1. Intro to Debugging Marwan H. Hussein, TA B.Sc., Systems & Biomedical Engineering Department, Cairo University Egypt SBE201 – Data Structures and Algorithms in C

2. Contents Potential of debugging Features of a typical debugger

3. Potential of debugging Imagine there’s a big code that you want to know many intermediate values of its variables while its running.. You can use printf() several time, but this is going to be time consuming

4. A Debugger A debugger is a program (separate from the compiler & linker) that allows you to run your binaries while giving you the ability of a ProgramCntr!! Like compilers, many debuggers exist: – VS debugger – GNU debugger (what we gonna use  open source)

5. Abilities of a debugger Continuous running – But stopping @ breakpoints Single stepping – Step over – Step into – Step out Function call stack Several other things (advanced) Let’s see this in Eclipse

6. drills For pointers on 32-bit OS – Why pointer values appear in 8 numbers? For call stack What you think this is ??

7. Gdb shortcuts BuildCtrl+b Toggle breakpointCtrl+Shift+b debugF11 resumeF8 Step overF6 Step intoF5 Step outF7 terminateCtrl+F2