RFR: 8365256: RelocIterator should use indexes instead of pointers [v2]
Johan Sjölen
jsjolen at openjdk.org
Mon Aug 18 09:47:15 UTC 2025
> Hi,
>
> This PR replaces the `current` and `end` pointers with a `base` pointer alongside a `current` index and a `len`. This allows us to have `-1` as the initial value for current, while retaining `nullptr` as the 'dead' value for `_mutable_data`.
>
> Performance testing shows no difference/performance improvements on DaCapo Linux x64. I don't think that these are actual improvements, but at least there are no clear regressions.
>
> Testing: GHA
Johan Sjölen has updated the pull request incrementally with two additional commits since the last revision:
- Good catch by Vladimir
- Vladimir's comments
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/26569/files
- new: https://git.openjdk.org/jdk/pull/26569/files/c5ea4184..e71b4924
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=26569&range=01
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=26569&range=00-01
Stats: 7 lines in 3 files changed: 3 ins; 2 del; 2 mod
Patch: https://git.openjdk.org/jdk/pull/26569.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/26569/head:pull/26569
PR: https://git.openjdk.org/jdk/pull/26569
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