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WebAssembly

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WebAssembly
Paradigmstructured; stack machine[1]
Designed byW3C
Developer
First appearedMarch 2017; 7 years ago (2017-03)
OSPlatform independent
LicenseApache License 2.0
Filename extensions
  • .wat (text format)
  • .wasm (binary format)
Websitewebassembly.org
Influenced by

WebAssembly (Wasm) defines a portable binary-code format and a corresponding text format for executable programs[2] as well as software interfaces for facilitating communication between such programs and their host environment.[3][4][5][6]

The main goal of WebAssembly is to facilitate high-performance applications on web pages, but it is also designed to be usable in non-web environments.[7] It is an open standard[8][9] intended to support any language on any operating system,[10] and in practice many of the most popular languages already have at least some level of support.

Announced in 2015 (2015) and first released in March 2017 (2017-03), WebAssembly became a World Wide Web Consortium recommendation on 5 December 2019[11][12][13] and it received the Programming Languages Software Award from ACM SIGPLAN in 2021.[14] The World Wide Web Consortium (W3C) maintains the standard with contributions from Mozilla, Microsoft, Google, Apple, Fastly, Intel, and Red Hat.[15][16]

History

[edit]

The name WebAssembly is intended to seem synonymous with that of the assembly language. The name suggests bringing assembly-like programming to the Web, where it will be executed client-side — by the website-user's computer via the user's web browser. To accomplish this, WebAssembly must be much more hardware-independent than a true assembly language.

WebAssembly was first announced in 2015,[17] and the first demonstration was executing Unity's Angry Bots in Firefox,[18] Google Chrome,[19] and Microsoft Edge.[20] The precursor technologies were asm.js from Mozilla and Google Native Client,[21][22] and the initial implementation was based on the feature set of asm.js.[23] The asm.js file already provides near-native code execution speeds[24][25] and can be considered a viable alternative for browsers that do not support WebAssembly or have it disabled for security reasons.

In March 2017, the design of the minimum viable product (MVP) was declared to be finished and the preview phase ended.[26] In late September 2017, Safari 11 was released with support. In February 2018, the WebAssembly Working Group published three public working drafts for the Core Specification, JavaScript Interface, and Web API.[27][28][29][30]

In June 2019, Chrome 75 was released with WebAssembly threads enabled by default.[31]

Since April 2022, WebAssembly 2.0 has been in draft status,[32][33] which added many SIMD-related instructions and a new v128 datatype, with the ability for functions to return multiple values, and mass memory initialize/copy.

Implementations

[edit]

While WebAssembly was initially designed to permit near-native code execution speed in the web browser, it has been considered valuable outside of such, in more generalized contexts.[34][35] Since WebAssembly's runtime environments (RE) are low-level virtual stack machines (akin to JVM or Flash VM) that may be embedded into host applications, some implementations create standalone runtime environments like Wasmtime [Wikidata] and Wasmer [Wikidata].[9][10] WebAssembly runtime environments are embedded in application servers to host "server-side" WebAssembly applications and in other applications to support plug-in-based software extension architectures, e.g., "WebAssembly for Proxies" (proxy-wasm) which specifies a WebAssembly-based ABI for extending proxy servers.[36][37]

Web browsers

[edit]

In November 2017, Mozilla declared support "in all major browsers",[38] after WebAssembly was enabled by default in Edge 16.[39] This support also includes mobile web browsers for iOS and Android. As of March 2024, 99% of tracked web browsers support WebAssembly (version 1.0),[40] more than for its predecessor asm.js.[41] For some extensions, from the 2.0 draft standard, support may be lower, but still more than 90% of web browsers may already support, e.g. for reference types extension.[42]

Compilers

[edit]

WebAssembly implementations usually use either ahead-of-time (AOT) or just-in-time (JIT) compilation, but may also use an interpreter. While the first implementations have landed in web browsers, there are also non-browser implementations for general-purpose use, including Wasmer,[10] Wasmtime[43] or WAMR,[16] wasm3, WAVM, and many others.[44]

