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llvm-project/llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp
Chandler Carruth dd647e3e60
Rework the Option library to reduce dynamic relocations (#119198) 
Apologies for the large change, I looked for ways to break this up and
all of the ones I saw added real complexity. This change focuses on the
option's prefixed names and the array of prefixes. These are present in
every option and the dominant source of dynamic relocations for PIE or
PIC users of LLVM and Clang tooling. In some cases, 100s or 1000s of
them for the Clang driver which has a huge number of options.

This PR addresses this by building a string table and a prefixes table
that can be referenced with indices rather than pointers that require
dynamic relocations. This removes almost 7k dynmaic relocations from the
`clang` binary, roughly 8% of the remaining dynmaic relocations outside
of vtables. For busy-boxing use cases where many different option tables
are linked into the same binary, the savings add up a bit more.

The string table is a straightforward mechanism, but the prefixes
required some subtlety. They are encoded in a Pascal-string fashion with
a size followed by a sequence of offsets. This works relatively well for
the small realistic prefixes arrays in use.

Lots of code has to change in order to land this though: both all the
option library code has to be updated to use the string table and
prefixes table, and all the users of the options library have to be
updated to correctly instantiate the objects.

Some follow-up patches in the works to provide an abstraction for this
style of code, and to start using the same technique for some of the
other strings here now that the infrastructure is in place.
2024-12-11 15:44:44 -08:00

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//===-- llvm-libtool-darwin.cpp - a tool for creating libraries -----------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// A utility for creating static and dynamic libraries for Darwin.
//
//===----------------------------------------------------------------------===//
#include "DependencyInfo.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/BinaryFormat/Magic.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Object/ArchiveWriter.h"
#include "llvm/Object/IRObjectFile.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/MachOUniversal.h"
#include "llvm/Object/MachOUniversalWriter.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/LLVMDriver.h"
#include "llvm/Support/LineIterator.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/YAMLTraits.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TextAPI/Architecture.h"
#include <cstdlib>
#include <map>
#include <type_traits>
using namespace llvm;
using namespace llvm::object;
using namespace llvm::opt;
// Command-line option boilerplate.
namespace {
enum ID {
OPT_INVALID = 0, // This is not an option ID.
#define OPTION(...) LLVM_MAKE_OPT_ID(__VA_ARGS__),
#include "Opts.inc"
#undef OPTION
};
#define OPTTABLE_STR_TABLE_CODE
#include "Opts.inc"
#undef OPTTABLE_STR_TABLE_CODE
#define OPTTABLE_PREFIXES_TABLE_CODE
#include "Opts.inc"
#undef OPTTABLE_PREFIXES_TABLE_CODE
static constexpr opt::OptTable::Info InfoTable[] = {
#define OPTION(...) LLVM_CONSTRUCT_OPT_INFO(__VA_ARGS__),
#include "Opts.inc"
#undef OPTION
};
class LibtoolDarwinOptTable : public opt::GenericOptTable {
public:
LibtoolDarwinOptTable()
: GenericOptTable(OptionStrTable, OptionPrefixesTable, InfoTable) {}
};
} // end anonymous namespace
class NewArchiveMemberList;
typedef std::map<uint64_t, NewArchiveMemberList> MembersPerArchitectureMap;
static std::string OutputFile;
static std::vector<std::string> InputFiles;
static std::optional<std::string> ArchType;
enum class Operation { None, Static };
static Operation LibraryOperation = Operation::None;
static bool DeterministicOption;
static bool NonDeterministicOption;
static std::string FileList;
static std::vector<std::string> Libraries;
static std::vector<std::string> LibrarySearchDirs;
static std::string DependencyInfoPath;
static bool VersionOption;
static bool NoWarningForNoSymbols;
static bool WarningsAsErrors;
static std::string IgnoredSyslibRoot;
static const std::array<std::string, 3> StandardSearchDirs{
"/lib",
"/usr/lib",
"/usr/local/lib",
};
std::unique_ptr<DependencyInfo> GlobalDependencyInfo;
struct Config {
bool Deterministic = true; // Updated by 'D' and 'U' modifiers.
