]>
Commit | Line | Data |
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223e47cc LB |
1 | // Decoding metadata from a single crate's metadata |
2 | ||
04454e1e | 3 | use crate::creader::{CStore, CrateMetadataRef}; |
dfeec247 | 4 | use crate::rmeta::*; |
9e0c209e | 5 | |
3dfed10e | 6 | use rustc_ast as ast; |
5e7ed085 | 7 | use rustc_ast::ptr::P; |
dfeec247 | 8 | use rustc_data_structures::captures::Captures; |
dfeec247 XL |
9 | use rustc_data_structures::fx::FxHashMap; |
10 | use rustc_data_structures::svh::Svh; | |
5869c6ff XL |
11 | use rustc_data_structures::sync::{Lock, LockGuard, Lrc, OnceCell}; |
12 | use rustc_data_structures::unhash::UnhashMap; | |
ba9703b0 | 13 | use rustc_expand::base::{SyntaxExtension, SyntaxExtensionKind}; |
923072b8 | 14 | use rustc_expand::proc_macro::{AttrProcMacro, BangProcMacro, DeriveProcMacro}; |
dfeec247 | 15 | use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res}; |
3dfed10e | 16 | use rustc_hir::def_id::{CrateNum, DefId, DefIndex, CRATE_DEF_INDEX, LOCAL_CRATE}; |
ba9703b0 | 17 | use rustc_hir::definitions::{DefKey, DefPath, DefPathData, DefPathHash}; |
c295e0f8 | 18 | use rustc_hir::diagnostic_items::DiagnosticItems; |
ba9703b0 | 19 | use rustc_hir::lang_items; |
dfeec247 | 20 | use rustc_index::vec::{Idx, IndexVec}; |
5099ac24 | 21 | use rustc_middle::metadata::ModChild; |
04454e1e | 22 | use rustc_middle::middle::exported_symbols::{ExportedSymbol, SymbolExportInfo}; |
ba9703b0 | 23 | use rustc_middle::mir::interpret::{AllocDecodingSession, AllocDecodingState}; |
c295e0f8 | 24 | use rustc_middle::thir; |
ba9703b0 | 25 | use rustc_middle::ty::codec::TyDecoder; |
a2a8927a | 26 | use rustc_middle::ty::fast_reject::SimplifiedType; |
04454e1e | 27 | use rustc_middle::ty::GeneratorDiagnosticData; |
923072b8 FG |
28 | use rustc_middle::ty::{self, ParameterizedOverTcx, Ty, TyCtxt, Visibility}; |
29 | use rustc_serialize::opaque::MemDecoder; | |
30 | use rustc_serialize::{Decodable, Decoder}; | |
c295e0f8 XL |
31 | use rustc_session::cstore::{ |
32 | CrateSource, ExternCrate, ForeignModule, LinkagePreference, NativeLib, | |
33 | }; | |
ba9703b0 | 34 | use rustc_session::Session; |
136023e0 | 35 | use rustc_span::hygiene::{ExpnIndex, MacroKind}; |
ba9703b0 | 36 | use rustc_span::source_map::{respan, Spanned}; |
f9f354fc | 37 | use rustc_span::symbol::{sym, Ident, Symbol}; |
136023e0 | 38 | use rustc_span::{self, BytePos, ExpnId, Pos, Span, SyntaxContext, DUMMY_SP}; |
9cc50fc6 | 39 | |
ba9703b0 | 40 | use proc_macro::bridge::client::ProcMacro; |
c34b1796 | 41 | use std::io; |
923072b8 | 42 | use std::iter::TrustedLen; |
9e0c209e | 43 | use std::mem; |
e74abb32 | 44 | use std::num::NonZeroUsize; |
ba9703b0 | 45 | use std::path::Path; |
3dfed10e | 46 | use tracing::debug; |
223e47cc | 47 | |
a2a8927a XL |
48 | pub(super) use cstore_impl::provide; |
49 | pub use cstore_impl::provide_extern; | |
3dfed10e | 50 | use rustc_span::hygiene::HygieneDecodeContext; |
60c5eb7d XL |
51 | |
52 | mod cstore_impl; | |
53 | ||
c295e0f8 XL |
54 | /// A reference to the raw binary version of crate metadata. |
55 | /// A `MetadataBlob` internally is just a reference counted pointer to | |
56 | /// the actual data, so cloning it is cheap. | |
57 | #[derive(Clone)] | |
923072b8 | 58 | pub(crate) struct MetadataBlob(Lrc<MetadataRef>); |
c295e0f8 XL |
59 | |
60 | // This is needed so we can create an OwningRef into the blob. | |
61 | // The data behind a `MetadataBlob` has a stable address because it is | |
62 | // contained within an Rc/Arc. | |
63 | unsafe impl rustc_data_structures::owning_ref::StableAddress for MetadataBlob {} | |
64 | ||
65 | // This is needed so we can create an OwningRef into the blob. | |
66 | impl std::ops::Deref for MetadataBlob { | |
67 | type Target = [u8]; | |
68 | ||
69 | #[inline] | |
70 | fn deref(&self) -> &[u8] { | |
71 | &self.0[..] | |
72 | } | |
73 | } | |
60c5eb7d XL |
74 | |
75 | // A map from external crate numbers (as decoded from some crate file) to | |
76 | // local crate numbers (as generated during this session). Each external | |
77 | // crate may refer to types in other external crates, and each has their | |
78 | // own crate numbers. | |
923072b8 | 79 | pub(crate) type CrateNumMap = IndexVec<CrateNum, CrateNum>; |
60c5eb7d | 80 | |
923072b8 | 81 | pub(crate) struct CrateMetadata { |
60c5eb7d XL |
82 | /// The primary crate data - binary metadata blob. |
83 | blob: MetadataBlob, | |
84 | ||
85 | // --- Some data pre-decoded from the metadata blob, usually for performance --- | |
60c5eb7d | 86 | /// NOTE(eddyb) we pass `'static` to a `'tcx` parameter because this |
94222f64 | 87 | /// lifetime is only used behind `Lazy`, and therefore acts like a |
60c5eb7d XL |
88 | /// universal (`for<'tcx>`), that is paired up with whichever `TyCtxt` |
89 | /// is being used to decode those values. | |
923072b8 | 90 | root: CrateRoot, |
60c5eb7d XL |
91 | /// Trait impl data. |
92 | /// FIXME: Used only from queries and can use query cache, | |
93 | /// so pre-decoding can probably be avoided. | |
923072b8 | 94 | trait_impls: FxHashMap<(u32, DefIndex), LazyArray<(DefIndex, Option<SimplifiedType>)>>, |
5e7ed085 FG |
95 | /// Inherent impls which do not follow the normal coherence rules. |
96 | /// | |
97 | /// These can be introduced using either `#![rustc_coherence_is_core]` | |
98 | /// or `#[rustc_allow_incoherent_impl]`. | |
923072b8 | 99 | incoherent_impls: FxHashMap<SimplifiedType, LazyArray<DefIndex>>, |
60c5eb7d XL |
100 | /// Proc macro descriptions for this crate, if it's a proc macro crate. |
101 | raw_proc_macros: Option<&'static [ProcMacro]>, | |
102 | /// Source maps for code from the crate. | |
f9f354fc | 103 | source_map_import_info: OnceCell<Vec<ImportedSourceFile>>, |
c295e0f8 XL |
104 | /// For every definition in this crate, maps its `DefPathHash` to its `DefIndex`. |
105 | def_path_hash_map: DefPathHashMapRef<'static>, | |
136023e0 XL |
106 | /// Likewise for ExpnHash. |
107 | expn_hash_map: OnceCell<UnhashMap<ExpnHash, ExpnIndex>>, | |
60c5eb7d XL |
108 | /// Used for decoding interpret::AllocIds in a cached & thread-safe manner. |
109 | alloc_decoding_state: AllocDecodingState, | |
3dfed10e XL |
110 | /// Caches decoded `DefKey`s. |
111 | def_key_cache: Lock<FxHashMap<DefIndex, DefKey>>, | |
112 | /// Caches decoded `DefPathHash`es. | |
113 | def_path_hash_cache: Lock<FxHashMap<DefIndex, DefPathHash>>, | |
60c5eb7d XL |
114 | |
115 | // --- Other significant crate properties --- | |
60c5eb7d XL |
116 | /// ID of this crate, from the current compilation session's point of view. |
117 | cnum: CrateNum, | |
