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Truly independent web browser
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davidot 830ea0414c LibJS: Make scoping follow the spec 
Before this we used an ad-hoc combination of references and 'variables'
stored in a hashmap. This worked in most cases but is not spec like.
Additionally hoisting, dynamically naming functions and scope analysis
was not done properly.

This patch fixes all of that by:
  - Implement BindingInitialization for destructuring assignment.
  - Implementing a new ScopePusher which tracks the lexical and var
    scoped declarations. This hoists functions to the top level if no
    lexical declaration name overlaps. Furthermore we do checking of
    redeclarations in the ScopePusher now requiring less checks all over
    the place.
  - Add methods for parsing the directives and statement lists instead
    of having that code duplicated in multiple places. This allows
    declarations to pushed to the appropriate scope more easily.
  - Remove the non spec way of storing 'variables' in
    DeclarativeEnvironment and make Reference follow the spec instead of
    checking both the bindings and 'variables'.
  - Remove all scoping related things from the Interpreter. And instead
    use environments as specified by the spec. This also includes fixing
    that NativeFunctions did not produce a valid FunctionEnvironment
    which could cause issues with callbacks and eval. All
    FunctionObjects now have a valid NewFunctionEnvironment
    implementation.
  - Remove execute_statements from Interpreter and instead use
    ASTNode::execute everywhere this simplifies AST.cpp as you no longer
    need to worry about which method to call.
  - Make ScopeNodes setup their own environment. This uses four
    different methods specified by the spec
    {Block, Function, Eval, Global}DeclarationInstantiation with the
    annexB extensions.
  - Implement and use NamedEvaluation where specified.

Additionally there are fixes to things exposed by these changes to eval,
{for, for-in, for-of} loops and assignment.

Finally it also fixes some tests in test-js which where passing before
but not now that we have correct behavior :^).
2021-09-30 08:16:32 +01:00
.github Meta: Explicitly disable caching in the Sonar Cloud workflow 2021-09-28 10:58:09 +02:00
AK RequestServer: Use an OwnPtr for cached connections 2021-09-29 11:47:18 +02:00
Base PixelPaint: Add new icons for layer actions 2021-09-29 20:04:20 +02:00
Documentation Documentation: Add texinfo to build instructions 2021-09-30 02:56:21 +00:00
Kernel Kernel/PCI: Remove all macros and replace them with enum classes 2021-09-29 11:24:33 +02:00
Meta LibJS: Convert internal_own_property_keys() to ThrowCompletionOr 2021-09-29 23:49:53 +01:00
Ports Ports: Remove unnecessary patch from the neofetch port 2021-09-24 10:48:30 +02:00
Tests LibJS + test-js: Get results from the global object directly 2021-09-30 08:16:32 +01:00
Toolchain Ports: Add Ruby 3.0.2 2021-09-24 10:04:47 +02:00
Userland LibJS: Make scoping follow the spec 2021-09-30 08:16:32 +01:00
.clang-format Meta: Update .clang-format to not indent nested namespaces 2020-03-14 10:10:21 +01:00
.gitattributes Meta: Mark the other image file formats as binary in .gitattributes 2021-05-20 08:04:28 +02:00
.gitignore Meta: Add run-local.sh 2021-08-07 11:47:07 +02:00
.mailmap Meta: Add my new serenityos.org email to .mailmap :^) 2021-09-18 23:58:23 +02:00
.pre-commit-config.yaml Meta: Add a post-commit commit message linter hook 2021-05-02 16:28:01 +02:00
.prettierignore LibJS: Allow Unicode escape sequences in identifiers 2021-08-19 23:49:25 +02:00
.prettierrc Meta: Move prettier config files to the root of the repository 2020-08-24 18:21:33 +02:00
azure-pipelines.yml CI: Batch master builds in Azure DevOps to help with CI latency 2021-09-12 18:41:57 +00:00
CMakeLists.txt Meta: Switch to a SuperBuild that splits host and target builds 2021-09-15 19:04:52 +04:30
CONTRIBUTING.md Meta: Add Idan Horowitz as a project maintainer :^) 2021-09-07 22:16:25 +02:00
LICENSE Everywhere: Use "the SerenityOS developers." in copyright headers 2021-04-29 00:59:26 +02:00
README.md Meta: Add Mustafa Quraish to the contributors list :^) 2021-09-13 22:21:57 +02:00

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.

I (Andreas) regularly post raw hacking sessions and demos on my YouTube channel.

Sometimes I write about the system on my github.io blog.

I'm also on Patreon and GitHub Sponsors if you would like to show some support that way.

Screenshot

Screenshot as of b36968c.png

Kernel features

  • x86 (32-bit) and x86_64 (64-bit) kernel with pre-emptive multi-threading
  • Hardware protections (SMEP, SMAP, UMIP, NX, WP, TSD, ...)
  • IPv4 stack with ARP, TCP, UDP and ICMP protocols
  • ext2 filesystem
  • POSIX signals
  • Purgeable memory
  • /proc filesystem
  • Pseudoterminals (with /dev/pts filesystem)
  • Filesystem notifications
  • CPU and memory profiling
  • SoundBlaster 16 driver
  • VMWare/QEMU mouse integration

System services

  • Launch/session daemon (SystemServer)
  • Compositing window server (WindowServer)
  • Text console manager (TTYServer)
  • DNS client (LookupServer)
  • Network protocols server (RequestServer and WebSocket)
  • Software-mixing sound daemon (AudioServer)
  • Desktop notifications (NotificationServer)
  • HTTP server (WebServer)
  • Telnet server (TelnetServer)
  • DHCP client (DHCPClient)

Libraries

  • C++ templates and containers (AK)
  • Event loop and utilities (LibCore)
  • 2D graphics library (LibGfx)
  • OpenGL 1.x compatible library (LibGL)
  • GUI toolkit (LibGUI)
  • Cross-process communication library (LibIPC)
  • HTML/CSS engine (LibWeb)
  • JavaScript engine (LibJS)
  • Markdown (LibMarkdown)
  • Audio (LibAudio)
  • Digital Signal Processing/Synthesizer Chains (LibDSP)
  • PCI database (LibPCIDB)
  • Terminal emulation (LibVT)
  • Out-of-process network protocol I/O (LibProtocol)
  • Mathematical functions (LibM)
  • ELF file handling (LibELF)
  • POSIX threading (LibPthread)
  • Higher-level threading (LibThreading)
  • Transport Layer Security (LibTLS)
  • HTTP and HTTPS (LibHTTP)
  • IMAP (LibIMAP)

Userland features

  • Unix-like libc and userland
  • Shell with pipes and I/O redirection
  • On-line help system (both terminal and GUI variants)
  • Web browser (Browser)
  • C++ IDE (HackStudio)
  • Desktop synthesizer (Piano)
  • E-mail client (Mail)
  • Various desktop apps & games
  • Color themes

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.

How do I build and run this?

See the SerenityOS build instructions

Before opening an issue

Please see the issue policy.

FAQ: Frequently Asked Questions

Get in touch

Join our Discord server: SerenityOS Discord

Author

Contributors

(And many more!) The people listed above have landed more than 100 commits in the project. :^)

License

SerenityOS is licensed under a 2-clause BSD license.