Ryan Harrison | c57642c | 2021-09-30 18:58:32 +0000 | [diff] [blame] | 1 | // Copyright 2021 The Tint Authors. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | #ifndef FUZZERS_TRANSFORM_BUILDER_H_ |
| 16 | #define FUZZERS_TRANSFORM_BUILDER_H_ |
| 17 | |
| 18 | #include <string> |
| 19 | #include <vector> |
| 20 | |
| 21 | #include "include/tint/tint.h" |
| 22 | |
| 23 | #include "fuzzers/data_builder.h" |
| 24 | |
| 25 | namespace tint { |
| 26 | namespace fuzzers { |
| 27 | |
| 28 | /// Fuzzer utility class to build inputs for transforms and setup the transform |
| 29 | /// manager. |
| 30 | class TransformBuilder { |
| 31 | public: |
Ryan Harrison | d3f628b | 2021-11-01 18:14:42 +0000 | [diff] [blame] | 32 | /// @brief Initializes the internal builder using a seed value |
| 33 | /// @param seed - seed value passed to engine |
| 34 | explicit TransformBuilder(uint64_t seed) : builder_(seed) {} |
| 35 | |
| 36 | /// @brief Initializes the internal builder using seed data |
| 37 | /// @param data - data fuzzer to calculate seed from |
Ryan Harrison | c57642c | 2021-09-30 18:58:32 +0000 | [diff] [blame] | 38 | /// @param size - size of data buffer |
| 39 | explicit TransformBuilder(const uint8_t* data, size_t size) |
Ryan Harrison | d3f628b | 2021-11-01 18:14:42 +0000 | [diff] [blame] | 40 | : builder_(data, size) { |
| 41 | assert(data != nullptr && "|data| must be !nullptr"); |
| 42 | } |
| 43 | |
| 44 | ~TransformBuilder() = default; |
Ryan Harrison | c57642c | 2021-09-30 18:58:32 +0000 | [diff] [blame] | 45 | |
| 46 | transform::Manager* manager() { return &manager_; } |
| 47 | transform::DataMap* data_map() { return &data_map_; } |
Ryan Harrison | c57642c | 2021-09-30 18:58:32 +0000 | [diff] [blame] | 48 | |
| 49 | /// Adds a transform and needed data to |manager_| and |data_map_|. |
| 50 | /// @tparam T - A class that inherits from transform::Transform and has an |
| 51 | /// explicit specialization in AddTransformImpl. |
| 52 | template <typename T> |
| 53 | void AddTransform() { |
| 54 | static_assert(std::is_base_of<transform::Transform, T>::value, |
| 55 | "T is not a transform::Transform"); |
| 56 | AddTransformImpl<T>::impl(this); |
| 57 | } |
| 58 | |
| 59 | /// Helper that invokes Add*Transform for all of the platform independent |
| 60 | /// passes. |
| 61 | void AddPlatformIndependentPasses() { |
| 62 | AddTransform<transform::Robustness>(); |
| 63 | AddTransform<transform::FirstIndexOffset>(); |
| 64 | AddTransform<transform::BindingRemapper>(); |
| 65 | AddTransform<transform::Renamer>(); |
| 66 | AddTransform<transform::SingleEntryPoint>(); |
| 67 | AddTransform<transform::VertexPulling>(); |
| 68 | } |
| 69 | |
| 70 | private: |
| 71 | DataBuilder builder_; |
| 72 | transform::Manager manager_; |
| 73 | transform::DataMap data_map_; |
| 74 | |
Ryan Harrison | d3f628b | 2021-11-01 18:14:42 +0000 | [diff] [blame] | 75 | DataBuilder* builder() { return &builder_; } |
| 76 | |
Ryan Harrison | c57642c | 2021-09-30 18:58:32 +0000 | [diff] [blame] | 77 | /// Implementation of AddTransform, specialized for each transform that is |
| 78 | /// implemented. Default implementation intentionally deleted to cause compile |
| 79 | /// error if unimplemented type passed in. |
| 80 | /// @tparam T - A fuzzer transform |
| 81 | template <typename T> |
| 82 | struct AddTransformImpl; |
| 83 | |
| 84 | /// Implementation of AddTransform for transform::Robustness |
| 85 | template <> |
| 86 | struct AddTransformImpl<transform::Robustness> { |
| 87 | /// Add instance of transform::Robustness to TransformBuilder |
| 88 | /// @param tb - TransformBuilder to add transform to |
| 89 | static void impl(TransformBuilder* tb) { |
| 90 | tb->manager()->Add<transform::Robustness>(); |
| 91 | } |
| 92 | }; |
| 93 | |
| 94 | /// Implementation of AddTransform for transform::FirstIndexOffset |
| 95 | template <> |
| 96 | struct AddTransformImpl<transform::FirstIndexOffset> { |
| 97 | /// Add instance of transform::FirstIndexOffset to TransformBuilder |
| 98 | /// @param tb - TransformBuilder to add transform to |
| 99 | static void impl(TransformBuilder* tb) { |
| 100 | struct Config { |
| 101 | uint32_t group; |
| 102 | uint32_t binding; |
| 103 | }; |
| 104 | |
| 105 | Config config = tb->builder()->build<Config>(); |
| 106 | |
| 107 | tb->data_map()->Add<tint::transform::FirstIndexOffset::BindingPoint>( |
| 108 | config.binding, config.group); |
| 109 | tb->manager()->Add<transform::FirstIndexOffset>(); |
| 110 | } |
| 111 | }; |
| 112 | |
| 113 | /// Implementation of AddTransform for transform::BindingRemapper |
