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llvm-mirror/tools/llvm-ar/llvm-ar.cpp
Chandler Carruth ae65e281f3 Update the file headers across all of the LLVM projects in the monorepo 
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00

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//===-- llvm-ar.cpp - LLVM archive librarian utility ----------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Builds up (relatively) standard unix archive files (.a) containing LLVM
// bitcode or other files.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/ArchiveWriter.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Chrono.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/LineIterator.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/StringSaver.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ToolDrivers/llvm-dlltool/DlltoolDriver.h"
#include "llvm/ToolDrivers/llvm-lib/LibDriver.h"
#if !defined(_MSC_VER) && !defined(__MINGW32__)
#include <unistd.h>
#else
#include <io.h>
#endif
using namespace llvm;
// The name this program was invoked as.
static StringRef ToolName;
// The basename of this program.
static StringRef Stem;
const char RanlibHelp[] = R"(
OVERVIEW: LLVM Ranlib (llvm-ranlib)
This program generates an index to speed access to archives
USAGE: llvm-ranlib <archive-file>
OPTIONS:
-help - Display available options
-version - Display the version of this program
)";
const char ArHelp[] = R"(
OVERVIEW: LLVM Archiver
USAGE: llvm-ar [options] [-]<operation>[modifiers] [relpos] <archive> [files]
llvm-ar -M [<mri-script]
OPTIONS:
--format - Archive format to create
=default - default
=gnu - gnu
=darwin - darwin
=bsd - bsd
--plugin=<string> - Ignored for compatibility
--help - Display available options
--version - Display the version of this program
OPERATIONS:
d - delete [files] from the archive
m - move [files] in the archive
p - print [files] found in the archive
q - quick append [files] to the archive
r - replace or insert [files] into the archive
s - act as ranlib
t - display contents of archive
x - extract [files] from the archive
MODIFIERS:
[a] - put [files] after [relpos]
[b] - put [files] before [relpos] (same as [i])
[c] - do not warn if archive had to be created
[D] - use zero for timestamps and uids/gids (default)
[i] - put [files] before [relpos] (same as [b])
[l] - ignored for compatibility
[L] - add archive's contents
[o] - preserve original dates
[s] - create an archive index (cf. ranlib)
[S] - do not build a symbol table
[T] - create a thin archive
[u] - update only [files] newer than archive contents
[U] - use actual timestamps and uids/gids
[v] - be verbose about actions taken
)";
void printHelpMessage() {
if (Stem.contains_lower("ranlib"))
outs() << RanlibHelp;
else if (Stem.contains_lower("ar"))
outs() << ArHelp;
}
// Show the error message and exit.
LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) {
WithColor::error(errs(), ToolName) << Error << ".\n";
printHelpMessage();
exit(1);
}
static void failIfError(std::error_code EC, Twine Context = "") {
if (!EC)
return;
std::string ContextStr = Context.str();
if (ContextStr.empty())
fail(EC.message());
fail(Context + ": " + EC.message());
}
static void failIfError(Error E, Twine Context = "") {
if (!E)
return;
handleAllErrors(std::move(E), [&](const llvm::ErrorInfoBase &EIB) {
std::string ContextStr = Context.str();
if (ContextStr.empty())
fail(EIB.message());
fail(Context + ": " + EIB.message());
});
}
static SmallVector<const char *, 256> PositionalArgs;
static bool MRI;
namespace {
enum Format { Default, GNU, BSD, DARWIN, Unknown };
}
static Format FormatType = Default;
static std::string Options;
// This enumeration delineates the kinds of operations on an archive
// that are permitted.
enum ArchiveOperation {
Print, ///< Print the contents of the archive
Delete, ///< Delete the specified members
Move, ///< Move members to end or as given by {a,b,i} modifiers
QuickAppend, ///< Quickly append to end of archive
ReplaceOrInsert, ///< Replace or Insert members
DisplayTable, ///< Display the table of contents
Extract, ///< Extract files back to file system
CreateSymTab ///< Create a symbol table in an existing archive
};
// Modifiers to follow operation to vary behavior
static bool AddAfter = false; ///< 'a' modifier
static bool AddBefore = false; ///< 'b' modifier
static bool Create = false; ///< 'c' modifier
static bool OriginalDates = false; ///< 'o' modifier
static bool OnlyUpdate = false; ///< 'u' modifier
static bool Verbose = false; ///< 'v' modifier
static bool Symtab = true; ///< 's' modifier
static bool Deterministic = true; ///< 'D' and 'U' modifiers
static bool Thin = false; ///< 'T' modifier
static bool AddLibrary = false; ///< 'L' modifier
// Relative Positional Argument (for insert/move). This variable holds
// the name of the archive member to which the 'a', 'b' or 'i' modifier
// refers. Only one of 'a', 'b' or 'i' can be specified so we only need
// one variable.
static std::string RelPos;
// This variable holds the name of the archive file as given on the
// command line.
static std::string ArchiveName;
// This variable holds the list of member files to proecess, as given
// on the command line.
static std::vector<StringRef> Members;
// Extract the member filename from the command line for the [relpos] argument
// associated with a, b, and i modifiers
static void getRelPos() {
if (PositionalArgs.empty())
fail("Expected [relpos] for a, b, or i modifier");
RelPos = PositionalArgs[0];
PositionalArgs.erase(PositionalArgs.begin());
}
// Get the archive file name from the command line
static void getArchive() {
if (PositionalArgs.empty())
fail("An archive name must be specified");
ArchiveName = PositionalArgs[0];
PositionalArgs.erase(PositionalArgs.begin());
}
// Copy over remaining items in PositionalArgs to our Members vector
static void getMembers() {
for (auto &Arg : PositionalArgs)
Members.push_back(Arg);
}
std::vector<std::unique_ptr<MemoryBuffer>> ArchiveBuffers;
std::vector<std::unique_ptr<object::Archive>> Archives;
static object::Archive &readLibrary(const Twine &Library) {
auto BufOrErr = MemoryBuffer::getFile(Library, -1, false);
failIfError(BufOrErr.getError(), "Could not open library " + Library);
ArchiveBuffers.push_back(std::move(*BufOrErr));
auto LibOrErr =
object::Archive::create(ArchiveBuffers.back()->getMemBufferRef());
failIfError(errorToErrorCode(LibOrErr.takeError()),
"Could not parse library");
Archives.push_back(std::move(*LibOrErr));
return *Archives.back();
}
static void runMRIScript();
// Parse the command line options as presented and return the operation
// specified. Process all modifiers and check to make sure that constraints on
// modifier/operation pairs have not been violated.
static ArchiveOperation parseCommandLine() {
if (MRI) {
if (!PositionalArgs.empty() || !Options.empty())
fail("Cannot mix -M and other options");
runMRIScript();
}
// Keep track of number of operations. We can only specify one
// per execution.
unsigned NumOperations = 0;
// Keep track of the number of positional modifiers (a,b,i). Only
// one can be specified.
unsigned NumPositional = 0;
// Keep track of which operation was requested
ArchiveOperation Operation;
bool MaybeJustCreateSymTab = false;
for (unsigned i = 0; i < Options.size(); ++i) {
switch (Options[i]) {
case 'd':
++NumOperations;
Operation = Delete;
break;
case 'm':
++NumOperations;
Operation = Move;
break;
case 'p':
++NumOperations;
Operation = Print;
break;
case 'q':
++NumOperations;
Operation = QuickAppend;
break;
case 'r':
++NumOperations;
Operation = ReplaceOrInsert;
break;
case 't':
++NumOperations;
Operation = DisplayTable;
break;
case 'x':
++NumOperations;
Operation = Extract;
break;
case 'c':
Create = true;
break;
case 'l': /* accepted but unused */
break;
case 'o':
OriginalDates = true;
break;
case 's':
Symtab = true;
MaybeJustCreateSymTab = true;
break;
case 'S':
Symtab = false;
break;
case 'u':
OnlyUpdate = true;
break;
case 'v':
Verbose = true;
break;
case 'a':
getRelPos();
AddAfter = true;
NumPositional++;
break;
case 'b':
getRelPos();
AddBefore = true;
NumPositional++;
break;
case 'i':
getRelPos();
AddBefore = true;
NumPositional++;
break;
case 'D':
Deterministic = true;
break;
case 'U':
Deterministic = false;
break;
case 'T':
Thin = true;
break;
case 'L':
AddLibrary = true;
break;
default:
fail(std::string("unknown option ") + Options[i]);
}
}
// At this point, the next thing on the command line must be
// the archive name.
getArchive();
// Everything on the command line at this point is a member.
getMembers();
if (NumOperations == 0 && MaybeJustCreateSymTab) {
NumOperations = 1;
Operation = CreateSymTab;
if (!Members.empty())
fail("The s operation takes only an archive as argument");
}
// Perform various checks on the operation/modifier specification
// to make sure we are dealing with a legal request.
if (NumOperations == 0)
fail("You must specify at least one of the operations");
if (NumOperations > 1)
fail("Only one operation may be specified");
if (NumPositional > 1)
fail("You may only specify one of a, b, and i modifiers");
if (AddAfter || AddBefore) {
if (Operation != Move && Operation != ReplaceOrInsert)
fail("The 'a', 'b' and 'i' modifiers can only be specified with "
"the 'm' or 'r' operations");
}
if (OriginalDates && Operation != Extract)
fail("The 'o' modifier is only applicable to the 'x' operation");
if (OnlyUpdate && Operation != ReplaceOrInsert)
fail("The 'u' modifier is only applicable to the 'r' operation");
if (AddLibrary && Operation != QuickAppend)
fail("The 'L' modifier is only applicable to the 'q' operation");
// Return the parsed operation to the caller
return Operation;
}
// Implements the 'p' operation. This function traverses the archive
// looking for members that match the path list.
static void doPrint(StringRef Name, const object::Archive::Child &C) {
if (Verbose)
outs() << "Printing " << Name << "\n";
Expected<StringRef> DataOrErr = C.getBuffer();
failIfError(DataOrErr.takeError());
StringRef Data = *DataOrErr;
outs().write(Data.data(), Data.size());
}
// Utility function for printing out the file mode when the 't' operation is in
// verbose mode.
static void printMode(unsigned mode) {
outs() << ((mode & 004) ? "r" : "-");
outs() << ((mode & 002) ? "w" : "-");
outs() << ((mode & 001) ? "x" : "-");
}
// Implement the 't' operation. This function prints out just
// the file names of each of the members. However, if verbose mode is requested
// ('v' modifier) then the file type, permission mode, user, group, size, and
// modification time are also printed.
static void doDisplayTable(StringRef Name, const object::Archive::Child &C) {
if (Verbose) {
Expected<sys::fs::perms> ModeOrErr = C.getAccessMode();
failIfError(ModeOrErr.takeError());
sys::fs::perms Mode = ModeOrErr.get();
printMode((Mode >> 6) & 007);
printMode((Mode >> 3) & 007);
printMode(Mode & 007);
Expected<unsigned> UIDOrErr = C.getUID();
failIfError(UIDOrErr.takeError());
outs() << ' ' << UIDOrErr.get();
Expected<unsigned> GIDOrErr = C.getGID();
failIfError(GIDOrErr.takeError());
outs() << '/' << GIDOrErr.get();
Expected<uint64_t> Size = C.getSize();
failIfError(Size.takeError());
outs() << ' ' << format("%6llu", Size.get());
auto ModTimeOrErr = C.getLastModified();
failIfError(ModTimeOrErr.takeError());
// Note: formatv() only handles the default TimePoint<>, which is in
// nanoseconds.
// TODO: fix format_provider<TimePoint<>> to allow other units.
sys::TimePoint<> ModTimeInNs = ModTimeOrErr.get();
outs() << ' ' << formatv("{0:%b %e %H:%M %Y}", ModTimeInNs);
outs() << ' ';
}
if (C.getParent()->isThin()) {
outs() << sys::path::parent_path(ArchiveName);
outs() << '/';
}
outs() << Name << "\n";
}
// Implement the 'x' operation. This function extracts files back to the file
// system.
static void doExtract(StringRef Name, const object::Archive::Child &C) {
// Retain the original mode.
Expected<sys::fs::perms> ModeOrErr = C.getAccessMode();
failIfError(ModeOrErr.takeError());
sys::fs::perms Mode = ModeOrErr.get();
int FD;
failIfError(sys::fs::openFileForWrite(sys::path::filename(Name), FD,
sys::fs::CD_CreateAlways,
sys::fs::F_None, Mode),
Name);
{
raw_fd_ostream file(FD, false);
// Get the data and its length
Expected<StringRef> BufOrErr = C.getBuffer();
failIfError(BufOrErr.takeError());
StringRef Data = BufOrErr.get();
// Write the data.
file.write(Data.data(), Data.size());
}
// If we're supposed to retain the original modification times, etc. do so
// now.
if (OriginalDates) {
auto ModTimeOrErr = C.getLastModified();
failIfError(ModTimeOrErr.takeError());
failIfError(
sys::fs::setLastAccessAndModificationTime(FD, ModTimeOrErr.get()));
}
if (close(FD))
fail("Could not close the file");
}
static bool shouldCreateArchive(ArchiveOperation Op) {
switch (Op) {
case Print:
case Delete:
case Move:
case DisplayTable:
case Extract:
case CreateSymTab:
return false;
case QuickAppend:
case ReplaceOrInsert:
return true;
}
llvm_unreachable("Missing entry in covered switch.");
}
static void performReadOperation(ArchiveOperation Operation,
object::Archive *OldArchive) {
if (Operation == Extract && OldArchive->isThin())
fail("extracting from a thin archive is not supported");
bool Filter = !Members.empty();
{
Error Err = Error::success();
for (auto &C : OldArchive->children(Err)) {
Expected<StringRef> NameOrErr = C.getName();
failIfError(NameOrErr.takeError());
StringRef Name = NameOrErr.get();
if (Filter) {
auto I = find(Members, Name);
if (I == Members.end())
continue;
Members.erase(I);
}
switch (Operation) {
default:
llvm_unreachable("Not a read operation");
case Print:
doPrint(Name, C);
break;
case DisplayTable:
doDisplayTable(Name, C);
break;
case Extract:
doExtract(Name, C);
break;
}
}
failIfError(std::move(Err));
}
if (Members.empty())
return;
for (StringRef Name : Members)
WithColor::error(errs(), ToolName) << "'" << Name << "' was not found\n";
exit(1);
}
static void addChildMember(std::vector<NewArchiveMember> &Members,
const object::Archive::Child &M,
bool FlattenArchive = false) {
if (Thin && !M.getParent()->isThin())
fail("Cannot convert a regular archive to a thin one");
Expected<NewArchiveMember> NMOrErr =
NewArchiveMember::getOldMember(M, Deterministic);
failIfError(NMOrErr.takeError());
if (FlattenArchive &&
identify_magic(NMOrErr->Buf->getBuffer()) == file_magic::archive) {
Expected<std::string> FileNameOrErr = M.getFullName();
failIfError(FileNameOrErr.takeError());
object::Archive &Lib = readLibrary(*FileNameOrErr);
// When creating thin archives, only flatten if the member is also thin.
if (!Thin || Lib.isThin()) {
Error Err = Error::success();
// Only Thin archives are recursively flattened.
for (auto &Child : Lib.children(Err))
addChildMember(Members, Child, /*FlattenArchive=*/Thin);
failIfError(std::move(Err));
return;
}
}
Members.push_back(std::move(*NMOrErr));
}
static void addMember(std::vector<NewArchiveMember> &Members,
StringRef FileName, bool FlattenArchive = false) {
Expected<NewArchiveMember> NMOrErr =
NewArchiveMember::getFile(FileName, Deterministic);
failIfError(NMOrErr.takeError(), FileName);
if (FlattenArchive &&
identify_magic(NMOrErr->Buf->getBuffer()) == file_magic::archive) {
object::Archive &Lib = readLibrary(FileName);
// When creating thin archives, only flatten if the member is also thin.
if (!Thin || Lib.isThin()) {
Error Err = Error::success();
// Only Thin archives are recursively flattened.
for (auto &Child : Lib.children(Err))
addChildMember(Members, Child, /*FlattenArchive=*/Thin);
failIfError(std::move(Err));
return;
}
}
// Use the basename of the object path for the member name.
NMOrErr->MemberName = sys::path::filename(NMOrErr->MemberName);
Members.push_back(std::move(*NMOrErr));
}
enum InsertAction {
IA_AddOldMember,
IA_AddNewMember,
IA_Delete,
IA_MoveOldMember,
IA_MoveNewMember
};
static InsertAction computeInsertAction(ArchiveOperation Operation,
const object::Archive::Child &Member,
StringRef Name,
std::vector<StringRef>::iterator &Pos) {
if (Operation == QuickAppend || Members.empty())
return IA_AddOldMember;
auto MI = find_if(Members, [Name](StringRef Path) {
return Name == sys::path::filename(Path);
});
if (MI == Members.end())
return IA_AddOldMember;
Pos = MI;
if (Operation == Delete)
return IA_Delete;
if (Operation == Move)
return IA_MoveOldMember;
if (Operation == ReplaceOrInsert) {
StringRef PosName = sys::path::filename(RelPos);
if (!OnlyUpdate) {
if (PosName.empty())
return IA_AddNewMember;
return IA_MoveNewMember;
}
// 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), *MI);
auto ModTimeOrErr = Member.getLastModified();
failIfError(ModTimeOrErr.takeError());
if (Status.getLastModificationTime() < ModTimeOrErr.get()) {
if (PosName.empty())
return IA_AddOldMember;
return IA_MoveOldMember;
}
if (PosName.empty())
return IA_AddNewMember;
return IA_MoveNewMember;
}
llvm_unreachable("No such operation");
}
// We have to walk this twice and computing it is not trivial, so creating an
// explicit std::vector is actually fairly efficient.
static std::vector<NewArchiveMember>
computeNewArchiveMembers(ArchiveOperation Operation,
object::Archive *OldArchive) {
std::vector<NewArchiveMember> Ret;
std::vector<NewArchiveMember> Moved;
int InsertPos = -1;
StringRef PosName = sys::path::filename(RelPos);
if (OldArchive) {
Error Err = Error::success();
for (auto &Child : OldArchive->children(Err)) {
int Pos = Ret.size();
Expected<StringRef> NameOrErr = Child.getName();
failIfError(NameOrErr.takeError());
StringRef Name = NameOrErr.get();
if (Name == PosName) {
assert(AddAfter || AddBefore);
if (AddBefore)
InsertPos = Pos;
else
InsertPos = Pos + 1;
}
std::vector<StringRef>::iterator MemberI = Members.end();
InsertAction Action =
computeInsertAction(Operation, Child, Name, MemberI);
switch (Action) {
case IA_AddOldMember:
addChildMember(Ret, Child);
break;
case IA_AddNewMember:
addMember(Ret, *MemberI);
break;
case IA_Delete:
break;
case IA_MoveOldMember:
addChildMember(Moved, Child);
break;
case IA_MoveNewMember:
addMember(Moved, *MemberI);
break;
}
if (MemberI != Members.end())
Members.erase(MemberI);
}
failIfError(std::move(Err));
}
if (Operation == Delete)
return Ret;
if (!RelPos.empty() && InsertPos == -1)
fail("Insertion point not found");
if (RelPos.empty())
InsertPos = Ret.size();
assert(unsigned(InsertPos) <= Ret.size());
int Pos = InsertPos;
for (auto &M : Moved) {
Ret.insert(Ret.begin() + Pos, std::move(M));
++Pos;
}
if (AddLibrary) {
assert(Operation == QuickAppend);
for (auto &Member : Members)
addMember(Ret, Member, /*FlattenArchive=*/true);
return Ret;
}
std::vector<NewArchiveMember> NewMembers;
for (auto &Member : Members)
addMember(NewMembers, Member, /*FlattenArchive=*/Thin);
Ret.reserve(Ret.size() + NewMembers.size());
std::move(NewMembers.begin(), NewMembers.end(),
std::inserter(Ret, std::next(Ret.begin(), InsertPos)));
return Ret;
}
static object::Archive::Kind getDefaultForHost() {
return Triple(sys::getProcessTriple()).isOSDarwin()
? object::Archive::K_DARWIN
: object::Archive::K_GNU;
}
static object::Archive::Kind getKindFromMember(const NewArchiveMember &Member) {
Expected<std::unique_ptr<object::ObjectFile>> OptionalObject =
object::ObjectFile::createObjectFile(Member.Buf->getMemBufferRef());
if (OptionalObject)
return isa<object::MachOObjectFile>(**OptionalObject)
? object::Archive::K_DARWIN
: object::Archive::K_GNU;
// squelch the error in case we had a non-object file
consumeError(OptionalObject.takeError());
return getDefaultForHost();
}
static void performWriteOperation(ArchiveOperation Operation,
object::Archive *OldArchive,
std::unique_ptr<MemoryBuffer> OldArchiveBuf,
std::vector<NewArchiveMember> *NewMembersP) {
std::vector<NewArchiveMember> NewMembers;
if (!NewMembersP)
NewMembers = computeNewArchiveMembers(Operation, OldArchive);
object::Archive::Kind Kind;
switch (FormatType) {
case Default:
if (Thin)
Kind = object::Archive::K_GNU;
else if (OldArchive)
Kind = OldArchive->kind();
else if (NewMembersP)
Kind = !NewMembersP->empty() ? getKindFromMember(NewMembersP->front())
: getDefaultForHost();
else
Kind = !NewMembers.empty() ? getKindFromMember(NewMembers.front())
: getDefaultForHost();
break;
case GNU:
Kind = object::Archive::K_GNU;
break;
case BSD:
if (Thin)
fail("Only the gnu format has a thin mode");
Kind = object::Archive::K_BSD;
break;
case DARWIN:
if (Thin)
fail("Only the gnu format has a thin mode");
Kind = object::Archive::K_DARWIN;
break;
case Unknown:
llvm_unreachable("");
}
Error E =
writeArchive(ArchiveName, NewMembersP ? *NewMembersP : NewMembers, Symtab,
Kind, Deterministic, Thin, std::move(OldArchiveBuf));
failIfError(std::move(E), ArchiveName);
}
static void createSymbolTable(object::Archive *OldArchive) {
// When an archive is created or modified, if the s option is given, the
// resulting archive will have a current symbol table. If the S option
// is given, it will have no symbol table.
