public unsafe void DisposeThreadSafety()
{
var nativeBlocks = new NativeHeapMemoryBlock[20];
var memoryMappedBlocks = new MemoryMappedFileBlock[20];
var pinnedObjects = new PinnedObject[20];
for (int i = 0; i < nativeBlocks.Length; i++)
{
nativeBlocks[i] = new NativeHeapMemoryBlock(10);
}
for (int i = 0; i < memoryMappedBlocks.Length; i++)
{
memoryMappedBlocks[i] = new MemoryMappedFileBlock(new TestOnceDisposable(), new TestSafeBuffer(), offset: 0, size: 1);
}
for (int i = 0; i < memoryMappedBlocks.Length; i++)
{
pinnedObjects[i] = new PinnedObject(new byte[4]);
}
var worker = new ThreadStart(() =>
{
for (int k = 0; k < 2; k++)
{
for (int i = 0; i < nativeBlocks.Length; i++)
{
nativeBlocks[i].Dispose();
Thread.Yield();
}
for (int i = 0; i < memoryMappedBlocks.Length; i++)
{
memoryMappedBlocks[i].Dispose();
Thread.Yield();
}
for (int i = 0; i < pinnedObjects.Length; i++)
{
pinnedObjects[i].Dispose();
Thread.Yield();
}
}
});
var t1 = new Thread(worker);
var t2 = new Thread(worker);
var t3 = new Thread(worker);
var t4 = new Thread(worker);
t1.Start();
t2.Start();
t3.Start();
t4.Start();
t1.Join();
t2.Join();
t3.Join();
t4.Join();
}
// internal for testing
internal static unsafe NativeHeapMemoryBlock DecodeEmbeddedPortablePdbDebugDirectoryData(AbstractMemoryBlock block)
{
NativeHeapMemoryBlock?decompressed;
var headerReader = block.GetReader();
if (headerReader.ReadUInt32() != PortablePdbVersions.DebugDirectoryEmbeddedSignature)
{
throw new BadImageFormatException(SR.UnexpectedEmbeddedPortablePdbDataSignature);
}
int decompressedSize = headerReader.ReadInt32();
try
{
decompressed = new NativeHeapMemoryBlock(decompressedSize);
}
catch
{
throw new BadImageFormatException(SR.DataTooBig);
}
bool success = false;
try
{
var compressed = new ReadOnlyUnmanagedMemoryStream(headerReader.CurrentPointer, headerReader.RemainingBytes);
var deflate = new DeflateStream(compressed, CompressionMode.Decompress, leaveOpen: true);
if (decompressedSize > 0)
{
int actualLength;
try
{
#if NETCOREAPP3_0_OR_GREATER
actualLength = deflate.TryReadAll(new Span <byte>(decompressed.Pointer, decompressed.Size));
#else
using var decompressedStream = new UnmanagedMemoryStream(decompressed.Pointer, decompressed.Size, decompressed.Size, FileAccess.Write);
deflate.CopyTo(decompressedStream);
actualLength = (int)decompressedStream.Position;
#endif
}
catch (Exception e)
{
throw new BadImageFormatException(e.Message, e.InnerException);
}
if (actualLength != decompressed.Size)
{
throw new BadImageFormatException(SR.SizeMismatch);
}
}
// Check that there is no more compressed data left,
// in case the decompressed size specified in the header is smaller
// than the actual decompressed size of the data.
if (deflate.ReadByte() != -1)
{
throw new BadImageFormatException(SR.SizeMismatch);
}
success = true;
}
finally
{
if (!success)
{
decompressed.Dispose();
}
}
return(decompressed);
}