uint32_t ArchCPUType;
uint32_t ArchCPUSubtype;
};
static Expected<std::string> searchForFile(const Twine &FileName) {
auto FindLib =
[FileName](
ArrayRef<std::string> SearchDirs) -> std::optional<std::string> {
for (StringRef Dir : SearchDirs) {
SmallString<128> Path;
sys::path::append(Path, Dir, FileName);
if (sys::fs::exists(Path))
return std::string(Path);
GlobalDependencyInfo->addMissingInput(Path);
}
return std::nullopt;
};
std::optional<std::string> Found = FindLib(LibrarySearchDirs);
if (!Found)
Found = FindLib(StandardSearchDirs);
if (Found)
return *Found;
return createStringError(std::errc::invalid_argument,
"cannot locate file '%s'", FileName.str().c_str());
}
static Error processCommandLineLibraries() {
for (StringRef BaseName : Libraries) {
Expected<std::string> FullPath = searchForFile(
BaseName.ends_with(".o") ? BaseName.str() : "lib" + BaseName + ".a");
if (!FullPath)
return FullPath.takeError();
InputFiles.push_back(FullPath.get());
}
return Error::success();
}
static Error processFileList() {
StringRef FileName, DirName;
std::tie(FileName, DirName) = StringRef(FileList).rsplit(",");
ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
MemoryBuffer::getFileOrSTDIN(FileName, /*IsText=*/false,
/*RequiresNullTerminator=*/false);
if (std::error_code EC = FileOrErr.getError())
return createFileError(FileName, errorCodeToError(EC));
const MemoryBuffer &Ref = *FileOrErr.get();
line_iterator I(Ref, /*SkipBlanks=*/false);
if (I.is_at_eof())
return createStringError(std::errc::invalid_argument,
"file list file: '%s' is empty",
FileName.str().c_str());
for (; !I.is_at_eof(); ++I) {
StringRef Line = *I;
if (Line.empty())
return createStringError(std::errc::invalid_argument,
"file list file: '%s': filename cannot be empty",
FileName.str().c_str());
SmallString<128> Path;
if (!DirName.empty())
sys::path::append(Path, DirName, Line);
else
sys::path::append(Path, Line);
InputFiles.push_back(static_cast<std::string>(Path));
}
return Error::success();
}
static Error validateArchitectureName(StringRef ArchitectureName) {
if (!MachOObjectFile::isValidArch(ArchitectureName)) {
std::string Buf;
raw_string_ostream OS(Buf);
for (StringRef Arch : MachOObjectFile::getValidArchs())
OS << Arch << " ";
return createStringError(
std::errc::invalid_argument,
"invalid architecture '%s': valid architecture names are %s",
ArchitectureName.str().c_str(), Buf.c_str());
}
return Error::success();
}
static uint64_t getCPUID(uint32_t CPUType, uint32_t CPUSubtype) {
switch (CPUType) {
case MachO::CPU_TYPE_ARM:
case MachO::CPU_TYPE_ARM64:
case MachO::CPU_TYPE_ARM64_32:
case MachO::CPU_TYPE_X86_64:
// We consider CPUSubtype only for the above 4 CPUTypes to match cctools'
// libtool behavior.
return static_cast<uint64_t>(CPUType) << 32 | CPUSubtype;
default:
return CPUType;
}
}
// MembersData is an organized collection of members.
struct MembersData {
// MembersPerArchitectureMap is a mapping from CPU architecture to a list of
// members.
