JDK源码重新编译——支持eclipse调试JDK源码--转载
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最近在研究jdk源码，发现debug时无法查看源码里的变量值。?因为sun提供的jdk并不能查看运行中的局部变量，需要重新编译一下rt.jar。下面这六步是编译jdk的具体步骤： Step?1:??Locate?the?JDK?source First?navigate?to?the?JDK?install?directory,?and?locate?the?src.zip?file.?This?file?contains?the?JDK?sources?–?and?is?absolutely?invaluable?for?the?rest?of?this?process. Next,?unzip?this?folder?to?some?location,?such?as?c:src. Step?2:?List?all?the?source?files?to?be?compiled Generate?a?list?of?all?.java?files?in?the?unzipped?folder,?out?to?a?separate?file:dir?/B?/S?/X?c:src*.java?>?jdk-src.txt Step?3:?Compile?the?source Compile?the?source?files?named?in?this?file,?using?the?–g?option. javac-verbose?-nowarn?-g?-source?1.6?-target?1.6?-J-Xms512m?-J-Xmx1024m?-bootclasspath?C:javajdk1.6.0_07jrelibrt.jar;C:javajdk1.6.0_07jrelibjce.jar;C:javajdk1.6.0_07jrelibjsse.jar;C:javajdk1.6.0_07jrelibresources.jar;C:javajdk1.6.0_07jrelibcharsets.jar;C:javajdk1.6.0_07jrelibdeploy.jar?-sourcepath?src?-classpath?src?-d?jdk-class?@jdk-src.txt ?Note?the?presence?of?the?–bootclasspath?flag?which?makes?the?stated?JARs?available?to?the?compiler.?This?is?absolutely?critical?when?trying?to?build?the?source?distribution?of?JDK?6. Step?4:?Extract?rt.jar Extract?the?original?rt.jar?file,?that?is?found?in?JAVA_HOMEjrelib,?into?a?temporary?folder. Step?5:??Generate?a?composite?build Copy?the?newly?compiled?.class?files?from?our?jdk-class?over?the?folder?where?the?rt.jar?file?was?expanded.?This?ensures?that?the?final?set?has?old?classes?overwritten?by?newer?classes?with?debug?information,?while?still?retaining?class?files?that?we?couldn't?compile. Step?6:?Regenerate?rt.jar Finally,?recompress?all?the?files?from?the?composite?folder?into?a?new?rt.jar?file,?and?overwrite?the?original?rt.jar?file?with?this?new?one. 如果想在eclipse中跟踪调试，需要在Windows?->?Preferences?->?Java-Installed?JRE下，选择安装的jdk，点edit，然后在列出的jre?system?libraries列表中选择rt.jar，设置其中的Source?attachment为C:javajdk1.6.0_07src.zip。 ------------------------------------------------------------------------------------------------------ 下面是一个方便的linux脚本，?只要设置了JAVA_HOME，?就可以轻松搞定上面的事情了:) #!/bin/sh if?[?-z?"$JAVA_HOME"?] then echo?"Must?set?JAVA_HOME" exit?1 fi cd?$JAVA_HOME mkdir?temp cp?src.zip?temp/ cd?temp/ mkdir?out unzip?src.zip rm?src.zip find?.?-name?*.java?>?filelist echo?"$(wc?-l?filelist)?java?files?to?compile" javac??-g?-d?out/?-J-Xmx1024m?-cp?"../jre/lib/tools.jar:../jre/lib/rt.jar"?@filelist? if?[?$??!=?0?] then echo?"compile?error!" exit?1 fi unzip?$JAVA_HOME/jre/lib/rt.jar?-d?$JAVA_HOME/temp/old_classes cp?-r??$JAVA_HOME/temp/out/*?$JAVA_HOME/temp/old_classes/ cd?$JAVA_HOME/temp/old_classes/ jar?cf?rt_debug.jar?* cp?rt_debug.jar?$JAVA_HOME/jre/lib/ mv?$JAVA_HOME/jre/lib/rt.jar?$JAVA_HOME/lib/rt_old.jar cd?$JAVA_HOME/jre/lib/ ln?-s?rt_debug.jar?rt.jar rm?-rf?$JAVA_HOME/temp 原文：http://hi.baidu.com/austincao/item/e6e91329892497c1a4275a1a （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |