Sireum: A High-Assurance System Engineering Platform

Sireum Kekinian is the most recent evolution of the Sireum platform whose core components are being built using the Sireum programming language -- Slang.

Slang is an OO/FP programming language with contract and proof languages designed for formal verification and analyses; that is, it serves as the basis for the next generation Logika verifier and proof checker, as well as for other formal method-based analysis techniques. It is currently a subset of Scala 2.x with different memory models enabled via Scala's macro and compiler plugin facilities, with support for IntelliJ.

With the exception of a small part of its runtime library and its parser that uses scalameta, the runtime library and the Slang codebase itself (and analyses on top of it) are written using Slang.

Slang programs run on the JVM (Java 8+), in the browser or Node.js (via Scala.js Javascript translation), and natively via Graal and also via compilation to C. The generated C code is both Slang source-traceable and in the form that is structurally close to the Slang source; in addition to gcc and clang, it can also be compiled using the CompCert Verified C Compiler to provide a high-assurance toolchain for program correctness down to machine code.

Installing

Sireum is available as pre-built binaries/installers or from source. The main advantage of using the source distribution is that updates can be done incrementally while the binary distribution requires complete re-installation. On the other hand, source distribution requires more setup.

Binary Distributions

Sireum binary distribution files are 7z self-extracting archives (SFX) with command-line installers to (optionally) configure where Sireum should be installed.

Below are the installation instructions for 64-bit (amd64) macOS, Linux, and Windows (or, one can simply download the distribution files from the GitHub releases page and extract them using a program capable of uncompressing 7z archive).

• macOS: run the following command in a terminal:

  (sd=sireum-dev-mac.sfx && curl -JLo $sd -c /dev/null http://mac.distro.sireum.org && chmod +x $sd && p=$(pwd) && cd /tmp && $p/$sd)

• Linux: download and run sireum-dev-linux.sfx, or run the following command in a terminal if you have curl installed:

  (sd=sireum-dev-linux.sfx && curl -JLo $sd -c /dev/null http://linux.distro.sireum.org && chmod +x $sd && p=$(pwd) && cd /tmp && $p/$sd)

• Windows: download and run sireum-dev-win.exe

If you want to ensure that the downloaded files are genuine, download the appropriate Minisign signature files for the specific platforms for macOS, Linux, and Windows, then run:

minisign -P RWShRZe/1tMRHAcQ2162Wq5FhU2ptktJdQxzUxvK0MwVjDYRC4JY87Fb -Vm <installer-file>

Alternatively, you can also use a port of OpenBSD's signify for your operating system (e.g., signify-openbsd in Ubuntu) instead of minisign as follows:

signify-openbsd -V -p sireum.pub -x <installer-file>.minisig -m <installer-file>

where sireum.pub's content is:

untrusted comment: Sireum
RWShRZe/1tMRHAcQ2162Wq5FhU2ptktJdQxzUxvK0MwVjDYRC4JY87Fb

Git Source Distribution

Requirements:

• macOS: none

• Linux: curl and git

• Windows: Developer Mode enabled and git (Git For Windows, MSYS2, or Cygwin)

Setup

In a console terminal:

• macOs/Linux:

  git clone --recursive https://github.com/sireum/kekinian
  kekinian/bin/build.cmd setup  # for non-POSIX shell, prefix with sh

• Windows:

  git clone --recursive https://github.com/sireum/kekinian
  kekinian\bin\build.cmd setup

Set the SIREUM_HOME env var to the kekinian path above.

To update later on, simply do a git pull --recurse-submodules and re-run build.cmd setup (or simply build.cmd to rebuild Sireum CLI tools).

If rebuilding Sireum somehow failed, try cleaning the repo:

• macOS/Linux:

  ${SIREUM_HOME}/bin/clean.sh

• Windows:

  %SIREUM_HOME%\bin\clean.bat

and re-run build.cmd setup.

