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 " [o] - preserve original dates\n"
96 " [s] - create an archive index (cf. ranlib)\n"
97 " [S] - do not build a symbol table\n"
98 " [u] - update only files newer than archive contents\n"
99 "\nMODIFIERS (generic):\n"
100 " [c] - do not warn if the library had to be created\n"
101 " [v] - be verbose about actions taken\n"
104 // This enumeration delineates the kinds of operations on an archive
105 // that are permitted.
106 enum ArchiveOperation {
107 Print, ///< Print the contents of the archive
108 Delete, ///< Delete the specified members
109 Move, ///< Move members to end or as given by {a,b,i} modifiers
110 QuickAppend, ///< Quickly append to end of archive
111 ReplaceOrInsert, ///< Replace or Insert members
112 DisplayTable, ///< Display the table of contents
113 Extract, ///< Extract files back to file system
114 CreateSymTab ///< Create a symbol table in an existing archive
117 // Modifiers to follow operation to vary behavior
118 static bool AddAfter = false; ///< 'a' modifier
119 static bool AddBefore = false; ///< 'b' modifier
120 static bool Create = false; ///< 'c' modifier
121 static bool OriginalDates = false; ///< 'o' modifier
122 static bool OnlyUpdate = false; ///< 'u' modifier
123 static bool Verbose = false; ///< 'v' modifier
124 static bool Symtab = true; ///< 's' modifier
126 // Relative Positional Argument (for insert/move). This variable holds
127 // the name of the archive member to which the 'a', 'b' or 'i' modifier
128 // refers. Only one of 'a', 'b' or 'i' can be specified so we only need
130 static std::string RelPos;
132 // This variable holds the name of the archive file as given on the
134 static std::string ArchiveName;
136 // This variable holds the list of member files to proecess, as given
137 // on the command line.
138 static std::vector<StringRef> Members;
140 // Show the error message, the help message and exit.
141 LLVM_ATTRIBUTE_NORETURN static void
142 show_help(const std::string &msg) {
143 errs() << ToolName << ": " << msg << "\n\n";
144 cl::PrintHelpMessage();
148 // Extract the member filename from the command line for the [relpos] argument
149 // associated with a, b, and i modifiers
150 static void getRelPos() {
151 if(RestOfArgs.size() == 0)
152 show_help("Expected [relpos] for a, b, or i modifier");
153 RelPos = RestOfArgs[0];
154 RestOfArgs.erase(RestOfArgs.begin());
157 static void getOptions() {
158 if(RestOfArgs.size() == 0)
159 show_help("Expected options");
160 Options = RestOfArgs[0];
161 RestOfArgs.erase(RestOfArgs.begin());
164 // Get the archive file name from the command line
165 static void getArchive() {
166 if(RestOfArgs.size() == 0)
167 show_help("An archive name must be specified");
168 ArchiveName = RestOfArgs[0];
169 RestOfArgs.erase(RestOfArgs.begin());
172 // Copy over remaining items in RestOfArgs to our Members vector
173 static void getMembers() {
174 for (auto &Arg : RestOfArgs)
175 Members.push_back(Arg);
178 static void runMRIScript();
180 // Parse the command line options as presented and return the operation
181 // specified. Process all modifiers and check to make sure that constraints on
182 // modifier/operation pairs have not been violated.
183 static ArchiveOperation parseCommandLine() {
185 if (!RestOfArgs.empty())
186 fail("Cannot mix -M and other options");
192 // Keep track of number of operations. We can only specify one
194 unsigned NumOperations = 0;
196 // Keep track of the number of positional modifiers (a,b,i). Only
197 // one can be specified.
