1 //===-- llvm-ar.cpp - LLVM archive librarian utility ----------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Builds up (relatively) standard unix archive files (.a) containing LLVM
11 // bitcode or other files.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/ADT/StringSwitch.h"
16 #include "llvm/IR/LLVMContext.h"
17 #include "llvm/IR/Module.h"
18 #include "llvm/Object/Archive.h"
19 #include "llvm/Object/ObjectFile.h"
20 #include "llvm/Support/CommandLine.h"
21 #include "llvm/Support/Errc.h"
22 #include "llvm/Support/FileSystem.h"
23 #include "llvm/Support/Format.h"
24 #include "llvm/Support/LineIterator.h"
25 #include "llvm/Support/ManagedStatic.h"
26 #include "llvm/Support/MemoryBuffer.h"
27 #include "llvm/Support/PrettyStackTrace.h"
28 #include "llvm/Support/Signals.h"
29 #include "llvm/Support/TargetSelect.h"
30 #include "llvm/Support/ToolOutputFile.h"
31 #include "llvm/Support/raw_ostream.h"
36 #if !defined(_MSC_VER) && !defined(__MINGW32__)
44 // The name this program was invoked as.
45 static StringRef ToolName;
47 static const char *TemporaryOutput;
48 static int TmpArchiveFD = -1;
50 // fail - Show the error message and exit.
51 LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) {
52 outs() << ToolName << ": " << Error << ".\n";
53 if (TmpArchiveFD != -1)
56 sys::fs::remove(TemporaryOutput);
60 static void failIfError(std::error_code EC, Twine Context = "") {
64 std::string ContextStr = Context.str();
67 fail(Context + ": " + EC.message());
70 // llvm-ar/llvm-ranlib remaining positional arguments.
71 static cl::list<std::string>
72 RestOfArgs(cl::Positional, cl::ZeroOrMore,
73 cl::desc("[relpos] [count] <archive-file> [members]..."));
75 static cl::opt<bool> MRI("M", cl::desc(""));
79 // MoreHelp - Provide additional help output explaining the operations and
80 // modifiers of llvm-ar. This object instructs the CommandLine library
81 // to print the text of the constructor when the --help option is given.
82 static cl::extrahelp MoreHelp(
84 " d[NsS] - delete file(s) from the archive\n"
85 " m[abiSs] - move file(s) in the archive\n"
86 " p[kN] - print file(s) found in the archive\n"
87 " q[ufsS] - quick append file(s) to the archive\n"
88 " r[abfiuRsS] - replace or insert file(s) into the archive\n"
89 " t - display contents of archive\n"
90 " x[No] - extract file(s) from the archive\n"
91 "\nMODIFIERS (operation specific):\n"
92 " [a] - put file(s) after [relpos]\n"
93 " [b] - put file(s) before [relpos] (same as [i])\n"
94 " [i] - put file(s) before [relpos] (same as [b])\n"
95 " [N] - use instance [count] of name\n"
96 " [o] - preserve original dates\n"
97 " [s] - create an archive index (cf. ranlib)\n"
98 " [S] - do not build a symbol table\n"
99 " [u] - update only files newer than archive contents\n"
100 "\nMODIFIERS (generic):\n"
101 " [c] - do not warn if the library had to be created\n"
102 " [v] - be verbose about actions taken\n"
105 // This enumeration delineates the kinds of operations on an archive
106 // that are permitted.
107 enum ArchiveOperation {
108 Print, ///< Print the contents of the archive
109 Delete, ///< Delete the specified members
110 Move, ///< Move members to end or as given by {a,b,i} modifiers
111 QuickAppend, ///< Quickly append to end of archive
112 ReplaceOrInsert, ///< Replace or Insert members
113 DisplayTable, ///< Display the table of contents
114 Extract, ///< Extract files back to file system
115 CreateSymTab ///< Create a symbol table in an existing archive
118 // Modifiers to follow operation to vary behavior
119 static bool AddAfter = false; ///< 'a' modifier
120 static bool AddBefore = false; ///< 'b' modifier
121 static bool Create = false; ///< 'c' modifier
122 static bool OriginalDates = false; ///< 'o' modifier
123 static bool OnlyUpdate = false; ///< 'u' modifier
124 static bool Verbose = false; ///< 'v' modifier
125 static bool Symtab = true; ///< 's' modifier
127 // Relative Positional Argument (for insert/move). This variable holds
128 // the name of the archive member to which the 'a', 'b' or 'i' modifier
129 // refers. Only one of 'a', 'b' or 'i' can be specified so we only need
131 static std::string RelPos;
133 // This variable holds the name of the archive file as given on the
135 static std::string ArchiveName;
137 // This variable holds the list of member files to proecess, as given
138 // on the command line.
