1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
12 // file at the top-level directory of this distribution and at
13 // http://rust-lang.org/COPYRIGHT.
15 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
16 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
17 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
18 // option. This file may not be copied, modified, or distributed
19 // except according to those terms.
21 // the rustc crate store interface. This also includes types that
22 // are *mostly* used as a part of that interface, but these should
23 // probably get a better home if someone can find one.
26 use dep_graph::DepNode;
27 use hir::def_id::{CrateNum, DefId, DefIndex};
28 use hir::map as hir_map;
29 use hir::map::definitions::{Definitions, DefKey, DisambiguatedDefPathData};
32 use middle::lang_items;
33 use ty::{self, TyCtxt};
35 use session::search_paths::PathKind;
36 use util::nodemap::{NodeSet, DefIdMap};
39 use std::path::{Path, PathBuf};
41 use owning_ref::ErasedBoxRef;
43 use syntax::ext::base::SyntaxExtension;
44 use syntax::symbol::Symbol;
46 use rustc_back::target::Target;
48 use rustc_back::PanicStrategy;
50 pub use self::NativeLibraryKind::*;
52 // lonely orphan structs and enums looking for a better home
54 #[derive(Clone, Debug)]
59 // Where a crate came from on the local filesystem. One of these three options
61 #[derive(PartialEq, Clone, Debug)]
62 pub struct CrateSource {
63 pub dylib: Option<(PathBuf, PathKind)>,
64 pub rlib: Option<(PathBuf, PathKind)>,
65 pub rmeta: Option<(PathBuf, PathKind)>,
68 #[derive(RustcEncodable, RustcDecodable, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Debug)]
70 /// A dependency that is only used for its macros, none of which are visible from other crates.
71 /// These are included in the metadata only as placeholders and are ignored when decoding.
73 /// A dependency that is only used for its macros.
75 /// A dependency that is always injected into the dependency list and so
76 /// doesn't need to be linked to an rlib, e.g. the injected allocator.
78 /// A dependency that is required by an rlib version of this crate.
79 /// Ordinary `extern crate`s result in `Explicit` dependencies.
84 pub fn macros_only(self) -> bool {
86 DepKind::UnexportedMacrosOnly | DepKind::MacrosOnly => true,
87 DepKind::Implicit | DepKind::Explicit => false,
92 #[derive(PartialEq, Clone, Debug)]
100 pub fn is_some(&self) -> bool {
101 if let LibSource::Some(_) = *self {
108 pub fn option(&self) -> Option<PathBuf> {
110 LibSource::Some(ref p) => Some(p.clone()),
111 LibSource::MetadataOnly | LibSource::None => None,
116 #[derive(Copy, Debug, PartialEq, Clone, RustcEncodable, RustcDecodable)]
117 pub enum LinkagePreference {
122 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, RustcEncodable, RustcDecodable)]
123 pub enum NativeLibraryKind {
124 NativeStatic, // native static library (.a archive)
125 NativeStaticNobundle, // native static library, which doesn't get bundled into .rlibs
126 NativeFramework, // macOS-specific
127 NativeUnknown, // default way to specify a dynamic library
130 #[derive(Clone, Hash, RustcEncodable, RustcDecodable)]
131 pub struct NativeLibrary {
132 pub kind: NativeLibraryKind,
134 pub cfg: Option<ast::MetaItem>,
135 pub foreign_items: Vec<DefIndex>,
138 pub enum LoadedMacro {
140 ProcMacro(Rc<SyntaxExtension>),
143 #[derive(Copy, Clone, Debug)]
144 pub struct ExternCrate {
145 /// def_id of an `extern crate` in the current crate that caused
146 /// this crate to be loaded; note that there could be multiple
150 /// span of the extern crate that caused this to be loaded
153 /// If true, then this crate is the crate named by the extern
154 /// crate referenced above. If false, then this crate is a dep
158 /// Number of links to reach the extern crate `def_id`
159 /// declaration; used to select the extern crate with the shortest
164 pub struct EncodedMetadata {
165 pub raw_data: Vec<u8>,
166 pub hashes: EncodedMetadataHashes,
169 impl EncodedMetadata {
170 pub fn new() -> EncodedMetadata {
172 raw_data: Vec::new(),
173 hashes: EncodedMetadataHashes::new(),
178 /// The hash for some metadata that (when saving) will be exported
179 /// from this crate, or which (when importing) was exported by an
181 #[derive(Debug, RustcEncodable, RustcDecodable, Copy, Clone)]
182 pub struct EncodedMetadataHash {
183 pub def_index: DefIndex,
184 pub hash: ich::Fingerprint,
187 /// The hash for some metadata that (when saving) will be exported
188 /// from this crate, or which (when importing) was exported by an
190 #[derive(Debug, RustcEncodable, RustcDecodable, Clone)]
191 pub struct EncodedMetadataHashes {
192 pub entry_hashes: Vec<EncodedMetadataHash>,
193 pub global_hashes: Vec<(DepNode<()>, ich::Fingerprint)>,
196 impl EncodedMetadataHashes {
197 pub fn new() -> EncodedMetadataHashes {
198 EncodedMetadataHashes {
199 entry_hashes: Vec::new(),
200 global_hashes: Vec::new(),
205 /// The backend's way to give the crate store access to the metadata in a library.