198 unsigned NumPositional = 0;
200 // Keep track of which operation was requested
201 ArchiveOperation Operation;
203 bool MaybeJustCreateSymTab = false;
205 for(unsigned i=0; i<Options.size(); ++i) {
207 case 'd': ++NumOperations; Operation = Delete; break;
208 case 'm': ++NumOperations; Operation = Move ; break;
209 case 'p': ++NumOperations; Operation = Print; break;
210 case 'q': ++NumOperations; Operation = QuickAppend; break;
211 case 'r': ++NumOperations; Operation = ReplaceOrInsert; break;
212 case 't': ++NumOperations; Operation = DisplayTable; break;
213 case 'x': ++NumOperations; Operation = Extract; break;
214 case 'c': Create = true; break;
215 case 'l': /* accepted but unused */ break;
216 case 'o': OriginalDates = true; break;
219 MaybeJustCreateSymTab = true;
224 case 'u': OnlyUpdate = true; break;
225 case 'v': Verbose = true; break;
242 cl::PrintHelpMessage();
246 // At this point, the next thing on the command line must be
250 // Everything on the command line at this point is a member.
253 if (NumOperations == 0 && MaybeJustCreateSymTab) {
255 Operation = CreateSymTab;
256 if (!Members.empty())
257 show_help("The s operation takes only an archive as argument");
260 // Perform various checks on the operation/modifier specification
261 // to make sure we are dealing with a legal request.
262 if (NumOperations == 0)
263 show_help("You must specify at least one of the operations");
264 if (NumOperations > 1)
265 show_help("Only one operation may be specified");
266 if (NumPositional > 1)
267 show_help("You may only specify one of a, b, and i modifiers");
268 if (AddAfter || AddBefore) {
269 if (Operation != Move && Operation != ReplaceOrInsert)
270 show_help("The 'a', 'b' and 'i' modifiers can only be specified with "
271 "the 'm' or 'r' operations");
273 if (OriginalDates && Operation != Extract)
274 show_help("The 'o' modifier is only applicable to the 'x' operation");
275 if (OnlyUpdate && Operation != ReplaceOrInsert)
276 show_help("The 'u' modifier is only applicable to the 'r' operation");
278 // Return the parsed operation to the caller
282 // Implements the 'p' operation. This function traverses the archive
283 // looking for members that match the path list.
284 static void doPrint(StringRef Name, object::Archive::child_iterator I) {
286 outs() << "Printing " << Name << "\n";
288 StringRef Data = I->getBuffer();
289 outs().write(Data.data(), Data.size());
292 // Utility function for printing out the file mode when the 't' operation is in
294 static void printMode(unsigned mode) {
309 // Implement the 't' operation. This function prints out just
310 // the file names of each of the members. However, if verbose mode is requested
311 // ('v' modifier) then the file type, permission mode, user, group, size, and
312 // modification time are also printed.
313 static void doDisplayTable(StringRef Name, object::Archive::child_iterator I) {
315 sys::fs::perms Mode = I->getAccessMode();
316 printMode((Mode >> 6) & 007);
317 printMode((Mode >> 3) & 007);
318 printMode(Mode & 007);
319 outs() << ' ' << I->getUID();
320 outs() << '/' << I->getGID();
321 outs() << ' ' << format("%6llu", I->getSize());
322 outs() << ' ' << I->getLastModified().str();
325 outs() << Name << "\n";
328 // Implement the 'x' operation. This function extracts files back to the file
330 static void doExtract(StringRef Name, object::Archive::child_iterator I) {
331 // Retain the original mode.
