CMake-only fork of https://dawn.googlesource.com/dawn with cleaned, vendored dependencies
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Alastair Donaldson 28674d7c50 AST fuzzer: reduce depth for unary wrapping
Reduces the extent to which programs with unparsable expressions are
generated by limiting the recursion depth allowed for wrapping unary
operators. Also updates some nested namespaces to use more modern C++.

Change-Id: I4637c20c9c72c6b315c04c9322d069f0e35859b3
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/85580
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Alastair Donaldson <afdx@google.com>
Auto-Submit: Alastair Donaldson <afdx@google.com>
2022-04-06 15:59:44 +00:00
.vscode .vscode: Fix quotations in windows 'configure' task 2021-07-21 13:24:21 +00:00
build_overrides Normalize DEPS to ease merging with Dawn 2022-03-28 18:01:02 +00:00
docs/tint wgsl: Make colon optional for case statements 2022-04-05 21:01:09 +00:00
include/tint tint->dawn: Shuffle source tree in preperation of merging repos 2022-02-21 15:19:07 +00:00
infra/config Generate shorter bucket names in luci-scheduler.cfg. 2022-02-10 18:42:18 +00:00
kokoro tint->dawn: Shuffle source tree in preperation of merging repos 2022-02-21 15:19:07 +00:00
src/tint AST fuzzer: reduce depth for unary wrapping 2022-04-06 15:59:44 +00:00
test/tint Add option to auto generate bindings for external textures 2022-04-06 13:57:54 +00:00
third_party Normalize DEPS to ease merging with Dawn 2022-03-28 18:01:02 +00:00
tools test-runner: add 'fxc-and-dxc' arg to run both FXC and DXC for HLSL 2022-03-28 20:17:22 +00:00
.clang-format Initial commit 2020-03-02 15:47:43 -05:00
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.gn build: Update tint to use C++17. 2022-01-06 09:23:11 +00:00
AUTHORS Add spirv-tools fuzzer 2021-06-24 18:10:46 +00:00
BUILD.gn tint->dawn: Shuffle source tree in preperation of merging repos 2022-02-21 15:19:07 +00:00
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CODE_OF_CONDUCT.md Initial commit 2020-03-02 15:47:43 -05:00
CONTRIBUTING.md tint->dawn: Shuffle source tree in preperation of merging repos 2022-02-21 15:19:07 +00:00
CPPLINT.cfg Adding PRESUBMIT.py with a bunch of checks turned on 2020-06-03 13:41:41 +00:00
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Doxyfile builtins: Add countLeadingZeros 2022-02-22 23:13:39 +00:00
LICENSE Initial commit 2020-03-02 15:47:43 -05:00
OWNERS Clean up OWNERS file 2022-03-21 15:56:50 +00:00
PRESUBMIT.py Fix legacy non-inclusive language issues 2022-02-17 15:03:19 +00:00
README.md tint->dawn: Shuffle source tree in preperation of merging repos 2022-02-21 15:19:07 +00:00
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README.md

Tint

Tint is a compiler for the WebGPU Shader Language (WGSL).

This is not an officially supported Google product.

Requirements

  • Git
  • CMake (3.10.2 or later)
  • Ninja (or other build tool)
  • Python, for fetching dependencies
  • depot_tools in your path

Build options

  • 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)

Building

Tint uses Chromium dependency management so you need to install depot_tools and add it to your PATH.

Getting source & dependencies

# 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

Compiling using CMake + Ninja

mkdir -p out/Debug
cd out/Debug
cmake -GNinja ../..
ninja # or autoninja

Compiling using CMake + make

mkdir -p out/Debug
cd out/Debug
cmake ../..
make # -j N for N-way parallel build

Compiling using gn + ninja

mkdir -p out/Debug
gn gen out/Debug
autoninja -C out/Debug

Fuzzers on MacOS

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.

Checking [chromium-style] issues in CMake builds

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 TINT_CHECK_CHROMIUM_STYLE to ON.

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

Issues

Please file any issues or feature requests at https://bugs.chromium.org/p/tint/issues/entry

Contributing

Please see the CONTRIBUTING and CODE_OF_CONDUCT files on how to contribute to Tint.

Tint has a process for supporting experimental extensions.