#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Object/Archive.h"
+#include "llvm/Object/ArchiveWriter.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Errc.h"
// The name this program was invoked as.
static StringRef ToolName;
-static const char *TemporaryOutput;
-static int TmpArchiveFD = -1;
-
// Show the error message and exit.
LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) {
outs() << ToolName << ": " << Error << ".\n";
- if (TmpArchiveFD != -1)
- close(TmpArchiveFD);
- if (TemporaryOutput)
- sys::fs::remove(TemporaryOutput);
exit(1);
}
}
}
-namespace {
-class NewArchiveIterator {
- bool IsNewMember;
- StringRef Name;
-
- object::Archive::child_iterator OldI;
-
- StringRef NewFilename;
-
-public:
- NewArchiveIterator(object::Archive::child_iterator I, StringRef Name);
- NewArchiveIterator(StringRef I, StringRef Name);
- NewArchiveIterator();
- bool isNewMember() const;
- StringRef getName() const;
-
- object::Archive::child_iterator getOld() const;
-
- StringRef getNew() const;
- int getFD(sys::fs::file_status &NewStatus) const;
- const sys::fs::file_status &getStatus() const;
-};
-}
-
-NewArchiveIterator::NewArchiveIterator() {}
-
-NewArchiveIterator::NewArchiveIterator(object::Archive::child_iterator I,
- StringRef Name)
- : IsNewMember(false), Name(Name), OldI(I) {}
-
-NewArchiveIterator::NewArchiveIterator(StringRef NewFilename, StringRef Name)
- : IsNewMember(true), Name(Name), NewFilename(NewFilename) {}
-
-StringRef NewArchiveIterator::getName() const { return Name; }
-
-bool NewArchiveIterator::isNewMember() const { return IsNewMember; }
-
-object::Archive::child_iterator NewArchiveIterator::getOld() const {
- assert(!IsNewMember);
- return OldI;
-}
-
-StringRef NewArchiveIterator::getNew() const {
- assert(IsNewMember);
- return NewFilename;
-}
-
-int NewArchiveIterator::getFD(sys::fs::file_status &NewStatus) const {
- assert(IsNewMember);
- int NewFD;
- failIfError(sys::fs::openFileForRead(NewFilename, NewFD), NewFilename);
- assert(NewFD != -1);
-
- failIfError(sys::fs::status(NewFD, NewStatus), NewFilename);
-
- // Opening a directory doesn't make sense. Let it fail.
- // Linux cannot open directories with open(2), although
- // cygwin and *bsd can.
- if (NewStatus.type() == sys::fs::file_type::directory_file)
- failIfError(make_error_code(errc::is_a_directory), NewFilename);
-
- return NewFD;
-}
-
template <typename T>
void addMember(std::vector<NewArchiveIterator> &Members, T I, StringRef Name,
int Pos = -1) {
return Ret;
}
-template <typename T>
-static void printWithSpacePadding(raw_fd_ostream &OS, T Data, unsigned Size,
- bool MayTruncate = false) {
- uint64_t OldPos = OS.tell();
- OS << Data;
- unsigned SizeSoFar = OS.tell() - OldPos;
- if (Size > SizeSoFar) {
- unsigned Remaining = Size - SizeSoFar;
- for (unsigned I = 0; I < Remaining; ++I)
- OS << ' ';
- } else if (Size < SizeSoFar) {
- assert(MayTruncate && "Data doesn't fit in Size");
- // Some of the data this is used for (like UID) can be larger than the
- // space available in the archive format. Truncate in that case.
