Mac下编译openjdk及调试

一、编译环境

MacOS High Sierra 10.13.2
XCode 9.4.1（Command Line Tools)
jdk版本：jdk7u71
- 网盘下载
- 或者通过官网下载
openjdk: jdk8u-dev
- 网盘下载
- 或者通过mercurial工具下载

由于 openjdk 官方的源码不是用 git 管理的,源代码存放在 http://hg.openjdk.java.net/,首先需要安装版本管理工具mercurial, mac 上直接使用brew 进行安装即可.

brew install mercurial
hg clone http://hg.openjdk.java.net/jdk8u/jdk8u-dev/
cd jdk8u-dev
sh ./get_source.sh # 根据网络环境的不同,这一步花费的时间不同,一般花费时间较长

FreeType安装
- 可直接下载安装XQuartz
- 或者下载FreeType

sudo ./configure
make
make install

Ant1.9.13安装
- 网盘下载
- 官网下载

export ANT_HOME= $HOME/Documents/Software/JVM/apache-ant-1.9.13 export PATH=$ PATH: $ANT_HOME/bin export PATH=$ PATH:$ANT_HOME/lib

二、编译

打开terminal定位到jdk8u-dev根目录
输入如下命令

#语言选项，必须设置
export LANG=C
export CC=clang #mac平台，c编译器不再是GCC,而是clang
export COMPILER_WARNINGS_FATAL=false #跳过clang一些严格的语法检查
 
#允许自动下载依赖
export ALLOW_DOWNLOADS=true
export LFLAGS='-Xlinker -lc++ -lstdc++'
 
#并行编译的线程数，设置为和cpu内核数量一致即可
export HOTSPOT_BUILD_JOBS=4
export ALT_PARALLEL_COMPILE_JOBS=4
export SKIP_COMPARE_IMAGES=true
export USE_PRECOMPILED_HEADER=true
 
#要编译的内容
export BUILD_LANGTOOLS=true
#export BUILD_JAXP=false
#export BUILD_JAXWS=false
#export BUILD_CORBA=false
export BUILD_HOTSPOT=true
export BUILD_JDK=true
BUILD_DEPLOY=false
BUILD_INSTALL=false
unset JAVA_HOME
unset CLASSPATH

执行配置文件校验

bash ./configure

开始校验环境配置，正常会遇到如下问题：
（1）error: Xcode 4 is required to build JDK 8

error: Xcode 4 is required to build JDK 8, the version found was . Use --with-xcode-path to specify the location of Xcode 4 or make Xcode 4 active by using xcode-select.

解决办法：
找到configure 文件并打开vim common/autoconf/generated-configure.sh,找到判断版本的地方,将这一段全部注释掉.

    #Fail-fast: verify we're building on Xcode 4, we cannot build with Xcode 5 or later
    XCODE_VERSION=`$XCODEBUILD -version | grep '^Xcode ' | sed 's/Xcode //'`XC_VERSION_PARTS=( ${XCODE_VERSION//./ } )
    if test ! "${XC_VERSION_PARTS[0]}" = "4"; then
     as_fn_error $? "Xcode 4 is required to build JDK 8, the version found was  $XCODE_VERSION. Use --with-xcode-path to specify the location of Xcode 4 or make Xcode 4 active by using xcode-select." "$LINENO" 5
    fi

#

（2）error: A gcc compiler is required（找不到gcc 编译器）

configure: error: A gcc compiler is required. Try setting --with-tools-dir.
configure exiting with result code 1

解决办法：
找到configure 文件并打开vim common/autoconf/generated-configure.sh,有多处校验的地方,找到并且注释掉校验的逻辑.

if test $? -ne 0; then
      { $as_echo "$as_me:${as_lineno-$LINENO}: The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required $TOOLCHAIN_TYPE compiler." >&5
$as_echo "$as_me: The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required $TOOLCHAIN_TYPE compiler." >&6;}
      { $as_echo "$as_me:${as_lineno-$LINENO}: The result from running it was: \"$COMPILER_VERSION_OUTPUT\"" >&5
$as_echo "$as_me: The result from running it was: \"$COMPILER_VERSION_OUTPUT\"" >&6;}
      as_fn_error $? "A $TOOLCHAIN_TYPE compiler is required. Try setting --with-tools-dir." "$LINENO" 5
    fi


