gdb.md

Debugging with GDB

Compile your program with -g flag and run your program using gdb: gdb yourprogname. From there, you can debug using GDB commands. Use help to list commands and their options.

Break

?inline Set a breakpoint to pause execution at a certain line or a function:

• break main
• b 42

Run

?inline Run your program inside gdb after setting breakpoints:

• run
• r

Print

?inline Print value of expression:

• print my_var
• p (char) ch

Walk & Step

?inline Execute next line of code, where next stays in the function and step enters functions:

• n
• s

Continue

?inline Continue execution until (Nth) next breakpoint

• continue
• c 3

Backtrace

?inline Print backtrace of all or N stack frames:

• backtrace -full
• bt 3

Learn More:

• TCCPPCon#1: Debugging with GDB
• How to Debug Using GDB
• GDB Step By Step Instruction
• GDB Cheatsheet

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