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 // 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 // Provide additional help output explaining the operations and modifiers of
80 // llvm-ar. This object instructs the CommandLine library to print the text of
81 // 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 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 // Extract the member filename from the command line for the [relpos] argument
150 // 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 // 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 // Copy over remaining items in RestOfArgs to our Members vector
174 static void getMembers() {
175 if(RestOfArgs.size() > 0)
176 Members = std::vector<std::string>(RestOfArgs);
180 enum class MRICommand { AddMod, Create, Save, End, Invalid };
183 static ArchiveOperation parseMRIScript() {
184 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf = MemoryBuffer::getSTDIN();
185 failIfError(Buf.getError());
186 const MemoryBuffer &Ref = *Buf.get();
189 for (line_iterator I(Ref, /*SkipBlanks*/ true, ';'), E; I != E; ++I) {
191 StringRef CommandStr, Rest;
192 std::tie(CommandStr, Rest) = Line.split(' ');
193 auto Command = StringSwitch<MRICommand>(CommandStr.lower())
194 .Case("addmod", MRICommand::AddMod)
195 .Case("create", MRICommand::Create)
196 .Case("save", MRICommand::Save)
197 .Case("end", MRICommand::End)
198 .Default(MRICommand::Invalid);
201 case MRICommand::AddMod:
202 Members.push_back(Rest);
204 case MRICommand::Create:
206 if (!ArchiveName.empty())
207 fail("Editing multiple archives not supported");
209 fail("File already saved");
212 case MRICommand::Save:
215 case MRICommand::End:
217 case MRICommand::Invalid:
218 fail("Unknown command: " + CommandStr);
222 // Nothing to do if not saved.
225 return ReplaceOrInsert;
228 // Parse the command line options as presented and return the operation
229 // specified. Process all modifiers and check to make sure that constraints on
230 // modifier/operation pairs have not been violated.
231 static ArchiveOperation parseCommandLine() {
233 if (!RestOfArgs.empty())
234 fail("Cannot mix -M and other options");
235 return parseMRIScript();
240 // Keep track of number of operations. We can only specify one
242 unsigned NumOperations = 0;
244 // Keep track of the number of positional modifiers (a,b,i). Only
245 // one can be specified.
246 unsigned NumPositional = 0;
248 // Keep track of which operation was requested
249 ArchiveOperation Operation;
251 bool MaybeJustCreateSymTab = false;
253 for(unsigned i=0; i<Options.size(); ++i) {
255 case 'd': ++NumOperations; Operation = Delete; break;
256 case 'm': ++NumOperations; Operation = Move ; break;
257 case 'p': ++NumOperations; Operation = Print; break;
258 case 'q': ++NumOperations; Operation = QuickAppend; break;
259 case 'r': ++NumOperations; Operation = ReplaceOrInsert; break;
260 case 't': ++NumOperations; Operation = DisplayTable; break;
261 case 'x': ++NumOperations; Operation = Extract; break;
262 case 'c': Create = true; break;
263 case 'l': /* accepted but unused */ break;
264 case 'o': OriginalDates = true; break;
267 MaybeJustCreateSymTab = true;
272 case 'u': OnlyUpdate = true; break;
273 case 'v': Verbose = true; break;
290 cl::PrintHelpMessage();
294 // At this point, the next thing on the command line must be
298 // Everything on the command line at this point is a member.
301 if (NumOperations == 0 && MaybeJustCreateSymTab) {
303 Operation = CreateSymTab;
304 if (!Members.empty())
305 show_help("The s operation takes only an archive as argument");
308 // Perform various checks on the operation/modifier specification
309 // to make sure we are dealing with a legal request.
