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//===- lib/Driver/InputGraph.cpp ------------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lld/Core/Resolver.h"
#include "lld/Driver/InputGraph.h"
using namespace lld;
namespace {
bool sortInputElements(const std::unique_ptr<InputElement> &a,
const std::unique_ptr<InputElement> &b) {
return a->getOrdinal() < b->getOrdinal();
}
}
bool InputGraph::addInputElement(std::unique_ptr<InputElement> ie) {
_inputArgs.push_back(std::move(ie));
return true;
}
bool InputGraph::assignOrdinals() {
for (auto &ie : _inputArgs)
ie->setOrdinal(++_ordinal);
return true;
}
bool InputGraph::assignFileOrdinals(uint64_t &startOrdinal) {
for (auto &ie : _inputArgs)
ie->assignFileOrdinals(startOrdinal);
return true;
}
void InputGraph::doPostProcess() {
std::stable_sort(_inputArgs.begin(), _inputArgs.end(), sortInputElements);
}
bool InputGraph::validate() {
for (auto &ie : _inputArgs)
if (!ie->validate())
return false;
return true;
}
bool InputGraph::dump(raw_ostream &diagnostics) {
for (auto &ie : _inputArgs)
if (!ie->dump(diagnostics))
return false;
return true;
}
void InputGraph::insertElementsAt(
std::vector<std::unique_ptr<InputElement> > inputElements,
Position position, size_t pos) {
if (position == InputGraph::Position::BEGIN)
pos = 0;
else if (position == InputGraph::Position::END)
pos = _inputArgs.size();
_inputArgs.insert(_inputArgs.begin() + pos,
std::make_move_iterator(inputElements.begin()),
std::make_move_iterator(inputElements.end()));
}
void InputGraph::insertOneElementAt(std::unique_ptr<InputElement> element,
Position position, size_t pos) {
if (position == InputGraph::Position::BEGIN)
pos = 0;
else if (position == InputGraph::Position::END)
pos = _inputArgs.size();
_inputArgs.insert(_inputArgs.begin() + pos, std::move(element));
}
/// \brief Helper functions for the resolver
ErrorOr<InputElement *> InputGraph::getNextInputElement() {
if (_nextElementIndex >= _inputArgs.size())
return make_error_code(InputGraphError::no_more_elements);
return _inputArgs[_nextElementIndex++].get();
}
/// \brief Set the index on what inputElement has to be returned
ErrorOr<void> InputGraph::setNextElementIndex(uint32_t index) {
if (index > _inputArgs.size())
return make_error_code(llvm::errc::invalid_argument);
_nextElementIndex = index;
return error_code::success();
}
/// InputElement
/// \brief Initialize the Input Element, The ordinal value of an input Element
/// is initially set to -1, if the user wants to override its ordinal,
/// let the user do it
InputElement::InputElement(Kind type, int64_t ordinal)
: _kind(type), _ordinal(ordinal), _weight(0),
_resolveState(Resolver::StateNoChange), _nextFileIndex(0) {}
/// \brief Assign File ordinals for files contained
/// in the InputElement
void FileNode::assignFileOrdinals(uint64_t &startOrdinal) {
for (auto &file : _files)
file->setOrdinalAndIncrement(startOrdinal);
}
/// \brief Read the file into _buffer.
error_code
FileNode::readFile(const LinkingContext &ctx, raw_ostream &diagnostics) {
ErrorOr<StringRef> filePath = getPath(ctx);
if (!filePath &&
error_code(filePath) == llvm::errc::no_such_file_or_directory)
return make_error_code(llvm::errc::no_such_file_or_directory);
// Create a memory buffer
OwningPtr<llvm::MemoryBuffer> opmb;
if (error_code ec = llvm::MemoryBuffer::getFileOrSTDIN(*filePath, opmb))
return ec;
std::unique_ptr<MemoryBuffer> mb(opmb.take());
_buffer = std::move(mb);
if (ctx.logInputFiles())
diagnostics << _buffer->getBufferIdentifier() << "\n";
// YAML file is identified by a .objtxt extension
// FIXME : Identify YAML files by using a magic
if (filePath->endswith(".objtxt"))
if (error_code ec = ctx.getYAMLReader().parseFile(_buffer, _files))
return ec;
return error_code::success();
}
/// \brief Assign File ordinals for files contained
/// in the InputElement
void ControlNode::assignFileOrdinals(uint64_t &startOrdinal) {
for (auto &elem : _elements)
elem->assignFileOrdinals(startOrdinal);
}
/// \brief Assign File ordinals for files contained
/// in the InputElement
void SimpleFileNode::assignFileOrdinals(uint64_t &startOrdinal) {
for (auto &file : _files)
file->setOrdinalAndIncrement(startOrdinal);
}
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