Because WebAssembly executables are precompiled, it is possible to use a variety of programming languages to make them.[45] This is achieved either through direct compilation to Wasm, or through an implementation of their corresponding virtual machines in Wasm. Some 40 programming languages are reported to support Wasm as a compilation target.[46]

Emscripten compiles C and C++ to Wasm[26] using the Binaryen and LLVM as backend.[47] The Emscripten SDK can compile any LLVM-supported languages (such as C, C++ or Rust, among others) source code into a binary file which runs in the same sandbox as JavaScript code.[note 1] Emscripten provides bindings for several commonly used environment interfaces like WebGL.

As of version 8, a standalone Clang can compile C and C++ to Wasm.[52] Its initial aim was to support compilation from C and C++,[53] though support for other source languages such as Rust, .NET languages[54][55][46] and AssemblyScript[56] (TypeScript-like) is also emerging.

After the MVP release, WebAssembly added support for multithreading and garbage collection (WasmGC, and web browsers including Safari have added support for it),[57] which allowed more efficient compilation for garbage-collecting programming languages like C# (supported via Blazor), F# (supported via Bolero[58] with help of Blazor) and Python.[59]

A number of other languages have some support, including Python,[60] Julia,[61][62][63] Ruby[64] and Ring.[65][66]

A number of systems can compile Java and other JVM languages to JavaScript and WebAssembly. These include CheerpJ,[67] JWebAssembly[68] and TeaVM.[69] Kotlin supports WebAssembly directly.[70][71]

Limitations

[edit]

Web browsers do not permit WebAssembly code to directly manipulate the Document Object Model. Wasm code must defer to JavaScript for this.[note 2]

In an October 2023 survey of developers, less than half of the 303 participants were satisfied with the state of WebAssembly. A large majority cited the need for improvement in four areas: WASI, debugging support, integration with JavaScript and browser APIs, and build tooling.[74]

For memory-intensive allocations in WebAssembly, there are "grave limitations that make many applications infeasible to be reliably deployed on mobile browsers [..] Currently allocating more than ~300MB of memory is not reliable on Chrome on Android without resorting to Chrome-specific workarounds, nor in Safari on iOS."[75]

All major browsers allow WebAssembly if Content-Security-Policy is not specified, or if "unsafe-eval" is used, but behave differently otherwise.[76] Chrome requires "unsafe-eval",[77][78] though a worker thread can be a workaround.[78]

Security considerations

[edit]

In June 2018, a security researcher presented the possibility of using WebAssembly to circumvent browser mitigations for Spectre and Meltdown security vulnerabilities once support for threads with shared memory is added. Due to this concern, WebAssembly developers put the feature on hold.[79][80][81] However, in order to explore these future language extensions, Google Chrome added experimental support for the WebAssembly thread proposal in October 2018.[82]

WebAssembly has been criticized for allowing greater ease of hiding the evidence for malware writers, scammers and phishing attackers; WebAssembly is present on the user's machine only in its compiled form, which "[makes malware] detection difficult".[83] Speed and the easy ability to conceal in WebAssembly have led to its use in hidden crypto mining within the website visitor's device.[83][84][79] Coinhive, a now defunct service facilitating cryptocurrency mining in website visitors' browsers, claims their "miner uses WebAssembly and runs with about 65% of the performance of a native Miner."[79] A June 2019 study from the Technische Universität Braunschweig analyzed the usage of WebAssembly in the Alexa top 1 million websites and found the prevalent use was for malicious crypto mining, and that malware accounted for more than half of the WebAssembly-using websites studied.[85][86] An April 2021 study from Universität Stuttgart found that since then crypto mining has been marginalized, falling to below 1% of all WebAssembly modules gathered from a wide range of sources, also including the Alexa top 1 million websites.[87]

As WebAssembly supports only structured control flow, it is amenable toward security verification techniques including symbolic execution.[88]

WASI

[edit]

WebAssembly System Interface (WASI) is a simple interface (ABI and API) designed by Mozilla intended to be portable to any platform.[89] It provides POSIX-like features like file I/O constrained by capability-based security.[90][91] There are additional proposed ABI/APIs.[92][93]

WASI is influenced by CloudABI and Capsicum.[according to whom?]

