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c6bcab02fd
This change implements a new fuzzer. It mutates a WGSL shader by traversing the AST of a program and applying various transformations that might or might not be semantics preserving. Change-Id: I6b144bd1067444c3f0b815ba1a646aaf6e739b52 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/52160 Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Vasyl Teliman <vasniktel@gmail.com> Reviewed-by: Alastair Donaldson <allydonaldson@googlemail.com> Reviewed-by: Ben Clayton <bclayton@google.com>
40 lines
1.3 KiB
C++
40 lines
1.3 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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#include "fuzzers/tint_ast_fuzzer/probability_context.h"
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namespace tint {
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namespace fuzzers {
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namespace ast_fuzzer {
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namespace {
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const std::pair<uint32_t, uint32_t> kChanceOfReplacingIdentifiers = {30, 70};
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} // namespace
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ProbabilityContext::ProbabilityContext(RandomNumberGenerator* rng)
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: rng_(rng),
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chance_of_replacing_identifiers_(
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RandomFromRange(kChanceOfReplacingIdentifiers)) {}
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uint32_t ProbabilityContext::RandomFromRange(
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std::pair<uint32_t, uint32_t> range) {
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assert(range.first <= range.second && "Range must be non-decreasing");
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return range.first + rng_->RandomUint32(range.second - range.first + 1);
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}
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} // namespace ast_fuzzer
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} // namespace fuzzers
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} // namespace tint
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