118 | /// Maps crate IDs as they are were seen from this crate's compilation sessions into | |
119 | /// IDs as they are seen from the current compilation session. | |
120 | cnum_map: CrateNumMap, | |
121 | /// Same ID set as `cnum_map` plus maybe some injected crates like panic runtime. | |
122 | dependencies: Lock<Vec<CrateNum>>, | |
123 | /// How to link (or not link) this crate to the currently compiled crate. | |
3dfed10e | 124 | dep_kind: Lock<CrateDepKind>, |
60c5eb7d | 125 | /// Filesystem location of this crate. |
5099ac24 | 126 | source: Lrc<CrateSource>, |
60c5eb7d XL |
127 | /// Whether or not this crate should be consider a private dependency |
128 | /// for purposes of the 'exported_private_dependencies' lint | |
129 | private_dep: bool, | |
130 | /// The hash for the host proc macro. Used to support `-Z dual-proc-macro`. | |
131 | host_hash: Option<Svh>, | |
132 | ||
3dfed10e XL |
133 | /// Additional data used for decoding `HygieneData` (e.g. `SyntaxContext` |
134 | /// and `ExpnId`). | |
135 | /// Note that we store a `HygieneDecodeContext` for each `CrateMetadat`. This is | |
136 | /// because `SyntaxContext` ids are not globally unique, so we need | |
137 | /// to track which ids we've decoded on a per-crate basis. | |
138 | hygiene_context: HygieneDecodeContext, | |
139 | ||
60c5eb7d | 140 | // --- Data used only for improving diagnostics --- |
60c5eb7d XL |
141 | /// Information about the `extern crate` item or path that caused this crate to be loaded. |
142 | /// If this is `None`, then the crate was injected (e.g., by the allocator). | |
143 | extern_crate: Lock<Option<ExternCrate>>, | |
144 | } | |
145 | ||
dfeec247 | 146 | /// Holds information about a rustc_span::SourceFile imported from another crate. |
60c5eb7d XL |
147 | /// See `imported_source_files()` for more information. |
148 | struct ImportedSourceFile { | |
149 | /// This SourceFile's byte-offset within the source_map of its original crate | |
dfeec247 | 150 | original_start_pos: rustc_span::BytePos, |
60c5eb7d | 151 | /// The end of this SourceFile within the source_map of its original crate |
dfeec247 | 152 | original_end_pos: rustc_span::BytePos, |
60c5eb7d | 153 | /// The imported SourceFile's representation within the local source_map |
dfeec247 | 154 | translated_source_file: Lrc<rustc_span::SourceFile>, |
60c5eb7d XL |
155 | } |
156 | ||
157 | pub(super) struct DecodeContext<'a, 'tcx> { | |
923072b8 | 158 | opaque: MemDecoder<'a>, |
74b04a01 | 159 | cdata: Option<CrateMetadataRef<'a>>, |
c295e0f8 | 160 | blob: &'a MetadataBlob, |
dc9dc135 XL |
161 | sess: Option<&'tcx Session>, |
162 | tcx: Option<TyCtxt<'tcx>>, | |
c34b1796 | 163 | |
b7449926 XL |
164 | // Cache the last used source_file for translating spans as an optimization. |
165 | last_source_file_index: usize, | |
223e47cc | 166 | |
c30ab7b3 | 167 | lazy_state: LazyState, |
0531ce1d | 168 | |
94b46f34 XL |
169 | // Used for decoding interpret::AllocIds in a cached & thread-safe manner. |
170 | alloc_decoding_session: Option<AllocDecodingSession<'a>>, | |
223e47cc LB |
171 | } |
172 | ||
9e0c209e | 173 | /// Abstract over the various ways one can create metadata decoders. |
60c5eb7d | 174 | pub(super) trait Metadata<'a, 'tcx>: Copy { |
c295e0f8 XL |
175 | fn blob(self) -> &'a MetadataBlob; |
176 | ||
74b04a01 | 177 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
dfeec247 XL |
178 | None |
179 | } | |
180 | fn sess(self) -> Option<&'tcx Session> { | |
181 | None | |
182 | } | |
183 | fn tcx(self) -> Option<TyCtxt<'tcx>> { | |
184 | None | |
185 | } | |
b039eaaf | 186 | |
9e0c209e | 187 | fn decoder(self, pos: usize) -> DecodeContext<'a, 'tcx> { |
476ff2be | 188 | let tcx = self.tcx(); |
9e0c209e | 189 | DecodeContext { |
923072b8 | 190 | opaque: MemDecoder::new(self.blob(), pos), |
9e0c209e | 191 | cdata: self.cdata(), |
c295e0f8 | 192 | blob: self.blob(), |
476ff2be | 193 | sess: self.sess().or(tcx.map(|tcx| tcx.sess)), |
3b2f2976 | 194 | tcx, |
b7449926 | 195 | last_source_file_index: 0, |
c30ab7b3 | 196 | lazy_state: LazyState::NoNode, |
dfeec247 XL |
197 | alloc_decoding_session: self |
198 | .cdata() | |
74b04a01 | 199 | .map(|cdata| cdata.cdata.alloc_decoding_state.new_decoding_session()), |
9e0c209e SL |
200 | } |
201 | } | |
b039eaaf SL |
202 | } |
203 | ||
9e0c209e | 204 | impl<'a, 'tcx> Metadata<'a, 'tcx> for &'a MetadataBlob { |
c295e0f8 XL |
205 | #[inline] |
206 | fn blob(self) -> &'a MetadataBlob { | |
207 | self | |
9e0c209e | 208 | } |
223e47cc LB |
209 | } |
210 | ||
dc9dc135 | 211 | impl<'a, 'tcx> Metadata<'a, 'tcx> for (&'a MetadataBlob, &'tcx Session) { |
c295e0f8 XL |
212 | #[inline] |
213 | fn blob(self) -> &'a MetadataBlob { | |
214 | self.0 | |
abe05a73 XL |
215 | } |
216 | ||
c295e0f8 | 217 | #[inline] |
dc9dc135 | 218 | fn sess(self) -> Option<&'tcx Session> { |
abe05a73 XL |
219 | let (_, sess) = self; |
220 | Some(sess) | |
221 | } | |
222 | } | |
223 | ||
5099ac24 | 224 | impl<'a, 'tcx> Metadata<'a, 'tcx> for CrateMetadataRef<'a> { |
c295e0f8 XL |
225 | #[inline] |
226 | fn blob(self) -> &'a MetadataBlob { | |
5099ac24 | 227 | &self.cdata.blob |
c30ab7b3 | 228 | } |
c295e0f8 | 229 | #[inline] |
74b04a01 | 230 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
5099ac24 | 231 | Some(self) |
c30ab7b3 | 232 | } |
a7813a04 XL |
233 | } |
234 | ||
5099ac24 | 235 | impl<'a, 'tcx> Metadata<'a, 'tcx> for (CrateMetadataRef<'a>, &'tcx Session) { |
c295e0f8 XL |
236 | #[inline] |
237 | fn blob(self) -> &'a MetadataBlob { | |
5099ac24 | 238 | &self.0.cdata.blob |
476ff2be | 239 | } |
c295e0f8 | 240 | #[inline] |
74b04a01 | 241 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
5099ac24 | 242 | Some(self.0) |
476ff2be | 243 | } |
c295e0f8 | 244 | #[inline] |
dc9dc135 | 245 | fn sess(self) -> Option<&'tcx Session> { |
5099ac24 | 246 | Some(self.1) |
476ff2be SL |
247 | } |
248 | } | |
249 | ||
5099ac24 | 250 | impl<'a, 'tcx> Metadata<'a, 'tcx> for (CrateMetadataRef<'a>, TyCtxt<'tcx>) { |
c295e0f8 XL |
251 | #[inline] |
252 | fn blob(self) -> &'a MetadataBlob { | |
5099ac24 | 253 | &self.0.cdata.blob |
c30ab7b3 | 254 | } |
c295e0f8 | 255 | #[inline] |
74b04a01 | 256 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
5099ac24 | 257 | Some(self.0) |
c30ab7b3 | 258 | } |
c295e0f8 | 259 | #[inline] |
dc9dc135 | 260 | fn tcx(self) -> Option<TyCtxt<'tcx>> { |
c30ab7b3 SL |
261 | Some(self.1) |
262 | } | |
223e47cc LB |
263 | } |
264 | ||
923072b8 FG |
265 | impl<T: ParameterizedOverTcx> LazyValue<T> { |
266 | fn decode<'a, 'tcx, M: Metadata<'a, 'tcx>>(self, metadata: M) -> T::Value<'tcx> | |
267 | where | |
