JVM Bytecode Verification: The JVMS Compliance Process
Understanding the Java Virtual Machine Specification compliance: bytecode verification phases, type checking, stack overflow prevention, and security guarantees.
Posts in technical
JVMTI Agents: Profiling and Debugging with the JVM Tool Interface
Explore the JVM Tool Interface for building profiling, debugging, and monitoring agents that hook deep into the JVM runtime.
Method Invocation Bytecode
Deep dive into JVM method invocation: invokevirtual, invokestatic, invokespecial, invokeinterface, and invokedynamic explained per the JVM Specification.
Java 9 Module System: Boundaries, Encapsulation, and requires/exports
A guide to the Java 9 Module System covering module boundaries, strong encapsulation, the requires and exports directives, and practical migration patterns.
Runtime Data Areas: Heap, Stack, and Method Area Internals
Understanding JVM memory architecture: Heap, JVM Stack, Method Area, PC Registers, and Native Method Stacks - what they store and how they interact.
Java Security Manager: Permission Checks and Policy Files
A deep dive into the Java Security Manager, policy file configuration, permission checks, and how to properly sandbox untrusted code in the JVM.
Serial vs Parallel GC: Throughput-Focused Collectors
A practical guide to Serial and Parallel garbage collectors - how they work, when to use each, throughput trade-offs, and production tuning tips.
JVM Stack Walking API: Fast Stack Traversal and Security Context
A guide to the JVM Stack Walking API showing how to efficiently traverse stack frames, access local variables, and extract security context without the overhead of traditional stack trace capture.
Java Synchronization Primitives: synchronized, wait/notify, and Locks
Understanding Java synchronization: synchronized blocks, wait/notify, ReentrantLock, ReadWriteLock, StampedLock, and common concurrency patterns.
Java Thread Lifecycle: States, start, yield, sleep, interrupt, join
Understanding Java thread lifecycle management: thread states, start, yield, sleep, interrupt, join, daemon threads and common pitfalls.