// In summary, we only need to update the symbol table if we have none.
// This is actually very common because of broken build systems that think
// they have to run ranlib.
if (OldArchive->hasSymbolTable())
return;
performWriteOperation(CreateSymTab, OldArchive, nullptr, nullptr);
}
static void performOperation(ArchiveOperation Operation,
object::Archive *OldArchive,
std::unique_ptr<MemoryBuffer> OldArchiveBuf,
std::vector<NewArchiveMember> *NewMembers) {
switch (Operation) {
case Print:
case DisplayTable:
case Extract:
performReadOperation(Operation, OldArchive);
return;
case Delete:
case Move:
case QuickAppend:
case ReplaceOrInsert:
performWriteOperation(Operation, OldArchive, std::move(OldArchiveBuf),
NewMembers);
return;
case CreateSymTab:
createSymbolTable(OldArchive);
return;
}
llvm_unreachable("Unknown operation.");
}
static int performOperation(ArchiveOperation Operation,
std::vector<NewArchiveMember> *NewMembers) {
// Create or open the archive object.
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)
fail("error opening '" + ArchiveName + "': " + EC.message() + "!");
if (!EC) {
Error Err = Error::success();
object::Archive Archive(Buf.get()->getMemBufferRef(), Err);
EC = errorToErrorCode(std::move(Err));
failIfError(EC,
"error loading '" + ArchiveName + "': " + EC.message() + "!");
performOperation(Operation, &Archive, std::move(Buf.get()), NewMembers);
return 0;
}
assert(EC == errc::no_such_file_or_directory);
if (!shouldCreateArchive(Operation)) {
failIfError(EC, Twine("error loading '") + ArchiveName + "'");
} else {
if (!Create) {
// Produce a warning if we should and we're creating the archive
WithColor::warning(errs(), ToolName)
<< "creating " << ArchiveName << "\n";
}
}
performOperation(Operation, nullptr, nullptr, NewMembers);
return 0;
}
static void runMRIScript() {
enum class MRICommand { AddLib, AddMod, Create, Delete, Save, End, Invalid };
ErrorOr<std::unique_ptr<MemoryBuffer>> Buf = MemoryBuffer::getSTDIN();
failIfError(Buf.getError());
const MemoryBuffer &Ref = *Buf.get();
bool Saved = false;
std::vector<NewArchiveMember> NewMembers;
for (line_iterator I(Ref, /*SkipBlanks*/ false), E; I != E; ++I) {
StringRef Line = *I;
Line = Line.split(';').first;
Line = Line.split('*').first;
Line = Line.trim();
if (Line.empty())
continue;
StringRef CommandStr, Rest;
std::tie(CommandStr, Rest) = Line.split(' ');
Rest = Rest.trim();
if (!Rest.empty() && Rest.front() == '"' && Rest.back() == '"')
Rest = Rest.drop_front().drop_back();
auto Command = StringSwitch<MRICommand>(CommandStr.lower())
.Case("addlib", MRICommand::AddLib)
.Case("addmod", MRICommand::AddMod)
.Case("create", MRICommand::Create)
.Case("delete", MRICommand::Delete)
.Case("save", MRICommand::Save)
.Case("end", MRICommand::End)
.Default(MRICommand::Invalid);
switch (Command) {
case MRICommand::AddLib: {
object::Archive &Lib = readLibrary(Rest);
{
Error Err = Error::success();
for (auto &Member : Lib.children(Err))
addChildMember(NewMembers, Member);
failIfError(std::move(Err));
}
break;
}
case MRICommand::AddMod:
addMember(NewMembers, Rest);
break;
case MRICommand::Create:
Create = true;
if (!ArchiveName.empty())
fail("Editing multiple archives not supported");
if (Saved)
fail("File already saved");
ArchiveName = Rest;
break;
case MRICommand::Delete: {
StringRef Name = sys::path::filename(Rest);
llvm::erase_if(NewMembers,
[=](NewArchiveMember &M) { return M.MemberName == Name; });
break;
}
case MRICommand::Save:
Saved = true;
break;
case MRICommand::End:
break;
case MRICommand::Invalid:
fail("Unknown command: " + CommandStr);
}
}
// Nothing to do if not saved.