310 if (NumOperations == 0)
311 show_help("You must specify at least one of the operations");
312 if (NumOperations > 1)
313 show_help("Only one operation may be specified");
314 if (NumPositional > 1)
315 show_help("You may only specify one of a, b, and i modifiers");
316 if (AddAfter || AddBefore) {
317 if (Operation != Move && Operation != ReplaceOrInsert)
318 show_help("The 'a', 'b' and 'i' modifiers can only be specified with "
319 "the 'm' or 'r' operations");
321 if (OriginalDates && Operation != Extract)
322 show_help("The 'o' modifier is only applicable to the 'x' operation");
323 if (OnlyUpdate && Operation != ReplaceOrInsert)
324 show_help("The 'u' modifier is only applicable to the 'r' operation");
326 // Return the parsed operation to the caller
330 // Implements the 'p' operation. This function traverses the archive
331 // looking for members that match the path list.
332 static void doPrint(StringRef Name, object::Archive::child_iterator I) {
334 outs() << "Printing " << Name << "\n";
336 StringRef Data = I->getBuffer();
337 outs().write(Data.data(), Data.size());
340 // Utility function for printing out the file mode when the 't' operation is in
342 static void printMode(unsigned mode) {
357 // Implement the 't' operation. This function prints out just
358 // the file names of each of the members. However, if verbose mode is requested
359 // ('v' modifier) then the file type, permission mode, user, group, size, and
360 // modification time are also printed.
361 static void doDisplayTable(StringRef Name, object::Archive::child_iterator I) {
363 sys::fs::perms Mode = I->getAccessMode();
364 printMode((Mode >> 6) & 007);
365 printMode((Mode >> 3) & 007);
366 printMode(Mode & 007);
367 outs() << ' ' << I->getUID();
368 outs() << '/' << I->getGID();
369 outs() << ' ' << format("%6llu", I->getSize());
370 outs() << ' ' << I->getLastModified().str();
373 outs() << Name << "\n";
376 // Implement the 'x' operation. This function extracts files back to the file
378 static void doExtract(StringRef Name, object::Archive::child_iterator I) {
379 // Retain the original mode.
380 sys::fs::perms Mode = I->getAccessMode();
381 SmallString<128> Storage = Name;
385 sys::fs::openFileForWrite(Storage.c_str(), FD, sys::fs::F_None, Mode),
389 raw_fd_ostream file(FD, false);
391 // Get the data and its length
392 StringRef Data = I->getBuffer();
395 file.write(Data.data(), Data.size());
398 // If we're supposed to retain the original modification times, etc. do so
402 sys::fs::setLastModificationAndAccessTime(FD, I->getLastModified()));
405 fail("Could not close the file");
408 static bool shouldCreateArchive(ArchiveOperation Op) {
419 case ReplaceOrInsert:
423 llvm_unreachable("Missing entry in covered switch.");
426 static void performReadOperation(ArchiveOperation Operation,
427 object::Archive *OldArchive) {
428 for (object::Archive::child_iterator I = OldArchive->child_begin(),
429 E = OldArchive->child_end();
431 ErrorOr<StringRef> NameOrErr = I->getName();
432 failIfError(NameOrErr.getError());
433 StringRef Name = NameOrErr.get();
435 if (!Members.empty() &&
436 std::find(Members.begin(), Members.end(), Name) == Members.end())
441 llvm_unreachable("Not a read operation");
446 doDisplayTable(Name, I);
456 class NewArchiveIterator {
460 object::Archive::child_iterator OldI;
462 std::string NewFilename;
464 mutable sys::fs::file_status NewStatus;
467 NewArchiveIterator(object::Archive::child_iterator I, StringRef Name);
468 NewArchiveIterator(std::string *I, StringRef Name);
469 NewArchiveIterator();
470 bool isNewMember() const;
471 StringRef getName() const;
473 object::Archive::child_iterator getOld() const;
475 const char *getNew() const;
477 const sys::fs::file_status &getStatus() const;
481 NewArchiveIterator::NewArchiveIterator() {}
483 NewArchiveIterator::NewArchiveIterator(object::Archive::child_iterator I,
485 : IsNewMember(false), Name(Name), OldI(I) {}
487 NewArchiveIterator::NewArchiveIterator(std::string *NewFilename, StringRef Name)
488 : IsNewMember(true), Name(Name), NewFilename(*NewFilename), NewFD(-1) {}
490 StringRef NewArchiveIterator::getName() const { return Name; }
492 bool NewArchiveIterator::isNewMember() const { return IsNewMember; }
494 object::Archive::child_iterator NewArchiveIterator::getOld() const {
495 assert(!IsNewMember);
499 const char *NewArchiveIterator::getNew() const {
501 return NewFilename.c_str();
504 int NewArchiveIterator::getFD() const {
508 failIfError(sys::fs::openFileForRead(NewFilename, NewFD), NewFilename);
511 failIfError(sys::fs::status(NewFD, NewStatus), NewFilename);
513 // Opening a directory doesn't make sense. Let it fail.
