The LLDB Debugger
LLDB is a next generation, high-performance debugger. It is built as a set of reusable components which highly leverage existing libraries in the larger LLVM Project, such as the Clang expression parser and LLVM disassembler.LLDB is the default debugger in Xcode on Mac OS X and supports debugging C, Objective-C and C++ on the desktop and iOS devices and simulator.All of the code in the LLDB project is available under the standard LLVM License, an open source "BSD-style" license.
LLDB currently converts debug information into clang types so that it can leverage the clang compiler infrastructure. This allows LLDB to support the latest C, C++, Objective C and Objective C++ language features and runtimes in expressions without having to reimplement any of this functionality. It also leverages the compiler to take care of all ABI details when making functions calls for expressions, when disassembling instructions and extracting instruction details, and much more.
The major benefits include:
Up to date language support for C, C++, Objective C
Multi-line expressions that can declare local variables and types
Utilize the JIT for expressions when supported
Evaluate expression Intermediate Representation (IR) when JIT can't be used