v86
virgil
Our great sponsors
v86 | virgil | |
---|---|---|
153 | 29 | |
19,127 | 893 | |
- | - | |
9.1 | 9.2 | |
1 day ago | 7 days ago | |
Rust | Shell | |
BSD 2-clause "Simplified" License | - |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
v86
- Run Windows on the browser with WASM power
-
WASI 0.2.0 and Why It Matters
> As a thought experiment, we're almost there! We could technically have `win95.img + bochs86vm.wasm + autorun.inf + msword.exe` wrapped in a "browser evaluator"
I looked into this and... holy crap! We are there. Not for modern programs quite yet, sure, but this is amazing. You can use Windows 2000 from your browser.
https://copy.sh/v86/?profile=windows2000
-
Is offline-first not enough? Do we need "serverfree"?
I think you are looking for Shadow.
https://shadow.goose.icu
Or just the whole kitchen sink. Why not?
http://copy.sh/v86/?profile=windows98
- Virtual Computer Museum – VNC into Archaic Windows Systems
-
Container2wasm: Convert Containers to WASM Blobs
Also: https://github.com/copy/v86 - more productized browser x86 runtime, used by eg https://github.com/snaplet/postgres-wasm
-
Show HN: SQL Polyglot
Wonder if you could put all those databases in a Linux image and boot it using v86 [0], eliminating the need for a server.
[0] https://github.com/copy/v86
- Hot Dog Linux
-
Kolibri OS: fits on a floppy disk, programmed using interrupts
Trying it out in https://copy.sh/v86/?profile=kolibrios , it's also clearly a love letter to Windows 95 in particular. That could be an unstated goal here, create a very particular PC experience under very particular constraints. I don't know anything about the creator but it's very possible that this kind of work was actually their career in the 90s.
It's incredible how much work was done. Maybe this should be an internet curiosity like how TempleOS has become, though Terry's personality was a unique factor.
-
VMware is now part of Broadcom
hmm, why would people still use VMWare? Isn't vbox open source, or even things such as https://copy.sh/v86/ would do most virtualization trick now days?
-
Running Windows 98 on the Browser
Oh, there are more OSes one can use at the parent page:
https://copy.sh/v86/
My highlights:
- First version of Windows (1.01)
- SerenityOS <3
- and even ReactOS
virgil
-
Garbage Collection for Systems Programmers
For (2) Virgil has several features that allow you to layout memory with various levels of control. I assume you meaning "array of structs", and you can do that with arrays of tuples, which will naturally be flattened and normalized based on the target (i.e. will be array-of-structs on native targets). You can define byte-exact layouts[1] (mostly for interfacing with other software and parsing binary formats), unbox ADTs, and soon you can even control the exact encoding of ADTs.
Virgil is GC'd.
[1] https://github.com/titzer/virgil/blob/master/doc/tutorial/La...
-
The Return of the Frame Pointers
Virgil doesn't use frame pointers. If you don't have dynamic stack allocation, the frame of a given function has a fixed size can be found with a simple (binary-search) table lookup. Virgil's technique uses an additional page-indexed range that further restricts the lookup to be a few comparisons on average (O(log(# retpoints per page)). It combines the unwind info with stackmaps for GC. It takes very little space.
The main driver is in (https://github.com/titzer/virgil/blob/master/rt/native/Nativ... the rest of the code in the directory implements the decoding of metadata.
I think frame pointers only make sense if frames are dynamically-sized (i.e. have stack allocation of data). Otherwise it seems weird to me that a dynamic mechanism is used when a static mechanism would suffice; mostly because no one agreed on an ABI for the metadata encoding, or an unwind routine.
I believe the 1-2% measurement number. That's in the same ballpark as pervasive checks for array bounds checks. It's weird that the odd debugging and profiling task gets special pleading for a 1% cost but adding a layer of security gets the finger. Very bizarre priorities.
-
Whose baseline (compiler) is it anyway?
This paper is the first time I seen mention of the Virgil programming language, from the same author:
https://github.com/titzer/virgil
-
JEP 450: Compact Object Headers
JavaScript handles the "no identity hash" with WeakMap and WeakSet, which are language built-ins. For Virgil, I chose to leave out identity hashes and don't really regret it. It keeps the language simple and the separation clear. HashMap (entirely library code, not a language wormhole) takes the hash function and equality function as arguments to the constructor.
[1] https://github.com/titzer/virgil/blob/master/lib/util/Map.v3
This is partly my style too; I try to avoid using maps for things unless they are really far flung, and the things that end up serving as keys in one place usually end up serving as keys in lots of other places too.
-
Retrofitting null-safety onto Java at Meta
Whoa, interesting. I didn't know Kotlin had all those constructs.
In Virgil, a method on an object (or ADT) can declare its return type as "this". Then the method implicitly returns the receiver object. That trick is very useful to allow a chain of calls such as object.foo().bar().baz(). I find it readable and easy to explain:
https://github.com/titzer/virgil/blob/master/doc/tutorial/Re...
-
A Ruby program that generates itself (through a 128-language quine loop)
I hadn't written one until ~30 mins ago [1]. I cheated and looked at a Java quine (not particularly elegant, but easy to see what is going on.), but I wrote one for Virgil. Just think string substitution; a string with a hole in it and you substitute a copy of the string, quoted into the hole. Just one substitution suffices.
[1] https://github.com/titzer/virgil/blob/master/apps/Quine/Quin...
-
Integer Conversions and Safe Comparisons in C++20
Virgil has a family of completely well-defined (i.e. no UB) fixed-size integer types with some hard-fought rules that I eventually got around to documenting here:
https://github.com/titzer/virgil/blob/master/doc/tutorial/Fi...
One of the key things is that values are never silently truncated (other than 2's-complement wrap-around) or values changed; only promotions. The only sane semantics for over-shifts (shifts larger than the size of the type) is to shift the bits out, like a window.
The upshot of all that is that Virgil has a pretty sane semantics for fixed-size integers, IMHO.
-
Show HN: We are trying to (finally) get tail-calls into the WebAssembly standard
LLVM and other compilers that use SSA but target a stack machine can run a stackification phase. Even without reordering instructions, it seems to work well in practice.
In Virgil I implemented this for both the JVM and Wasm. Here's the algorithm used for Wasm:
https://github.com/titzer/virgil/blob/master/aeneas/src/mach...
-
Hacker News top posts: Jul 2, 2022
Virgil: A fast and lightweight programming language that compiles to WASM\ (54 comments)
- Virgil: A fast and lightweight programming language that compiles to WASM
What are some alternatives?
Chicago95 - A rendition of everyone's favorite 1995 Microsoft operating system for Linux.
vigil - Vigil, the eternal morally vigilant programming language
webvm - Virtual Machine for the Web
libratbag - A DBus daemon to configure input devices, mainly high-end and gaming mice
yoroi-frontend - Yoroi Wallet - Cardano ADA Wallet - Your gateway to the financial world (extension frontend)
rust-asn1 - A Rust ASN.1 (DER) serializer.
Electron - :electron: Build cross-platform desktop apps with JavaScript, HTML, and CSS
kcachegrind - GUI to profilers such as Valgrind
macos-virtualbox - Push-button installer of macOS Catalina, Mojave, and High Sierra guests in Virtualbox on x86 CPUs for Windows, Linux, and macOS
Solaar - Linux device manager for Logitech devices
uBlock-issues - This is the community-maintained issue tracker for uBlock Origin
spec - WebAssembly specification, reference interpreter, and test suite.