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kleines Filmröllchen 2fcb713037 LibThreading: Overhaul thread behavior with ThreadState 
This replaces all state-related variables with a single ThreadState.
These are simplified over what the Kernel has, but capture all
userspace-available thread state.

Locking the state behind an atomic and using proper atomic operations
also gets rid of quite some deadlocks and race conditions that have
existed around m_tid and others beforehand.

In terms of behavior, this introduces the following changes:
- All thread state mishandling (e.g. joining a detached thread) crashes
  the program. Mishandling thread state is a severe kind of concurrency
  bug that might also be indeterministic, so letting it silently
  disappear with the return value of pthread_ APIs is a bad idea. The
  thread state can always be checked beforehand to ensure that no crash
  happens.
- Destructing a still-running thread will crash in AK/Function, so the
  Thread destructor issues its own warning for debugging purposes.
- Thread issues warnings before crashes in many places to aid
  concurrency debugging (the most difficult kind of debugging).
- Joining dead but not detached threads is legal, as per POSIX APIs.
- The thread ID is never reset to 0 after the thread has been started
  and subsequently been assigned a valid thread ID. The thread's exit
  state is still obtainable.
- Detaching threads that are about to exit is considered a programming
  bug and will often (not always, as we can't catch all execution
  sequences involved in such a situation) crash the program on purpose.
  If you want to detach a thread that will definitely exit on its own,
  you have to prevent it from exiting before detach() was called (e.g.
  with an "exit requested" flag).
2022-12-11 19:07:20 -07:00
.devcontainer Meta: Add devcontainer configuration for use with Github Codespaces 2022-11-25 18:41:21 -07:00
.github CI: Fix commit linting for multi-line commit messages 2022-12-10 17:52:26 +00:00
AK AK: Specialise AK::is() for NNRP<T> 2022-12-11 20:44:54 +03:30
Base Base: Add a quote to the fortunes database 2022-12-11 11:32:29 +00:00
Documentation Documentation: Describe extra clang tools built alongside BuildClang.sh 2022-12-10 03:00:24 -07:00
Kernel Kernel: Allow dead threads to be joined 2022-12-11 19:07:20 -07:00
Meta sql: Support running the sql REPL on Lagom 2022-12-11 10:08:17 -05:00
Ports AK+Everywhere: Rename String to DeprecatedString 2022-12-06 08:54:33 +01:00
Tests AK: Add LexicalPath::is_child_of 2022-12-11 16:05:23 +00:00
Toolchain Toolchain: Add libxcrypt to serenity.nix 2022-11-13 19:38:14 +00:00
Userland LibThreading: Overhaul thread behavior with ThreadState 2022-12-11 19:07:20 -07:00
.clang-format Meta: Switch to clang-format-15 as the standard formatter 2022-12-03 23:52:23 +00:00
.clang-tidy Meta: Disable readability-use-anyofallof clang-tidy check 2022-01-09 23:29:57 -08:00
.editorconfig Meta: Add .editorconfig 2022-09-10 17:32:55 +01:00
.gitattributes Repository: Protect port patches from CRLF/LF normalization 2022-01-12 01:08:38 +01:00
.gitignore Meta: Ignore vim's .exrc config 2022-10-06 16:06:50 +01:00
.mailmap Meta: Add mattco98's full name to mailmap 2022-11-23 17:13:49 +00:00
.pre-commit-config.yaml Meta: Add a post-commit commit message linter hook 2021-05-02 16:28:01 +02:00
.prettierignore LibJS: Handle empty named export 2022-09-02 02:07:37 +01:00
.prettierrc Meta: Move prettier config files to the root of the repository 2020-08-24 18:21:33 +02:00
.ycm_extra_conf.py Meta: Make YCM work when the current dir is not the root of the tree 2022-10-30 23:57:25 +01:00
azure-pipelines.yml CI: Disallow test failures on macOS Lagom :^) 2022-01-14 22:39:06 +01:00
CMakeLists.txt Toolchain: Update LLVM to 15.0.3 2022-10-24 15:33:58 +02:00
CONTRIBUTING.md Documentation: Describe extra clang tools built alongside BuildClang.sh 2022-12-10 03:00:24 -07:00
LICENSE Meta: Update year range in LICENSE :^) 2022-01-02 18:08:02 +01:00
README.md Meta: Add Gregory Bertilson to the contributors list :^) 2022-11-30 10:12:11 +01:00
SECURITY.md Meta: Add a security policy 2022-06-29 03:29:27 +00:00

README.md

SerenityOS

Graphical Unix-like operating system for x86 computers.

