public unsafe void ValidatePeekReferenceSize()
{
byte[] buffer = new byte[8] {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01
};
fixed(byte *bufferPtr = buffer)
{
var block = new MemoryBlock(bufferPtr, buffer.Length);
// small ref size always fits in 16 bits
Assert.Equal(0xFFFFU, block.PeekReference(0, smallRefSize: true));
Assert.Equal(0xFFFFU, block.PeekReference(4, smallRefSize: true));
Assert.Equal(0xFFFFU, block.PeekTaggedReference(0, smallRefSize: true));
Assert.Equal(0xFFFFU, block.PeekTaggedReference(4, smallRefSize: true));
Assert.Equal(0x01FFU, block.PeekTaggedReference(6, smallRefSize: true));
// large ref size throws on > RIDMask when tagged variant is not used.
AssertEx.Throws <BadImageFormatException>(() => block.PeekReference(0, smallRefSize: false), MetadataResources.RowIdOrHeapOffsetTooLarge);
AssertEx.Throws <BadImageFormatException>(() => block.PeekReference(4, smallRefSize: false), MetadataResources.RowIdOrHeapOffsetTooLarge);
// large ref size does not throw when Tagged variant is used.
Assert.Equal(0xFFFFFFFFU, block.PeekTaggedReference(0, smallRefSize: false));
Assert.Equal(0x01FFFFFFU, block.PeekTaggedReference(4, smallRefSize: false));
// bounds check applies in all cases
AssertEx.Throws <BadImageFormatException>(() => block.PeekReference(7, smallRefSize: true), MetadataResources.OutOfBoundsRead);
AssertEx.Throws <BadImageFormatException>(() => block.PeekReference(5, smallRefSize: false), MetadataResources.OutOfBoundsRead);
}
}
internal EntityHandle GetParent(CustomDebugInformationHandle handle)
{
int rowOffset = (handle.RowId - 1) * RowSize;
return(HasCustomDebugInformationTag.ConvertToHandle(Block.PeekTaggedReference(rowOffset + ParentOffset, _isHasCustomDebugInformationRefSizeSmall)));
}