514 // Linux cannot open directories with open(2), although
515 // cygwin and *bsd can.
516 if (NewStatus.type() == sys::fs::file_type::directory_file)
517 failIfError(make_error_code(errc::is_a_directory), NewFilename);
522 const sys::fs::file_status &NewArchiveIterator::getStatus() const {
524 assert(NewFD != -1 && "Must call getFD first");
528 template <typename T>
529 void addMember(std::vector<NewArchiveIterator> &Members, T I, StringRef Name,
531 NewArchiveIterator NI(I, Name);
533 Members.push_back(NI);
547 computeInsertAction(ArchiveOperation Operation,
548 object::Archive::child_iterator I, StringRef Name,
549 std::vector<std::string>::iterator &Pos) {
550 if (Operation == QuickAppend || Members.empty())
551 return IA_AddOldMember;
553 std::vector<std::string>::iterator MI = std::find_if(
554 Members.begin(), Members.end(),
555 [Name](StringRef Path) { return Name == sys::path::filename(Path); });
557 if (MI == Members.end())
558 return IA_AddOldMember;
562 if (Operation == Delete)
565 if (Operation == Move)
566 return IA_MoveOldMember;
568 if (Operation == ReplaceOrInsert) {
569 StringRef PosName = sys::path::filename(RelPos);
572 return IA_AddNewMeber;
573 return IA_MoveNewMember;
576 // We could try to optimize this to a fstat, but it is not a common
578 sys::fs::file_status Status;
579 failIfError(sys::fs::status(*MI, Status), *MI);
580 if (Status.getLastModificationTime() < I->getLastModified()) {
582 return IA_AddOldMember;
583 return IA_MoveOldMember;
587 return IA_AddNewMeber;
588 return IA_MoveNewMember;
590 llvm_unreachable("No such operation");
593 // We have to walk this twice and computing it is not trivial, so creating an
594 // explicit std::vector is actually fairly efficient.
595 static std::vector<NewArchiveIterator>
596 computeNewArchiveMembers(ArchiveOperation Operation,
597 object::Archive *OldArchive) {
598 std::vector<NewArchiveIterator> Ret;
599 std::vector<NewArchiveIterator> Moved;
601 StringRef PosName = sys::path::filename(RelPos);
603 for (object::Archive::child_iterator I = OldArchive->child_begin(),
604 E = OldArchive->child_end();
606 int Pos = Ret.size();
607 ErrorOr<StringRef> NameOrErr = I->getName();
608 failIfError(NameOrErr.getError());
609 StringRef Name = NameOrErr.get();
610 if (Name == PosName) {
611 assert(AddAfter || AddBefore);
618 std::vector<std::string>::iterator MemberI = Members.end();
619 InsertAction Action = computeInsertAction(Operation, I, Name, MemberI);
621 case IA_AddOldMember:
622 addMember(Ret, I, Name);
625 addMember(Ret, &*MemberI, Name);
629 case IA_MoveOldMember:
630 addMember(Moved, I, Name);
632 case IA_MoveNewMember:
633 addMember(Moved, &*MemberI, Name);
636 if (MemberI != Members.end())
637 Members.erase(MemberI);
641 if (Operation == Delete)
644 if (!RelPos.empty() && InsertPos == -1)
645 fail("Insertion point not found");
648 InsertPos = Ret.size();
650 assert(unsigned(InsertPos) <= Ret.size());
651 Ret.insert(Ret.begin() + InsertPos, Moved.begin(), Moved.end());
653 Ret.insert(Ret.begin() + InsertPos, Members.size(), NewArchiveIterator());
655 for (std::vector<std::string>::iterator I = Members.begin(),
657 I != E; ++I, ++Pos) {
658 StringRef Name = sys::path::filename(*I);
659 addMember(Ret, &*I, Name, Pos);
665 template <typename T>
666 static void printWithSpacePadding(raw_fd_ostream &OS, T Data, unsigned Size,
667 bool MayTruncate = false) {
668 uint64_t OldPos = OS.tell();
670 unsigned SizeSoFar = OS.tell() - OldPos;
671 if (Size > SizeSoFar) {
672 unsigned Remaining = Size - SizeSoFar;
673 for (unsigned I = 0; I < Remaining; ++I)
675 } else if (Size < SizeSoFar) {
676 assert(MayTruncate && "Data doesn't fit in Size");
677 // Some of the data this is used for (like UID) can be larger than the
678 // space available in the archive format. Truncate in that case.