MembersPerArchitectureMap MembersPerArchitecture;
std::vector<std::unique_ptr<MemoryBuffer>> FileBuffers;
};
// NewArchiveMemberList instances serve as collections of archive members and
// information about those members.
class NewArchiveMemberList {
std::vector<NewArchiveMember> Members;
// This vector contains the file that each NewArchiveMember from Members came
// from. Therefore, it has the same size as Members.
std::vector<StringRef> Files;
public:
// Add a NewArchiveMember and the file it came from to the list.
void push_back(NewArchiveMember &&Member, StringRef File) {
Members.push_back(std::move(Member));
Files.push_back(File);
}
ArrayRef<NewArchiveMember> getMembers() const { return Members; }
ArrayRef<StringRef> getFiles() const { return Files; }
static_assert(
std::is_same<decltype(MembersData::MembersPerArchitecture)::mapped_type,
NewArchiveMemberList>(),
"This test makes sure NewArchiveMemberList is used by MembersData since "
"the following asserts test invariants required for MembersData.");
static_assert(
!std::is_copy_constructible_v<
decltype(NewArchiveMemberList::Members)::value_type>,
"MembersData::MembersPerArchitecture has a dependency on "
"MembersData::FileBuffers so it should not be able to "
"be copied on its own without FileBuffers. Unfortunately, "
"is_copy_constructible does not detect whether the container (ie vector) "
"of a non-copyable type is itself non-copyable so we have to test the "
"actual type of the stored data (ie, value_type).");
static_assert(
!std::is_copy_assignable_v<
decltype(NewArchiveMemberList::Members)::value_type>,
"MembersData::MembersPerArchitecture has a dependency on "
"MembersData::FileBuffers so it should not be able to "
"be copied on its own without FileBuffers. Unfortunately, "
"is_copy_constructible does not detect whether the container (ie vector) "
"of a non-copyable type is itself non-copyable so we have to test the "
"actual type of the stored data (ie, value_type).");
};
// MembersBuilder collects and organizes all members from the files provided by
// the user.
class MembersBuilder {
public:
MembersBuilder(LLVMContext &LLVMCtx, const Config &C)
: LLVMCtx(LLVMCtx), C(C) {}
Expected<MembersData> build() {
for (StringRef FileName : InputFiles)
if (Error E = AddMember(*this, FileName)())
return std::move(E);
std::string Arch = ArchType.value_or("");
if (!Arch.empty()) {
uint64_t ArchCPUID = getCPUID(C.ArchCPUType, C.ArchCPUSubtype);
if (Data.MembersPerArchitecture.find(ArchCPUID) ==
Data.MembersPerArchitecture.end())
return createStringError(std::errc::invalid_argument,
"no library created (no object files in input "
"files matching -arch_only %s)",
Arch.c_str());
}
return std::move(Data);
}
private:
class AddMember {
MembersBuilder &Builder;
StringRef FileName;
public:
AddMember(MembersBuilder &Builder, StringRef FileName)
: Builder(Builder), FileName(FileName) {}
Error operator()() {
Expected<NewArchiveMember> NewMemberOrErr =
NewArchiveMember::getFile(FileName, Builder.C.Deterministic);
if (!NewMemberOrErr)
return createFileError(FileName, NewMemberOrErr.takeError());
auto &NewMember = *NewMemberOrErr;
// For regular archives, use the basename of the object path for the
// member name.
NewMember.MemberName = sys::path::filename(NewMember.MemberName);
file_magic Magic = identify_magic(NewMember.Buf->getBuffer());
// Flatten archives.
if (Magic == file_magic::archive)
return addArchiveMembers(std::move(NewMember));
// Flatten universal files.
if (Magic == file_magic::macho_universal_binary)
return addUniversalMembers(std::move(NewMember));
// Bitcode files.
if (Magic == file_magic::bitcode)
return verifyAndAddIRObject(std::move(NewMember));
return verifyAndAddMachOObject(std::move(NewMember));
}
private:
// Check that a file's architecture [FileCPUType, FileCPUSubtype]
// matches the architecture specified under -arch_only flag.
