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llvm-ar.cpp
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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/BinaryFormat/Magic.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/ArchiveWriter.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/InitLLVM.h"
#include "llvm/Support/LLVMDriver.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/TargetParser/Host.h"
#include "llvm/TargetParser/Triple.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;
using namespace llvm::object;
// The name this program was invoked as.
static StringRef ToolName;
// The basename of this program.
static StringRef Stem;
static void printRanLibHelp(StringRef ToolName) {
outs() << "OVERVIEW: LLVM ranlib\n\n"
<< "Generate an index for archives\n\n"
<< "USAGE: " + ToolName + " archive...\n\n"
<< "OPTIONS:\n"
<< " -h --help - Display available options\n"
<< " -v --version - Display the version of this program\n"
<< " -D - Use zero for timestamps and uids/gids "
"(default)\n"
<< " -U - Use actual timestamps and uids/gids\n"
<< " -X{32|64|32_64|any} - Specify which archive symbol tables "
"should be generated if they do not already exist (AIX OS only)\n";
}
static void printArHelp(StringRef ToolName) {
const char ArOptions[] =
R"(OPTIONS:
--format - archive format to create
=default - default
=gnu - gnu
=darwin - darwin
=bsd - bsd
=bigarchive - big archive (AIX OS)
--plugin=<string> - ignored for compatibility
-h --help - display this help and exit
--output - the directory to extract archive members to
--rsp-quoting - quoting style for response files
=posix - posix
=windows - windows
--thin - create a thin archive
--version - print the version and exit
-X{32|64|32_64|any} - object mode (only for AIX OS)
@<file> - read options from <file>
OPERATIONS:
d - delete [files] from the archive
m - move [files] in the archive
p - print contents of [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 list of files in 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] - deprecated, use --thin instead
[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
)";
outs() << "OVERVIEW: LLVM Archiver\n\n"
<< "USAGE: " + ToolName +
" [options] [-]<operation>[modifiers] [relpos] "
"[count] <archive> [files]\n"
<< " " + ToolName + " -M [<mri-script]\n\n";
outs() << ArOptions;
}
static void printHelpMessage() {
if (Stem.contains_insensitive("ranlib"))
printRanLibHelp(Stem);
else if (Stem.contains_insensitive("ar"))
printArHelp(Stem);
}
static unsigned MRILineNumber;
static bool ParsingMRIScript;
// Show the error plus the usage message, and exit.
[[noreturn]] static void badUsage(Twine Error) {
WithColor::error(errs(), ToolName) << Error << "\n";
printHelpMessage();
exit(1);
}
// Show the error message and exit.
[[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 void warn(Twine Message) {
WithColor::warning(errs(), ToolName) << Message << "\n";
}
static SmallVector<const char *, 256> PositionalArgs;
static bool MRI;
namespace {
enum Format { Default, GNU, BSD, DARWIN, BIGARCHIVE, 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
};
enum class BitModeTy { Bit32, Bit64, Bit32_64, Any, Unknown };
static BitModeTy BitMode = BitModeTy::Bit32;
// 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 SymtabWritingMode Symtab =
SymtabWritingMode::NormalSymtab; ///< '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;
// Output directory specified by --output.
static std::string OutputDir;
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 = SymtabWritingMode::NormalSymtab;
MaybeJustCreateSymTab = true;
break;
case 'S':
Symtab = SymtabWritingMode::NoSymtab;
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;
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]);
}
}
// Thin archives store path names, so P should be forced.
if (Thin)
CompareFullPath = true;
// 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");
if (!OutputDir.empty()) {
if (Operation != Extract)
badUsage("--output is only applicable to the 'x' operation");
bool IsDir = false;
// If OutputDir is not a directory, create_directories may still succeed if
// all components of the path prefix are directories. Test is_directory as
// well.
