也可以通过JVM参数配置OOM时自动dump当前内存镜像文件。 -XX:+HeapDumpOnOutOfMemoryError 和-XX:HeapDumpPath所代表的含义就是当程序出现OutofMemory时,将会在相应的目录下生成一份dump文件,而如果不指定选项-XX:HeapDumpPath则在当前目录下生成dump文件。 确保应用发生 OOM 时 JVM 能够保存并 dump 出当前的内存镜...
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-XX:OnOutOfMemoryError="<cmd args>;<cmd args>" 当首次遭遇OOM时执行自定义命令 -XX:-PrintClassHistogram 遇到Ctrl-Break后打印类实例的柱状信息,与jmap -histo功能相同 -XX:-PrintConcurrentLocks 遇到Ctrl-Break后打印并发锁的相关信息,与jstack -l功能相同 -XX:-PrintCommandLineFlags 打印在命令行中出现...
Standard Streams are a feature of many operating systems. By default, they read input from the keyboard and write output to the display. They also support I/O on files and between programs, but that feature is controlled by the command line interpreter, not the program. The Java platform su...
The extra boolean argument, when set to 'true', tells the parser to recognize all the sub-commands it detected. For each properly recognized sub-command, itsrun()method, if exists, would be called, in the order they appeared on the command line. ...
The -XX:OnError Option When a fatal error occurs, the Java HotSpot VM can optionally execute a user-supplied script or command. The script or command is specified using the-XX:OnError=stringcommand-line option, wherestringis a single command, or a list of commands separated by semicolons....
The-Xcheck:jnioption is added to the command line that starts the application, as in the following example. java -Xcheck:jni MyApplication The-Xcheck:jnioption causes the VM to do additional validation on the arguments passed to JNI functions. Note that the option is not guaranteed to find ...
Learn how to create a Java function from the command line, then publish the local project to serverless hosting in Azure Functions.
通过这段代码可以看出,首先通过lookup_agent_on_load来加载Agent并且找到Agent_OnLoad函数,这个函数是Agent的入口函数。如果没找到这个函数,则认为是加载了一个不合法的Agent,则什么也不做,否则调用这个函数,这样Agent的代码就开始执行起来了。对于使用Java Instrumentation API来编写Agent的方式来说,在解析阶段观察到在...
其中第一位数字代表信息的详细级别(0,1,2,3,4),级别越高代表信息越详细;接下来的两个字符是段标题的缩写,比如,“CI” 代表 “Command-line interpreter”,“CL” 代表 “Class loader”,“LK” 代表 “Locking”,“ST” 代表 “Storage”,“TI” 代表 “Title”,“XE” 代表 “Execution engine”等等;...