bool acceptFileArch(uint32_t FileCPUType, uint32_t FileCPUSubtype) {
if (Builder.C.ArchCPUType != FileCPUType)
return false;
switch (Builder.C.ArchCPUType) {
case MachO::CPU_TYPE_ARM:
case MachO::CPU_TYPE_ARM64_32:
case MachO::CPU_TYPE_X86_64:
return Builder.C.ArchCPUSubtype == FileCPUSubtype;
case MachO::CPU_TYPE_ARM64:
if (Builder.C.ArchCPUSubtype == MachO::CPU_SUBTYPE_ARM64_ALL)
return FileCPUSubtype == MachO::CPU_SUBTYPE_ARM64_ALL ||
FileCPUSubtype == MachO::CPU_SUBTYPE_ARM64_V8;
else
return Builder.C.ArchCPUSubtype == FileCPUSubtype;
default:
return true;
}
}
Error verifyAndAddMachOObject(NewArchiveMember Member) {
auto MBRef = Member.Buf->getMemBufferRef();
Expected<std::unique_ptr<object::ObjectFile>> ObjOrErr =
object::ObjectFile::createObjectFile(MBRef);
// Throw error if not a valid object file.
if (!ObjOrErr)
return createFileError(Member.MemberName, ObjOrErr.takeError());
// Throw error if not in Mach-O format.
if (!isa<object::MachOObjectFile>(**ObjOrErr))
return createStringError(std::errc::invalid_argument,
"'%s': format not supported",
Member.MemberName.data());
auto *O = cast<MachOObjectFile>(ObjOrErr->get());
uint32_t FileCPUType, FileCPUSubtype;
std::tie(FileCPUType, FileCPUSubtype) = MachO::getCPUTypeFromArchitecture(
MachO::getArchitectureFromName(O->getArchTriple().getArchName()));
// If -arch_only is specified then skip this file if it doesn't match
// the architecture specified.
if (ArchType && !acceptFileArch(FileCPUType, FileCPUSubtype)) {
return Error::success();
}
if (!NoWarningForNoSymbols && O->symbols().empty()) {
Error E = createFileError(
Member.MemberName,
createStringError(std::errc::invalid_argument,
"has no symbols for architecture %s",
O->getArchTriple().getArchName().str().c_str()));
if (WarningsAsErrors)
return E;
WithColor::defaultWarningHandler(std::move(E));
}
uint64_t FileCPUID = getCPUID(FileCPUType, FileCPUSubtype);
Builder.Data.MembersPerArchitecture[FileCPUID].push_back(
std::move(Member), FileName);
return Error::success();
}
Error verifyAndAddIRObject(NewArchiveMember Member) {
auto MBRef = Member.Buf->getMemBufferRef();
Expected<std::unique_ptr<object::IRObjectFile>> IROrErr =
object::IRObjectFile::create(MBRef, Builder.LLVMCtx);
// Throw error if not a valid IR object file.
if (!IROrErr)
return createFileError(Member.MemberName, IROrErr.takeError());
Triple TT = Triple(IROrErr->get()->getTargetTriple());
Expected<uint32_t> FileCPUTypeOrErr = MachO::getCPUType(TT);
if (!FileCPUTypeOrErr)
return FileCPUTypeOrErr.takeError();
Expected<uint32_t> FileCPUSubTypeOrErr = MachO::getCPUSubType(TT);
if (!FileCPUSubTypeOrErr)
return FileCPUSubTypeOrErr.takeError();
// If -arch_only is specified then skip this file if it doesn't match
// the architecture specified.
