Index: tools/llvm-ar/llvm-ar.cpp =================================================================== --- tools/llvm-ar/llvm-ar.cpp +++ tools/llvm-ar/llvm-ar.cpp @@ -1,1018 +1,1046 @@ -//===-- llvm-ar.cpp - LLVM archive librarian utility ----------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// Builds up (relatively) standard unix archive files (.a) containing LLVM -// bitcode or other files. -// -//===----------------------------------------------------------------------===// - -#include "llvm/ADT/StringSwitch.h" -#include "llvm/ADT/Triple.h" -#include "llvm/IR/LLVMContext.h" -#include "llvm/Object/Archive.h" -#include "llvm/Object/ArchiveWriter.h" -#include "llvm/Object/MachO.h" -#include "llvm/Object/ObjectFile.h" -#include "llvm/Support/Chrono.h" -#include "llvm/Support/CommandLine.h" -#include "llvm/Support/Errc.h" -#include "llvm/Support/FileSystem.h" -#include "llvm/Support/Format.h" -#include "llvm/Support/FormatVariadic.h" -#include "llvm/Support/InitLLVM.h" -#include "llvm/Support/LineIterator.h" -#include "llvm/Support/MemoryBuffer.h" -#include "llvm/Support/Path.h" -#include "llvm/Support/Process.h" -#include "llvm/Support/StringSaver.h" -#include "llvm/Support/TargetSelect.h" -#include "llvm/Support/ToolOutputFile.h" -#include "llvm/Support/raw_ostream.h" -#include "llvm/ToolDrivers/llvm-dlltool/DlltoolDriver.h" -#include "llvm/ToolDrivers/llvm-lib/LibDriver.h" - -#if !defined(_MSC_VER) && !defined(__MINGW32__) -#include -#else -#include -#endif - -using namespace llvm; - -// The name this program was invoked as. -static StringRef ToolName; - -// The basename of this program. -static StringRef Stem; - -const char RanlibHelp[] = R"( -OVERVIEW: LLVM Ranlib (llvm-ranlib) - - This program generates an index to speed access to archives - -USAGE: llvm-ranlib - -OPTIONS: - -help - Display available options - -version - Display the version of this program -)"; - -const char ArHelp[] = R"( -OVERVIEW: LLVM Archiver - -USAGE: llvm-ar [options] [-][modifiers] [relpos] [files] - llvm-ar -M [ - Ignored for compatibility - --help - Display available options - --version - Display the version of this program - -OPERATIONS: - d - delete [files] from the archive - m - move [files] in the archive - p - print [files] found in the archive - q - quick append [files] to the archive - r - replace or insert [files] into the archive - s - act as ranlib - t - display contents of archive - x - extract [files] from the archive - -MODIFIERS: - [a] - put [files] after [relpos] - [b] - put [files] before [relpos] (same as [i]) - [c] - do not warn if archive had to be created - [D] - use zero for timestamps and uids/gids (default) - [i] - put [files] before [relpos] (same as [b]) - [l] - ignored for compatibility - [L] - add archive's contents - [o] - preserve original dates - [s] - create an archive index (cf. ranlib) - [S] - do not build a symbol table - [T] - create a thin archive - [u] - update only [files] newer than archive contents - [U] - use actual timestamps and uids/gids - [v] - be verbose about actions taken -)"; - -void printHelpMessage() { - if (Stem.contains_lower("ranlib")) - outs() << RanlibHelp; - else if (Stem.contains_lower("ar")) - outs() << ArHelp; -} - -// Show the error message and exit. -LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) { - errs() << ToolName << ": " << Error << ".\n"; - printHelpMessage(); - exit(1); -} - -static void failIfError(std::error_code EC, Twine Context = "") { - if (!EC) - return; - - std::string ContextStr = Context.str(); - if (ContextStr == "") - fail(EC.message()); - fail(Context + ": " + EC.message()); -} - -static void failIfError(Error E, Twine Context = "") { - if (!E) - return; - - handleAllErrors(std::move(E), [&](const llvm::ErrorInfoBase &EIB) { - std::string ContextStr = Context.str(); - if (ContextStr == "") - fail(EIB.message()); - fail(Context + ": " + EIB.message()); - }); -} - -static SmallVector PositionalArgs; - -static bool MRI; - -namespace { -enum Format { Default, GNU, BSD, DARWIN, Unknown }; -} - -static Format FormatType = Default; - -static std::string Options; - -// This enumeration delineates the kinds of operations on an archive -// that are permitted. -enum ArchiveOperation { - Print, ///< Print the contents of the archive - Delete, ///< Delete the specified members - Move, ///< Move members to end or as given by {a,b,i} modifiers - QuickAppend, ///< Quickly append to end of archive - ReplaceOrInsert, ///< Replace or Insert members - DisplayTable, ///< Display the table of contents - Extract, ///< Extract files back to file system - CreateSymTab ///< Create a symbol table in an existing archive -}; - -// Modifiers to follow operation to vary behavior -static bool AddAfter = false; ///< 'a' modifier -static bool AddBefore = false; ///< 'b' modifier -static bool Create = false; ///< 'c' modifier -static bool OriginalDates = false; ///< 'o' modifier -static bool OnlyUpdate = false; ///< 'u' modifier -static bool Verbose = false; ///< 'v' modifier -static bool Symtab = true; ///< 's' modifier -static bool Deterministic = true; ///< 'D' and 'U' modifiers -static bool Thin = false; ///< 'T' modifier -static bool AddLibrary = false; ///< 'L' modifier - -// Relative Positional Argument (for insert/move). This variable holds -// the name of the archive member to which the 'a', 'b' or 'i' modifier -// refers. Only one of 'a', 'b' or 'i' can be specified so we only need -// one variable. -static std::string RelPos; - -// This variable holds the name of the archive file as given on the -// command line. -static std::string ArchiveName; - -// This variable holds the list of member files to proecess, as given -// on the command line. -static std::vector Members; - -// Extract the member filename from the command line for the [relpos] argument -// associated with a, b, and i modifiers -static void getRelPos() { - if (PositionalArgs.size() == 0) - fail("Expected [relpos] for a, b, or i modifier"); - RelPos = PositionalArgs[0]; - PositionalArgs.erase(PositionalArgs.begin()); -} - -// Get the archive file name from the command line -static void getArchive() { - if (PositionalArgs.size() == 0) - fail("An archive name must be specified"); - ArchiveName = PositionalArgs[0]; - PositionalArgs.erase(PositionalArgs.begin()); -} - -// Copy over remaining items in PositionalArgs to our Members vector -static void getMembers() { - for (auto &Arg : PositionalArgs) - Members.push_back(Arg); -} - -std::vector> ArchiveBuffers; -std::vector> Archives; - -static object::Archive &readLibrary(const Twine &Library) { - auto BufOrErr = MemoryBuffer::getFile(Library, -1, false); - failIfError(BufOrErr.getError(), "Could not open library"); - ArchiveBuffers.push_back(std::move(*BufOrErr)); - auto LibOrErr = - object::Archive::create(ArchiveBuffers.back()->getMemBufferRef()); - failIfError(errorToErrorCode(LibOrErr.takeError()), - "Could not parse library"); - Archives.push_back(std::move(*LibOrErr)); - return *Archives.back(); -} - -static void runMRIScript(); - -// Parse the command line options as presented and return the operation -// specified. Process all modifiers and check to make sure that constraints on -// modifier/operation pairs have not been violated. -static ArchiveOperation parseCommandLine() { - if (MRI) { - if (!PositionalArgs.empty() || !Options.empty()) - fail("Cannot mix -M and other options"); - runMRIScript(); - } - - // Keep track of number of operations. We can only specify one - // per execution. - unsigned NumOperations = 0; - - // Keep track of the number of positional modifiers (a,b,i). Only - // one can be specified. - unsigned NumPositional = 0; - - // Keep track of which operation was requested - ArchiveOperation Operation; - - bool MaybeJustCreateSymTab = false; - - for(unsigned i=0; i 1) - fail("Only one operation may be specified"); - if (NumPositional > 1) - fail("You may only specify one of a, b, and i modifiers"); - if (AddAfter || AddBefore) { - if (Operation != Move && Operation != ReplaceOrInsert) - fail("The 'a', 'b' and 'i' modifiers can only be specified with " - "the 'm' or 'r' operations"); - } - if (OriginalDates && Operation != Extract) - fail("The 'o' modifier is only applicable to the 'x' operation"); - if (OnlyUpdate && Operation != ReplaceOrInsert) - fail("The 'u' modifier is only applicable to the 'r' operation"); - if (AddLibrary && Operation != QuickAppend) - fail("The 'L' modifier is only applicable to the 'q' operation"); - - // Return the parsed operation to the caller - return Operation; -} - -// Implements the 'p' operation. This function traverses the archive -// looking for members that match the path list. -static void doPrint(StringRef Name, const object::Archive::Child &C) { - if (Verbose) - outs() << "Printing " << Name << "\n"; - - Expected DataOrErr = C.getBuffer(); - failIfError(DataOrErr.takeError()); - StringRef Data = *DataOrErr; - outs().write(Data.data(), Data.size()); -} - -// Utility function for printing out the file mode when the 't' operation is in -// verbose mode. -static void printMode(unsigned mode) { - outs() << ((mode & 004) ? "r" : "-"); - outs() << ((mode & 002) ? "w" : "-"); - outs() << ((mode & 001) ? "x" : "-"); -} - -// Implement the 't' operation. This function prints out just -// the file names of each of the members. However, if verbose mode is requested -// ('v' modifier) then the file type, permission mode, user, group, size, and -// modification time are also printed. -static void doDisplayTable(StringRef Name, const object::Archive::Child &C) { - if (Verbose) { - Expected ModeOrErr = C.getAccessMode(); - failIfError(ModeOrErr.takeError()); - sys::fs::perms Mode = ModeOrErr.get(); - printMode((Mode >> 6) & 007); - printMode((Mode >> 3) & 007); - printMode(Mode & 007); - Expected UIDOrErr = C.getUID(); - failIfError(UIDOrErr.takeError()); - outs() << ' ' << UIDOrErr.get(); - Expected GIDOrErr = C.getGID(); - failIfError(GIDOrErr.takeError()); - outs() << '/' << GIDOrErr.get(); - Expected Size = C.getSize(); - failIfError(Size.takeError()); - outs() << ' ' << format("%6llu", Size.get()); - auto ModTimeOrErr = C.getLastModified(); - failIfError(ModTimeOrErr.takeError()); - // Note: formatv() only handles the default TimePoint<>, which is in - // nanoseconds. - // TODO: fix format_provider> to allow other units. - sys::TimePoint<> ModTimeInNs = ModTimeOrErr.get(); - outs() << ' ' << formatv("{0:%b %e %H:%M %Y}", ModTimeInNs); - outs() << ' '; - } - - if (C.getParent()->isThin()) { - outs() << sys::path::parent_path(ArchiveName); - outs() << '/'; - } - outs() << Name << "\n"; -} - -// Implement the 'x' operation. This function extracts files back to the file -// system. -static void doExtract(StringRef Name, const object::Archive::Child &C) { - // Retain the original mode. - Expected ModeOrErr = C.getAccessMode(); - failIfError(ModeOrErr.takeError()); - sys::fs::perms Mode = ModeOrErr.get(); - - int FD; - failIfError(sys::fs::openFileForWrite(sys::path::filename(Name), FD, - sys::fs::CD_CreateAlways, - sys::fs::F_None, Mode), - Name); - - { - raw_fd_ostream file(FD, false); - - // Get the data and its length - Expected BufOrErr = C.getBuffer(); - failIfError(BufOrErr.takeError()); - StringRef Data = BufOrErr.get(); - - // Write the data. - file.write(Data.data(), Data.size()); - } - - // If we're supposed to retain the original modification times, etc. do so - // now. - if (OriginalDates) { - auto ModTimeOrErr = C.getLastModified(); - failIfError(ModTimeOrErr.takeError()); - failIfError( - sys::fs::setLastAccessAndModificationTime(FD, ModTimeOrErr.get())); - } - - if (close(FD)) - fail("Could not close the file"); -} - -static bool shouldCreateArchive(ArchiveOperation Op) { - switch (Op) { - case Print: - case Delete: - case Move: - case DisplayTable: - case Extract: - case CreateSymTab: - return false; - - case QuickAppend: - case ReplaceOrInsert: - return true; - } - - llvm_unreachable("Missing entry in covered switch."); -} - -static void performReadOperation(ArchiveOperation Operation, - object::Archive *OldArchive) { - if (Operation == Extract && OldArchive->isThin()) - fail("extracting from a thin archive is not supported"); - - bool Filter = !Members.empty(); - { - Error Err = Error::success(); - for (auto &C : OldArchive->children(Err)) { - Expected NameOrErr = C.getName(); - failIfError(NameOrErr.takeError()); - StringRef Name = NameOrErr.get(); - - if (Filter) { - auto I = find(Members, Name); - if (I == Members.end()) - continue; - Members.erase(I); - } - - switch (Operation) { - default: - llvm_unreachable("Not a read operation"); - case Print: - doPrint(Name, C); - break; - case DisplayTable: - doDisplayTable(Name, C); - break; - case Extract: - doExtract(Name, C); - break; - } - } - failIfError(std::move(Err)); - } - - if (Members.empty()) - return; - for (StringRef Name : Members) - errs() << Name << " was not found\n"; - exit(1); -} - -static void addMember(std::vector &Members, - StringRef FileName, int Pos = -1) { - Expected NMOrErr = - NewArchiveMember::getFile(FileName, Deterministic); - failIfError(NMOrErr.takeError(), FileName); - - // Use the basename of the object path for the member name. - NMOrErr->MemberName = sys::path::filename(NMOrErr->MemberName); - - if (Pos == -1) - Members.push_back(std::move(*NMOrErr)); - else - Members[Pos] = std::move(*NMOrErr); -} - -static void addMember(std::vector &Members, - const object::Archive::Child &M, int Pos = -1) { - if (Thin && !M.getParent()->isThin()) - fail("Cannot convert a regular archive to a thin one"); - Expected NMOrErr = - NewArchiveMember::getOldMember(M, Deterministic); - failIfError(NMOrErr.takeError()); - if (Pos == -1) - Members.push_back(std::move(*NMOrErr)); - else - Members[Pos] = std::move(*NMOrErr); -} - -static void addLibMember(std::vector &Members, - StringRef FileName) { - Expected NMOrErr = - NewArchiveMember::getFile(FileName, Deterministic); - failIfError(NMOrErr.takeError(), FileName); - if (identify_magic(NMOrErr->Buf->getBuffer()) == file_magic::archive) { - object::Archive &Lib = readLibrary(FileName); - Error Err = Error::success(); - - for (auto &Child : Lib.children(Err)) - addMember(Members, Child); - - failIfError(std::move(Err)); - } else { - // Use the basename of the object path for the member name. - NMOrErr->MemberName = sys::path::filename(NMOrErr->MemberName); - Members.push_back(std::move(*NMOrErr)); - } -} - -enum InsertAction { - IA_AddOldMember, - IA_AddNewMember, - IA_Delete, - IA_MoveOldMember, - IA_MoveNewMember -}; - -static InsertAction computeInsertAction(ArchiveOperation Operation, - const object::Archive::Child &Member, - StringRef Name, - std::vector::iterator &Pos) { - if (Operation == QuickAppend || Members.empty()) - return IA_AddOldMember; - - auto MI = find_if(Members, [Name](StringRef Path) { - return Name == sys::path::filename(Path); - }); - - if (MI == Members.end()) - return IA_AddOldMember; - - Pos = MI; - - if (Operation == Delete) - return IA_Delete; - - if (Operation == Move) - return IA_MoveOldMember; - - if (Operation == ReplaceOrInsert) { - StringRef PosName = sys::path::filename(RelPos); - if (!OnlyUpdate) { - if (PosName.empty()) - return IA_AddNewMember; - return IA_MoveNewMember; - } - - // We could try to optimize this to a fstat, but it is not a common - // operation. - sys::fs::file_status Status; - failIfError(sys::fs::status(*MI, Status), *MI); - auto ModTimeOrErr = Member.getLastModified(); - failIfError(ModTimeOrErr.takeError()); - if (Status.getLastModificationTime() < ModTimeOrErr.get()) { - if (PosName.empty()) - return IA_AddOldMember; - return IA_MoveOldMember; - } - - if (PosName.empty()) - return IA_AddNewMember; - return IA_MoveNewMember; - } - llvm_unreachable("No such operation"); -} - -// We have to walk this twice and computing it is not trivial, so creating an -// explicit std::vector is actually fairly efficient. -static std::vector -computeNewArchiveMembers(ArchiveOperation Operation, - object::Archive *OldArchive) { - std::vector Ret; - std::vector Moved; - int InsertPos = -1; - StringRef PosName = sys::path::filename(RelPos); - if (OldArchive) { - Error Err = Error::success(); - for (auto &Child : OldArchive->children(Err)) { - int Pos = Ret.size(); - Expected NameOrErr = Child.getName(); - failIfError(NameOrErr.takeError()); - StringRef Name = NameOrErr.get(); - if (Name == PosName) { - assert(AddAfter || AddBefore); - if (AddBefore) - InsertPos = Pos; - else - InsertPos = Pos + 1; - } - - std::vector::iterator MemberI = Members.end(); - InsertAction Action = - computeInsertAction(Operation, Child, Name, MemberI); - switch (Action) { - case IA_AddOldMember: - addMember(Ret, Child); - break; - case IA_AddNewMember: - addMember(Ret, *MemberI); - break; - case IA_Delete: - break; - case IA_MoveOldMember: - addMember(Moved, Child); - break; - case IA_MoveNewMember: - addMember(Moved, *MemberI); - break; - } - if (MemberI != Members.end()) - Members.erase(MemberI); - } - failIfError(std::move(Err)); - } - - if (Operation == Delete) - return Ret; - - if (!RelPos.empty() && InsertPos == -1) - fail("Insertion point not found"); - - if (RelPos.empty()) - InsertPos = Ret.size(); - - assert(unsigned(InsertPos) <= Ret.size()); - int Pos = InsertPos; - for (auto &M : Moved) { - Ret.insert(Ret.begin() + Pos, std::move(M)); - ++Pos; - } - - if (AddLibrary) { - assert(Operation == QuickAppend); - for (auto &Member : Members) - addLibMember(Ret, Member); - return Ret; - } - - for (unsigned I = 0; I != Members.size(); ++I) - Ret.insert(Ret.begin() + InsertPos, NewArchiveMember()); - Pos = InsertPos; - for (auto &Member : Members) { - addMember(Ret, Member, Pos); - ++Pos; - } - - return Ret; -} - -static object::Archive::Kind getDefaultForHost() { - return Triple(sys::getProcessTriple()).isOSDarwin() - ? object::Archive::K_DARWIN - : object::Archive::K_GNU; -} - -static object::Archive::Kind getKindFromMember(const NewArchiveMember &Member) { - Expected> OptionalObject = - object::ObjectFile::createObjectFile(Member.Buf->getMemBufferRef()); - - if (OptionalObject) - return isa(**OptionalObject) - ? object::Archive::K_DARWIN - : object::Archive::K_GNU; - - // squelch the error in case we had a non-object file - consumeError(OptionalObject.takeError()); - return getDefaultForHost(); -} - -static void -performWriteOperation(ArchiveOperation Operation, - object::Archive *OldArchive, - std::unique_ptr OldArchiveBuf, - std::vector *NewMembersP) { - std::vector NewMembers; - if (!NewMembersP) - NewMembers = computeNewArchiveMembers(Operation, OldArchive); - - object::Archive::Kind Kind; - switch (FormatType) { - case Default: - if (Thin) - Kind = object::Archive::K_GNU; - else if (OldArchive) - Kind = OldArchive->kind(); - else if (NewMembersP) - Kind = NewMembersP->size() ? getKindFromMember(NewMembersP->front()) - : getDefaultForHost(); - else - Kind = NewMembers.size() ? getKindFromMember(NewMembers.front()) - : getDefaultForHost(); - break; - case GNU: - Kind = object::Archive::K_GNU; - break; - case BSD: - if (Thin) - fail("Only the gnu format has a thin mode"); - Kind = object::Archive::K_BSD; - break; - case DARWIN: - if (Thin) - fail("Only the gnu format has a thin mode"); - Kind = object::Archive::K_DARWIN; - break; - case Unknown: - llvm_unreachable(""); - } - - Error E = - writeArchive(ArchiveName, NewMembersP ? *NewMembersP : NewMembers, Symtab, - Kind, Deterministic, Thin, std::move(OldArchiveBuf)); - failIfError(std::move(E), ArchiveName); -} - -static void createSymbolTable(object::Archive *OldArchive) { - // When an archive is created or modified, if the s option is given, the - // resulting archive will have a current symbol table. If the S option - // is given, it will have no symbol table. - // In summary, we only need to update the symbol table if we have none. - // This is actually very common because of broken build systems that think - // they have to run ranlib. - if (OldArchive->hasSymbolTable()) - return; - - performWriteOperation(CreateSymTab, OldArchive, nullptr, nullptr); -} - -static void performOperation(ArchiveOperation Operation, - object::Archive *OldArchive, - std::unique_ptr OldArchiveBuf, - std::vector *NewMembers) { - switch (Operation) { - case Print: - case DisplayTable: - case Extract: - performReadOperation(Operation, OldArchive); - return; - - case Delete: - case Move: - case QuickAppend: - case ReplaceOrInsert: - performWriteOperation(Operation, OldArchive, std::move(OldArchiveBuf), - NewMembers); - return; - case CreateSymTab: - createSymbolTable(OldArchive); - return; - } - llvm_unreachable("Unknown operation."); -} - -static int performOperation(ArchiveOperation Operation, - std::vector *NewMembers) { - // Create or open the archive object. - ErrorOr> Buf = - MemoryBuffer::getFile(ArchiveName, -1, false); - std::error_code EC = Buf.getError(); - if (EC && EC != errc::no_such_file_or_directory) - fail("error opening '" + ArchiveName + "': " + EC.message() + "!"); - - if (!EC) { - Error Err = Error::success(); - object::Archive Archive(Buf.get()->getMemBufferRef(), Err); - EC = errorToErrorCode(std::move(Err)); - failIfError(EC, - "error loading '" + ArchiveName + "': " + EC.message() + "!"); - performOperation(Operation, &Archive, std::move(Buf.get()), NewMembers); - return 0; - } - - assert(EC == errc::no_such_file_or_directory); - - if (!shouldCreateArchive(Operation)) { - failIfError(EC, Twine("error loading '") + ArchiveName + "'"); - } else { - if (!Create) { - // Produce a warning if we should and we're creating the archive - errs() << ToolName << ": creating " << ArchiveName << "\n"; - } - } - - performOperation(Operation, nullptr, nullptr, NewMembers); - return 0; -} - -static void runMRIScript() { - enum class MRICommand { AddLib, AddMod, Create, Delete, Save, End, Invalid }; - - ErrorOr> Buf = MemoryBuffer::getSTDIN(); - failIfError(Buf.getError()); - const MemoryBuffer &Ref = *Buf.get(); - bool Saved = false; - std::vector NewMembers; - - for (line_iterator I(Ref, /*SkipBlanks*/ false), E; I != E; ++I) { - StringRef Line = *I; - Line = Line.split(';').first; - Line = Line.split('*').first; - Line = Line.trim(); - if (Line.empty()) - continue; - StringRef CommandStr, Rest; - std::tie(CommandStr, Rest) = Line.split(' '); - Rest = Rest.trim(); - if (!Rest.empty() && Rest.front() == '"' && Rest.back() == '"') - Rest = Rest.drop_front().drop_back(); - auto Command = StringSwitch(CommandStr.lower()) - .Case("addlib", MRICommand::AddLib) - .Case("addmod", MRICommand::AddMod) - .Case("create", MRICommand::Create) - .Case("delete", MRICommand::Delete) - .Case("save", MRICommand::Save) - .Case("end", MRICommand::End) - .Default(MRICommand::Invalid); - - switch (Command) { - case MRICommand::AddLib: { - object::Archive &Lib = readLibrary(Rest); - { - Error Err = Error::success(); - for (auto &Member : Lib.children(Err)) - addMember(NewMembers, Member); - failIfError(std::move(Err)); - } - break; - } - case MRICommand::AddMod: - addMember(NewMembers, Rest); - break; - case MRICommand::Create: - Create = true; - if (!ArchiveName.empty()) - fail("Editing multiple archives not supported"); - if (Saved) - fail("File already saved"); - ArchiveName = Rest; - break; - case MRICommand::Delete: { - StringRef Name = sys::path::filename(Rest); - llvm::erase_if(NewMembers, - [=](NewArchiveMember &M) { return M.MemberName == Name; }); - break; - } - case MRICommand::Save: - Saved = true; - break; - case MRICommand::End: - break; - case MRICommand::Invalid: - fail("Unknown command: " + CommandStr); - } - } - - // Nothing to do if not saved. - if (Saved) - performOperation(ReplaceOrInsert, &NewMembers); - exit(0); -} - -static bool handleGenericOption(StringRef arg) { - if (arg == "-help" || arg == "--help") { - printHelpMessage(); - return true; - } - if (arg == "-version" || arg == "--version") { - cl::PrintVersionMessage(); - return true; - } - return false; -} - -static int ar_main(int argc, char **argv) { - SmallVector Argv(argv, argv + argc); - BumpPtrAllocator Alloc; - StringSaver Saver(Alloc); - cl::ExpandResponseFiles(Saver, cl::TokenizeGNUCommandLine, Argv); - for(size_t i = 1; i < Argv.size(); ++i) { - StringRef Arg = Argv[i]; - const char *match; - auto MatchFlagWithArg = [&](const char *expected) { - size_t len = strlen(expected); - if (Arg == expected) { - if (++i >= Argv.size()) - fail(std::string(expected) + " requires an argument"); - match = Argv[i]; - return true; - } - if (Arg.startswith(expected) && Arg.size() > len && - Arg[len] == '=') { - match = Arg.data() + len + 1; - return true; - } - return false; - }; - if (handleGenericOption(Argv[i])) - return 0; - if (Arg == "--") { - for(; i < Argv.size(); ++i) - PositionalArgs.push_back(Argv[i]); - break; - } - if (Arg[0] == '-') { - if (Arg.startswith("--")) - Arg = Argv[i] + 2; - else - Arg = Argv[i] + 1; - if (Arg == "M") { - MRI = true; - } else if (MatchFlagWithArg("format")) { - FormatType = StringSwitch(match) - .Case("default", Default) - .Case("gnu", GNU) - .Case("darwin", DARWIN) - .Case("bsd", BSD) - .Default(Unknown); - if (FormatType == Unknown) - fail(std::string("Invalid format ") + match); - } else if (MatchFlagWithArg("plugin")) { - // Ignored. - } else { - Options += Argv[i] + 1; - } - } else if (Options.empty()) { - Options += Argv[i]; - } else { - PositionalArgs.push_back(Argv[i]); - } - } - ArchiveOperation Operation = parseCommandLine(); - return performOperation(Operation, nullptr); -} - -static int ranlib_main(int argc, char **argv) { - bool ArchiveSpecified = false; - for(int i = 1; i < argc; ++i) { - if (handleGenericOption(argv[i])) { - return 0; - } else { - if (ArchiveSpecified) - fail("Exactly one archive should be specified"); - ArchiveSpecified = true; - ArchiveName = argv[i]; - } - } - return performOperation(CreateSymTab, nullptr); -} - -int main(int argc, char **argv) { - InitLLVM X(argc, argv); - ToolName = argv[0]; - - llvm::InitializeAllTargetInfos(); - llvm::InitializeAllTargetMCs(); - llvm::InitializeAllAsmParsers(); - - Stem = sys::path::stem(ToolName); - if (Stem.contains_lower("dlltool")) - return dlltoolDriverMain(makeArrayRef(argv, argc)); - - if (Stem.contains_lower("ranlib")) - return ranlib_main(argc, argv); - - if (Stem.contains_lower("lib")) - return libDriverMain(makeArrayRef(argv, argc)); - - if (Stem.contains_lower("ar")) - return ar_main(argc, argv); - fail("Not ranlib, ar, lib or dlltool!"); -} +//===-- llvm-ar.cpp - LLVM archive librarian utility ----------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// Builds up (relatively) standard unix archive files (.a) containing LLVM +// bitcode or other files. +// +//===----------------------------------------------------------------------===// + +#include "llvm/ADT/StringSwitch.h" +#include "llvm/ADT/Triple.h" +#include "llvm/IR/LLVMContext.h" +#include "llvm/Object/Archive.h" +#include "llvm/Object/ArchiveWriter.h" +#include "llvm/Object/MachO.h" +#include "llvm/Object/ObjectFile.h" +#include "llvm/Support/Chrono.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/Errc.h" +#include "llvm/Support/FileSystem.h" +#include "llvm/Support/Format.h" +#include "llvm/Support/FormatVariadic.h" +#include "llvm/Support/InitLLVM.h" +#include "llvm/Support/LineIterator.