[C API] Memory leak

[rt21q8]

Describe the bug

When whole wasmer related cleanup calls are done, not whole memory is released. This scenario can be also observed on slightly modified example files contained in this repository. Details described below. Is this known/expected behavior?

$ echo "`wasmer -V` | `rustc -V` | `uname -m`"
wasmer 3.1.0 | rustc 1.63.0 (4b91a6ea7 2022-08-08) | x86_64

Steps to reproduce

1. Go to lib/c-api/examples.
2. Put all logic from main function into infinite while loop for example files like wasi.c or imports-exports.c or exports-function.c.
3. Rebuild modified examples.
4. Run new executables.
5. Observe memory usage for started process in tool like top.

Expected behavior

Memory usage should not keep growing continuously (there is cleanup logic at the end of main/loop - are these all required calls?).

Actual behavior

Memory keeps growing.

Additional context

[ptitSeb]

I think this has been fixed now, on master, with latest Instance memory leak. Can you check again and see if you still see memory leak?

[rt21q8]

It's still reproducible on both master branch and v3.1.1.

[ptitSeb]

oh, ok. So it's another leak. Thanks for the testing, I'll investigate on this later.

[EclesioMeloJunior]

hello! @ptitSeb I would like to mention that I've posted this issue wasmerio/wasmer-go#393 on wasmer-go repository where I try to explain a memory leak I am facing that may be related to wasmer-c-api.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

Feel free to reopen the issue if it has been closed by mistake.