemoryTracking(_memoryManager, _memoryBlock, PageSize);
}
