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//===- PDBSymbolFunc.cpp - --------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#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/PDBSymDumper.h"
#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
#include "llvm/DebugInfo/PDB/PDBTypes.h"
#include <unordered_set>
#include <utility>
#include <vector>
using namespace llvm;
using namespace llvm::pdb;
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 override { return Args.size(); }
std::unique_ptr<PDBSymbolData>
getChildAtIndex(uint32_t Index) const override {
if (Index >= Args.size())
return nullptr;
return Session.getConcreteSymbolById<PDBSymbolData>(
Args[Index]->getSymIndexId());
}
std::unique_ptr<PDBSymbolData> getNext() override {
if (CurIter == Args.end())
return nullptr;
const auto &Result = **CurIter;
++CurIter;
return Session.getConcreteSymbolById<PDBSymbolData>(Result.getSymIndexId());
}
void reset() override { CurIter = Args.empty() ? Args.end() : Args.begin(); }
private:
typedef std::vector<std::unique_ptr<PDBSymbolData>> ArgListType;
const IPDBSession &Session;
const PDBSymbolFunc &Func;
ArgListType Args;
ArgListType::const_iterator CurIter;
};
}
std::unique_ptr<IPDBEnumChildren<PDBSymbolData>>
PDBSymbolFunc::getArguments() const {
return std::make_unique<FunctionArgEnumerator>(Session, *this);
}
void PDBSymbolFunc::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
bool PDBSymbolFunc::isDestructor() const {
std::string Name = getName();
if (Name.empty())
return false;
if (Name[0] == '~')
return true;
if (Name == "__vecDelDtor")
return true;
return false;
}
std::unique_ptr<IPDBEnumLineNumbers> PDBSymbolFunc::getLineNumbers() const {
auto Len = RawSymbol->getLength();
return Session.findLineNumbersByAddress(RawSymbol->getVirtualAddress(),
Len ? Len : 1);
}
uint32_t PDBSymbolFunc::getCompilandId() const {
if (auto Lines = getLineNumbers()) {
if (auto FirstLine = Lines->getNext()) {
return FirstLine->getCompilandId();
}
}
return 0;
}
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