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dawn/dawn/c2ef80cc33d000da0fbaef25f0bcc0c6aa5d98e2
commit
c2ef80cc33d000da0fbaef25f0bcc0c6aa5d98e2
[log]
author
Ryan Harrison <rharrison@chromium.org>
Wed Sep 16 10:04:22 2026 -0700
committer
dawn-scoped@luci-project-accounts.iam.gserviceaccount.com <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>
Wed Sep 16 10:04:22 2026 -0700
tree
6e79991ae3087d86effdaa7f5c751471e5828bc8
parent
aa02747dfae033881f4334ad7e2b04a5e06bc492 [diff]
[fuzz] Fix concurrency issue when fuzzer fails in -check

The existing concurrent code in -check does not correctly handle when
a gorountine returns failure. Specifically it doesn't wait for the
other goroutines to finish their current task and stop before tearing
down the progress bar, thus there is a race that sometimes leads to
instead of outputting the error text of the failing run will cause a Go
panic due to trying to send on a channel that is closed.

In this CL I am removing the non-idiomatic concurrency code and
replacing it with usage of the standard libraries and extensions for
handling this case.

Since this was the only usage of RunConcurrent, and it is error prone,
I am also removing it.

Fixes: 561685245
Change-Id: Ib2ec8a2ce09180d42b1cccabf866ed803d37b56b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/342195
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
3 files changed
tree: 6e79991ae3087d86effdaa7f5c751471e5828bc8
  1. .github/
  2. .vscode/
  3. agents/
  4. build_overrides/
  5. docs/
  6. generator/
  7. include/
  8. infra/
  9. scripts/
  10. src/
  11. test/
  12. third_party/
  13. tools/
  14. webgpu-cts/
  15. build
  16. buildtools
  17. testing
  18. .bazelignore
  19. .bazelrc
  20. .bazelversion
  21. .clang-format
  22. .clang-format-ignore
  23. .clang-tidy
  24. .git-blame-ignore-revs
  25. .gitattributes
  26. .gitignore
  27. .gitmodules
  28. .gn
  29. .style.yapf
  30. .vpython3
  31. AUTHORS
  32. BUILD.bazel
  33. BUILD.gn
  34. CMakeLists.txt
  35. CMakeSettings.json
  36. CODE_OF_CONDUCT.md
  37. codereview.settings
  38. CONTRIBUTING.md
  39. CPPLINT.cfg
  40. DEPS
  41. DIR_METADATA
  42. go.mod
  43. go.sum
  44. go_presubmit_support.py
  45. LICENSE
  46. MODULE.bazel
  47. MODULE.bazel.lock
  48. OWNERS
  49. PRESUBMIT.py
  50. PRESUBMIT_test.py
  51. README.chromium
  52. README.md
  53. unsafe_buffers_paths.txt
  54. vpython.toml
  55. vpython.toml.uv.lock
  56. WATCHLISTS
  57. 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.