139 static std::vector<std::string> Members;
141 // show_help - Show the error message, the help message and exit.
142 LLVM_ATTRIBUTE_NORETURN static void
143 show_help(const std::string &msg) {
144 errs() << ToolName << ": " << msg << "\n\n";
145 cl::PrintHelpMessage();
149 // getRelPos - Extract the member filename from the command line for
150 // the [relpos] argument associated with a, b, and i modifiers
151 static void getRelPos() {
152 if(RestOfArgs.size() == 0)
153 show_help("Expected [relpos] for a, b, or i modifier");
154 RelPos = RestOfArgs[0];
155 RestOfArgs.erase(RestOfArgs.begin());
158 static void getOptions() {
159 if(RestOfArgs.size() == 0)
160 show_help("Expected options");
161 Options = RestOfArgs[0];
162 RestOfArgs.erase(RestOfArgs.begin());
165 // getArchive - Get the archive file name from the command line
166 static void getArchive() {
167 if(RestOfArgs.size() == 0)
168 show_help("An archive name must be specified");
169 ArchiveName = RestOfArgs[0];
170 RestOfArgs.erase(RestOfArgs.begin());
173 // getMembers - Copy over remaining items in RestOfArgs to our Members vector
174 // This is just for clarity.
175 static void getMembers() {
176 if(RestOfArgs.size() > 0)
177 Members = std::vector<std::string>(RestOfArgs);
181 enum class MRICommand { AddMod, Create, Save, End, Invalid };
184 static ArchiveOperation parseMRIScript() {
185 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf = MemoryBuffer::getSTDIN();
186 failIfError(Buf.getError());
187 const MemoryBuffer &Ref = *Buf.get();
190 for (line_iterator I(Ref, /*SkipBlanks*/ true, ';'), E; I != E; ++I) {
192 StringRef CommandStr, Rest;
193 std::tie(CommandStr, Rest) = Line.split(' ');
194 auto Command = StringSwitch<MRICommand>(CommandStr.lower())
195 .Case("addmod", MRICommand::AddMod)
196 .Case("create", MRICommand::Create)
197 .Case("save", MRICommand::Save)
198 .Case("end", MRICommand::End)
199 .Default(MRICommand::Invalid);
202 case MRICommand::AddMod:
203 Members.push_back(Rest);
205 case MRICommand::Create:
207 if (!ArchiveName.empty())
208 fail("Editing multiple archives not supported");
210 fail("File already saved");
213 case MRICommand::Save:
216 case MRICommand::End:
218 case MRICommand::Invalid:
219 fail("Unknown command: " + CommandStr);
223 // Nothing to do if not saved.
226 return ReplaceOrInsert;
229 // parseCommandLine - Parse the command line options as presented and return the
230 // operation specified. Process all modifiers and check to make sure that
231 // constraints on modifier/operation pairs have not been violated.
232 static ArchiveOperation parseCommandLine() {
234 if (!RestOfArgs.empty())
235 fail("Cannot mix -M and other options");
236 return parseMRIScript();
241 // Keep track of number of operations. We can only specify one
243 unsigned NumOperations = 0;
245 // Keep track of the number of positional modifiers (a,b,i). Only
246 // one can be specified.
247 unsigned NumPositional = 0;
249 // Keep track of which operation was requested
250 ArchiveOperation Operation;
252 bool MaybeJustCreateSymTab = false;
254 for(unsigned i=0; i<Options.size(); ++i) {
256 case 'd': ++NumOperations; Operation = Delete; break;
257 case 'm': ++NumOperations; Operation = Move ; break;
258 case 'p': ++NumOperations; Operation = Print; break;
259 case 'q': ++NumOperations; Operation = QuickAppend; break;
260 case 'r': ++NumOperations; Operation = ReplaceOrInsert; break;
261 case 't': ++NumOperations; Operation = DisplayTable; break;
262 case 'x': ++NumOperations; Operation = Extract; break;
263 case 'c': Create = true; break;
264 case 'l': /* accepted but unused */ break;
265 case 'o': OriginalDates = true; break;
268 MaybeJustCreateSymTab = true;
273 case 'u': OnlyUpdate = true; break;
274 case 'v': Verbose = true; break;
291 cl::PrintHelpMessage();
295 // At this point, the next thing on the command line must be
299 // Everything on the command line at this point is a member.