Solomon Hykes [fr], a co-founder of Docker, wrote in 2019, "If WASM+WASI existed in 2008, we wouldn't have needed to create Docker. That's how important it is. WebAssembly on the server is the future of computing."[94]

Specification

[edit]

Host environment

[edit]

The general standard provides core specifications for the JavaScript API and details on embedding.[5]

Virtual machine

[edit]

Wasm code (binary code, i.e. bytecode) is intended to be run on a portable virtual stack machine (VM).[95] The VM is designed to be faster to parse and execute than JavaScript and to have compact code representation.[53] Any external functionality (like syscalls) that may be expected by Wasm binary code is not stipulated by the standard. It rather provides a way to deliver interfacing via modules by the host environment that the VM runs in.[96][9]

Wasm program

[edit]

A Wasm program is designed as a separate module containing collections of various Wasm-defined values and program type definitions. These are provided in either binary or textual format (see below) that have a common structure.[97] Such a module may provide a start function that is executed upon instantiation of a wasm binary.

Instruction set

[edit]

The core standard for the binary format of a Wasm program defines an instruction set architecture (ISA) consisting of specific binary encodings of types of operations which are executed by the VM (without specifying how exactly they must be executed).[98] The list of instructions includes standard memory load/store instructions, numeric, parametric, control of flow instruction types and Wasm-specific variable instructions.[99]

The number of opcodes used in the original standard (MVP) was a bit fewer than 200 of the 256 possible opcodes. Subsequent versions of WebAssembly pushed the number of opcodes a bit over 200. The WebAssembly SIMD proposal (for parallel processing) introduces an alternate opcode prefix (0xfd) for 128-bit SIMD. The concatenation of the SIMD prefix, plus an opcode that is valid after the SIMD prefix, forms a SIMD opcode. The SIMD opcodes bring an additional 236 instructions for the "minimum viable product" (MVP) SIMD capability (for a total of around 436 instructions).[100][101] Those instructions, the "finalized opcodes"[102] are enabled by default across Google's V8 (in Google Chrome), the SpiderMonkey engine in Mozilla Firefox, and the JavaScriptCore engine in Apple's Safari[103] and there are also some additional proposal for instructions for later "post SIMD MVP", and there's also a separate "relaxed-simd" proposal on the table.[104]

These SIMD opcodes are also portable and translate to native instruction sets like x64 and ARM. In contrast, neither Java's JVM nor CIL support SIMD, at their opcode level, i.e. in the standard; both do have some parallel APIs which provide SIMD speedup. There is an extension for Java adding intrinsics for x64 SIMD,[105] that isn't portable, i.e. not usable on ARM or smartphones. Smartphones can support SIMD by calling assembly code with SIMD, and C# has similar support.

Code representation

[edit]

In March 2017, the WebAssembly Community Group reached consensus on the initial (MVP) binary format, JavaScript API, and reference interpreter.[106] It defines a WebAssembly binary format (.wasm), which is not designed to be used by humans, as well as a human-readable WebAssembly text format (.wat) that resembles a cross between S-expressions and traditional assembly languages.

The table below shows an example of a factorial function written in C and its corresponding WebAssembly code after compilation, shown both in .wat text format (a human-readable textual representation of WebAssembly) and in .wasm binary format (the raw bytecode, expressed below in hexadecimal), that is executed by a Web browser or run-time environment that supports WebAssembly.

