LLVM  8.0.0svn
PDBSymbolFunc.cpp
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1 //===- PDBSymbolFunc.cpp - --------------------------------------*- 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 
11 
19 
20 #include <unordered_set>
21 #include <utility>
22 #include <vector>
23 
24 using namespace llvm;
25 using namespace llvm::pdb;
26 
27 namespace {
28 class FunctionArgEnumerator : public IPDBEnumChildren<PDBSymbolData> {
29 public:
30  typedef ConcreteSymbolEnumerator<PDBSymbolData> ArgEnumeratorType;
31 
32  FunctionArgEnumerator(const IPDBSession &PDBSession,
33  const PDBSymbolFunc &PDBFunc)
34  : Session(PDBSession), Func(PDBFunc) {
35  // Arguments can appear multiple times if they have live range
36  // information, so we only take the first occurrence.
37  std::unordered_set<std::string> SeenNames;
38  auto DataChildren = Func.findAllChildren<PDBSymbolData>();
39  while (auto Child = DataChildren->getNext()) {
40  if (Child->getDataKind() == PDB_DataKind::Param) {
41  std::string Name = Child->getName();
42  if (SeenNames.find(Name) != SeenNames.end())
43  continue;
44  Args.push_back(std::move(Child));
45  SeenNames.insert(Name);
46  }
47  }
48  reset();
49  }
50 
51  uint32_t getChildCount() const override { return Args.size(); }
52 
53  std::unique_ptr<PDBSymbolData>
54  getChildAtIndex(uint32_t Index) const override {
55  if (Index >= Args.size())
56  return nullptr;
57 
58  return Session.getConcreteSymbolById<PDBSymbolData>(
59  Args[Index]->getSymIndexId());
60  }
61 
62  std::unique_ptr<PDBSymbolData> getNext() override {
63  if (CurIter == Args.end())
64  return nullptr;
65  const auto &Result = **CurIter;
66  ++CurIter;
67  return Session.getConcreteSymbolById<PDBSymbolData>(Result.getSymIndexId());
68  }
69 
70  void reset() override { CurIter = Args.empty() ? Args.end() : Args.begin(); }
71 
72 private:
73  typedef std::vector<std::unique_ptr<PDBSymbolData>> ArgListType;
74  const IPDBSession &Session;
75  const PDBSymbolFunc &Func;
76  ArgListType Args;
77  ArgListType::const_iterator CurIter;
78 };
79 }
80 
81 std::unique_ptr<IPDBEnumChildren<PDBSymbolData>>
83  return llvm::make_unique<FunctionArgEnumerator>(Session, *this);
84 }
85 
86 void PDBSymbolFunc::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
87 
89  std::string Name = getName();
90  if (Name.empty())
91  return false;
92  if (Name[0] == '~')
93  return true;
94  if (Name == "__vecDelDtor")
95  return true;
96  return false;
97 }
98 
99 std::unique_ptr<IPDBEnumLineNumbers> PDBSymbolFunc::getLineNumbers() const {
100  auto Len = RawSymbol->getLength();
101  return Session.findLineNumbersByAddress(RawSymbol->getVirtualAddress(),
102  Len ? Len : 1);
103 }
104 
106  if (auto Lines = getLineNumbers()) {
107  if (auto FirstLine = Lines->getNext()) {
108  return FirstLine->getCompilandId();
109  }
110  }
111  return 0;
112 }
IPDBSession defines an interface used to provide a context for querying debug information from a debu...
Definition: IPDBSession.h:26
This class represents lattice values for constants.
Definition: AllocatorList.h:24
std::unique_ptr< IPDBEnumChildren< PDBSymbolData > > getArguments() const
amdgpu Simplify well known AMD library false Value Value const Twine & Name
static StringRef getName(Value *V)
virtual void dump(const PDBSymbolAnnotation &Symbol)
StringRef getName() const
Return a constant reference to the value&#39;s name.
Definition: Value.cpp:215
FORWARD_CONCRETE_SYMBOL_ID_METHOD_WITH_NAME(PDBSymbolTypeFunctionSig, getType, getSignature) std uint32_t getCompilandId() const
constexpr char Args[]
Key for Kernel::Metadata::mArgs.
void dump(PDBSymDumper &Dumper) const override
Dumps the contents of a symbol a raw_ostream.