332 sys::fs::perms Mode = I->getAccessMode();
333 SmallString<128> Storage = Name;
337 sys::fs::openFileForWrite(Storage.c_str(), FD, sys::fs::F_None, Mode),
341 raw_fd_ostream file(FD, false);
343 // Get the data and its length
344 StringRef Data = I->getBuffer();
347 file.write(Data.data(), Data.size());
350 // If we're supposed to retain the original modification times, etc. do so
354 sys::fs::setLastModificationAndAccessTime(FD, I->getLastModified()));
357 fail("Could not close the file");
360 static bool shouldCreateArchive(ArchiveOperation Op) {
371 case ReplaceOrInsert:
375 llvm_unreachable("Missing entry in covered switch.");
378 static void performReadOperation(ArchiveOperation Operation,
379 object::Archive *OldArchive) {
380 for (object::Archive::child_iterator I = OldArchive->child_begin(),
381 E = OldArchive->child_end();
383 ErrorOr<StringRef> NameOrErr = I->getName();
384 failIfError(NameOrErr.getError());
385 StringRef Name = NameOrErr.get();
387 if (!Members.empty() &&
388 std::find(Members.begin(), Members.end(), Name) == Members.end())
393 llvm_unreachable("Not a read operation");
398 doDisplayTable(Name, I);
408 class NewArchiveIterator {
412 object::Archive::child_iterator OldI;
414 StringRef NewFilename;
417 NewArchiveIterator(object::Archive::child_iterator I, StringRef Name);
418 NewArchiveIterator(StringRef I, StringRef Name);
419 NewArchiveIterator();
420 bool isNewMember() const;
421 StringRef getName() const;
423 object::Archive::child_iterator getOld() const;
425 StringRef getNew() const;
426 int getFD(sys::fs::file_status &NewStatus) const;
427 const sys::fs::file_status &getStatus() const;
431 NewArchiveIterator::NewArchiveIterator() {}
433 NewArchiveIterator::NewArchiveIterator(object::Archive::child_iterator I,
435 : IsNewMember(false), Name(Name), OldI(I) {}
437 NewArchiveIterator::NewArchiveIterator(StringRef NewFilename, StringRef Name)
438 : IsNewMember(true), Name(Name), NewFilename(NewFilename) {}
440 StringRef NewArchiveIterator::getName() const { return Name; }
442 bool NewArchiveIterator::isNewMember() const { return IsNewMember; }
444 object::Archive::child_iterator NewArchiveIterator::getOld() const {
445 assert(!IsNewMember);
449 StringRef NewArchiveIterator::getNew() const {
454 int NewArchiveIterator::getFD(sys::fs::file_status &NewStatus) const {
457 failIfError(sys::fs::openFileForRead(NewFilename, NewFD), NewFilename);
460 failIfError(sys::fs::status(NewFD, NewStatus), NewFilename);
462 // Opening a directory doesn't make sense. Let it fail.
463 // Linux cannot open directories with open(2), although
464 // cygwin and *bsd can.
465 if (NewStatus.type() == sys::fs::file_type::directory_file)
466 failIfError(make_error_code(errc::is_a_directory), NewFilename);
471 template <typename T>
472 void addMember(std::vector<NewArchiveIterator> &Members, T I, StringRef Name,
474 NewArchiveIterator NI(I, Name);
476 Members.push_back(NI);
489 static InsertAction computeInsertAction(ArchiveOperation Operation,
490 object::Archive::child_iterator I,
492 std::vector<StringRef>::iterator &Pos) {
493 if (Operation == QuickAppend || Members.empty())
494 return IA_AddOldMember;
497 std::find_if(Members.begin(), Members.end(), [Name](StringRef Path) {
498 return Name == sys::path::filename(Path);
501 if (MI == Members.end())
502 return IA_AddOldMember;
506 if (Operation == Delete)
509 if (Operation == Move)
510 return IA_MoveOldMember;
512 if (Operation == ReplaceOrInsert) {
513 StringRef PosName = sys::path::filename(RelPos);
516 return IA_AddNewMeber;
517 return IA_MoveNewMember;
520 // We could try to optimize this to a fstat, but it is not a common
522 sys::fs::file_status Status;
523 failIfError(sys::fs::status(*MI, Status), *MI);
524 if (Status.getLastModificationTime() < I->getLastModified()) {
526 return IA_AddOldMember;
527 return IA_MoveOldMember;
531 return IA_AddNewMeber;
532 return IA_MoveNewMember;
534 llvm_unreachable("No such operation");
537 // We have to walk this twice and computing it is not trivial, so creating an
538 // explicit std::vector is actually fairly efficient.
