65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
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// 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_CONTEXT_H_
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#define SOURCE_FUZZ_FUZZER_CONTEXT_H_
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#include "source/fuzz/random_generator.h"
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#include "source/opt/function.h"
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namespace spvtools {
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namespace fuzz {
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// Encapsulates all parameters that control the fuzzing process, such as the
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// source of randomness and the probabilities with which transformations are
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// applied.
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class FuzzerContext {
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public:
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// Constructs a fuzzer context with a given random generator and the minimum
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// value that can be used for fresh ids.
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FuzzerContext(RandomGenerator* random_generator, uint32_t min_fresh_id);
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~FuzzerContext();
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// Provides the random generator used to control fuzzing.
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RandomGenerator* GetRandomGenerator();
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// Yields an id that is guaranteed not to be used in the module being fuzzed,
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// or to have been issued before.
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uint32_t GetFreshId();
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// Probabilities associated with applying various transformations.
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// Keep them in alphabetical order.
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uint32_t GetChanceOfAddingDeadBreak() { return chance_of_adding_dead_break_; }
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uint32_t GetChanceOfMovingBlockDown() { return chance_of_moving_block_down_; }
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uint32_t GetChanceOfSplittingBlock() { return chance_of_splitting_block_; }
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private:
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// The source of randomness.
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RandomGenerator* random_generator_;
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// The next fresh id to be issued.
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uint32_t next_fresh_id_;
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// Probabilities associated with applying various transformations.
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// Keep them in alphabetical order.
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uint32_t chance_of_adding_dead_break_;
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uint32_t chance_of_moving_block_down_;
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uint32_t chance_of_splitting_block_;
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_FUZZER_CONTEXT_H_
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