if (!sys::fs::create_directories(OutputDir))
sys::fs::is_directory(OutputDir, IsDir);
if (!IsDir)
fail("'" + OutputDir + "' is not a directory");
}
// 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();
StringRef outputFilePath;
SmallString<128> path;
if (OutputDir.empty()) {
outputFilePath = sys::path::filename(Name);
} else {
sys::path::append(path, OutputDir, sys::path::filename(Name));
outputFilePath = path.str();
}
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 bool isValidInBitMode(Binary &Bin) {
if (BitMode == BitModeTy::Bit32_64 || BitMode == BitModeTy::Any)
return true;
if (SymbolicFile *SymFile = dyn_cast<SymbolicFile>(&Bin)) {
bool Is64Bit = SymFile->is64Bit();
if ((Is64Bit && (BitMode == BitModeTy::Bit32)) ||
(!Is64Bit && (BitMode == BitModeTy::Bit64)))
return false;
}
// In AIX "ar", non-object files are always considered to have a valid bit
// mode.
return true;
}
Expected<std::unique_ptr<Binary>> getAsBinary(const NewArchiveMember &NM,
LLVMContext *Context) {
auto BinaryOrErr = createBinary(NM.Buf->getMemBufferRef(), Context);
if (BinaryOrErr)
return std::move(*BinaryOrErr);
return BinaryOrErr.takeError();
}
Expected<std::unique_ptr<Binary>> getAsBinary(const Archive::Child &C,
LLVMContext *Context) {
return C.getAsBinary(Context);
}
template <class A> static bool isValidInBitMode(const A &Member) {
if (object::Archive::getDefaultKindForHost() != object::Archive::K_AIXBIG)
return true;
LLVMContext Context;
Expected<std::unique_ptr<Binary>> BinOrErr = getAsBinary(Member, &Context);
// In AIX "ar", if there is a non-object file member, it is never ignored due
// to the bit mode setting.
if (!BinOrErr) {
consumeError(BinOrErr.takeError());
return true;
}
return isValidInBitMode(*BinOrErr.get());
}
static void warnInvalidObjectForFileMode(Twine Name) {
warn("'" + Name + "' is not valid with the current object file mode");
}
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();
// Check whether to ignore this object due to its bitness.
if (!isValidInBitMode(C))
continue;
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) {
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 NewArchiveMember getArchiveMember(StringRef FileName) {
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));
}
}
return std::move(*NMOrErr);
}
static void addMember(std::vector<NewArchiveMember> &Members,
NewArchiveMember &NM) {
Members.push_back(std::move(NM));
}
static void addMember(std::vector<NewArchiveMember> &Members,
StringRef FileName, bool FlattenArchive = false) {
NewArchiveMember NM = getArchiveMember(FileName);
if (!isValidInBitMode(NM)) {
warnInvalidObjectForFileMode(FileName);
return;
}
if (FlattenArchive &&
identify_magic(NM.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(NM));
}
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 (!isValidInBitMode(Member))
return IA_AddOldMember;
if (Operation == QuickAppend || Members.empty())
return IA_AddOldMember;
auto MI = find_if(Members, [Name](StringRef Path) {
if (Thin && !sys::path::is_absolute(Path)) {
Expected<std::string> PathOrErr =
computeArchiveRelativePath(ArchiveName, Path);
return comparePaths(Name, PathOrErr ? *PathOrErr : Path);
} else {
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) && isValidInBitMode(Child)) {
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);
auto HandleNewMember = [](auto Member, auto &Members, auto &Child) {
NewArchiveMember NM = getArchiveMember(*Member);
if (isValidInBitMode(NM))
addMember(Members, NM);
else {
// If a new member is not a valid object for the bit mode, add
// the old member back.
warnInvalidObjectForFileMode(*Member);
addChildMember(Members, Child, /*FlattenArchive=*/Thin);
}
};
switch (Action) {
case IA_AddOldMember:
addChildMember(Ret, Child, /*FlattenArchive=*/Thin);
break;
case IA_AddNewMember:
HandleNewMember(MemberI, Ret, Child);
break;
case IA_Delete:
break;
case IA_MoveOldMember:
addChildMember(Moved, Child, /*FlattenArchive=*/Thin);
break;
case IA_MoveNewMember:
HandleNewMember(MemberI, Moved, Child);
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(),