268 | T::Value<'tcx>: Decodable<DecodeContext<'a, 'tcx>>, | |
269 | { | |
e74abb32 | 270 | let mut dcx = metadata.decoder(self.position.get()); |
9e0c209e | 271 | dcx.lazy_state = LazyState::NodeStart(self.position); |
923072b8 | 272 | T::Value::decode(&mut dcx) |
62682a34 SL |
273 | } |
274 | } | |
275 | ||
923072b8 FG |
276 | struct DecodeIterator<'a, 'tcx, T> { |
277 | elem_counter: std::ops::Range<usize>, | |
278 | dcx: DecodeContext<'a, 'tcx>, | |
279 | _phantom: PhantomData<fn() -> T>, | |
04454e1e FG |
280 | } |
281 | ||
923072b8 FG |
282 | impl<'a, 'tcx, T: Decodable<DecodeContext<'a, 'tcx>>> Iterator for DecodeIterator<'a, 'tcx, T> { |
283 | type Item = T; | |
5e7ed085 | 284 | |
923072b8 FG |
285 | #[inline(always)] |
286 | fn next(&mut self) -> Option<Self::Item> { | |
287 | self.elem_counter.next().map(|_| T::decode(&mut self.dcx)) | |
5e7ed085 | 288 | } |
5e7ed085 | 289 | |
923072b8 FG |
290 | #[inline(always)] |
291 | fn size_hint(&self) -> (usize, Option<usize>) { | |
292 | self.elem_counter.size_hint() | |
5e7ed085 FG |
293 | } |
294 | } | |
295 | ||
923072b8 FG |
296 | impl<'a, 'tcx, T: Decodable<DecodeContext<'a, 'tcx>>> ExactSizeIterator |
297 | for DecodeIterator<'a, 'tcx, T> | |
5e7ed085 | 298 | { |
923072b8 FG |
299 | fn len(&self) -> usize { |
300 | self.elem_counter.len() | |
5e7ed085 FG |
301 | } |
302 | } | |
303 | ||
923072b8 FG |
304 | unsafe impl<'a, 'tcx, T: Decodable<DecodeContext<'a, 'tcx>>> TrustedLen |
305 | for DecodeIterator<'a, 'tcx, T> | |
5e7ed085 | 306 | { |
5e7ed085 FG |
307 | } |
308 | ||
923072b8 FG |
309 | impl<T: ParameterizedOverTcx> LazyArray<T> { |
310 | fn decode<'a, 'tcx, M: Metadata<'a, 'tcx>>( | |
5e7ed085 | 311 | self, |
923072b8 FG |
312 | metadata: M, |
313 | ) -> DecodeIterator<'a, 'tcx, T::Value<'tcx>> | |
314 | where | |
315 | T::Value<'tcx>: Decodable<DecodeContext<'a, 'tcx>>, | |
316 | { | |
317 | let mut dcx = metadata.decoder(self.position.get()); | |
318 | dcx.lazy_state = LazyState::NodeStart(self.position); | |
319 | DecodeIterator { elem_counter: (0..self.num_elems), dcx, _phantom: PhantomData } | |
04454e1e FG |
320 | } |
321 | } | |
322 | ||
9e0c209e | 323 | impl<'a, 'tcx> DecodeContext<'a, 'tcx> { |
c295e0f8 | 324 | #[inline] |
e74abb32 | 325 | fn tcx(&self) -> TyCtxt<'tcx> { |
c295e0f8 XL |
326 | debug_assert!(self.tcx.is_some(), "missing TyCtxt in DecodeContext"); |
327 | self.tcx.unwrap() | |
328 | } | |
329 | ||
330 | #[inline] | |
331 | pub fn blob(&self) -> &'a MetadataBlob { | |
332 | self.blob | |
9e0c209e | 333 | } |
223e47cc | 334 | |
c295e0f8 XL |
335 | #[inline] |
336 | pub fn cdata(&self) -> CrateMetadataRef<'a> { | |
337 | debug_assert!(self.cdata.is_some(), "missing CrateMetadata in DecodeContext"); | |
338 | self.cdata.unwrap() | |
9e0c209e | 339 | } |
a7813a04 | 340 | |
04454e1e | 341 | #[inline] |
17df50a5 | 342 | fn map_encoded_cnum_to_current(&self, cnum: CrateNum) -> CrateNum { |
04454e1e | 343 | self.cdata().map_encoded_cnum_to_current(cnum) |
17df50a5 XL |
344 | } |
345 | ||
923072b8 FG |
346 | #[inline] |
347 | fn read_lazy_offset_then<T>(&mut self, f: impl Fn(NonZeroUsize) -> T) -> T { | |
5099ac24 | 348 | let distance = self.read_usize(); |
9e0c209e | 349 | let position = match self.lazy_state { |
e1599b0c | 350 | LazyState::NoNode => bug!("read_lazy_with_meta: outside of a metadata node"), |
9e0c209e | 351 | LazyState::NodeStart(start) => { |
e74abb32 | 352 | let start = start.get(); |
5099ac24 FG |
353 | assert!(distance <= start); |
354 | start - distance | |
9e0c209e | 355 | } |
5099ac24 | 356 | LazyState::Previous(last_pos) => last_pos.get() + distance, |
9e0c209e | 357 | }; |
923072b8 FG |
358 | let position = NonZeroUsize::new(position).unwrap(); |
359 | self.lazy_state = LazyState::Previous(position); | |
360 | f(position) | |
361 | } | |
362 | ||
363 | fn read_lazy<T>(&mut self) -> LazyValue<T> { | |
364 | self.read_lazy_offset_then(|pos| LazyValue::from_position(pos)) | |
365 | } | |
366 | ||
367 | fn read_lazy_array<T>(&mut self, len: usize) -> LazyArray<T> { | |
368 | self.read_lazy_offset_then(|pos| LazyArray::from_position_and_num_elems(pos, len)) | |
369 | } | |
370 | ||
371 | fn read_lazy_table<I, T>(&mut self, len: usize) -> LazyTable<I, T> { | |
372 | self.read_lazy_offset_then(|pos| LazyTable::from_position_and_encoded_size(pos, len)) | |
9e0c209e | 373 | } |
c295e0f8 XL |
374 | |
375 | #[inline] | |
5e7ed085 | 376 | pub fn read_raw_bytes(&mut self, len: usize) -> &[u8] { |
c295e0f8 XL |
377 | self.opaque.read_raw_bytes(len) |
378 | } | |
223e47cc LB |
379 | } |
380 | ||
923072b8 | 381 | impl<'a, 'tcx> TyDecoder for DecodeContext<'a, 'tcx> { |
3dfed10e XL |
382 | const CLEAR_CROSS_CRATE: bool = true; |
383 | ||
923072b8 FG |
384 | type I = TyCtxt<'tcx>; |
385 | ||
abe05a73 | 386 | #[inline] |
923072b8 FG |
387 | fn interner(&self) -> Self::I { |
388 | self.tcx() | |
abe05a73 XL |
389 | } |
390 | ||
391 | #[inline] | |
392 | fn peek_byte(&self) -> u8 { | |
393 | self.opaque.data[self.opaque.position()] | |
9e0c209e | 394 | } |
223e47cc | 395 | |
abe05a73 XL |
396 | #[inline] |
397 | fn position(&self) -> usize { | |
398 | self.opaque.position() | |
399 | } | |
223e47cc | 400 | |
5099ac24 | 401 | fn cached_ty_for_shorthand<F>(&mut self, shorthand: usize, or_insert_with: F) -> Ty<'tcx> |
dfeec247 | 402 | where |
5099ac24 | 403 | F: FnOnce(&mut Self) -> Ty<'tcx>, |
abe05a73 XL |
404 | { |
405 | let tcx = self.tcx(); | |
223e47cc | 406 | |
17df50a5 | 407 | let key = ty::CReaderCacheKey { cnum: Some(self.cdata().cnum), pos: shorthand }; |
1a4d82fc | 408 | |
f035d41b | 409 | if let Some(&ty) = tcx.ty_rcache.borrow().get(&key) { |
5099ac24 | 410 | return ty; |
abe05a73 | 411 | } |
223e47cc | 412 | |
5099ac24 | 413 | let ty = or_insert_with(self); |
f035d41b | 414 | tcx.ty_rcache.borrow_mut().insert(key, ty); |
5099ac24 | 415 | ty |
9e0c209e | 416 | } |
62682a34 | 417 | |
abe05a73 | 418 | fn with_position<F, R>(&mut self, pos: usize, f: F) -> R |
dfeec247 XL |
419 | where |
420 | F: FnOnce(&mut Self) -> R, | |
abe05a73 | 421 | { |
923072b8 | 422 | let new_opaque = MemDecoder::new(self.opaque.data, pos); |
abe05a73 XL |
423 | let old_opaque = mem::replace(&mut self.opaque, new_opaque); |
424 | let old_state = mem::replace(&mut self.lazy_state, LazyState::NoNode); | |
425 | let r = f(self); | |
426 | self.opaque = old_opaque; | |
427 | self.lazy_state = old_state; | |
428 | r | |
429 | } | |
430 | ||
5099ac24 | 431 | fn decode_alloc_id(&mut self) -> rustc_middle::mir::interpret::AllocId { |
3dfed10e XL |
432 | if let Some(alloc_decoding_session) = self.alloc_decoding_session { |
