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//===- 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(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
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