302 if (NumOperations == 0 && MaybeJustCreateSymTab) {
304 Operation = CreateSymTab;
305 if (!Members.empty())
306 show_help("The s operation takes only an archive as argument");
309 // Perform various checks on the operation/modifier specification
310 // to make sure we are dealing with a legal request.
311 if (NumOperations == 0)
312 show_help("You must specify at least one of the operations");
313 if (NumOperations > 1)
314 show_help("Only one operation may be specified");
315 if (NumPositional > 1)
316 show_help("You may only specify one of a, b, and i modifiers");
317 if (AddAfter || AddBefore) {
318 if (Operation != Move && Operation != ReplaceOrInsert)
319 show_help("The 'a', 'b' and 'i' modifiers can only be specified with "
320 "the 'm' or 'r' operations");
322 if (OriginalDates && Operation != Extract)
323 show_help("The 'o' modifier is only applicable to the 'x' operation");
324 if (OnlyUpdate && Operation != ReplaceOrInsert)
325 show_help("The 'u' modifier is only applicable to the 'r' operation");
327 // Return the parsed operation to the caller
331 // Implements the 'p' operation. This function traverses the archive
332 // looking for members that match the path list.
333 static void doPrint(StringRef Name, object::Archive::child_iterator I) {
335 outs() << "Printing " << Name << "\n";
337 StringRef Data = I->getBuffer();
338 outs().write(Data.data(), Data.size());
341 // putMode - utility function for printing out the file mode when the 't'
342 // operation is in verbose mode.
343 static void printMode(unsigned mode) {
358 // Implement the 't' operation. This function prints out just
359 // the file names of each of the members. However, if verbose mode is requested
360 // ('v' modifier) then the file type, permission mode, user, group, size, and
361 // modification time are also printed.
362 static void doDisplayTable(StringRef Name, object::Archive::child_iterator I) {
364 sys::fs::perms Mode = I->getAccessMode();
365 printMode((Mode >> 6) & 007);
366 printMode((Mode >> 3) & 007);
367 printMode(Mode & 007);
368 outs() << ' ' << I->getUID();
369 outs() << '/' << I->getGID();
370 outs() << ' ' << format("%6llu", I->getSize());
371 outs() << ' ' << I->getLastModified().str();
374 outs() << Name << "\n";
377 // Implement the 'x' operation. This function extracts files back to the file
379 static void doExtract(StringRef Name, object::Archive::child_iterator I) {
380 // Retain the original mode.
381 sys::fs::perms Mode = I->getAccessMode();
382 SmallString<128> Storage = Name;
386 sys::fs::openFileForWrite(Storage.c_str(), FD, sys::fs::F_None, Mode),
390 raw_fd_ostream file(FD, false);
392 // Get the data and its length
393 StringRef Data = I->getBuffer();
396 file.write(Data.data(), Data.size());
399 // If we're supposed to retain the original modification times, etc. do so
403 sys::fs::setLastModificationAndAccessTime(FD, I->getLastModified()));
406 fail("Could not close the file");
409 static bool shouldCreateArchive(ArchiveOperation Op) {
420 case ReplaceOrInsert:
424 llvm_unreachable("Missing entry in covered switch.");
427 static void performReadOperation(ArchiveOperation Operation,
428 object::Archive *OldArchive) {
429 for (object::Archive::child_iterator I = OldArchive->child_begin(),
430 E = OldArchive->child_end();
432 ErrorOr<StringRef> NameOrErr = I->getName();
