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    openJdk1.8中的makefile，記錄下java的執(zhí)行文件編譯過程及jvm編譯過程。

    目錄說明

    openjdk源碼中有很多目錄，根據(jù)功能做了模塊化劃分，每個(gè)目錄實(shí)現(xiàn)其相應(yīng)的功能。每個(gè)目錄下的結(jié)構(gòu)都差不多，分為src(源碼)、make(makefile)、test(或沒有)、其他特殊目錄。

    openjdk

common 一些公共文件，比如下載源碼的shell腳本、生成make的autoconf等文件

corba 分布式通訊接口

hotspot 虛擬機(jī)實(shí)現(xiàn)

jaxp xml處理代碼

jaxws ws實(shí)現(xiàn)

apijdk jdk源碼

langtools java語言工具實(shí)現(xiàn)，比如javac、javap等

make make文件

nashorn java中js的運(yùn)行時(shí)實(shí)現(xiàn)

test 測(cè)試文件


    • Jdk目錄 
    src 源碼目錄
bsd bsd實(shí)現(xiàn)
linux linux實(shí)現(xiàn)
macosx macos實(shí)現(xiàn)
share 公用代碼，linux平臺(tái)代碼會(huì)在這里
solaris solaris實(shí)現(xiàn)
windows window實(shí)現(xiàn)
make makefile
test 單元測(cè)試文件

    • langtools目錄

    該目錄主要實(shí)現(xiàn)了jdk提供的基于jvm的工具，比如:java, javac, javah, javap等。

    langtools
    src 源碼目錄
          share java源代碼
          bin 模板
          classes java源碼文件
                     com 存放了java提供的一些基礎(chǔ)類實(shí)現(xiàn),打包成tools.jar
                     javax
                     jdk
          sample 樣例源碼
make makefile目錄
test 測(cè)試用例目錄


    Makefile目標(biāo)生成

    可執(zhí)行文件編譯Makefile

    文件名為：/openjdk/jdk/make/CompileLaunchers.gmkjava中提供的bin目錄下的java、javac、javap等都不是完全通過c/c++編寫實(shí)現(xiàn)的，是通過c/c++入口，啟動(dòng)虛擬機(jī)加載class文件實(shí)現(xiàn)的相關(guān)功能。通過c/c++的main函數(shù)入口，創(chuàng)建jvm虛擬機(jī)后，通過執(zhí)行相關(guān)功能的java代碼實(shí)現(xiàn)其功能，所以java相關(guān)的功能如編譯、運(yùn)行、查看jvm信息等功能都是通過啟動(dòng)一個(gè)jvm虛擬機(jī)或者通過jvmti等實(shí)現(xiàn)的。

    在makefile文件中可以查看到該部分定義。

    ifndef BUILD_HEADLESS_ONLY
  $(eval $(call SetupLauncher,appletviewer, \
      -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "sun.applet.Main"$(COMMA) }',, \
      $(XLIBS)))
endif

$(eval $(call SetupLauncher,extcheck, \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.extcheck.Main"$(COMMA) }'))

$(eval $(call SetupLauncher,idlj, \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.corba.se.idl.toJavaPortable.Compile"$(COMMA) }'))

$(eval $(call SetupLauncher,jar, \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "sun.tools.jar.Main"$(COMMA) }'))

$(eval $(call SetupLauncher,jarsigner, \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "sun.security.tools.jarsigner.Main"$(COMMA) }'))

$(eval $(call SetupLauncher,javac, \
    -DEXPAND_CLASSPATH_WILDCARDS \
    -DNEVER_ACT_AS_SERVER_CLASS_MACHINE \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.javac.Main"$(COMMA) }'))

ifeq ($(ENABLE_SJAVAC), yes)
  $(eval $(call SetupLauncher,sjavac, \
      -DEXPAND_CLASSPATH_WILDCARDS \
      -DNEVER_ACT_AS_SERVER_CLASS_MACHINE \
      -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.sjavac.Main"$(COMMA) }'))
endif

$(eval $(call SetupLauncher,javadoc, \
    -DEXPAND_CLASSPATH_WILDCARDS \
    -DNEVER_ACT_AS_SERVER_CLASS_MACHINE \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.javadoc.Main"$(COMMA) }'))

