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https://github.com/KhronosGroup/SPIRV-Tools
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9c4481419e
spirv-fuzz features transformations that should be applicable by construction. Assertions are used to detect when such transformations turn out to be inapplicable. Failures of such assertions indicate bugs in the fuzzer. However, when using the fuzzer at scale (e.g. in ClusterFuzz) reports of these assertion failures create noise, and cause the fuzzer to exit early. This change adds an option whereby inapplicable transformations can be ignored. This reduces noise and allows fuzzing to continue even when a transformation that should be applicable but is not has been erroneously created.
71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
// Copyright (c) 2019 Google LLC
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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 SOURCE_FUZZ_FUZZER_PASS_CONSTRUCT_COMPOSITES_H_
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#define SOURCE_FUZZ_FUZZER_PASS_CONSTRUCT_COMPOSITES_H_
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#include <unordered_map>
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#include <vector>
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#include "source/fuzz/fuzzer_pass.h"
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namespace spvtools {
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namespace fuzz {
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// A fuzzer pass for constructing composite objects from smaller objects.
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class FuzzerPassConstructComposites : public FuzzerPass {
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public:
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FuzzerPassConstructComposites(
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opt::IRContext* ir_context, TransformationContext* transformation_context,
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FuzzerContext* fuzzer_context,
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protobufs::TransformationSequence* transformations,
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bool ignore_inapplicable_transformations);
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void Apply() override;
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private:
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// Used to map a type id to the ids of relevant instructions of the type.
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using TypeIdToInstructions =
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std::unordered_map<uint32_t, std::vector<uint32_t>>;
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// Requires that |array_type_instruction| has opcode OpTypeArray.
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// Attempts to find suitable instruction result ids from the values of
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// |type_id_to_available_instructions| that would allow a composite of type
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// |array_type_instruction| to be constructed. Returns said ids if they can
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// be found and an empty vector otherwise.
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std::vector<uint32_t> FindComponentsToConstructArray(
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const opt::Instruction& array_type_instruction,
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const TypeIdToInstructions& type_id_to_available_instructions);
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// Similar to FindComponentsToConstructArray, but for matrices.
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std::vector<uint32_t> FindComponentsToConstructMatrix(
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const opt::Instruction& matrix_type_instruction,
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const TypeIdToInstructions& type_id_to_available_instructions);
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// Similar to FindComponentsToConstructArray, but for structs.
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std::vector<uint32_t> FindComponentsToConstructStruct(
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const opt::Instruction& struct_type_instruction,
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const TypeIdToInstructions& type_id_to_available_instructions);
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// Similar to FindComponentsToConstructArray, but for vectors.
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std::vector<uint32_t> FindComponentsToConstructVector(
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const opt::Instruction& vector_type_instruction,
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const TypeIdToInstructions& type_id_to_available_instructions);
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_FUZZER_PASS_CONSTRUCT_COMPOSITES_H_
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