Week 1, 2021: Bug-out Bag Essentials

🔗 Pre-Discussion Learning Material

• A Guide to Undefined Behavior in C and C++, Part 1
  • read this first, it gives a good definition for undefined behavior (which the talk lacks)
  • focus on reading up to the “Type 1 Functions” section (although the subsequent sections are worth a skim)
• CppCon 2017: Piotr Padlewski “Undefined Behaviour is awesome!”

🔗 Warmup

• Geoguessr

🔗 Topics

1. C++ & Undefined behavior
   • Matthew Andres Moreno
   • code snippet: memory unsafe
   • code snippet: dangling reference
   • code snippet: dangling pointer
   • code snippet: bad puns
2. Empirical debugging tools
   • Charles Ofria
3. Using gdb
   • Matthew
   • compile with -g flag
   • info locals (print info about local variables)
   • bt (backtrace)
   • b (set a breakpoint)
   • list (print source code around current location)
   • __LINE__ and __FILE__
4. Using valgrind
   • Santiago
   • Memory leak
   • Double free
   • Out-of-bounds write in heap
   • clang’s sanitizers