Integrated: 8327093: Add truncate function to BitMap API

[Matias Saavedra Silva]

On Fri, 1 Mar 2024 23:14:18 GMT, Matias Saavedra Silva <matsaave at openjdk.org> wrote:

> The BitMap does not currently have a "slice" method which can return a subset of the bitmap defined by a start and end bit. This utility can be used to analyze portions of a bitmap or to overwrite the existing map with a shorter, modified map. 
> 
> This implementation has two core methods: 
> `copy_of_range` allocates and returns a new word array as used internally by BitMap
> `truncate` overwrites the internal array with the one generated by `copy_of_range` so none of the internal workings are exposed to callers outside of BitMap.
> 
> This change is verified with an included test.

This pull request has now been integrated.

Changeset: d74b907d
Author:    Matias Saavedra Silva <matsaave at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/d74b907d206073243437771486c1d62240de3d81
Stats:     289 lines in 3 files changed: 287 ins; 0 del; 2 mod

8327093: Add truncate function to BitMap API

Reviewed-by: aboldtch, iklam

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PR: https://git.openjdk.org/jdk/pull/18092