1 //! Creation of ar archives like for the lib and staticlib crate type
3 use std::collections::BTreeMap;
4 use std::convert::TryFrom;
6 use std::io::{self, Read, Seek};
7 use std::path::{Path, PathBuf};
9 use rustc_codegen_ssa::back::archive::ArchiveBuilder;
10 use rustc_session::Session;
12 use object::read::archive::ArchiveFile;
13 use object::{Object, ObjectSymbol, ReadCache, SymbolKind};
17 FromArchive { archive_index: usize, file_range: (u64, u64) },
21 pub(crate) struct ArArchiveBuilder<'a> {
24 use_gnu_style_archive: bool,
25 no_builtin_ranlib: bool,
27 src_archives: Vec<File>,
28 // Don't use `HashMap` here, as the order is important. `rust.metadata.bin` must always be at
29 // the end of an archive for linkers to not get confused.
30 entries: Vec<(Vec<u8>, ArchiveEntry)>,
33 impl<'a> ArchiveBuilder<'a> for ArArchiveBuilder<'a> {
34 fn new(sess: &'a Session, output: &Path, input: Option<&Path>) -> Self {
35 let (src_archives, entries) = if let Some(input) = input {
36 let read_cache = ReadCache::new(File::open(input).unwrap());
37 let archive = ArchiveFile::parse(&read_cache).unwrap();
38 let mut entries = Vec::new();
40 for entry in archive.members() {
41 let entry = entry.unwrap();
43 entry.name().to_vec(),
44 ArchiveEntry::FromArchive { archive_index: 0, file_range: entry.file_range() },
48 (vec![read_cache.into_inner()], entries)
55 dst: output.to_path_buf(),
56 use_gnu_style_archive: sess.target.archive_format == "gnu",
57 // FIXME fix builtin ranlib on macOS
58 no_builtin_ranlib: sess.target.is_like_osx,
65 fn src_files(&mut self) -> Vec<String> {
66 self.entries.iter().map(|(name, _)| String::from_utf8(name.clone()).unwrap()).collect()
69 fn remove_file(&mut self, name: &str) {
73 .position(|(entry_name, _)| entry_name == name.as_bytes())
74 .expect("Tried to remove file not existing in src archive");
75 self.entries.remove(index);
78 fn add_file(&mut self, file: &Path) {
80 file.file_name().unwrap().to_str().unwrap().to_string().into_bytes(),
81 ArchiveEntry::File(file.to_owned()),
85 fn add_archive<F>(&mut self, archive_path: &Path, mut skip: F) -> std::io::Result<()>
87 F: FnMut(&str) -> bool + 'static,
89 let read_cache = ReadCache::new(std::fs::File::open(&archive_path)?);
90 let archive = ArchiveFile::parse(&read_cache).unwrap();
91 let archive_index = self.src_archives.len();
93 for entry in archive.members() {
94 let entry = entry.map_err(|err| io::Error::new(io::ErrorKind::InvalidData, err))?;
95 let file_name = String::from_utf8(entry.name().to_vec())
96 .map_err(|err| io::Error::new(io::ErrorKind::InvalidData, err))?;
97 if !skip(&file_name) {
99 file_name.into_bytes(),
100 ArchiveEntry::FromArchive { archive_index, file_range: entry.file_range() },
105 self.src_archives.push(read_cache.into_inner());
109 fn update_symbols(&mut self) {}
113 Bsd(ar::Builder<File>),
114 Gnu(ar::GnuBuilder<File>),
117 let sess = self.sess;
119 let mut symbol_table = BTreeMap::new();
121 let mut entries = Vec::new();
123 for (entry_name, entry) in self.entries {
124 // FIXME only read the symbol table of the object files to avoid having to keep all
125 // object files in memory at once, or read them twice.
126 let data = match entry {
127 ArchiveEntry::FromArchive { archive_index, file_range } => {
128 // FIXME read symbols from symtab
129 let src_read_cache = &mut self.src_archives[archive_index];
131 src_read_cache.seek(io::SeekFrom::Start(file_range.0)).unwrap();
132 let mut data = std::vec::from_elem(0, usize::try_from(file_range.1).unwrap());
133 src_read_cache.read_exact(&mut data).unwrap();
137 ArchiveEntry::File(file) => std::fs::read(file).unwrap_or_else(|err| {
139 "error while reading object file during archive building: {}",
145 if !self.no_builtin_ranlib {
146 match object::File::parse(&*data) {
152 .filter_map(|symbol| {
153 if symbol.is_undefined()
155 || symbol.kind() != SymbolKind::Data
156 && symbol.kind() != SymbolKind::Text
157 && symbol.kind() != SymbolKind::Tls
161 symbol.name().map(|name| name.as_bytes().to_vec()).ok()
164 .collect::<Vec<_>>(),
168 let err = err.to_string();
169 if err == "Unknown file magic" {
170 // Not an object file; skip it.
173 "error parsing `{}` during archive creation: {}",
174 String::from_utf8_lossy(&entry_name),
182 entries.push((entry_name, data));
185 let mut builder = if self.use_gnu_style_archive {
188 File::create(&self.dst).unwrap_or_else(|err| {
190 "error opening destination during archive building: {}",
194 entries.iter().map(|(name, _)| name.clone()).collect(),
195 ar::GnuSymbolTableFormat::Size32,
203 File::create(&self.dst).unwrap_or_else(|err| {
205 "error opening destination during archive building: {}",
216 for (entry_name, data) in entries.into_iter() {
217 let header = ar::Header::new(entry_name, data.len() as u64);
219 BuilderKind::Bsd(ref mut builder) => builder.append(&header, &mut &*data).unwrap(),
220 BuilderKind::Gnu(ref mut builder) => builder.append(&header, &mut &*data).unwrap(),
225 std::mem::drop(builder);
227 if self.no_builtin_ranlib {
228 let ranlib = crate::toolchain::get_toolchain_binary(self.sess, "ranlib");
230 // Run ranlib to be able to link the archive
231 let status = std::process::Command::new(ranlib)
234 .expect("Couldn't run ranlib");
236 if !status.success() {
237 self.sess.fatal(&format!("Ranlib exited with code {:?}", status.code()));
242 fn inject_dll_import_lib(
245 _dll_imports: &[rustc_middle::middle::cstore::DllImport],
246 _tmpdir: &rustc_data_structures::temp_dir::MaybeTempDir,
248 bug!("injecting dll imports is not supported");