PDBSymbolFunc.cpp revision 283631 
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/PDBSymbolData.h"
16#include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
17#include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
18#include "llvm/DebugInfo/PDB/PDBSymDumper.h"
19#include "llvm/DebugInfo/PDB/PDBTypes.h"
20
21#include <unordered_set>
22#include <utility>
23#include <vector>
24
25using namespace llvm;
26
27namespace {
28class FunctionArgEnumerator : public IPDBEnumChildren<PDBSymbolData> {
29public:
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  FunctionArgEnumerator *clone() const override {
73    return new FunctionArgEnumerator(Session, Func);
74  }
75
76private:
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
85PDBSymbolFunc::PDBSymbolFunc(const IPDBSession &PDBSession,
86                             std::unique_ptr<IPDBRawSymbol> Symbol)
87    : PDBSymbol(PDBSession, std::move(Symbol)) {}
88
89std::unique_ptr<PDBSymbolTypeFunctionSig> PDBSymbolFunc::getSignature() const {
90  return Session.getConcreteSymbolById<PDBSymbolTypeFunctionSig>(getTypeId());
91}
92
93std::unique_ptr<IPDBEnumChildren<PDBSymbolData>>
94PDBSymbolFunc::getArguments() const {
95  return llvm::make_unique<FunctionArgEnumerator>(Session, *this);
96}
97
98std::unique_ptr<PDBSymbolTypeUDT> PDBSymbolFunc::getClassParent() const {
99  return Session.getConcreteSymbolById<PDBSymbolTypeUDT>(getClassParentId());
100}
101
102void PDBSymbolFunc::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
103