Using Sireum IVE

Slang Script Example Project

To generate a "hello world" Slang script project in the current directory and launch Sireum IVE:

• macOS:

  # Generates ./hello project directory with ./hello/src/script.sc
  ${SIREUM_HOME}/bin/sireum tools ivegen .
  open ${SIREUM_HOME}/bin/mac/idea/IVE.app

• Linux:

  # Generates ./hello project directory with ./hello/src/script.sc
  ${SIREUM_HOME}/bin/sireum tools ivegen .
  ${SIREUM_HOME}/bin/linux/idea/bin/IVE.sh

• Windows:

  REM Generates .\hello project directory with .\hello\src\script.sc
  %SIREUM_HOME%\bin\sireum.bat tools ivegen . 
  cmd /C %SIREUM_HOME%\bin\win\idea\bin\IVE.exe

Once Sireum IVE is running, open the hello directory as a project, then open the script.sc file for editing. (When asked to add Ammonite dependencies, choose Ignore for now; you can add the dependencies but it might take a while to download the packages.)

To run the script, click on the green ► button at the top-left part of the editor (or click on the green ► button on the right side of "Run script.sc" at the top-right part of the window).

Learning Slang

If you would like to learn Slang quickly, you can read and use the IVE to experiment with several examples designed to highlight various Slang language features:

https://github.com/sireum/slang-by-examples

Slang App Example Mill Project

To generate a "hello world" Slang app project in the current directory and launch Sireum IVE:

• macOS:

  # Generates ./hello-app project directory with ./hello-app/hello-app/src/app.scala
  ${SIREUM_HOME}/bin/sireum tools ivegen -m mill -n hello-app .

• Linux:

  # Generates ./hello-app project directory with ./hello-app/hello-app/src/app.scala
  ${SIREUM_HOME}/bin/sireum tools ivegen -m mill -n hello-app .

• Windows:

  REM Generates .\hello-app project directory with .\hello-app\hello-app\src\app.scala
  %SIREUM_HOME%\bin\sireum.bat tools ivegen -m mill -n hello-app . 

Open the hello-app directory as a project in Sireum IVE, open the app.scala file for editing. To run it, click on the green ► button near the definition of object app in the editor.

Note that mill (or mill.bat under Windows) is available under the bin directory of SIREUM_HOME.

Sireum Kekinian Development

Sireum is best developed (browsed/edited) by using Sireum IVE itself. The build.cmd setup command above setup IVE for Sireum development. If you want to re-run just the IVE project re-generation, do the following in a terminal:

• macOS/Linux:

  ${SIREUM_HOME}/bin/build.cmd project

• Windows:

  %SIREUM_HOME%\bin\build.cmd project

Then open the SIREUM_HOME directory as a project in Sireum IVE.

To have the codebase and its test suites recompiled upon changes, run:

• macOS/Linux:

  cd ${SIREUM_HOME} && bin/mill -w cli.tests.compile

  and to build its assembly/CLI tool:

  ${SIREUM_HOME}/bin/build.cmd

• Windows:

  cd %SIREUM_HOME% && bin\mill.bat -w cli.tests.compile

  and to build its assembly/CLI tool:

  %SIREUM_HOME%\bin\build.cmd

Sireum Native Executable

It is recommended to compile Sireum and its Slash build scripts to native as it speeds up build tasks.

First, install GraalVM native-image's prerequisites (note: native-image for Windows requires Visual Studio 2017 or 2019); then, to build Sireum native executable:

• macOS/Linux:

  ${SIREUM_HOME}/bin/build.cmd native

• Windows:

  • Visual Studio 2017 Community

    call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
    %SIREUM_HOME%\bin\build.cmd native

  • Visual Studio 2019 Community

    call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
    %SIREUM_HOME%\bin\build.cmd native

To run:

• macOS:

  ${SIREUM_HOME}/bin/mac/sireum

• Linux:

  ${SIREUM_HOME}/bin/linux/sireum

• Windows:

  %SIREUM_HOME%\bin\win\sireum.exe

Note that once the native version is available (and has a newer timestamp), sireum and sireum.bat in bin call the native version. This is also similar for build.cmd in bin and bin/mill-build/bin.