679 OS.seek(OldPos + Size);
683 static void print32BE(raw_fd_ostream &Out, unsigned Val) {
684 for (int I = 3; I >= 0; --I) {
685 char V = (Val >> (8 * I)) & 0xff;
690 static void printRestOfMemberHeader(raw_fd_ostream &Out,
691 const sys::TimeValue &ModTime, unsigned UID,
692 unsigned GID, unsigned Perms,
694 printWithSpacePadding(Out, ModTime.toEpochTime(), 12);
695 printWithSpacePadding(Out, UID, 6, true);
696 printWithSpacePadding(Out, GID, 6, true);
697 printWithSpacePadding(Out, format("%o", Perms), 8);
698 printWithSpacePadding(Out, Size, 10);
702 static void printMemberHeader(raw_fd_ostream &Out, StringRef Name,
703 const sys::TimeValue &ModTime, unsigned UID,
704 unsigned GID, unsigned Perms, unsigned Size) {
705 printWithSpacePadding(Out, Twine(Name) + "/", 16);
706 printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
709 static void printMemberHeader(raw_fd_ostream &Out, unsigned NameOffset,
710 const sys::TimeValue &ModTime, unsigned UID,
711 unsigned GID, unsigned Perms, unsigned Size) {
713 printWithSpacePadding(Out, NameOffset, 15);
714 printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
717 static void writeStringTable(raw_fd_ostream &Out,
718 ArrayRef<NewArchiveIterator> Members,
719 std::vector<unsigned> &StringMapIndexes) {
720 unsigned StartOffset = 0;
721 for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
724 StringRef Name = I->getName();
725 if (Name.size() < 16)
727 if (StartOffset == 0) {
728 printWithSpacePadding(Out, "//", 58);
730 StartOffset = Out.tell();
732 StringMapIndexes.push_back(Out.tell() - StartOffset);
733 Out << Name << "/\n";
735 if (StartOffset == 0)
739 int Pos = Out.tell();
740 Out.seek(StartOffset - 12);
741 printWithSpacePadding(Out, Pos - StartOffset, 10);
746 writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
747 ArrayRef<MemoryBufferRef> Buffers,
748 std::vector<std::pair<unsigned, unsigned>> &MemberOffsetRefs) {
749 unsigned StartOffset = 0;
750 unsigned MemberNum = 0;
752 raw_string_ostream NameOS(NameBuf);
753 unsigned NumSyms = 0;
754 LLVMContext &Context = getGlobalContext();
755 for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
757 I != E; ++I, ++MemberNum) {
758 MemoryBufferRef MemberBuffer = Buffers[MemberNum];
759 ErrorOr<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
760 object::SymbolicFile::createSymbolicFile(
761 MemberBuffer, sys::fs::file_magic::unknown, &Context);
763 continue; // FIXME: check only for "not an object file" errors.