206 /// Note that it returns the raw metadata bytes stored in the library file, whether
207 /// it is compressed, uncompressed, some weird mix, etc.
208 /// rmeta files are backend independent and not handled here.
210 /// At the time of this writing, there is only one backend and one way to store
211 /// metadata in library -- this trait just serves to decouple rustc_metadata from
212 /// the archive reader, which depends on LLVM.
213 pub trait MetadataLoader {
214 fn get_rlib_metadata(&self,
217 -> Result<ErasedBoxRef<[u8]>, String>;
218 fn get_dylib_metadata(&self,
221 -> Result<ErasedBoxRef<[u8]>, String>;
224 /// A store of Rust crates, through with their metadata
226 pub trait CrateStore {
227 fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any>;
229 // access to the metadata loader
230 fn metadata_loader(&self) -> &MetadataLoader;
233 fn visibility(&self, def: DefId) -> ty::Visibility;
234 fn visible_parent_map<'a>(&'a self) -> ::std::cell::Ref<'a, DefIdMap<DefId>>;
235 fn item_generics_cloned(&self, def: DefId) -> ty::Generics;
238 fn implementations_of_trait(&self, filter: Option<DefId>) -> Vec<DefId>;
241 fn impl_defaultness(&self, def: DefId) -> hir::Defaultness;
243 // trait/impl-item info
244 fn associated_item_cloned(&self, def: DefId) -> ty::AssociatedItem;
247 fn is_const_fn(&self, did: DefId) -> bool;
248 fn is_default_impl(&self, impl_did: DefId) -> bool;
249 fn is_dllimport_foreign_item(&self, def: DefId) -> bool;
250 fn is_statically_included_foreign_item(&self, def_id: DefId) -> bool;
253 fn dylib_dependency_formats(&self, cnum: CrateNum)
254 -> Vec<(CrateNum, LinkagePreference)>;
255 fn dep_kind(&self, cnum: CrateNum) -> DepKind;
256 fn export_macros(&self, cnum: CrateNum);
257 fn lang_items(&self, cnum: CrateNum) -> Vec<(DefIndex, usize)>;
258 fn missing_lang_items(&self, cnum: CrateNum) -> Vec<lang_items::LangItem>;
259 fn is_allocator(&self, cnum: CrateNum) -> bool;
260 fn is_panic_runtime(&self, cnum: CrateNum) -> bool;
261 fn is_compiler_builtins(&self, cnum: CrateNum) -> bool;
262 fn is_sanitizer_runtime(&self, cnum: CrateNum) -> bool;
263 fn panic_strategy(&self, cnum: CrateNum) -> PanicStrategy;
264 fn extern_crate(&self, cnum: CrateNum) -> Option<ExternCrate>;
265 /// The name of the crate as it is referred to in source code of the current
267 fn crate_name(&self, cnum: CrateNum) -> Symbol;
268 /// The name of the crate as it is stored in the crate's metadata.
