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https://github.com/KhronosGroup/SPIRV-Tools
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fcb22ecf0f
Adds a virtual method, GetFreshIds(), to Transformation. Every transformation uses this to indicate which ids in its protobuf message are fresh ids. This means that when replaying a sequence of transformations the replayer can obtain a smallest id that is not in use by the module already and that will not be used by any transformation by necessity. Ids greater than or equal to this id can be used as overflow ids. Fixes #3851.
50 lines
1.6 KiB
C++
50 lines
1.6 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_COUNTER_OVERFLOW_ID_SOURCE_H_
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#define SOURCE_FUZZ_COUNTER_OVERFLOW_ID_SOURCE_H_
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#include "source/fuzz/overflow_id_source.h"
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namespace spvtools {
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namespace fuzz {
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// A source of overflow ids that uses a counter to provide successive ids from
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// a given starting value.
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class CounterOverflowIdSource : public OverflowIdSource {
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public:
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// |first_available_id| is the starting value for the counter.
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explicit CounterOverflowIdSource(uint32_t first_available_id);
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// Always returns true.
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bool HasOverflowIds() const override;
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// Returns the current counter value and increments the counter.
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// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/2541) We should
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// account for the case where the maximum allowed id is reached.
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uint32_t GetNextOverflowId() override;
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const std::unordered_set<uint32_t>& GetIssuedOverflowIds() const override;
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private:
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uint32_t next_available_id_;
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std::unordered_set<uint32_t> issued_ids_;
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_OVERFLOW_ID_SOURCE_COUNTER_H_
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