public WindowsProcessDataReader()

in src/Microsoft.Diagnostics.Runtime/DataReaders/Windows/WindowsProcessDataReader.cs [30:74]
36 lines of code
11 McCabe index (conditional complexity)

        public WindowsProcessDataReader(int processId, WindowsProcessDataReaderMode mode)
        {
            if (mode == WindowsProcessDataReaderMode.Snapshot)
            {
                _originalPid = processId;

                // Throws InvalidOperationException, which is similar to how Process.Start fails if it can't start the process.
                Process process = Process.GetProcessById(processId);
                int hr = PssCaptureSnapshot(process.Handle, PSS_CAPTURE_FLAGS.PSS_CAPTURE_VA_CLONE, IntPtr.Size == 8 ? 0x0010001F : 0x0001003F, out _snapshotHandle);
                if (hr != 0)
                    throw new InvalidOperationException($"Could not create snapshot to process. Error {hr}.");

                hr = PssQuerySnapshot(_snapshotHandle, PSS_QUERY_INFORMATION_CLASS.PSS_QUERY_VA_CLONE_INFORMATION, out _cloneHandle, IntPtr.Size);
                if (hr != 0)
                    throw new InvalidOperationException($"Could not create snapshot to process. Error {hr}.");

                ProcessId = GetProcessId(_cloneHandle);
            }
            else
            {
                ProcessId = processId;
            }

            _process = WindowsFunctions.NativeMethods.OpenProcess(PROCESS_VM_READ | PROCESS_QUERY_INFORMATION, false, ProcessId);

            if (_process == IntPtr.Zero)
            {
                if (!WindowsFunctions.IsProcessRunning(ProcessId))
                    throw new ArgumentException($"Process {processId} is not running.");

                int hr = Marshal.GetLastWin32Error();
                throw new ArgumentException($"Could not attach to process {processId}, error: {hr:x}");
            }

            using Process p = Process.GetCurrentProcess();
            if (DataTarget.PlatformFunctions.TryGetWow64(p.Handle, out bool wow64)
                && DataTarget.PlatformFunctions.TryGetWow64(_process, out bool targetWow64)
                && wow64 != targetWow64)
            {
                throw new InvalidOperationException("Mismatched architecture between this process and the target process.");
            }

            if (mode == WindowsProcessDataReaderMode.Suspend)
                _suspension = new WindowsThreadSuspender(ProcessId);
        }