RFR: 8364212: Shenandoah: Rework archived objects loading [v4]
Aleksey Shipilev
shade at openjdk.org
Wed Jul 30 10:22:14 UTC 2025
> As continuation of [JDK-8293650](https://bugs.openjdk.org/browse/JDK-8293650), we would want to avoid allocating CDS archives as humongous regions and then flipping them back to regular state. This already complicates the region accounting significantly, and was a source a few bugs. We can rework the CDS archive load to cleanly ask collector for a contiguous set of regular regions.
>
> Additional testing:
> - [x] Linux x86_64 server fastdebug, `hotspot_gc_shenandoah`
> - [x] Linux x86_64 server fastdebug, `runtime/cds`
> - [x] Linux x86_64 server fastdebug, `runtime/cds` with `-XX:+UseShenandoahGC`
> - [ ] Linux x86_64 server fastdebug, `all`
Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains seven additional commits since the last revision:
- Merge branch 'master' into JDK-8364212-shenandoah-archived-objs
- Do not fill out the entire regions
- Merge branch 'master' into JDK-8364212-shenandoah-archived-objs
- A bit more verification
- Fix
- Fix
- Regular CDS
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/26510/files
- new: https://git.openjdk.org/jdk/pull/26510/files/1c705291..84a64649
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=26510&range=03
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=26510&range=02-03
Stats: 2817 lines in 130 files changed: 978 ins; 1616 del; 223 mod
Patch: https://git.openjdk.org/jdk/pull/26510.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/26510/head:pull/26510
PR: https://git.openjdk.org/jdk/pull/26510
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