433 | alloc_decoding_session.decode_alloc_id(self) | |
434 | } else { | |
435 | bug!("Attempting to decode interpret::AllocId without CrateMetadata") | |
436 | } | |
9e0c209e | 437 | } |
223e47cc LB |
438 | } |
439 | ||
3dfed10e | 440 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for CrateNum { |
5099ac24 FG |
441 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> CrateNum { |
442 | let cnum = CrateNum::from_u32(d.read_u32()); | |
443 | d.map_encoded_cnum_to_current(cnum) | |
9e0c209e | 444 | } |
970d7e83 LB |
445 | } |
446 | ||
3dfed10e | 447 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for DefIndex { |
5099ac24 FG |
448 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> DefIndex { |
449 | DefIndex::from_u32(d.read_u32()) | |
e74abb32 XL |
450 | } |
451 | } | |
abe05a73 | 452 | |
136023e0 | 453 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for ExpnIndex { |
5099ac24 FG |
454 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> ExpnIndex { |
455 | ExpnIndex::from_u32(d.read_u32()) | |
136023e0 XL |
456 | } |
457 | } | |
458 | ||
3dfed10e | 459 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for SyntaxContext { |
5099ac24 | 460 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> SyntaxContext { |
3dfed10e XL |
461 | let cdata = decoder.cdata(); |
462 | let sess = decoder.sess.unwrap(); | |
463 | let cname = cdata.root.name; | |
464 | rustc_span::hygiene::decode_syntax_context(decoder, &cdata.hygiene_context, |_, id| { | |
465 | debug!("SpecializedDecoder<SyntaxContext>: decoding {}", id); | |
5099ac24 | 466 | cdata |
3dfed10e XL |
467 | .root |
468 | .syntax_contexts | |
5099ac24 | 469 | .get(cdata, id) |
3dfed10e | 470 | .unwrap_or_else(|| panic!("Missing SyntaxContext {:?} for crate {:?}", id, cname)) |
5099ac24 | 471 | .decode((cdata, sess)) |
3dfed10e | 472 | }) |
1a4d82fc JJ |
473 | } |
474 | } | |
475 | ||
3dfed10e | 476 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for ExpnId { |
5099ac24 | 477 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> ExpnId { |
3dfed10e XL |
478 | let local_cdata = decoder.cdata(); |
479 | let sess = decoder.sess.unwrap(); | |
0531ce1d | 480 | |
5099ac24 FG |
481 | let cnum = CrateNum::decode(decoder); |
482 | let index = u32::decode(decoder); | |
136023e0 XL |
483 | |
484 | let expn_id = rustc_span::hygiene::decode_expn_id(cnum, index, |expn_id| { | |
485 | let ExpnId { krate: cnum, local_id: index } = expn_id; | |
486 | // Lookup local `ExpnData`s in our own crate data. Foreign `ExpnData`s | |
487 | // are stored in the owning crate, to avoid duplication. | |
488 | debug_assert_ne!(cnum, LOCAL_CRATE); | |
489 | let crate_data = if cnum == local_cdata.cnum { | |
490 | local_cdata | |
491 | } else { | |
492 | local_cdata.cstore.get_crate_data(cnum) | |
493 | }; | |
494 | let expn_data = crate_data | |
495 | .root | |
496 | .expn_data | |
5099ac24 | 497 | .get(crate_data, index) |
136023e0 | 498 | .unwrap() |
5099ac24 | 499 | .decode((crate_data, sess)); |
136023e0 XL |
500 | let expn_hash = crate_data |
501 | .root | |
502 | .expn_hashes | |
5099ac24 | 503 | .get(crate_data, index) |
136023e0 | 504 | .unwrap() |
5099ac24 | 505 | .decode((crate_data, sess)); |
136023e0 XL |
506 | (expn_data, expn_hash) |
507 | }); | |
5099ac24 | 508 | expn_id |
0531ce1d XL |
509 | } |
510 | } | |
511 | ||
3dfed10e | 512 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for Span { |
5099ac24 FG |
513 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Span { |
514 | let ctxt = SyntaxContext::decode(decoder); | |
515 | let tag = u8::decode(decoder); | |
85aaf69f | 516 | |
cdc7bbd5 | 517 | if tag == TAG_PARTIAL_SPAN { |
5099ac24 | 518 | return DUMMY_SP.with_ctxt(ctxt); |
ff7c6d11 XL |
519 | } |
520 | ||
ba9703b0 | 521 | debug_assert!(tag == TAG_VALID_SPAN_LOCAL || tag == TAG_VALID_SPAN_FOREIGN); |
2c00a5a8 | 522 | |
5099ac24 FG |
523 | let lo = BytePos::decode(decoder); |
524 | let len = BytePos::decode(decoder); | |
2c00a5a8 | 525 | let hi = lo + len; |
ff7c6d11 | 526 | |
3c0e092e | 527 | let Some(sess) = decoder.sess else { |
abe05a73 | 528 | bug!("Cannot decode Span without Session.") |
9e0c209e | 529 | }; |
85aaf69f | 530 | |
ba9703b0 XL |
531 | // There are two possibilities here: |
532 | // 1. This is a 'local span', which is located inside a `SourceFile` | |
533 | // that came from this crate. In this case, we use the source map data | |
534 | // encoded in this crate. This branch should be taken nearly all of the time. | |
535 | // 2. This is a 'foreign span', which is located inside a `SourceFile` | |
536 | // that came from a *different* crate (some crate upstream of the one | |
537 | // whose metadata we're looking at). For example, consider this dependency graph: | |
538 | // | |
539 | // A -> B -> C | |
540 | // | |
541 | // Suppose that we're currently compiling crate A, and start deserializing | |
542 | // metadata from crate B. When we deserialize a Span from crate B's metadata, | |
5e7ed085 | 543 | // there are two possibilities: |
ba9703b0 XL |
544 | // |
545 | // 1. The span references a file from crate B. This makes it a 'local' span, | |
546 | // which means that we can use crate B's serialized source map information. | |
547 | // 2. The span references a file from crate C. This makes it a 'foreign' span, | |
548 | // which means we need to use Crate *C* (not crate B) to determine the source | |
549 | // map information. We only record source map information for a file in the | |
550 | // crate that 'owns' it, so deserializing a Span may require us to look at | |
551 | // a transitive dependency. | |
552 | // | |
553 | // When we encode a foreign span, we adjust its 'lo' and 'high' values | |
554 | // to be based on the *foreign* crate (e.g. crate C), not the crate | |
555 | // we are writing metadata for (e.g. crate B). This allows us to | |
556 | // treat the 'local' and 'foreign' cases almost identically during deserialization: | |
557 | // we can call `imported_source_files` for the proper crate, and binary search | |
558 | // through the returned slice using our span. | |
559 | let imported_source_files = if tag == TAG_VALID_SPAN_LOCAL { | |
3dfed10e | 560 | decoder.cdata().imported_source_files(sess) |
ba9703b0 | 561 | } else { |
f035d41b XL |
562 | // When we encode a proc-macro crate, all `Span`s should be encoded |
563 | // with `TAG_VALID_SPAN_LOCAL` | |
3dfed10e | 564 | if decoder.cdata().root.is_proc_macro_crate() { |
ba9703b0 XL |
565 | // Decode `CrateNum` as u32 - using `CrateNum::decode` will ICE |
566 | // since we don't have `cnum_map` populated. | |