if (ArchType &&
!acceptFileArch(*FileCPUTypeOrErr, *FileCPUSubTypeOrErr)) {
return Error::success();
}
uint64_t FileCPUID = getCPUID(*FileCPUTypeOrErr, *FileCPUSubTypeOrErr);
Builder.Data.MembersPerArchitecture[FileCPUID].push_back(
std::move(Member), FileName);
return Error::success();
}
Error addChildMember(const object::Archive::Child &M) {
Expected<NewArchiveMember> NewMemberOrErr =
NewArchiveMember::getOldMember(M, Builder.C.Deterministic);
if (!NewMemberOrErr)
return NewMemberOrErr.takeError();
auto &NewMember = *NewMemberOrErr;
file_magic Magic = identify_magic(NewMember.Buf->getBuffer());
if (Magic == file_magic::bitcode)
return verifyAndAddIRObject(std::move(NewMember));
return verifyAndAddMachOObject(std::move(NewMember));
}
Error processArchive(object::Archive &Lib) {
Error Err = Error::success();
for (const object::Archive::Child &Child : Lib.children(Err))
if (Error E = addChildMember(Child))
return createFileError(FileName, std::move(E));
if (Err)
return createFileError(FileName, std::move(Err));
return Error::success();
}
Error addArchiveMembers(NewArchiveMember NewMember) {
Expected<std::unique_ptr<Archive>> LibOrErr =
object::Archive::create(NewMember.Buf->getMemBufferRef());
if (!LibOrErr)
return createFileError(FileName, LibOrErr.takeError());
if (Error E = processArchive(**LibOrErr))
return E;
// Update vector FileBuffers with the MemoryBuffers to transfer
// ownership.
Builder.Data.FileBuffers.push_back(std::move(NewMember.Buf));
return Error::success();
}
Error addUniversalMembers(NewArchiveMember NewMember) {
Expected<std::unique_ptr<MachOUniversalBinary>> BinaryOrErr =
MachOUniversalBinary::create(NewMember.Buf->getMemBufferRef());
if (!BinaryOrErr)
return createFileError(FileName, BinaryOrErr.takeError());
auto *UO = BinaryOrErr->get();
for (const MachOUniversalBinary::ObjectForArch &O : UO->objects()) {
Expected<std::unique_ptr<MachOObjectFile>> MachOObjOrErr =
O.getAsObjectFile();
if (MachOObjOrErr) {
NewArchiveMember NewMember =
NewArchiveMember(MachOObjOrErr->get()->getMemoryBufferRef());
NewMember.MemberName = sys::path::filename(NewMember.MemberName);
if (Error E = verifyAndAddMachOObject(std::move(NewMember)))
return E;
continue;
}
Expected<std::unique_ptr<IRObjectFile>> IRObjectOrError =
O.getAsIRObject(Builder.LLVMCtx);
if (IRObjectOrError) {
// A universal file member can be a MachOObjectFile, an IRObject or an
// Archive. In case we can successfully cast the member as an
// IRObject, it is safe to throw away the error generated due to
// casting the object as a MachOObjectFile.
consumeError(MachOObjOrErr.takeError());
NewArchiveMember NewMember =
NewArchiveMember(IRObjectOrError->get()->getMemoryBufferRef());
NewMember.MemberName = sys::path::filename(NewMember.MemberName);
if (Error E = verifyAndAddIRObject(std::move(NewMember)))
return E;
continue;
}
Expected<std::unique_ptr<Archive>> ArchiveOrError = O.getAsArchive();
if (ArchiveOrError) {
// A universal file member can be a MachOObjectFile, an IRObject or an
// Archive. In case we can successfully cast the member as an Archive,
// it is safe to throw away the error generated due to casting the
// object as a MachOObjectFile.
consumeError(MachOObjOrErr.takeError());
consumeError(IRObjectOrError.takeError());
if (Error E = processArchive(**ArchiveOrError))
return E;
continue;
}
Error CombinedError = joinErrors(
ArchiveOrError.takeError(),
joinErrors(IRObjectOrError.takeError(), MachOObjOrErr.takeError()));
return createFileError(FileName, std::move(CombinedError));
}
// Update vector FileBuffers with the MemoryBuffers to transfer
// ownership.
