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llvm-mirror/tools/llvm-ar/llvm-ar.cpp
Alex Richardson 70c1838d14 [llvm-ranlib] Handle -D and -U command line flag 
I have been trying to build CheriBSD (a fork for FreeBSD for the CHERI
CPU) with LLVM binutils instead of the default elftoolchain utilities.
I noticed that building static archives was failing because ranlib is
invoked with the -D flag. This failed with llvm-ranlib since it parses
the -D flag as the archive path and reports an error that more than one
archive has been passed.

This fixes https://llvm.org/PR41707

Reviewed By: rupprecht
Differential Revision: https://reviews.llvm.org/D71554
2020-01-02 13:44:05 +01:00

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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/StringExtras.h"
#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
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.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:
-h --help - Display available options
-v --version - Display the version of this program
-D - Use zero for timestamps and uids/gids (default)
-U - Use actual timestamps and uids/gids
)";
const char ArHelp[] = R"(OVERVIEW: LLVM Archiver
USAGE: llvm-ar [options] [-]<operation>[modifiers] [relpos] [count] <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
-h --help - display this help and exit
--version - print the version and exit
@<file> - read options from <file>
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)
[h] - display this help and exit
[i] - put [files] before [relpos] (same as [b])
[l] - ignored for compatibility
[L] - add archive's contents
[N] - use instance [count] of name
[o] - preserve original dates
[O] - display member offsets
[P] - use full names when matching (implied for thin archives)
[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
[V] - display the version and exit
)";
void printHelpMessage() {
if (Stem.contains_lower("ranlib"))
outs() << RanlibHelp;
else if (Stem.contains_lower("ar"))
outs() << ArHelp;
}
static unsigned MRILineNumber;
static bool ParsingMRIScript;
// Show the error plus the usage message, and exit.
LLVM_ATTRIBUTE_NORETURN static void badUsage(Twine Error) {
WithColor::error(errs(), ToolName) << Error << "\n";
printHelpMessage();
exit(1);
}
// Show the error message and exit.
LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) {
if (ParsingMRIScript) {
WithColor::error(errs(), ToolName)
<< "script line " << MRILineNumber << ": " << Error << "\n";
} else {
WithColor::error(errs(), ToolName) << Error << "\n";
}
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 DisplayMemberOffsets = false; ///< 'O' modifier
static bool CompareFullPath = false; ///< 'P' 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;
// Count parameter for 'N' modifier. This variable specifies which file should
// match for extract/delete operations when there are multiple matches. This is
// 1-indexed. A value of 0 is invalid, and implies 'N' is not used.
static int CountParam = 0;
// This variable holds the name of the archive file as given on the
// command line.
static std::string ArchiveName;
static std::vector<std::unique_ptr<MemoryBuffer>> ArchiveBuffers;
static std::vector<std::unique_ptr<object::Archive>> Archives;
// This variable holds the list of member files to proecess, as given
// on the command line.
static std::vector<StringRef> Members;
// Static buffer to hold StringRefs.
static BumpPtrAllocator Alloc;
// 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());
}
// Extract the parameter from the command line for the [count] argument
// associated with the N modifier
static void getCountParam() {
if (PositionalArgs.empty())
badUsage("expected [count] for 'N' modifier");
auto CountParamArg = StringRef(PositionalArgs[0]);
if (CountParamArg.getAsInteger(10, CountParam))
badUsage("value for [count] must be numeric, got: " + CountParamArg);
if (CountParam < 1)
badUsage("value for [count] must be positive, got: " + CountParamArg);
PositionalArgs.erase(PositionalArgs.begin());
}
// Get the archive file name from the command line
static void getArchive() {
if (PositionalArgs.empty())
badUsage("an archive name must be specified");
ArchiveName = PositionalArgs[0];
PositionalArgs.erase(PositionalArgs.begin());
}
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())
badUsage("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 'O':
DisplayMemberOffsets = true;
break;
case 'P':
CompareFullPath = 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 'N':
getCountParam();
break;
case 'T':
Thin = true;
// Thin archives store path names, so P should be forced.
CompareFullPath = true;
break;
case 'L':
AddLibrary = true;
break;
case 'V':
cl::PrintVersionMessage();
exit(0);
case 'h':
printHelpMessage();
exit(0);
default:
badUsage(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.
