fix: invalidate sandboxed preload code cache when source changes without changing length#51933
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…out changing length V8's CachedData source check hashes only the source length, so a preload edit that preserves byte length consumed the stale blob and ran the old bytecode. Bind cache entries to sha256 of the source: the renderer ships the hash of what it compiled, the browser stores it in the cache entry and only serves a blob whose hash matches the contents it just read. Reject cache writes for preload ids not served to the sending frame. Co-authored-by: Keeley Hammond <vertedinde@electronjs.org>
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MarshallOfSound
approved these changes
Jun 9, 2026
VerteDinde
approved these changes
Jun 9, 2026
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Backport of #51930
See that PR for details.
Notes: Fixed sandboxed preload scripts running a stale cached version after the script was modified without its file size changing.