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//===- DWARFEmitterImpl.cpp -----------------------------------------------===//
//
// 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 "DWARFEmitterImpl.h"
#include "llvm/DWARFLinker/DWARFLinkerCompileUnit.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCTargetOptions.h"
#include "llvm/MC/MCTargetOptionsCommandFlags.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/FormattedStream.h"
namespace llvm {
namespace dwarflinker_parallel {
Error DwarfEmitterImpl::init(Triple TheTriple,
StringRef Swift5ReflectionSegmentName) {
std::string ErrorStr;
std::string TripleName;
// Get the target.
const Target *TheTarget =
TargetRegistry::lookupTarget(TripleName, TheTriple, ErrorStr);
if (!TheTarget)
return createStringError(std::errc::invalid_argument, ErrorStr.c_str());
TripleName = TheTriple.getTriple();
// Create all the MC Objects.
MRI.reset(TheTarget->createMCRegInfo(TripleName));
if (!MRI)
return createStringError(std::errc::invalid_argument,
"no register info for target %s",
TripleName.c_str());
MCTargetOptions MCOptions = mc::InitMCTargetOptionsFromFlags();
MAI.reset(TheTarget->createMCAsmInfo(*MRI, TripleName, MCOptions));
if (!MAI)
return createStringError(std::errc::invalid_argument,
"no asm info for target %s", TripleName.c_str());
MSTI.reset(TheTarget->createMCSubtargetInfo(TripleName, "", ""));
if (!MSTI)
return createStringError(std::errc::invalid_argument,
"no subtarget info for target %s",
TripleName.c_str());
MC.reset(new MCContext(TheTriple, MAI.get(), MRI.get(), MSTI.get(), nullptr,
nullptr, true, Swift5ReflectionSegmentName));
MOFI.reset(TheTarget->createMCObjectFileInfo(*MC, /*PIC=*/false, false));
MC->setObjectFileInfo(MOFI.get());
MAB = TheTarget->createMCAsmBackend(*MSTI, *MRI, MCOptions);
if (!MAB)
return createStringError(std::errc::invalid_argument,
"no asm backend for target %s",
TripleName.c_str());
MII.reset(TheTarget->createMCInstrInfo());
if (!MII)
return createStringError(std::errc::invalid_argument,
"no instr info info for target %s",
TripleName.c_str());
MCE = TheTarget->createMCCodeEmitter(*MII, *MC);
if (!MCE)
return createStringError(std::errc::invalid_argument,
"no code emitter for target %s",
TripleName.c_str());
switch (OutFileType) {
case DWARFLinker::OutputFileType::Assembly: {
MIP = TheTarget->createMCInstPrinter(TheTriple, MAI->getAssemblerDialect(),
*MAI, *MII, *MRI);
MS = TheTarget->createAsmStreamer(
*MC, std::make_unique<formatted_raw_ostream>(OutFile), true, true, MIP,
std::unique_ptr<MCCodeEmitter>(MCE), std::unique_ptr<MCAsmBackend>(MAB),
true);
break;
}
case DWARFLinker::OutputFileType::Object: {
MS = TheTarget->createMCObjectStreamer(
TheTriple, *MC, std::unique_ptr<MCAsmBackend>(MAB),
MAB->createObjectWriter(OutFile), std::unique_ptr<MCCodeEmitter>(MCE),
*MSTI, MCOptions.MCRelaxAll, MCOptions.MCIncrementalLinkerCompatible,
/*DWARFMustBeAtTheEnd*/ false);
break;
}
}
if (!MS)
return createStringError(std::errc::invalid_argument,
"no object streamer for target %s",
TripleName.c_str());
// Finally create the AsmPrinter we'll use to emit the DIEs.
TM.reset(TheTarget->createTargetMachine(TripleName, "", "", TargetOptions(),
std::nullopt));
if (!TM)
return createStringError(std::errc::invalid_argument,
"no target machine for target %s",
TripleName.c_str());
Asm.reset(TheTarget->createAsmPrinter(*TM, std::unique_ptr<MCStreamer>(MS)));
if (!Asm)
return createStringError(std::errc::invalid_argument,
"no asm printer for target %s",
TripleName.c_str());
Asm->setDwarfUsesRelocationsAcrossSections(false);
RangesSectionSize = 0;
RngListsSectionSize = 0;
LocSectionSize = 0;
LocListsSectionSize = 0;
LineSectionSize = 0;
FrameSectionSize = 0;
DebugInfoSectionSize = 0;
MacInfoSectionSize = 0;
MacroSectionSize = 0;
return Error::success();
}
} // end of namespace dwarflinker_parallel
} // namespace llvm
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