OpenJDK Cookbook

Book Image

OpenJDK Cookbook

Book Image

OpenJDK Cookbook

Overview of this book

OpenJDK Cookbook

OpenJDK Cookbook

Credits

About the Authors

About the Authors

About the Reviewers

About the Reviewers

www.PacktPub.com

www.PacktPub.com

Preface

Free Chapter

Getting Started with OpenJDK

Getting Started with OpenJDK

Distinguishing OpenJDK from Oracle JDK

Installing OpenJDK on Windows

Configuring OpenJDK on Windows

Installing OpenJDK on Linux

Configuring OpenJDK on Linux

Navigating through OpenJDK groups and projects

Building OpenJDK 6

Building OpenJDK 6

Preparing CA certificates

Building OpenJDK 6 on Ubuntu Linux 12.04 LTS

Setting up the minimum build environment for the most compatible Linux builds

Installing Cygwin for Windows builds

Building 32-bit FreeType libraries for OpenJDK 6 on Windows

Building 64-bit FreeType libraries for OpenJDK 6 on Windows

Building 32-bit OpenJDK 6 on Windows 7 SP1

Building 64-bit OpenJDK 6 on Windows 7 x64 SP1

Building OpenJDK 7

Building OpenJDK 7

Building OpenJDK 7 on Ubuntu Linux 12.04 LTS

Building OpenJDK 7 on Mac OS X

Building 32-bit FreeType libraries for OpenJDK 7 on Windows

Building 64-bit FreeType libraries for OpenJDK 7 on Windows

Building 32-bit OpenJDK 7 on Windows 7 SP1

Building 64-bit OpenJDK 7 on Windows 7 x64 SP1

Preparing a standalone toolchain for 32- and 64-bit Windows' builds

Building OpenJDK 8

Building OpenJDK 8

Working with GNU Autoconf

Building OpenJDK 8 Ubuntu Linux 12.04 LTS

Using ccache to speed up the OpenJDK 8 build process

Building OpenJDK 8 on Mac OS X

Building OpenJDK 8 on Windows 7 SP1

Building IcedTea

Building IcedTea

Building IcedTea 6

Building IcedTea 7

Building OpenJDK 7 with IcedTea patches

Building IcedTea 7 with the NSS security provider

Building IcedTea 6 with the SystemTap support

Building IcedTea with Other VM Implementations

Building IcedTea with Other VM Implementations

Configuring cross-compilation between ARM and x86

Building IcedTea for ARM with integrated CACAO VM

Porting JamVM to use OpenJDK

Configuring Zero-assembler with the Shark compiler to use OpenJDK

Building for MIPS and other architectures using OpenEmbedded recipes

Working with WebStart and the Browser Plugin

Working with WebStart and the Browser Plugin

Building the IcedTea browser plugin on Linux

Using the IcedTea Java WebStart implementation on Linux

Preparing the IcedTea Java WebStart implementation for Mac OS X

Preparing the IcedTea Java WebStart implementation for Windows

Hacking OpenJDK

Hacking OpenJDK

Setting up the development environment with NetBeans

Working with Mercurial forest

Understanding OpenJDK 6 and 7 incremental builds

Debugging Java code using NetBeans

Debugging C++ code using NetBeans

Using NetBeans to compile HotSpot

Using HotSpot dev parameters

Adding new intrinsic to HotSpot

Building VisualVM from the source code

Creating a plugin for VisualVM

Getting benefits from the AdoptOpenJDK project

Testing OpenJDK

Testing OpenJDK

Running tests using the downloaded or the built version of jtreg

Building jtreg from the source

Running the standard set of OpenJDK tests

Writing your own test for jtreg

Using jtreg in GUI mode

Writing TestNG tests for jtreg

Compiling JT Harness from the source code

Building and running jcstress

Writing tests for jcstress

Creating a benchmark project using JMH

Downloading the source and compiling JHM

Contributing to OpenJDK

Contributing to OpenJDK

Becoming a contributor

Generating a patch with webrev

Backporting OpenJDK v9 patches to OpenJDK v8

Understanding OpenJDK groups

Understanding OpenJDK projects

Suggesting new JSRs

Suggesting new JEPs

Troubleshooting

Troubleshooting

Navigating through the process workflow

Submitting a defect to the OpenJDK bug systems

Creating a patch using NetBeans

Creating a code review

Working with Future Technologies

Working with Future Technologies

Building OpenJDK 9 on Mac OS X using Clang

Building OpenJDK 9 on Windows using MSYS

Running and testing the early access preview of OpenJDK 9

Building OpenJDK 9 with Graal

Building OpenJDK 9 with Sumatra

Build Automation

Build Automation

Installing VirtualBox

Preparing SSH keys

Preparing VirtualBox machines with Linux

Preparing VirtualBox machines with Mac OS X

Preparing VirtualBox machines with Windows

Automating builds

Building cross-platform installers

Index

Customer Reviews

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Debugging Java code using NetBeans

Obviously, when someone is writing any code, some debugging is required. It is no surprise that NetBeans, as a high-standard IDE, provides some tools to do that. This recipe will show how to debug the Java code using NetBeans.

Getting ready

You will need to install NetBeans and set up a development environment, as described previously in the chapter.

How to do it...

We will use NetBeans to debug our own OpenJDK Java code. We will need to rebuild OpenJDK with debug symbols, and configure NetBeans to make debugging possible:

First, let's make our OpenJDK instance with debug symbols:

bash ./configure --enable-debug
make all CONF=linux-x86_64-normal-server-fastdebug

Let's ensure that a debuggable version is built:

./build/linux-x86_64-normal-server-fastdebug/jdk/bin/java -version
openjdk version "1.8.0-internal-fastdebug"
OpenJDK Runtime Environment (build 1.8.0-internal-fastdebug-dsmd_2014_03_27_05_34-b00)
OpenJDK 64-Bit Server VM (build 25.0-b70-fastdebug, mixed...