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/Path.h" +#include "llvm/Support/Process.h" +#include "llvm/Support/StringSaver.h" +#include "llvm/Support/TargetSelect.h" +#include "llvm/Support/ToolOutputFile.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/ToolDrivers/llvm-dlltool/DlltoolDriver.h" +#include "llvm/ToolDrivers/llvm-lib/LibDriver.h" + +#if !defined(_MSC_VER) && !defined(__MINGW32__) +#include +#else +#include +#endif + +using namespace llvm; + +// The name this program was invoked as. +static StringRef ToolName; + +// The basename of this program. +static StringRef Stem; + +const char RanlibHelp[] = R"( +OVERVIEW: LLVM Ranlib (llvm-ranlib) + + This program generates an index to speed access to archives + +USAGE: llvm-ranlib + +OPTIONS: + -help - Display available options + -version - Display the version of this program +)"; + +const char ArHelp[] = R"( +OVERVIEW: LLVM Archiver + +USAGE: llvm-ar [options] [-][modifiers] [relpos] [files] + llvm-ar -M [ - Ignored for compatibility + --help - Display available options + --version - Display the version of this program + +OPERATIONS: + d - delete [files] from the archive + m - move [files] in the archive + p - print [files] found in the archive + q - quick append [files] to the archive + r - replace or insert [files] into the archive + s - act as ranlib + t - display contents of archive + x - extract [files] from the archive + +MODIFIERS: + [a] - put [files] after [relpos] + [b] - put [files] before [relpos] (same as [i]) + [c] - do not warn if archive had to be created + [D] - use zero for timestamps and uids/gids (default) + [i] - put [files] before [relpos] (same as [b]) + [l] - ignored for compatibility + [L] - add archive's contents + [o] - preserve original dates + [s] - create an archive index (cf. ranlib) + [S] - do not build a symbol table + [T] - create a thin archive + [u] - update only [files] newer than archive contents + [U] - use actual timestamps and uids/gids + [v] - be verbose about actions taken +)"; + +void printHelpMessage() { + if (Stem.contains_lower("ranlib")) + outs() << RanlibHelp; + else if (Stem.contains_lower("ar")) + outs() << ArHelp; +} + +// Show the error message and exit. +LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) { + errs() << ToolName << ": " << Error << ".\n"; + printHelpMessage(); + exit(1); +} + +static void failIfError(std::error_code EC, Twine Context = "") { + if (!EC) + return; + + std::string ContextStr = Context.str(); + if (ContextStr == "") + fail(EC.message()); + fail(Context + ": " + EC.message()); +} + +static void failIfError(Error E, Twine Context = "") { + if (!E) + return; + + handleAllErrors(std::move(E), [&](const llvm::ErrorInfoBase &EIB) { + std::string ContextStr = Context.str(); + if (ContextStr == "") + fail(EIB.message()); + fail(Context + ": " + EIB.message()); + }); +} + +static SmallVector PositionalArgs; + +static bool MRI; + +namespace { +enum Format { Default, GNU, BSD, DARWIN, Unknown }; +} + +static Format FormatType = Default; + +static std::string Options; + +// This enumeration delineates the kinds of operations on an archive +// that are permitted. +enum ArchiveOperation { + Print, ///< Print the contents of the archive + Delete, ///< Delete the specified members + Move, ///< Move members to end or as given by {a,b,i} modifiers + QuickAppend, ///< Quickly append to end of archive + ReplaceOrInsert, ///< Replace or Insert members + DisplayTable, ///< Display the table of contents + Extract, ///< Extract files back to file system + CreateSymTab ///< Create a symbol table in an existing archive +}; + +// Modifiers to follow operation to vary behavior +static bool AddAfter = false; ///< 'a' modifier +static bool AddBefore = false; ///< 'b' modifier +static bool Create = false; ///< 'c' modifier +static bool OriginalDates = false; ///< 'o' modifier +static bool OnlyUpdate = false; ///< 'u' modifier +static bool Verbose = false; ///< 'v' modifier +static bool Symtab = true; ///< 's' modifier +static bool Deterministic = true; ///< 'D' and 'U' modifiers +static bool Thin = false; ///< 'T' modifier +static bool AddLibrary = false; ///< 'L' modifier + +// Relative Positional Argument (for insert/move). This variable holds +// the name of the archive member to which the 'a', 'b' or 'i' modifier +// refers. Only one of 'a', 'b' or 'i' can be specified so we only need +// one variable. +static std::string RelPos; + +// This variable holds the name of the archive file as given on the +// command line. +static std::string ArchiveName; + +// This variable holds the list of member files to proecess, as given +// on the command line. +static std::vector Members; + +// Extract the member filename from the command line for the [relpos] argument +// associated with a, b, and i modifiers +static void getRelPos() { + if (PositionalArgs.size() == 0) + fail("Expected [relpos] for a, b, or i modifier"); + RelPos = PositionalArgs[0]; + PositionalArgs.erase(PositionalArgs.begin()); +} + +// Get the archive file name from the command line +static void getArchive() { + if (PositionalArgs.size() == 0) + fail("An archive name must be specified"); + ArchiveName = PositionalArgs[0]; + PositionalArgs.erase(PositionalArgs.begin()); +} + +// Copy over remaining items in PositionalArgs to our Members vector +static void getMembers() { + for (auto &Arg : PositionalArgs) + Members.push_back(Arg); +} + +std::vector> ArchiveBuffers; +std::vector> Archives; + +static object::Archive &readLibrary(const Twine &Library) { + auto BufOrErr = MemoryBuffer::getFile(Library, -1, false); + failIfError(BufOrErr.getError(), "Could not open library"); + ArchiveBuffers.push_back(std::move(*BufOrErr)); + auto LibOrErr = + object::Archive::create(ArchiveBuffers.back()->getMemBufferRef()); + failIfError(errorToErrorCode(LibOrErr.takeError()), + "Could not parse library"); + Archives.push_back(std::move(*LibOrErr)); + return *Archives.back(); +} + +static void runMRIScript(); + +// Parse the command line options as presented and return the operation +// specified. Process all modifiers and check to make sure that constraints on +// modifier/operation pairs have not been violated. +static ArchiveOperation parseCommandLine() { + if (MRI) { + if (!PositionalArgs.empty() || !Options.empty()) + fail("Cannot mix -M and other options"); + runMRIScript(); + } + + // Keep track of number of operations. We can only specify one + // per execution. + unsigned NumOperations = 0; + + // Keep track of the number of positional modifiers (a,b,i). Only + // one can be specified. + unsigned NumPositional = 0; + + // Keep track of which operation was requested + ArchiveOperation Operation; + + bool MaybeJustCreateSymTab = false; + + for (unsigned i = 0; i < Options.size(); ++i) { + switch (Options[i]) { + case 