$(eval $(call SetupLauncher,javah, \
    -DEXPAND_CLASSPATH_WILDCARDS \
    -DNEVER_ACT_AS_SERVER_CLASS_MACHINE \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.javah.Main"$(COMMA) }'))

$(eval $(call SetupLauncher,javap, \
    -DEXPAND_CLASSPATH_WILDCARDS \
    -DNEVER_ACT_AS_SERVER_CLASS_MACHINE \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.javap.Main"$(COMMA) }'))

$(eval $(call SetupLauncher,jdeps, \
    -DEXPAND_CLASSPATH_WILDCARDS \
    -DNEVER_ACT_AS_SERVER_CLASS_MACHINE \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.jdeps.Main"$(COMMA) }'))

BUILD_LAUNCHER_jconsole_CFLAGS_windows :=-DJAVAW
BUILD_LAUNCHER_jconsole_LDFLAGS_windows :=user32.lib

$(eval $(call SetupLauncher,jconsole, \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "-J-Djconsole.showOutputViewer"$(COMMA) "sun.tools.jconsole.JConsole"$(COMMA) }' \
    -DAPP_CLASSPATH='{ "/lib/jconsole.jar"$(COMMA) "/lib/tools.jar"$(COMMA) "/classes" }'))

$(eval $(call SetupLauncher,jdb, \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.example.debug.tty.TTY"$(COMMA) }' \
    -DAPP_CLASSPATH='{ "/lib/tools.jar"$(COMMA) "/lib/sa-jdi.jar"$(COMMA) "/classes" }'))

$(eval $(call SetupLauncher,jhat, \
    -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.hat.Main"$(COMMA) }'))

    具體各個(gè)具體功能實(shí)現(xiàn)可以由makefile中找到相關(guān)的類文件查看實(shí)現(xiàn)。這些類在目錄langtools目錄中。

    在linux上編譯openjdk的時(shí)候，所有java提供的工具程序(bin目錄下的可執(zhí)行程序)入口都是jdk/src/bin/share/bin/main.c。但是具體的功能代碼實(shí)現(xiàn)其實(shí)是在langtools下通過java代碼實(shí)現(xiàn)的，到底是怎么是怎么實(shí)現(xiàn)的呢。1、在jdk/src/share/bin/defines.h中通過宏開關(guān)實(shí)現(xiàn)了jvm虛擬機(jī)執(zhí)行參數(shù)的定義，如下：

    #如果定義了JAVA_ARGS宏，則會(huì)把jvm的參數(shù)從宏定義中獲取
# 此處參照/openjdk/jdk/make/CompileLaunchers.gmk文件在聲明javac的地方，定義了該宏內(nèi)容
# -DJAVA_ARGS='{ "-J-ms8m"$(COMMA) "com.sun.tools.javac.Main"$(COMMA) }'))，所以生成的elf文件javac中
# 會(huì)得到該值為{ "-J-ms8m"$(COMMA) "com.sun.tools.javac.Main"$(COMMA) }
#ifdef JAVA_ARGS
static const char* const_progname="java";
static const char* const_jargs[]=JAVA_ARGS;
/*
 * ApplicationHome is prepended to each of these entries; the resulting
 * strings are concatenated (separated by PATH_SEPARATOR) and used as the
 * value of -cp option to the launcher.
 */
#ifndef APP_CLASSPATH
#define APP_CLASSPATH        { "/lib/tools.jar", "/classes" }
#endif /* APP_CLASSPATH */
static const char* const_appclasspath[]=APP_CLASSPATH;
#else  /* !JAVA_ARGS */
#ifdef PROGNAME
static const char* const_progname=PROGNAME;
#else
static char* const_progname=NULL;
#endif
static const char** const_jargs=NULL;
static const char** const_appclasspath=NULL;
#endif /* JAVA_ARGS */

#ifdef LAUNCHER_NAME
static const char* const_launcher=LAUNCHER_NAME;
#else  /* LAUNCHER_NAME */
static char* const_launcher=NULL;
#endif /* LAUNCHER_NAME */

#ifdef EXPAND_CLASSPATH_WILDCARDS
static const jboolean const_cpwildcard=JNI_TRUE;
#else
static const jboolean const_cpwildcard=JNI_FALSE;
#endif /* EXPAND_CLASSPATH_WILDCARDS */