764 object::SymbolicFile &Obj = *ObjOrErr.get();
767 printMemberHeader(Out, "", sys::TimeValue::now(), 0, 0, 0, 0);
768 StartOffset = Out.tell();
772 for (const object::BasicSymbolRef &S : Obj.symbols()) {
773 uint32_t Symflags = S.getFlags();
774 if (Symflags & object::SymbolRef::SF_FormatSpecific)
776 if (!(Symflags & object::SymbolRef::SF_Global))
778 if (Symflags & object::SymbolRef::SF_Undefined)
780 failIfError(S.printName(NameOS));
783 MemberOffsetRefs.push_back(std::make_pair(Out.tell(), MemberNum));
789 if (StartOffset == 0)
795 unsigned Pos = Out.tell();
796 Out.seek(StartOffset - 12);
797 printWithSpacePadding(Out, Pos - StartOffset, 10);
798 Out.seek(StartOffset);
799 print32BE(Out, NumSyms);
803 static void performWriteOperation(ArchiveOperation Operation,
804 object::Archive *OldArchive) {
805 SmallString<128> TmpArchive;
806 failIfError(sys::fs::createUniqueFile(ArchiveName + ".temp-archive-%%%%%%%.a",
807 TmpArchiveFD, TmpArchive));
809 TemporaryOutput = TmpArchive.c_str();
810 tool_output_file Output(TemporaryOutput, TmpArchiveFD);
811 raw_fd_ostream &Out = Output.os();
814 std::vector<NewArchiveIterator> NewMembers =
815 computeNewArchiveMembers(Operation, OldArchive);
817 std::vector<std::pair<unsigned, unsigned> > MemberOffsetRefs;
819 std::vector<std::unique_ptr<MemoryBuffer>> Buffers;
820 std::vector<MemoryBufferRef> Members;
822 for (unsigned I = 0, N = NewMembers.size(); I < N; ++I) {
823 NewArchiveIterator &Member = NewMembers[I];
824 MemoryBufferRef MemberRef;
826 if (Member.isNewMember()) {
827 const char *Filename = Member.getNew();
828 int FD = Member.getFD();
829 const sys::fs::file_status &Status = Member.getStatus();
830 ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
831 MemoryBuffer::getOpenFile(FD, Filename, Status.getSize(), false);
832 failIfError(MemberBufferOrErr.getError(), Filename);
833 Buffers.push_back(std::move(MemberBufferOrErr.get()));
834 MemberRef = Buffers.back()->getMemBufferRef();
836 object::Archive::child_iterator OldMember = Member.getOld();
837 ErrorOr<MemoryBufferRef> MemberBufferOrErr =
838 OldMember->getMemoryBufferRef();
839 failIfError(MemberBufferOrErr.getError());
840 MemberRef = MemberBufferOrErr.get();
842 Members.push_back(MemberRef);
846 writeSymbolTable(Out, NewMembers, Members, MemberOffsetRefs);
849 std::vector<unsigned> StringMapIndexes;
850 writeStringTable(Out, NewMembers, StringMapIndexes);
852 std::vector<std::pair<unsigned, unsigned> >::iterator MemberRefsI =
853 MemberOffsetRefs.begin();
855 unsigned MemberNum = 0;
856 unsigned LongNameMemberNum = 0;
857 for (std::vector<NewArchiveIterator>::iterator I = NewMembers.begin(),
858 E = NewMembers.end();
859 I != E; ++I, ++MemberNum) {
861 unsigned Pos = Out.tell();
862 while (MemberRefsI != MemberOffsetRefs.end() &&
863 MemberRefsI->second == MemberNum) {
864 Out.seek(MemberRefsI->first);
870 MemoryBufferRef File = Members[MemberNum];
871 if (I->isNewMember()) {
872 const char *FileName = I->getNew();
873 const sys::fs::file_status &Status = I->getStatus();
875 StringRef Name = sys::path::filename(FileName);
876 if (Name.size() < 16)
877 printMemberHeader(Out, Name, Status.getLastModificationTime(),
878 Status.getUser(), Status.getGroup(),
879 Status.permissions(), Status.getSize());
881 printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
882 Status.getLastModificationTime(), Status.getUser(),
883 Status.getGroup(), Status.permissions(),
886 object::Archive::child_iterator OldMember = I->getOld();
887 StringRef Name = I->getName();
889 if (Name.size() < 16)
890 printMemberHeader(Out, Name, OldMember->getLastModified(),
891 OldMember->getUID(), OldMember->getGID(),
892 OldMember->getAccessMode(), OldMember->getSize());
894 printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
895 OldMember->getLastModified(), OldMember->getUID(),
896 OldMember->getGID(), OldMember->getAccessMode(),
897 OldMember->getSize());
900 Out << File.getBuffer();
908 sys::fs::rename(TemporaryOutput, ArchiveName);
909 TemporaryOutput = nullptr;
912 static void createSymbolTable(object::Archive *OldArchive) {
913 // When an archive is created or modified, if the s option is given, the
914 // resulting archive will have a current symbol table. If the S option
915 // is given, it will have no symbol table.
