LLVM
WWDC 2019 - Debugging in Xcode 11
WWDC 2019 - What's New in Clang and LLVM
WWDC 2019 - Getting Started with Xcode
WWDC 2018 - Advanced Debugging with Xcode and LLDB
WWDC 2018 - What's New in LLVM
WWDC 2017 - What's New in LLVM
WWDC 2016 - What's New in LLVM
The LLVM compiler infrastructure project is a set of compiler and toolchain technologies.
The LLDB Debugger is the debugger component of the LLVM project.