433 failIfError(NameOrErr.getError());
434 StringRef Name = NameOrErr.get();
436 if (!Members.empty() &&
437 std::find(Members.begin(), Members.end(), Name) == Members.end())
442 llvm_unreachable("Not a read operation");
447 doDisplayTable(Name, I);
457 class NewArchiveIterator {
461 object::Archive::child_iterator OldI;
463 std::string NewFilename;
465 mutable sys::fs::file_status NewStatus;
468 NewArchiveIterator(object::Archive::child_iterator I, StringRef Name);
469 NewArchiveIterator(std::string *I, StringRef Name);
470 NewArchiveIterator();
471 bool isNewMember() const;
472 StringRef getName() const;
474 object::Archive::child_iterator getOld() const;
476 const char *getNew() const;
478 const sys::fs::file_status &getStatus() const;
482 NewArchiveIterator::NewArchiveIterator() {}
484 NewArchiveIterator::NewArchiveIterator(object::Archive::child_iterator I,
486 : IsNewMember(false), Name(Name), OldI(I) {}
488 NewArchiveIterator::NewArchiveIterator(std::string *NewFilename, StringRef Name)
489 : IsNewMember(true), Name(Name), NewFilename(*NewFilename), NewFD(-1) {}
491 StringRef NewArchiveIterator::getName() const { return Name; }
493 bool NewArchiveIterator::isNewMember() const { return IsNewMember; }
495 object::Archive::child_iterator NewArchiveIterator::getOld() const {
496 assert(!IsNewMember);
500 const char *NewArchiveIterator::getNew() const {
502 return NewFilename.c_str();
505 int NewArchiveIterator::getFD() const {
509 failIfError(sys::fs::openFileForRead(NewFilename, NewFD), NewFilename);
512 failIfError(sys::fs::status(NewFD, NewStatus), NewFilename);
514 // Opening a directory doesn't make sense. Let it fail.
515 // Linux cannot open directories with open(2), although
516 // cygwin and *bsd can.
517 if (NewStatus.type() == sys::fs::file_type::directory_file)
518 failIfError(make_error_code(errc::is_a_directory), NewFilename);
523 const sys::fs::file_status &NewArchiveIterator::getStatus() const {
525 assert(NewFD != -1 && "Must call getFD first");
529 template <typename T>
530 void addMember(std::vector<NewArchiveIterator> &Members, T I, StringRef Name,
532 NewArchiveIterator NI(I, Name);
534 Members.push_back(NI);
548 computeInsertAction(ArchiveOperation Operation,
549 object::Archive::child_iterator I, StringRef Name,
550 std::vector<std::string>::iterator &Pos) {
551 if (Operation == QuickAppend || Members.empty())
552 return IA_AddOldMember;
554 std::vector<std::string>::iterator MI = std::find_if(
555 Members.begin(), Members.end(),
556 [Name](StringRef Path) { return Name == sys::path::filename(Path); });
558 if (MI == Members.end())
559 return IA_AddOldMember;
563 if (Operation == Delete)
566 if (Operation == Move)
567 return IA_MoveOldMember;
569 if (Operation == ReplaceOrInsert) {
570 StringRef PosName = sys::path::filename(RelPos);
573 return IA_AddNewMeber;
574 return IA_MoveNewMember;
577 // We could try to optimize this to a fstat, but it is not a common
579 sys::fs::file_status Status;
580 failIfError(sys::fs::status(*MI, Status), *MI);
581 if (Status.getLastModificationTime() < I->getLastModified()) {
583 return IA_AddOldMember;
584 return IA_MoveOldMember;
588 return IA_AddNewMeber;
589 return IA_MoveNewMember;
591 llvm_unreachable("No such operation");
594 // We have to walk this twice and computing it is not trivial, so creating an
595 // explicit std::vector is actually fairly efficient.