916 // In summary, we only need to update the symbol table if we have none.
917 // This is actually very common because of broken build systems that think
918 // they have to run ranlib.
919 if (OldArchive->hasSymbolTable())
922 performWriteOperation(CreateSymTab, OldArchive);
925 static void performOperation(ArchiveOperation Operation,
926 object::Archive *OldArchive) {
931 performReadOperation(Operation, OldArchive);
937 case ReplaceOrInsert:
938 performWriteOperation(Operation, OldArchive);
941 createSymbolTable(OldArchive);
944 llvm_unreachable("Unknown operation.");
947 static int performOperation(ArchiveOperation Operation) {
948 // Create or open the archive object.
949 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
950 MemoryBuffer::getFile(ArchiveName, -1, false);
951 std::error_code EC = Buf.getError();
952 if (EC && EC != errc::no_such_file_or_directory) {
953 errs() << ToolName << ": error opening '" << ArchiveName
954 << "': " << EC.message() << "!\n";
959 object::Archive Archive(Buf.get()->getMemBufferRef(), EC);
962 errs() << ToolName << ": error loading '" << ArchiveName
963 << "': " << EC.message() << "!\n";
966 performOperation(Operation, &Archive);
970 assert(EC == errc::no_such_file_or_directory);
972 if (!shouldCreateArchive(Operation)) {
973 failIfError(EC, Twine("error loading '") + ArchiveName + "'");
976 // Produce a warning if we should and we're creating the archive
977 errs() << ToolName << ": creating " << ArchiveName << "\n";
981 performOperation(Operation, nullptr);
985 int ar_main(char **argv) {
986 // Do our own parsing of the command line because the CommandLine utility
987 // can't handle the grouped positional parameters without a dash.
988 ArchiveOperation Operation = parseCommandLine();
989 return performOperation(Operation);
993 if (RestOfArgs.size() != 1)
994 fail(ToolName + "takes just one archive as argument");
995 ArchiveName = RestOfArgs[0];
996 return performOperation(CreateSymTab);
999 int main(int argc, char **argv) {
1001 // Print a stack trace if we signal out.
1002 sys::PrintStackTraceOnErrorSignal();
1003 PrettyStackTraceProgram X(argc, argv);
1004 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
1006 // Have the command line options parsed and handle things
1007 // like --help and --version.
1008 cl::ParseCommandLineOptions(argc, argv,
1009 "LLVM Archiver (llvm-ar)\n\n"
1010 " This program archives bitcode files into single libraries\n"
1013 llvm::InitializeAllTargetInfos();
1014 llvm::InitializeAllTargetMCs();
1015 llvm::InitializeAllAsmParsers();
1017 StringRef Stem = sys::path::stem(ToolName);
1018 if (Stem.find("ar") != StringRef::npos)
1019 return ar_main(argv);
1020 if (Stem.find("ranlib") != StringRef::npos)
1021 return ranlib_main();
1022 fail("Not ranlib or ar!");