Builder.Data.FileBuffers.push_back(std::move(NewMember.Buf));
return Error::success();
}
};
MembersData Data;
LLVMContext &LLVMCtx;
const Config &C;
};
static Expected<SmallVector<Slice, 2>>
buildSlices(LLVMContext &LLVMCtx,
ArrayRef<OwningBinary<Archive>> OutputBinaries) {
SmallVector<Slice, 2> Slices;
for (const auto &OB : OutputBinaries) {
const Archive &A = *OB.getBinary();
Expected<Slice> ArchiveSlice = Slice::create(A, &LLVMCtx);
if (!ArchiveSlice)
return ArchiveSlice.takeError();
Slices.push_back(*ArchiveSlice);
}
return Slices;
}
static Error
checkForDuplicates(const MembersPerArchitectureMap &MembersPerArch) {
for (const auto &M : MembersPerArch) {
ArrayRef<NewArchiveMember> Members = M.second.getMembers();
ArrayRef<StringRef> Files = M.second.getFiles();
MapVector<StringRef, SmallVector<StringRef, 1>> MembersToFiles;
for (auto Iterators = std::make_pair(Members.begin(), Files.begin());
Iterators.first != Members.end();
++Iterators.first, ++Iterators.second) {
assert(Iterators.second != Files.end() &&
"Files should be the same size as Members.");
MembersToFiles[Iterators.first->MemberName].push_back(*Iterators.second);
}
std::string ErrorData;
raw_string_ostream ErrorStream(ErrorData);
for (const auto &[Key, Value] : MembersToFiles) {
if (Value.size() > 1) {
ErrorStream << "file '" << Key << "' was specified multiple times.\n";
for (StringRef OriginalFile : Value)
ErrorStream << "in: " << OriginalFile.str() << '\n';
ErrorStream << '\n';
}
}
ErrorStream.flush();
if (ErrorData.size() > 0)
return createStringError(std::errc::invalid_argument, ErrorData.c_str());
}
return Error::success();
}
static Error createStaticLibrary(LLVMContext &LLVMCtx, const Config &C) {
MembersBuilder Builder(LLVMCtx, C);
auto DataOrError = Builder.build();
if (auto Error = DataOrError.takeError())
return Error;
const auto &NewMembers = DataOrError->MembersPerArchitecture;
if (Error E = checkForDuplicates(NewMembers)) {
if (WarningsAsErrors)
return E;
WithColor::defaultWarningHandler(std::move(E));
}
if (NewMembers.size() == 1)
return writeArchive(OutputFile, NewMembers.begin()->second.getMembers(),
SymtabWritingMode::NormalSymtab,
/*Kind=*/object::Archive::K_DARWIN, C.Deterministic,
/*Thin=*/false);
SmallVector<OwningBinary<Archive>, 2> OutputBinaries;
for (const std::pair<const uint64_t, NewArchiveMemberList> &M : NewMembers) {
Expected<std::unique_ptr<MemoryBuffer>> OutputBufferOrErr =
writeArchiveToBuffer(
M.second.getMembers(), SymtabWritingMode::NormalSymtab,
/*Kind=*/object::Archive::K_DARWIN, C.Deterministic,
/*Thin=*/false);
if (!OutputBufferOrErr)
return OutputBufferOrErr.takeError();
std::unique_ptr<MemoryBuffer> &OutputBuffer = OutputBufferOrErr.get();
Expected<std::unique_ptr<Archive>> ArchiveOrError =
Archive::create(OutputBuffer->getMemBufferRef());
if (!ArchiveOrError)
return ArchiveOrError.takeError();
std::unique_ptr<Archive> &A = ArchiveOrError.get();
OutputBinaries.push_back(
OwningBinary<Archive>(std::move(A), std::move(OutputBuffer)));
}
Expected<SmallVector<Slice, 2>> Slices = buildSlices(LLVMCtx, OutputBinaries);
if (!Slices)
return Slices.takeError();
llvm::stable_sort(*Slices);
return writeUniversalBinary(*Slices, OutputFile);
}
static void parseRawArgs(int Argc, char **Argv) {
LibtoolDarwinOptTable Tbl;
llvm::BumpPtrAllocator A;
llvm::StringSaver Saver{A};