596 static std::vector<NewArchiveIterator>
597 computeNewArchiveMembers(ArchiveOperation Operation,
598 object::Archive *OldArchive) {
599 std::vector<NewArchiveIterator> Ret;
600 std::vector<NewArchiveIterator> Moved;
602 StringRef PosName = sys::path::filename(RelPos);
604 for (object::Archive::child_iterator I = OldArchive->child_begin(),
605 E = OldArchive->child_end();
607 int Pos = Ret.size();
608 ErrorOr<StringRef> NameOrErr = I->getName();
609 failIfError(NameOrErr.getError());
610 StringRef Name = NameOrErr.get();
611 if (Name == PosName) {
612 assert(AddAfter || AddBefore);
619 std::vector<std::string>::iterator MemberI = Members.end();
620 InsertAction Action = computeInsertAction(Operation, I, Name, MemberI);
622 case IA_AddOldMember:
623 addMember(Ret, I, Name);
626 addMember(Ret, &*MemberI, Name);
630 case IA_MoveOldMember:
631 addMember(Moved, I, Name);
633 case IA_MoveNewMember:
634 addMember(Moved, &*MemberI, Name);
637 if (MemberI != Members.end())
638 Members.erase(MemberI);
642 if (Operation == Delete)
645 if (!RelPos.empty() && InsertPos == -1)
646 fail("Insertion point not found");
649 InsertPos = Ret.size();
651 assert(unsigned(InsertPos) <= Ret.size());
652 Ret.insert(Ret.begin() + InsertPos, Moved.begin(), Moved.end());
654 Ret.insert(Ret.begin() + InsertPos, Members.size(), NewArchiveIterator());
656 for (std::vector<std::string>::iterator I = Members.begin(),
658 I != E; ++I, ++Pos) {
659 StringRef Name = sys::path::filename(*I);
660 addMember(Ret, &*I, Name, Pos);
666 template <typename T>
667 static void printWithSpacePadding(raw_fd_ostream &OS, T Data, unsigned Size,
668 bool MayTruncate = false) {
669 uint64_t OldPos = OS.tell();
671 unsigned SizeSoFar = OS.tell() - OldPos;
672 if (Size > SizeSoFar) {
673 unsigned Remaining = Size - SizeSoFar;
674 for (unsigned I = 0; I < Remaining; ++I)
676 } else if (Size < SizeSoFar) {
677 assert(MayTruncate && "Data doesn't fit in Size");
678 // Some of the data this is used for (like UID) can be larger than the
679 // space available in the archive format. Truncate in that case.
680 OS.seek(OldPos + Size);
684 static void print32BE(raw_fd_ostream &Out, unsigned Val) {
685 for (int I = 3; I >= 0; --I) {
686 char V = (Val >> (8 * I)) & 0xff;
691 static void printRestOfMemberHeader(raw_fd_ostream &Out,
692 const sys::TimeValue &ModTime, unsigned UID,
693 unsigned GID, unsigned Perms,
695 printWithSpacePadding(Out, ModTime.toEpochTime(), 12);
696 printWithSpacePadding(Out, UID, 6, true);
697 printWithSpacePadding(Out, GID, 6, true);
698 printWithSpacePadding(Out, format("%o", Perms), 8);
699 printWithSpacePadding(Out, Size, 10);
703 static void printMemberHeader(raw_fd_ostream &Out, StringRef Name,
704 const sys::TimeValue &ModTime, unsigned UID,
705 unsigned GID, unsigned Perms, unsigned Size) {
706 printWithSpacePadding(Out, Twine(Name) + "/", 16);
707 printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
710 static void printMemberHeader(raw_fd_ostream &Out, unsigned NameOffset,
711 const sys::TimeValue &ModTime, unsigned UID,
712 unsigned GID, unsigned Perms, unsigned Size) {
714 printWithSpacePadding(Out, NameOffset, 15);
715 printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
718 static void writeStringTable(raw_fd_ostream &Out,
719 ArrayRef<NewArchiveIterator> Members,
720 std::vector<unsigned> &StringMapIndexes) {
721 unsigned StartOffset = 0;
722 for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
725 StringRef Name = I->getName();
726 if (Name.size() < 16)
728 if (StartOffset == 0) {
729 printWithSpacePadding(Out, "//", 58);
731 StartOffset = Out.tell();
733 StringMapIndexes.push_back(Out.tell() - StartOffset);
734 Out << Name << "/\n";
736 if (StartOffset == 0)
740 int Pos = Out.tell();
741 Out.seek(StartOffset - 12);
742 printWithSpacePadding(Out, Pos - StartOffset, 10);
747 writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
748 ArrayRef<MemoryBufferRef> Buffers,
749 std::vector<std::pair<unsigned, unsigned>> &MemberOffsetRefs) {
750 unsigned StartOffset = 0;
751 unsigned MemberNum = 0;
753 raw_string_ostream NameOS(NameBuf);
754 unsigned NumSyms = 0;
755 LLVMContext &Context = getGlobalContext();
756 for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
758 I != E; ++I, ++MemberNum) {
759 MemoryBufferRef MemberBuffer = Buffers[MemberNum];
760 ErrorOr<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
761 object::SymbolicFile::createSymbolicFile(
762 MemberBuffer, sys::fs::file_magic::unknown, &Context);
764 continue; // FIXME: check only for "not an object file" errors.
