The Java C2 compiler turns Java bytecode into highly optimized native instructions. The process is decomposed in several phases. Knowing the order in which these phases are applied is important for developers interested in modifying Hostpot. In this post I will talk about the phase ordering of the C2 compiler, …
In this post I will be talking about how to make C2 selectively optimize methods based on a newly created annotation. I will also describe the parts of the code that must be modified to implement such feature. Do you need annotations to optimize parts of your code? Annotations are …
In a previous post I wrote about how to build OpenJDK 9. This is cool, but my objective was to mess around with the sources of Hotspot and modify it, so I must have a way to write my changes and debug them. I’m using as main source of reference …
If you ever feel like compiling the OpenJDK 9 in Ubuntu 14 yourself, here is a step by step tutorial. I asume you have already downloaded the source code for the OpenJDK. If you don’t: Install mercurial Download from here the tree extension for mercurial. In case you don’t have it, …