C source code and corresponding WebAssembly
C source code WebAssembly .wat text format WebAssembly .wasm binary format 
int factorial(int n) {
  if (n == 0)
    return 1;
  else
    return n * factorial(n-1);
}

(func (param i64) (result i64)
  local.get 0
  i64.eqz
  if (result i64)
      i64.const 1
  else
      local.get 0
      local.get 0
      i64.const 1
      i64.sub
      call 0
      i64.mul
  end)

00 61 73 6D 01 00 00 00
01 06 01 60 01 7E 01 7E
03 02 01 00
0A 17 01
15 00
20 00
50
04 7E
42 01
05
20 00
20 00
42 01
7D
10 00
7E
0B
0B

All integer constants are encoded using a space-efficient, variable-length LEB128 encoding.[107]

The WebAssembly text format is more canonically written in a folded format using S-expressions. For instructions and expressions, this format is purely syntactic sugar and has no behavioral differences with the linear format.[108] Through wasm2wat, the code above decompiles to: 

(module
  (type $t0 (func (param i64) (result i64)))
  (func $f0 (type $t0) (param $p0 i64) (result i64)
    (if $I0 (result i64) ;; $I0 is an unused label name
      (i64.eqz
        (local.get $p0)) ;; the name $p0 is the same as 0 here
      (then
        (i64.const 1))
      (else
        (i64.mul
          (local.get $p0)
          (call $f0      ;; the name $f0 is the same as 0 here
            (i64.sub
              (local.get $p0)
              (i64.const 1))))))))

A module is implicitly generated by the compiler. The function is referenced by an entry of the type table in the binary, hence a type section and the type emitted by the decompiler.[109] The compiler and decompiler can be accessed online.[110]

See also

[edit]

Notes

[edit]
  1. ^ According to official documentation, the Emscripten SDK may be used to create .wasm files which then may be executed in a web browser.[48][49][50] Even though Emscripten can consume various languages when using Clang, some problems may arise.[51]
  2. ^ For Rust/Wasm development, third-party libraries can provide some of the necessary JavaScript I/O.[72][73]

