here are several different tactics to trace openjdk from systemtap. The first relies on sys/sdt.h dtrace-style markers compiled into the JVM, but not dbgsym data: % stap -L 'process("/usr/lib/jvm/java*/jre/lib/*/server/libjvm.so").mark("*&q…
up vote17down votefavorite 8 As a sysadmin I sometimes face situations, where a program behaves abnormally, while not creating errors at all or creating nonsense error-messages. In the past - before java came in - there were two counter-measures: If…
a linux trace/probe tool. 官网:https://sourceware.org/systemtap/ 用户空间 SystemTap探测用户空间程序需要utrace的支持,3.5以上的内核版本默认支持. 对于3.5以下的内核版本,需要自己打相关补丁. 更多信息:http://sourceware.org/systemtap/wiki/utrace 需要: debugging information for the named program utrace support i…
a linux trace/probe tool. 官网:https://sourceware.org/systemtap/ 探测点 SystemTap脚本主要是由探测点和探测点处理函数组成的,来看下都有哪些探测点可用. The essential idea behind a systemtap script is to name events, and to give them handlers. Systemtap works by translating the script to C,…
a linux trace/probe tool. 官网:https://sourceware.org/systemtap/ 简介 SystemTap是我目前所知的最强大的内核调试工具,有些家伙甚至说它无所不能:) (1) 发展历程 Debuted in 2005 in Red Hat Enterprise Linux 4 Update 2 as a technology preview. After four years in development, System 1.0 was relea…