Crafting the Impossible: X86 Virtualization in the Browser with WebAssembly

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JSNation 2022

Alessandro Pignotti

WebAssembly is a browser feature designed to bring predictable high performance to web applications, but its capabilities are often misunderstood. This talk will explore how WebAssembly is different from JavaScript, from the point of view of both the developer and the browser engine, with a particular focus on the V8/Chrome implementation. <a href="https://webvm.io/">WebVM</a> is our solution to efficiently run unmodified x86 binaries in the browser and showcases what can be done with WebAssembly today. A high level overview of the project components, including the JIT engine, the Linux emulation layer and the storage backend will be discussed, followed by live demos.