Native Client (NaCl) is an open-source technology that allows native machine code to run securely sandboxed in the browser. Two layers of sandboxing, a static verification inner sandbox combined with Chrome’s outer process sandbox, ensure users can safely run untrusted applications. Portable Native Client builds on this foundation by providing a portable LLVM IR derived wire format which is seamlessly compiled and run on the fly. Support for venerable, cornerstone POSIX APIs—files, processes, sockets, terminal I/O— is then built on top of an I/O layer called PPAPI with security limitations that mirror the constraints of Javascript.

Come learn about: porting Clang/LLVM to Native Client, bridging the gap between POSIX and the Web, measuring performance, and connecting Clang/LLVM with other FOSS tools in our in-browser development environment, including editors, interpreters, and build tools. Watch a demonstration of in-browser C/C++ development to discover how the Web can dramatically increase the reach and impact of the LLVM project by frictionlessly putting its tools in the hands of developers and users everywhere.