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//===- DwarfEmitterImpl.h ---------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_DWARFLINKER_PARALLEL_DWARFEMITTERIMPL_H
#define LLVM_LIB_DWARFLINKER_PARALLEL_DWARFEMITTERIMPL_H
#include "DWARFLinkerCompileUnit.h"
#include "llvm/BinaryFormat/Swift.h"
#include "llvm/CodeGen/AccelTable.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/DWARFLinker/Parallel/DWARFLinker.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Target/TargetMachine.h"
namespace llvm {
/// User of DwarfEmitterImpl should call initialization code
/// for AsmPrinter:
///
/// InitializeAllTargetInfos();
/// InitializeAllTargetMCs();
/// InitializeAllTargets();
/// InitializeAllAsmPrinters();
template <typename DataT> class AccelTable;
class MCCodeEmitter;
namespace dwarf_linker {
namespace parallel {
using DebugNamesUnitsOffsets = std::vector<std::variant<MCSymbol *, uint64_t>>;
using CompUnitIDToIdx = DenseMap<unsigned, unsigned>;
/// This class emits DWARF data to the output stream. It emits already
/// generated section data and specific data, which could not be generated
/// by CompileUnit.
class DwarfEmitterImpl {
public:
DwarfEmitterImpl(DWARFLinker::OutputFileType OutFileType,
raw_pwrite_stream &OutFile)
: OutFile(OutFile), OutFileType(OutFileType) {}
/// Initialize AsmPrinter data.
Error init(Triple TheTriple, StringRef Swift5ReflectionSegmentName);
/// Returns triple of output stream.
const Triple &getTargetTriple() { return MC->getTargetTriple(); }
/// Dump the file to the disk.
void finish() { MS->finish(); }
/// Emit abbreviations.
void emitAbbrevs(const SmallVector<std::unique_ptr<DIEAbbrev>> &Abbrevs,
unsigned DwarfVersion);
/// Emit compile unit header.
void emitCompileUnitHeader(DwarfUnit &Unit);
/// Emit DIE recursively.
void emitDIE(DIE &Die);
/// Returns size of generated .debug_info section.
uint64_t getDebugInfoSectionSize() const { return DebugInfoSectionSize; }
/// Emits .debug_names section according to the specified \p Table.
void emitDebugNames(DWARF5AccelTable &Table,
DebugNamesUnitsOffsets &CUOffsets,
CompUnitIDToIdx &UnitIDToIdxMap);
/// Emits .apple_names section according to the specified \p Table.
void emitAppleNames(AccelTable<AppleAccelTableStaticOffsetData> &Table);
/// Emits .apple_namespaces section according to the specified \p Table.
void emitAppleNamespaces(AccelTable<AppleAccelTableStaticOffsetData> &Table);
/// Emits .apple_objc section according to the specified \p Table.
void emitAppleObjc(AccelTable<AppleAccelTableStaticOffsetData> &Table);
/// Emits .apple_types section according to the specified \p Table.
void emitAppleTypes(AccelTable<AppleAccelTableStaticTypeData> &Table);
private:
// Enumerate all string patches and write them into the destination section.
// Order of patches is the same as in original input file. To avoid emitting
// the same string twice we accumulate NextOffset value. Thus if string
// offset smaller than NextOffset value then the patch is skipped (as that
// string was emitted earlier).
template <typename PatchTy>
void emitStringsImpl(ArrayList<PatchTy> &StringPatches,
const StringEntryToDwarfStringPoolEntryMap &Strings,
uint64_t &NextOffset, MCSection *OutSection);
/// \defgroup MCObjects MC layer objects constructed by the streamer
/// @{
std::unique_ptr<MCRegisterInfo> MRI;
std::unique_ptr<MCAsmInfo> MAI;
std::unique_ptr<MCObjectFileInfo> MOFI;
std::unique_ptr<MCContext> MC;
MCAsmBackend *MAB; // Owned by MCStreamer
std::unique_ptr<MCInstrInfo> MII;
std::unique_ptr<MCSubtargetInfo> MSTI;
std::unique_ptr<MCInstPrinter> MIP; // Owned by AsmPrinter
MCCodeEmitter *MCE; // Owned by MCStreamer
MCStreamer *MS; // Owned by AsmPrinter
std::unique_ptr<TargetMachine> TM;
std::unique_ptr<AsmPrinter> Asm;
/// @}
/// The output file we stream the linked Dwarf to.
raw_pwrite_stream &OutFile;
DWARFLinkerBase::OutputFileType OutFileType =
DWARFLinkerBase::OutputFileType::Object;
uint64_t DebugInfoSectionSize = 0;
};
} // end of namespace parallel
} // end of namespace dwarf_linker
} // end of namespace llvm
#endif // LLVM_LIB_DWARFLINKER_PARALLEL_DWARFEMITTERIMPL_H
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