Status

macOS

LLDB is the system debugger on macOS, iOS, tvOS, and watchOS and can be used for C, C++, Objective-C and Swift development for x86_64, i386, ARM, and AArch64 debugging. The entire public API is exposed through a macOS framework which is used by Xcode and the lldb command line tool. It can also be imported from Python. The entire public API is exposed through script bridging which allows LLDB to use an embedded Python script interpreter, as well as having a Python module named “lldb” which can be used from Python on the command line. This allows debug sessions to be scripted. It also allows powerful debugging actions to be created and attached to a variety of debugging workflows.

Linux

LLDB is improving on Linux. While the debugserver has not been ported (to enable remote debugging) Linux is nearing feature completeness with Darwin to debug x86_64 programs, and is partially working with i386 programs. ARM architectures on Linux are untested. For more details, see the Features by OS section below.

FreeBSD

LLDB on FreeBSD lags behind the Linux implementation but is improving rapidly. For more details, see the Features by OS section below.

Windows

LLDB on Windows is still under development, but already useful for i386 programs (x86_64 untested) built with DWARF debug information, including postmortem analysis of minidumps. For more details, see the Features by OS section below.

Features Matrix

Feature FreeBSD Linux macOS Windows
Backtracing OK OK OK OK
Breakpoints OK OK OK OK
C++11: OK OK OK Unknown
Commandline lldb tool OK OK OK OK
Core file debugging OK (ELF) OK (ELF) OK (MachO) OK (Minidump)
Debugserver (remote debugging) Not ported Not ported OK Not ported
Disassembly OK OK OK OK
Expression evaluation Unknown Works with some bugs OK Works with some bugs
JIT debugging Unknown Symbolic debugging only Untested No
Objective-C 2.0: Unknown Not applicable OK Not applicable