[jdk11u-dev] RFR: 8280550: SplittableRandom#nextDouble(double,double) can return result >= bound [v2]

[Goetz Lindenmaier]

> The original fix patches jdk/internal/util/random/RandomSupport.java.
> This class is not in 11.
> 
> The Random code was completely reworked by
> "8248862: Implement Enhanced Pseudo-Random Number Generators"
> In the old 11 code there are several methods 'nextDouble' or
> 'internalNextDouble' all using the same pattern.  They were
> replaced by the implementation in the new class
> RandomSupport in 17.
> 
> I adapted the following methods:
> in java/util/Random.java:
>   final double internalNextDouble(double origin, double bound)
> 
> in java/util/SplittableRandom.java
>   final double internalNextDouble(double origin, double bound)
>   public double nextDouble(double bound)
> 
> in java/util/concurrent/ThreadLocalRandom.java
>   final double internalNextDouble(double origin, double bound)
>   public double nextDouble(double bound)
> 
> I think this are all affected methods, but please double-check.
> 
> The change requires follow-up 8280950 which needs to be
> adapted to touch the three internalNextDouble()
> methods.

Goetz Lindenmaier has updated the pull request incrementally with one additional commit since the last revision:

  Add Test forgotten in orig commit.

-------------

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/1478/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/1478/files/d43bf1d1..e884b536

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1478&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1478&range=00-01

  Stats: 52 lines in 1 file changed: 52 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1478.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1478/head:pull/1478

PR: https://git.openjdk.org/jdk11u-dev/pull/1478