539 static std::vector<NewArchiveIterator>
540 computeNewArchiveMembers(ArchiveOperation Operation,
541 object::Archive *OldArchive) {
542 std::vector<NewArchiveIterator> Ret;
543 std::vector<NewArchiveIterator> Moved;
545 StringRef PosName = sys::path::filename(RelPos);
547 for (auto &Child : OldArchive->children()) {
548 int Pos = Ret.size();
549 ErrorOr<StringRef> NameOrErr = Child.getName();
550 failIfError(NameOrErr.getError());
551 StringRef Name = NameOrErr.get();
552 if (Name == PosName) {
553 assert(AddAfter || AddBefore);
560 std::vector<StringRef>::iterator MemberI = Members.end();
561 InsertAction Action =
562 computeInsertAction(Operation, Child, Name, MemberI);
564 case IA_AddOldMember:
565 addMember(Ret, Child, Name);
568 addMember(Ret, *MemberI, Name);
572 case IA_MoveOldMember:
573 addMember(Moved, Child, Name);
575 case IA_MoveNewMember:
576 addMember(Moved, *MemberI, Name);
579 if (MemberI != Members.end())
580 Members.erase(MemberI);
584 if (Operation == Delete)
587 if (!RelPos.empty() && InsertPos == -1)
588 fail("Insertion point not found");
591 InsertPos = Ret.size();
593 assert(unsigned(InsertPos) <= Ret.size());
594 Ret.insert(Ret.begin() + InsertPos, Moved.begin(), Moved.end());
596 Ret.insert(Ret.begin() + InsertPos, Members.size(), NewArchiveIterator());
598 for (auto &Member : Members) {
599 StringRef Name = sys::path::filename(Member);
600 addMember(Ret, Member, Name, Pos);
607 template <typename T>
608 static void printWithSpacePadding(raw_fd_ostream &OS, T Data, unsigned Size,
609 bool MayTruncate = false) {
610 uint64_t OldPos = OS.tell();
612 unsigned SizeSoFar = OS.tell() - OldPos;
613 if (Size > SizeSoFar) {
614 unsigned Remaining = Size - SizeSoFar;
615 for (unsigned I = 0; I < Remaining; ++I)
617 } else if (Size < SizeSoFar) {
618 assert(MayTruncate && "Data doesn't fit in Size");
619 // Some of the data this is used for (like UID) can be larger than the
620 // space available in the archive format. Truncate in that case.
621 OS.seek(OldPos + Size);
625 static void print32BE(raw_fd_ostream &Out, unsigned Val) {
626 for (int I = 3; I >= 0; --I) {
627 char V = (Val >> (8 * I)) & 0xff;
632 static void printRestOfMemberHeader(raw_fd_ostream &Out,
633 const sys::TimeValue &ModTime, unsigned UID,
634 unsigned GID, unsigned Perms,
636 printWithSpacePadding(Out, ModTime.toEpochTime(), 12);
637 printWithSpacePadding(Out, UID, 6, true);
638 printWithSpacePadding(Out, GID, 6, true);
639 printWithSpacePadding(Out, format("%o", Perms), 8);
640 printWithSpacePadding(Out, Size, 10);
644 static void printMemberHeader(raw_fd_ostream &Out, StringRef Name,
645 const sys::TimeValue &ModTime, unsigned UID,
646 unsigned GID, unsigned Perms, unsigned Size) {
647 printWithSpacePadding(Out, Twine(Name) + "/", 16);
648 printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
651 static void printMemberHeader(raw_fd_ostream &Out, unsigned NameOffset,
652 const sys::TimeValue &ModTime, unsigned UID,
653 unsigned GID, unsigned Perms, unsigned Size) {
655 printWithSpacePadding(Out, NameOffset, 15);
656 printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
659 static void writeStringTable(raw_fd_ostream &Out,
660 ArrayRef<NewArchiveIterator> Members,
661 std::vector<unsigned> &StringMapIndexes) {
662 unsigned StartOffset = 0;
663 for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
666 StringRef Name = I->getName();
667 if (Name.size() < 16)
669 if (StartOffset == 0) {
670 printWithSpacePadding(Out, "//", 58);
672 StartOffset = Out.tell();
674 StringMapIndexes.push_back(Out.tell() - StartOffset);
675 Out << Name << "/\n";
677 if (StartOffset == 0)
681 int Pos = Out.tell();
682 Out.seek(StartOffset - 12);
683 printWithSpacePadding(Out, Pos - StartOffset, 10);
687 // Returns the offset of the first reference to a member offset.
