linux下jdb远程调试tomcat源码

最新推荐文章于 2025-01-18 00:37:32 发布

yangjun2

最新推荐文章于 2025-01-18 00:37:32 发布

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本文介绍如何使用jdb进行Tomcat远程调试。通过配置JVM参数启动Tomcat，并利用jdb连接到指定端口设置断点进行调试。示例展示了如何在特定行设置断点并打印变量。

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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]
```