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1 //===- PDBSymbolFunc.cpp - --------------------------------------*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"
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11
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12 #include "llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h"
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13 #include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
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14 #include "llvm/DebugInfo/PDB/IPDBSession.h"
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15 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
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16 #include "llvm/DebugInfo/PDB/PDBSymbolData.h"
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17 #include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
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18 #include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
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19 #include "llvm/DebugInfo/PDB/PDBTypes.h"
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20
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21 #include <unordered_set>
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22 #include <utility>
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23 #include <vector>
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24
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25 using namespace llvm;
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26 using namespace llvm::pdb;
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27
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28 namespace {
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29 class FunctionArgEnumerator : public IPDBEnumChildren<PDBSymbolData> {
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30 public:
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31 typedef ConcreteSymbolEnumerator<PDBSymbolData> ArgEnumeratorType;
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32
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33 FunctionArgEnumerator(const IPDBSession &PDBSession,
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34 const PDBSymbolFunc &PDBFunc)
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35 : Session(PDBSession), Func(PDBFunc) {
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36 // Arguments can appear multiple times if they have live range
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37 // information, so we only take the first occurrence.
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38 std::unordered_set<std::string> SeenNames;
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39 auto DataChildren = Func.findAllChildren<PDBSymbolData>();
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40 while (auto Child = DataChildren->getNext()) {
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41 if (Child->getDataKind() == PDB_DataKind::Param) {
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42 std::string Name = Child->getName();
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43 if (SeenNames.find(Name) != SeenNames.end())
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44 continue;
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45 Args.push_back(std::move(Child));
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46 SeenNames.insert(Name);
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47 }
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48 }
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49 reset();
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50 }
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51
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52 uint32_t getChildCount() const override { return Args.size(); }
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53
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54 std::unique_ptr<PDBSymbolData>
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55 getChildAtIndex(uint32_t Index) const override {
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56 if (Index >= Args.size())
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57 return nullptr;
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58
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59 return Session.getConcreteSymbolById<PDBSymbolData>(
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60 Args[Index]->getSymIndexId());
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61 }
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62
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63 std::unique_ptr<PDBSymbolData> getNext() override {
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64 if (CurIter == Args.end())
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65 return nullptr;
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66 const auto &Result = **CurIter;
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67 ++CurIter;
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68 return Session.getConcreteSymbolById<PDBSymbolData>(Result.getSymIndexId());
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69 }
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70
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71 void reset() override { CurIter = Args.empty() ? Args.end() : Args.begin(); }
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72
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73 FunctionArgEnumerator *clone() const override {
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74 return new FunctionArgEnumerator(Session, Func);
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75 }
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76
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77 private:
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78 typedef std::vector<std::unique_ptr<PDBSymbolData>> ArgListType;
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79 const IPDBSession &Session;
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80 const PDBSymbolFunc &Func;
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81 ArgListType Args;
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82 ArgListType::const_iterator CurIter;
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83 };
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84 }
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85
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86 PDBSymbolFunc::PDBSymbolFunc(const IPDBSession &PDBSession,
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87 std::unique_ptr<IPDBRawSymbol> Symbol)
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88 : PDBSymbol(PDBSession, std::move(Symbol)) {
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89 assert(RawSymbol->getSymTag() == PDB_SymType::Function);
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90 }
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91
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92 std::unique_ptr<IPDBEnumChildren<PDBSymbolData>>
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93 PDBSymbolFunc::getArguments() const {
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94 return llvm::make_unique<FunctionArgEnumerator>(Session, *this);
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95 }
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96
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97 void PDBSymbolFunc::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
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98
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99 bool PDBSymbolFunc::isDestructor() const {
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100 std::string Name = getName();
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101 if (Name.empty())
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102 return false;
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103 if (Name[0] == '~')
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104 return true;
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105 if (Name == "__vecDelDtor")
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106 return true;
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107 return false;
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108 }
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