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Diffstat (limited to 'source/Utility/FileCollector.cpp')
-rw-r--r-- | source/Utility/FileCollector.cpp | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/source/Utility/FileCollector.cpp b/source/Utility/FileCollector.cpp deleted file mode 100644 index ed9359192205..000000000000 --- a/source/Utility/FileCollector.cpp +++ /dev/null @@ -1,182 +0,0 @@ -//===-- FileCollector.cpp ---------------------------------------*- C++ -*-===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// - -#include "lldb/Utility/FileCollector.h" - -#include "llvm/ADT/SmallString.h" -#include "llvm/Support/FileSystem.h" -#include "llvm/Support/Path.h" -#include "llvm/Support/Process.h" - -using namespace lldb_private; -using namespace llvm; - -static bool IsCaseSensitivePath(StringRef path) { - SmallString<256> tmp_dest = path, upper_dest, real_dest; - - // Remove component traversals, links, etc. - if (!sys::fs::real_path(path, tmp_dest)) - return true; // Current default value in vfs.yaml - path = tmp_dest; - - // Change path to all upper case and ask for its real path, if the latter - // exists and is equal to path, it's not case sensitive. Default to case - // sensitive in the absence of real_path, since this is the YAMLVFSWriter - // default. - upper_dest = path.upper(); - if (sys::fs::real_path(upper_dest, real_dest) && path.equals(real_dest)) - return false; - return true; -} - -FileCollector::FileCollector(const FileSpec &root, const FileSpec &overlay_root) - : m_root(root), m_overlay_root(overlay_root) { - sys::fs::create_directories(m_root.GetPath(), true); -} - -bool FileCollector::GetRealPath(StringRef src_path, - SmallVectorImpl<char> &result) { - SmallString<256> real_path; - StringRef FileName = sys::path::filename(src_path); - std::string directory = sys::path::parent_path(src_path).str(); - auto dir_with_symlink = m_symlink_map.find(directory); - - // Use real_path to fix any symbolic link component present in a path. - // Computing the real path is expensive, cache the search through the - // parent path directory. - if (dir_with_symlink == m_symlink_map.end()) { - auto ec = sys::fs::real_path(directory, real_path); - if (ec) - return false; - m_symlink_map[directory] = real_path.str(); - } else { - real_path = dir_with_symlink->second; - } - - sys::path::append(real_path, FileName); - result.swap(real_path); - return true; -} - -void FileCollector::AddFile(const Twine &file) { - std::lock_guard<std::mutex> lock(m_mutex); - std::string file_str = file.str(); - if (MarkAsSeen(file_str)) - AddFileImpl(file_str); -} - -void FileCollector::AddFileImpl(StringRef src_path) { - std::string root = m_root.GetPath(); - - // We need an absolute src path to append to the root. - SmallString<256> absolute_src = src_path; - sys::fs::make_absolute(absolute_src); - - // Canonicalize src to a native path to avoid mixed separator styles. - sys::path::native(absolute_src); - - // Remove redundant leading "./" pieces and consecutive separators. - absolute_src = sys::path::remove_leading_dotslash(absolute_src); - - // Canonicalize the source path by removing "..", "." components. - SmallString<256> virtual_path = absolute_src; - sys::path::remove_dots(virtual_path, /*remove_dot_dot=*/true); - - // If a ".." component is present after a symlink component, remove_dots may - // lead to the wrong real destination path. Let the source be canonicalized - // like that but make sure we always use the real path for the destination. - SmallString<256> copy_from; - if (!GetRealPath(absolute_src, copy_from)) - copy_from = virtual_path; - - SmallString<256> dst_path = StringRef(root); - sys::path::append(dst_path, sys::path::relative_path(copy_from)); - - // Always map a canonical src path to its real path into the YAML, by doing - // this we map different virtual src paths to the same entry in the VFS - // overlay, which is a way to emulate symlink inside the VFS; this is also - // needed for correctness, not doing that can lead to module redefinition - // errors. - AddFileToMapping(virtual_path, dst_path); -} - -/// Set the access and modification time for the given file from the given -/// status object. -static std::error_code -CopyAccessAndModificationTime(StringRef filename, - const sys::fs::file_status &stat) { - int fd; - - if (auto ec = - sys::fs::openFileForWrite(filename, fd, sys::fs::CD_OpenExisting)) - return ec; - - if (auto ec = sys::fs::setLastAccessAndModificationTime( - fd, stat.getLastAccessedTime(), stat.getLastModificationTime())) - return ec; - - if (auto ec = sys::Process::SafelyCloseFileDescriptor(fd)) - return ec; - - return {}; -} - -std::error_code FileCollector::CopyFiles(bool stop_on_error) { - for (auto &entry : m_vfs_writer.getMappings()) { - // Create directory tree. - if (std::error_code ec = - sys::fs::create_directories(sys::path::parent_path(entry.RPath), - /*IgnoreExisting=*/true)) { - if (stop_on_error) - return ec; - } - - // Copy file over. - if (std::error_code ec = sys::fs::copy_file(entry.VPath, entry.RPath)) { - if (stop_on_error) - return ec; - } - - // Copy over permissions. - if (auto perms = sys::fs::getPermissions(entry.VPath)) { - if (std::error_code ec = sys::fs::setPermissions(entry.RPath, *perms)) { - if (stop_on_error) - return ec; - } - } - - // Copy over modification time. - sys::fs::file_status stat; - if (std::error_code ec = sys::fs::status(entry.VPath, stat)) { - if (stop_on_error) - return ec; - continue; - } - CopyAccessAndModificationTime(entry.RPath, stat); - } - return {}; -} - -std::error_code FileCollector::WriteMapping(const FileSpec &mapping_file) { - std::lock_guard<std::mutex> lock(m_mutex); - - std::string root = m_overlay_root.GetPath(); - - m_vfs_writer.setOverlayDir(root); - m_vfs_writer.setCaseSensitivity(IsCaseSensitivePath(root)); - m_vfs_writer.setUseExternalNames(false); - - std::error_code ec; - raw_fd_ostream os(mapping_file.GetPath(), ec, sys::fs::F_Text); - if (ec) - return ec; - - m_vfs_writer.write(os); - - return {}; -} |