5099ac24 | 567 | let cnum = u32::decode(decoder); |
f035d41b XL |
568 | panic!( |
569 | "Decoding of crate {:?} tried to access proc-macro dep {:?}", | |
3dfed10e | 570 | decoder.cdata().root.name, |
f035d41b XL |
571 | cnum |
572 | ); | |
ba9703b0 XL |
573 | } |
574 | // tag is TAG_VALID_SPAN_FOREIGN, checked by `debug_assert` above | |
5099ac24 | 575 | let cnum = CrateNum::decode(decoder); |
ba9703b0 XL |
576 | debug!( |
577 | "SpecializedDecoder<Span>::specialized_decode: loading source files from cnum {:?}", | |
578 | cnum | |
579 | ); | |
580 | ||
581 | // Decoding 'foreign' spans should be rare enough that it's | |
582 | // not worth it to maintain a per-CrateNum cache for `last_source_file_index`. | |
583 | // We just set it to 0, to ensure that we don't try to access something out | |
584 | // of bounds for our initial 'guess' | |
3dfed10e | 585 | decoder.last_source_file_index = 0; |
ba9703b0 | 586 | |
3dfed10e | 587 | let foreign_data = decoder.cdata().cstore.get_crate_data(cnum); |
ba9703b0 XL |
588 | foreign_data.imported_source_files(sess) |
589 | }; | |
590 | ||
b7449926 | 591 | let source_file = { |
9e0c209e | 592 | // Optimize for the case that most spans within a translated item |
b7449926 | 593 | // originate from the same source_file. |
3dfed10e | 594 | let last_source_file = &imported_source_files[decoder.last_source_file_index]; |
9e0c209e | 595 | |
dfeec247 XL |
596 | if lo >= last_source_file.original_start_pos && lo <= last_source_file.original_end_pos |
597 | { | |
b7449926 | 598 | last_source_file |
9e0c209e | 599 | } else { |
74b04a01 XL |
600 | let index = imported_source_files |
601 | .binary_search_by_key(&lo, |source_file| source_file.original_start_pos) | |
602 | .unwrap_or_else(|index| index - 1); | |
e9174d1e | 603 | |
ba9703b0 XL |
604 | // Don't try to cache the index for foreign spans, |
605 | // as this would require a map from CrateNums to indices | |
606 | if tag == TAG_VALID_SPAN_LOCAL { | |
3dfed10e | 607 | decoder.last_source_file_index = index; |
ba9703b0 | 608 | } |
74b04a01 | 609 | &imported_source_files[index] |
e9174d1e | 610 | } |
9e0c209e SL |
611 | }; |
612 | ||
ff7c6d11 | 613 | // Make sure our binary search above is correct. |
ba9703b0 XL |
614 | debug_assert!( |
615 | lo >= source_file.original_start_pos && lo <= source_file.original_end_pos, | |
616 | "Bad binary search: lo={:?} source_file.original_start_pos={:?} source_file.original_end_pos={:?}", | |
617 | lo, | |
618 | source_file.original_start_pos, | |
619 | source_file.original_end_pos | |
620 | ); | |
ff7c6d11 | 621 | |
2c00a5a8 | 622 | // Make sure we correctly filtered out invalid spans during encoding |
ba9703b0 XL |
623 | debug_assert!( |
624 | hi >= source_file.original_start_pos && hi <= source_file.original_end_pos, | |
625 | "Bad binary search: hi={:?} source_file.original_start_pos={:?} source_file.original_end_pos={:?}", | |
626 | hi, | |
627 | source_file.original_start_pos, | |
628 | source_file.original_end_pos | |
629 | ); | |
ff7c6d11 | 630 | |
dfeec247 XL |
631 | let lo = |
632 | (lo + source_file.translated_source_file.start_pos) - source_file.original_start_pos; | |
633 | let hi = | |
634 | (hi + source_file.translated_source_file.start_pos) - source_file.original_start_pos; | |
9e0c209e | 635 | |
c295e0f8 | 636 | // Do not try to decode parent for foreign spans. |
5099ac24 | 637 | Span::new(lo, hi, ctxt, None) |
e1599b0c XL |
638 | } |
639 | } | |
640 | ||
c295e0f8 | 641 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for &'tcx [thir::abstract_const::Node<'tcx>] { |
5099ac24 | 642 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> Self { |
1b1a35ee XL |
643 | ty::codec::RefDecodable::decode(d) |
644 | } | |
645 | } | |
646 | ||
3dfed10e | 647 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for &'tcx [(ty::Predicate<'tcx>, Span)] { |
5099ac24 | 648 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> Self { |
3dfed10e XL |
649 | ty::codec::RefDecodable::decode(d) |
650 | } | |
651 | } | |
652 | ||
923072b8 | 653 | impl<'a, 'tcx, T> Decodable<DecodeContext<'a, 'tcx>> for LazyValue<T> { |
5099ac24 | 654 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Self { |
923072b8 | 655 | decoder.read_lazy() |
2c00a5a8 XL |
656 | } |
657 | } | |
658 | ||
923072b8 | 659 | impl<'a, 'tcx, T> Decodable<DecodeContext<'a, 'tcx>> for LazyArray<T> { |
5099ac24 FG |
660 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Self { |
661 | let len = decoder.read_usize(); | |
923072b8 | 662 | if len == 0 { LazyArray::empty() } else { decoder.read_lazy_array(len) } |
3dfed10e XL |
663 | } |
664 | } | |
665 | ||
923072b8 | 666 | impl<'a, 'tcx, I: Idx, T> Decodable<DecodeContext<'a, 'tcx>> for LazyTable<I, T> { |
5099ac24 FG |
667 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Self { |
668 | let len = decoder.read_usize(); | |
923072b8 | 669 | decoder.read_lazy_table(len) |
ff7c6d11 XL |
670 | } |
671 | } | |
672 | ||
dfeec247 | 673 | implement_ty_decoder!(DecodeContext<'a, 'tcx>); |
ea8adc8c | 674 | |
923072b8 FG |
675 | impl MetadataBlob { |
676 | pub(crate) fn new(metadata_ref: MetadataRef) -> MetadataBlob { | |
c295e0f8 | 677 | MetadataBlob(Lrc::new(metadata_ref)) |
60c5eb7d XL |
678 | } |
679 | ||
923072b8 | 680 | pub(crate) fn is_compatible(&self) -> bool { |
c295e0f8 | 681 | self.blob().starts_with(METADATA_HEADER) |
85aaf69f | 682 | } |
85aaf69f | 683 | |
923072b8 FG |
684 | pub(crate) fn get_rustc_version(&self) -> String { |
685 | LazyValue::<String>::from_position(NonZeroUsize::new(METADATA_HEADER.len() + 4).unwrap()) | |
dfeec247 | 686 | .decode(self) |
476ff2be SL |
687 | } |
688 | ||
923072b8 | 689 | pub(crate) fn get_root(&self) -> CrateRoot { |
c295e0f8 | 690 | let slice = &self.blob()[..]; |
9e0c209e | 691 | let offset = METADATA_HEADER.len(); |
dfeec247 XL |
692 | let pos = (((slice[offset + 0] as u32) << 24) |
693 | | ((slice[offset + 1] as u32) << 16) | |
694 | | ((slice[offset + 2] as u32) << 8) | |
695 | | ((slice[offset + 3] as u32) << 0)) as usize; | |
923072b8 | 696 | LazyValue::<CrateRoot>::from_position(NonZeroUsize::new(pos).unwrap()).decode(self) |
9e0c209e SL |
697 | } |
698 | ||
923072b8 | 699 | pub(crate) fn list_crate_metadata(&self, out: &mut dyn io::Write) -> io::Result<()> { |
9e0c209e | 700 | let root = self.get_root(); |
136023e0 XL |
701 | writeln!(out, "Crate info:")?; |
702 | writeln!(out, "name {}{}", root.name, root.extra_filename)?; | |
703 | writeln!(out, "hash {} stable_crate_id {:?}", root.hash, root.stable_crate_id)?; | |
704 | writeln!(out, "proc_macro {:?}", root.proc_macro_data.is_some())?; | |
