131 lines
4.3 KiB
C++
131 lines
4.3 KiB
C++
//===- lib/Driver/Driver.cpp - Linker Driver Emulator ---------------------===//
|
|
//
|
|
// The LLVM Linker
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "lld/Core/ArchiveLibraryFile.h"
|
|
#include "lld/Core/File.h"
|
|
#include "lld/Core/Instrumentation.h"
|
|
#include "lld/Core/LLVM.h"
|
|
#include "lld/Core/Parallel.h"
|
|
#include "lld/Core/PassManager.h"
|
|
#include "lld/Core/Reader.h"
|
|
#include "lld/Core/Resolver.h"
|
|
#include "lld/Core/Writer.h"
|
|
#include "lld/Driver/Driver.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/ADT/StringSwitch.h"
|
|
#include "llvm/Option/Arg.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/FileSystem.h"
|
|
#include "llvm/Support/Path.h"
|
|
#include "llvm/Support/Process.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <mutex>
|
|
|
|
namespace lld {
|
|
|
|
FileVector makeErrorFile(StringRef path, std::error_code ec) {
|
|
std::vector<std::unique_ptr<File>> result;
|
|
result.push_back(llvm::make_unique<ErrorFile>(path, ec));
|
|
return result;
|
|
}
|
|
|
|
FileVector parseMemberFiles(FileVector &files) {
|
|
std::vector<std::unique_ptr<File>> members;
|
|
for (std::unique_ptr<File> &file : files) {
|
|
if (auto *archive = dyn_cast<ArchiveLibraryFile>(file.get())) {
|
|
if (std::error_code ec = archive->parseAllMembers(members))
|
|
return makeErrorFile(file->path(), ec);
|
|
} else {
|
|
members.push_back(std::move(file));
|
|
}
|
|
}
|
|
return members;
|
|
}
|
|
|
|
FileVector loadFile(LinkingContext &ctx, StringRef path, bool wholeArchive) {
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> mb
|
|
= MemoryBuffer::getFileOrSTDIN(path);
|
|
if (std::error_code ec = mb.getError())
|
|
return makeErrorFile(path, ec);
|
|
std::vector<std::unique_ptr<File>> files;
|
|
if (std::error_code ec = ctx.registry().loadFile(std::move(mb.get()), files))
|
|
return makeErrorFile(path, ec);
|
|
if (wholeArchive)
|
|
return parseMemberFiles(files);
|
|
return files;
|
|
}
|
|
|
|
/// This is where the link is actually performed.
|
|
bool Driver::link(LinkingContext &context, raw_ostream &diagnostics) {
|
|
// Honor -mllvm
|
|
if (!context.llvmOptions().empty()) {
|
|
unsigned numArgs = context.llvmOptions().size();
|
|
const char **args = new const char *[numArgs + 2];
|
|
args[0] = "lld (LLVM option parsing)";
|
|
for (unsigned i = 0; i != numArgs; ++i)
|
|
args[i + 1] = context.llvmOptions()[i];
|
|
args[numArgs + 1] = 0;
|
|
llvm::cl::ParseCommandLineOptions(numArgs + 1, args);
|
|
}
|
|
if (context.getNodes().empty())
|
|
return false;
|
|
|
|
for (std::unique_ptr<Node> &ie : context.getNodes())
|
|
if (FileNode *node = dyn_cast<FileNode>(ie.get()))
|
|
context.getTaskGroup().spawn([node] { node->getFile()->parse(); });
|
|
|
|
std::vector<std::unique_ptr<File>> internalFiles;
|
|
context.createInternalFiles(internalFiles);
|
|
for (auto i = internalFiles.rbegin(), e = internalFiles.rend(); i != e; ++i) {
|
|
auto &members = context.getNodes();
|
|
members.insert(members.begin(), llvm::make_unique<FileNode>(std::move(*i)));
|
|
}
|
|
|
|
// Give target a chance to add files.
|
|
std::vector<std::unique_ptr<File>> implicitFiles;
|
|
context.createImplicitFiles(implicitFiles);
|
|
for (auto i = implicitFiles.rbegin(), e = implicitFiles.rend(); i != e; ++i) {
|
|
auto &members = context.getNodes();
|
|
members.insert(members.begin(), llvm::make_unique<FileNode>(std::move(*i)));
|
|
}
|
|
|
|
// Give target a chance to postprocess input files.
|
|
// Mach-O uses this chance to move all object files before library files.
|
|
// ELF adds specific undefined symbols resolver.
|
|
context.finalizeInputFiles();
|
|
|
|
// Do core linking.
|
|
ScopedTask resolveTask(getDefaultDomain(), "Resolve");
|
|
Resolver resolver(context);
|
|
if (!resolver.resolve())
|
|
return false;
|
|
std::unique_ptr<MutableFile> merged = resolver.resultFile();
|
|
resolveTask.end();
|
|
|
|
// Run passes on linked atoms.
|
|
ScopedTask passTask(getDefaultDomain(), "Passes");
|
|
PassManager pm;
|
|
context.addPasses(pm);
|
|
pm.runOnFile(merged);
|
|
passTask.end();
|
|
|
|
// Give linked atoms to Writer to generate output file.
|
|
ScopedTask writeTask(getDefaultDomain(), "Write");
|
|
if (std::error_code ec = context.writeFile(*merged)) {
|
|
diagnostics << "Failed to write file '" << context.outputPath()
|
|
<< "': " << ec.message() << "\n";
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace
|