688 static unsigned writeSymbolTable(raw_fd_ostream &Out,
689 ArrayRef<NewArchiveIterator> Members,
690 ArrayRef<MemoryBufferRef> Buffers,
691 std::vector<unsigned> &MemberOffsetRefs) {
692 unsigned StartOffset = 0;
693 unsigned MemberNum = 0;
695 raw_string_ostream NameOS(NameBuf);
696 unsigned NumSyms = 0;
697 LLVMContext &Context = getGlobalContext();
698 for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
700 I != E; ++I, ++MemberNum) {
701 MemoryBufferRef MemberBuffer = Buffers[MemberNum];
702 ErrorOr<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
703 object::SymbolicFile::createSymbolicFile(
704 MemberBuffer, sys::fs::file_magic::unknown, &Context);
706 continue; // FIXME: check only for "not an object file" errors.
707 object::SymbolicFile &Obj = *ObjOrErr.get();
710 printMemberHeader(Out, "", sys::TimeValue::now(), 0, 0, 0, 0);
711 StartOffset = Out.tell();
715 for (const object::BasicSymbolRef &S : Obj.symbols()) {
716 uint32_t Symflags = S.getFlags();
717 if (Symflags & object::SymbolRef::SF_FormatSpecific)
719 if (!(Symflags & object::SymbolRef::SF_Global))
721 if (Symflags & object::SymbolRef::SF_Undefined)
723 failIfError(S.printName(NameOS));
726 MemberOffsetRefs.push_back(MemberNum);
732 if (StartOffset == 0)
738 unsigned Pos = Out.tell();
739 Out.seek(StartOffset - 12);
740 printWithSpacePadding(Out, Pos - StartOffset, 10);
741 Out.seek(StartOffset);
742 print32BE(Out, NumSyms);
744 return StartOffset + 4;
748 performWriteOperation(ArchiveOperation Operation, object::Archive *OldArchive,
749 std::vector<NewArchiveIterator> &NewMembers) {
750 SmallString<128> TmpArchive;
751 failIfError(sys::fs::createUniqueFile(ArchiveName + ".temp-archive-%%%%%%%.a",
752 TmpArchiveFD, TmpArchive));
754 TemporaryOutput = TmpArchive.c_str();
755 tool_output_file Output(TemporaryOutput, TmpArchiveFD);
756 raw_fd_ostream &Out = Output.os();
759 std::vector<unsigned> MemberOffsetRefs;
761 std::vector<std::unique_ptr<MemoryBuffer>> Buffers;
762 std::vector<MemoryBufferRef> Members;
763 std::vector<sys::fs::file_status> NewMemberStatus;
765 for (unsigned I = 0, N = NewMembers.size(); I < N; ++I) {
766 NewArchiveIterator &Member = NewMembers[I];
767 MemoryBufferRef MemberRef;
769 if (Member.isNewMember()) {
770 StringRef Filename = Member.getNew();
771 NewMemberStatus.resize(NewMemberStatus.size() + 1);
772 sys::fs::file_status &Status = NewMemberStatus.back();
773 int FD = Member.getFD(Status);
774 ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
775 MemoryBuffer::getOpenFile(FD, Filename, Status.getSize(), false);
776 failIfError(MemberBufferOrErr.getError(), Filename);
778 fail("Could not close file");
779 Buffers.push_back(std::move(MemberBufferOrErr.get()));
780 MemberRef = Buffers.back()->getMemBufferRef();
782 object::Archive::child_iterator OldMember = Member.getOld();
783 ErrorOr<MemoryBufferRef> MemberBufferOrErr =
784 OldMember->getMemoryBufferRef();
785 failIfError(MemberBufferOrErr.getError());
786 MemberRef = MemberBufferOrErr.get();
788 Members.push_back(MemberRef);
791 unsigned MemberReferenceOffset = 0;
793 MemberReferenceOffset =
794 writeSymbolTable(Out, NewMembers, Members, MemberOffsetRefs);