References

[edit]
  1. ^ "WebAssembly/design/Semantics.md". GitHub. Retrieved 23 February 2021. WebAssembly code can be considered a structured stack machine; a machine where most computations use a stack of values, but control flow is expressed in structured constructs such as blocks, ifs, and loops. In practice, implementations need not maintain an actual value stack, nor actual data structures for control; they need only behave as if they did so.
  2. ^ Mozilla. "Understanding WebAssembly text format". MDN Web Docs. Retrieved 9 December 2019.
  3. ^ "Introduction — WebAssembly 1.0". webassembly.github.io. Retrieved 18 June 2019. WebAssembly is an open standard...
  4. ^ "Introduction — WebAssembly 1.0". webassembly.github.io. Retrieved 18 June 2019. WebAssembly is a ... code format
  5. ^ a b "Conventions — WebAssembly 1.0". webassembly.github.io. Retrieved 17 May 2019. WebAssembly is a programming language that has multiple concrete representations (its binary format and the text format). Both map to a common structure.
  6. ^ "Introduction — WebAssembly 1.0". webassembly.github.io. Retrieved 18 June 2019. ... this specification is complemented by additional documents defining interfaces to specific embedding environments such as the Web. These will each define a WebAssembly application programming interface (API) suitable for a given environment.
  7. ^ "Introduction — WebAssembly 1.1". webassembly.github.io. Retrieved 19 February 2021. Its main goal is to enable high performance applications on the Web, but it does not make any Web-specific assumptions or provide Web-specific features, so it can be employed in other environments as well.
  8. ^ Haas, Andreas; Rossberg, Andreas; Schuff, Derek L.; Titzer, Ben L.; Holman, Michael; Gohman, Dan; Wagner, Luke; Zakai, Alon; Bastien, JF (14 June 2017). "Bringing the Web Up to Speed with WebAssembly". SIGPLAN Notices. 52 (6): 185–200. doi:10.1145/3140587.3062363. ISSN 0362-1340. While the Web is the primary motivation for WebAssembly, nothing in its design depends on the Web or a JavaScript environment. It is an open standard specifically designed for embedding in multiple contexts, and we expect that stand-alone implementations will become available in the future.
  9. ^ a b c "Outside the web: standalone WebAssembly binaries using Emscripten · V8". v8.dev. Retrieved 28 July 2020.
  10. ^ a b c "Wasmer - The Universal WebAssembly Runtime". wasmer.io. Retrieved 19 February 2021. Compile everything to WebAssembly. Run it on any OS or embed it into other languages.
  11. ^ World Wide Web Consortium. "WebAssembly Core Specification". World Wide Web Consortium (W3). Retrieved 9 December 2019.
  12. ^ Couriol, Bruno. "WebAssembly 1.0 Becomes a W3C Recommendation and the Fourth Language to Run Natively in Browsers". infoq.com. Retrieved 9 December 2019.
  13. ^ "WebAssembly Specification — WebAssembly 1.1". webassembly.github.io. Retrieved 22 March 2021.
  14. ^ "Programming Languages Software Award". www.sigplan.org.
  15. ^ Bright, Peter (18 June 2015). "The Web is getting its bytecode: WebAssembly". Ars Technica. Condé Nast.
  16. ^ a b "New Bytecode Alliance Brings the Security, Ubiquity, and Interoperability of the Web to the World of Pervasive Computing". Mozilla. 12 November 2019. Retrieved 27 May 2019.
  17. ^ "Launch bug". GitHub / WebAssembly / design. 11 June 2015.
  18. ^ Wagner, Luke (14 March 2016). "A WebAssembly Milestone: Experimental Support in Multiple Browsers". Mozilla Hacks.
  19. ^ Thompson, Seth (15 March 2016). "Experimental support for WebAssembly in V8". V8 Blog.
  20. ^ Zhu, Limin (15 March 2016). "Previewing WebAssembly experiments in Microsoft Edge". Microsoft Edge dev blog.
