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//===- lib/Core/LinkingContext.cpp - Linker Context Object Interface ------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lld/Core/LinkingContext.h"
#include "lld/Core/Resolver.h"
#include "lld/ReaderWriter/Writer.h"
#include "lld/ReaderWriter/Simple.h"
#include "llvm/ADT/Triple.h"
namespace lld {
LinkingContext::LinkingContext()
: _deadStrip(false), _globalsAreDeadStripRoots(false),
_searchArchivesToOverrideTentativeDefinitions(false),
_searchSharedLibrariesToOverrideTentativeDefinitions(false),
_warnIfCoalesableAtomsHaveDifferentCanBeNull(false),
_warnIfCoalesableAtomsHaveDifferentLoadName(false),
_printRemainingUndefines(true), _allowRemainingUndefines(false),
_logInputFiles(false), _allowShlibUndefines(false),
_outputFileType(OutputFileType::Default), _currentInputElement(nullptr) {}
LinkingContext::~LinkingContext() {}
bool LinkingContext::validate(raw_ostream &diagnostics) {
_yamlReader = createReaderYAML(*this);
_nativeReader = createReaderNative(*this);
return validateImpl(diagnostics);
}
error_code LinkingContext::writeFile(const File &linkedFile) const {
return this->writer().writeFile(linkedFile, _outputPath);
}
bool LinkingContext::createImplicitFiles(
std::vector<std::unique_ptr<File> > &result) const {
return this->writer().createImplicitFiles(result);
}
std::unique_ptr<File> LinkingContext::createEntrySymbolFile() const {
if (entrySymbolName().empty())
return nullptr;
std::unique_ptr<SimpleFile> entryFile(
new SimpleFile(*this, "command line option -entry"));
entryFile->addAtom(
*(new (_allocator) SimpleUndefinedAtom(*entryFile, entrySymbolName())));
return std::move(entryFile);
}
std::unique_ptr<File> LinkingContext::createUndefinedSymbolFile() const {
if (_initialUndefinedSymbols.empty())
return nullptr;
std::unique_ptr<SimpleFile> undefinedSymFile(
new SimpleFile(*this, "command line option -u"));
for (auto undefSymStr : _initialUndefinedSymbols)
undefinedSymFile->addAtom(*(new (_allocator) SimpleUndefinedAtom(
*undefinedSymFile, undefSymStr)));
return std::move(undefinedSymFile);
}
bool LinkingContext::createInternalFiles(
std::vector<std::unique_ptr<File> > &result) const {
std::unique_ptr<File> internalFile;
internalFile = createEntrySymbolFile();
if (internalFile)
result.push_back(std::move(internalFile));
internalFile = createUndefinedSymbolFile();
if (internalFile)
result.push_back(std::move(internalFile));
return true;
}
void LinkingContext::setResolverState(uint32_t state) {
_currentInputElement->setResolverState(state);
}
ErrorOr<File &> LinkingContext::nextFile() {
// When nextFile() is called for the first time, _currentInputElement is not
// initialized. Initialize it with the first element of the input graph.
if (_currentInputElement == nullptr) {
ErrorOr<InputElement *> elem = inputGraph().getNextInputElement();
if (error_code(elem) == InputGraphError::no_more_elements)
return make_error_code(InputGraphError::no_more_files);
_currentInputElement = *elem;
}
// Otherwise, try to get the next file of _currentInputElement. If the current
// input element points to an archive file, and there's a file left in the
// archive, it will succeed. If not, try to get the next file in the input
// graph.
for (;;) {
ErrorOr<File &> nextFile = _currentInputElement->getNextFile();
if (error_code(nextFile) != InputGraphError::no_more_files)
return std::move(nextFile);
ErrorOr<InputElement *> elem = inputGraph().getNextInputElement();
if (error_code(elem) == InputGraphError::no_more_elements ||
*elem == nullptr)
return make_error_code(InputGraphError::no_more_files);
_currentInputElement = *elem;
}
}
void LinkingContext::addPasses(PassManager &pm) const {}
} // end namespace lld
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