|author||Ben Clayton <firstname.lastname@example.org>||Mon Aug 02 11:13:49 2021 +0000|
|committer||Tint LUCI CQ <email@example.com>||Mon Aug 02 11:13:49 2021 +0000|
Revert "Update SPIR-V Tools fuzzer" This reverts commit 5a536347649b3b76a4ddb41ae08967a30118d10a. Reason for revert: This is making the Dawn -> Chromium roller fail. https://github.com/KhronosGroup/SPIRV-Tools/pull/4407 introduces a new mandatory parameter to the spvtools::fuzz::Fuzzer constructor, which does not exist in Chromium's version of SPIRV-Tools (d9f89257855a2784323512cd9568b6610bcae581). The roll of SPIRV-Tools into Chromium is currently blocked by another issue, and is a couple of weeks behind ToT. See https://autoroll.skia.org/r/vulkan-deps-chromium-autoroll. Note, that https://github.com/KhronosGroup/SPIRV-Tools/pull/4407 is going to block the eventual roll of SPIRV-Tools in Chromium, as there's no way this code can compile for both pre and post roll. I'll try and fix this after unblocking this roll Original change's description: > Update SPIR-V Tools fuzzer > > Updates spirv-tools DEPS to pull in some recent spirv-fuzz changes, and > modifies the SPIR-V Tools fuzzer so that inapplicable transformations > are ignored. > > Change-Id: Ibdea6e9bc35224efe148133eced341168f7ce7b7 > Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/60209 > Auto-Submit: Alastair Donaldson <firstname.lastname@example.org> > Kokoro: Kokoro <email@example.com> > Reviewed-by: Ryan Harrison <firstname.lastname@example.org> > Commit-Queue: Ryan Harrison <email@example.com> # Not skipping CQ checks because original CL landed > 1 day ago. Change-Id: I4ebcfcfab16e760f64cb8dc622dfb6ef4f1eccf0 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/60560 Reviewed-by: Ben Clayton <firstname.lastname@example.org> Kokoro: Ben Clayton <email@example.com> Commit-Queue: Ben Clayton <firstname.lastname@example.org>
Tint is a compiler for the WebGPU Shader Language (WGSL).
This is not an officially supported Google product.
TINT_BUILD_SPV_READER: enable the SPIR-V input reader (off by default)
TINT_BUILD_WGSL_READER: enable the WGSL input reader (on by default)
TINT_BUILD_SPV_WRITER: enable the SPIR-V output writer (on by default)
TINT_BUILD_WGSL_WRITER: enable the WGSL output writer (on by default)
TINT_BUILD_FUZZERS: enable building fuzzzers (off by default)
Tint uses Chromium dependency management so you need to install depot_tools and add it to your PATH.
# Clone the repo as "tint" git clone https://dawn.googlesource.com/tint tint cd tint # Bootstrap the gclient configuration cp standalone.gclient .gclient # Fetch external dependencies and toolchains with gclient gclient sync
mkdir -p out/Debug cd out/Debug cmake -GNinja ../.. ninja # or autoninja
mkdir -p out/Debug cd out/Debug cmake ../.. make # -j N for N-way parallel build
mkdir -p out/Debug gn gen out/Debug autoninja -C out/Debug
If you are attempting fuzz, using
TINT_BUILD_FUZZERS=ON, the version of llvm in the XCode SDK does not have the needed libfuzzer functionality included.
The build error that you will see from using the XCode SDK will look something like this:
ld: file not found:/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/11.0.0/lib/darwin/libclang_rt.fuzzer_osx.a
The solution to this problem is to use a full version llvm, like what you would get via homebrew,
brew install llvm, and use something like
CC=<path to full clang> cmake .. to setup a build using that toolchain.
The gn based work flow uses the Chromium toolchain for building in anticipation of integration of Tint into Chromium based projects. This toolchain has additional plugins for checking for style issues, which are marked with [chromium-style] in log messages. This means that this toolchain is more strict then the default clang toolchain.
In the future we will have a CQ that will build this work flow and flag issues automatically. Until that is in place, to avoid causing breakages you can run the [chromium-style] checks using the CMake based work flows. This requires setting
CC to the version of clang checked out by
gclient sync and setting the
mkdir -p out/style cd out/style cmake ../.. CC=../../third_party/llvm-build/Release+Asserts/bin/clang cmake -DTINT_CHECK_CHROMIUM_STYLE=ON ../../ # add -GNinja for ninja builds
Please file any issues or feature requests at https://bugs.chromium.org/p/tint/issues/entry
Please see the CONTRIBUTING and CODE_OF_CONDUCT files on how to contribute to Tint.
Tint has a process for supporting experimental extensions.