RFR: 8267396: Avoid recording "pc" in unhandled oops detector for better performance

[David Holmes]

On Wed, 19 May 2021 12:32:23 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> See the rationale in the bug.
> 
> Additional testing:
>  - [x] Known slow test with `-XX:+CheckUnhandledOops`
>  - [x] tier1 with `-XX:+CheckUnhandledOops`

LGTM2 :)

Thanks,
David

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/4114