Learn LLDB in 1 minute

A no nonsense recipe for using LLDB

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Introduction

For some reason most tutorials do not cover straight away the most common debugging case:

1. load the program,
2. set a breakpoint,
3. run it,
4. inspect variables,
5. go step by step,
6. continue until next breakpoint and
7. repeat.

LLDB in 1 minute

1. Ensure that you are compiling for debugging. I use -g -O0 as $CFLAGS in my makefile.
2. Launch the debugger: lldb myprogram
3. Set up the breakpoint for a function named read_tokens present in file tokens.c: breakpoint set -name extract_tokes
4. Set the command line arguments: settings set target.run-args file.txt
5. Run the program: run
6. Inspect a variable with p I (where i is the name of the variable).
7. Continue the execution with continue.

More advanced use cases

See the many bloated tutorials in the internet.