| 1 | //===- PDBSymbolTypeFunctionSig.cpp - --------------------------*- C++ -*-===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h" |
| 10 | |
| 11 | #include "llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h" |
| 12 | #include "llvm/DebugInfo/PDB/IPDBEnumChildren.h" |
| 13 | #include "llvm/DebugInfo/PDB/IPDBSession.h" |
| 14 | #include "llvm/DebugInfo/PDB/PDBSymDumper.h" |
| 15 | #include "llvm/DebugInfo/PDB/PDBSymbol.h" |
| 16 | #include "llvm/DebugInfo/PDB/PDBSymbolTypeBuiltin.h" |
| 17 | #include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionArg.h" |
| 18 | |
| 19 | #include <utility> |
| 20 | |
| 21 | using namespace llvm; |
| 22 | using namespace llvm::pdb; |
| 23 | |
| 24 | namespace { |
| 25 | class FunctionArgEnumerator : public IPDBEnumSymbols { |
| 26 | public: |
| 27 | typedef ConcreteSymbolEnumerator<PDBSymbolTypeFunctionArg> ArgEnumeratorType; |
| 28 | |
| 29 | FunctionArgEnumerator(const IPDBSession &PDBSession, |
| 30 | const PDBSymbolTypeFunctionSig &Sig) |
| 31 | : Session(PDBSession), |
| 32 | Enumerator(Sig.findAllChildren<PDBSymbolTypeFunctionArg>()) {} |
| 33 | |
| 34 | FunctionArgEnumerator(const IPDBSession &PDBSession, |
| 35 | std::unique_ptr<ArgEnumeratorType> ArgEnumerator) |
| 36 | : Session(PDBSession), Enumerator(std::move(ArgEnumerator)) {} |
| 37 | |
| 38 | uint32_t getChildCount() const override { |
| 39 | return Enumerator->getChildCount(); |
| 40 | } |
| 41 | |
| 42 | std::unique_ptr<PDBSymbol> getChildAtIndex(uint32_t Index) const override { |
| 43 | auto FunctionArgSymbol = Enumerator->getChildAtIndex(Index); |
| 44 | if (!FunctionArgSymbol) |
| 45 | return nullptr; |
| 46 | return Session.getSymbolById(SymbolId: FunctionArgSymbol->getTypeId()); |
| 47 | } |
| 48 | |
| 49 | std::unique_ptr<PDBSymbol> getNext() override { |
| 50 | auto FunctionArgSymbol = Enumerator->getNext(); |
| 51 | if (!FunctionArgSymbol) |
| 52 | return nullptr; |
| 53 | return Session.getSymbolById(SymbolId: FunctionArgSymbol->getTypeId()); |
| 54 | } |
| 55 | |
| 56 | void reset() override { Enumerator->reset(); } |
| 57 | |
| 58 | private: |
| 59 | const IPDBSession &Session; |
| 60 | std::unique_ptr<ArgEnumeratorType> Enumerator; |
| 61 | }; |
| 62 | } |
| 63 | |
| 64 | std::unique_ptr<IPDBEnumSymbols> |
| 65 | PDBSymbolTypeFunctionSig::getArguments() const { |
| 66 | return std::make_unique<FunctionArgEnumerator>(args: Session, args: *this); |
| 67 | } |
| 68 | |
| 69 | void PDBSymbolTypeFunctionSig::dump(PDBSymDumper &Dumper) const { |
| 70 | Dumper.dump(Symbol: *this); |
| 71 | } |
| 72 | |
| 73 | void PDBSymbolTypeFunctionSig::dumpRight(PDBSymDumper &Dumper) const { |
| 74 | Dumper.dumpRight(Symbol: *this); |
| 75 | } |
| 76 | |
| 77 | bool PDBSymbolTypeFunctionSig::isCVarArgs() const { |
| 78 | auto SigArguments = getArguments(); |
| 79 | if (!SigArguments) |
| 80 | return false; |
| 81 | uint32_t NumArgs = SigArguments->getChildCount(); |
| 82 | if (NumArgs == 0) |
| 83 | return false; |
| 84 | auto Last = SigArguments->getChildAtIndex(Index: NumArgs - 1); |
| 85 | if (auto Builtin = llvm::dyn_cast_or_null<PDBSymbolTypeBuiltin>(Val: Last.get())) { |
| 86 | if (Builtin->getBuiltinType() == PDB_BuiltinType::None) |
| 87 | return true; |
| 88 | } |
| 89 | |
| 90 | // Note that for a variadic template signature, this method always returns |
| 91 | // false since the parameters of the template are specialized. |
| 92 | return false; |
| 93 | } |
| 94 |