#if defined(NEVER_ACT_AS_SERVER_CLASS_MACHINE)
static const jint const_ergo_class=NEVER_SERVER_CLASS;
#elif defined(ALWAYS_ACT_AS_SERVER_CLASS_MACHINE)
static const jint const_ergo_class=ALWAYS_SERVER_CLASS;
#else
static const jint const_ergo_class=DEFAULT_POLICY;
#endif /* NEVER_ACT_AS_SERVER_CLASS_MACHINE */

    最終生成的elf程序常量區(qū)段會(huì)有程序名稱及入口的class類名稱。

    當(dāng)使用javac編譯java文件時(shí)，入口參數(shù)1為java文件路徑，然后啟動(dòng)一個(gè)java虛擬機(jī)vm，把com.sun.tools.javac.Main aaa.java傳遞給java虛擬機(jī)vm執(zhí)行，傳遞給虛擬機(jī)參數(shù)如下：

    JavaVM args:
    version 0x00010002, ignoreUnrecognized is JNI_FALSE, nOptions is 7
    option[0]='-Dsun.java.launcher.diag=true'
    option[1]='-Dapplication.home=/opt/source/jdk8u-dev/build/linux-x86_64-normal-server-slowdebug/jdk'
    option[2]='-Djava.class.path=/opt/source/jdk8u-dev/build/linux-x86_64-normal-server-slowdebug/jdk/lib/tools.jar:/opt/source/jdk8u-dev/build/linux-x86_64-normal-server-slowdebug/jdk/classes'
    option[3]='-Xms8m'
    option[4]='-Dsun.java.command=com.sun.tools.javac.Main aaa.java'
    option[5]='-Dsun.java.launcher=SUN_STANDARD'
    option[6]='-Dsun.java.launcher.pid=5997'


    • 2.1 jar包生成

    jdk編譯后會(huì)生成很多jar包，除了jvm虛擬機(jī)提供的一些平臺(tái)功能外，其他語言層面的功能都是由java開發(fā)的jar包對(duì)外提供的，所以現(xiàn)在有很多語言都基于jvm做了實(shí)現(xiàn)。
    openjdk提供了由運(yùn)行時(shí)rt.jar, 工具tools.jar，編碼charset.jar等其他功能jar。
    下面詳細(xì)介紹幾個(gè)重要的jar包是怎么生成的。

    tools.jar包

    tools.jar包在jdk的lib目錄下，主要提供jdk/bin目錄下java工具的虛擬機(jī)里面的實(shí)現(xiàn)代碼，由java開發(fā)。生成tools.jar包的makefile文件是：文件名為：/openjdk/jdk/make/CreateJars.gmk，內(nèi)容如下：

    源碼路徑：langtools目錄

    #聲明tools包含的目錄范圍
TOOLS_JAR_INCLUDES :=\
    com/sun/codemodel \
    com/sun/istack/internal/tools \
    com/sun/jarsigner \
    com/sun/javadoc \
    com/sun/jdi \
    com/sun/source \
    com/sun/tools/attach \
    com/sun/tools/classfile \
    com/sun/tools/corba \
    com/sun/tools/doclets \
    com/sun/tools/doclint \
    com/sun/tools/example/debug/expr \
    com/sun/tools/example/debug/tty \
    com/sun/tools/extcheck \
    com/sun/tools/hat \
    com/sun/tools/internal/jxc \
    com/sun/tools/internal/jxc/ap \
    com/sun/tools/internal/ws \
    com/sun/tools/internal/ws/wscompile/plugin/at_generated \
    com/sun/tools/internal/xjc \
    com/sun/tools/javac \
    com/sun/tools/javadoc \
    com/sun/tools/javah \
    com/sun/tools/javap \
    com/sun/tools/jdeps \
    com/sun/tools/jdi \
    com/sun/tools/script/shell \
    com/sun/xml/internal/dtdparser \
    com/sun/xml/internal/rngom \
    com/sun/xml/internal/xsom \
    org/relaxng/datatype \
    sun/applet \
    sun/jvmstat \
    sun/rmi/rmic \
    sun/security/tools/jarsigner \
    sun/tools/asm \
    sun/tools/attach \
    sun/tools/jar \
    sun/tools/java \
    sun/tools/javac \
    sun/tools/jcmd \
    sun/tools/jinfo \
    sun/tools/jmap \
    sun/tools/jps \
    sun/tools/jstack \
    sun/tools/jstat \
    sun/tools/jstatd \
    sun/tools/native2ascii \
    sun/tools/serialver \
    sun/tools/tree \
    sun/tools/util