- OS.seek(OldPos + Size);
- }
-}
-
-static void print32BE(raw_fd_ostream &Out, unsigned Val) {
- for (int I = 3; I >= 0; --I) {
- char V = (Val >> (8 * I)) & 0xff;
- Out << V;
- }
-}
-
-static void printRestOfMemberHeader(raw_fd_ostream &Out,
- const sys::TimeValue &ModTime, unsigned UID,
- unsigned GID, unsigned Perms,
- unsigned Size) {
- printWithSpacePadding(Out, ModTime.toEpochTime(), 12);
- printWithSpacePadding(Out, UID, 6, true);
- printWithSpacePadding(Out, GID, 6, true);
- printWithSpacePadding(Out, format("%o", Perms), 8);
- printWithSpacePadding(Out, Size, 10);
- Out << "`\n";
-}
-
-static void printMemberHeader(raw_fd_ostream &Out, StringRef Name,
- const sys::TimeValue &ModTime, unsigned UID,
- unsigned GID, unsigned Perms, unsigned Size) {
- printWithSpacePadding(Out, Twine(Name) + "/", 16);
- printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
-}
-
-static void printMemberHeader(raw_fd_ostream &Out, unsigned NameOffset,
- const sys::TimeValue &ModTime, unsigned UID,
- unsigned GID, unsigned Perms, unsigned Size) {
- Out << '/';
- printWithSpacePadding(Out, NameOffset, 15);
- printRestOfMemberHeader(Out, ModTime, UID, GID, Perms, Size);
-}
-
-static void writeStringTable(raw_fd_ostream &Out,
- ArrayRef<NewArchiveIterator> Members,
- std::vector<unsigned> &StringMapIndexes) {
- unsigned StartOffset = 0;
- for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
- E = Members.end();
- I != E; ++I) {
- StringRef Name = I->getName();
- if (Name.size() < 16)
- continue;
- if (StartOffset == 0) {
- printWithSpacePadding(Out, "//", 58);
- Out << "`\n";
- StartOffset = Out.tell();
- }
- StringMapIndexes.push_back(Out.tell() - StartOffset);
- Out << Name << "/\n";
- }
- if (StartOffset == 0)
- return;
- if (Out.tell() % 2)
- Out << '\n';
- int Pos = Out.tell();
- Out.seek(StartOffset - 12);
- printWithSpacePadding(Out, Pos - StartOffset, 10);
- Out.seek(Pos);
-}
-
-// Returns the offset of the first reference to a member offset.
-static unsigned writeSymbolTable(raw_fd_ostream &Out,
- ArrayRef<NewArchiveIterator> Members,
- ArrayRef<MemoryBufferRef> Buffers,
- std::vector<unsigned> &MemberOffsetRefs) {
- unsigned StartOffset = 0;
- unsigned MemberNum = 0;
- std::string NameBuf;
- raw_string_ostream NameOS(NameBuf);
- unsigned NumSyms = 0;
- LLVMContext &Context = getGlobalContext();
- for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
- E = Members.end();
- I != E; ++I, ++MemberNum) {
- MemoryBufferRef MemberBuffer = Buffers[MemberNum];
- ErrorOr<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
- object::SymbolicFile::createSymbolicFile(
- MemberBuffer, sys::fs::file_magic::unknown, &Context);
- if (!ObjOrErr)
- continue; // FIXME: check only for "not an object file" errors.
- object::SymbolicFile &Obj = *ObjOrErr.get();
-
- if (!StartOffset) {
- printMemberHeader(Out, "", sys::TimeValue::now(), 0, 0, 0, 0);
- StartOffset = Out.tell();
- print32BE(Out, 0);
- }
-
- for (const object::BasicSymbolRef &S : Obj.symbols()) {
- uint32_t Symflags = S.getFlags();
- if (Symflags & object::SymbolRef::SF_FormatSpecific)
- continue;
- if (!(Symflags & object::SymbolRef::SF_Global))
- continue;
- if (Symflags & object::SymbolRef::SF_Undefined)
- continue;
- failIfError(S.printName(NameOS));
- NameOS << '\0';
- ++NumSyms;
- MemberOffsetRefs.push_back(MemberNum);
- print32BE(Out, 0);
- }
- }
- Out << NameOS.str();
-
- if (StartOffset == 0)
- return 0;
-
- if (Out.tell() % 2)
- Out << '\0';
-
- unsigned Pos = Out.tell();
- Out.seek(StartOffset - 12);
- printWithSpacePadding(Out, Pos - StartOffset, 10);
- Out.seek(StartOffset);
- print32BE(Out, NumSyms);
- Out.seek(Pos);
- return StartOffset + 4;
-}
-
-static void
-performWriteOperation(ArchiveOperation Operation, object::Archive *OldArchive,
- std::vector<NewArchiveIterator> &NewMembers) {
- SmallString<128> TmpArchive;
- failIfError(sys::fs::createUniqueFile(ArchiveName + ".temp-archive-%%%%%%%.a",
- TmpArchiveFD, TmpArchive));
-
- TemporaryOutput = TmpArchive.c_str();
