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I'm trying to setup an environment in which I would be able to change the Hotspot vm GC source code. I cloned the jdk8 repository as instructed here: http://openjdk.java.net/projects/jdk8/ and after a lot of effort succedded in compiling the whole project (including the hotspot project).

I have all the compilation results in a release folder, but couldn't find any executable or any other way to run\use the hotspot vm.

Does someone maybe had a similar experience with this project and can help me figure this out? Thanks very much

Ofir Gordon
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1 Answers1

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According to the OpenJDK 8 build instructions:

When the build is completed, you should see the generated binaries and associated files in the j2sdk-image directory in the output directory. In particular, the build/*/images/j2sdk-image/bin directory should contain executables for the OpenJDK tools and utilities for that configuration.

Stephen C
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  • Thanks. I saw that comment, this directory has many files and I didn't find any instructions that explain how to run any of them, and particularly the hotspot vm. Do you have any idea how to use the hotspot vm specificaly? – Ofir Gordon Feb 22 '20 at 11:24
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    Most of the executables use the JVM (i.e. Hotspot), but the `java` command is probably what you mean. Run `java -version`. – Stephen C Feb 22 '20 at 14:01
  • This folder has many java related executable files, non of them seems related to the hotspot vm. When running `java -version` I get the following output: _openjdk version "1.8.0-internal", openjdk Runtime Environment (build-1.8.0-internal), openjdk 64-Bit Server VM (build 25.0-b70, mixed mode)_ Nothing that indicates a use of the specific vm that runs the hotspot code. Any idea what file to look for maybe? – Ofir Gordon Feb 23 '20 at 15:38
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    You seem to be under the impression that there is (or should be) a separate "hotspot" executable in a Java JRE or JDK (Oracle or OpenJDK). There isn't. The `java` command is it. – Stephen C Feb 23 '20 at 22:58