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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Reflection.Internal;
using System.Text;
using Xunit;
namespace System.Reflection.Metadata.Tests
{
public class BlobReaderTests
{
[Fact]
public unsafe void PublicBlobReaderCtorValidatesArgs()
{
byte* bufferPtrForLambda;
byte[] buffer = new byte[4] { 0, 1, 0, 2 };
fixed (byte* bufferPtr = buffer)
{
bufferPtrForLambda = bufferPtr;
Assert.Throws<ArgumentOutOfRangeException>(() => new BlobReader(bufferPtrForLambda, -1));
}
Assert.Throws<ArgumentNullException>(() => new BlobReader(null, 1));
Assert.Equal(0, new BlobReader(null, 0).Length); // this is valid
Assert.Throws<BadImageFormatException>(() => new BlobReader(null, 0).ReadByte()); // but can't read anything non-empty from it...
Assert.Same(String.Empty, new BlobReader(null, 0).ReadUtf8NullTerminated()); // can read empty string.
}
[Fact]
public unsafe void ReadBoolean1()
{
byte[] buffer = new byte[] { 1, 0xff, 0, 2 };
fixed (byte* bufferPtr = buffer)
{
var reader = new BlobReader(new MemoryBlock(bufferPtr, buffer.Length));
Assert.True(reader.ReadBoolean());
Assert.True(reader.ReadBoolean());
Assert.False(reader.ReadBoolean());
Assert.True(reader.ReadBoolean());
}
}
[Fact]
public unsafe void ReadFromMemoryReader()
{
byte[] buffer = new byte[4] { 0, 1, 0, 2 };
fixed (byte* bufferPtr = buffer)
{
var reader = new BlobReader(new MemoryBlock(bufferPtr, buffer.Length));
Assert.False(reader.TrySeekOffset(-1));
Assert.False(reader.TrySeekOffset(Int32.MaxValue));
Assert.False(reader.TrySeekOffset(Int32.MinValue));
Assert.False(reader.TrySeekOffset(buffer.Length));
Assert.True(reader.TrySeekOffset(buffer.Length - 1));
Assert.True(reader.TrySeekOffset(0));
Assert.Equal(0, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadUInt64());
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(1));
Assert.Equal(1, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadDouble());
Assert.Equal(1, reader.Offset);
Assert.True(reader.TrySeekOffset(2));
Assert.Equal(2, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadUInt32());
Assert.Equal((ushort)0x0200, reader.ReadUInt16());
Assert.Equal(4, reader.Offset);
Assert.True(reader.TrySeekOffset(2));
Assert.Equal(2, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadSingle());
Assert.Equal(2, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Equal(9.404242E-38F, reader.ReadSingle());
Assert.Equal(4, reader.Offset);
Assert.True(reader.TrySeekOffset(3));
Assert.Equal(3, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadUInt16());
Assert.Equal((byte)0x02, reader.ReadByte());
Assert.Equal(4, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Equal("\u0000\u0001\u0000\u0002", reader.ReadUTF8(4));
Assert.Equal(4, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Throws<BadImageFormatException>(() => reader.ReadUTF8(5));
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Throws<BadImageFormatException>(() => reader.ReadUTF8(-1));
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Equal("\u0100\u0200", reader.ReadUTF16(4));
Assert.Equal(4, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Throws<BadImageFormatException>(() => reader.ReadUTF16(5));
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Throws<BadImageFormatException>(() => reader.ReadUTF16(-1));
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Throws<BadImageFormatException>(() => reader.ReadUTF16(6));
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Equal(buffer, reader.ReadBytes(4));
Assert.Equal(4, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Same(String.Empty, reader.ReadUtf8NullTerminated());
Assert.Equal(1, reader.Offset);
Assert.True(reader.TrySeekOffset(1));
Assert.Equal("\u0001", reader.ReadUtf8NullTerminated());