#

（3）error: Could not find freetype

configure: error: Could not find freetype! configure exiting with
result code 1

解决办法：

bash ./configure  --with-boot-jdk=/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home --with-freetype-include=/usr/local/include/freetype2 --with-freetype-lib=/usr/local/lib/

#

校验完成后的大概提示如下

====================================================
A new configuration has been successfully created in
/Users/davi/Documents/jdk8u-dev/build/macosx-x86_64-normal-server-release
using configure arguments '--with-freetype-include=/usr/local/include/freetype2 --with-freetype-lib=/usr/local/lib/'.
 
Configuration summary:
* Debug level:    release
* JDK variant:    normal
* JVM variants:   server
* OpenJDK target: OS: macosx, CPU architecture: x86, address length: 64
 
Tools summary:
* Boot JDK:       java version "1.7.0_71" Java(TM) SE Runtime Environment (build 1.7.0_71-b14) Java HotSpot(TM) 64-Bit Server VM (build 24.71-b01, mixed mode)  (at /Library/Java/JavaVirtualMachines/jdk1.7.0_71.jdk/Contents/Home)
* Toolchain:      gcc (GNU Compiler Collection)
* C Compiler:     Version 9.1.0 (at /usr/bin/clang)
* C++ Compiler:   Version 9.1.0 (at /usr/bin/g++)
 
Build performance summary:
* Cores to use:   4
* Memory limit:   16384 MB

开始编译

 make all

(1) error: invalid argument ‘-std=gnu++98’ not allowed with ‘C’

error: invalid argument '-std=gnu++98' not allowed with 'C'
make[6]: *** [libjsig.dylib] Error 1
make[6]: *** Waiting for unfinished jobs....
make[5]: *** [the_vm] Error 2
make[4]: *** [product] Error 2
make[3]: *** [generic_build2] Error 2
make[2]: *** [product] Error 2
make[1]: *** [/Users/davi/Documents/jdk8u-dev/build/macosx-x86_64-normal-server-release/hotspot/_hotspot.timestamp] Error 2
make: *** [hotspot-only] Error 2

解决办法：
找到configure 文件并打开vim common/autoconf/generated-configure.sh，找到如下代码并注释掉

CXXSTD_CXXFLAG="-std=gnu++98"

然后make clean，重新执行 configure,make all.

(2).clang: error: unknown argument: ‘-fpch-deps’

解决方法:

（1）首先查找对应的配置文件

find . -type f ! -name "*.java" | xargs grep -r "\-fpch\-deps"

1.1 匹配的查找结果如下（Mac来源于BSD，选择BSD）

./hotspot/make/bsd/makefiles/gcc.make
./hotspot/make/linux/makefiles/gcc.make
./hotspot/make/solaris/makefiles/gcc.make

2.2 修改hotspot/make/bsd/makefiles/gcc.make, 注释216-218行

# Flags for generating make dependency flags.
# ifneq ("${CC_VER_MAJOR}", "2") 
# DEPFLAGS = -fpch-deps -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d) 
# endif

三、调试

手头上有编译好的openjdk 1.8的版本，XCode 9.2，环境大同小异，应该值得借鉴吧。

New -> Project -> Command Line Tool
如图，新建工程 OpenJDK
先把新建工程的默认生成的文件全删了，然后右击OpenJDK，将编译目录的文件添加进来；
Product -> Scheme ->Edit Scheme

已编译好了，先将Build下的Target删掉;

设置好Run -> Info，如图，Executable中选择路径位于/openjdk/jdk8u-dev/build/macosx-x86_64-normal-server-release/jdk/bin中的Java

设置java的执行参数，此处，我随便选了一个编译好的class文件来调试;
从main.c打断点开始调试