linux下jdb远程调试tomcat源码

jdb远程调试tomcat

• 在tomcat打开调试设置jvm参数

  -Xrunjdwp:transport=dt_socket,server=y,address=9090,suspend=y
  

• 在linux命令行jdb连接9090端口

  jdb -attach ip:9090 -sourcepath /softwares/apache-tomcat-7.0.40-src/java
  

• 设置断点

  stop at org.apache.tomcat.util.IntrospectionUtils:402
  stop at org.apache.tomcat.util.IntrospectionUtils:406
  stop at org.apache.tomcat.util.IntrospectionUtils:408
  stop at org.apache.tomcat.util.IntrospectionUtils:412 
  

• 执行程序

  main[1] run
  > Set deferred breakpoint org.apache.tomcat.util.IntrospectionUtils:412
  Set deferred breakpoint org.apache.tomcat.util.IntrospectionUtils:412
  Set deferred breakpoint org.apache.tomcat.util.IntrospectionUtils:408
  Unable to set deferred breakpoint org.apache.tomcat.util.IntrospectionUtils:406 
  
  
  : No code at line 406 in org.apache.tomcat.util.IntrospectionUtils
  
  
  Stopping due to deferred breakpoint errors.
  Set deferred breakpoint org.apache.tomcat.util.IntrospectionUtils:402
  
  
  Breakpoint hit: 
  Breakpoint hit: "thread=main", 
  
  
  org.apache.tomcat.util.IntrospectionUtils.setProperty(), line=412 bci=849
  412                ExceptionUtils.handleThrowable(ie.getCause());
  

• 打印变量

  main[1] locals
  Method arguments:
  o = instance of x.x.x.JNDIRealm(id=1156) 
  name = "connectionPassword"
  value = "1234"
  invokeSetProperty = true
  Local variables:
  setter = "setConnectionPassword"
  ie = instance of java.lang.reflect.InvocationTargetException(id=1160)
  main[1] dump ie.target 
   ie.target = {
      serialVersionUID: -7034897190745766939
      java.lang.Exception.serialVersionUID: -3387516993124229948
      java.lang.Throwable.serialVersionUID: -3042686055658047285
      java.lang.Throwable.detailMessage: "password decrypt is error!"
      java.lang.Throwable.cause: instance of java.lang.RuntimeException(id=1163)
      java.lang.Throwable.stackTrace: null
  }
  

• 打印变量dump信息

  main[1] dump ie.target.cause
  ie.target.cause = {
      serialVersionUID: -7034897190745766939
      java.lang.Exception.serialVersionUID: -3387516993124229948
      java.lang.Throwable.serialVersionUID: -3042686055658047285
      java.lang.Throwable.detailMessage: "get content from cyberark error"
      java.lang.Throwable.cause: instance of 
  
  
  javapasswordsdk.exceptions.PSDKException(id=1165)
      java.lang.Throwable.stackTrace: null
  }
  

• ctrl+c 退出

  main[1]