705 | writeln!(out, "=External Dependencies=")?; | |
dfeec247 | 706 | for (i, dep) in root.crate_deps.decode(self).enumerate() { |
136023e0 XL |
707 | writeln!( |
708 | out, | |
709 | "{} {}{} hash {} host_hash {:?} kind {:?}", | |
710 | i + 1, | |
711 | dep.name, | |
712 | dep.extra_filename, | |
713 | dep.hash, | |
714 | dep.host_hash, | |
715 | dep.kind | |
716 | )?; | |
1a4d82fc | 717 | } |
9e0c209e SL |
718 | write!(out, "\n")?; |
719 | Ok(()) | |
970d7e83 | 720 | } |
223e47cc LB |
721 | } |
722 | ||
923072b8 FG |
723 | impl CrateRoot { |
724 | pub(crate) fn is_proc_macro_crate(&self) -> bool { | |
60c5eb7d XL |
725 | self.proc_macro_data.is_some() |
726 | } | |
727 | ||
923072b8 | 728 | pub(crate) fn name(&self) -> Symbol { |
60c5eb7d XL |
729 | self.name |
730 | } | |
731 | ||
923072b8 | 732 | pub(crate) fn hash(&self) -> Svh { |
60c5eb7d XL |
733 | self.hash |
734 | } | |
735 | ||
923072b8 | 736 | pub(crate) fn stable_crate_id(&self) -> StableCrateId { |
6a06907d XL |
737 | self.stable_crate_id |
738 | } | |
739 | ||
923072b8 | 740 | pub(crate) fn triple(&self) -> &TargetTriple { |
60c5eb7d XL |
741 | &self.triple |
742 | } | |
743 | ||
923072b8 | 744 | pub(crate) fn decode_crate_deps<'a>( |
60c5eb7d XL |
745 | &self, |
746 | metadata: &'a MetadataBlob, | |
747 | ) -> impl ExactSizeIterator<Item = CrateDep> + Captures<'a> { | |
748 | self.crate_deps.decode(metadata) | |
749 | } | |
750 | } | |
751 | ||
74b04a01 | 752 | impl<'a, 'tcx> CrateMetadataRef<'a> { |
5099ac24 | 753 | fn raw_proc_macro(self, id: DefIndex) -> &'a ProcMacro { |
e1599b0c XL |
754 | // DefIndex's in root.proc_macro_data have a one-to-one correspondence |
755 | // with items in 'raw_proc_macros'. | |
1b1a35ee XL |
756 | let pos = self |
757 | .root | |
758 | .proc_macro_data | |
759 | .as_ref() | |
760 | .unwrap() | |
761 | .macros | |
762 | .decode(self) | |
763 | .position(|i| i == id) | |
764 | .unwrap(); | |
e1599b0c XL |
765 | &self.raw_proc_macros.unwrap()[pos] |
766 | } | |
767 | ||
5e7ed085 FG |
768 | fn opt_item_name(self, item_index: DefIndex) -> Option<Symbol> { |
769 | self.def_key(item_index).disambiguated_data.data.get_opt_name() | |
770 | } | |
771 | ||
772 | fn item_name(self, item_index: DefIndex) -> Symbol { | |
773 | self.opt_item_name(item_index).expect("no encoded ident for item") | |
774 | } | |
775 | ||
5099ac24 | 776 | fn opt_item_ident(self, item_index: DefIndex, sess: &Session) -> Option<Ident> { |
5e7ed085 | 777 | let name = self.opt_item_name(item_index)?; |
923072b8 FG |
778 | let span = |
779 | self.root.tables.def_ident_span.get(self, item_index).unwrap().decode((self, sess)); | |
a2a8927a | 780 | Some(Ident::new(name, span)) |
223e47cc | 781 | } |
223e47cc | 782 | |
5099ac24 | 783 | fn item_ident(self, item_index: DefIndex, sess: &Session) -> Ident { |
a2a8927a | 784 | self.opt_item_ident(item_index, sess).expect("no encoded ident for item") |
5869c6ff XL |
785 | } |
786 | ||
5099ac24 | 787 | fn maybe_kind(self, item_id: DefIndex) -> Option<EntryKind> { |
5869c6ff XL |
788 | self.root.tables.kind.get(self, item_id).map(|k| k.decode(self)) |
789 | } | |
790 | ||
04454e1e FG |
791 | #[inline] |
792 | pub(super) fn map_encoded_cnum_to_current(self, cnum: CrateNum) -> CrateNum { | |
793 | if cnum == LOCAL_CRATE { self.cnum } else { self.cnum_map[cnum] } | |
794 | } | |
795 | ||
5099ac24 | 796 | fn kind(self, item_id: DefIndex) -> EntryKind { |
5869c6ff XL |
797 | self.maybe_kind(item_id).unwrap_or_else(|| { |
798 | bug!( | |
799 | "CrateMetadata::kind({:?}): id not found, in crate {:?} with number {}", | |
800 | item_id, | |
801 | self.root.name, | |
802 | self.cnum, | |
803 | ) | |
804 | }) | |
805 | } | |
806 | ||
5099ac24 | 807 | fn def_kind(self, item_id: DefIndex) -> DefKind { |
04454e1e FG |
808 | self.root.tables.opt_def_kind.get(self, item_id).unwrap_or_else(|| { |
809 | bug!( | |
810 | "CrateMetadata::def_kind({:?}): id not found, in crate {:?} with number {}", | |
811 | item_id, | |
812 | self.root.name, | |
813 | self.cnum, | |
814 | ) | |
815 | }) | |
476ff2be SL |
816 | } |
817 | ||
5099ac24 | 818 | fn get_span(self, index: DefIndex, sess: &Session) -> Span { |
1b1a35ee XL |
819 | self.root |
820 | .tables | |
5e7ed085 | 821 | .def_span |
1b1a35ee XL |
822 | .get(self, index) |
823 | .unwrap_or_else(|| panic!("Missing span for {:?}", index)) | |
824 | .decode((self, sess)) | |
e1599b0c XL |
825 | } |
826 | ||
5099ac24 | 827 | fn load_proc_macro(self, id: DefIndex, sess: &Session) -> SyntaxExtension { |
136023e0 | 828 | let (name, kind, helper_attrs) = match *self.raw_proc_macro(id) { |
e1599b0c XL |
829 | ProcMacro::CustomDerive { trait_name, attributes, client } => { |
830 | let helper_attrs = | |
831 | attributes.iter().cloned().map(Symbol::intern).collect::<Vec<_>>(); | |
832 | ( | |
833 | trait_name, | |
923072b8 | 834 | SyntaxExtensionKind::Derive(Box::new(DeriveProcMacro { client })), |
e1599b0c XL |
835 | helper_attrs, |
836 | ) | |
837 | } | |
136023e0 XL |
838 | ProcMacro::Attr { name, client } => { |
839 | (name, SyntaxExtensionKind::Attr(Box::new(AttrProcMacro { client })), Vec::new()) | |
840 | } | |
841 | ProcMacro::Bang { name, client } => { | |
842 | (name, SyntaxExtensionKind::Bang(Box::new(BangProcMacro { client })), Vec::new()) | |
843 | } | |
e1599b0c | 844 | }; |
e1599b0c | 845 | |
136023e0 | 846 | let attrs: Vec<_> = self.get_item_attrs(id, sess).collect(); |
e1599b0c | 847 | SyntaxExtension::new( |
3dfed10e | 848 | sess, |
e1599b0c | 849 | kind, |
136023e0 | 850 | self.get_span(id, sess), |
e1599b0c | 851 | helper_attrs, |
e74abb32 | 852 | self.root.edition, |
e1599b0c | 853 | Symbol::intern(name), |
fc512014 | 854 | &attrs, |
e1599b0c | 855 | ) |
7453a54e SL |
856 | } |
857 | ||
5e7ed085 | 858 | fn get_variant(self, kind: &EntryKind, index: DefIndex, parent_did: DefId) -> ty::VariantDef { |
e74abb32 | 859 | let data = match kind { |
5e7ed085 | 860 | EntryKind::Variant(data) | EntryKind::Struct(data) | EntryKind::Union(data) => { |
dfeec247 XL |
861 | data.decode(self) |
862 | } | |
c30ab7b3 | 863 | _ => bug!(), |
9cc50fc6 | 864 | }; |
9cc50fc6 | 865 | |
e74abb32 XL |
866 | let adt_kind = match kind { |
867 | EntryKind::Variant(_) => ty::AdtKind::Enum, | |
868 | EntryKind::Struct(..) => ty::AdtKind::Struct, | |
869 | EntryKind::Union(..) => ty::AdtKind::Union, | |
870 | _ => bug!(), | |
871 | }; | |
872 | ||
dfeec247 XL |
873 | let variant_did = |
874 | if adt_kind == ty::AdtKind::Enum { Some(self.local_def_id(index)) } else { None }; | |
532ac7d7 | 875 | let ctor_did = data.ctor.map(|index| self.local_def_id(index)); |
0bf4aa26 | 876 | |