  21. ^ Lardinois, Frederic (17 June 2015). "Google, Microsoft, Mozilla And Others Team Up To Launch WebAssembly, A New Binary Format For The Web". TechCrunch. Retrieved 24 December 2017.
  22. ^ Avram, Abel (31 May 2017). "Google Is to Remove Support for PNaCl". InfoQ. Retrieved 22 December 2017.
  23. ^ "WebAssembly: a binary format for the web". ②ality – JavaScript and more. 18 June 2015.
  24. ^ "Staring at the Sun: Dalvik vs. ASM.js vs. Native". blog.mozilla.org. August 2013. Retrieved 7 December 2019. Even discarding the one score where asm.js did better, it executes at around 70% of the speed of native C++ code.
  25. ^ Arjun, Jangda, Abhinav Powers, Bobby Berger, Emery Guha (25 January 2019). Not So Fast: Analyzing the Performance of WebAssembly vs. Native Code. OCLC 1106328738.{{cite book}}: CS1 maint: multiple names: authors list (link)
  26. ^ a b Krill, Paul (6 March 2017). "WebAssembly is now ready for browsers to use". InfoWorld. Retrieved 23 December 2017.
  27. ^ "WebAssembly First Public Working Drafts". W3C. 15 February 2018. Retrieved 20 April 2018.
  28. ^ "WebAssembly Core Specification". W3C. 15 February 2018. Retrieved 20 April 2018.
  29. ^ "WebAssembly JavaScript Interface". W3C. 15 February 2018. Retrieved 20 April 2018.
  30. ^ "WebAssembly Web API". W3C. 15 February 2018. Retrieved 20 April 2018.
  31. ^ "WebAssembly Worker Based Threads - Chrome Platform Status". chromestatus.com. Retrieved 19 February 2022.
  32. ^ "WebAssembly Specification — WebAssembly 2.0 (Draft 2022-09-01)". webassembly.github.io. Retrieved 9 September 2022.
  33. ^ "WebAssembly 2.0 First Public Working Drafts | W3C News". 19 April 2022. Retrieved 9 September 2022.
  34. ^ "Non-Web Embeddings". WebAssembly. Retrieved 15 May 2019.
  35. ^ "Non-Web Embeddings". GitHub / WebAssembly. Retrieved 15 May 2019.
  36. ^ Freese, Danny (October 3, 2023). "Proxy-Wasm: It's WebAssembly for Proxies". Blog. Kong. Retrieved 2024-05-06.
  37. ^ "proxy-wasm/spec: WebAssembly for Proxies (ABI specification)". GitHub. Retrieved 6 May 2024.
  38. ^ "WebAssembly support now shipping in all major browsers". The Mozilla Blog. Retrieved 21 November 2017.
  39. ^ "Introducing new JavaScript optimizations, WebAssembly, SharedArrayBuffer, and Atomics in EdgeHTML 16". Microsoft Edge Dev Blog. 31 October 2017. Retrieved 21 November 2017.
  40. ^ "WebAssembly | Can I use... Support tables for HTML5, CSS3, etc". canIuse.com. Retrieved 1 March 2024.
  41. ^ "asm.js | Can I use... Support tables for HTML5, CSS3, etc". caniuse.com. Retrieved 29 September 2024.
  42. ^ "WebAssembly Reference Types | Can I use... Support tables for HTML5, CSS3, etc". caniuse.com. Retrieved 3 March 2024.
  43. ^ "Wasmtime — a small and efficient runtime for WebAssembly & WASI". wasmtime.dev. Retrieved 18 December 2020.
  44. ^ "Roadmap". Retrieved 7 December 2021.
  45. ^ Ball, Kevin (26 June 2018). "How WebAssembly is Accelerating the Future of Web Development". Archived from the original on 12 February 2019. Retrieved 22 October 2018.
  46. ^ a b "Awesome WebAssembly Languages". GitHub. 26 June 2018. Retrieved 15 February 2022.
  47. ^ Zakai, Alon [@kripken] (21 October 2019). "Emscripten has switched to the upstream LLVM wasm backend by default! / Details:https://groups.google.com/forum/#!topic/emscripten-discuss/NpxVAOirSl4" (Tweet). Retrieved 22 October 2019 – via Twitter.
  48. ^ "Developer's Guide - WebAssembly". webassembly.org. Retrieved 10 June 2019.
  49. ^ "Compiling a New C/C++ Module to WebAssembly". MDN Web Docs. Retrieved 10 June 2019.
  50. ^ "Building to WebAssembly — Emscripten 1.38.33 documentation". emscripten.org. Retrieved 10 June 2019.
  51. ^ "Emscripting a C library to Wasm | Web". Google Developers. Retrieved 10 June 2019.
  52. ^ "LLVM 8.0.0 Release Notes — LLVM 8 documentation". releases.llvm.org. Retrieved 22 October 2019.
