[jdk18u] RFR: 8283469: Don't use memset to initialize members in FileMapInfo and fix memory leak

[Zhengyu Gu]

On Thu, 12 May 2022 19:53:02 GMT, Paul Hohensee <phh at openjdk.org> wrote:

> The check for _file_open seems to have been imported from another patch. Backport that patch first?

This comes from JDK-8261455, an enhancement CR. It is not a small patch and still has a subtask in progress, I don't think it is proper to backport it at this moment. 

Should I drop the additional lines and leave the file open?

Thanks.

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

PR: https://git.openjdk.java.net/jdk18u/pull/97