Ownership tracking

[jtschuster]

Builds off of #89139.

Implements AssignOut in unmanaged to managed stubs for parameters that need to be marshaled back to the native caller. The values are marshalled into a local variable, then assigned to the parameter at the end of the method. The local variable is cleaned up in the catch clause before returning, and the parameter value is cleaned up after the try catch before returning successfully.

The code isn't cleaned up, but the diff at https://github.com/jtschuster/GeneratedCode/pull/2/files can help show what the changes do compared to what's in main.

[ghost]

Tagging subscribers to this area: @dotnet/interop-contrib
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Builds off of #89139.

Implements AssignOut in unmanaged to managed stubs for parameters that need to be marshaled back to the native caller. The values are marshalled into a local variable, then assigned to the parameter at the end of the method. The local variable is cleaned up in the catch clause before returning, and the parameter value is cleaned up after the try catch before returning successfully.

The code isn't cleaned up, but the diff at https://github.com/jtschuster/GeneratedCode/pull/2/files can help show what the changes do compared to what's in main.

Author:	jtschuster
Assignees:	-
Labels:	area-System.Runtime.InteropServices
Milestone:	-

[jtschuster]

This is going to look a lot different with the new changes coming in, closing this