GitHub Actions Status Azure DevOps Status Fuzzing Status Sonar Cube Static Analysis Discord

About

SerenityOS is a love letter to '90s user interfaces with a custom Unix-like core. It flatters with sincerity by stealing beautiful ideas from various other systems.

Roughly speaking, the goal is a marriage between the aesthetic of late-1990s productivity software and the power-user accessibility of late-2000s *nix. This is a system by us, for us, based on the things we like.

You can watch videos of the system being developed on YouTube:

FAQ: Frequently Asked Questions

Screenshot

Screenshot as of b36968c.png

Features

  • Modern x86 32-bit and 64-bit kernel with pre-emptive multi-threading
  • Browser with JavaScript, WebAssembly, and more (check the spec compliance for JS, CSS, and WASM)
  • Security features (hardware protections, limited userland capabilities, W^X memory, pledge & unveil, (K)ASLR, OOM-resistance, web-content isolation, state-of-the-art TLS algorithms, ...)
  • System services (WindowServer, LoginServer, AudioServer, WebServer, RequestServer, CrashServer, ...) and modern IPC
  • Good POSIX compatibility (LibC, Shell, syscalls, signals, pseudoterminals, filesystem notifications, standard Unix utilities, ...)
  • POSIX-like virtual file systems (/proc, /dev, /sys, /tmp, ...) and ext2 file system
  • Network stack and applications with support for IPv4, TCP, UDP; DNS, HTTP, Gemini, IMAP, NTP
  • Profiling, debugging and other development tools (Kernel-supported profiling, detailed program analysis with software emulation in UserspaceEmulator, CrashReporter, interactive GUI playground, HexEditor, HackStudio IDE for C++ and more)
  • Libraries for everything from cryptography to OpenGL, audio, JavaScript, GUI, playing chess, ...
  • Support for many common and uncommon file formats (PNG, JPEG, GIF, MP3, WAV, FLAC, ZIP, TAR, PDF, QOI, Gemini, ...)
  • Unified style and design philosophy, flexible theming system, custom (bitmap and vector) fonts
  • Games (Solitaire, Minesweeper, 2048, chess, Conway's Game of Life, ...) and demos (CatDog, Starfield, Eyes, mandelbrot set, WidgetGallery, ...)
  • Every-day GUI programs and utilities (Spreadsheet with JavaScript, TextEditor, Terminal, PixelPaint, various multimedia viewers and players, Mail, Assistant, Calculator, ...)

... and all of the above are right in this repository, no extra dependencies, built from-scratch by us :^)

Additionally, there are over two hundred ports of popular open-source software, including games, compilers, Unix tools, multimedia apps and more.

How do I read the documentation?

Man pages are available online at man.serenityos.org. These pages are generated from the Markdown source files in Base/usr/share/man and updated automatically.

When running SerenityOS you can use man for the terminal interface, or help for the GUI.

Code-related documentation can be found in the documentation folder.

How do I build and run this?

See the SerenityOS build instructions. Serenity runs on Linux, macOS (aarch64 might be a challenge), Windows (with WSL2) and many other *Nixes with hardware or software virtualization.

Get in touch and participate!

Join our Discord server: SerenityOS Discord

Before opening an issue, please see the issue policy.

A general guide for contributing can be found in CONTRIBUTING.md.

Authors

And many more! See here for a full contributor list. The people listed above have landed more than 100 commits in the project. :^)

License

SerenityOS is licensed under a 2-clause BSD license.