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License: GNU General Public License v2.0

Makefile 0.02% Shell 0.24% JavaScript 1.05% M4 0.10% sed 0.01% Roff 0.76% HTML 0.39% CSS 0.01% Python 0.07% Java 77.51% C++ 11.90% XSLT 0.25% Perl 0.01% C 7.31% DTrace 0.01% Assembly 0.03% GDB 0.01% Objective-C 0.29% Hack 0.05% Batchfile 0.01%

jdk11u-archive-1's Introduction

Shenandoah Variant on JDK-11u

Turn off "Treating warnings as errors"

At line 171 in make/autoconf/flags-cflags.m4
Change

CFLAGS_WARNINGS_ARE_ERRORS="-Werror"

CFLAGS_WARNINGS_ARE_ERRORS=""

Build

bash ./configure --with-jvm-features=shenandoahgc --enable-debug
make images

Verify Shenandoah is working

build/*/jdk/bin/java -XX:+UseShenandoahGC -Xlog:gc -version

You should get something like this

[0.025s][info][gc] Heuristics ergonomically sets -XX:+ExplicitGCInvokesConcurrent
[0.025s][info][gc] Heuristics ergonomically sets -XX:+ShenandoahImplicitGCInvokesConcurrent
[0.027s][info][gc] Using Shenandoah
openjdk version "11.0.13-internal" 2021-10-19
OpenJDK Runtime Environment (build 11.0.13-internal+0-adhoc.root.jdk11u)
OpenJDK 64-Bit Server VM (build 11.0.13-internal+0-adhoc.root.jdk11u, mixed mode)
[0.188s][info][gc] Cancelling GC: Stopping VM

Install JDK-11u

sudo update-alternatives --install /usr/bin/java java /path/to/jdk11u/build/*/jdk/bin/java 11
sudo update-alternatives --install /usr/bin/javac javac /path/to/jdk11u/build/*/jdk/bin/javac 11

Switch among JDK versions

sudo update-alternatives --config java
sudo update-alternatives --config javac

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