LLDB is a 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 macOS and supports debugging C, Objective-C and C++ on the desktop and iOS devices and simulator.
The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and converts it into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer. It also contains basic regression tests.
C-like languages use the Clang front end. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode — and from there into object files, using LLVM.
Other components include: the libc++ C++ standard library, the LLD linker, and more.
- Provides the middle layers of a complete compiler system, taking intermediate representation (IR) code from a compiler and emitting an optimized IR.
- Generate relocatable machine code at compile-time or link-time or even binary machine code at run-time.
- Supports a language-independent instruction set and type system.
- LVM JIT compiler can optimize unneeded static branches out of a program at runtime.
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