b7449926 | 877 | ty::VariantDef::new( |
5e7ed085 | 878 | self.item_name(index), |
532ac7d7 XL |
879 | variant_did, |
880 | ctor_did, | |
b7449926 | 881 | data.discr, |
dfeec247 | 882 | self.root |
ba9703b0 | 883 | .tables |
dfeec247 XL |
884 | .children |
885 | .get(self, index) | |
923072b8 | 886 | .unwrap_or_else(LazyArray::empty) |
dfeec247 XL |
887 | .decode(self) |
888 | .map(|index| ty::FieldDef { | |
476ff2be | 889 | did: self.local_def_id(index), |
5e7ed085 | 890 | name: self.item_name(index), |
e74abb32 | 891 | vis: self.get_visibility(index), |
dfeec247 XL |
892 | }) |
893 | .collect(), | |
0bf4aa26 | 894 | data.ctor_kind, |
532ac7d7 XL |
895 | adt_kind, |
896 | parent_did, | |
897 | false, | |
3dfed10e | 898 | data.is_non_exhaustive, |
b7449926 | 899 | ) |
c30ab7b3 SL |
900 | } |
901 | ||
5e7ed085 | 902 | fn get_adt_def(self, item_id: DefIndex, tcx: TyCtxt<'tcx>) -> ty::AdtDef<'tcx> { |
e74abb32 | 903 | let kind = self.kind(item_id); |
9e0c209e | 904 | let did = self.local_def_id(item_id); |
94b46f34 | 905 | |
5e7ed085 FG |
906 | let adt_kind = match kind { |
907 | EntryKind::Enum => ty::AdtKind::Enum, | |
908 | EntryKind::Struct(_) => ty::AdtKind::Struct, | |
909 | EntryKind::Union(_) => ty::AdtKind::Union, | |
8bb4bdeb XL |
910 | _ => bug!("get_adt_def called on a non-ADT {:?}", did), |
911 | }; | |
5e7ed085 | 912 | let repr = self.root.tables.repr_options.get(self, item_id).unwrap().decode(self); |
94b46f34 | 913 | |
e74abb32 | 914 | let variants = if let ty::AdtKind::Enum = adt_kind { |
dfeec247 | 915 | self.root |
ba9703b0 | 916 | .tables |
dfeec247 XL |
917 | .children |
918 | .get(self, item_id) | |
923072b8 | 919 | .unwrap_or_else(LazyArray::empty) |
c30ab7b3 | 920 | .decode(self) |
5e7ed085 | 921 | .map(|index| self.get_variant(&self.kind(index), index, did)) |
c30ab7b3 SL |
922 | .collect() |
923 | } else { | |
5e7ed085 | 924 | std::iter::once(self.get_variant(&kind, item_id, did)).collect() |
9e0c209e | 925 | }; |
9cc50fc6 | 926 | |
e74abb32 | 927 | tcx.alloc_adt_def(did, adt_kind, variants, repr) |
9cc50fc6 SL |
928 | } |
929 | ||
5099ac24 | 930 | fn get_generics(self, item_id: DefIndex, sess: &Session) -> ty::Generics { |
5e7ed085 | 931 | self.root.tables.generics_of.get(self, item_id).unwrap().decode((self, sess)) |
9e0c209e | 932 | } |
1a4d82fc | 933 | |
5099ac24 | 934 | fn get_visibility(self, id: DefIndex) -> ty::Visibility { |
fc512014 | 935 | self.root.tables.visibility.get(self, id).unwrap().decode(self) |
9e0c209e | 936 | } |
1a4d82fc | 937 | |
5099ac24 | 938 | fn get_trait_item_def_id(self, id: DefIndex) -> Option<DefId> { |
923072b8 | 939 | self.root.tables.trait_item_def_id.get(self, id).map(|d| d.decode_from_cdata(self)) |
5099ac24 FG |
940 | } |
941 | ||
5099ac24 | 942 | fn get_expn_that_defined(self, id: DefIndex, sess: &Session) -> ExpnId { |
29967ef6 XL |
943 | self.root.tables.expn_that_defined.get(self, id).unwrap().decode((self, sess)) |
944 | } | |
945 | ||
04454e1e FG |
946 | fn get_debugger_visualizers(self) -> Vec<rustc_span::DebuggerVisualizerFile> { |
947 | self.root.debugger_visualizers.decode(self).collect::<Vec<_>>() | |
948 | } | |
949 | ||
b7449926 | 950 | /// Iterates over all the stability attributes in the given crate. |
5099ac24 | 951 | fn get_lib_features(self, tcx: TyCtxt<'tcx>) -> &'tcx [(Symbol, Option<Symbol>)] { |
dfeec247 | 952 | tcx.arena.alloc_from_iter(self.root.lib_features.decode(self)) |
9e0c209e | 953 | } |
223e47cc | 954 | |
b7449926 | 955 | /// Iterates over the language items in the given crate. |
5e7ed085 FG |
956 | fn get_lang_items(self, tcx: TyCtxt<'tcx>) -> &'tcx [(DefId, usize)] { |
957 | tcx.arena.alloc_from_iter( | |
958 | self.root | |
959 | .lang_items | |
960 | .decode(self) | |
961 | .map(move |(def_index, index)| (self.local_def_id(def_index), index)), | |
962 | ) | |
b7449926 XL |
963 | } |
964 | ||
e1599b0c | 965 | /// Iterates over the diagnostic items in the given crate. |
5099ac24 FG |
966 | fn get_diagnostic_items(self) -> DiagnosticItems { |
967 | let mut id_to_name = FxHashMap::default(); | |
968 | let name_to_id = self | |
969 | .root | |
970 | .diagnostic_items | |
971 | .decode(self) | |
972 | .map(|(name, def_index)| { | |
973 | let id = self.local_def_id(def_index); | |
974 | id_to_name.insert(id, name); | |
975 | (name, id) | |
976 | }) | |
977 | .collect(); | |
978 | DiagnosticItems { id_to_name, name_to_id } | |
e1599b0c XL |
979 | } |
980 | ||
5099ac24 FG |
981 | /// Iterates over all named children of the given module, |
982 | /// including both proper items and reexports. | |
983 | /// Module here is understood in name resolution sense - it can be a `mod` item, | |
984 | /// or a crate root, or an enum, or a trait. | |
985 | fn for_each_module_child( | |
986 | self, | |
987 | id: DefIndex, | |
988 | mut callback: impl FnMut(ModChild), | |
989 | sess: &Session, | |
990 | ) { | |
1b1a35ee | 991 | if let Some(data) = &self.root.proc_macro_data { |
5099ac24 FG |
992 | // If we are loading as a proc macro, we want to return |
993 | // the view of this crate as a proc macro crate. | |
476ff2be | 994 | if id == CRATE_DEF_INDEX { |
5099ac24 | 995 | for def_index in data.macros.decode(self) { |
e1599b0c | 996 | let raw_macro = self.raw_proc_macro(def_index); |
48663c56 | 997 | let res = Res::Def( |
e1599b0c XL |
998 | DefKind::Macro(macro_kind(raw_macro)), |
999 | self.local_def_id(def_index), | |
8bb4bdeb | 1000 | ); |
f035d41b | 1001 | let ident = self.item_ident(def_index, sess); |
5099ac24 FG |
1002 | callback(ModChild { |
1003 | ident, | |
1004 | res, | |
1005 | vis: ty::Visibility::Public, | |
1006 | span: ident.span, | |
5e7ed085 | 1007 | macro_rules: false, |
5099ac24 | 1008 | }); |
476ff2be SL |
1009 | } |
1010 | } | |
dfeec247 | 1011 | return; |
476ff2be SL |
1012 | } |
1013 | ||
9e0c209e | 1014 | // Iterate over all children. |
a2a8927a | 1015 | if let Some(children) = self.root.tables.children.get(self, id) { |
5869c6ff | 1016 | for child_index in children.decode((self, sess)) { |
04454e1e FG |
1017 | let ident = self.item_ident(child_index, sess); |
1018 | let kind = self.def_kind(child_index); | |
1019 | let def_id = self.local_def_id(child_index); | |
1020 | let res = Res::Def(kind, def_id); | |
1021 | let vis = self.get_visibility(child_index); | |
1022 | let span = self.get_span(child_index, sess); | |
1023 | let macro_rules = match kind { | |
1024 | DefKind::Macro(..) => match self.kind(child_index) { | |
1025 | EntryKind::MacroDef(_, macro_rules) => macro_rules, | |
1026 | _ => unreachable!(), | |
1027 | }, | |
1028 | _ => false, | |
1029 | }; | |
1030 | ||
