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//===- lib/ReaderWriter/MachO/DarwinInputGraph.cpp ------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lld/Driver/DarwinInputGraph.h"
#include "lld/Core/ArchiveLibraryFile.h"
#include "lld/Core/DefinedAtom.h"
#include "lld/Core/File.h"
#include "lld/Core/LLVM.h"
#include "lld/Core/Reference.h"
#include "lld/Core/SharedLibraryFile.h"
namespace lld {
/// \brief Parse the input file to lld::File.
std::error_code MachOFileNode::parse(const LinkingContext &ctx,
raw_ostream &diagnostics) {
ErrorOr<StringRef> filePath = getPath(ctx);
if (std::error_code ec = filePath.getError())
return ec;
if (std::error_code ec = getBuffer(*filePath))
return ec;
_context.addInputFileDependency(*filePath);
if (ctx.logInputFiles())
diagnostics << *filePath << "\n";
narrowFatBuffer(*filePath);
std::vector<std::unique_ptr<File>> parsedFiles;
if (std::error_code ec = ctx.registry().parseFile(_buffer, parsedFiles))
return ec;
for (std::unique_ptr<File> &pf : parsedFiles) {
// If file is a dylib, inform LinkingContext about it.
if (SharedLibraryFile *shl = dyn_cast<SharedLibraryFile>(pf.get())) {
_context.registerDylib(reinterpret_cast<mach_o::MachODylibFile*>(shl),
_upwardDylib);
}
// If file is an archive and -all_load, then add all members.
if (ArchiveLibraryFile *archive = dyn_cast<ArchiveLibraryFile>(pf.get())) {
if (_isWholeArchive) {
// Note: the members are added to _files, but the archive is not.
return archive->parseAllMembers(_files);
}
}
_files.push_back(std::move(pf));
}
return std::error_code();
}
/// If buffer contains a fat file, find required arch in fat buffer and
/// switch buffer to point to just that required slice.
void MachOFileNode::narrowFatBuffer(StringRef filePath) {
// Check if buffer is a "fat" file that contains needed arch.
uint32_t offset;
uint32_t size;
if (!_context.sliceFromFatFile(*_buffer, offset, size)) {
return;
}
// Create new buffer containing just the needed slice.
auto subuf = MemoryBuffer::getFileSlice(filePath, size, offset);
if (subuf.getError())
return;
// The assignment to _buffer will release previous buffer.
_buffer = std::move(subuf.get());
}
} // end namesapce lld
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