Truly independent web browser
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Aliaksandr Kalenik ceaeea3c26 RequestServer: Use write notifier instead of busy waiting for socket
...to become writable.

Solves triangular deadlock problem that happened in the following case
(copied from https://github.com/LadybirdBrowser/ladybird/issues/1816):
- The WebContent process is spinning on
   `send_sync_but_allow_failure` waiting for the UI process to respond
- The UI process is spinning on `send_sync_but_allow_failure`, waiting
   for RequestServer to respond
- RequestServer is stuck in this loop, trying to write to the
  WebContent's socket file (when I attach to RS, we are always in the
  sched_yield call, so we're spinning on EAGAIN).

For me the issue was reliably reproducible on Google Maps and with this
change we no longer deadlock there.
2025-05-24 16:28:48 +03:00
.devcontainer Devcontainer: Update to llvm 20 2025-05-14 19:43:52 -04:00
.github Meta: Lint python files with black 2025-05-22 16:21:42 +02:00
AK AK: Add initial support for AK testsuite on Windows 2025-05-20 10:58:43 -06:00
Base/res LibWebView: Disable autocomplete when search is disabled 2025-05-11 11:48:02 -04:00
Documentation LibWeb/CSS: Correct how we evaluate boolean media-features 2025-05-23 10:17:58 +01:00
Libraries LibCore: Atomically ref-count SharedSingleProducerCircularQueue guts 2025-05-24 06:52:25 -06:00
Meta Meta: Avoid doublequote strings nested in fstrings in ladybird.py 2025-05-23 10:27:34 -04:00
Services RequestServer: Use write notifier instead of busy waiting for socket 2025-05-24 16:28:48 +03:00
Tests LibWeb/CSS: Avoid calling to_font_weight() when serializing font 2025-05-24 13:35:30 +01:00
Toolchain Meta+Toolchain: Extract BuildVcpkg to an importable function 2025-05-22 12:21:24 -04:00
UI headless-browser: Allow specifying the path to the saved screenshot 2025-05-20 10:48:03 -04:00
Utilities AK: Add initial support for AK testsuite on Windows 2025-05-20 10:58:43 -06:00
.clang-format Meta: Enforce newlines around namespaces 2025-05-14 02:01:59 -06:00
.clang-tidy Meta: Disable clang-tidy “implicit-bool-conversion” check 2025-01-24 09:25:37 +01:00
.clangd Meta: Change the default build directories to exclude "ladybird" prefix 2024-11-06 10:38:57 -07:00
.editorconfig
.gitattributes LibGfx: Remove support for the various "portable" image formats 2024-06-17 21:57:35 +02:00
.gitignore Meta: Add build command to ladybird.py 2025-05-21 11:35:20 -06:00
.gn
.mailmap Meta: Update my e-mail address everywhere 2024-10-04 13:19:50 +02:00
.pre-commit-config.yaml Meta: Replace deprecated pre-commit stage name 2024-10-18 09:40:59 +02:00
.prettierignore Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
.prettierrc
.swift-format Meta: Add swift-format configuration 2024-07-30 18:38:02 -06:00
.ycm_extra_conf.py Everywhere: Format all python files with black 2025-05-22 16:21:42 +02:00
CMakeLists.txt CMake: Remove duplicate sanitizer configuration 2025-05-14 02:05:12 -06:00
CMakePresets.json Meta: Add build command to ladybird.py 2025-05-21 11:35:20 -06:00
CODE_OF_CONDUCT.md Meta: Add code of conduct (from the Ruby community) 2024-10-02 09:49:52 +02:00
CONTRIBUTING.md Documentation: Fix Ladybird's documentation url 2025-05-20 15:53:48 -04:00
ISSUES.md Docs: Add info about --enable-idl-tracing flag 2025-01-15 13:25:35 +00:00
LICENSE Meta: Update license year 2025-02-10 11:40:57 +00:00
pyproject.toml Meta: Lint python files with black 2025-05-22 16:21:42 +02:00
README.md Libraries: Remove LibArchive 2024-11-25 13:37:45 +01:00
SECURITY.md Documentation: Make updates to align better with new issue template 2024-10-31 09:18:08 +01:00
vcpkg-configuration.json Meta: Add overlay port for vulkan-loader 2024-07-07 15:56:59 +02:00
vcpkg.json Revert "Meta: Update skia to version 134" 2025-05-24 06:55:15 -06:00

Ladybird

Ladybird is a truly independent web browser, using a novel engine based on web standards.

Important

Ladybird is in a pre-alpha state, and only suitable for use by developers

Features

We aim to build a complete, usable browser for the modern web.

Ladybird uses a multi-process architecture with a main UI process, several WebContent renderer processes, an ImageDecoder process, and a RequestServer process.

Image decoding and network connections are done out of process to be more robust against malicious content. Each tab has its own renderer process, which is sandboxed from the rest of the system.

At the moment, many core library support components are inherited from SerenityOS:

  • LibWeb: Web rendering engine
  • LibJS: JavaScript engine
  • LibWasm: WebAssembly implementation
  • LibCrypto/LibTLS: Cryptography primitives and Transport Layer Security
  • LibHTTP: HTTP/1.1 client
  • LibGfx: 2D Graphics Library, Image Decoding and Rendering
  • LibUnicode: Unicode and locale support
  • LibMedia: Audio and video playback
  • LibCore: Event loop, OS abstraction layer
  • LibIPC: Inter-process communication

How do I build and run this?

See build instructions for information on how to build Ladybird.

Ladybird runs on Linux, macOS, Windows (with WSL2), and many other *Nixes.

How do I read the documentation?

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

Get in touch and participate!

Join our Discord server to participate in development discussion.

Please read Getting started contributing if you plan to contribute to Ladybird for the first time.

Before opening an issue, please see the issue policy and the detailed issue-reporting guidelines.

The full contribution guidelines can be found in CONTRIBUTING.md.

License

Ladybird is licensed under a 2-clause BSD license.