RFR(M): 8044186 Introduce a reproducible random generator

[Sergei Kovalev]

Update: http://cr.openjdk.java.net/~vlivanov/kovalev/8044186/webrev.03/

Added new testcase test/testlibrary_tests/RandomGeneratorTest.java that 
verify correctness of work for Utils.getRandomInstance() method.

On 24.09.2014 13:09, Sergei Kovalev wrote:
> 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,
Sergei