# tools.jar排除sjavac工具
# The sjavac tools is not ready for public consumption.
TOOLS_JAR_EXCLUDES=com/sun/tools/sjavac

#調(diào)用打包生成tools.jar文件
$(eval $(call SetupArchive,BUILD_TOOLS_JAR, , \
    SRCS :=$(JDK_OUTPUTDIR)/classes, \
    SUFFIXES :=.class .prp .gif .properties .xml .css .xsd .js .html .txt .java \
        Tool aliasmap options, \
    INCLUDES :=$(TOOLS_JAR_INCLUDES), \
    EXCLUDES :=$(TOOLS_JAR_EXCLUDES), \
    EXTRA_FILES :=META-INF/services/com.sun.jdi.connect.Connector \
        META-INF/services/com.sun.jdi.connect.spi.TransportService \
        META-INF/services/com.sun.tools.attach.spi.AttachProvider \
        META-INF/services/com.sun.tools.internal.ws.wscompile.Plugin \
        META-INF/services/com.sun.tools.internal.xjc.Plugin, \
    JAR :=$(IMAGES_OUTPUTDIR)/lib/tools.jar, \
    SKIP_METAINF :=true, \
    CHECK_COMPRESS_JAR :=true))


    rt.jar包

    rt.jar包在jdk的lib目錄下，主要提供java語言層面的運(yùn)行時(shí)庫，由java開發(fā)。rt.jar包含的文件范圍由:/openjdk/jdk/make/profile-rtjar-includes.txt定義，內(nèi)容如下:

    #
# Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.  Oracle designates this
# particular file as subject to the "Classpath" exception as provided
# by Oracle in the LICENSE file that accompanied this code.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

# Included or excluded types must take one of two forms
# - *.class to indicate all classes; or else
# - a full single type name e.g.
#     com/sun/security/auth/callback/DialogCallbackHandler$$1.class
# You can not use arbitrary wildcards like DialogCallbackHandler*.class.
#
# Notes:
# - Nested types must use $$ in place of $ as $ is the make meta-character
# - If a package is not listed in any profile's inclusion list then it will
#   not appear in any profile. But if a package is also missing from the
#   full JRE's inclusion list then it will still be part of the full JRE.
#   This is because the full JRE's inclusion lists are only used to define
#   the exclusion lists for profiles; they are not used to define the full
#   JRE contents - that is still done with the pre-profile legacy mechanism
#   (all packagesthat can be found, less those not intended for rt.jar).
#   This was done to minimize the impact of profiles on the regular
#   non-profile build.
#
PROFILE_1_RTJAR_INCLUDE_PACKAGES :=\
    com/sun/demo/jvmti/hprof \
    com/sun/java/util/jar/pack \
    com/sun/net/ssl \
    com/sun/nio/file \
    com/sun/security/cert/internal/x509 \
    java/io \
    java/lang \
    java/math \
    java/net \
    java/nio \
    java/security \
    java/text \
    java/time \
    java/util \
    javax/net \
    javax/script \
    javax/security \
    jdk \
    sun/invoke \
    sun/launcher \
    sun/misc \
    sun/net/ \
    sun/nio \
    sun/reflect \
    sun/security \
    sun/text \
    sun/usagetracker \
    sun/util

PROFILE_1_RTJAR_INCLUDE_TYPES :=PROFILE_1_RTJAR_EXCLUDE_TYPES :=PROFILE_1_INCLUDE_METAINF_SERVICES :=PROFILE_2_RTJAR_INCLUDE_PACKAGES :=\
    com/sun/java_cup/internal/runtime \
    com/sun/net/httpserver \
    com/sun/org/apache \
    com/sun/rmi/rmid \
    com/sun/xml/internal/stream \
    java/rmi \
    java/sql \
    javax/rmi/ssl \
    javax/sql \
    javax/transaction \
    javax/xml \
    org/w3c \
    org/xml/sax \
    sun/net/httpserver \
    sun/rmi \
    sun/util/xml

PROFILE_2_RTJAR_INCLUDE_TYPES :=PROFILE_2_RTJAR_EXCLUDE_TYPES :=PROFILE_2_INCLUDE_METAINF_SERVICES :=\
    META-INF/services/sun.util.spi.XmlPropertiesProvider


