[hl/c] stack capture implementation for unix about hashlink HOT 3 OPEN

Any pointers on the lib / API required to do that ?

from hashlink.

libunwind apparently

from hashlink.

Also, quoting @Apprentice-Alchemist

Re HL call stacks: the JIT has a custom unwinder that relies on frame pointers and is mostly platform independent (but this does mean that it can't give very useful stack traces if there's a lot of foreign code involved, since it only knows about functions generated by the JIT)
https://github.com/HaxeFoundation/hashlink/blob/8a63b99eca0825c3a6dc0574e1404ded4c0eaad1/src/module.c#L41-L210HL/C on the other hand uses native apis, but that's only been implemented for Windows.
https://github.com/HaxeFoundation/hashlink/blob/8a63b99eca0825c3a6dc0574e1404ded4c0eaad1/src/hlc_main.c#L58-L94In the short term HL/C can be fixed by implementing the stack trace / symbol resolution stuff for Linux/macOS/etc. using libunwind.
In the long term it may be a good idea to get rid of the custom unwinder in the JIT and switch to libunwind/windows apis to enable more reliable and useful stacktraces when FFI is involved (both libunwind and windows have support for dynamically generated debug information).

from hashlink.