if (Saved)
performOperation(ReplaceOrInsert, &NewMembers);
exit(0);
}
static bool handleGenericOption(StringRef arg) {
if (arg == "-help" || arg == "--help") {
printHelpMessage();
return true;
}
if (arg == "-version" || arg == "--version") {
cl::PrintVersionMessage();
return true;
}
return false;
}
static int ar_main(int argc, char **argv) {
SmallVector<const char *, 0> Argv(argv, argv + argc);
BumpPtrAllocator Alloc;
StringSaver Saver(Alloc);
cl::ExpandResponseFiles(Saver, cl::TokenizeGNUCommandLine, Argv);
for (size_t i = 1; i < Argv.size(); ++i) {
StringRef Arg = Argv[i];
const char *match;
auto MatchFlagWithArg = [&](const char *expected) {
size_t len = strlen(expected);
if (Arg == expected) {
if (++i >= Argv.size())
fail(std::string(expected) + " requires an argument");
match = Argv[i];
return true;
}
if (Arg.startswith(expected) && Arg.size() > len && Arg[len] == '=') {
match = Arg.data() + len + 1;
return true;
}
return false;
};
if (handleGenericOption(Argv[i]))
return 0;
if (Arg == "--") {
for (; i < Argv.size(); ++i)
PositionalArgs.push_back(Argv[i]);
break;
}
if (Arg[0] == '-') {
if (Arg.startswith("--"))
Arg = Argv[i] + 2;
else
Arg = Argv[i] + 1;
if (Arg == "M") {
MRI = true;
} else if (MatchFlagWithArg("format")) {
FormatType = StringSwitch<Format>(match)
.Case("default", Default)
.Case("gnu", GNU)
.Case("darwin", DARWIN)
.Case("bsd", BSD)
.Default(Unknown);
if (FormatType == Unknown)
fail(std::string("Invalid format ") + match);
} else if (MatchFlagWithArg("plugin")) {
// Ignored.
} else {
Options += Argv[i] + 1;
}
} else if (Options.empty()) {
Options += Argv[i];
} else {
PositionalArgs.push_back(Argv[i]);
}
}
ArchiveOperation Operation = parseCommandLine();
return performOperation(Operation, nullptr);
}
static int ranlib_main(int argc, char **argv) {
bool ArchiveSpecified = false;
for (int i = 1; i < argc; ++i) {
if (handleGenericOption(argv[i])) {
return 0;
} else {
if (ArchiveSpecified)
fail("Exactly one archive should be specified");
ArchiveSpecified = true;
ArchiveName = argv[i];
}
}
return performOperation(CreateSymTab, nullptr);
}
int main(int argc, char **argv) {
InitLLVM X(argc, argv);
ToolName = argv[0];
llvm::InitializeAllTargetInfos();
llvm::InitializeAllTargetMCs();
llvm::InitializeAllAsmParsers();
Stem = sys::path::stem(ToolName);
if (Stem.contains_lower("dlltool"))
return dlltoolDriverMain(makeArrayRef(argv, argc));
if (Stem.contains_lower("ranlib"))
return ranlib_main(argc, argv);
if (Stem.contains_lower("lib"))
return libDriverMain(makeArrayRef(argv, argc));
if (Stem.contains_lower("ar"))
return ar_main(argc, argv);
fail("Not ranlib, ar, lib or dlltool!");
}
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