RFR: 8259713: Fix comments and ResetNoHandleMark in deoptimization

[Daniel D.Daugherty]

On Wed, 13 Jan 2021 21:12:34 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> This is a small part of the withdrawn change for https://github.com/openjdk/jdk/pull/1990 to fix the out-of-date comments in deoptimization.cpp.
> Tested with tier1-3.

src/hotspot/share/runtime/deoptimization.cpp line 693:

> 691:   // Handles will be leaked.
> 692:   ResetNoHandleMark rnhm;
> 693:   HandleMark hm(thread);

Here's a simpler rewrite for L687 -> L693:

    // This code wants to allocate handles which is okay in a leaf method,
    // but JRT_LEAF contains a NoHandleMark so we have to work around
    // that with ResetNoHandleMark in order to create a HandleMark here:
    ResetNoHandleMark rnhm;
    HandleMark hm(thread);

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

PR: https://git.openjdk.java.net/jdk/pull/2069