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//===- PDBSymbolTypeFunctionSig.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/PDBSymbolTypeFunctionSig.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/PDBSymbol.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeBuiltin.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionArg.h"
#include <utility>
using namespace llvm;
using namespace llvm::pdb;
namespace {
class FunctionArgEnumerator : public IPDBEnumSymbols {
public:
typedef ConcreteSymbolEnumerator<PDBSymbolTypeFunctionArg> ArgEnumeratorType;
FunctionArgEnumerator(const IPDBSession &PDBSession,
const PDBSymbolTypeFunctionSig &Sig)
: Session(PDBSession),
Enumerator(Sig.findAllChildren<PDBSymbolTypeFunctionArg>()) {}
FunctionArgEnumerator(const IPDBSession &PDBSession,
std::unique_ptr<ArgEnumeratorType> ArgEnumerator)
: Session(PDBSession), Enumerator(std::move(ArgEnumerator)) {}
uint32_t getChildCount() const override {
return Enumerator->getChildCount();
}
std::unique_ptr<PDBSymbol> getChildAtIndex(uint32_t Index) const override {
auto FunctionArgSymbol = Enumerator->getChildAtIndex(Index);
if (!FunctionArgSymbol)
return nullptr;
return Session.getSymbolById(FunctionArgSymbol->getTypeId());
}
std::unique_ptr<PDBSymbol> getNext() override {
auto FunctionArgSymbol = Enumerator->getNext();
if (!FunctionArgSymbol)
return nullptr;
return Session.getSymbolById(FunctionArgSymbol->getTypeId());
}
void reset() override { Enumerator->reset(); }
private:
const IPDBSession &Session;
std::unique_ptr<ArgEnumeratorType> Enumerator;
};
}
std::unique_ptr<IPDBEnumSymbols>
PDBSymbolTypeFunctionSig::getArguments() const {
return std::make_unique<FunctionArgEnumerator>(Session, *this);
}
void PDBSymbolTypeFunctionSig::dump(PDBSymDumper &Dumper) const {
Dumper.dump(*this);
}
void PDBSymbolTypeFunctionSig::dumpRight(PDBSymDumper &Dumper) const {
Dumper.dumpRight(*this);
}
bool PDBSymbolTypeFunctionSig::isCVarArgs() const {
auto SigArguments = getArguments();
if (!SigArguments)
return false;
uint32_t NumArgs = SigArguments->getChildCount();
if (NumArgs == 0)
return false;
auto Last = SigArguments->getChildAtIndex(NumArgs - 1);
if (auto Builtin = llvm::dyn_cast_or_null<PDBSymbolTypeBuiltin>(Last.get())) {
if (Builtin->getBuiltinType() == PDB_BuiltinType::None)
return true;
}
// Note that for a variadic template signature, this method always returns
// false since the parameters of the template are specialized.
return false;
}
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