269 fn original_crate_name(&self, cnum: CrateNum) -> Symbol;
270 fn crate_hash(&self, cnum: CrateNum) -> Svh;
271 fn crate_disambiguator(&self, cnum: CrateNum) -> Symbol;
272 fn plugin_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>;
273 fn derive_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>;
274 fn native_libraries(&self, cnum: CrateNum) -> Vec<NativeLibrary>;
275 fn exported_symbols(&self, cnum: CrateNum) -> Vec<DefId>;
276 fn is_no_builtins(&self, cnum: CrateNum) -> bool;
279 fn retrace_path(&self,
281 path_data: &[DisambiguatedDefPathData])
283 fn def_key(&self, def: DefId) -> DefKey;
284 fn def_path(&self, def: DefId) -> hir_map::DefPath;
285 fn def_path_hash(&self, def: DefId) -> u64;
286 fn struct_field_names(&self, def: DefId) -> Vec<ast::Name>;
287 fn item_children(&self, did: DefId) -> Vec<def::Export>;
288 fn load_macro(&self, did: DefId, sess: &Session) -> LoadedMacro;
291 fn item_body<'a, 'tcx>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
294 // This is basically a 1-based range of ints, which is a little
295 // silly - I may fix that.
296 fn crates(&self) -> Vec<CrateNum>;
297 fn used_libraries(&self) -> Vec<NativeLibrary>;
298 fn used_link_args(&self) -> Vec<String>;
301 fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, LibSource)>;
302 fn used_crate_source(&self, cnum: CrateNum) -> CrateSource;
303 fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<CrateNum>;
304 fn encode_metadata<'a, 'tcx>(&self,
305 tcx: TyCtxt<'a, 'tcx, 'tcx>,
306 link_meta: &LinkMeta,
309 fn metadata_encoding_version(&self) -> &[u8];
312 // FIXME: find a better place for this?
313 pub fn validate_crate_name(sess: Option<&Session>, s: &str, sp: Option<Span>) {
314 let mut err_count = 0;
316 let mut say = |s: &str| {
318 (_, None) => bug!("{}", s),
319 (Some(sp), Some(sess)) => sess.span_err(sp, s),
320 (None, Some(sess)) => sess.err(s),
325 say("crate name must not be empty");
328 if c.is_alphanumeric() { continue }
329 if c == '_' { continue }
330 say(&format!("invalid character `{}` in crate name: `{}`", c, s));
335 sess.unwrap().abort_if_errors();
339 /// A dummy crate store that does not support any non-local crates,
340 /// for test purposes.
341 pub struct DummyCrateStore;
343 #[allow(unused_variables)]
344 impl CrateStore for DummyCrateStore {
345 fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any>
346 { bug!("crate_data_as_rc_any") }
348 fn visibility(&self, def: DefId) -> ty::Visibility { bug!("visibility") }
349 fn visible_parent_map<'a>(&'a self) -> ::std::cell::Ref<'a, DefIdMap<DefId>> {
350 bug!("visible_parent_map")
352 fn item_generics_cloned(&self, def: DefId) -> ty::Generics
353 { bug!("item_generics_cloned") }
356 fn implementations_of_trait(&self, filter: Option<DefId>) -> Vec<DefId> { vec![] }
359 fn impl_defaultness(&self, def: DefId) -> hir::Defaultness { bug!("impl_defaultness") }
361 // trait/impl-item info
362 fn associated_item_cloned(&self, def: DefId) -> ty::AssociatedItem
363 { bug!("associated_item_cloned") }
366 fn is_const_fn(&self, did: DefId) -> bool { bug!("is_const_fn") }
367 fn is_default_impl(&self, impl_did: DefId) -> bool { bug!("is_default_impl") }
368 fn is_dllimport_foreign_item(&self, id: DefId) -> bool { false }
369 fn is_statically_included_foreign_item(&self, def_id: DefId) -> bool { false }
372 fn dylib_dependency_formats(&self, cnum: CrateNum)
