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
2025-02-10 11:40:57 +00:00
2024-11-25 13:37:45 +01:00

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.

Description
Truly independent web browser ladybird.org
Readme BSD-2-Clause 356 MiB
Languages
C++ 60.6%
HTML 25%
JavaScript 12.4%
CMake 0.6%
Python 0.3%
Other 1%