- tool_output_file Output(TemporaryOutput, TmpArchiveFD);
- raw_fd_ostream &Out = Output.os();
- Out << "!<arch>\n";
-
- std::vector<unsigned> MemberOffsetRefs;
-
- std::vector<std::unique_ptr<MemoryBuffer>> Buffers;
- std::vector<MemoryBufferRef> Members;
- std::vector<sys::fs::file_status> NewMemberStatus;
-
- for (unsigned I = 0, N = NewMembers.size(); I < N; ++I) {
- NewArchiveIterator &Member = NewMembers[I];
- MemoryBufferRef MemberRef;
-
- if (Member.isNewMember()) {
- StringRef Filename = Member.getNew();
- NewMemberStatus.resize(NewMemberStatus.size() + 1);
- sys::fs::file_status &Status = NewMemberStatus.back();
- int FD = Member.getFD(Status);
- ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
- MemoryBuffer::getOpenFile(FD, Filename, Status.getSize(), false);
- failIfError(MemberBufferOrErr.getError(), Filename);
- if (close(FD) != 0)
- fail("Could not close file");
- Buffers.push_back(std::move(MemberBufferOrErr.get()));
- MemberRef = Buffers.back()->getMemBufferRef();
- } else {
- object::Archive::child_iterator OldMember = Member.getOld();
- ErrorOr<MemoryBufferRef> MemberBufferOrErr =
- OldMember->getMemoryBufferRef();
- failIfError(MemberBufferOrErr.getError());
- MemberRef = MemberBufferOrErr.get();
- }
- Members.push_back(MemberRef);
- }
-
- unsigned MemberReferenceOffset = 0;
- if (Symtab) {
- MemberReferenceOffset =
- writeSymbolTable(Out, NewMembers, Members, MemberOffsetRefs);
- }
-
- std::vector<unsigned> StringMapIndexes;
- writeStringTable(Out, NewMembers, StringMapIndexes);
-
- unsigned MemberNum = 0;
- unsigned LongNameMemberNum = 0;
- unsigned NewMemberNum = 0;
- std::vector<unsigned> MemberOffset;
- for (std::vector<NewArchiveIterator>::iterator I = NewMembers.begin(),
- E = NewMembers.end();
- I != E; ++I, ++MemberNum) {
-
- unsigned Pos = Out.tell();
- MemberOffset.push_back(Pos);
-
- MemoryBufferRef File = Members[MemberNum];
- if (I->isNewMember()) {
- StringRef FileName = I->getNew();
- const sys::fs::file_status &Status = NewMemberStatus[NewMemberNum];
- NewMemberNum++;
-
- StringRef Name = sys::path::filename(FileName);
- if (Name.size() < 16)
- printMemberHeader(Out, Name, Status.getLastModificationTime(),
- Status.getUser(), Status.getGroup(),
- Status.permissions(), Status.getSize());
- else
- printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
- Status.getLastModificationTime(), Status.getUser(),
- Status.getGroup(), Status.permissions(),
- Status.getSize());
- } else {
- object::Archive::child_iterator OldMember = I->getOld();
- StringRef Name = I->getName();
-
- if (Name.size() < 16)
- printMemberHeader(Out, Name, OldMember->getLastModified(),
- OldMember->getUID(), OldMember->getGID(),
- OldMember->getAccessMode(), OldMember->getSize());
- else
- printMemberHeader(Out, StringMapIndexes[LongNameMemberNum++],
- OldMember->getLastModified(), OldMember->getUID(),
- OldMember->getGID(), OldMember->getAccessMode(),
- OldMember->getSize());
- }
-
- Out << File.getBuffer();
-
- if (Out.tell() % 2)
- Out << '\n';
- }
-
- if (MemberReferenceOffset) {
- Out.seek(MemberReferenceOffset);
- for (unsigned MemberNum : MemberOffsetRefs)
- print32BE(Out, MemberOffset[MemberNum]);
- }
-
- Output.keep();
- Out.close();
- sys::fs::rename(TemporaryOutput, ArchiveName);
- TemporaryOutput = nullptr;
-}
-
static void
performWriteOperation(ArchiveOperation Operation, object::Archive *OldArchive,
std::vector<NewArchiveIterator> *NewMembersP) {
if (NewMembersP) {
- performWriteOperation(Operation, OldArchive, *NewMembersP);
+ std::pair<StringRef, std::error_code> Result =
+ writeArchive(ArchiveName, *NewMembersP, Symtab);
+ failIfError(Result.second, Result.first);
return;
}
std::vector<NewArchiveIterator> NewMembers =
computeNewArchiveMembers(Operation, OldArchive);
- performWriteOperation(Operation, OldArchive, NewMembers);
+ auto Result = writeArchive(ArchiveName, NewMembers, Symtab);
+ failIfError(Result.second, Result.first);
}
static void createSymbolTable(object::Archive *OldArchive) {
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