RFR: JDK-8301749: Tracking malloc pooled memory size

[Johan Sjölen]

On Wed, 8 Feb 2023 07:48:55 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> return -1.
> 
> You aim to mimic the malloc_info() API at os:: level, so you should return -1 in case malloc_info failed, including failure do to resolving issues.

Wouldn't that lead to a caller not knowing whether `malloc_info` itself failed or if our wrapper failed? `malloc_info` also sets `errno`. I think it's better if we don't imitate `malloc_info`, by returning `-2` if `malloc_info` is missing, to distinguish the different states.

-------------

PR: https://git.openjdk.org/jdk/pull/12455