lldb

LLVM debugger

TLDR

Debug executable

$ lldb [program]

Debug with arguments

$ lldb -- [program] [arg1] [arg2]

Attach to process

$ lldb -p [pid]

Attach by name

$ lldb -n [process_name]

Run commands on start

$ lldb -o "[breakpoint set -n main]" [program]

Load core dump

$ lldb -c [core] [program]

SYNOPSIS

lldb [options] [program] [-- args]

lldb is the LLVM debugger. It debugs C, C++, Objective-C, and Swift programs.The tool provides breakpoints, watchpoints, stepping, and memory inspection. It's the default debugger on macOS and is part of the Xcode developer tools.

PARAMETERS

PROGRAM

Executable to debug.

-p PID

Attach to process by PID.

-n NAME

Attach to process by name.

-c CORE

Load core dump file.

-o CMD

Execute command on start.

-s FILE

Source commands from file after loading.

-O CMD

Execute command before loading the file.

-f FILE

Specify executable to debug.

-a ARCH

Specify architecture to use when launching the program.

-w

Wait for a process to launch with the name given by -n.

-x

Don't automatically parse .lldbinit files.

-h, --help

Display help information.

-v, --version

Display version information.

CAVEATS

Requires debug symbols (-g flag at compile time). Commands differ from gdb; see `lldb` `help` or the GDB-to-LLDB command map. Part of the LLVM toolchain.

HISTORY

LLDB was developed by Apple as part of LLVM, providing a modern debugger with modular architecture.