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Print guest stack trace on invalid memory access (#1407)

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* Print guest stack trace on invalid memory access

* Improve XML docs
This commit is contained in:
gdkchan 2020-07-30 10:16:41 -03:00 • committed by GitHub
parent 636542d817
commit 57bb0abda3
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GPG key ID: 4AEE18F83AFDEB23
7 changed files with 143 additions and 75 deletions
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118
Ryujinx.Cpu/MemoryManager.cs
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@ -18,6 +18,11 @@ namespace Ryujinx.Cpu
private const int PteSize = 8;
private readonly InvalidAccessHandler _invalidAccessHandler;
/// <summary>
/// Address space width in bits.
/// </summary>
public int AddressSpaceBits { get; }
private readonly ulong _addressSpaceSize;
@ -25,6 +30,9 @@ namespace Ryujinx.Cpu
private readonly MemoryBlock _backingMemory;
private readonly MemoryBlock _pageTable;
/// <summary>
/// Page table base pointer.
/// </summary>
public IntPtr PageTablePointer => _pageTable.Pointer;
/// <summary>
@ -32,8 +40,11 @@ namespace Ryujinx.Cpu
/// </summary>
/// <param name="backingMemory">Physical backing memory where virtual memory will be mapped to</param>
/// <param name="addressSpaceSize">Size of the address space</param>
public MemoryManager(MemoryBlock backingMemory, ulong addressSpaceSize)
/// <param name="invalidAccessHandler">Optional function to handle invalid memory accesses</param>
public MemoryManager(MemoryBlock backingMemory, ulong addressSpaceSize, InvalidAccessHandler invalidAccessHandler = null)
{
_invalidAccessHandler = invalidAccessHandler;
ulong asSize = PageSize;
int asBits = PageBits;
@ -92,6 +103,7 @@ namespace Ryujinx.Cpu
/// <typeparam name="T">Type of the data being read</typeparam>
/// <param name="va">Virtual address of the data in memory</param>
/// <returns>The data</returns>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
public T Read<T>(ulong va) where T : unmanaged
{
return MemoryMarshal.Cast<byte, T>(GetSpan(va, Unsafe.SizeOf<T>()))[0];
@ -102,6 +114,7 @@ namespace Ryujinx.Cpu
/// </summary>
/// <param name="va">Virtual address of the data in memory</param>
/// <param name="data">Span to store the data being read into</param>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
public void Read(ulong va, Span<byte> data)
{
ReadImpl(va, data);
@ -113,6 +126,7 @@ namespace Ryujinx.Cpu
/// <typeparam name="T">Type of the data being written</typeparam>
/// <param name="va">Virtual address to write the data into</param>
/// <param name="value">Data to be written</param>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
public void Write<T>(ulong va, T value) where T : unmanaged
{
Write(va, MemoryMarshal.Cast<T, byte>(MemoryMarshal.CreateSpan(ref value, 1)));
@ -123,6 +137,7 @@ namespace Ryujinx.Cpu
/// </summary>
/// <param name="va">Virtual address to write the data into</param>
/// <param name="data">Data to be written</param>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
public void Write(ulong va, ReadOnlySpan<byte> data)
{
if (data.Length == 0)
@ -130,34 +145,44 @@ namespace Ryujinx.Cpu
return;
}
MarkRegionAsModified(va, (ulong)data.Length);
if (IsContiguous(va, data.Length))
try
{
data.CopyTo(_backingMemory.GetSpan(GetPhysicalAddressInternal(va), data.Length));
}
else
{
int offset = 0, size;
MarkRegionAsModified(va, (ulong)data.Length);
if ((va & PageMask) != 0)
if (IsContiguousAndMapped(va, data.Length))
{
ulong pa = GetPhysicalAddressInternal(va);
size = Math.Min(data.Length, PageSize - (int)(va & PageMask));
data.Slice(0, size).CopyTo(_backingMemory.GetSpan(pa, size));
offset += size;
data.CopyTo(_backingMemory.GetSpan(GetPhysicalAddressInternal(va), data.Length));
}
for (; offset < data.Length; offset += size)
else
{
ulong pa = GetPhysicalAddressInternal(va + (ulong)offset);
int offset = 0, size;
size = Math.Min(data.Length - offset, PageSize);
if ((va & PageMask) != 0)