  53. ^ a b "WebAssembly High-Level Goals". GitHub / WebAssembly / design. 11 December 2015.
  54. ^ Krill, Paul (29 November 2017). "Direct WebAssembly compilation comes to Rust language". InfoWorld. Retrieved 24 December 2017.
  55. ^ "Frequently asked questions (FAQ) about Blazor". blazor.net. Retrieved 18 June 2018.
  56. ^ AssemblyScript/assemblyscript, The AssemblyScript Project, 9 September 2020, retrieved 9 September 2020
  57. ^ "WebAssembly Garbage Collection (WasmGC) now enabled by default in Chrome | Blog". Chrome for Developers. Retrieved 11 December 2023.
  58. ^ "Bolero: F# in WebAssembly". fsbolero.io. Retrieved 25 July 2019.
  59. ^ "A new way to bring garbage collected programming languages efficiently to WebAssembly · V8". v8.dev. Retrieved 11 December 2023.
  60. ^ "Pyodide: Bringing the scientific Python stack to the browser – Mozilla Hacks - the Web developer blog". Mozilla Hacks – the Web developer blog. Retrieved 9 September 2020.
  61. ^ "Julia in the Browser". nextjournal.com. Retrieved 9 April 2019.
  62. ^ "WebAssembly platform by tshort · Pull Request #2 · JuliaPackaging/Yggdrasil". GitHub. Retrieved 9 April 2019.
  63. ^ Fischer, Keno (22 July 2019), GitHub - Keno/julia-wasm: Running julia on wasm., retrieved 25 July 2019
  64. ^ "MRuby in Your Browser". ruby.dj. Retrieved 25 July 2019.
  65. ^ Paul Krill (24 August 2020). "Ring language upgrade focuses on WebAssembly". InfoWorld.
  66. ^ "Ring in web browser". Retrieved 17 August 2024.
  67. ^ "Java to WebAssembly Compiler - CheerpJ". Retrieved 27 April 2023.
  68. ^ JWebAssembly, 27 April 2023 – via GitHub
  69. ^ "TeaVM — Overview". www.teavm.org. Retrieved 27 April 2023.
  70. ^ "Bringing Kotlin to the Web". Retrieved 11 December 2023.
  71. ^ Deleuze, Sébastien (13 February 2023). "The huge potential of Kotlin/Wasm". seb.deleuze.fr. Retrieved 11 December 2023.
  72. ^ "stdweb - Rust". docs.rs. Retrieved 5 June 2019. The goal of this crate is to provide Rust bindings to the Web APIs and to allow a high degree of interoperability between Rust and JavaScript.
  73. ^ "web_sys - Rust". docs.rs. Retrieved 5 June 2019. Raw API bindings for Web APIs. This is a procedurally generated crate from browser WebIDL which provides a binding to all APIs that browser provide on the web.
  74. ^ "The State of WebAssembly 2023". Scott Logic. 18 October 2023. Retrieved 14 March 2024.
  75. ^ "Wasm needs a better memory management story · Issue #1397 · WebAssembly/design". GitHub. Retrieved 15 February 2021.
  76. ^ "WebAssembly/content-security-policy". GitHub. Retrieved 17 February 2021.
  77. ^ "948834 - chromium - An open-source project to help move the web forward. - Monorail". bugs.chromium.org. Retrieved 17 February 2021.
  78. ^ a b "No way to use WebAssembly on Chrome without 'unsafe-eval' · Issue #7 · WebAssembly/content-security-policy". GitHub. Retrieved 17 February 2021.
  79. ^ a b c Neumann, Robert; Toro, Abel (19 April 2018). "In-browser mining: Coinhive and WebAssembly". Forcepoint. Retrieved 8 June 2019.
  80. ^ Cimpanu, Catalin (24 June 2018). "Changes in WebAssembly Could Render Meltdown and Spectre Browser Patches Useless". Bleeping Computer. Retrieved 8 June 2019.
  81. ^ Sanders, James (25 June 2018). "How opaque WebAssembly code could increase the risk of Spectre attacks online". Tech Republic. Retrieved 9 June 2019.
  82. ^ R, Bhagyashree (30 October 2018). "Google Chrome 70 now supports WebAssembly threads to build multi-threaded web applications". Packt Pub. Retrieved 9 June 2019.
  83. ^ a b Lonkar, Aishwarya; Chandrayan, Siddhesh (October 2018). "The dark side of WebAssembly". Virus Bulletin. Retrieved 8 June 2019.
  84. ^ Segura, Jérôme (29 November 2017). "Persistent drive-by cryptomining coming to a browser near you". Malwarebytes. Retrieved 8 June 2019.