373 -> Vec<(CrateNum, LinkagePreference)>
374 { bug!("dylib_dependency_formats") }
375 fn lang_items(&self, cnum: CrateNum) -> Vec<(DefIndex, usize)>
376 { bug!("lang_items") }
377 fn missing_lang_items(&self, cnum: CrateNum) -> Vec<lang_items::LangItem>
378 { bug!("missing_lang_items") }
379 fn dep_kind(&self, cnum: CrateNum) -> DepKind { bug!("is_explicitly_linked") }
380 fn export_macros(&self, cnum: CrateNum) { bug!("export_macros") }
381 fn is_allocator(&self, cnum: CrateNum) -> bool { bug!("is_allocator") }
382 fn is_panic_runtime(&self, cnum: CrateNum) -> bool { bug!("is_panic_runtime") }
383 fn is_compiler_builtins(&self, cnum: CrateNum) -> bool { bug!("is_compiler_builtins") }
384 fn is_sanitizer_runtime(&self, cnum: CrateNum) -> bool { bug!("is_sanitizer_runtime") }
385 fn panic_strategy(&self, cnum: CrateNum) -> PanicStrategy {
386 bug!("panic_strategy")
388 fn extern_crate(&self, cnum: CrateNum) -> Option<ExternCrate> { bug!("extern_crate") }
389 fn crate_name(&self, cnum: CrateNum) -> Symbol { bug!("crate_name") }
390 fn original_crate_name(&self, cnum: CrateNum) -> Symbol {
391 bug!("original_crate_name")
393 fn crate_hash(&self, cnum: CrateNum) -> Svh { bug!("crate_hash") }
394 fn crate_disambiguator(&self, cnum: CrateNum)
395 -> Symbol { bug!("crate_disambiguator") }
396 fn plugin_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
397 { bug!("plugin_registrar_fn") }
398 fn derive_registrar_fn(&self, cnum: CrateNum) -> Option<DefId>
399 { bug!("derive_registrar_fn") }
400 fn native_libraries(&self, cnum: CrateNum) -> Vec<NativeLibrary>
401 { bug!("native_libraries") }
402 fn exported_symbols(&self, cnum: CrateNum) -> Vec<DefId> { bug!("exported_symbols") }
403 fn is_no_builtins(&self, cnum: CrateNum) -> bool { bug!("is_no_builtins") }
406 fn retrace_path(&self,
408 path_data: &[DisambiguatedDefPathData])
413 fn def_key(&self, def: DefId) -> DefKey { bug!("def_key") }
414 fn def_path(&self, def: DefId) -> hir_map::DefPath {
415 bug!("relative_def_path")
417 fn def_path_hash(&self, def: DefId) -> u64 {
420 fn struct_field_names(&self, def: DefId) -> Vec<ast::Name> { bug!("struct_field_names") }
421 fn item_children(&self, did: DefId) -> Vec<def::Export> { bug!("item_children") }
422 fn load_macro(&self, did: DefId, sess: &Session) -> LoadedMacro { bug!("load_macro") }
425 fn item_body<'a, 'tcx>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
430 // This is basically a 1-based range of ints, which is a little
431 // silly - I may fix that.
432 fn crates(&self) -> Vec<CrateNum> { vec![] }
433 fn used_libraries(&self) -> Vec<NativeLibrary> { vec![] }
434 fn used_link_args(&self) -> Vec<String> { vec![] }
437 fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, LibSource)>
439 fn used_crate_source(&self, cnum: CrateNum) -> CrateSource { bug!("used_crate_source") }
440 fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<CrateNum> { None }
441 fn encode_metadata<'a, 'tcx>(&self,
442 tcx: TyCtxt<'a, 'tcx, 'tcx>,
443 link_meta: &LinkMeta,
446 bug!("encode_metadata")
448 fn metadata_encoding_version(&self) -> &[u8] { bug!("metadata_encoding_version") }
450 // access to the metadata loader
451 fn metadata_loader(&self) -> &MetadataLoader { bug!("metadata_loader") }
454 pub trait CrateLoader {
455 fn process_item(&mut self, item: &ast::Item, defs: &Definitions);
456 fn postprocess(&mut self, krate: &ast::Crate);