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A fuzzer that mutates a WGSL code by finding two regions enclosed by semicolons and swapping them randomly. Change-Id: I5b14eb21fd2924227d05ac516f806c6e2efa6198 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/58395 Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Alastair Donaldson <afdx@google.com> Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: Alastair Donaldson <afdx@google.com>
69 lines
2.8 KiB
C++
69 lines
2.8 KiB
C++
// Copyright 2021 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef FUZZERS_TINT_REGEX_FUZZER_WGSL_MUTATOR_H_
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#define FUZZERS_TINT_REGEX_FUZZER_WGSL_MUTATOR_H_
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#include <random>
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#include <string>
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#include <utility>
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#include <vector>
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namespace tint {
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namespace fuzzers {
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namespace regex_fuzzer {
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/// A function that given a delimiter, returns a vector that contains
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/// all the positions of the delimiter in the WGSL code.
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/// @param delimiter - the delimiter of the enclosed region.
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/// @param wgsl_code - the initial string (WGSL code) that will be mutated.
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/// @return a vector with the positions of the delimiter in the WGSL code.
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std::vector<size_t> FindDelimiterIndices(const std::string& delimiter,
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const std::string& wgsl_code);
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/// Given 4 indices, idx1, idx2, idx3 and idx4 it swaps the regions
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/// in the interval [idx1, idx2] with the region in the interval [idx3, idx4]
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/// in wgsl_text.
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/// @param idx1 - starting index of the first region.
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/// @param idx2 - terminating index of the second region.
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/// @param idx3 - starting index of the second region.
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/// @param idx4 - terminating index of the second region.
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/// @param wgsl_code - the string where the swap will occur.
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void SwapIntervals(size_t idx1,
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size_t idx2,
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size_t idx3,
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size_t idx4,
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std::string* wgsl_code);
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/// A function that, given an initial string (valid WGSL code) and a delimiter,
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/// generates a new set of strings (valid or invalid WGSL code) by
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/// picking two random regions and swapping them.
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/// @param wgsl_code - the initial string (WGSL code) that will be mutated.
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/// @param size - size of the string that will be mutated.
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/// @param max_size - maximal allowed mutation size.
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/// @param delimiter - the delimiter that will be used to find enclosed regions.
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/// @param generator - the random number generator.
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/// @return size of the mutated string.
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size_t FuzzEnclosedRegions(size_t size,
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size_t max_size,
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const std::string& delimiter,
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uint8_t* wgsl_code,
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std::mt19937* generator);
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} // namespace regex_fuzzer
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} // namespace fuzzers
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} // namespace tint
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#endif // FUZZERS_TINT_REGEX_FUZZER_WGSL_MUTATOR_H_
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