opt::InputArgList Args =
Tbl.parseArgs(Argc, Argv, OPT_UNKNOWN, Saver, [&](StringRef Msg) {
llvm::errs() << Msg << '\n';
std::exit(1);
});
if (Args.hasArg(OPT_help)) {
Tbl.printHelp(llvm::outs(), "llvm-libtool-darwin [options] <input files>",
"llvm-libtool-darwin");
std::exit(0);
}
InputFiles = Args.getAllArgValues(OPT_INPUT);
Libraries = Args.getAllArgValues(OPT_libraries);
LibrarySearchDirs = Args.getAllArgValues(OPT_librarySearchDirs);
if (const opt::Arg *A = Args.getLastArg(OPT_outputFile))
OutputFile = A->getValue();
if (const opt::Arg *A = Args.getLastArg(OPT_archType))
ArchType = std::make_optional(A->getValue());
if (const opt::Arg *A = Args.getLastArg(OPT_fileList))
FileList = A->getValue();
if (const opt::Arg *A = Args.getLastArg(OPT_dependencyInfoPath))
DependencyInfoPath = A->getValue();
if (const opt::Arg *A = Args.getLastArg(OPT_ignoredSyslibRoot))
IgnoredSyslibRoot = A->getValue();
LibraryOperation =
Args.hasArg(OPT_static) ? Operation::Static : Operation::None;
DeterministicOption = Args.hasArg(OPT_deterministicOption);
NonDeterministicOption = Args.hasArg(OPT_nonDeterministicOption);
VersionOption = Args.hasArg(OPT_version);
NoWarningForNoSymbols = Args.hasArg(OPT_noWarningForNoSymbols);
WarningsAsErrors = Args.hasArg(OPT_warningsAsErrors);
}
static Expected<Config> parseCommandLine(int Argc, char **Argv) {
Config C;
parseRawArgs(Argc, Argv);
if (LibraryOperation == Operation::None) {
if (!VersionOption) {
return createStringError(std::errc::invalid_argument,
"-static option: must be specified");
}
return C;
}
GlobalDependencyInfo =
DependencyInfoPath.empty()
? std::make_unique<DummyDependencyInfo>()
: std::make_unique<DependencyInfo>(DependencyInfoPath);
if (OutputFile.empty()) {
return createStringError(std::errc::invalid_argument,
"-o option: must be specified");
}
if (DeterministicOption && NonDeterministicOption)
return createStringError(std::errc::invalid_argument,
"cannot specify both -D and -U flags");
else if (NonDeterministicOption)
C.Deterministic = false;
if (!Libraries.empty())
if (Error E = processCommandLineLibraries())
return std::move(E);
if (!FileList.empty())
if (Error E = processFileList())
return std::move(E);
if (InputFiles.empty())
return createStringError(std::errc::invalid_argument,
"no input files specified");
if (ArchType) {
if (Error E = validateArchitectureName(ArchType.value()))
return std::move(E);
std::tie(C.ArchCPUType, C.ArchCPUSubtype) =
MachO::getCPUTypeFromArchitecture(
MachO::getArchitectureFromName(ArchType.value()));
}
GlobalDependencyInfo->write("llvm-libtool-darwin " LLVM_VERSION_STRING,
InputFiles, OutputFile);
return C;
}
int llvm_libtool_darwin_main(int Argc, char **Argv, const llvm::ToolContext &) {
Expected<Config> ConfigOrErr = parseCommandLine(Argc, Argv);
if (!ConfigOrErr) {
WithColor::defaultErrorHandler(ConfigOrErr.takeError());
return EXIT_FAILURE;
}
if (VersionOption)
cl::PrintVersionMessage();
llvm::InitializeAllTargetInfos();
llvm::InitializeAllTargetMCs();
llvm::InitializeAllAsmParsers();
LLVMContext LLVMCtx;
Config C = *ConfigOrErr;
switch (LibraryOperation) {
case Operation::None:
break;
case Operation::Static:
if (Error E = createStaticLibrary(LLVMCtx, C)) {
WithColor::defaultErrorHandler(std::move(E));
return EXIT_FAILURE;
}
break;
}
return EXIT_SUCCESS;
}
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