Assert.Equal(3, reader.Offset);
Assert.True(reader.TrySeekOffset(3));
Assert.Equal("\u0002", reader.ReadUtf8NullTerminated());
Assert.Equal(4, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Same(String.Empty, reader.ReadUtf8NullTerminated());
Assert.Equal(1, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Throws<BadImageFormatException>(() => reader.ReadBytes(5));
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Throws<BadImageFormatException>(() => reader.ReadBytes(Int32.MinValue));
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Throws<BadImageFormatException>(() => reader.GetMemoryBlockAt(-1, 1));
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Throws<BadImageFormatException>(() => reader.GetMemoryBlockAt(1, -1));
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(0));
Assert.Equal(3, reader.GetMemoryBlockAt(1, 3).Length);
Assert.Equal(0, reader.Offset);
Assert.True(reader.TrySeekOffset(3));
reader.ReadByte();
Assert.Equal(4, reader.Offset);
Assert.Equal(4, reader.Offset);
Assert.Equal(0, reader.ReadBytes(0).Length);
Assert.Equal(4, reader.Offset);
int value;
Assert.False(reader.TryReadCompressedInteger(out value));
Assert.Equal(BlobReader.InvalidCompressedInteger, value);
Assert.Equal(4, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadCompressedInteger());
Assert.Equal(4, reader.Offset);
Assert.Equal(SerializationTypeCode.Invalid, reader.ReadSerializationTypeCode());
Assert.Equal(4, reader.Offset);
Assert.Equal(SignatureTypeCode.Invalid, reader.ReadSignatureTypeCode());
Assert.Equal(4, reader.Offset);
Assert.Equal(default(EntityHandle), reader.ReadTypeHandle());
Assert.Equal(4, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadBoolean());
Assert.Equal(4, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadByte());
Assert.Equal(4, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadSByte());
Assert.Equal(4, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadUInt32());
Assert.Equal(4, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadInt32());
Assert.Equal(4, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadUInt64());
Assert.Equal(4, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadInt64());
Assert.Equal(4, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadSingle());
Assert.Equal(4, reader.Offset);
Assert.Throws<BadImageFormatException>(() => reader.ReadDouble());
Assert.Equal(4, reader.Offset);
}
byte[] buffer2 = new byte[8] { 1, 2, 3, 4, 5, 6, 7, 8 };
fixed (byte* bufferPtr2 = buffer2)
{
var reader = new BlobReader(new MemoryBlock(bufferPtr2, buffer2.Length));
Assert.Equal(reader.Offset, 0);
Assert.Equal(0x0807060504030201UL, reader.ReadUInt64());
Assert.Equal(reader.Offset, 8);
reader.Reset();
Assert.Equal(reader.Offset, 0);
Assert.Equal(0x0807060504030201L, reader.ReadInt64());
reader.Reset();
Assert.Equal(reader.Offset, 0);
Assert.Equal(BitConverter.ToDouble(buffer2, 0), reader.ReadDouble());
}
}
[Fact]
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(0xFFFF, block.PeekReference(0, smallRefSize: true));
Assert.Equal(0xFFFF, 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.
Assert.Throws<BadImageFormatException>(() => block.PeekReference(0, smallRefSize: false));
Assert.Throws<BadImageFormatException>(() => block.PeekReference(4, smallRefSize: false));
// 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
Assert.Throws<BadImageFormatException>(() => block.PeekReference(7, smallRefSize: true));
Assert.Throws<BadImageFormatException>(() => block.PeekReference(5, smallRefSize: false));
}
}
[Fact]
public unsafe void ReadFromMemoryBlock()
{
byte[] buffer = new byte[4] { 0, 1, 0, 2 };
fixed (byte* bufferPtr = buffer)
{
var block = new MemoryBlock(bufferPtr, buffer.Length);
