arthas/tutorials/katacoda/command-dump-en/dump.md

Dump the bytecode for the particular classes to the specified directory.

Options

Name	Specification
class-pattern	class name pattern
[c:]	hashcode of the class loader that loaded the target class
[d:]	set the destination directory for class files
[E]	turn on regex match, the default behavior is wild card match

Usage

dump java.lang.String{{execute T2}}

$ dump java.lang.String
 HASHCODE  CLASSLOADER  LOCATION
 null                   /Users/admin/logs/arthas/classdump/java/lang/String.class
Affect(row-cnt:1) cost in 119 ms.

dump demo.*{{execute T2}}

$ dump demo.*
 HASHCODE  CLASSLOADER                                    LOCATION
 3d4eac69  +-sun.misc.Launcher$AppClassLoader@3d4eac69    /Users/admin/logs/arthas/classdump/sun.misc.Launcher$AppClassLoader-3d4eac69/demo/MathGame.class
             +-sun.misc.Launcher$ExtClassLoader@66350f69
Affect(row-cnt:1) cost in 39 ms.

dump -d /tmp/output java.lang.String{{execute T2}}

$ dump 
 HASHCODE  CLASSLOADER  LOCATION
 null                   /tmp/output/java/lang/String.class
Affect(row-cnt:1) cost in 138 ms.