'd': + ++NumOperations; + Operation = Delete; + break; + case 'm': + ++NumOperations; + Operation = Move; + break; + case 'p': + ++NumOperations; + Operation = Print; + break; + case 'q': + ++NumOperations; + Operation = QuickAppend; + break; + case 'r': + ++NumOperations; + Operation = ReplaceOrInsert; + break; + case 't': + ++NumOperations; + Operation = DisplayTable; + break; + case 'x': + ++NumOperations; + Operation = Extract; + break; + case 'c': + Create = true; + break; + case 'l': /* accepted but unused */ + break; + case 'o': + OriginalDates = true; + break; + case 's': + Symtab = true; + MaybeJustCreateSymTab = true; + break; + case 'S': + Symtab = false; + break; + case 'u': + OnlyUpdate = true; + break; + case 'v': + Verbose = true; + break; + case 'a': + getRelPos(); + AddAfter = true; + NumPositional++; + break; + case 'b': + getRelPos(); + AddBefore = true; + NumPositional++; + break; + case 'i': + getRelPos(); + AddBefore = true; + NumPositional++; + break; + case 'D': + Deterministic = true; + break; + case 'U': + Deterministic = false; + break; + case 'T': + Thin = true; + break; + case 'L': + AddLibrary = true; + break; + default: + fail(std::string("unknown option ") + Options[i]); + } + } + + // At this point, the next thing on the command line must be + // the archive name. + getArchive(); + + // Everything on the command line at this point is a member. + getMembers(); + + if (NumOperations == 0 && MaybeJustCreateSymTab) { + NumOperations = 1; + Operation = CreateSymTab; + if (!Members.empty()) + fail("The s operation takes only an archive as argument"); + } + + // Perform various checks on the operation/modifier specification + // to make sure we are dealing with a legal request. + if (NumOperations == 0) + fail("You must specify at least one of the operations"); + if (NumOperations > 1) + fail("Only one operation may be specified"); + if (NumPositional > 1) + fail("You may only specify one of a, b, and i modifiers"); + if (AddAfter || AddBefore) { + if (Operation != Move && Operation != ReplaceOrInsert) + fail("The 'a', 'b' and 'i' modifiers can only be specified with " + "the 'm' or 'r' operations"); + } + if (OriginalDates && Operation != Extract) + fail("The 'o' modifier is only applicable to the 'x' operation"); + if (OnlyUpdate && Operation != ReplaceOrInsert) + fail("The 'u' modifier is only applicable to the 'r' operation"); + if (AddLibrary && Operation != QuickAppend) + fail("The 'L' modifier is only applicable to the 'q' operation"); + + // Return the parsed operation to the caller + return Operation; +} + +// Implements the 'p' operation. This function traverses the archive +// looking for members that match the path list. +static void doPrint(StringRef Name, const object::Archive::Child &C) { + if (Verbose) + outs() << "Printing " << Name << "\n"; + + Expected DataOrErr = C.getBuffer(); + failIfError(DataOrErr.takeError()); + StringRef Data = *DataOrErr; + outs().write(Data.data(), Data.size()); +} + +// Utility function for printing out the file mode when the 't' operation is in +// verbose mode. +static void printMode(unsigned mode) { + outs() << ((mode & 004) ? "r" : "-"); + outs() << ((mode & 002) ? "w" : "-"); + outs() << ((mode & 001) ? "x" : "-"); +} + +// Implement the 't' operation. This function prints out just +// the file names of each of the members. However, if verbose mode is requested +// ('v' modifier) then the file type, permission mode, user, group, size, and +// modification time are also printed. +static void doDisplayTable(StringRef Name, const object::Archive::Child &C) { + if (Verbose) { + Expected ModeOrErr = C.getAccessMode(); + failIfError(ModeOrErr.takeError()); + sys::fs::perms Mode = ModeOrErr.get(); + printMode((Mode >> 6) & 007); + printMode((Mode >> 3) & 007); + printMode(Mode & 007); + Expected UIDOrErr = C.getUID(); + failIfError(UIDOrErr.takeError()); + outs() << ' ' << UIDOrErr.get(); + Expected GIDOrErr = C.getGID(); + failIfError(GIDOrErr.takeError()); + outs() << '/' << GIDOrErr.get(); + Expected Size = C.getSize(); + failIfError(Size.takeError()); + outs() << ' ' << format("%6llu", Size.get()); + auto ModTimeOrErr = C.getLastModified(); + failIfError(ModTimeOrErr.takeError()); + // Note: formatv() only handles the default TimePoint<>, which is in + // nanoseconds. + // TODO: fix format_provider> to allow other units. + sys::TimePoint<> ModTimeInNs = ModTimeOrErr.get(); + outs() << ' ' << formatv("{0:%b %e %H:%M %Y}", ModTimeInNs); + outs() << ' '; + } + + if (C.getParent()->isThin()) { + outs() << sys::path::parent_path(ArchiveName); + outs() << '/'; + } + outs() << Name << "\n"; +} + +// Implement the 'x' operation. This function extracts files back to the file +// system. +static void doExtract(StringRef Name, const object::Archive::Child &C) { + // Retain the original mode. + Expected ModeOrErr = C.getAccessMode(); + failIfError(ModeOrErr.takeError()); + sys::fs::perms Mode = ModeOrErr.get(); + + int FD; + failIfError(sys::fs::openFileForWrite(sys::path::filename(Name), FD, + sys::fs::CD_CreateAlways, + sys::fs::F_None, Mode), + Name); + + { + raw_fd_ostream file(FD, false); + + // Get the data and its length + Expected BufOrErr = C.getBuffer(); + failIfError(BufOrErr.takeError()); + StringRef Data = BufOrErr.get(); + + // Write the data. + file.write(Data.data(), Data.size()); + } + + // If we're supposed to retain the original modification times, etc. do so + // now. + if (OriginalDates) { + auto ModTimeOrErr = C.getLastModified(); + failIfError(ModTimeOrErr.takeError()); + failIfError( + sys::fs::setLastAccessAndModificationTime(FD, ModTimeOrErr.get())); + } + + if (close(FD)) + fail("Could not close the file"); +} + +static bool shouldCreateArchive(ArchiveOperation Op) { + switch (Op) { + case Print: + case Delete: + case Move: + case DisplayTable: + case Extract: + case CreateSymTab: + return false; + + case QuickAppend: + case ReplaceOrInsert: + return true; + } + + llvm_unreachable("Missing entry in covered switch."); +} + +static void performReadOperation(ArchiveOperation Operation, + object::Archive *OldArchive) { + if (Operation == Extract && OldArchive->isThin()) + fail("extracting from a thin archive is not supported"); + + bool Filter = !Members.empty(); + { + Error Err = Error::success(); + for (auto &C : OldArchive->children(Err)) { + Expected NameOrErr = C.getName(); + failIfError(NameOrErr.takeError()); + StringRef Name = NameOrErr.get(); + + if (Filter) { + auto I = find(Members, Name); + if (I == Members.end()) + continue; + Members.erase(I); + } + + switch (Operation) { + default: + llvm_unreachable("Not a read operation"); + case Print: + doPrint(Name, C); + break; + case DisplayTable: + doDisplayTable(Name, C); + break; + case Extract: + doExtract(Name, C); + break; + } + } + failIfError(std::move(Err)); + } + + if (Members.empty()) + return; + for (StringRef Name : Members) + errs() << Name << " was not found\n"; + exit(1); +} + +static void addMember(std::vector &Members, + StringRef FileName, int Pos = -1) { + Expected NMOrErr = + NewArchiveMember::getFile(FileName, Deterministic); + failIfError(NMOrErr.takeError(), FileName); + + // Use the basename of the object path for the member name. + NMOrErr->MemberName = sys::path::filename(NMOrErr->MemberName); + + if (Pos == -1) + Members.push_back(std::move(*NMOrErr)); + else + Members[Pos] = std::move(*NMOrErr); +} + +static void addMember(std::vector &Members, + const object::Archive::Child &M, int Pos = -1) { + if (Thin && !M.getParent()->isThin()) + fail("Cannot convert a regular archive to a thin one"); + Expected NMOrErr = + NewArchiveMember::getOldMember(M, Deterministic); + failIfError(NMOrErr.takeError()); + if (Pos == -1) + Members.push_back(std::move(*NMOrErr)); + else + Members[Pos] = std::move(*NMOrErr); +} + +static void addLibMember(std::vector &Members, + StringRef FileName) { + Expected NMOrErr = + NewArchiveMember::getFile(FileName, Deterministic); + failIfError(NMOrErr.takeError(), FileName); + if (identify_magic(NMOrErr->Buf->getBuffer()) == file_magic::archive) { + object::Archive &Lib = readLibrary(FileName); + Error Err = Error::success(); + + for (auto &Child : Lib.children(Err)) + addMember(Members, Child); + + failIfError(std::move(Err)); + } else { + // Use the basename of the object path for the member name. + NMOrErr->MemberName = sys::path::filename(NMOrErr->MemberName); + Members.push_back(std::move(*NMOrErr)); + } +} + +enum InsertAction { + IA_AddOldMember, + IA_AddNewMember, + IA_Delete, + IA_MoveOldMember, + IA_MoveNewMember +}; + +static InsertAction computeInsertAction(ArchiveOperation Operation, + const object::Archive::Child &Member, + StringRef Name, + std::vector::iterator &Pos) { + if (Operation == QuickAppend || Members.empty()) + return IA_AddOldMember; + + auto MI = find_if(Members, [Name](StringRef Path) { + return Name == sys::path::filename(Path); + }); + + if (MI == Members.end()) + return IA_AddOldMember; + + Pos = MI; + + if (Operation == Delete) + return IA_Delete; + + if (Operation == Move) + return IA_MoveOldMember; + + if (Operation == ReplaceOrInsert) { + StringRef PosName = sys::path::filename(RelPos); + if (!OnlyUpdate) { + if (PosName.empty()) + return IA_AddNewMember; + return IA_MoveNewMember; + } + + // We could try to optimize this to a fstat, but it is not a common + // operation. + sys::fs::file_status Status; + failIfError(sys::fs::status(*MI, Status), *MI); + auto ModTimeOrErr = Member.getLastModified(); + failIfError(ModTimeOrErr.takeError()); + if (Status.getLastModificationTime() < ModTimeOrErr.get()) { + if (PosName.empty()) + return IA_AddOldMember; + return IA_MoveOldMember; + } + + if (PosName.empty()) + return IA_AddNewMember; + return IA_MoveNewMember; + } + llvm_unreachable("No such operation"); +} + +// We have to walk this twice and computing it is not trivial, so creating an +// explicit std::vector is actually fairly efficient. +static std::vector +computeNewArchiveMembers(ArchiveOperation Operation, + object::Archive *OldArchive) { + std::vector Ret; + std::vector Moved; + int InsertPos = -1; + StringRef PosName = sys::path::filename(RelPos); + if (OldArchive) { + Error Err = Error::success(); + for (auto &Child : OldArchive->children(Err)) { + int Pos = Ret.size(); + Expected NameOrErr = Child.getName(); + failIfError(NameOrErr.takeError()); + StringRef Name = NameOrErr.get(); + if (Name == PosName) { + assert(AddAfter || AddBefore); + if (AddBefore) + InsertPos = Pos; + else + InsertPos = Pos + 1; + } + + std::vector::iterator MemberI = Members.end(); + InsertAction Action = + computeInsertAction(Operation, Child, Name, MemberI); + switch (Action) { + case IA_AddOldMember: + addMember(Ret, Child); + break; + case IA_AddNewMember: + addMember(Ret, *MemberI); + break; + case IA_Delete: + break; + case IA_MoveOldMember: + addMember(Moved, Child); + break; + case IA_MoveNewMember: + addMember(Moved, *MemberI); + break; + } + if (MemberI != Members.end()) + Members.erase(MemberI); + } + failIfError(std::move(Err)); + } + + if (Operation == Delete) + return Ret; + + if (!RelPos.empty() && InsertPos == -1) + fail("Insertion point not found"); + + if (RelPos.empty()) + InsertPos = Ret.size(); + + assert(unsigned(InsertPos) <= Ret.size()); + int Pos = InsertPos; + for (auto &M : Moved) { + Ret.insert(Ret.begin() + Pos, std::move(M)); + ++Pos; + } + + if (AddLibrary) { + assert(Operation == QuickAppend); + for (auto &Member : Members) + addLibMember(Ret, Member); + return Ret; + } + + for (unsigned I = 0; I != Members.size(); ++I) + Ret.insert(Ret.begin() + InsertPos, NewArchiveMember()); + Pos = InsertPos; + for (auto &Member : Members) { + addMember(Ret, Member, Pos); + ++Pos; + } + + return Ret; +} + +static object::Archive::Kind getDefaultForHost() { + return Triple(sys::getProcessTriple()).isOSDarwin() + ? object::Archive::K_DARWIN + : object::Archive::K_GNU; +} + +static object::Archive::Kind getKindFromMember(const NewArchiveMember &Member) { + Expected> OptionalObject = + object::ObjectFile::createObjectFile(Member.Buf->getMemBufferRef()); + + if (OptionalObject) + return isa(**OptionalObject) + ? object::Archive::K_DARWIN + : object::Archive::K_GNU; + + // squelch the error in case we had a non-object file + consumeError(OptionalObject.takeError()); + return getDefaultForHost(); +} + +static void performWriteOperation(ArchiveOperation Operation, + object::Archive *OldArchive, + std::unique_ptr OldArchiveBuf, + std::vector *NewMembersP) { + std::vector NewMembers; + if (!NewMembersP) + NewMembers = computeNewArchiveMembers(Operation, OldArchive); + + object::Archive::Kind Kind; + switch (FormatType) { + case Default: + if (Thin) + Kind = object::Archive::K_GNU; + else if (OldArchive) + Kind = OldArchive->kind(); + else if (NewMembersP) + Kind = NewMembersP->size() ? getKindFromMember(NewMembersP->front()) + : getDefaultForHost(); + else + Kind = NewMembers.size() ? getKindFromMember(NewMembers.front()) + : getDefaultForHost(); + break; + case GNU: + Kind = object::Archive::K_GNU; + break; + case BSD: + if (Thin) + fail("Only the gnu format has a thin mode"); + Kind = object::Archive::K_BSD; + break; + case DARWIN: + if (Thin) + fail("Only the gnu format has a thin mode"); + Kind = object::Archive::K_DARWIN; + break; + case Unknown: + llvm_unreachable(""); + } + + Error E = + writeArchive(ArchiveName, NewMembersP ? *NewMembersP : NewMembers, Symtab, + Kind, Deterministic, Thin, std::move(OldArchiveBuf)); + failIfError(std::move(E), ArchiveName); +} + +static void createSymbolTable(object::Archive *OldArchive) { + // When an archive is created or modified, if