PROFILE_3_RTJAR_INCLUDE_PACKAGES :=\
    com/sun/jmx \
    com/sun/jndi \
    com/sun/management \
    com/sun/naming/internal \
    com/sun/nio/sctp \
    com/sun/org/apache/xml/internal/security \
    com/sun/rowset \
    com/sun/security/auth \
    com/sun/security/jgss \
    com/sun/security/ntlm \
    com/sun/security/sasl \
    com/sun/tracing \
    java/lang/instrument \
    java/lang/management \
    java/security/acl \
    java/util/prefs \
    javax/annotation/processing \
    javax/lang/model \
    javax/management \
    javax/naming \
    javax/security/auth/kerberos \
    javax/security/sasl \
    javax/smartcardio \
    javax/sql/rowset \
    javax/tools \
    javax/xml/crypto \
    org/ietf/jgss \
    org/jcp/xml \
    sun/instrument \
    sun/management \
    sun/net/dns \
    sun/net/www/protocol/http/ntlm \
    sun/net/www/protocol/http/spnego \
    sun/nio/ch/sctp \
    sun/security/acl \
    sun/security/jgss \
    sun/security/krb5 \
    sun/security/provider/certpath/ldap \
    sun/security/smartcardio \
    sun/tracing

PROFILE_3_RTJAR_INCLUDE_TYPES :=PROFILE_3_RTJAR_EXCLUDE_TYPES :=\
    com/sun/security/auth/callback/DialogCallbackHandler$$1.class \
    com/sun/security/auth/callback/DialogCallbackHandler$$2.class \
    com/sun/security/auth/callback/DialogCallbackHandler$$Action.class \
    com/sun/security/auth/callback/DialogCallbackHandler$$ConfirmationInfo.class \
    com/sun/security/auth/callback/DialogCallbackHandler.class \
    javax/management/remote/rmi/_RMIConnectionImpl_Tie.class \
    javax/management/remote/rmi/_RMIConnection_Stub.class \
    javax/management/remote/rmi/_RMIServerImpl_Tie.class \
    javax/management/remote/rmi/_RMIServer_Stub.class

FULL_JRE_RTJAR_INCLUDE_PACKAGES :=\
    com/oracle \
    com/sun/accessibility/internal/resources \
    com/sun/activation/registries \
    com/sun/awt \
    com/sun/beans \
    com/sun/corba \
    com/sun/image/codec/jpeg \
    com/sun/imageio \
    com/sun/istack \
    com/sun/java/browser \
    com/sun/java/swing \
    com/sun/jmx/remote/protocol/iiop \
    com/sun/jndi/cosnaming \
    com/sun/jndi/toolkit/corba \
    com/sun/jndi/url/corbaname \
    com/sun/jndi/url/iiop \
    com/sun/jndi/url/iiopname \
    com/sun/media/sound \
    com/sun/org/glassfish \
    com/sun/org/omg \
    com/sun/swing \
    com/sun/xml/internal/bind \
    com/sun/xml/internal/fastinfoset \
    com/sun/xml/internal/messaging \
    com/sun/xml/internal/org \
    com/sun/xml/internal/stream/buffer \
    com/sun/xml/internal/txw2 \
    com/sun/xml/internal/ws \
    java/applet \
    java/awt \
    java/beans \
    javax/accessibility \
    javax/activation \
    javax/activity \
    javax/imageio \
    javax/jws \
    javax/print \
    javax/rmi/CORBA \
    javax/sound \
    javax/swing \
    javax/xml/bind \
    javax/xml/soap \
    javax/xml/ws \
    org/omg \
    sun/applet \
    sun/audio \
    sun/awt \
    sun/corba \
    sun/dc \
    sun/font \
    sun/java2d \
    sun/net/ftp \
    sun/net/smtp \
    sun/net/www/content/audio \
    sun/net/www/content/image \
    sun/net/www/content/text \
    sun/net/www/protocol/ftp \
    sun/net/www/protocol/mailto \
    sun/net/www/protocol/netdoc \
    sun/print \
    sun/security/tools/policytool \
    sun/swing \
    sun/tools/jar

