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dawn/dawn/fbfb4497e03a363aba0eb093995b0140b2ec82d8
commit
fbfb4497e03a363aba0eb093995b0140b2ec82d8
[log]
author
Le Hoang Quyen <lehoangquyen@chromium.org>
Mon Dec 22 08:14:00 2025 -0800
committer
Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>
Mon Dec 22 08:14:00 2025 -0800
tree
1a6778b869cb4f91c69cf74551f6d7f9b63863f7
parent
2da5608ee34f07b2ee8ce3bdbe2da8091752f9bd [diff]
native: Handle BlobCache mLoadFunction size mismatch as cache miss

BlobCache currently calls mLoadFunction twice for a load request,
expecting identical sizes. This isn't guaranteed due to potential
external cache evictions or IO/timeout issues between calls. Instead of
crashing, this CL treats a size mismatch as a cache miss.

Future work should update mLoadFunction to return a memory buffer
directly, eliminating the two-call requirement.

Bug: chromium:469351711
Change-Id: If25c0e6a94ab0e00595a8deb5062f46ddfbea975
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/281875
Commit-Queue: Quyen Le <lehoangquyen@chromium.org>
Auto-Submit: Quyen Le <lehoangquyen@chromium.org>
Reviewed-by: Loko Kung <lokokung@google.com>
2 files changed
tree: 1a6778b869cb4f91c69cf74551f6d7f9b63863f7
  1. .github/
  2. .vscode/
  3. build_overrides/
  4. docs/
  5. generator/
  6. include/
  7. infra/
  8. scripts/
  9. src/
  10. test/
  11. third_party/
  12. tools/
  13. webgpu-cts/
  14. build
  15. buildtools
  16. testing
  17. .bazelrc
  18. .clang-format
  19. .clang-format-ignore
  20. .clang-tidy
  21. .git-blame-ignore-revs
  22. .gitattributes
  23. .gitignore
  24. .gitmodules
  25. .gn
  26. .style.yapf
  27. .vpython3
  28. AUTHORS
  29. BUILD.bazel
  30. BUILD.gn
  31. CMakeLists.txt
  32. CMakeSettings.json
  33. CODE_OF_CONDUCT.md
  34. codereview.settings
  35. CONTRIBUTING.md
  36. CPPLINT.cfg
  37. DEPS
  38. DIR_METADATA
  39. go.mod
  40. go.sum
  41. go_presubmit_support.py
  42. LICENSE
  43. OWNERS
  44. PRESUBMIT.py
  45. README.chromium
  46. README.md
  47. test_spec_presubmit_support.py
  48. unsafe_buffers_paths.txt
  49. WATCHLISTS
  50. WORKSPACE.bazel
README.md

Build Status Matrix Space

Dawn, a WebGPU implementation

Dawn is an open-source and cross-platform implementation of the WebGPU standard. More precisely it implements webgpu.h that is a one-to-one mapping with the WebGPU IDL. Dawn is meant to be integrated as part of a larger system and is the underlying implementation of WebGPU in Chromium.

Dawn provides several WebGPU building blocks:

  • WebGPU C/C++ headers that applications and other building blocks use.
    • The webgpu.h version that Dawn implements.
    • A C++ wrapper for the webgpu.h.
  • A “native” implementation of WebGPU using platforms' GPU APIs: D3D12, Metal, Vulkan and OpenGL. See per API support for more details.
  • A client-server implementation of WebGPU for applications that are in a sandbox without access to native drivers
  • Tint is a compiler for the WebGPU Shader Language (WGSL) that can be used in standalone to convert shaders from and to WGSL.

Helpful links:

Documentation table of content

Developer documentation:

User documentation: (TODO, figure out what overlaps with the webgpu.h docs)

License

BSD 3-Clause License, please see LICENSE.

Disclaimer

This is not an officially supported Google product.