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Checked C

Supporting the development of Checked C, an extension to C for writing more secure and reliable C programs.
README.md

Helping developers write more secure systems code

About Checked C

Checked C extends C with bounds checking and improved type-safety. This helps developers write more secure systems code.

  • It is opt-in and backwards compatible. As a developer, you add annotations and/or modify types to opt-in to bounds checking and type-safety.
  • All existing C code is valid Checked C code.
  • It supports incremental conversion of code. You can convert a few security-critical functions or your entire program, and do the conversion as you have time.
  • It supports annotations that can be erased from your program using macros, so that your Checked C code can compile with C compilers that do not understand Checked C annotations.

Checked C includes a language specification, samples, a compiler, and 3C, a tool for translating existing C code to Checked C.

About the Project

The language specification and compiler were developed at Microsoft from 2015-2021. The Checked C effort now continues as an active open-source research project. Recent contributions include:

  • The 3C tool for translating C to Checked C (Aravind Machiry, Mike Hicks and others). A paper on this tool appeared in OOPSLA '22 and won a Distinguished Paper award.
  • Fat-pointers for temporal safety (Jie Zhou, John Criswell, and Mike Hicks). This work will appear in the upcoming OOPSLA ’23 conference.
  • Support for erasing annotations for C compilers that don’t support Checked C (in progress).
  • Experiments with converting open-source systems code.

As of 2023, we're officially a non-profit! This supports continuity of the project beyond any one person, helps us keep track of intellectual property rights, and will let us raise funds so support project activities.

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  1. checkedc checkedc Public

    Checked C is an extension to C that lets programmers write C code with bounds checking and improved type-safety. The goal is to let people easily make their existing C code type-safe and eliminate …

    C 3.2k 185

  2. checkedc-clang checkedc-clang Public

    This repo contains a version of clang that is being modified to support Checked C. Checked C is an extension to C that lets programmers write C code that is guaranteed by the compiler to be type-safe.

    C++ 504 78

Repositories

Showing 10 of 15 repositories
  • checkedc Public

    Checked C is an extension to C that lets programmers write C code with bounds checking and improved type-safety. The goal is to let people easily make their existing C code type-safe and eliminate entire classes of errors.

    checkedc/checkedc’s past year of commit activity
    C 3,219 185 72 0 Updated Oct 7, 2024
  • checkedc-clang Public

    This repo contains a version of clang that is being modified to support Checked C. Checked C is an extension to C that lets programmers write C code that is guaranteed by the compiler to be type-safe.

    checkedc/checkedc-clang’s past year of commit activity
    C++ 504 78 161 1 Updated Oct 5, 2024
  • checkedc-fork Public archive

    This was a fork of Checked C used from 2021-2024. The changes have been merged into the original Checked C repo.

    checkedc/checkedc-fork’s past year of commit activity
    C 26 3 68 0 Updated Sep 30, 2024
  • checkedc-llvm-project Public

    This was a fork of Checked C clang used from 2021-2024. The changes have been merged into the original Checked C clang repo, which is now at https://github.com/checkedc/checkedc-clang.

    checkedc/checkedc-llvm-project’s past year of commit activity
    C++ 14 19 167 2 Updated Sep 30, 2024
  • workflows Public

    Checked C workflows for GitHub Actions

    checkedc/workflows’s past year of commit activity
    Shell 0 0 1 0 Updated Sep 24, 2024
  • checkedc-libc-test Public

    This repo contains a version of libc-test that is modified to test a Checked C version of the musl C library. Checked C is an extension to C that adds checking to detect or prevent common programming errors such as out-of-bounds memory accesses.

    checkedc/checkedc-libc-test’s past year of commit activity
    C 0 0 0 0 Updated Aug 22, 2024
  • checkedc-musl Public

    This repo contains a version of musl that is being modified to Checked C. Checked C is an extension to C that adds checking to detect or prevent common programming errors such as out-of-bounds memory accesses.

    checkedc/checkedc-musl’s past year of commit activity
    C 0 0 0 0 Updated Aug 22, 2024
  • checkedc-parson Public

    This is modified version of parson that uses the Checked C extension to C. Parson is a lightweight json parsing library.

    checkedc/checkedc-parson’s past year of commit activity
    C 0 0 0 0 Updated Aug 22, 2024
  • .github Public
    checkedc/.github’s past year of commit activity
    0 0 0 0 Updated Nov 26, 2023
  • checkedc-llvm-test-suite Public
    checkedc/checkedc-llvm-test-suite’s past year of commit activity
    C 0 0 1 0 Updated Jul 29, 2023
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