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Query multiple pages at once with GetWriteWatch (#222)

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* Query multiple pages at once with GetWriteWatch

* Allow multiple buffer types to share the same page, aways use the physical address as cache key

* Remove a variable that is no longer needed
This commit is contained in:
gdkchan 2018-07-08 16:55:15 -03:00 committed by GitHub
parent a47b96571e
commit 0daf70a1d9
2 changed files with 58 additions and 29 deletions
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58
Memory/AMemory.cs
View file

@ -33,19 +33,25 @@ namespace ChocolArm64.Memory
private byte* RamPtr;
private int HostPageSize;
public AMemory()
{
Manager = new AMemoryMgr();
Monitors = new Dictionary<int, ArmMonitor>();
IntPtr Size = (IntPtr)AMemoryMgr.RamSize + AMemoryMgr.PageSize;
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
Ram = AMemoryWin32.Allocate((IntPtr)AMemoryMgr.RamSize + AMemoryMgr.PageSize);
Ram = AMemoryWin32.Allocate(Size);
HostPageSize = AMemoryWin32.GetPageSize(Ram, Size);
}
else
{
Ram = Marshal.AllocHGlobal((IntPtr)AMemoryMgr.RamSize + AMemoryMgr.PageSize);
Ram = Marshal.AllocHGlobal(Size);
}
RamPtr = (byte*)Ram;
@ -149,49 +155,53 @@ namespace ChocolArm64.Memory
}
}
public long GetHostPageSize()
public int GetHostPageSize()
{
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return AMemoryMgr.PageSize;
}
IntPtr MemAddress = new IntPtr(RamPtr);
IntPtr MemSize = new IntPtr(AMemoryMgr.RamSize);
long PageSize = AMemoryWin32.IsRegionModified(MemAddress, MemSize, Reset: false);
if (PageSize < 1)
{
throw new InvalidOperationException();
}
return PageSize;
return HostPageSize;
}
public bool IsRegionModified(long Position, long Size)
public bool[] IsRegionModified(long Position, long Size)
{
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return true;
return null;
}
long EndPos = Position + Size;
if ((ulong)EndPos < (ulong)Position)
{
return false;
return null;
}
if ((ulong)EndPos > AMemoryMgr.RamSize)
{
return false;
return null;
}
IntPtr MemAddress = new IntPtr(RamPtr + Position);
IntPtr MemSize = new IntPtr(Size);
return AMemoryWin32.IsRegionModified(MemAddress, MemSize, Reset: true) != 0;
int HostPageMask = HostPageSize - 1;
Position &= ~HostPageMask;
Size = EndPos - Position;
IntPtr[] Addresses = new IntPtr[(Size + HostPageMask) / HostPageSize];
AMemoryWin32.IsRegionModified(MemAddress, MemSize, Addresses, out int Count);
bool[] Modified = new bool[Addresses.Length];
for (int Index = 0; Index < Count; Index++)
{
long VA = Addresses[Index].ToInt64() - Ram.ToInt64();
Modified[(VA - Position) / HostPageSize] = true;
}
return Modified;
}
public sbyte ReadSByte(long Position)

29
Memory/AMemoryWin32.cs
View file

@ -49,7 +49,7 @@ namespace ChocolArm64.Memory
VirtualFree(Address, IntPtr.Zero, MEM_RELEASE);
}
public unsafe static long IsRegionModified(IntPtr Address, IntPtr Size, bool Reset)
public unsafe static int GetPageSize(IntPtr Address, IntPtr Size)
{
IntPtr[] Addresses = new IntPtr[1];
@ -57,17 +57,36 @@ namespace ChocolArm64.Memory
long Granularity;
int Flags = Reset ? WRITE_WATCH_FLAG_RESET : 0;
GetWriteWatch(
Flags,
0,
Address,
Size,
Addresses,
&Count,
&Granularity);
return Count != 0 ? Granularity : 0;
return (int)Granularity;
}
public unsafe static void IsRegionModified(
IntPtr Address,
IntPtr Size,
IntPtr[] Addresses,
out int AddrCount)
{
long Count = Addresses.Length;
long Granularity;
GetWriteWatch(
WRITE_WATCH_FLAG_RESET,
Address,
Size,
Addresses,
&Count,
&Granularity);
AddrCount = (int)Count;
}
}
}