{
ulong pa = GetPhysicalAddressInternal(va);
data.Slice(offset, size).CopyTo(_backingMemory.GetSpan(pa, size));
size = Math.Min(data.Length, PageSize - (int)(va & PageMask));
data.Slice(0, size).CopyTo(_backingMemory.GetSpan(pa, size));
offset += size;
}
for (; offset < data.Length; offset += size)
{
ulong pa = GetPhysicalAddressInternal(va + (ulong)offset);
size = Math.Min(data.Length - offset, PageSize);
data.Slice(offset, size).CopyTo(_backingMemory.GetSpan(pa, size));
}
}
}
catch (InvalidMemoryRegionException)
{
if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
{
throw;
}
}
}
@ -172,6 +197,7 @@ namespace Ryujinx.Cpu
/// <param name="va">Virtual address of the data</param>
/// <param name="size">Size of the data</param>
/// <returns>A read-only span of the data</returns>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
public ReadOnlySpan<byte> GetSpan(ulong va, int size)
{
if (size == 0)
@ -179,7 +205,7 @@ namespace Ryujinx.Cpu
return ReadOnlySpan<byte>.Empty;
}
if (IsContiguous(va, size))
if (IsContiguousAndMapped(va, size))
{
return _backingMemory.GetSpan(GetPhysicalAddressInternal(va), size);
}
@ -204,6 +230,7 @@ namespace Ryujinx.Cpu
/// <param name="va">Virtual address of the data</param>
/// <param name="size">Size of the data</param>
/// <returns>A writable region of memory containing the data</returns>
/// <exception cref="InvalidMemoryRegionException">Throw for unhandled invalid or unmapped memory accesses</exception>
public WritableRegion GetWritableRegion(ulong va, int size)
{
if (size == 0)
@ -211,7 +238,7 @@ namespace Ryujinx.Cpu
return new WritableRegion(null, va, Memory<byte>.Empty);
}
if (IsContiguous(va, size))
if (IsContiguousAndMapped(va, size))
{
return new WritableRegion(null, va, _backingMemory.GetMemory(GetPhysicalAddressInternal(va), size));
}
@ -234,6 +261,7 @@ namespace Ryujinx.Cpu
/// <typeparam name="T">Type of the data to get the reference</typeparam>
/// <param name="va">Virtual address of the data</param>
/// <returns>A reference to the data in memory</returns>
/// <exception cref="MemoryNotContiguousException">Throw if the specified memory region is not contiguous in physical memory</exception>
public ref T GetRef<T>(ulong va) where T : unmanaged
{
if (!IsContiguous(va, Unsafe.SizeOf<T>()))
@ -256,6 +284,9 @@ namespace Ryujinx.Cpu
return ref _backingMemory.GetRef<T>(GetPhysicalAddressInternal(va));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private bool IsContiguousAndMapped(ulong va, int size) => IsContiguous(va, size) && IsMapped(va);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private bool IsContiguous(ulong va, int size)
{
@ -295,26 +326,36 @@ namespace Ryujinx.Cpu
return;
}
int offset = 0, size;
if ((va & PageMask) != 0)
try
{
ulong pa = GetPhysicalAddressInternal(va);
int offset = 0, size;
size = Math.Min(data.Length, PageSize - (int)(va & PageMask));
if ((va & PageMask) != 0)
{
ulong pa = GetPhysicalAddressInternal(va);
_backingMemory.GetSpan(pa, size).CopyTo(data.Slice(0, size));
size = Math.Min(data.Length, PageSize - (int)(va & PageMask));
offset += size;
_backingMemory.GetSpan(pa, size).CopyTo(data.Slice(0, size));
offset += size;
}
for (; offset < data.Length; offset += size)
{
ulong pa = GetPhysicalAddressInternal(va + (ulong)offset);
size = Math.Min(data.Length - offset, PageSize);
_backingMemory.GetSpan(pa, size).CopyTo(data.Slice(offset, size));
}
}
for (; offset < data.Length; offset += size)
catch (InvalidMemoryRegionException)
{
ulong pa = GetPhysicalAddressInternal(va + (ulong)offset);
size = Math.Min(data.Length - offset, PageSize);
_backingMemory.GetSpan(pa, size).CopyTo(data.Slice(offset, size));
if (_invalidAccessHandler == null || !_invalidAccessHandler(va))
{
throw;
}
}
}
@ -416,6 +457,7 @@ namespace Ryujinx.Cpu
/// </summary>
/// <param name="va">Virtual address to check</param>
/// <returns>True if the address is mapped, false otherwise</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public bool IsMapped(ulong va)
{
if (!ValidateAddress(va))