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60 lines
2.1 KiB
60 lines
2.1 KiB
// Copyright 2023 The Centipede Authors.
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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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// https://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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// Abstraction of metadata collected from executions that does not
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// contribute to coverage but can be useful in mutation.
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//
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// This library is for both engine and runner.
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#ifndef THIRD_PARTY_CENTIPEDE_EXECUTION_METADATA_H_
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#define THIRD_PARTY_CENTIPEDE_EXECUTION_METADATA_H_
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#include <functional>
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#include "./centipede/shared_memory_blob_sequence.h"
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#include "./common/defs.h"
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namespace fuzztest::internal {
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struct ExecutionMetadata {
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// Appends a CMP entry comparing `a` and `b` to the metadata. Returns false if
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// the entry cannot be appended. Return true otherwise.
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bool AppendCmpEntry(ByteSpan a, ByteSpan b);
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// Enumerates through all CMP entries in the metadata by calling
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// `callback` on each of them. Returns false if there are invalid
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// entries. Returns true otherwise.
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bool ForEachCmpEntry(std::function<void(ByteSpan, ByteSpan)> callback) const;
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// Writes the contents to `outputs_blobseq` with header `tag`. Returns true
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// iff successful.
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bool Write(Blob::SizeAndTagT tag, BlobSequence &outputs_blobseq) const;
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// Reads the contents from `blob`.
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//
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// Note that the method does not check the blob tag, it should be checked by
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// the method users.
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void Read(Blob blob);
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// CMP entries are stored in one large ByteArray to minimize RAM consumption.
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// One CMP arg pair is stored as
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// * `size` (1-byte value)
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// * `value0` (`size` bytes)
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// * `value1` (`size` bytes)
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ByteArray cmp_data;
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};
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} // namespace fuzztest::internal
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#endif // THIRD_PARTY_CENTIPEDE_EXECUTION_METADATA_H_
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