Recent Posts by Joe Darcy

With the call for papers for JavaOne 2009 out, I thought it was high time to belatedly publish the slides for my JavaOne 2008 bofTips and Tricks for Using Language Features in API Design and Implementation. The session feedback from attendees of my talk was consistent on there being too much material gone over too rapidly. So if I revisit presenting this material in the future, I plan to split the talk in two, one part on kinds of compatibility and another more focused on...

For regression testing of OpenJDK 6, the big news inb13 is due to work by Jon on multiple fronts; by getting out a new version ofjtreg and developing a number of test fixes, all the langtools regression tests now pass when run in "samevm" mode (jtreg -s ...). As the name implies, in same vm mode a test is run in the same jvm as the previous test as opposed to starting a fresh jvm for each test, giving much speedier test results. The base jtreg flags for these test runs were -a ...

On November 7, the OpenJDK 6 b13 source bundle was published. Changes of note in this build: In the langtools area, besides a few miscellaneous bug fixes ( title="Normalized whitespace of langtools area for OpenJDK 6">6760834, title="javac returns incorrect value for lastModifiedTime() when source is a zip file archive">6725036, title="javac 1.6.0 fails to compile class with inner class">6657499), all the langtools regression tests now pass out of the box (title="tools/javac/v...

To address some of the questions that have come up recently in comments and elsewhere, I've prepared a diagram of OpenJDK 6's genealogy: alt="JDK Release Genealogy" title="JDK Release Genealogy"> The original JDK 6 code base begat two lines of heirs: JDK 7 and the sequence of 6 update releases. The decision to open source the JDK code base came late in the life cycle of the development of JDK 6 so a build of JDK 7 was the first be published as open source. By the time JDK 7...

There have been a number of inquiries about when the various new features of 6u10 would be available in OpenJDK. OpenJDK 6 build 12 contained ports of bug fixes from a number of 6u10 component areas (corba, jaxp, jaxws, langtools). Most changes from the core jdk component area of 6u10 were not ported. The porting effort that took place of a relatively small number of bugs to a subset of the full OpenJDK code base was still a sizeable effort. The full set of changes made to the...

I was heartened to recently come across the article Java's new math, Part 1: Real numbers which detailed some of the additions I made to Java's math libraries over the years in JDK 5 and 6, including title="Add hyperbolic transcendental functions (sinh, cosh, tanh) to Java math library">hyperbolic trigonometric functions (sinh, cosh, tanh), title="Want Math.cbrt() function for cube root">cube root, and title="Math package: implement log10 (base 10 logarithm)">base-10 log. A...

A large fraction of my work for OpenJDK 6 build 12 was porting all of the cumulative fixes in selected areas of the 6u10 code base into OpenJDK 6. Internally, like the forest of Mercurial repositories of JDK 7, the code base of OpenJDK 6 is composed of a set of teamware workspaces for different areas: cobra, hotspot, jaxp, jaxws, jdk, and langtools. Previously, the non-HotSpot code lived in a single "j2se" workspace which was split as part of the JDK 7 transition to...

Running with jtreg flags -a -ignore:quiet, the basic regression test results on Linux for OpenJDK 6 build 12 are: HotSpot, 5 tests pass. Langtools, 1,346 tests pass, 2 tests fail. JDK, 2,985 tests pass, 36 tests fail, 4 tests have errors. For langtools, from the previous build a few new (passing) tests were added and @ignore tests were really ignored; using jtdiff, part of the jtreg package to compute the differences of the tests results: 0: ./b11-langtools/summary.txt pass:...

On September 12, the OpenJDK 6 b12 source bundle was published. Changes of note in this build: An updated version of Gervill is included ( title="Update Gervill with post 1.0 fixes">6717691, title="Update Gervill with more post 1.0 fixes">6740210). Functionality of several IcedTea patches which correct JCK failures have been applied ( title="Apply IcedTea Color.createContext patch">6735154, title="Apply IcedTea little cms patches">6733501). I've ported fixes from the...