##Rerequirement

• Ubuntu 14.04+
• git

##Start

1. download openjdk 8

git clone -b jdk8 https://github.com/dmlloyd/openjdk

2. build openjdk 8

bash ./startup.sh

3. create java class HelloHotSpot

public class HelloHotSpot {
    public static void main(String []args) {
        System.out.println("Hello HotSpot");
    }
}

4. start hotspot

../../../jdk/bin/javac HelloHotSpot.java

cd build/linux-x86_64-normal-server-fastdebug/hotspot/linux_amd64_compiler2/fastdebug/

ALT_JAVA_HOME=../../../jdk

./hotspot -gdb HelloHotSpot

##HotSpot code base

http://cloc.sourceforge.net v 1.60 T=32.92 s (128.6 files/s, 39208.1 lines/s)

4669 text files. 4519 unique files. 408 files ignored.

---

Language files blank comment code

C++ 812 80690 120633 431429 Java 2078 33010 76297 257950 C/C++ Header 1051 35023 61731 137310 XML 54 643 242 16066 C 29 1736 1919 8961 XSLT 11 653 239 4712 Assembly 8 105 32 3154 Bourne Shell 90 612 2300 2451 make 20 560 1094 2358 HTML 8 237 3 2063 D 8 164 248 1685 Javascript 3 103 192 698 Objective C 1 112 121 611 SKILL 3 75 0 531 DOS Batch 41 175 1002 430 ASP.Net 1 24 0 161 Ant 13 27 88 107 DTD 1 6 18 62 Teamcenter def 1 0 0 7

SUM: 4233 153955 266159 870746

##JDK code base

22345 text files. 21831 unique files. 2173 files ignored.

http://cloc.sourceforge.net v 1.60 T=156.42 s (128.2 files/s, 35520.6 lines/s)

Language files blank comment code

Java 16462 429040 1508621 2314751 XML 672 776 1895 392095 C 910 69727 82096 360196 C/C++ Header 752 19917 43739 83461 C++ 223 16243 19359 83161 HTML 368 3953 6258 25363 Objective C 101 5688 6434 21785 Bourne Shell 375 4618 13117 17403 Javascript 31 515 2298 3264 SKILL 4 50 0 3059 XSLT 9 137 58 2512 DTD 6 718 312 2380 Ant 28 582 820 1778 XSD 13 100 84 1069 D 14 358 812 1024 make 13 194 397 736 awk 21 108 196 367 ASP.Net 22 40 0 284 Assembly 1 34 0 228 Korn Shell 5 68 145 228 Haskell 1 35 45 195 CSS 2 63 26 182 Bourne Again Shell 3 34 71 157 C# 2 29 76 72 Ruby 2 16 53 46 IDL 2 1 0 34 JSP 1 6 0 24 Perl 1 2 24 13 C Shell 3 0 71 6 DOS Batch 1 3 30 2

SUM: 20048 553055 1687037 3315875