RFR: 8252173: Use handles instead of jobjects in modules.cpp

[Lois Foltan]

On Mon, 8 Mar 2021 18:45:04 GMT, Harold Seigel <hseigel at openjdk.org> wrote:

> Hi,
> Please review this change for JDK-8252173 to use handles instead of jobjects in modules.cpp to make modules.cpp more debuggable.  The change was tested with Mach5 tiers 1 and 2 on Linux, Mac OS, and Windows, and tiers 3-5 on Linux x64.
> 
> Thanks, Harold

Looks good Harold!

Lois

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Marked as reviewed by lfoltan (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2878