forked from OSchip/llvm-project
84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
//===- lib/ReaderWriter/MachO/DarwinInputGraph.cpp ------------------------===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lld/Driver/DarwinInputGraph.h"
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#include "lld/Core/ArchiveLibraryFile.h"
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#include "lld/Core/DefinedAtom.h"
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#include "lld/Core/File.h"
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#include "lld/Core/LLVM.h"
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#include "lld/Core/Reference.h"
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#include "lld/Core/SharedLibraryFile.h"
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namespace lld {
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/// \brief Parse the input file to lld::File.
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std::error_code MachOFileNode::parse(const LinkingContext &ctx,
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raw_ostream &diagnostics) {
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ErrorOr<StringRef> filePath = getPath(ctx);
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if (std::error_code ec = filePath.getError())
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return ec;
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ErrorOr<std::unique_ptr<MemoryBuffer>> mbOrErr =
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MemoryBuffer::getFileOrSTDIN(*filePath);
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if (std::error_code ec = mbOrErr.getError())
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return ec;
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std::unique_ptr<MemoryBuffer> mb = std::move(mbOrErr.get());
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_context.addInputFileDependency(*filePath);
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if (ctx.logInputFiles())
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diagnostics << *filePath << "\n";
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narrowFatBuffer(mb, *filePath);
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std::vector<std::unique_ptr<File>> parsedFiles;
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if (std::error_code ec = ctx.registry().parseFile(std::move(mb), parsedFiles))
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return ec;
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for (std::unique_ptr<File> &pf : parsedFiles) {
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// If file is a dylib, inform LinkingContext about it.
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if (SharedLibraryFile *shl = dyn_cast<SharedLibraryFile>(pf.get())) {
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_context.registerDylib(reinterpret_cast<mach_o::MachODylibFile*>(shl),
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_upwardDylib);
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}
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// If file is an archive and -all_load, then add all members.
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if (ArchiveLibraryFile *archive = dyn_cast<ArchiveLibraryFile>(pf.get())) {
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if (_isWholeArchive) {
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// Have this node own the FileArchive object.
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_archiveFile.reset(archive);
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pf.release();
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// Add all members to _files vector
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return archive->parseAllMembers(_files);
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}
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}
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_files.push_back(std::move(pf));
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}
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return std::error_code();
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}
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/// If buffer contains a fat file, find required arch in fat buffer and
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/// switch buffer to point to just that required slice.
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void MachOFileNode::narrowFatBuffer(std::unique_ptr<MemoryBuffer> &mb,
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StringRef filePath) {
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// Check if buffer is a "fat" file that contains needed arch.
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uint32_t offset;
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uint32_t size;
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if (!_context.sliceFromFatFile(*mb, offset, size)) {
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return;
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}
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// Create new buffer containing just the needed slice.
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auto subuf = MemoryBuffer::getFileSlice(filePath, size, offset);
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if (subuf.getError())
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return;
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// The assignment to mb will release previous buffer.
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mb = std::move(subuf.get());
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}
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} // end namesapce lld
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