Assert.Throws<BadImageFormatException>(() => block.PeekUInt32(Int32.MaxValue));
Assert.Throws<BadImageFormatException>(() => block.PeekUInt32(-1));
Assert.Throws<BadImageFormatException>(() => block.PeekUInt32(Int32.MinValue));
Assert.Throws<BadImageFormatException>(() => block.PeekUInt32(4));
Assert.Throws<BadImageFormatException>(() => block.PeekUInt32(1));
Assert.Equal(0x02000100U, block.PeekUInt32(0));
Assert.Throws<BadImageFormatException>(() => block.PeekUInt16(Int32.MaxValue));
Assert.Throws<BadImageFormatException>(() => block.PeekUInt16(-1));
Assert.Throws<BadImageFormatException>(() => block.PeekUInt16(Int32.MinValue));
Assert.Throws<BadImageFormatException>(() => block.PeekUInt16(4));
Assert.Equal(0x0200, block.PeekUInt16(2));
int bytesRead;
MetadataStringDecoder stringDecoder = MetadataStringDecoder.DefaultUTF8;
Assert.Throws<BadImageFormatException>(() => block.PeekUtf8NullTerminated(Int32.MaxValue, null, stringDecoder, out bytesRead));
Assert.Throws<BadImageFormatException>(() => block.PeekUtf8NullTerminated(-1, null, stringDecoder, out bytesRead));
Assert.Throws<BadImageFormatException>(() => block.PeekUtf8NullTerminated(Int32.MinValue, null, stringDecoder, out bytesRead));
Assert.Throws<BadImageFormatException>(() => block.PeekUtf8NullTerminated(5, null, stringDecoder, out bytesRead));
Assert.Throws<BadImageFormatException>(() => block.GetMemoryBlockAt(-1, 1));
Assert.Throws<BadImageFormatException>(() => block.GetMemoryBlockAt(1, -1));
Assert.Throws<BadImageFormatException>(() => block.GetMemoryBlockAt(0, -1));
Assert.Throws<BadImageFormatException>(() => block.GetMemoryBlockAt(-1, 0));
Assert.Throws<BadImageFormatException>(() => block.GetMemoryBlockAt(-Int32.MaxValue, Int32.MaxValue));
Assert.Throws<BadImageFormatException>(() => block.GetMemoryBlockAt(Int32.MaxValue, -Int32.MaxValue));
Assert.Throws<BadImageFormatException>(() => block.GetMemoryBlockAt(Int32.MaxValue, Int32.MaxValue));
Assert.Throws<BadImageFormatException>(() => block.GetMemoryBlockAt(block.Length, -1));
Assert.Throws<BadImageFormatException>(() => block.GetMemoryBlockAt(-1, block.Length));
Assert.Equal("\u0001", block.PeekUtf8NullTerminated(1, null, stringDecoder, out bytesRead));
Assert.Equal(bytesRead, 2);
Assert.Equal("\u0002", block.PeekUtf8NullTerminated(3, null, stringDecoder, out bytesRead));
Assert.Equal(bytesRead, 1);
Assert.Equal("", block.PeekUtf8NullTerminated(4, null, stringDecoder, out bytesRead));
Assert.Equal(bytesRead, 0);
byte[] helloPrefix = Encoding.UTF8.GetBytes("Hello");
Assert.Equal("Hello\u0001", block.PeekUtf8NullTerminated(1, helloPrefix, stringDecoder, out bytesRead));
Assert.Equal(bytesRead, 2);
Assert.Equal("Hello\u0002", block.PeekUtf8NullTerminated(3, helloPrefix, stringDecoder, out bytesRead));
Assert.Equal(bytesRead, 1);
Assert.Equal("Hello", block.PeekUtf8NullTerminated(4, helloPrefix, stringDecoder, out bytesRead));
Assert.Equal(bytesRead, 0);
}
}
[Fact]
public unsafe void IndexOf()
{
byte[] buffer = new byte[]
{
0xF0, 0x90, 0x8D,
};
fixed (byte* bufferPtr = buffer)
{
var reader = new BlobReader(bufferPtr, buffer.Length);
Assert.Equal(0, reader.IndexOf(0xF0));
Assert.Equal(1, reader.IndexOf(0x90));
Assert.Equal(2, reader.IndexOf(0x8D));
Assert.Equal(-1, reader.IndexOf(0x8C));
Assert.Equal(-1, reader.IndexOf(0));
Assert.Equal(-1, reader.IndexOf(0xff));
reader.ReadByte();
Assert.Equal(-1, reader.IndexOf(0xF0));
Assert.Equal(0, reader.IndexOf(0x90));
Assert.Equal(1, reader.IndexOf(0x8D));
reader.ReadByte();
Assert.Equal(-1, reader.IndexOf(0xF0));
Assert.Equal(-1, reader.IndexOf(0x90));
Assert.Equal(0, reader.IndexOf(0x8D));
reader.ReadByte();
Assert.Equal(-1, reader.IndexOf(0xF0));
Assert.Equal(-1, reader.IndexOf(0x90));
Assert.Equal(-1, reader.IndexOf(0x8D));
}
}
}
}
|
