RFR(M): 8044186 Introduce a reproducible random generator

Sergei Kovalev sergei.kovalev at oracle.com
Wed Sep 24 09:09:36 UTC 2014

Update: http://cr.openjdk.java.net/~vlivanov/kovalev/8044186/webrev.02/

Added new test.
Fixed misprint.

On 24.09.2014 12:50, Vladimir Ivanov wrote:
> Sergei,
> Please, update recently introduced test/compiler/unsafe/UnsafeRaw.java.
> Best regards,
> Vladimir Ivanov
> On 9/23/14, 7:04 PM, Sergei Kovalev wrote:
>> Hello all,
>> Looking for volunteers for review.
>> I'm working for CR https://bugs.openjdk.java.net/browse/JDK-8044186 that
>> submitted against tests.
>> There's the several tests which use randomly generated numbers. It's
>> needed to introduce a way that provide a common manner to reproduce the
>> same random sequence, set seed.
>> There are two possible way to provide seed value:
>> - system property
>> - command line arguments.
>> I chose system property to provide seed value because it could be
>> obtained in any part of code without additional effort. In case passing
>> seed value as command line argument we have to introduce additional
>> logic (and unwanted code) to pass this value in appropriate method.
>> I introduced factory method getRandomInstance in the file Utility.java
>> and make reference to this method in all applicable tests.
>> There is other utility class: Verifier.java. It used in several other
>> testcases from test/compiler/intrinsics/mathexact/ package. Therefore
>> many files contains modifications only for jtreg annotations.
>> I've tested all related tests locally. All tests passed and seed value
>> printed to the logs.
>> links:
>> bug: https://bugs.openjdk.java.net/browse/JDK-8044186
>> webrev: http://cr.openjdk.java.net/~vlivanov/kovalev/8044186/webrev.01/

With best regards,

More information about the hotspot-compiler-dev mailing list