the s option is given, the + // resulting archive will have a current symbol table. If the S option + // is given, it will have no symbol table. + // In summary, we only need to update the symbol table if we have none. + // This is actually very common because of broken build systems that think + // they have to run ranlib. + if (OldArchive->hasSymbolTable()) + return; + + performWriteOperation(CreateSymTab, OldArchive, nullptr, nullptr); +} + +static void performOperation(ArchiveOperation Operation, + object::Archive *OldArchive, + std::unique_ptr OldArchiveBuf, + std::vector *NewMembers) { + switch (Operation) { + case Print: + case DisplayTable: + case Extract: + performReadOperation(Operation, OldArchive); + return; + + case Delete: + case Move: + case QuickAppend: + case ReplaceOrInsert: + performWriteOperation(Operation, OldArchive, std::move(OldArchiveBuf), + NewMembers); + return; + case CreateSymTab: + createSymbolTable(OldArchive); + return; + } + llvm_unreachable("Unknown operation."); +} + +static int performOperation(ArchiveOperation Operation, + std::vector *NewMembers) { + // Create or open the archive object. + ErrorOr> Buf = + MemoryBuffer::getFile(ArchiveName, -1, false); + std::error_code EC = Buf.getError(); + if (EC && EC != errc::no_such_file_or_directory) + fail("error opening '" + ArchiveName + "': " + EC.message() + "!"); + + if (!EC) { + Error Err = Error::success(); + object::Archive Archive(Buf.get()->getMemBufferRef(), Err); + EC = errorToErrorCode(std::move(Err)); + failIfError(EC, + "error loading '" + ArchiveName + "': " + EC.message() + "!"); + performOperation(Operation, &Archive, std::move(Buf.get()), NewMembers); + return 0; + } + + assert(EC == errc::no_such_file_or_directory); + + if (!shouldCreateArchive(Operation)) { + failIfError(EC, Twine("error loading '") + ArchiveName + "'"); + } else { + if (!Create) { + // Produce a warning if we should and we're creating the archive + errs() << ToolName << ": creating " << ArchiveName << "\n"; + } + } + + performOperation(Operation, nullptr, nullptr, NewMembers); + return 0; +} + +static void runMRIScript() { + enum class MRICommand { AddLib, AddMod, Create, Delete, Save, End, Invalid }; + + ErrorOr> Buf = MemoryBuffer::getSTDIN(); + failIfError(Buf.getError()); + const MemoryBuffer &Ref = *Buf.get(); + bool Saved = false; + std::vector NewMembers; + + for (line_iterator I(Ref, /*SkipBlanks*/ false), E; I != E; ++I) { + StringRef Line = *I; + Line = Line.split(';').first; + Line = Line.split('*').first; + Line = Line.trim(); + if (Line.empty()) + continue; + StringRef CommandStr, Rest; + std::tie(CommandStr, Rest) = Line.split(' '); + Rest = Rest.trim(); + if (!Rest.empty() && Rest.front() == '"' && Rest.back() == '"') + Rest = Rest.drop_front().drop_back(); + auto Command = StringSwitch(CommandStr.lower()) + .Case("addlib", MRICommand::AddLib) + .Case("addmod", MRICommand::AddMod) + .Case("create", MRICommand::Create) + .Case("delete", MRICommand::Delete) + .Case("save", MRICommand::Save) + .Case("end", MRICommand::End) + .Default(MRICommand::Invalid); + + switch (Command) { + case MRICommand::AddLib: { + object::Archive &Lib = readLibrary(Rest); + { + Error Err = Error::success(); + for (auto &Member : Lib.children(Err)) + addMember(NewMembers, Member); + failIfError(std::move(Err)); + } + break; + } + case MRICommand::AddMod: + addMember(NewMembers, Rest); + break; + case MRICommand::Create: + Create = true; + if (!ArchiveName.empty()) + fail("Editing multiple archives not supported"); + if (Saved) + fail("File already saved"); + ArchiveName = Rest; + break; + case MRICommand::Delete: { + StringRef Name = sys::path::filename(Rest); + llvm::erase_if(NewMembers, + [=](NewArchiveMember &M) { return M.MemberName == Name; }); + break; + } + case MRICommand::Save: + Saved = true; + break; + case MRICommand::End: + break; + case MRICommand::Invalid: + fail("Unknown command: " + CommandStr); + } + } + + // Nothing to do if not saved. + if (Saved) + performOperation(ReplaceOrInsert, &NewMembers); + exit(0); +} + +static bool handleGenericOption(StringRef arg) { + if (arg == "-help" || arg == "--help") { + printHelpMessage(); + return true; + } + if (arg == "-version" || arg == "--version") { + cl::PrintVersionMessage(); + return true; + } + return false; +} + +static int ar_main(int argc, char **argv) { + SmallVector Argv(argv, argv + argc); + BumpPtrAllocator Alloc; + StringSaver Saver(Alloc); + cl::ExpandResponseFiles(Saver, cl::TokenizeGNUCommandLine, Argv); + for (size_t i = 1; i < Argv.size(); ++i) { + StringRef Arg = Argv[i]; + const char *match; + auto MatchFlagWithArg = [&](const char *expected) { + size_t len = strlen(expected); + if (Arg == expected) { + if (++i >= Argv.size()) + fail(std::string(expected) + " requires an argument"); + match = Argv[i]; + return true; + } + if (Arg.startswith(expected) && Arg.size() > len && Arg[len] == '=') { + match = Arg.data() + len + 1; + return true; + } + return false; + }; + if (handleGenericOption(Argv[i])) + return 0; + if (Arg == "--") { + for (; i < Argv.size(); ++i) + PositionalArgs.push_back(Argv[i]); + break; + } + if (Arg[0] == '-') { + if (Arg.startswith("--")) + Arg = Argv[i] + 2; + else + Arg = Argv[i] + 1; + if (Arg == "M") { + MRI = true; + } else if (MatchFlagWithArg("format")) { + FormatType = StringSwitch(match) + .Case("default", Default) + .Case("gnu", GNU) + .Case("darwin", DARWIN) + .Case("bsd", BSD) + .Default(Unknown); + if (FormatType == Unknown) + fail(std::string("Invalid format ") + match); + } else if (MatchFlagWithArg("plugin")) { + // Ignored. + } else { + Options += Argv[i] + 1; + } + } else if (Options.empty()) { + Options += Argv[i]; + } else { + PositionalArgs.push_back(Argv[i]); + } + } + ArchiveOperation Operation = parseCommandLine(); + return performOperation(Operation, nullptr); +} + +static int ranlib_main(int argc, char **argv) { + bool ArchiveSpecified = false; + for (int i = 1; i < argc; ++i) { + if (handleGenericOption(argv[i])) { + return 0; + } else { + if (ArchiveSpecified) + fail("Exactly one archive should be specified"); + ArchiveSpecified = true; + ArchiveName = argv[i]; + } + } + return performOperation(CreateSymTab, nullptr); +} + +int main(int argc, char **argv) { + InitLLVM X(argc, argv); + ToolName = argv[0]; + + llvm::InitializeAllTargetInfos(); + llvm::InitializeAllTargetMCs(); + llvm::InitializeAllAsmParsers(); + + Stem = sys::path::stem(ToolName); + if (Stem.contains_lower("dlltool")) + return dlltoolDriverMain(makeArrayRef(argv, argc)); + + if (Stem.contains_lower("ranlib")) + return ranlib_main(argc, argv); + + if (Stem.contains_lower("lib")) + return libDriverMain(makeArrayRef(argv, argc)); + + if (Stem.contains_lower("ar")) + return ar_main(argc, argv); + fail("Not ranlib, ar, lib or dlltool!"); +}