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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/Alias.h"
#include "lld/Core/LinkingContext.h"
#include "lld/Core/Resolver.h"
#include "lld/Core/Simple.h"
#include "lld/Core/Writer.h"
#include "llvm/ADT/Triple.h"
namespace lld {
LinkingContext::LinkingContext()
: _deadStrip(false), _allowDuplicates(false),
_globalsAreDeadStripRoots(false),
_searchArchivesToOverrideTentativeDefinitions(false),
_searchSharedLibrariesToOverrideTentativeDefinitions(false),
_warnIfCoalesableAtomsHaveDifferentCanBeNull(false),
_warnIfCoalesableAtomsHaveDifferentLoadName(false),
_printRemainingUndefines(true), _allowRemainingUndefines(false),
_logInputFiles(false), _allowShlibUndefines(false),
_outputFileType(OutputFileType::Default), _nextOrdinal(0) {}
LinkingContext::~LinkingContext() {}
bool LinkingContext::validate(raw_ostream &diagnostics) {
return validateImpl(diagnostics);
}
std::error_code LinkingContext::writeFile(const File &linkedFile) const {
return this->writer().writeFile(linkedFile, _outputPath);
}
bool LinkingContext::createImplicitFiles(
std::vector<std::unique_ptr<File> > &result) {
return this->writer().createImplicitFiles(result);
}
std::unique_ptr<File> LinkingContext::createEntrySymbolFile() const {
return createEntrySymbolFile("<command line option -e>");
}
std::unique_ptr<File>
LinkingContext::createEntrySymbolFile(StringRef filename) const {
if (entrySymbolName().empty())
return nullptr;
std::unique_ptr<SimpleFile> entryFile(new SimpleFile(filename));
entryFile->addAtom(
*(new (_allocator) SimpleUndefinedAtom(*entryFile, entrySymbolName())));
return std::move(entryFile);
}
std::unique_ptr<File> LinkingContext::createUndefinedSymbolFile() const {
return createUndefinedSymbolFile("<command line option -u or --defsym>");
}
std::unique_ptr<File>
LinkingContext::createUndefinedSymbolFile(StringRef filename) const {
if (_initialUndefinedSymbols.empty())
return nullptr;
std::unique_ptr<SimpleFile> undefinedSymFile(new SimpleFile(filename));
for (StringRef undefSym : _initialUndefinedSymbols)
undefinedSymFile->addAtom(*(new (_allocator) SimpleUndefinedAtom(
*undefinedSymFile, undefSym)));
return std::move(undefinedSymFile);
}
std::unique_ptr<File> LinkingContext::createAliasSymbolFile() const {
if (getAliases().empty())
return nullptr;
std::unique_ptr<SimpleFile> file(new SimpleFile("<alias>"));
for (const auto &i : getAliases()) {
StringRef from = i.first;
StringRef to = i.second;
SimpleDefinedAtom *fromAtom = new (_allocator) AliasAtom(*file, from);
UndefinedAtom *toAtom = new (_allocator) SimpleUndefinedAtom(*file, to);
fromAtom->addReference(Reference::KindNamespace::all,
Reference::KindArch::all, Reference::kindLayoutAfter,
0, toAtom, 0);
file->addAtom(*fromAtom);
file->addAtom(*toAtom);
}
return std::move(file);
}
void LinkingContext::createInternalFiles(
std::vector<std::unique_ptr<File> > &result) const {
if (std::unique_ptr<File> file = createEntrySymbolFile())
result.push_back(std::move(file));
if (std::unique_ptr<File> file = createUndefinedSymbolFile())
result.push_back(std::move(file));
if (std::unique_ptr<File> file = createAliasSymbolFile())
result.push_back(std::move(file));
}
void LinkingContext::addPasses(PassManager &pm) {}
} // end namespace lld
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