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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.
51 lines
2.0 KiB
C++
51 lines
2.0 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_APPLY_ID_SYNONYMS_H_
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#define SOURCE_FUZZ_FUZZER_PASS_APPLY_ID_SYNONYMS_H_
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#include "source/fuzz/fuzzer_pass.h"
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace fuzz {
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// A pass that replaces ids with other ids, or accesses into structures, that
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// are known to hold the same values.
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class FuzzerPassApplyIdSynonyms : public FuzzerPass {
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public:
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FuzzerPassApplyIdSynonyms(opt::IRContext* ir_context,
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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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// Returns true if uses of |dd1| can be replaced with |dd2| and vice-versa
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// with respect to the type. Concretely, returns true if |dd1| and |dd2| have
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// the same type or both |dd1| and |dd2| are either a numerical or a vector
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// type of integral components with possibly different signedness.
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bool DataDescriptorsHaveCompatibleTypes(SpvOp opcode,
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uint32_t use_in_operand_index,
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const protobufs::DataDescriptor& dd1,
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const protobufs::DataDescriptor& dd2);
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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_APPLY_ID_SYNONYMS_H_
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