765 object::SymbolicFile &Obj = *ObjOrErr.get();
768 printMemberHeader(Out, "", sys::TimeValue::now(), 0, 0, 0, 0);
769 StartOffset = Out.tell();
773 for (const object::BasicSymbolRef &S : Obj.symbols()) {
774 uint32_t Symflags = S.getFlags();
775 if (Symflags & object::SymbolRef::SF_FormatSpecific)
777 if (!(Symflags & object::SymbolRef::SF_Global))
779 if (Symflags & object::SymbolRef::SF_Undefined)
781 failIfError(S.printName(NameOS));
784 MemberOffsetRefs.push_back(std::make_pair(Out.tell(), MemberNum));
790 if (StartOffset == 0)
796 unsigned Pos = Out.tell();
797 Out.seek(StartOffset - 12);
798 printWithSpacePadding(Out, Pos - StartOffset, 10);
799 Out.seek(StartOffset);
800 print32BE(Out, NumSyms);
804 static void performWriteOperation(ArchiveOperation Operation,
805 object::Archive *OldArchive) {
806 SmallString<128> TmpArchive;
807 failIfError(sys::fs::createUniqueFile(ArchiveName + ".temp-archive-%%%%%%%.a",
808 TmpArchiveFD, TmpArchive));
810 TemporaryOutput = TmpArchive.c_str();
811 tool_output_file Output(TemporaryOutput, TmpArchiveFD);
812 raw_fd_ostream &Out = Output.os();
815 std::vector<NewArchiveIterator> NewMembers =
816 computeNewArchiveMembers(Operation, OldArchive);
818 std::vector<std::pair<unsigned, unsigned> > MemberOffsetRefs;
820 std::vector<std::unique_ptr<MemoryBuffer>> Buffers;
821 std::vector<MemoryBufferRef> Members;
823 for (unsigned I = 0, N = NewMembers.size(); I < N; ++I) {
824 NewArchiveIterator &Member = NewMembers[I];
825 MemoryBufferRef MemberRef;
827 if (Member.isNewMember()) {
828 const char *Filename = Member.getNew();
829 int FD = Member.getFD();
830 const sys::fs::file_status &Status = Member.getStatus();
831 ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
832 MemoryBuffer::getOpenFile(FD, Filename, Status.getSize(), false);
833 failIfError(MemberBufferOrErr.getError(), Filename);
834 Buffers.push_back(std::move(MemberBufferOrErr.get()));
835 MemberRef = Buffers.back()->getMemBufferRef();
837 object::Archive::child_iterator OldMember = Member.getOld();
838 ErrorOr<MemoryBufferRef> MemberBufferOrErr =
839 OldMember->getMemoryBufferRef();
840 failIfError(MemberBufferOrErr.getError());
841 MemberRef = MemberBufferOrErr.get();
843 Members.push_back(MemberRef);
847 writeSymbolTable(Out, NewMembers, Members, MemberOffsetRefs);
850 std::vector<unsigned> StringMapIndexes;
851 writeStringTable(Out, NewMembers, StringMapIndexes);
853 std::vector<std::pair<unsigned, unsigned> >::iterator MemberRefsI =
854 MemberOffsetRefs.begin();
856 unsigned MemberNum = 0;
857 unsigned LongNameMemberNum = 0;
858 for (std::vector<NewArchiveIterator>::iterator I = NewMembers.begin(),
859 E = NewMembers.end();
860 I != E; ++I, ++MemberNum) {
862 unsigned Pos = Out.tell();
863 while (MemberRefsI != MemberOffsetRefs.end() &&
864 MemberRefsI->second == MemberNum) {
865 Out.seek(MemberRefsI->first);
871 MemoryBufferRef File = Members[MemberNum];
872 if (I->isNewMember()) {
873 const char *FileName = I->getNew();
874 const sys::fs::file_status &Status = I->getStatus();
876 StringRef Name = sys::path::filename(FileName);
877 if (Name.size() < 16)
878 printMemberHeader(Out, Name, Status.getLastModificationTime(),
879 Status.getUser(), Status.getGroup(),
880 Status.permissions(), Status.getSize());
882 printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
883 Status.getLastModificationTime(), Status.getUser(),
884 Status.getGroup(), Status.permissions(),
887 object::Archive::child_iterator OldMember = I->getOld();
888 StringRef Name = I->getName();
890 if (Name.size() < 16)
891 printMemberHeader(Out, Name, OldMember->getLastModified(),
892 OldMember->getUID(), OldMember->getGID(),
893 OldMember->getAccessMode(), OldMember->getSize());
895 printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
896 OldMember->getLastModified(), OldMember->getUID(),
897 OldMember->getGID(), OldMember->getAccessMode(),
898 OldMember->getSize());
901 Out << File.getBuffer();
909 sys::fs::rename(TemporaryOutput, ArchiveName);
910 TemporaryOutput = nullptr;
913 static void createSymbolTable(object::Archive *OldArchive) {
914 // When an archive is created or modified, if the s option is given, the
915 // resulting archive will have a current symbol table. If the S option
916 // is given, it will have no symbol table.
