[crac] RFR: List open FDs through reading /proc/self/fd [v2]

[Anton Kozlov]

On Thu, 25 May 2023 14:57:44 GMT, Radim Vansa <duke at openjdk.org> wrote:

>> Previously the code was iterating through all possible FD values, up to highest allowed FD number, and required allocation of possibly huge array. Reading /proc/self/fd into a compact array is both more memory efficient and does not require excessive syscalls.
>
> Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Last touches

Thanks!

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Marked as reviewed by akozlov (Lead).

PR Review: https://git.openjdk.org/crac/pull/67#pullrequestreview-1444223762