lib/DebugInfo/PDB/PDBSymbolFunc.cpp

   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
  25 using namespace llvm;
  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 { return Args.size(); }
  52
  53   std::unique_ptr<PDBSymbolData> getChildAtIndex(uint32_t Index) const {
  54     if (Index >= Args.size())
  55       return nullptr;
  56
  57     return Session.getConcreteSymbolById<PDBSymbolData>(
  58         Args[Index]->getSymIndexId());
  59   }
  60
  61   std::unique_ptr<PDBSymbolData> getNext() {
  62     if (CurIter == Args.end())
  63       return nullptr;
  64     const auto &Result = **CurIter;
  65     ++CurIter;
  66     return Session.getConcreteSymbolById<PDBSymbolData>(Result.getSymIndexId());
  67   }
  68
  69   void reset() { CurIter = Args.empty() ? Args.end() : Args.begin(); }
  70
  71   FunctionArgEnumerator *clone() const {
  72     return new FunctionArgEnumerator(Session, Func);
  73   }
  74
  75 private:
  76   typedef std::vector<std::unique_ptr<PDBSymbolData>> ArgListType;
  77   const IPDBSession &Session;
  78   const PDBSymbolFunc &Func;
  79   ArgListType Args;
  80   ArgListType::const_iterator CurIter;
  81 };
  82 }
  83
  84 PDBSymbolFunc::PDBSymbolFunc(const IPDBSession &PDBSession,
  85                              std::unique_ptr<IPDBRawSymbol> Symbol)
  86     : PDBSymbol(PDBSession, std::move(Symbol)) {}
  87
  88 std::unique_ptr<PDBSymbolTypeFunctionSig> PDBSymbolFunc::getSignature() const {
  89   return Session.getConcreteSymbolById<PDBSymbolTypeFunctionSig>(getTypeId());
  90 }
  91
  92 std::unique_ptr<IPDBEnumChildren<PDBSymbolData>>
  93 PDBSymbolFunc::getArguments() const {
  94   return llvm::make_unique<FunctionArgEnumerator>(Session, *this);
  95 }
  96
  97 std::unique_ptr<PDBSymbolTypeUDT> PDBSymbolFunc::getClassParent() const {
  98   return Session.getConcreteSymbolById<PDBSymbolTypeUDT>(getClassParentId());
  99 }
 100
 101 void PDBSymbolFunc::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }