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-rw-r--r--tools/llvm-ar/llvm-ar.cpp240
1 files changed, 133 insertions, 107 deletions
diff --git a/tools/llvm-ar/llvm-ar.cpp b/tools/llvm-ar/llvm-ar.cpp
index d70db728f2da..f638e55c5c71 100644
--- a/tools/llvm-ar/llvm-ar.cpp
+++ b/tools/llvm-ar/llvm-ar.cpp
@@ -17,12 +17,14 @@
#include "llvm/Object/Archive.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Errc.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
+#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
@@ -53,7 +55,7 @@ LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) {
exit(1);
}
-static void failIfError(error_code EC, Twine Context = "") {
+static void failIfError(std::error_code EC, Twine Context = "") {
if (!EC)
return;
@@ -322,7 +324,7 @@ static void doExtract(StringRef Name, object::Archive::child_iterator I) {
int FD;
failIfError(
- sys::fs::openFileForWrite(Storage.c_str(), FD, sys::fs::F_Binary, Mode),
+ sys::fs::openFileForWrite(Storage.c_str(), FD, sys::fs::F_None, Mode),
Storage.c_str());
{
@@ -365,11 +367,12 @@ static bool shouldCreateArchive(ArchiveOperation Op) {
static void performReadOperation(ArchiveOperation Operation,
object::Archive *OldArchive) {
- for (object::Archive::child_iterator I = OldArchive->begin_children(),
- E = OldArchive->end_children();
+ for (object::Archive::child_iterator I = OldArchive->child_begin(),
+ E = OldArchive->child_end();
I != E; ++I) {
- StringRef Name;
- failIfError(I->getName(Name));
+ ErrorOr<StringRef> NameOrErr = I->getName();
+ failIfError(NameOrErr.getError());
+ StringRef Name = NameOrErr.get();
if (!Members.empty() &&
std::find(Members.begin(), Members.end(), Name) == Members.end())
@@ -395,17 +398,25 @@ namespace {
class NewArchiveIterator {
bool IsNewMember;
StringRef Name;
+
object::Archive::child_iterator OldI;
+
std::string NewFilename;
+ mutable int NewFD;
+ mutable sys::fs::file_status NewStatus;
public:
NewArchiveIterator(object::Archive::child_iterator I, StringRef Name);
NewArchiveIterator(std::string *I, StringRef Name);
NewArchiveIterator();
bool isNewMember() const;
+ StringRef getName() const;
+
object::Archive::child_iterator getOld() const;
+
const char *getNew() const;
- StringRef getName() const;
+ int getFD() const;
+ const sys::fs::file_status &getStatus() const;
};
}
@@ -416,7 +427,7 @@ NewArchiveIterator::NewArchiveIterator(object::Archive::child_iterator I,
: IsNewMember(false), Name(Name), OldI(I) {}
NewArchiveIterator::NewArchiveIterator(std::string *NewFilename, StringRef Name)
- : IsNewMember(true), Name(Name), NewFilename(*NewFilename) {}
+ : IsNewMember(true), Name(Name), NewFilename(*NewFilename), NewFD(-1) {}
StringRef NewArchiveIterator::getName() const { return Name; }
@@ -432,6 +443,30 @@ const char *NewArchiveIterator::getNew() const {
return NewFilename.c_str();
}
+int NewArchiveIterator::getFD() const {
+ assert(IsNewMember);
+ if (NewFD != -1)
+ return 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;
+}
+
+const sys::fs::file_status &NewArchiveIterator::getStatus() const {
+ assert(IsNewMember);
+ assert(NewFD != -1 && "Must call getFD first");
+ return NewStatus;
+}
+
template <typename T>
void addMember(std::vector<NewArchiveIterator> &Members, T I, StringRef Name,
int Pos = -1) {
@@ -442,16 +477,6 @@ void addMember(std::vector<NewArchiveIterator> &Members, T I, StringRef Name,
Members[Pos] = NI;
}
-namespace {
-class HasName {
- StringRef Name;
-
-public:
- HasName(StringRef Name) : Name(Name) {}
- bool operator()(StringRef Path) { return Name == sys::path::filename(Path); }
-};
-}
-
enum InsertAction {
IA_AddOldMember,
IA_AddNewMeber,
@@ -467,8 +492,9 @@ computeInsertAction(ArchiveOperation Operation,
if (Operation == QuickAppend || Members.empty())
return IA_AddOldMember;
- std::vector<std::string>::iterator MI =
- std::find_if(Members.begin(), Members.end(), HasName(Name));
+ std::vector<std::string>::iterator MI = std::find_if(
+ Members.begin(), Members.end(),
+ [Name](StringRef Path) { return Name == sys::path::filename(Path); });
if (MI == Members.end())
return IA_AddOldMember;
@@ -492,7 +518,7 @@ computeInsertAction(ArchiveOperation Operation,
// We could try to optimize this to a fstat, but it is not a common
// operation.
sys::fs::file_status Status;
- failIfError(sys::fs::status(*MI, Status));
+ failIfError(sys::fs::status(*MI, Status), *MI);
if (Status.getLastModificationTime() < I->getLastModified()) {
if (PosName.empty())
return IA_AddOldMember;
@@ -516,12 +542,13 @@ computeNewArchiveMembers(ArchiveOperation Operation,
int InsertPos = -1;
StringRef PosName = sys::path::filename(RelPos);
if (OldArchive) {
- for (object::Archive::child_iterator I = OldArchive->begin_children(),
- E = OldArchive->end_children();
+ for (object::Archive::child_iterator I = OldArchive->child_begin(),
+ E = OldArchive->child_end();
I != E; ++I) {
int Pos = Ret.size();
- StringRef Name;
- failIfError(I->getName(Name));
+ ErrorOr<StringRef> NameOrErr = I->getName();
+ failIfError(NameOrErr.getError());
+ StringRef Name = NameOrErr.get();
if (Name == PosName) {
assert(AddAfter || AddBefore);
if (AddBefore)
@@ -578,14 +605,21 @@ computeNewArchiveMembers(ArchiveOperation Operation,
}
template <typename T>
-static void printWithSpacePadding(raw_ostream &OS, T Data, unsigned Size) {
+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;
- assert(Size >= SizeSoFar && "Data doesn't fit in Size");
- unsigned Remaining = Size - SizeSoFar;
- for (unsigned I = 0; I < Remaining; ++I)
- OS << ' ';
+ 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) {
@@ -600,8 +634,8 @@ static void printRestOfMemberHeader(raw_fd_ostream &Out,
unsigned GID, unsigned Perms,
unsigned Size) {
printWithSpacePadding(Out, ModTime.toEpochTime(), 12);
- printWithSpacePadding(Out, UID, 6);
- printWithSpacePadding(Out, GID, 6);
+ printWithSpacePadding(Out, UID, 6, true);
+ printWithSpacePadding(Out, GID, 6, true);
printWithSpacePadding(Out, format("%o", Perms), 8);
printWithSpacePadding(Out, Size, 10);
Out << "`\n";
@@ -650,73 +684,50 @@ static void writeStringTable(raw_fd_ostream &Out,
Out.seek(Pos);
}
-static void writeSymbolTable(
- raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
- std::vector<std::pair<unsigned, unsigned> > &MemberOffsetRefs) {
+static void
+writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
+ MutableArrayRef<std::unique_ptr<MemoryBuffer>> Buffers,
+ std::vector<std::pair<unsigned, unsigned>> &MemberOffsetRefs) {
unsigned StartOffset = 0;
unsigned MemberNum = 0;
- std::vector<StringRef> SymNames;
- std::vector<object::ObjectFile *> DeleteIt;
+ 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) {
- object::ObjectFile *Obj;
- if (I->isNewMember()) {
- const char *Filename = I->getNew();
- Obj = object::ObjectFile::createObjectFile(Filename);
- } else {
- object::Archive::child_iterator OldMember = I->getOld();
- OwningPtr<object::Binary> Binary;
- error_code EC = OldMember->getAsBinary(Binary);
- if (EC) { // FIXME: check only for "not an object file" errors.
- Obj = NULL;
- } else {
- Obj = dyn_cast<object::ObjectFile>(Binary.get());
- if (Obj)
- Binary.take();
- }
- }
- if (!Obj)
- continue;
- DeleteIt.push_back(Obj);
+ std::unique_ptr<MemoryBuffer> &MemberBuffer = Buffers[MemberNum];
+ ErrorOr<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.
+ std::unique_ptr<object::SymbolicFile> Obj(ObjOrErr.get());
+
if (!StartOffset) {
printMemberHeader(Out, "", sys::TimeValue::now(), 0, 0, 0, 0);
StartOffset = Out.tell();
print32BE(Out, 0);
}
- error_code Err;
- for (object::symbol_iterator I = Obj->begin_symbols(),
- E = Obj->end_symbols();
- I != E; I.increment(Err), failIfError(Err)) {
- uint32_t Symflags;
- failIfError(I->getFlags(Symflags));
+ 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;
- StringRef Name;
- failIfError(I->getName(Name));
- SymNames.push_back(Name);
+ failIfError(S.printName(NameOS));
+ NameOS << '\0';
+ ++NumSyms;
MemberOffsetRefs.push_back(std::make_pair(Out.tell(), MemberNum));
print32BE(Out, 0);
}
+ MemberBuffer.reset(Obj->releaseBuffer());
}
- for (std::vector<StringRef>::iterator I = SymNames.begin(),
- E = SymNames.end();
- I != E; ++I) {
- Out << *I;
- Out << '\0';
- }
-
- for (std::vector<object::ObjectFile *>::iterator I = DeleteIt.begin(),
- E = DeleteIt.end();
- I != E; ++I) {
- object::ObjectFile *O = *I;
- delete O;
- }
+ Out << NameOS.str();
if (StartOffset == 0)
return;
@@ -728,7 +739,7 @@ static void writeSymbolTable(
Out.seek(StartOffset - 12);
printWithSpacePadding(Out, Pos - StartOffset, 10);
Out.seek(StartOffset);
- print32BE(Out, SymNames.size());
+ print32BE(Out, NumSyms);
Out.seek(Pos);
}
@@ -748,8 +759,33 @@ static void performWriteOperation(ArchiveOperation Operation,
std::vector<std::pair<unsigned, unsigned> > MemberOffsetRefs;
+ std::vector<std::unique_ptr<MemoryBuffer>> MemberBuffers;
+ MemberBuffers.resize(NewMembers.size());
+
+ for (unsigned I = 0, N = NewMembers.size(); I < N; ++I) {
+ std::unique_ptr<MemoryBuffer> MemberBuffer;
+ NewArchiveIterator &Member = NewMembers[I];
+
+ if (Member.isNewMember()) {
+ const char *Filename = Member.getNew();
+ int FD = Member.getFD();
+ const sys::fs::file_status &Status = Member.getStatus();
+ ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
+ MemoryBuffer::getOpenFile(FD, Filename, Status.getSize(), false);
+ failIfError(MemberBufferOrErr.getError(), Filename);
+ MemberBuffer = std::move(MemberBufferOrErr.get());
+ } else {
+ object::Archive::child_iterator OldMember = Member.getOld();
+ ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
+ OldMember->getMemoryBuffer();
+ failIfError(MemberBufferOrErr.getError());
+ MemberBuffer = std::move(MemberBufferOrErr.get());
+ }
+ MemberBuffers[I].reset(MemberBuffer.release());
+ }
+
if (Symtab) {
- writeSymbolTable(Out, NewMembers, MemberOffsetRefs);
+ writeSymbolTable(Out, NewMembers, MemberBuffers, MemberOffsetRefs);
}
std::vector<unsigned> StringMapIndexes;
@@ -773,26 +809,10 @@ static void performWriteOperation(ArchiveOperation Operation,
}
Out.seek(Pos);
+ const MemoryBuffer *File = MemberBuffers[MemberNum].get();
if (I->isNewMember()) {
const char *FileName = I->getNew();
-
- int FD;
- failIfError(sys::fs::openFileForRead(FileName, FD), FileName);
-
- sys::fs::file_status Status;
- failIfError(sys::fs::status(FD, Status), FileName);
-
- // Opening a directory doesn't make sense. Let it failed.
- // Linux cannot open directories with open(2), although
- // cygwin and *bsd can.
- if (Status.type() == sys::fs::file_type::directory_file)
- failIfError(error_code(errc::is_a_directory, posix_category()),
- FileName);
-
- OwningPtr<MemoryBuffer> File;
- failIfError(MemoryBuffer::getOpenFile(FD, FileName, File,
- Status.getSize(), false),
- FileName);
+ const sys::fs::file_status &Status = I->getStatus();
StringRef Name = sys::path::filename(FileName);
if (Name.size() < 16)
@@ -804,7 +824,6 @@ static void performWriteOperation(ArchiveOperation Operation,
Status.getLastModificationTime(), Status.getUser(),
Status.getGroup(), Status.permissions(),
Status.getSize());
- Out << File->getBuffer();
} else {
object::Archive::child_iterator OldMember = I->getOld();
StringRef Name = I->getName();
@@ -818,16 +837,18 @@ static void performWriteOperation(ArchiveOperation Operation,
OldMember->getLastModified(), OldMember->getUID(),
OldMember->getGID(), OldMember->getAccessMode(),
OldMember->getSize());
- Out << OldMember->getBuffer();
}
+ Out << File->getBuffer();
+
if (Out.tell() % 2)
Out << '\n';
}
+
Output.keep();
Out.close();
sys::fs::rename(TemporaryOutput, ArchiveName);
- TemporaryOutput = NULL;
+ TemporaryOutput = nullptr;
}
static void createSymbolTable(object::Archive *OldArchive) {
@@ -883,6 +904,10 @@ int main(int argc, char **argv) {
" This program archives bitcode files into single libraries\n"
);
+ llvm::InitializeAllTargetInfos();
+ llvm::InitializeAllTargetMCs();
+ llvm::InitializeAllAsmParsers();
+
StringRef Stem = sys::path::stem(ToolName);
if (Stem.find("ar") != StringRef::npos)
return ar_main(argv);
@@ -909,16 +934,17 @@ int ar_main(char **argv) {
static int performOperation(ArchiveOperation Operation) {
// Create or open the archive object.
- OwningPtr<MemoryBuffer> Buf;
- error_code EC = MemoryBuffer::getFile(ArchiveName, Buf, -1, false);
- if (EC && EC != llvm::errc::no_such_file_or_directory) {
+ ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
+ MemoryBuffer::getFile(ArchiveName, -1, false);
+ std::error_code EC = Buf.getError();
+ if (EC && EC != errc::no_such_file_or_directory) {
errs() << ToolName << ": error opening '" << ArchiveName
<< "': " << EC.message() << "!\n";
return 1;
}
if (!EC) {
- object::Archive Archive(Buf.take(), EC);
+ object::Archive Archive(std::move(Buf.get()), EC);
if (EC) {
errs() << ToolName << ": error loading '" << ArchiveName
@@ -929,7 +955,7 @@ static int performOperation(ArchiveOperation Operation) {
return 0;
}
- assert(EC == llvm::errc::no_such_file_or_directory);
+ assert(EC == errc::no_such_file_or_directory);
if (!shouldCreateArchive(Operation)) {
failIfError(EC, Twine("error loading '") + ArchiveName + "'");
@@ -940,6 +966,6 @@ static int performOperation(ArchiveOperation Operation) {
}
}
- performOperation(Operation, NULL);
+ performOperation(Operation, nullptr);
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-07 04:46:05 +0000