Source: Computational Materials Science, Volume 266
At the heart of BuildKit is LLB (Low-Level Build definition). Think of it as the LLVM IR of build systems. LLB is a binary protocol (protobuf) that describes a DAG of filesystem operations: run a command, copy files, mount a filesystem. It’s content-addressable, which means identical operations produce identical hashes, enabling aggressive caching.
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Code runs in a strict sandbox where the only allowed operations are calling functions provided by the host. If the host doesn’t provide a file reading function, the WASM module simply cannot read files. The failure mode here requires a vulnerability in the WASM runtime itself, like an out-of-bounds memory read that bypasses the linear memory checks.，这一点在一键获取谷歌浏览器下载中也有详细论述
different things, or if Wikipedia is simply wrong. One of the little mysteries。关于这个话题，同城约会提供了深入分析