LLVM  4.0.0
SymbolDeserializer.h
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1 //===- SymbolDeserializer.h -------------------------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef LLVM_DEBUGINFO_CODEVIEW_SYMBOLDESERIALIZER_H
11 #define LLVM_DEBUGINFO_CODEVIEW_SYMBOLDESERIALIZER_H
12 
13 #include "llvm/ADT/ArrayRef.h"
20 #include "llvm/Support/Error.h"
21 
22 namespace llvm {
23 namespace codeview {
24 class SymbolVisitorDelegate;
26  struct MappingInfo {
27  explicit MappingInfo(ArrayRef<uint8_t> RecordData)
28  : Stream(RecordData), Reader(Stream), Mapping(Reader) {}
29 
30  msf::ByteStream Stream;
31  msf::StreamReader Reader;
32  SymbolRecordMapping Mapping;
33  };
34 
35 public:
37  : Delegate(Delegate) {}
38 
40  assert(!Mapping && "Already in a symbol mapping!");
41  Mapping = llvm::make_unique<MappingInfo>(Record.content());
42  return Mapping->Mapping.visitSymbolBegin(Record);
43  }
45  assert(Mapping && "Not in a symbol mapping!");
46  auto EC = Mapping->Mapping.visitSymbolEnd(Record);
47  Mapping.reset();
48  return EC;
49  }
50 
51 #define SYMBOL_RECORD(EnumName, EnumVal, Name) \
52  Error visitKnownRecord(CVSymbol &CVR, Name &Record) override { \
53  return visitKnownRecordImpl(CVR, Record); \
54  }
55 #define SYMBOL_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
56 #include "CVSymbolTypes.def"
57 
58 private:
59  template <typename T> Error visitKnownRecordImpl(CVSymbol &CVR, T &Record) {
60 
61  Record.RecordOffset =
62  Delegate ? Delegate->getRecordOffset(Mapping->Reader) : 0;
63  if (auto EC = Mapping->Mapping.visitKnownRecord(CVR, Record))
64  return EC;
65  return Error::success();
66  }
67 
68  SymbolVisitorDelegate *Delegate;
69  std::unique_ptr<MappingInfo> Mapping;
70 };
71 }
72 }
73 
74 #endif
SymbolDeserializer(SymbolVisitorDelegate *Delegate)
virtual uint32_t getRecordOffset(msf::StreamReader Reader)=0
CVRecord< SymbolKind > CVSymbol
Definition: SymbolRecord.h:940
static ErrorSuccess success()
Create a success value.
ArrayRef< uint8_t > content() const
Definition: CVRecord.h:36
Error visitSymbolEnd(CVSymbol &Record) override
Error visitSymbolBegin(CVSymbol &Record) override
Paired begin/end actions for all symbols.
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
Lightweight error class with error context and mandatory checking.