  85. ^ "Recent Study Estimates That 50% of Websites Using WebAssembly Apply It for Malicious Purposes". InfoQ. Retrieved 3 November 2019.
  86. ^ Musch, Marius; Wressnegger, Christian; Johns, Martin; Rieck, Konrad (June 2019). "New Kid on the Web: A Study on the Prevalence of WebAssembly in the Wild". Detection of Intrusions and Malware, and Vulnerability Assessment (PDF). Lecture Notes in Computer Science. Vol. 11543. Detection of Intrusions and Malware, and Vulnerability Assessment. pp. 23–42. doi:10.1007/978-3-030-22038-9_2. ISBN 978-3-030-22037-2. S2CID 184482682. Archived from the original (PDF) on 26 July 2022. Retrieved 15 February 2022. Slides (PDF) Archived 3 November 2019 at the Wayback Machine
  87. ^ Aaron Hilbig, Daniel Lehmann, and Michael Pradel (April 2021). "An Empirical Study of Real-World WebAssembly Binaries: Security, Languages, Use Cases." (Archived April 2021) https://software-lab.org/publications/www2021.pdf
  88. ^ Watt, Conrad (8 January 2018). "Mechanising and verifying the WebAssembly specification". Proceedings of the 7th ACM SIGPLAN International Conference on Certified Programs and Proofs. CPP 2018. Los Angeles CA USA: ACM. pp. 53–65. doi:10.1145/3167082. ISBN 978-1-4503-5586-5. S2CID 9401691.
  89. ^ "WebAssembly System Interface Repo". GitHub / WebAssembly. 10 February 2020.
  90. ^ "Additional background on Capabilities". GitHub. bytecodealliance. 4 March 2022.
  91. ^ "Standardizing WASI: A system interface to run WebAssembly outside the web – Mozilla Hacks - the Web developer blog". Mozilla Hacks – the Web developer blog.
  92. ^ "reference-sysroot Repo". GitHub / WebAssembly. 12 January 2020.
  93. ^ "wasm-c-api Repo". GitHub / WebAssembly. 3 February 2020.
  94. ^ Hykes, Solomon (27 March 2019). "Solomon Hykes on X". Twitter. Retrieved 29 September 2024.
  95. ^ "Design Rationale". GitHub / WebAssembly / design. 1 October 2016.
  96. ^ "Portability - WebAssembly". webassembly.org. Retrieved 28 July 2020.
  97. ^ "Conventions — WebAssembly 1.0". webassembly.github.io. Retrieved 12 November 2019.
  98. ^ "Introduction — WebAssembly 1.0". webassembly.github.io. Retrieved 17 May 2019.
  99. ^ "Instructions — WebAssembly 1.0". webassembly.github.io. Retrieved 12 November 2019.
  100. ^ Lively, Thomas (19 February 2021) [Pull Request opened on 2021-02-05]. "Final opcodes by tlively · Pull Request #452 · WebAssembly/simd · GitHub". Bytecode Alliance. Retrieved 12 May 2021 – via GitHub.
  101. ^ Delendik, Yury (19 February 2021) [SIMD changes committed on 2021-02-19]. "File wasm-tools/expr.rs at b5c3d98e40590512a3b12470ef358d5c7b983b15 · bytecodealliance/wasm-tools · GitHub". Bytecode Alliance. Retrieved 12 May 2021 – via GitHub.
  102. ^ "Update interpreter and text with finalized opcodes by ngzhian · Pull Request #486 · WebAssembly/simd". GitHub. Retrieved 14 May 2021.
  103. ^ "WebAssembly/simd". GitHub. Retrieved 14 May 2021.
  104. ^ WebAssembly/relaxed-simd, WebAssembly, 3 May 2021, retrieved 14 May 2021
  105. ^ "How we made the JVM 40x faster". astojanov.github.io. Retrieved 17 February 2021.
  106. ^ "Roadmap". WebAssembly. March 2017.
  107. ^ WebAssembly Community Group (January 2020). "WebAssembly Specification Release 1.0". Retrieved 13 January 2020.
  108. ^ "Folded instructions". GitHub. / WebAssembly / spec
  109. ^ "Modules (Binary)". WebAssembly 1.0.
  110. ^ "WebAssembly Binary Toolkit (wabt) demos". webassembly.github.io.

 This article incorporates text from a free content work. Licensed under Apache License 2.0 (license statement/permission). Text taken from Text Format​, jfbastien; rossberg-chromium; kripken; titzer; s3ththompson; sunfishcode; lukewagner; flagxor; enricobacis; c3d; binji; andrewosh, GitHub. WebAssembly/design.

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