142 lines
4.3 KiB
C++
142 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/Driver/Driver.h"
|
|
|
|
#include "lld/Core/LLVM.h"
|
|
#include "lld/Core/Instrumentation.h"
|
|
#include "lld/Core/PassManager.h"
|
|
#include "lld/Core/Parallel.h"
|
|
#include "lld/Core/Resolver.h"
|
|
#include "lld/ReaderWriter/Reader.h"
|
|
#include "lld/ReaderWriter/Writer.h"
|
|
#include "lld/Passes/RoundTripNativePass.h"
|
|
#include "lld/Passes/RoundTripYAMLPass.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 {
|
|
|
|
/// 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);
|
|
}
|
|
InputGraph &inputGraph = context.getInputGraph();
|
|
if (!inputGraph.size())
|
|
return false;
|
|
inputGraph.normalize();
|
|
|
|
bool fail = false;
|
|
|
|
// Read inputs
|
|
ScopedTask readTask(getDefaultDomain(), "Read Args");
|
|
TaskGroup tg;
|
|
std::mutex diagnosticsMutex;
|
|
for (std::unique_ptr<InputElement> &ie : inputGraph.inputElements()) {
|
|
tg.spawn([&] {
|
|
// Writes to the same output stream is not guaranteed to be thread-safe.
|
|
// We buffer the diagnostics output to a separate string-backed output
|
|
// stream, acquire the lock, and then print it out.
|
|
std::string buf;
|
|
llvm::raw_string_ostream stream(buf);
|
|
|
|
if (std::error_code ec = ie->parse(context, stream)) {
|
|
if (FileNode *fileNode = dyn_cast<FileNode>(ie.get()))
|
|
stream << fileNode->errStr(ec) << "\n";
|
|
else if (dyn_cast<Group>(ie.get()))
|
|
// FIXME: We need a better diagnostics here
|
|
stream << "Cannot parse group input element\n";
|
|
else
|
|
llvm_unreachable("Unknown type of input element");
|
|
fail = true;
|
|
}
|
|
|
|
stream.flush();
|
|
if (!buf.empty()) {
|
|
std::lock_guard<std::mutex> lock(diagnosticsMutex);
|
|
diagnostics << buf;
|
|
}
|
|
});
|
|
}
|
|
tg.sync();
|
|
readTask.end();
|
|
|
|
if (fail)
|
|
return false;
|
|
|
|
std::unique_ptr<SimpleFileNode> fileNode(
|
|
new SimpleFileNode("Internal Files"));
|
|
|
|
InputGraph::FileVectorT internalFiles;
|
|
context.createInternalFiles(internalFiles);
|
|
|
|
if (internalFiles.size())
|
|
fileNode->addFiles(std::move(internalFiles));
|
|
|
|
// Give target a chance to add files.
|
|
InputGraph::FileVectorT implicitFiles;
|
|
context.createImplicitFiles(implicitFiles);
|
|
if (implicitFiles.size())
|
|
fileNode->addFiles(std::move(implicitFiles));
|
|
context.getInputGraph().addInputElementFront(std::move(fileNode));
|
|
|
|
// 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);
|
|
|
|
#ifndef NDEBUG
|
|
llvm::Optional<std::string> env = llvm::sys::Process::GetEnv("LLD_RUN_ROUNDTRIP_TEST");
|
|
if (env.hasValue() && !env.getValue().empty()) {
|
|
pm.add(std::unique_ptr<Pass>(new RoundTripYAMLPass(context)));
|
|
pm.add(std::unique_ptr<Pass>(new RoundTripNativePass(context)));
|
|
}
|
|
#endif
|
|
|
|
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
|