aboutsummaryrefslogtreecommitdiffstats
path: root/lib/DebugInfo/PDB/PDBSymbolFunc.cpp
blob: e2d859f94a8f10e0d1d39c6231172d074ec0ef1c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
//===- PDBSymbolFunc.cpp - --------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"

#include "llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h"
#include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
#include "llvm/DebugInfo/PDB/IPDBSession.h"
#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
#include "llvm/DebugInfo/PDB/PDBSymDumper.h"
#include "llvm/DebugInfo/PDB/PDBTypes.h"

#include <unordered_set>
#include <utility>
#include <vector>

using namespace llvm;

namespace {
class FunctionArgEnumerator : public IPDBEnumChildren<PDBSymbolData> {
public:
  typedef ConcreteSymbolEnumerator<PDBSymbolData> ArgEnumeratorType;

  FunctionArgEnumerator(const IPDBSession &PDBSession,
                        const PDBSymbolFunc &PDBFunc)
      : Session(PDBSession), Func(PDBFunc) {
    // Arguments can appear multiple times if they have live range
    // information, so we only take the first occurrence.
    std::unordered_set<std::string> SeenNames;
    auto DataChildren = Func.findAllChildren<PDBSymbolData>();
    while (auto Child = DataChildren->getNext()) {
      if (Child->getDataKind() == PDB_DataKind::Param) {
        std::string Name = Child->getName();
        if (SeenNames.find(Name) != SeenNames.end())
          continue;
        Args.push_back(std::move(Child));
        SeenNames.insert(Name);
      }
    }
    reset();
  }

  uint32_t getChildCount() const { return Args.size(); }

  std::unique_ptr<PDBSymbolData> getChildAtIndex(uint32_t Index) const {
    if (Index >= Args.size())
      return nullptr;

    return Session.getConcreteSymbolById<PDBSymbolData>(
        Args[Index]->getSymIndexId());
  }

  std::unique_ptr<PDBSymbolData> getNext() {
    if (CurIter == Args.end())
      return nullptr;
    const auto &Result = **CurIter;
    ++CurIter;
    return Session.getConcreteSymbolById<PDBSymbolData>(Result.getSymIndexId());
  }

  void reset() { CurIter = Args.empty() ? Args.end() : Args.begin(); }

  FunctionArgEnumerator *clone() const {
    return new FunctionArgEnumerator(Session, Func);
  }

private:
  typedef std::vector<std::unique_ptr<PDBSymbolData>> ArgListType;
  const IPDBSession &Session;
  const PDBSymbolFunc &Func;
  ArgListType Args;
  ArgListType::const_iterator CurIter;
};
}

PDBSymbolFunc::PDBSymbolFunc(const IPDBSession &PDBSession,
                             std::unique_ptr<IPDBRawSymbol> Symbol)
    : PDBSymbol(PDBSession, std::move(Symbol)) {}

std::unique_ptr<PDBSymbolTypeFunctionSig> PDBSymbolFunc::getSignature() const {
  return Session.getConcreteSymbolById<PDBSymbolTypeFunctionSig>(getTypeId());
}

std::unique_ptr<IPDBEnumChildren<PDBSymbolData>>
PDBSymbolFunc::getArguments() const {
  return llvm::make_unique<FunctionArgEnumerator>(Session, *this);
}

std::unique_ptr<PDBSymbolTypeUDT> PDBSymbolFunc::getClassParent() const {
  return Session.getConcreteSymbolById<PDBSymbolTypeUDT>(getClassParentId());
}

void PDBSymbolFunc::dump(raw_ostream &OS, int Indent,
                         PDBSymDumper &Dumper) const {
  Dumper.dump(*this, OS, Indent);
}