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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.
80 lines
3.2 KiB
C++
80 lines
3.2 KiB
C++
// Copyright (c) 2020 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_ADD_EQUATION_INSTRUCTIONS_H_
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#define SOURCE_FUZZ_FUZZER_PASS_ADD_EQUATION_INSTRUCTIONS_H_
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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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// Fuzzer pass that sprinkles instructions through the module that define
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// equations using various arithmetic and logical operators.
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class FuzzerPassAddEquationInstructions : public FuzzerPass {
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public:
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FuzzerPassAddEquationInstructions(
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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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// Yields those instructions in |instructions| that have integer scalar or
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// vector result type.
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std::vector<opt::Instruction*> GetIntegerInstructions(
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const std::vector<opt::Instruction*>& instructions) const;
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// Returns only instructions, that have either a scalar floating-point or a
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// vector type.
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std::vector<opt::Instruction*> GetFloatInstructions(
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const std::vector<opt::Instruction*>& instructions) const;
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// Yields those instructions in |instructions| that have boolean scalar or
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// vector result type.
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std::vector<opt::Instruction*> GetBooleanInstructions(
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const std::vector<opt::Instruction*>& instructions) const;
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// Yields those instructions in |instructions| that have a scalar numerical or
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// a vector of numerical components type. Only 16, 32 and 64-bit numericals
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// are supported if both OpTypeInt and OpTypeFloat instructions can be created
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// with the specified width (e.g. for 16-bit types both Float16 and Int16
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// capabilities must be present).
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std::vector<opt::Instruction*> GetNumericalInstructions(
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const std::vector<opt::Instruction*>& instructions) const;
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// Requires that |instructions| are scalars or vectors of some type. Returns
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// only those instructions whose width is |width|. If |width| is 1 this means
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// the scalars.
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std::vector<opt::Instruction*> RestrictToVectorWidth(
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const std::vector<opt::Instruction*>& instructions,
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uint32_t vector_width) const;
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// Requires that |instructions| are integer or float scalars or vectors.
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// Returns only those instructions for which the bit-width of the underlying
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// integer or floating-point type is |bit_width|.
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std::vector<opt::Instruction*> RestrictToElementBitWidth(
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const std::vector<opt::Instruction*>& instructions,
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uint32_t bit_width) const;
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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_ADD_EQUATION_INSTRUCTIONS_H_
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