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https://github.com/KhronosGroup/SPIRV-Tools
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5d491a7ed6
The fuzzer pass that constructs composites had an issue where it would regard isomorphic but distinct structs (similarly arrays) as being interchangeable when constructing composites. This change fixes the problem by relying less on the type manager.
81 lines
3.1 KiB
C++
81 lines
3.1 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 "source/fuzz/fuzzer_pass.h"
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#include <map>
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#include <vector>
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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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~FuzzerPassConstructComposites();
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void Apply() override;
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private:
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// Used to map a type id to relevant instructions whose result type matches
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// the type id.
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typedef std::map<uint32_t, std::vector<opt::Instruction*>>
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TypeIdToInstructions;
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// Considers all instructions that are available at |inst| - instructions
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// whose results could be packed into a composite - and updates
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// |type_id_to_available_instructions| so that each such instruction is
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// associated with its the id of its result type.
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void RecordAvailableInstruction(
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opt::Instruction* inst,
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TypeIdToInstructions* type_id_to_available_instructions);
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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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