797 std::vector<unsigned> StringMapIndexes;
798 writeStringTable(Out, NewMembers, StringMapIndexes);
800 unsigned MemberNum = 0;
801 unsigned LongNameMemberNum = 0;
802 unsigned NewMemberNum = 0;
803 std::vector<unsigned> MemberOffset;
804 for (std::vector<NewArchiveIterator>::iterator I = NewMembers.begin(),
805 E = NewMembers.end();
806 I != E; ++I, ++MemberNum) {
808 unsigned Pos = Out.tell();
809 MemberOffset.push_back(Pos);
811 MemoryBufferRef File = Members[MemberNum];
812 if (I->isNewMember()) {
813 StringRef FileName = I->getNew();
814 const sys::fs::file_status &Status = NewMemberStatus[NewMemberNum];
817 StringRef Name = sys::path::filename(FileName);
818 if (Name.size() < 16)
819 printMemberHeader(Out, Name, Status.getLastModificationTime(),
820 Status.getUser(), Status.getGroup(),
821 Status.permissions(), Status.getSize());
823 printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
824 Status.getLastModificationTime(), Status.getUser(),
825 Status.getGroup(), Status.permissions(),
828 object::Archive::child_iterator OldMember = I->getOld();
829 StringRef Name = I->getName();
831 if (Name.size() < 16)
832 printMemberHeader(Out, Name, OldMember->getLastModified(),
833 OldMember->getUID(), OldMember->getGID(),
834 OldMember->getAccessMode(), OldMember->getSize());
836 printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
837 OldMember->getLastModified(), OldMember->getUID(),
838 OldMember->getGID(), OldMember->getAccessMode(),
839 OldMember->getSize());
842 Out << File.getBuffer();
848 if (MemberReferenceOffset) {
849 Out.seek(MemberReferenceOffset);
850 for (unsigned MemberNum : MemberOffsetRefs)
851 print32BE(Out, MemberOffset[MemberNum]);
856 sys::fs::rename(TemporaryOutput, ArchiveName);
857 TemporaryOutput = nullptr;
861 performWriteOperation(ArchiveOperation Operation, object::Archive *OldArchive,
862 std::vector<NewArchiveIterator> *NewMembersP) {
864 performWriteOperation(Operation, OldArchive, *NewMembersP);
867 std::vector<NewArchiveIterator> NewMembers =
868 computeNewArchiveMembers(Operation, OldArchive);
869 performWriteOperation(Operation, OldArchive, NewMembers);
872 static void createSymbolTable(object::Archive *OldArchive) {
873 // When an archive is created or modified, if the s option is given, the
874 // resulting archive will have a current symbol table. If the S option
875 // is given, it will have no symbol table.
876 // In summary, we only need to update the symbol table if we have none.
877 // This is actually very common because of broken build systems that think
878 // they have to run ranlib.
879 if (OldArchive->hasSymbolTable())
882 performWriteOperation(CreateSymTab, OldArchive, nullptr);
885 static void performOperation(ArchiveOperation Operation,
886 object::Archive *OldArchive,
887 std::vector<NewArchiveIterator> *NewMembers) {
892 performReadOperation(Operation, OldArchive);
898 case ReplaceOrInsert:
899 performWriteOperation(Operation, OldArchive, NewMembers);
902 createSymbolTable(OldArchive);
905 llvm_unreachable("Unknown operation.");
908 static int performOperation(ArchiveOperation Operation,
909 std::vector<NewArchiveIterator> *NewMembers) {
910 // Create or open the archive object.
