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feat(wasm): patch non-streaming load paths - #23767

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feat(wasm): patch non-streaming load paths#23767
d2anamaria wants to merge 5 commits into
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ana/feat/wasm-non-streaming

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@d2anamaria

@d2anamaria d2anamaria commented Aug 31, 2026

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Register wasm modules when apps load via fetch → arrayBuffer → WebAssembly.instantiate/compile, not only streaming APIs.

  • Patch Response.prototype.arrayBuffer and bytes so wasm buffers remember their fetch URL
  • Wrap WebAssembly.instantiate and compile to register modules after byte-based loads
  • Workers get non-streaming registration too, through the shared patchWebAssembly(register)
  • Add tests for tagged-buffer registration, untagged-buffer negative case, argument forwarding, and a browser test for fetch → arrayBuffer → instantiate

Registration only. Frames from buffer-compiled modules still carry wasm://wasm/<hash>, which nothing matches against the registered image, so debug_meta does not attach yet. That half is #23781.

Implementation

  • patchWasmResponse.ts tags wasm buffers in a WeakMap when read from a wasm-like Response; getWasmSourceUrl() resolves them at instantiate/compile time
  • Response patching goes through fill(), so a frozen Response.prototype cannot break Sentry.init()
  • patchWebAssembly() orchestrates response patching, non-streaming hooks, then streaming hooks (unchanged behavior)
  • Non-streaming hooks forward every argument and never let a registration failure reject the caller's promise
  • Skip registration when instantiate receives an already-compiled WebAssembly.Module

@d2anamaria
d2anamaria marked this pull request as draft August 31, 2026 12:44
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size-limit report 📦

Path Size % Change Change
@sentry/browser 28.56 kB - -
@sentry/browser - with treeshaking flags 26.92 kB - -
@sentry/browser - with treeshaking flags tracing without tracing 26.82 kB - -
@sentry/browser (incl. Tracing) 48.86 kB - -
@sentry/browser (incl. Tracing + Span Streaming) 48.87 kB - -
@sentry/browser (incl. Tracing, Profiling) 51.79 kB - -
@sentry/browser (incl. Tracing, Replay) 88.35 kB - -
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 77.75 kB - -
@sentry/browser (incl. Tracing, Replay with Canvas) 93.04 kB - -
@sentry/browser (incl. Tracing, Replay, Feedback) 106 kB - -
@sentry/browser (incl. Feedback) 46.05 kB - -
@sentry/browser (incl. sendFeedback) 33.62 kB - -
@sentry/browser (incl. FeedbackAsync) 38.73 kB - -
@sentry/browser (incl. Metrics) 29.51 kB - -
@sentry/browser (incl. Logs) 29.8 kB - -
@sentry/browser (incl. Metrics & Logs) 30.43 kB - -
@sentry/react 30.3 kB - -
@sentry/react (incl. Tracing) 51.06 kB - -
@sentry/vue 35.73 kB - -
@sentry/vue (incl. Tracing) 51.13 kB - -
@sentry/svelte 28.59 kB - -
CDN Bundle 30.35 kB - -
CDN Bundle (incl. Tracing) 49.5 kB - -
CDN Bundle (incl. Logs, Metrics) 32.58 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) 51.41 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) 73.17 kB - -
CDN Bundle (incl. Tracing, Replay) 87 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 88.86 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) 92.93 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 94.83 kB - -
CDN Bundle - uncompressed 89.95 kB - -
CDN Bundle (incl. Tracing) - uncompressed 147.56 kB - -
CDN Bundle (incl. Logs, Metrics) - uncompressed 96.24 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 153.25 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 225.41 kB - -
CDN Bundle (incl. Tracing, Replay) - uncompressed 267.05 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 272.73 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 280.75 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 286.42 kB - -
@sentry/nextjs (client) 53.68 kB - -
@sentry/sveltekit (client) 49.29 kB - -
@sentry/core/server 65.82 kB - -
@sentry/core/browser 51.94 kB - -
@sentry/node 123.85 kB +0.02% +19 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection) 85.53 kB - -
@sentry/node - without tracing 88.15 kB +0.03% +23 B 🔺
@sentry/node - without channel injection 103.27 kB +0.02% +18 B 🔺
@sentry/aws-serverless 96.5 kB +0.03% +23 B 🔺
@sentry/cloudflare (withSentry) - minified 201.21 kB - -
@sentry/cloudflare (withSentry) 500.7 kB - -

View base workflow run

Comment thread packages/wasm/test/patchWebAssembly.test.ts
@andreiborza
andreiborza requested review from msonnb and removed request for msonnb August 31, 2026 13:45
@d2anamaria
d2anamaria marked this pull request as ready for review August 31, 2026 17:13
@d2anamaria
d2anamaria requested a review from andreiborza August 31, 2026 17:14
d2anamaria and others added 2 commits August 31, 2026 23:37
- Patch `Response.prototype.arrayBuffer` and `bytes` to tag wasm buffers with `response.url` in a `WeakMap`
- Hook `WebAssembly.instantiate` and `compile` to use tagged URL to register module
- Skip registration when `instantiate` receives an already-compiled `WebAssembly.Module`
- Split `patchWebAssembly` into response, non-streaming, and streaming setup; guard non-streaming with `nonStreamingPatched`

- Add `patchWebAssembly.test.ts` for fetch → arrayBuffer → instantiate/compile
- Extend `webworker.test.ts` to restore patched globals and assert `instantiate` is hooked
@andreiborza
andreiborza force-pushed the ana/feat/wasm-non-streaming branch from 3a55a63 to 99a2a60 Compare August 31, 2026 22:15
Comment thread packages/wasm/src/patchWebAssembly.ts

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

Fix All in Cursor

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Comment thread packages/wasm/src/patchWasmResponse.ts Outdated
@andreiborza
andreiborza requested a review from a team as a code owner September 1, 2026 09:25
@andreiborza
andreiborza requested review from logaretm and msonnb and removed request for a team September 1, 2026 09:25
Comment thread packages/wasm/src/patchWasmResponse.ts
@andreiborza andreiborza changed the title feat(wasm): patch non-streaming load paths & dedupe web worker patching feat(wasm): patch non-streaming load paths Sep 1, 2026
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2 participants