Members.assign(PositionalArgs.begin(), PositionalArgs.end());
if (NumOperations == 0 && MaybeJustCreateSymTab) {
NumOperations = 1;
Operation = CreateSymTab;
if (!Members.empty())
badUsage("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)
badUsage("you must specify at least one of the operations");
if (NumOperations > 1)
badUsage("only one operation may be specified");
if (NumPositional > 1)
badUsage("you may only specify one of 'a', 'b', and 'i' modifiers");
if (AddAfter || AddBefore)
if (Operation != Move && Operation != ReplaceOrInsert)
badUsage("the 'a', 'b' and 'i' modifiers can only be specified with "
"the 'm' or 'r' operations");
if (CountParam)
if (Operation != Extract && Operation != Delete)
badUsage("the 'N' modifier can only be specified with the 'x' or 'd' "
"operations");
if (OriginalDates && Operation != Extract)
badUsage("the 'o' modifier is only applicable to the 'x' operation");
if (OnlyUpdate && Operation != ReplaceOrInsert)
badUsage("the 'u' modifier is only applicable to the 'r' operation");
if (AddLibrary && Operation != QuickAppend)
badUsage("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()) {
if (!sys::path::is_absolute(Name)) {
StringRef ParentDir = sys::path::parent_path(ArchiveName);
if (!ParentDir.empty())
outs() << sys::path::convert_to_slash(ParentDir) << '/';
}
outs() << Name;
} else {
outs() << Name;
if (DisplayMemberOffsets)
outs() << " 0x" << utohexstr(C.getDataOffset(), true);
}
outs() << '\n';
}
static std::string normalizePath(StringRef Path) {
return CompareFullPath ? sys::path::convert_to_slash(Path)
: std::string(sys::path::filename(Path));
}
static bool comparePaths(StringRef Path1, StringRef Path2) {
// When on Windows this function calls CompareStringOrdinal
// as Windows file paths are case-insensitive.
// CompareStringOrdinal compares two Unicode strings for
// binary equivalence and allows for case insensitivity.
#ifdef _WIN32
SmallVector<wchar_t, 128> WPath1, WPath2;
failIfError(sys::path::widenPath(normalizePath(Path1), WPath1));
failIfError(sys::path::widenPath(normalizePath(Path2), WPath2));
return CompareStringOrdinal(WPath1.data(), WPath1.size(), WPath2.data(),
WPath2.size(), true) == CSTR_EQUAL;
#else
return normalizePath(Path1) == normalizePath(Path2);
#endif
}
// 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();
llvm::StringRef outputFilePath = sys::path::filename(Name);
if (Verbose)
outs() << "x - " << outputFilePath << '\n';
int FD;
failIfError(sys::fs::openFileForWrite(outputFilePath, FD,
sys::fs::CD_CreateAlways,
sys::fs::OF_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();
StringMap<int> MemberCount;
{
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_if(Members, [Name](StringRef Path) {
return comparePaths(Name, Path);
});
if (I == Members.end())
continue;
if (CountParam && ++MemberCount[Name] != CountParam)
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 the child member we're trying to add is thin, use the path relative to
// the archive it's in, so the file resolves correctly.
if (Thin && FlattenArchive) {
StringSaver Saver(Alloc);
Expected<std::string> FileNameOrErr = M.getName();
failIfError(FileNameOrErr.takeError());
if (sys::path::is_absolute(*FileNameOrErr)) {
NMOrErr->MemberName = Saver.save(sys::path::convert_to_slash(*FileNameOrErr));
} else {
FileNameOrErr = M.getFullName();
failIfError(FileNameOrErr.takeError());
Expected<std::string> PathOrErr =
computeArchiveRelativePath(ArchiveName, *FileNameOrErr);
NMOrErr->MemberName = Saver.save(
PathOrErr ? *PathOrErr : sys::path::convert_to_slash(*FileNameOrErr));
}
}
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);
StringSaver Saver(Alloc);
// For regular archives, use the basename of the object path for the member
// name. For thin archives, use the full relative paths so the file resolves
// correctly.
