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51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
//===- FDRRecordProducer.h - XRay FDR Mode Record Producer ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_XRAY_FDRRECORDPRODUCER_H
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#define LLVM_XRAY_FDRRECORDPRODUCER_H
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#include "llvm/Support/Error.h"
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#include "llvm/XRay/FDRRecords.h"
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#include "llvm/XRay/XRayRecord.h"
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#include <memory>
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namespace llvm {
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namespace xray {
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class RecordProducer {
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public:
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/// All producer implementations must yield either an Error or a non-nullptr
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/// unique_ptr<Record>.
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virtual Expected<std::unique_ptr<Record>> produce() = 0;
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virtual ~RecordProducer() = default;
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};
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class FileBasedRecordProducer : public RecordProducer {
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const XRayFileHeader &Header;
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DataExtractor &E;
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uint64_t &OffsetPtr;
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uint32_t CurrentBufferBytes = 0;
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// Helper function which gets the next record by speculatively reading through
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// the log, finding a buffer extents record.
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Expected<std::unique_ptr<Record>> findNextBufferExtent();
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public:
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FileBasedRecordProducer(const XRayFileHeader &FH, DataExtractor &DE,
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uint64_t &OP)
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: Header(FH), E(DE), OffsetPtr(OP) {}
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/// This producer encapsulates the logic for loading a File-backed
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/// RecordProducer hidden behind a DataExtractor.
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Expected<std::unique_ptr<Record>> produce() override;
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};
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} // namespace xray
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} // namespace llvm
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#endif // LLVM_XRAY_FDRRECORDPRODUCER_H
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