Johannes Bechberger
Debugging Unveiled: Exploring Debugger Internals and Hidden Gems
#1about 5 minutes
Why debuggers are an essential developer tool
Debugging helps find and fix bugs, analyze code, add logging, and change behavior on the fly.
#2about 4 minutes
Understanding the Java Platform Debugger Architecture (JPDA)
The JPDA consists of the Java Debug Interface (JDI), the Java Debug Wire Protocol (JDWP), and the JVM Tool Interface (JVMTI) to connect an IDE to a JVM.
#3about 4 minutes
Exploring on-demand and remote debugging features
Use remote debugging to connect to any JVM and leverage on-demand features like starting a debug session when a specific exception is thrown.
#4about 12 minutes
A deep dive into the Java Debug Wire Protocol (JDWP)
The JDWP facilitates communication between the debugger and the JVM through a series of requests, events, and replies to manage state and execution.
#5about 7 minutes
How conditional breakpoints are emulated by the IDE
Since the JVM lacks native support, IDEs emulate conditional breakpoints by suspending the thread at every hit and evaluating the condition on the client side.
#6about 6 minutes
Optimizing conditions and the impact on JIT compilation
Improve performance by embedding complex conditions in the code or a separate method, and be aware that setting any breakpoint de-optimizes the method.
#7about 6 minutes
How features like HotSwap and Force Return are implemented
Features like HotSwap, setting values, and forcing returns are implemented using specific JDWP commands that directly instruct the JVM to modify its state.
#8about 15 minutes
Key takeaways and Q&A on debugger internals
A summary of debugging best practices is followed by a Q&A session covering topics like cross-language debugging and future trends like Project Loom.
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From learning to earning
Jobs that call for the skills explored in this talk.
Java Backend Entwickler/in - Berlin - (German speaking)
Tech Solutions Gmbh
€65-75K
Java
Amazon DynamoDB
Amazon Web Services (AWS)