if (!Thin) {
NMOrErr->MemberName = sys::path::filename(NMOrErr->MemberName);
} else {
if (sys::path::is_absolute(FileName))
NMOrErr->MemberName = Saver.save(sys::path::convert_to_slash(FileName));
else {
Expected<std::string> PathOrErr =
computeArchiveRelativePath(ArchiveName, FileName);
NMOrErr->MemberName = Saver.save(
PathOrErr ? *PathOrErr : sys::path::convert_to_slash(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;
}
}
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,
StringMap<int> &MemberCount) {
if (Operation == QuickAppend || Members.empty())
return IA_AddOldMember;
auto MI = find_if(
Members, [Name](StringRef Path) { return comparePaths(Name, Path); });
if (MI == Members.end())
return IA_AddOldMember;
Pos = MI;
if (Operation == Delete) {
if (CountParam && ++MemberCount[Name] != CountParam)
return IA_AddOldMember;
return IA_Delete;
}
if (Operation == Move)
return IA_MoveOldMember;
if (Operation == ReplaceOrInsert) {
if (!OnlyUpdate) {
if (RelPos.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 (RelPos.empty())
return IA_AddOldMember;
return IA_MoveOldMember;
}
if (RelPos.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;
if (OldArchive) {
Error Err = Error::success();
StringMap<int> MemberCount;
for (auto &Child : OldArchive->children(Err)) {
int Pos = Ret.size();
Expected<StringRef> NameOrErr = Child.getName();
failIfError(NameOrErr.takeError());
std::string Name = NameOrErr.get();
if (comparePaths(Name, RelPos)) {
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, MemberCount);
switch (Action) {
case IA_AddOldMember:
addChildMember(Ret, Child, /*FlattenArchive=*/Thin);
break;
case IA_AddNewMember:
addMember(Ret, *MemberI);
break;
case IA_Delete:
break;
case IA_MoveOldMember:
addChildMember(Moved, Child, /*FlattenArchive=*/Thin);
break;
case IA_MoveNewMember:
addMember(Moved, *MemberI);
break;
}
// When processing elements with the count param, we need to preserve the
// full members list when iterating over all archive members. For
// instance, "llvm-ar dN 2 archive.a member.o" should delete the second
// file named member.o it sees; we are not done with member.o the first
// time we see it in the archive.
if (MemberI != Members.end() && !CountParam)
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);
failIfError(std::move(Err), "unable to load '" + ArchiveName + "'");
if (Archive.isThin())
CompareFullPath = true;
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, CreateThin, 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;
ParsingMRIScript = true;
for (line_iterator I(Ref, /*SkipBlanks*/ false), E; I != E; ++I) {
++MRILineNumber;
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("createthin", MRICommand::CreateThin)
.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, /*FlattenArchive=*/Thin);
failIfError(std::move(Err));
}
break;
}
case MRICommand::AddMod:
addMember(NewMembers, Rest);
break;
case MRICommand::CreateThin:
Thin = true;
LLVM_FALLTHROUGH;
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: {
llvm::erase_if(NewMembers, [=](NewArchiveMember &M) {
return comparePaths(M.MemberName, Rest);
});
break;
}
case MRICommand::Save:
Saved = true;
break;
case MRICommand::End:
break;
case MRICommand::Invalid:
fail("unknown command: " + CommandStr);
}
}
ParsingMRIScript = false;
// Nothing to do if not saved.
if (Saved)
performOperation(ReplaceOrInsert, &NewMembers);
exit(0);
}
static bool handleGenericOption(StringRef arg) {
if (arg == "-help" || arg == "--help" || arg == "-h") {
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);
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 = nullptr;
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) {
StringRef arg(argv[i]);
if (handleGenericOption(arg)) {
return 0;
} else if (arg.consume_front("-")) {
// Handle the -D/-U flag
while (!arg.empty()) {
if (arg.front() == 'D') {
Deterministic = true;
} else if (arg.front() == 'U') {
Deterministic = false;
} else if (arg.front() == 'h') {
printHelpMessage();
return 0;
} else if (arg.front() == 'v') {
cl::PrintVersionMessage();
return 0;
} else {
// TODO: GNU ranlib also supports a -t flag
fail("Invalid option: '-" + arg + "'");
}
arg = arg.drop_front(1);
}
} else {
if (ArchiveSpecified)
fail("exactly one archive should be specified");
ArchiveSpecified = true;
ArchiveName = arg.str();
}
}
if (!ArchiveSpecified) {
badUsage("an archive name must be specified");
}
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);
auto Is = [](StringRef Tool) {
// We need to recognize the following filenames.
//
// Lib.exe -> lib (see D44808, MSBuild runs Lib.exe)
// dlltool.exe -> dlltool
// arm-pokymllib32-linux-gnueabi-llvm-ar-10 -> ar
auto I = Stem.rfind_lower(Tool);
return I != StringRef::npos &&
(I + Tool.size() == Stem.size() || !isAlnum(Stem[I + Tool.size()]));
};
if (Is("dlltool"))
return dlltoolDriverMain(makeArrayRef(argv, argc));
if (Is("ranlib"))
return ranlib_main(argc, argv);
if (Is("lib"))
return libDriverMain(makeArrayRef(argv, argc));
if (Is("ar"))
return ar_main(argc, argv);
fail("not ranlib, ar, lib or dlltool");
}
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