前言

public class Main {

    public static String generateWord(String type) {        switch (type) {            case "宝,我今天输液了; 输的什么液?":return "想你的夜";            case "宝，我今天喝酒了; 喝的什么酒":return "和你的天长地久";            case "宝，我今天种地了; 种的什么地":return "对你的死心塌地";            default:return "";        }    }}

SM 命令学习

[arthas@91969]$ help sm USAGE:                                                                                                                                                       sm [-c <value>] [--classLoaderClass <value>] [-d] [-h] [-n <value>] [-E] class-pattern [method-pattern]                                                 

 SUMMARY:                                                                                                                                                     Search the method of classes loaded by JVM                                                                                                              

 EXAMPLES:                                                                                                                                                    sm java.lang.String                                                                                                                                        sm -d org.apache.commons.lang.StringUtils                                                                                                                  sm -d org/apache/commons/lang/StringUtils                                                                                                                  sm *StringUtils *                                                                                                                                          sm -Ed org\\.apache\\.commons\\.lang\.StringUtils .*                                                                                                    

 WIKI:                                                                                                                                                        https://arthas.aliyun.com/doc/sm                                                                                                                        

 OPTIONS:                                                                                                                                                   -c, --classloader <value>                           The hash code of the special class's classLoader                                                           --classLoaderClass <value>                      The class name of the special class's classLoader.                                                     -d, --details                                       Display the details of method                                                                          -h, --help                                          this help                                                                                              -n, --limits <value>                                Maximum number of matching classes (100 by default)                                                    -E, --regex                                         Enable regular expression to match (wildcard matching by default)                                      <class-pattern>                                     Class name pattern, use either '.' or '/' as separator                                                 <method-pattern>                                    Method name pattern   

sm [-c <value>] [--classLoaderClass <value>] [-d] [-h] [-n <value>] [-E] class-pattern [method-pattern]

使用:

sm -d com.codog.demo.Main generateWord

[arthas@91969]$ sm -d com.codog.demo.Main generateWord declaring-class  com.codog.demo.Main                                                                                                                       method-name      generateWord                                                                                                                              modifier         public,static                                                                                                                             annotation                                                                                                                                                 parameters       java.lang.String                                                                                                                          return           java.lang.String                                                                                                                          exceptions                                                                                                                                                 classLoaderHash  3d4eac69                                                                                                                                 

Affect(row-cnt:1) cost in 24 ms.

jad com.codog.demo.Main generateWord

[arthas@91969]$ jad com.codog.demo.Main generateWord

ClassLoader:                                                                                                                                               +-jdk.internal.loader.ClassLoaders$AppClassLoader@3d4eac69                                                                                                   +-jdk.internal.loader.ClassLoaders$PlatformClassLoader@761bf405                                                                                          

Location:                                                                                                                                                  /Users/bytedance/IdeaProjects/demotemp/target/classes/                                                                                                     

       public static String generateWord(String type) {/*10*/     switch (type) {               case "宝,我今天输液了; 输的什么液?": {/*11*/             return "想你的夜";               }               case "宝，我今天喝酒了; 喝的什么酒": {/*12*/             return "和你的天长地久";               }               case "宝，我今天种地了; 种的什么地": {/*13*/             return "对你的死心塌地";               }           }/*14*/     return "";       }

Affect(row-cnt:1) cost in 393 ms.