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llvm-mirror/tools/llvm-ar/llvm-ar.cpp
Martin Storsjö 9d14adb9f6 [llvm] Rename StringRef _lower() method calls to _insensitive() 
This is a mechanical change. This actually also renames the
similarly named methods in the SmallString class, however these
methods don't seem to be used outside of the llvm subproject, so
this doesn't break building of the rest of the monorepo.
2021-06-25 00:22:01 +03:00

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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/BinaryFormat/Magic.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/ArchiveWriter.h"
#include "llvm/Object/IRObjectFile.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/SymbolicFile.h"
#include "llvm/Support/Chrono.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/Host.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
#include "llvm/Support/Windows/WindowsSupport.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
--rsp-quoting - quoting style for response files
=posix - posix
=windows - windows
--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
)";
static void printHelpMessage() {
if (Stem.contains_insensitive("ranlib"))
outs() << RanlibHelp;
else if (Stem.contains_insensitive("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, /*IsText=*/false,
/*RequiresNullTerminator=*/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::windows::UTF8ToUTF16(normalizePath(Path1), WPath1));
failIfError(sys::windows::UTF8ToUTF16(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 = std::string(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) {
auto MemBufferRef = Member.Buf->getMemBufferRef();
Expected<std::unique_ptr<object::ObjectFile>> OptionalObject =
object::ObjectFile::createObjectFile(MemBufferRef);
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());
// If we're adding a bitcode file to the archive, detect the Archive kind
// based on the target triple.
LLVMContext Context;
if (identify_magic(MemBufferRef.getBuffer()) == file_magic::bitcode) {
if (auto ObjOrErr = object::SymbolicFile::createSymbolicFile(
MemBufferRef, file_magic::bitcode, &Context)) {
auto &IRObject = cast<object::IRObjectFile>(**ObjOrErr);
return Triple(IRObject.getTargetTriple()).isOSDarwin()
? object::Archive::K_DARWIN
: object::Archive::K_GNU;
} else {
// Squelch the error in case this was not a SymbolicFile.
consumeError(ObjOrErr.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, /*IsText=*/false, /*RequiresNullTerminator=*/false);
std::error_code EC = Buf.getError();
if (EC && EC != errc::no_such_file_or_directory)
fail("unable to open '" + 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("unable to load '") + 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 = std::string(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 const char *matchFlagWithArg(StringRef Expected,
ArrayRef<const char *>::iterator &ArgIt,
ArrayRef<const char *> Args) {
StringRef Arg = *ArgIt;
if (Arg.startswith("--"))
Arg = Arg.substr(2);
else if (Arg.startswith("-"))
Arg = Arg.substr(1);
size_t len = Expected.size();
if (Arg == Expected) {
if (++ArgIt == Args.end())
fail(std::string(Expected) + " requires an argument");
return *ArgIt;
}
if (Arg.startswith(Expected) && Arg.size() > len && Arg[len] == '=')
return Arg.data() + len + 1;
return nullptr;
}
static cl::TokenizerCallback getRspQuoting(ArrayRef<const char *> ArgsArr) {
cl::TokenizerCallback Ret =
Triple(sys::getProcessTriple()).getOS() == Triple::Win32
? cl::TokenizeWindowsCommandLine
: cl::TokenizeGNUCommandLine;
for (ArrayRef<const char *>::iterator ArgIt = ArgsArr.begin();
ArgIt != ArgsArr.end(); ++ArgIt) {
if (const char *Match = matchFlagWithArg("rsp-quoting", ArgIt, ArgsArr)) {
StringRef MatchRef = Match;
if (MatchRef == "posix")
Ret = cl::TokenizeGNUCommandLine;
else if (MatchRef == "windows")
Ret = cl::TokenizeWindowsCommandLine;
else
fail(std::string("Invalid response file quoting style ") + Match);
}
}
return Ret;
}
static int ar_main(int argc, char **argv) {
SmallVector<const char *, 0> Argv(argv + 1, argv + argc);
StringSaver Saver(Alloc);
cl::ExpandResponseFiles(Saver, getRspQuoting(makeArrayRef(argv, argc)), Argv);
for (ArrayRef<const char *>::iterator ArgIt = Argv.begin();
ArgIt != Argv.end(); ++ArgIt) {
const char *Match = nullptr;
if (handleGenericOption(*ArgIt))
return 0;
if (strcmp(*ArgIt, "--") == 0) {
++ArgIt;
for (; ArgIt != Argv.end(); ++ArgIt)
PositionalArgs.push_back(*ArgIt);
break;
}
if (*ArgIt[0] != '-') {
if (Options.empty())
Options += *ArgIt;
else
PositionalArgs.push_back(*ArgIt);
continue;
}
if (strcmp(*ArgIt, "-M") == 0) {
MRI = true;
continue;
}
Match = matchFlagWithArg("format", ArgIt, Argv);
if (Match) {
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);
continue;
}
if (matchFlagWithArg("plugin", ArgIt, Argv) ||
matchFlagWithArg("rsp-quoting", ArgIt, Argv))
continue;
Options += *ArgIt + 1;
}
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_insensitive(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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