webassembly-feature | Test if a WebAssembly feature | Binary Executable Format library

by xtuc JavaScript Version: 1.3.0 License: MIT

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kandi X-RAY | webassembly-feature Summary

webassembly-feature is a JavaScript library typically used in Programming Style, Binary Executable Format applications. webassembly-feature has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can install using 'npm i webassembly-feature' or download it from GitHub, npm.

Test if a WebAssembly feature is supported

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Security

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Support

webassembly-feature has a low active ecosystem.

It has 17 star(s) with 0 fork(s). There are 5 watchers for this library.

It had no major release in the last 12 months.

webassembly-feature has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of webassembly-feature is 1.3.0

Quality

webassembly-feature has 0 bugs and 0 code smells.

Security

webassembly-feature has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

webassembly-feature code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

webassembly-feature is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

webassembly-feature releases are not available. You will need to build from source code and install.

Deployable package is available in npm.

Installation instructions, examples and code snippets are available.

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webassembly-feature Key Features

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webassembly-feature Examples and Code Snippets

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Community Discussions

Trending Discussions on webassembly-feature

Debugging experimental WebAssembly externref bug in Google Chrome

QUESTION

Debugging experimental WebAssembly externref bug in Google Chrome

Asked 2020-Dec-12 at 02:18

Warning: as the reference types proposal isn't complete yet, this code will not run without toggling flags or setting in order to enable executing experimental code.

If you are on Google Chrome or a Chromium browser, you will need to enable the following flag: chrome://flags/#enable-experimental-webassembly-features

I had set up a simple handwritten Wasm module for personal use. I could've easily written it in JavaScript, but it was easier and made more sense to use Wasm, and since it was a simple, personal script, I wouldn't care if other people couldn't run it.

I had compiled it using wabt's wat2wasm.

The Wasm module was intended to be fed the entire globalThis object to import from. From there, it took four TypedArray constructors: Uint8Array, Uint16Array, Uint32Array, and BigUint64Array.

Take note: no code was executed prior to the Wasm, thus there cannot be any interference.

Later, I had realized that that the Wasm wasn't working as intended at all, my math was correct, but the variables were wrong.

I had narrowed my problem down to just this:

...

ANSWER

Answered 2020-Dec-12 at 02:18

This was a compiler bug fixed by Chromium in https://chromium-review.googlesource.com/c/v8/v8/+/2551100.

This was the response that I had gotten from one of the developers:

This is indeed a timing issue that has been fixed in https://chromium-review.googlesource.com/c/v8/v8/+/2551100. The problem happens when there are only imported globals, and compilation of the WebAssembly functions finishes before the stream actually finishes. In this case, the offset calculation happens after the compiler uses the offsets, and therefore produces incorrect code.

A workaround is to define one global that is not imported, as this causes the offset calculation to happen earlier.

Seems like sending a small module that only imports globals instead of functions was breaking the code.

Their code had a threading race condition between the stream and the compiler.

Source https://stackoverflow.com/questions/64757646

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install webassembly-feature

You can install using 'npm i webassembly-feature' or download it from GitHub, npm.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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