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-rw-r--r--lib/ToolDrivers/llvm-lib/LibDriver.cpp156
1 files changed, 151 insertions, 5 deletions
diff --git a/lib/ToolDrivers/llvm-lib/LibDriver.cpp b/lib/ToolDrivers/llvm-lib/LibDriver.cpp
index 64f4fe423f25..18ab6637305e 100644
--- a/lib/ToolDrivers/llvm-lib/LibDriver.cpp
+++ b/lib/ToolDrivers/llvm-lib/LibDriver.cpp
@@ -1,9 +1,8 @@
//===- LibDriver.cpp - lib.exe-compatible driver --------------------------===//
//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
//
//===----------------------------------------------------------------------===//
//
@@ -14,8 +13,12 @@
#include "llvm/ToolDrivers/llvm-lib/LibDriver.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/BinaryFormat/COFF.h"
#include "llvm/BinaryFormat/Magic.h"
+#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/Object/ArchiveWriter.h"
+#include "llvm/Object/COFF.h"
+#include "llvm/Object/WindowsMachineFlag.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
@@ -97,6 +100,47 @@ static std::string findInputFile(StringRef File, ArrayRef<StringRef> Paths) {
return "";
}
+static void fatalOpenError(llvm::Error E, Twine File) {
+ if (!E)
+ return;
+ handleAllErrors(std::move(E), [&](const llvm::ErrorInfoBase &EIB) {
+ llvm::errs() << "error opening '" << File << "': " << EIB.message() << '\n';
+ exit(1);
+ });
+}
+
+static void doList(opt::InputArgList& Args) {
+ // lib.exe prints the contents of the first archive file.
+ std::unique_ptr<MemoryBuffer> B;
+ for (auto *Arg : Args.filtered(OPT_INPUT)) {
+ // Create or open the archive object.
+ ErrorOr<std::unique_ptr<MemoryBuffer>> MaybeBuf =
+ MemoryBuffer::getFile(Arg->getValue(), -1, false);
+ fatalOpenError(errorCodeToError(MaybeBuf.getError()), Arg->getValue());
+
+ if (identify_magic(MaybeBuf.get()->getBuffer()) == file_magic::archive) {
+ B = std::move(MaybeBuf.get());
+ break;
+ }
+ }
+
+ // lib.exe doesn't print an error if no .lib files are passed.
+ if (!B)
+ return;
+
+ Error Err = Error::success();
+ object::Archive Archive(B.get()->getMemBufferRef(), Err);
+ fatalOpenError(std::move(Err), B->getBufferIdentifier());
+
+ for (auto &C : Archive.children(Err)) {
+ Expected<StringRef> NameOrErr = C.getName();
+ fatalOpenError(NameOrErr.takeError(), B->getBufferIdentifier());
+ StringRef Name = NameOrErr.get();
+ llvm::outs() << Name << '\n';
+ }
+ fatalOpenError(std::move(Err), B->getBufferIdentifier());
+}
+
int llvm::libDriverMain(ArrayRef<const char *> ArgsArr) {
BumpPtrAllocator Alloc;
StringSaver Saver(Alloc);
@@ -119,7 +163,8 @@ int llvm::libDriverMain(ArrayRef<const char *> ArgsArr) {
return 1;
}
for (auto *Arg : Args.filtered(OPT_UNKNOWN))
- llvm::errs() << "ignoring unknown argument: " << Arg->getSpelling() << "\n";
+ llvm::errs() << "ignoring unknown argument: " << Arg->getAsString(Args)
+ << "\n";
// Handle /help
if (Args.hasArg(OPT_help)) {
@@ -131,8 +176,25 @@ int llvm::libDriverMain(ArrayRef<const char *> ArgsArr) {
if (!Args.hasArgNoClaim(OPT_INPUT))
return 0;
+ if (Args.hasArg(OPT_lst)) {
+ doList(Args);
+ return 0;
+ }
+
std::vector<StringRef> SearchPaths = getSearchPaths(&Args, Saver);
+ COFF::MachineTypes LibMachine = COFF::IMAGE_FILE_MACHINE_UNKNOWN;
+ std::string LibMachineSource;
+ if (auto *Arg = Args.getLastArg(OPT_machine)) {
+ LibMachine = getMachineType(Arg->getValue());
+ if (LibMachine == COFF::IMAGE_FILE_MACHINE_UNKNOWN) {
+ llvm::errs() << "unknown /machine: arg " << Arg->getValue() << '\n';
+ return 1;
+ }
+ LibMachineSource =
+ std::string(" (from '/machine:") + Arg->getValue() + "' flag)";
+ }
+
// Create a NewArchiveMember for each input file.
std::vector<NewArchiveMember> Members;
for (auto *Arg : Args.filtered(OPT_INPUT)) {
@@ -158,11 +220,95 @@ int llvm::libDriverMain(ArrayRef<const char *> ArgsArr) {
<< ": not a COFF object, bitcode or resource file\n";
return 1;
}
+
+ // Check that all input files have the same machine type.
+ // Mixing normal objects and LTO bitcode files is fine as long as they
+ // have the same machine type.
+ // Doing this here duplicates the header parsing work that writeArchive()
+ // below does, but it's not a lot of work and it's a bit awkward to do
+ // in writeArchive() which needs to support many tools, can't assume the
+ // input is COFF, and doesn't have a good way to report errors.
+ COFF::MachineTypes FileMachine = COFF::IMAGE_FILE_MACHINE_UNKNOWN;
+ if (Magic == file_magic::coff_object) {
+ std::error_code EC;
+ object::COFFObjectFile Obj(*MOrErr->Buf, EC);
+ if (EC) {
+ llvm::errs() << Arg->getValue() << ": failed to open: " << EC.message()
+ << '\n';
+ return 1;
+ }
+ uint16_t Machine = Obj.getMachine();
+ if (Machine != COFF::IMAGE_FILE_MACHINE_I386 &&
+ Machine != COFF::IMAGE_FILE_MACHINE_AMD64 &&
+ Machine != COFF::IMAGE_FILE_MACHINE_ARMNT &&
+ Machine != COFF::IMAGE_FILE_MACHINE_ARM64) {
+ llvm::errs() << Arg->getValue() << ": unknown machine: " << Machine
+ << '\n';
+ return 1;
+ }
+ FileMachine = static_cast<COFF::MachineTypes>(Machine);
+ } else if (Magic == file_magic::bitcode) {
+ Expected<std::string> TripleStr = getBitcodeTargetTriple(*MOrErr->Buf);
+ if (!TripleStr) {
+ llvm::errs() << Arg->getValue()
+ << ": failed to get target triple from bitcode\n";
+ return 1;
+ }
+ switch (Triple(*TripleStr).getArch()) {
+ case Triple::x86:
+ FileMachine = COFF::IMAGE_FILE_MACHINE_I386;
+ break;
+ case Triple::x86_64:
+ FileMachine = COFF::IMAGE_FILE_MACHINE_AMD64;
+ break;
+ case Triple::arm:
+ FileMachine = COFF::IMAGE_FILE_MACHINE_ARMNT;
+ break;
+ case Triple::aarch64:
+ FileMachine = COFF::IMAGE_FILE_MACHINE_ARM64;
+ break;
+ default:
+ llvm::errs() << Arg->getValue() << ": unknown arch in target triple "
+ << *TripleStr << '\n';
+ return 1;
+ }
+ }
+
+ // FIXME: Once lld-link rejects multiple resource .obj files:
+ // Call convertResToCOFF() on .res files and add the resulting
+ // COFF file to the .lib output instead of adding the .res file, and remove
+ // this check. See PR42180.
+ if (FileMachine != COFF::IMAGE_FILE_MACHINE_UNKNOWN) {
+ if (LibMachine == COFF::IMAGE_FILE_MACHINE_UNKNOWN) {
+ LibMachine = FileMachine;
+ LibMachineSource = std::string(" (inferred from earlier file '") +
+ Arg->getValue() + "')";
+ } else if (LibMachine != FileMachine) {
+ llvm::errs() << Arg->getValue() << ": file machine type "
+ << machineToStr(FileMachine)
+ << " conflicts with library machine type "
+ << machineToStr(LibMachine) << LibMachineSource << '\n';
+ return 1;
+ }
+ }
+
Members.emplace_back(std::move(*MOrErr));
}
// Create an archive file.
std::string OutputPath = getOutputPath(&Args, Members[0]);
+ // llvm-lib uses relative paths for both regular and thin archives, unlike
+ // standard GNU ar, which only uses relative paths for thin archives and
+ // basenames for regular archives.
+ for (NewArchiveMember &Member : Members) {
+ if (sys::path::is_relative(Member.MemberName)) {
+ Expected<std::string> PathOrErr =
+ computeArchiveRelativePath(OutputPath, Member.MemberName);
+ if (PathOrErr)
+ Member.MemberName = Saver.save(*PathOrErr);
+ }
+ }
+
if (Error E =
writeArchive(OutputPath, Members,
/*WriteSymtab=*/true, object::Archive::K_GNU,
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-07 20:01:27 +0000