Explore code coverage instrumentation techniques in this 50-minute conference talk from the 2015 JVM Language Summit. Delve into topics such as DecCode Coverage, Skybar, Stack Map Frames, and Java C Bug. Learn about exploratory coverage, snapshots, and comparative coverage analysis. Gain insights into dead code detection and future developments in the field. Presented by Eirik Bjorsnos, this talk offers valuable knowledge for language designers, compiler writers, tool builders, runtime engineers, and VM architects interested in advancing JVM technologies.