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  1. JDK
  2. JDK-8078672

Print and allow setting by Java property seeds used to initialize Random instances in java.lang numerics tests

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    • b63

    Backports

      Description

        The tests listed below use an instance of Random initialized as

        Random prng = new Random();

        and do not print the seed as this is in any case impossible to obtain from an instance so created. The suggested fix is create the Random instance in a manner which allows the seed to be printed. A second part of the fix is to allow setting the seed via a Java property such as

        -Dseed=42

         which would be useful in debugging a failure should one occur.

        The affected tests are

        test/java/lang/Double/ParseHexFloatingPoint.java
        test/java/lang/Integer/BitTwiddle.java
        test/java/lang/Long/BitTwiddle.java test/java/lang/RandomSeedFactory.java
        test/java/lang/Math/CubeRootTests.java
        test/java/lang/Math/HypotTests.java
        test/java/lang/Math/IeeeRecommendedTests.java
        test/java/lang/Math/Log1pTests.java

        Note that there are a few other numerics tests under java.lang which use Random with a hard-coded seed of zero and these do not need to be addressed by this issue.

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8084828 Print and allow setting by Java property seeds used to initialize Random instances in java.lang numerics tests

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8079107 Update TestKeyPairGenerator.java to use random number generator library

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8079419 Update to RegEx test to use random number library

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8079782 RandomFactory should be in the jdk.testlibrary package

            • P3 - Major loss of function.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-8078586 java/lang/Double/ParseHexFloatingPoint.java fails intermittently

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8074460 Always print seeds used in [Splittable]Random instances in java.math tests

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-8080658 Update sun/nio/cs/FindDecoderBugs.java to use random number generator library

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed

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                bpb Brian Burkhalter
                bpb Brian Burkhalter
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