blob: b530a85bc7e13334f5fcb0f714983529f5954363 [file] [log] [blame]
//===- FDRRecordProducer.h - XRay FDR Mode Record Producer ----------------===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "llvm/Support/Error.h"
#include "llvm/XRay/FDRRecords.h"
#include "llvm/XRay/XRayRecord.h"
#include <memory>
namespace llvm {
namespace xray {
class RecordProducer {
/// All producer implementations must yield either an Error or a non-nullptr
/// unique_ptr<Record>.
virtual Expected<std::unique_ptr<Record>> produce() = 0;
virtual ~RecordProducer() = default;
class FileBasedRecordProducer : public RecordProducer {
const XRayFileHeader &Header;
DataExtractor &E;
uint32_t &OffsetPtr;
uint32_t CurrentBufferBytes = 0;
// Helper function which gets the next record by speculatively reading through
// the log, finding a buffer extents record.
Expected<std::unique_ptr<Record>> findNextBufferExtent();
FileBasedRecordProducer(const XRayFileHeader &FH, DataExtractor &DE,
uint32_t &OP)
: Header(FH), E(DE), OffsetPtr(OP) {}
/// This producer encapsulates the logic for loading a File-backed
/// RecordProducer hidden behind a DataExtractor.
Expected<std::unique_ptr<Record>> produce() override;
} // namespace xray
} // namespace llvm