LLVM  10.0.0svn
FDRRecordProducer.h
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1 //===- FDRRecordProducer.h - XRay FDR Mode Record Producer ----------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 #ifndef LLVM_INCLUDE_LLVM_XRAY_FDRRECORDPRODUCER_H_
9 #define LLVM_INCLUDE_LLVM_XRAY_FDRRECORDPRODUCER_H_
10 
11 #include "llvm/Support/Error.h"
12 #include "llvm/XRay/FDRRecords.h"
13 #include "llvm/XRay/XRayRecord.h"
14 #include <memory>
15 
16 namespace llvm {
17 namespace xray {
18 
20 public:
21  /// All producer implementations must yield either an Error or a non-nullptr
22  /// unique_ptr<Record>.
24  virtual ~RecordProducer() = default;
25 };
26 
28  const XRayFileHeader &Header;
30  uint64_t &OffsetPtr;
31  uint32_t CurrentBufferBytes = 0;
32 
33  // Helper function which gets the next record by speculatively reading through
34  // the log, finding a buffer extents record.
35  Expected<std::unique_ptr<Record>> findNextBufferExtent();
36 
37 public:
39  uint64_t &OP)
40  : Header(FH), E(DE), OffsetPtr(OP) {}
41 
42  /// This producer encapsulates the logic for loading a File-backed
43  /// RecordProducer hidden behind a DataExtractor.
45 };
46 
47 } // namespace xray
48 } // namespace llvm
49 
50 #endif // LLVM_INCLUDE_LLVM_XRAY_FDRRECORDPRODUCER_H_
This class represents lattice values for constants.
Definition: AllocatorList.h:23
FileBasedRecordProducer(const XRayFileHeader &FH, DataExtractor &DE, uint64_t &OP)
virtual ~RecordProducer()=default
Tagged union holding either a T or a Error.
Definition: yaml2obj.h:21
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
virtual Expected< std::unique_ptr< Record > > produce()=0
All producer implementations must yield either an Error or a non-nullptr unique_ptr<Record>.
XRay traces all have a header providing some top-matter information useful to help tools determine ho...
Definition: XRayRecord.h:27
#define OP(n)
Definition: regex2.h:73