917 // In summary, we only need to update the symbol table if we have none.
918 // This is actually very common because of broken build systems that think
919 // they have to run ranlib.
920 if (OldArchive->hasSymbolTable())
923 performWriteOperation(CreateSymTab, OldArchive);
926 static void performOperation(ArchiveOperation Operation,
927 object::Archive *OldArchive) {
932 performReadOperation(Operation, OldArchive);
938 case ReplaceOrInsert:
939 performWriteOperation(Operation, OldArchive);
942 createSymbolTable(OldArchive);
945 llvm_unreachable("Unknown operation.");
948 static int ar_main(char **argv);
949 static int ranlib_main();
951 // main - main program for llvm-ar .. see comments in the code
952 int main(int argc, char **argv) {
954 // Print a stack trace if we signal out.
955 sys::PrintStackTraceOnErrorSignal();
956 PrettyStackTraceProgram X(argc, argv);
957 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
959 // Have the command line options parsed and handle things
960 // like --help and --version.
961 cl::ParseCommandLineOptions(argc, argv,
962 "LLVM Archiver (llvm-ar)\n\n"
963 " This program archives bitcode files into single libraries\n"
966 llvm::InitializeAllTargetInfos();
967 llvm::InitializeAllTargetMCs();
968 llvm::InitializeAllAsmParsers();
970 StringRef Stem = sys::path::stem(ToolName);
971 if (Stem.find("ar") != StringRef::npos)
972 return ar_main(argv);
973 if (Stem.find("ranlib") != StringRef::npos)
974 return ranlib_main();
975 fail("Not ranlib or ar!");
978 static int performOperation(ArchiveOperation Operation);
981 if (RestOfArgs.size() != 1)
982 fail(ToolName + "takes just one archive as argument");
983 ArchiveName = RestOfArgs[0];
984 return performOperation(CreateSymTab);
987 int ar_main(char **argv) {
988 // Do our own parsing of the command line because the CommandLine utility
989 // can't handle the grouped positional parameters without a dash.
990 ArchiveOperation Operation = parseCommandLine();
991 return performOperation(Operation);
994 static int performOperation(ArchiveOperation Operation) {
995 // Create or open the archive object.
996 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
997 MemoryBuffer::getFile(ArchiveName, -1, false);
998 std::error_code EC = Buf.getError();
999 if (EC && EC != errc::no_such_file_or_directory) {
1000 errs() << ToolName << ": error opening '" << ArchiveName
1001 << "': " << EC.message() << "!\n";
1006 object::Archive Archive(Buf.get()->getMemBufferRef(), EC);
1009 errs() << ToolName << ": error loading '" << ArchiveName
1010 << "': " << EC.message() << "!\n";
1013 performOperation(Operation, &Archive);
1017 assert(EC == errc::no_such_file_or_directory);
1019 if (!shouldCreateArchive(Operation)) {
1020 failIfError(EC, Twine("error loading '") + ArchiveName + "'");
1023 // Produce a warning if we should and we're creating the archive
1024 errs() << ToolName << ": creating " << ArchiveName << "\n";
1028 performOperation(Operation, nullptr);