LLDB(1)

🎀 NAME 🎀

lldb — the manual page for lldb 12, aka the debugger that's gonna hold your hand while your code does its little chaos dance 💖

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✨ DESCRIPTION ✨

OVERVIEW: LLDB 🦋

USAGE:

lldb [options]

okay bestie so here's the whole vibe. LLDB is the debugger, and it's got a lot of ways to be launched. Let's go mode by mode, no skipping, no cap 👑

🫶 ATTACHING

like, what if the program is already running and you just wanna slide in 😌

• --attach-name <name> — tells the debugger to attach to a process with the given name.
• --attach-pid <pid> — tells the debugger to attach to a process with the given pid.
• -n <value> — alias for --attach-name.
• -p <value> — alias for --attach-pid.
• --wait-for — tells the debugger to wait for a process with the given pid or name to launch before attaching. patient queen energy 🧚
• -w — alias for --wait-for.

💅 COMMANDS

the "do this stuff automatically" section, she's organized, she's iconic:

• --batch — tells the debugger to run the commands from -s, -S, -o & -O, and then quit.
• -b — alias for --batch.
• -K <value> — alias for --source-on-crash.
• -k <value> — alias for --one-line-on-crash.
• --local-lldbinit — allow the debugger to parse the .lldbinit files in the current working directory, unless --no-lldbinit is passed.
• --no-lldbinit — do not automatically parse any .lldbinit files.
• --one-line-before-file <command> — tells the debugger to execute this one-line lldb command before any file provided on the command line has been loaded.
• --one-line-on-crash <command> — when in batch mode, tells the debugger to run this one-line lldb command if the target crashes. 💀
• --one-line <command> — tells the debugger to execute this one-line lldb command after any file provided on the command line has been loaded.
• -O <value> — alias for --one-line-before-file.
• -o <value> — alias for --one-line.
• -Q — alias for --source-quietly.
• --source-before-file <file> — tells the debugger to read in and execute the lldb commands in the given file, before any file has been loaded.
• --source-on-crash <file> — when in batch mode, tells the debugger to source this file of lldb commands if the target crashes.
• --source-quietly — tells the debugger to execute this one-line lldb command before any file has been loaded.
• --source <file> — tells the debugger to read in and execute the lldb commands in the given file, after any file has been loaded.
• -S <value> — alias for --source-before-file.
• -s <value> — alias for --source.
• -x — alias for --no-lldbinit.

🌈 OPTIONS

the main menu, the whole buffet, every single one, periodt:

• --arch <architecture> — tells the debugger to use the specified architecture when starting and running the program.
• -a <value> — alias for --arch.
• --capture-path <filename> — tells the debugger to use the given filename for the reproducer.
• --capture — tells the debugger to capture a reproducer.
• --core <filename> — tells the debugger to use the full path to <filename> as the core file.
• -c <value> — alias for --core.
• --debug — tells the debugger to print out extra information for debugging itself. debugception fr fr 🙈
• -d — alias for --debug.
• --editor — tells the debugger to open source files using the host's "external editor" mechanism.
• -e — alias for --editor.
• --file <filename> — tells the debugger to use the file <filename> as the program to be debugged.
• -f <value> — alias for --file.
• --help — prints out the usage information for the LLDB debugger.
• -h — alias for --help.
• --no-use-colors — do not use colors.
• --replay <filename> — tells the debugger to replay a reproducer from <filename>.
• --reproducer-generate-on-exit — generate reproducer on exit.
• --reproducer-no-generate-on-signal — don't generate reproducer when a signal is received.
• --reproducer-no-verify — disable the reproducer verification.
• --reproducer-no-version-check — disable the reproducer version check.
• --version — prints out the current version number of the LLDB debugger.
• -v — alias for --version.
• -X — alias for --no-use-color.

🦋 REPL

read-eval-print-loop time, we're just vibing in a little interactive bubble ✨

• -r=<flags> — alias for --repl=<flags>.
• --repl-language <language> — chooses the language for the REPL.
• --repl=<flags> — runs lldb in REPL mode with a stub process with the given flags.
• --repl — runs lldb in REPL mode with a stub process.
• -R <value> — alias for --repl-language.
• -r — alias for --repl.

🍓 SCRIPTING

for when you wanna script the debugger itself, main character behavior 💜

• -l <value> — alias for --script-language.
• --python-path — prints out the path to the lldb.py file for this version of lldb.
• -P — alias for --python-path.
• --script-language <language> — tells the debugger to use the specified scripting language for user-defined scripts.

👑 EXAMPLES

The debugger can be started in several modes.

Passing an executable as a positional argument prepares lldb to debug the given executable. To disambiguate between arguments passed to lldb and arguments passed to the debugged executable, arguments starting with a - must be passed after --.

lldb --arch x86_64 /path/to/program program argument -- --arch armv7

For convenience, passing the executable after -- is also supported.

lldb --arch x86_64 -- /path/to/program program argument --arch armv7

Passing one of the attach options causes lldb to immediately attach to the given process.

lldb -p <pid>
lldb -n <process-name>

Passing --repl starts lldb in REPL mode.

lldb -r

Passing --core causes lldb to debug the core file.

lldb -c /path/to/core

Command options can be combined with these modes and cause lldb to run the specified commands before or after events, like loading the file or crashing, in the order provided on the command line.

lldb -O 'settings set stop-disassembly-count 20' -o 'run' -o 'bt'
lldb -S /source/before/file -s /source/after/file
lldb -K /source/before/crash -k /source/after/crash

Note: In REPL mode no file is loaded, so commands specified to run after loading the file (via -o or -s) will be ignored. 😭 don't say I didn't warn you.

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and that's the whole page bestie, you made it, I'm so proud 🫶✨ this was lldb 12, dated February 2022, and it's the LLDB(1) manual — go forth and debug, you absolute icon 💅👑