JDK-8252584 : HotSpot Style Guide should permit alignas
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: other
  • Affected Version: 16
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2020-08-31
  • Updated: 2022-12-05
  • Resolved: 2022-11-30
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JDK 20
20 b26Fixed
Related Reports
Blocks :  
JDK-8250269 - Replace ATTRIBUTE_ALIGNED with alignas
Relates :  
JDK-8297912 - HotSpot Style Guide should permit alignas (Second Proposal Attempt)
Relates :  
JDK-8297852 - Backout 8252584 for the time being
Description
Add alignas to the permitted features set, but only for variables, not for classes.  Classes have the problem that dynamic allocation is unaware of alignment restrictions.  (That's fixed in C++17.  Though we might be able to add it ourselves for our allocators.)
Comments
Changeset: 22f5d014 Author: Julian Waters <jwaters@openjdk.org> Date: 2022-11-30 07:37:22 +0000 URL: https://git.openjdk.org/jdk/commit/22f5d014287a5cae2c0503ab3f9730f64725605a
30-11-2022
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/11404 Date: 2022-11-29 01:03:55 +0000
29-11-2022
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/11315 Date: 2022-11-23 10:24:42 +0000
23-11-2022
Has there been any recent discussion regarding this yet? Unlike the issues with C++ attributes brought up in JDK-8295146, this is a relatively less disruptive change with less detrimental code impact on HotSpot as a whole
18-11-2022