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
10 #include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"
11
12 #include "llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h"
13 #include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
14 #include "llvm/DebugInfo/PDB/IPDBSession.h"
15 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
16 #include "llvm/DebugInfo/PDB/PDBSymbolData.h"
17 #include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
18 #include "llvm/DebugInfo/PDB/PDBTypes.h"
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
FunctionArgEnumerator(const IPDBSession & PDBSession,const PDBSymbolFunc & PDBFunc)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
getChildCount() const51 uint32_t getChildCount() const override { return Args.size(); }
52
53 std::unique_ptr<PDBSymbolData>
getChildAtIndex(uint32_t Index) const54 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
getNext()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
reset()70 void reset() override { CurIter = Args.empty() ? Args.end() : Args.begin(); }
71
clone() const72 FunctionArgEnumerator *clone() const override {
73 return new FunctionArgEnumerator(Session, Func);
74 }
75
76 private:
77 typedef std::vector<std::unique_ptr<PDBSymbolData>> ArgListType;
78 const IPDBSession &Session;
79 const PDBSymbolFunc &Func;
80 ArgListType Args;
81 ArgListType::const_iterator CurIter;
82 };
83 }
84
PDBSymbolFunc(const IPDBSession & PDBSession,std::unique_ptr<IPDBRawSymbol> Symbol)85 PDBSymbolFunc::PDBSymbolFunc(const IPDBSession &PDBSession,
86 std::unique_ptr<IPDBRawSymbol> Symbol)
87 : PDBSymbol(PDBSession, std::move(Symbol)) {
88 assert(RawSymbol->getSymTag() == PDB_SymType::Function);
89 }
90
91 std::unique_ptr<IPDBEnumChildren<PDBSymbolData>>
getArguments() const92 PDBSymbolFunc::getArguments() const {
93 return llvm::make_unique<FunctionArgEnumerator>(Session, *this);
94 }
95
dump(PDBSymDumper & Dumper) const96 void PDBSymbolFunc::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
97
isDestructor() const98 bool PDBSymbolFunc::isDestructor() const {
99 std::string Name = getName();
100 if (Name.empty())
101 return false;
102 if (Name[0] == '~')
103 return true;
104 if (Name == "__vecDelDtor")
105 return true;
106 return false;
107 }
108
getLineNumbers() const109 std::unique_ptr<IPDBEnumLineNumbers> PDBSymbolFunc::getLineNumbers() const {
110 auto Len = RawSymbol->getLength();
111 return Session.findLineNumbersByAddress(RawSymbol->getVirtualAddress(),
112 Len ? Len : 1);
113 }
114
getCompilandId() const115 uint32_t PDBSymbolFunc::getCompilandId() const {
116 if (auto Lines = getLineNumbers()) {
117 if (auto FirstLine = Lines->getNext()) {
118 return FirstLine->getCompilandId();
119 }
120 }
121 return 0;
122 }
123