| 114 | template <> |
| 115 | struct AddTransformImpl<transform::BindingRemapper> { |
| 116 | /// Add instance of transform::BindingRemapper to TransformBuilder |
| 117 | /// @param tb - TransformBuilder to add transform to |
| 118 | static void impl(TransformBuilder* tb) { |
| 119 | struct Config { |
| 120 | uint8_t old_group; |
| 121 | uint8_t old_binding; |
| 122 | uint8_t new_group; |
| 123 | uint8_t new_binding; |
| 124 | ast::Access new_access; |
| 125 | }; |
| 126 | |
| 127 | std::vector<Config> configs = tb->builder()->vector<Config>(); |
| 128 | transform::BindingRemapper::BindingPoints binding_points; |
| 129 | transform::BindingRemapper::AccessControls accesses; |
| 130 | for (const auto& config : configs) { |
| 131 | binding_points[{config.old_binding, config.old_group}] = { |
| 132 | config.new_binding, config.new_group}; |
| 133 | accesses[{config.old_binding, config.old_group}] = config.new_access; |
| 134 | } |
| 135 | |
| 136 | tb->data_map()->Add<transform::BindingRemapper::Remappings>( |
| 137 | binding_points, accesses, tb->builder()->build<bool>()); |
| 138 | tb->manager()->Add<transform::BindingRemapper>(); |
| 139 | } |
| 140 | }; |
| 141 | |
| 142 | /// Implementation of AddTransform for transform::Renamer |
| 143 | template <> |
| 144 | struct AddTransformImpl<transform::Renamer> { |
| 145 | /// Add instance of transform::Renamer to TransformBuilder |
| 146 | /// @param tb - TransformBuilder to add transform to |
| 147 | static void impl(TransformBuilder* tb) { |
| 148 | tb->manager()->Add<transform::Renamer>(); |
| 149 | } |
| 150 | }; |
| 151 | |
| 152 | /// Implementation of AddTransform for transform::SingleEntryPoint |
| 153 | template <> |
| 154 | struct AddTransformImpl<transform::SingleEntryPoint> { |
| 155 | /// Add instance of transform::SingleEntryPoint to TransformBuilder |
| 156 | /// @param tb - TransformBuilder to add transform to |
| 157 | static void impl(TransformBuilder* tb) { |
| 158 | auto input = tb->builder()->build<std::string>(); |
| 159 | transform::SingleEntryPoint::Config cfg(input); |
| 160 | |
| 161 | tb->data_map()->Add<transform::SingleEntryPoint::Config>(cfg); |
| 162 | tb->manager()->Add<transform::SingleEntryPoint>(); |
| 163 | } |
| 164 | }; // struct AddTransformImpl<transform::SingleEntryPoint> |
| 165 | |
| 166 | /// Implementation of AddTransform for transform::VertexPulling |
| 167 | template <> |
| 168 | struct AddTransformImpl<transform::VertexPulling> { |
| 169 | /// Add instance of transform::VertexPulling to TransformBuilder |
| 170 | /// @param tb - TransformBuilder to add transform to |
| 171 | static void impl(TransformBuilder* tb) { |
| 172 | transform::VertexPulling::Config cfg; |
| 173 | cfg.entry_point_name = tb->builder()->build<std::string>(); |
| 174 | cfg.vertex_state = |
| 175 | tb->builder()->vector<transform::VertexBufferLayoutDescriptor>( |
| 176 | GenerateVertexBufferLayoutDescriptor); |
| 177 | cfg.pulling_group = tb->builder()->build<uint32_t>(); |
| 178 | |
| 179 | tb->data_map()->Add<transform::VertexPulling::Config>(cfg); |
| 180 | tb->manager()->Add<transform::VertexPulling>(); |
| 181 | } |
| 182 | |
| 183 | private: |
| 184 | /// Generate an instance of transform::VertexAttributeDescriptor |
| 185 | /// @param b - DataBuilder to use |
| 186 | static transform::VertexAttributeDescriptor |
| 187 | GenerateVertexAttributeDescriptor(DataBuilder* b) { |
| 188 | transform::VertexAttributeDescriptor desc{}; |
| 189 | desc.format = b->enum_class<transform::VertexFormat>( |
| 190 | static_cast<uint8_t>(transform::VertexFormat::kLastEntry) + 1); |
| 191 | desc.offset = b->build<uint32_t>(); |
| 192 | desc.shader_location = b->build<uint32_t>(); |
| 193 | return desc; |
| 194 | } |
| 195 | |
| 196 | /// Generate an instance of VertexBufferLayoutDescriptor |
| 197 | /// @param b - DataBuilder to use |
| 198 | static transform::VertexBufferLayoutDescriptor |
| 199 | GenerateVertexBufferLayoutDescriptor(DataBuilder* b) { |
| 200 | transform::VertexBufferLayoutDescriptor desc; |
| 201 | desc.array_stride = b->build<uint32_t>(); |
| 202 | desc.step_mode = b->enum_class<transform::VertexStepMode>( |
| 203 | static_cast<uint8_t>(transform::VertexStepMode::kLastEntry) + 1); |
| 204 | desc.attributes = b->vector<transform::VertexAttributeDescriptor>( |
| 205 | GenerateVertexAttributeDescriptor); |
| 206 | return desc; |
| 207 | } |
| 208 | }; |
| 209 | }; // class TransformBuilder |
| 210 | |
| 211 | } // namespace fuzzers |
| 212 | } // namespace tint |
| 213 | |
| 214 | #endif // FUZZERS_TRANSFORM_BUILDER_H_ |