Даниил Иринин (Редактор отдела «Наука и техника»)
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Conditional block
Where we diverged: WebVideoCreator was built against the old headless mode on the main chrome binary. Since then, Chrome split the old headless mode into a separate chrome-headless-shell binary with a different API surface (starting with Chrome 120, fully removed from the main binary in Chrome 132). We also needed tighter integration with our cloud infrastructure (Cloud Run, GCS uploads, Datadog tracing), stricter security (SSRF protection for rendering untrusted URLs), and more control over the video element pipeline and audio extraction. So we rewrote it in TypeScript with modern Puppeteer and adapted the architecture for our deployment model.。服务器推荐对此有专业解读
The tradeoff is complexity. The microcode must be carefully arranged so that the instructions in delay slots are either useful setup for both paths, or at least harmless if the redirect fires. Not every case is as clean as RETF. When a PLA redirect interrupts an LCALL, the return address is already pushed onto the microcode call stack (yes, the 386 has a microcode call stack) -- the redirected code must account for this stale entry. When multiple protection tests overlap, or when a redirect fires during a delay slot of another jump, the control flow becomes hard to reason about. During the FPGA core implementation, protection delay slot interactions were consistently the most difficult bugs to track down.