FULL_JRE_RTJAR_INCLUDE_TYPES :=\
    com/sun/security/auth/callback/DialogCallbackHandler$$1.class \
    com/sun/security/auth/callback/DialogCallbackHandler$$2.class \
    com/sun/security/auth/callback/DialogCallbackHandler$$Action.class \
    com/sun/security/auth/callback/DialogCallbackHandler$$ConfirmationInfo.class \
    com/sun/security/auth/callback/DialogCallbackHandler.class \
    javax/annotation/*.class \
    javax/management/remote/rmi/_RMIConnectionImpl_Tie.class \
    javax/management/remote/rmi/_RMIConnection_Stub.class \
    javax/management/remote/rmi/_RMIServerImpl_Tie.class \
    javax/management/remote/rmi/_RMIServer_Stub.class \
    javax/rmi/*.class

FULL_JRE_RTJAR_EXCLUDE_TYPES :=FULL_JRE_INCLUDE_METAINF_SERVICES :=\
    META-INF/services/com.sun.tools.internal.ws.wscompile.Plugin \
    META-INF/services/com.sun.tools.internal.xjc.Plugin \
    META-INF/services/javax.print.PrintServiceLookup \
    META-INF/services/javax.print.StreamPrintServiceFactory \
    META-INF/services/javax.sound.midi.spi.MidiDeviceProvider \
    META-INF/services/javax.sound.midi.spi.MidiFileReader \
    META-INF/services/javax.sound.midi.spi.MidiFileWriter \
    META-INF/services/javax.sound.midi.spi.SoundbankReader \
    META-INF/services/javax.sound.sampled.spi.AudioFileReader \
    META-INF/services/javax.sound.sampled.spi.AudioFileWriter \
    META-INF/services/javax.sound.sampled.spi.FormatConversionProvider \
    META-INF/services/javax.sound.sampled.spi.MixerProvider \
    META-INF/services/sun.java2d.cmm.PCMM \
    META-INF/services/sun.java2d.pipe.RenderingEngine

