dump
dump已加载类的字节码到特定目录
| 命令选项 | 描述 |
|---|---|
| -c, --code <hash> | 指定ClassLoader的哈希值 |
| --classLoaderClass <name> | 指定ClassLoader的类名 |
| -d, --directory <path> | dump字节码的路径 |
| -l, --limit <number> | 限制dump字节码类的个数，默认50 |
| -E, --regex | 开启正则表达式匹配，默认是通配符匹配 |
| -h, --help | 帮助 |
| <class-pattern> | 类模式字符串 |
示例
# dump指定类及其所有子类 不指定目录默认在home/logs目录
[arthas@14064]$ dump java.util.concurrent.locks.ReentrantLock
HASHCODE CLASSLOADER LOCATION
null C:\Users\A\logs\arthas\classdump\java\util\concurrent\locks\ReentrantLock.class
null C:\Users\A\logs\arthas\classdump\java\util\concurrent\ConcurrentHashMap$Segment.class
# 指定目录dump
[arthas@14064]$ dump -d /tmp java.util.concurrent.locks.ReentrantLock
# 指定ClassLoader dump 这里指定的Arthas的ClassLoader
[arthas@14064]$ dump -d /tmp -c 435181e6 java.util.List
HASHCODE CLASSLOADER LOCATION
435181e6 +-com.taobao.arthas.agent.ArthasClassloader@435181e6 C:\Users\A\logs\arthas\classdump\com.taobao.arthas.agent.ArthasClassloader-435181e6\org\benf\
+-jdk.internal.loader.ClassLoaders$PlatformClassLoader@782458af cfr
eader\bytecode\analysis\parse\wildcard\WildcardMatch$ListWildcard.class
435181e6 +-com.taobao.arthas.agent.ArthasClassloader@435181e6 C:\Users\A\logs\arthas\classdump\com.taobao.arthas.agent.ArthasClassloader-435181e6\com\aliba
+-jdk.internal.loader.ClassLoaders$PlatformClassLoader@782458af ba\arthas\deps\ch\qos\logback\core\util\COWArrayList.class
435181e6 +-com.taobao.arthas.agent.ArthasClassloader@435181e6 C:\Users\A\logs\arthas\classdump\com.taobao.arthas.agent.ArthasClassloader-435181e6\org\benf\
+-jdk.internal.loader.ClassLoaders$PlatformClassLoader@782458af cfr
eader\bytecode\analysis\types\StackTypes.class
435181e6 +-com.taobao.arthas.agent.ArthasClassloader@435181e6 C:\Users\A\logs\arthas\classdump\com.taobao.arthas.agent.ArthasClassloader-435181e6\com\aliba
+-jdk.internal.loader.ClassLoaders$PlatformClassLoader@782458af ba\arthas\deps\ch\qos\logback\classic\spi\TurboFilterList.class