RFR: 8330027: Identity hashes of archived objects must be based on a reproducible random seed [v4]
Thomas Stuefe
stuefe at openjdk.org
Wed May 1 11:37:20 UTC 2024
> CDS archive contains archived objects with identity hashes.
>
> These hashes are deliberately preserved or even generated during dumping. They are generated based on a seed that is initialized randomly on a per-thread basis. These generations precede CDS dump initialization, so they are not affected by the init_random call there, nor would they be affected by [JDK-8323900](https://bugs.openjdk.org/browse/JDK-8323900).
>
> A random seed will not work for dumping archives since it prevents reproducible archive generation. Therefore, when dumping, these seeds must be initiated in a reproducible way.
Thomas Stuefe has updated the pull request incrementally with 259 additional commits since the last revision:
- rework
- 8318682: SA decoding of scalar replaced objects is broken
Reviewed-by: cjplummer, cslucas
- 8331207: Misleading example in DateFormat#parse docs
Reviewed-by: naoto
- 8329223: Parallel: Parallel GC resizes heap even if -Xms = -Xmx
Reviewed-by: ayang, gli
- 8331252: C2: MergeStores: handle negative shift values
Reviewed-by: kvn, shade
- 8327647: Occasional SIGSEGV in markWord::displaced_mark_helper() for SPECjvm2008 sunflow
Reviewed-by: coleenp, fyang, dlong
- 8326742: Change compiler tests without additional VM flags from @run driver to @run main
Reviewed-by: kvn, thartmann, chagedorn
- 8329138: Convert JFR FileForceEvent to static mirror event
Reviewed-by: alanb, egahlin
- 8331346: Update PreviewFeature of STREAM_GATHERERS to JEP-473
Reviewed-by: pminborg, alanb
- 8331410: Remove unused MemAllocator::mem_allocate_inside_tlab
Reviewed-by: tschatzl, gli
- ... and 249 more: https://git.openjdk.org/jdk/compare/192c3f81...45ee254c
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/18735/files
- new: https://git.openjdk.org/jdk/pull/18735/files/192c3f81..45ee254c
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=18735&range=03
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=18735&range=02-03
Stats: 78107 lines in 2220 files changed: 35219 ins; 34213 del; 8675 mod
Patch: https://git.openjdk.org/jdk/pull/18735.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/18735/head:pull/18735
PR: https://git.openjdk.org/jdk/pull/18735
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