Unity / C++ Failed Reading from NativeArray on Windows without SafetyHandle

This repo contains an example about the failure to access a native array (a void* memory pointer marshalled to an IntPtr into Unity) on Windows x64 without the use of a safety handle

• Windows 10 (21H1)
• tested with 2019.4.32f1
• used visual studio 2017 and 2019 (newest as of Nov. 11 2021)

Instructions

1. build cpp directory first with cmake and VS17 or VS19. The output of the build will end up directly in the unity assets folder. make sure to build for x64!

2. fire up unity and try to run the sample scene. If you have debugging in VS, you will see that there is a failure to marshal the srcbuf.

3. run without the USEHANDLE flag set - will be unable to read from buffer

4. add #define USEHANDLE at the beginning of TestLoopBack.cs and run again - works like a charm!