    生成tools.jar包的makefile文件是：文件名為：/openjdk/jdk/make/CreateJars.gmk，內(nèi)容如下：

    #聲明rt排除的范圍
# Full JRE exclude list for rt.jar and resources.jar
# This value should exclude types destined for jars other than rt.jar and resources.jar.
# When building a Profile this value augments the profile specific exclusions
RT_JAR_EXCLUDES +=\
    com/sun/codemodel \
    com/sun/crypto/provider \
    com/sun/istack/internal/tools \
    com/sun/jarsigner \
    com/sun/java/accessibility \
    com/sun/javadoc \
    com/sun/jdi \
    com/sun/net/ssl/internal/ssl \
    com/sun/source \
    com/sun/tools \
    com/sun/xml/internal/dtdparser \
    com/sun/xml/internal/rngom \
    com/sun/xml/internal/xsom \
    javax/crypto \
    javax/swing/AbstractButtonBeanInfo.class \
    javax/swing/beaninfo \
    javax/swing/BoxBeanInfo.class \
    javax/swing/JAppletBeanInfo.class \
    javax/swing/JButtonBeanInfo.class \
    javax/swing/JCheckBoxBeanInfo.class \
    javax/swing/JCheckBoxMenuItemBeanInfo.class \
    javax/swing/JColorChooserBeanInfo.class \
    javax/swing/JComboBoxBeanInfo.class \
    javax/swing/JComponentBeanInfo.class \
    javax/swing/JDesktopPaneBeanInfo.class \
    javax/swing/JDialogBeanInfo.class \
    javax/swing/JEditorPaneBeanInfo.class \
    javax/swing/JFileChooserBeanInfo.class \
    javax/swing/JFormattedTextFieldBeanInfo.class \
    javax/swing/JFrameBeanInfo.class \
    javax/swing/JInternalFrameBeanInfo.class \
    javax/swing/JLabelBeanInfo.class \
    javax/swing/JLayeredPaneBeanInfo.class \
    javax/swing/JListBeanInfo.class \
    javax/swing/JMenuBarBeanInfo.class \
    javax/swing/JMenuBeanInfo.class \
    javax/swing/JMenuItemBeanInfo.class \
    javax/swing/JOptionPaneBeanInfo.class \
    javax/swing/JPanelBeanInfo.class \
    javax/swing/JPasswordFieldBeanInfo.class \
    javax/swing/JPopupMenuBeanInfo.class \
    javax/swing/JProgressBarBeanInfo.class \
    javax/swing/JRadioButtonBeanInfo.class \
    javax/swing/JRadioButtonMenuItemBeanInfo.class \
    javax/swing/JScrollBarBeanInfo.class \
    javax/swing/JScrollPaneBeanInfo.class \
    javax/swing/JSeparatorBeanInfo.class \
    javax/swing/JSliderBeanInfo.class \
    javax/swing/JSpinnerBeanInfo.class \
    javax/swing/JSplitPaneBeanInfo.class \
    javax/swing/JTabbedPaneBeanInfo.class \
    javax/swing/JTableBeanInfo.class \
    javax/swing/JTextAreaBeanInfo.class \
    javax/swing/JTextFieldBeanInfo.class \
    javax/swing/JTextPaneBeanInfo.class \
    javax/swing/JToggleButtonBeanInfo.class \
    javax/swing/JToolBarBeanInfo.class \
    javax/swing/JTreeBeanInfo.class \
    javax/swing/JWindowBeanInfo.class \
    javax/swing/SwingBeanInfoBase.class \
    javax/swing/text/JTextComponentBeanInfo.class \
    META-INF/services/com.sun.jdi.connect.Connector \
    META-INF/services/com.sun.jdi.connect.spi.TransportService \
    META-INF/services/com.sun.tools.attach.spi.AttachProvider \
    META-INF/services/com.sun.tools.xjc.Plugin \
    META-INF/services/sun.net.spi.nameservice.NameServiceDescriptor \
    org/relaxng/datatype \
    sun/awt/HKSCS.class \
    sun/awt/motif/X11GB2312.class \
    sun/awt/motif/X11GB2312\$$$$Decoder.class \
    sun/awt/motif/X11GB2312\$$$$Encoder.class \
    sun/awt/motif/X11GBK.class \
    sun/awt/motif/X11GBK\$$$$Encoder.class \
    sun/awt/motif/X11KSC5601.class \
    sun/awt/motif/X11KSC5601\$$$$Decoder.class \
    sun/awt/motif/X11KSC5601\$$$$Encoder.class \
    sun/jvmstat \
    sun/net/spi/nameservice/dns \
    sun/nio/cs/ext \
    sun/rmi/rmic \
    sun/security/ec \
    sun/security/internal \
    sun/security/mscapi \
    sun/security/pkcs11 \
    sun/security/provider/Sun.class \
    sun/security/rsa/SunRsaSign.class \
    sun/security/ssl \
    sun/security/tools/jarsigner \
    sun/swing/BeanInfoUtils.class \
    sun/text/resources/cldr \
    sun/tools/asm \
    sun/tools/attach \
    sun/tools/java \
    sun/tools/javac \
    sun/tools/jcmd \
    sun/tools/jconsole \
    sun/tools/jinfo \
    sun/tools/jmap \
    sun/tools/jps \
    sun/tools/jstack \
    sun/tools/jstat \
    sun/tools/jstatd \
    sun/tools/native2ascii \
    sun/tools/serialver \
    sun/tools/tree \
    sun/tools/util \
    sun/util/cldr/CLDRLocaleDataMetaInfo.class \
    sun/util/resources/cldr \
    $(LOCALEDATA_INCLUDES) \
    com/oracle/jrockit/jfr \
    oracle/jrockit/jfr \
    jdk/jfr

# 在jdk編譯輸出classes目錄下查詢所有定義依賴的文件
# Find all files in the classes dir to use as dependencies. This could be more fine granular.
ALL_FILES_IN_CLASSES :=$(call not-containing, _the., $(filter-out %javac_state, \
    $(call CacheFind, $(JDK_OUTPUTDIR)/classes)))

RT_JAR_MANIFEST_FILE :=$(IMAGES_OUTPUTDIR)/lib$(PROFILE)/_the.rt.jar_manifest
RESOURCE_JAR_MANIFEST_FILE :=$(IMAGES_OUTPUTDIR)/lib$(PROFILE)/_the.resources.jar_manifest

$(RT_JAR_MANIFEST_FILE): $(MAINMANIFEST) $(BEANMANIFEST)
	$(MKDIR) -p $(@D)
	$(RM) $@ $@.tmp
	$(SED) -e "s#@@RELEASE@@#$(RELEASE)#" \
	    -e "s#@@COMPANY_NAME@@#$(COMPANY_NAME)#" \
	    $(MAINMANIFEST) >> $@.tmp
	$(ECHO) >> $@.tmp
	$(CAT) $(BEANMANIFEST) >> $@.tmp
	$(MV) $@.tmp $@