911 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
912 MemoryBuffer::getFile(ArchiveName, -1, false);
913 std::error_code EC = Buf.getError();
914 if (EC && EC != errc::no_such_file_or_directory) {
915 errs() << ToolName << ": error opening '" << ArchiveName
916 << "': " << EC.message() << "!\n";
921 object::Archive Archive(Buf.get()->getMemBufferRef(), EC);
924 errs() << ToolName << ": error loading '" << ArchiveName
925 << "': " << EC.message() << "!\n";
928 performOperation(Operation, &Archive, NewMembers);
932 assert(EC == errc::no_such_file_or_directory);
934 if (!shouldCreateArchive(Operation)) {
935 failIfError(EC, Twine("error loading '") + ArchiveName + "'");
938 // Produce a warning if we should and we're creating the archive
939 errs() << ToolName << ": creating " << ArchiveName << "\n";
943 performOperation(Operation, nullptr, NewMembers);
947 static void runMRIScript() {
948 enum class MRICommand { AddLib, AddMod, Create, Save, End, Invalid };
950 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf = MemoryBuffer::getSTDIN();
951 failIfError(Buf.getError());
952 const MemoryBuffer &Ref = *Buf.get();
954 std::vector<NewArchiveIterator> NewMembers;
955 std::vector<std::unique_ptr<MemoryBuffer>> ArchiveBuffers;
956 std::vector<std::unique_ptr<object::Archive>> Archives;
958 for (line_iterator I(Ref, /*SkipBlanks*/ true, ';'), E; I != E; ++I) {
960 StringRef CommandStr, Rest;
961 std::tie(CommandStr, Rest) = Line.split(' ');
963 if (!Rest.empty() && Rest.front() == '"' && Rest.back() == '"')
964 Rest = Rest.drop_front().drop_back();
965 auto Command = StringSwitch<MRICommand>(CommandStr.lower())
966 .Case("addlib", MRICommand::AddLib)
967 .Case("addmod", MRICommand::AddMod)
968 .Case("create", MRICommand::Create)
969 .Case("save", MRICommand::Save)
970 .Case("end", MRICommand::End)
971 .Default(MRICommand::Invalid);
974 case MRICommand::AddLib: {
975 auto BufOrErr = MemoryBuffer::getFile(Rest, -1, false);
976 failIfError(BufOrErr.getError(), "Could not open library");
977 ArchiveBuffers.push_back(std::move(*BufOrErr));
979 object::Archive::create(ArchiveBuffers.back()->getMemBufferRef());
980 failIfError(LibOrErr.getError(), "Could not parse library");
981 Archives.push_back(std::move(*LibOrErr));
982 object::Archive &Lib = *Archives.back();
983 for (auto &Member : Lib.children()) {
984 ErrorOr<StringRef> NameOrErr = Member.getName();
985 failIfError(NameOrErr.getError());
986 addMember(NewMembers, Member, *NameOrErr);
990 case MRICommand::AddMod:
991 addMember(NewMembers, Rest, sys::path::filename(Rest));
993 case MRICommand::Create:
995 if (!ArchiveName.empty())
996 fail("Editing multiple archives not supported");
998 fail("File already saved");
1001 case MRICommand::Save:
1004 case MRICommand::End:
1006 case MRICommand::Invalid:
1007 fail("Unknown command: " + CommandStr);
1011 // Nothing to do if not saved.
1013 performOperation(ReplaceOrInsert, &NewMembers);
1017 static int ar_main() {
1018 // Do our own parsing of the command line because the CommandLine utility
1019 // can't handle the grouped positional parameters without a dash.
1020 ArchiveOperation Operation = parseCommandLine();
1021 return performOperation(Operation, nullptr);
1024 static int ranlib_main() {
1025 if (RestOfArgs.size() != 1)
1026 fail(ToolName + "takes just one archive as argument");
1027 ArchiveName = RestOfArgs[0];
1028 return performOperation(CreateSymTab, nullptr);
1031 int main(int argc, char **argv) {
1033 // Print a stack trace if we signal out.
1034 sys::PrintStackTraceOnErrorSignal();
1035 PrettyStackTraceProgram X(argc, argv);
1036 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
1038 // Have the command line options parsed and handle things
1039 // like --help and --version.
1040 cl::ParseCommandLineOptions(argc, argv,
1041 "LLVM Archiver (llvm-ar)\n\n"
1042 " This program archives bitcode files into single libraries\n"
1045 llvm::InitializeAllTargetInfos();
1046 llvm::InitializeAllTargetMCs();
1047 llvm::InitializeAllAsmParsers();
1049 StringRef Stem = sys::path::stem(ToolName);
1050 if (Stem.find("ar") != StringRef::npos)
1052 if (Stem.find("ranlib") != StringRef::npos)
1053 return ranlib_main();
1054 fail("Not ranlib or ar!");