Title: Open Heart Surgery: HotSpot Debugging at the OS Level Abstract: Debugging Java applications is comfortable and simple, but if you want to look beyond the Java horizon, you need special knowledge and and different tools. This interactive session shows you how to debug a running VM or analyze a VM core file with a native debugger like gdb. You will also learn how to use some of the more than 1,200 VM options to trace or modify the VM behavior. This knowledge can greatly help you identify, isolate and reproduce the root cause of hard VM crashes, and it can also be pure fun to see which actual machine instruction the CPU is executing for your Java code. Bio: Volker Simonis works for SAP in the SAP JVM Technology group. He is an OpenJDK contributor from the very beginning and helped SAP and the SAP JVM team engage in the OpenJDK project. He's the project lead of the OpenJDK PowerPC/AIX porting project, a JDK8 committer and JDK9 reviewer. Recording me on audio and/or video is acceptable This session requires a 45min slot. Thank you and best regards, Volker