# This defines a target-specific variables to make the shell logic easier to see.
# We need to find the Version.class file for the profile currently being built
$(IMAGES_OUTPUTDIR)/lib$(PROFILE)/rt.jar: \
    CLASS_FILE=$(if $(PROFILE), $(strip $(foreach class, $(PROFILE_VERSION_CLASS_TARGETS), $(if $(findstring $(PROFILE), $(class)), $(class)))), NO_SUCH_FILE)
# This is the real target
$(IMAGES_OUTPUTDIR)/lib$(PROFILE)/rt.jar: $(IMAGES_OUTPUTDIR)/lib$(PROFILE)/_the.rt.jar.contents $(RT_JAR_MANIFEST_FILE) $(PROFILE_VERSION_CLASS_TARGETS) $(BEANLESS_CLASSES_TARGETS)
	$(ECHO) Creating rt.jar $(PROFILE) Compressed=$(COMPRESS_JARS)
	$(MKDIR) -p $(@D)
	$(RM) $@ $@.tmp
	$(CD) $(JDK_OUTPUTDIR)/classes && \
	$(JAR) $(RT_JAR_CREATE_OPTIONS) $@.tmp $(RT_JAR_MANIFEST_FILE) \
	    @$(IMAGES_OUTPUTDIR)/lib$(PROFILE)/_the.rt.jar.contents && \
	if [ -f $(CLASS_FILE) ]; then \
	  $(ECHO) Updating rt.jar $(PROFILE) && \
	  $(CD) $(patsubst %$(VERSION_CLASS_PATH), %, $(CLASS_FILE)) && \
	  $(JAR) $(RT_JAR_UPDATE_OPTIONS) $@.tmp $(VERSION_CLASS_PATH); \
	  $(CD) $(BEANLESS_CLASSES) && \
	  $(JAR) $(RT_JAR_UPDATE_OPTIONS) $@.tmp $(CLASSES_TO_DEBEAN); \
	fi
	$(MV) $@.tmp $@

    jconsole.jar

    jconsole.jar包在jdk的lib目錄下，是一個(gè)Java監(jiān)視和管理控制臺(tái)的客戶端程序，由javax swing開發(fā)。jsoncole可以附加本地java進(jìn)程，通過api查詢方式或者使用jms協(xié)議查詢java虛擬機(jī)一些觀測(cè)數(shù)據(jù)。jconsole.jar主要組成由jdk/src/share/classes/sun/tools/jconsole、jdk/src/share/classes/com/sun/tools/jconsole目錄下文件組成。

    jdk本身提供了2中方式，一種是bin目錄下的jconsole程序，另外一種就是lib下的jconsole.jar包。bin下的jsoncole直接運(yùn)行，啟動(dòng)打開jconsole的main入口， lib下的jsoncole.jar需要使用java -jar jsoncole.jar運(yùn)行。

    我采用的方式是在ubuntu虛擬機(jī)中交叉編譯，生成win10下的可執(zhí)行程序grep.

    ubuntu版本22.04

    apt源為華為鏡像源

    #安裝grep的依賴包
sudo apt install build-essential libpcre3-dev
    sudo apt update  
#這個(gè)是linux交差編譯到win上的工具鏈
sudo apt install mingw-w64
sudo apt install make


    下載grep源碼包 版本3.6 Index of /gnu/grep

    tar -xvf ./grep-3.6.tar.gz
cd grep-3.6
mkdir compile-win
cd compile-win
../configure --host=x86_64-w64-mingw32 --enable-threads=windows CC=x86_64-w64-mingw32-gcc
make
cd src
ls
dfasearch.o  egrep  fgrep  grep.exe  grep.o  kwsearch.o  kwset.o  Makefile  searchutils.o

    這個(gè)時(shí)候編譯完成 但是grep.exe 體積還很大 接下來需要瘦身

    strip --strip-all grep.exe

    接下來把grep.exe copy到win10下

    UPX: the Ultimate Packer for eXecutables - Homepage

    下載upx壓縮工具


    在cmd命令行中執(zhí)行

    upx.exe grep.exe



    可以看到大小在一個(gè)滿意的范圍

    測(cè)試一下



    完成

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