public unsafe void WriteChars_VeryLargeArray_DoesNotOverflow()
{
const nuint INT32_OVERFLOW_SIZE = (nuint)int.MaxValue + 3;
SafeBuffer unmanagedBuffer = null;
try
{
try
{
unmanagedBuffer = SafeBufferUtil.CreateSafeBuffer(INT32_OVERFLOW_SIZE * sizeof(byte));
}
catch (OutOfMemoryException)
{
throw new SkipTestException($"Unable to execute {nameof(WriteChars_VeryLargeArray_DoesNotOverflow)} due to OOM"); // skip test in low-mem conditions
}
Assert.True((long)unmanagedBuffer.ByteLength > int.MaxValue);
// reuse same memory for input and output to avoid allocating more memory and OOMs
Span <char> span = new Span <char>((char *)unmanagedBuffer.DangerousGetHandle(), (int)(INT32_OVERFLOW_SIZE / sizeof(char)));
span.Fill('\u0224'); // LATIN CAPITAL LETTER Z WITH HOOK
Stream outStream = new UnmanagedMemoryStream(unmanagedBuffer, 0, (long)unmanagedBuffer.ByteLength, FileAccess.ReadWrite);
BinaryWriter writer = new BinaryWriter(outStream);
writer.Write(span); // will write slightly more than int.MaxValue bytes to the output
Assert.Equal((long)INT32_OVERFLOW_SIZE, outStream.Position);
}
finally
{
unmanagedBuffer?.Dispose();
}
}
protected virtual void Dispose(bool disposing)
{
if (buffer != null)
{
if (disposing)
{
buffer.Dispose();
}
}
buffer = null;
}
private bool disposedValue = false; // 要检测冗余调用
protected virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
if (disposing)
{
_buffer?.Dispose();
_accessor?.Dispose();
_file?.Dispose();
}
disposedValue = true;
}
}
public void Dispose()
{
if (IsDisposed)
{
return;
}
IsDisposed = true;
ScratchBuffer.Dispose();
UploadBuffer.Dispose();
lock (Lock)
ReleaseBindings();
}
private bool disposedValue = false; // To detect redundant calls
private void Dispose(bool disposing)
{
if (!disposedValue && !_properties.IsClosed)
{
disposedValue = true;
if (_providers.Count > 0)
{
foreach (var prov in _providers)
{
Guid provider_id = prov.ProviderId;
Win32NativeMethods.EnableTraceEx2(_handle, ref provider_id,
EventControlCode.DisableProvider, prov.Level, 0, 0, 0, null);
}
}
Win32NativeMethods.ControlTrace(_handle, null,
_properties, EventTraceControl.Stop);
_properties?.Dispose();
}
}
public override void Dispose()
{
mBuffer.Dispose();
mViewAcessor.Dispose();
mFile.Dispose();
}