instrumentation
2 free lessons tagged instrumentation across Programming. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.
How Profilers Work, and How to Read a Flame Graph
A profiler is not a neutral observer: sampling and instrumentation see different things, distort the program in different ways, and answer different questions. This lesson covers how each works, why CPU time and wall-clock time give opposite answers, and how to read a flame graph correctly, including the axis that means nothing and is misread constantly.
Dynamic analysis and debuggers
Reverse engineering by running the binary. Why dynamic analysis sees what static cannot, how debuggers and breakpoints actually work (INT3 vs hardware vs page-fault), tracing (strace, ltrace, dtrace, eBPF), dynamic binary instrumentation with Frida and PIN, the common anti-debug tricks, sandboxing with Unicorn and Qiling, and the static-dynamic loop that does the real work.