| // Copyright (c) 2020 Vasyl Teliman |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "source/fuzz/fuzzer_pass_permute_function_parameters.h" |
| |
| #include <numeric> |
| #include <vector> |
| |
| #include "source/fuzz/fuzzer_context.h" |
| #include "source/fuzz/fuzzer_util.h" |
| #include "source/fuzz/instruction_descriptor.h" |
| #include "source/fuzz/transformation_permute_function_parameters.h" |
| |
| namespace spvtools { |
| namespace fuzz { |
| |
| FuzzerPassPermuteFunctionParameters::FuzzerPassPermuteFunctionParameters( |
| opt::IRContext* ir_context, TransformationContext* transformation_context, |
| FuzzerContext* fuzzer_context, |
| protobufs::TransformationSequence* transformations, |
| bool ignore_inapplicable_transformations) |
| : FuzzerPass(ir_context, transformation_context, fuzzer_context, |
| transformations, ignore_inapplicable_transformations) {} |
| |
| void FuzzerPassPermuteFunctionParameters::Apply() { |
| for (const auto& function : *GetIRContext()->module()) { |
| uint32_t function_id = function.result_id(); |
| |
| // Skip the function if it is an entry point |
| if (fuzzerutil::FunctionIsEntryPoint(GetIRContext(), function_id)) { |
| continue; |
| } |
| |
| if (!GetFuzzerContext()->ChoosePercentage( |
| GetFuzzerContext()->GetChanceOfPermutingParameters())) { |
| continue; |
| } |
| |
| // Compute permutation for parameters |
| auto* function_type = |
| fuzzerutil::GetFunctionType(GetIRContext(), &function); |
| assert(function_type && "Function type is null"); |
| |
| // Don't take return type into account |
| uint32_t arg_size = function_type->NumInOperands() - 1; |
| |
| // Create a vector, fill it with [0, n-1] values and shuffle it |
| std::vector<uint32_t> permutation(arg_size); |
| std::iota(permutation.begin(), permutation.end(), 0); |
| GetFuzzerContext()->Shuffle(&permutation); |
| |
| // Apply our transformation |
| ApplyTransformation(TransformationPermuteFunctionParameters( |
| function_id, GetFuzzerContext()->GetFreshId(), permutation)); |
| } |
| } |
| |
| } // namespace fuzz |
| } // namespace spvtools |