1031 | callback(ModChild { ident, res, vis, span, macro_rules }); | |
1032 | ||
1033 | // For non-re-export structs and variants add their constructors to children. | |
1034 | // Re-export lists automatically contain constructors when necessary. | |
1035 | match kind { | |
1036 | DefKind::Struct => { | |
1037 | if let Some((ctor_def_id, ctor_kind)) = | |
1038 | self.get_ctor_def_id_and_kind(child_index) | |
1039 | { | |
dfeec247 | 1040 | let ctor_res = |
04454e1e FG |
1041 | Res::Def(DefKind::Ctor(CtorOf::Struct, ctor_kind), ctor_def_id); |
1042 | let vis = self.get_visibility(ctor_def_id.index); | |
5e7ed085 FG |
1043 | callback(ModChild { |
1044 | ident, | |
1045 | res: ctor_res, | |
1046 | vis, | |
1047 | span, | |
1048 | macro_rules: false, | |
1049 | }); | |
c30ab7b3 | 1050 | } |
c30ab7b3 | 1051 | } |
04454e1e FG |
1052 | DefKind::Variant => { |
1053 | // Braced variants, unlike structs, generate unusable names in | |
1054 | // value namespace, they are reserved for possible future use. | |
1055 | // It's ok to use the variant's id as a ctor id since an | |
1056 | // error will be reported on any use of such resolution anyway. | |
1057 | let (ctor_def_id, ctor_kind) = self | |
1058 | .get_ctor_def_id_and_kind(child_index) | |
1059 | .unwrap_or((def_id, CtorKind::Fictive)); | |
1060 | let ctor_res = | |
1061 | Res::Def(DefKind::Ctor(CtorOf::Variant, ctor_kind), ctor_def_id); | |
1062 | let mut vis = self.get_visibility(ctor_def_id.index); | |
1063 | if ctor_def_id == def_id && vis.is_public() { | |
1064 | // For non-exhaustive variants lower the constructor visibility to | |
1065 | // within the crate. We only need this for fictive constructors, | |
1066 | // for other constructors correct visibilities | |
1067 | // were already encoded in metadata. | |
1068 | let mut attrs = self.get_item_attrs(def_id.index, sess); | |
1069 | if attrs.any(|item| item.has_name(sym::non_exhaustive)) { | |
1070 | let crate_def_id = self.local_def_id(CRATE_DEF_INDEX); | |
1071 | vis = ty::Visibility::Restricted(crate_def_id); | |
1072 | } | |
1073 | } | |
1074 | callback(ModChild { ident, res: ctor_res, vis, span, macro_rules: false }); | |
1075 | } | |
1076 | _ => {} | |
d9579d0f AL |
1077 | } |
1078 | } | |
9e0c209e | 1079 | } |
7453a54e | 1080 | |
5099ac24 FG |
1081 | match self.kind(id) { |
1082 | EntryKind::Mod(exports) => { | |
1083 | for exp in exports.decode((self, sess)) { | |
1084 | callback(exp); | |
1085 | } | |
9e0c209e | 1086 | } |
5e7ed085 | 1087 | EntryKind::Enum | EntryKind::Trait => {} |
5099ac24 | 1088 | _ => bug!("`for_each_module_child` is called on a non-module: {:?}", self.def_kind(id)), |
9e0c209e SL |
1089 | } |
1090 | } | |
1a4d82fc | 1091 | |
5099ac24 | 1092 | fn is_ctfe_mir_available(self, id: DefIndex) -> bool { |
5869c6ff XL |
1093 | self.root.tables.mir_for_ctfe.get(self, id).is_some() |
1094 | } | |
1095 | ||
5099ac24 | 1096 | fn is_item_mir_available(self, id: DefIndex) -> bool { |
5e7ed085 | 1097 | self.root.tables.optimized_mir.get(self, id).is_some() |
9e0c209e | 1098 | } |
1a4d82fc | 1099 | |
5099ac24 | 1100 | fn module_expansion(self, id: DefIndex, sess: &Session) -> ExpnId { |
3c0e092e | 1101 | match self.kind(id) { |
5e7ed085 | 1102 | EntryKind::Mod(_) | EntryKind::Enum | EntryKind::Trait => { |
3c0e092e XL |
1103 | self.get_expn_that_defined(id, sess) |
1104 | } | |
1105 | _ => panic!("Expected module, found {:?}", self.local_def_id(id)), | |
3dfed10e XL |
1106 | } |
1107 | } | |
1108 | ||
5099ac24 | 1109 | fn get_fn_has_self_parameter(self, id: DefIndex) -> bool { |
a2a8927a XL |
1110 | match self.kind(id) { |
1111 | EntryKind::AssocFn(data) => data.decode(self).has_self, | |
1112 | _ => false, | |
1113 | } | |
1114 | } | |
1115 | ||
04454e1e FG |
1116 | fn get_associated_item_def_ids( |
1117 | self, | |
1118 | id: DefIndex, | |
1119 | sess: &'a Session, | |
1120 | ) -> impl Iterator<Item = DefId> + 'a { | |
1121 | self.root | |
1122 | .tables | |
1123 | .children | |
1124 | .get(self, id) | |
923072b8 | 1125 | .unwrap_or_else(LazyArray::empty) |
04454e1e FG |
1126 | .decode((self, sess)) |
1127 | .map(move |child_index| self.local_def_id(child_index)) | |
5099ac24 FG |
1128 | } |
1129 | ||
5e7ed085 | 1130 | fn get_associated_item(self, id: DefIndex) -> ty::AssocItem { |
8bb4bdeb XL |
1131 | let def_key = self.def_key(id); |
1132 | let parent = self.local_def_id(def_key.parent.unwrap()); | |
5e7ed085 | 1133 | let name = self.item_name(id); |
223e47cc | 1134 | |
e74abb32 | 1135 | let (kind, container, has_self) = match self.kind(id) { |
5e7ed085 | 1136 | EntryKind::AssocConst(container) => (ty::AssocKind::Const, container, false), |
ba9703b0 | 1137 | EntryKind::AssocFn(data) => { |
9e0c209e | 1138 | let data = data.decode(self); |
ba9703b0 | 1139 | (ty::AssocKind::Fn, data.container, data.has_self) |
9e0c209e | 1140 | } |
dfeec247 | 1141 | EntryKind::AssocType(container) => (ty::AssocKind::Type, container, false), |
dfeec247 | 1142 | _ => bug!("cannot get associated-item of `{:?}`", def_key), |
8bb4bdeb XL |
1143 | }; |
1144 | ||
dc9dc135 | 1145 | ty::AssocItem { |
5e7ed085 | 1146 | name, |
3b2f2976 | 1147 | kind, |
e74abb32 | 1148 | vis: self.get_visibility(id), |
8bb4bdeb XL |
1149 | defaultness: container.defaultness(), |
1150 | def_id: self.local_def_id(id), | |
5099ac24 | 1151 | trait_item_def_id: self.get_trait_item_def_id(id), |
8bb4bdeb | 1152 | container: container.with_def_id(parent), |
ba9703b0 | 1153 | fn_has_self_parameter: has_self, |
8bb4bdeb | 1154 | } |
9e0c209e | 1155 | } |
223e47cc | 1156 | |
5099ac24 | 1157 | fn get_ctor_def_id_and_kind(self, node_id: DefIndex) -> Option<(DefId, CtorKind)> { |
e74abb32 | 1158 | match self.kind(node_id) { |
5e7ed085 | 1159 | EntryKind::Struct(data) | EntryKind::Variant(data) => { |
a2a8927a XL |
1160 | let vdata = data.decode(self); |
1161 | vdata.ctor.map(|index| (self.local_def_id(index), vdata.ctor_kind)) | |
9e0c209e | 1162 | } |
c30ab7b3 | 1163 | _ => None, |
9e0c209e | 1164 | } |
223e47cc LB |
1165 | } |
1166 | ||
fc512014 | 1167 | fn get_item_attrs( |
5099ac24 | 1168 | self, |
a2a8927a | 1169 | id: DefIndex, |
fc512014 XL |
1170 | sess: &'a Session, |
1171 | ) -> impl Iterator<Item = ast::Attribute> + 'a { | |
ba9703b0 XL |
1172 | self.root |
1173 | .tables | |
1174 | .attributes | |
a2a8927a XL |
1175 | .get(self, id) |
1176 | .unwrap_or_else(|| { | |
1177 | // Structure and variant constructors don't have any attributes encoded for them, | |
1178 | // but we assume that someone passing a constructor ID actually wants to look at | |
1179 | // the attributes on the corresponding struct or variant. | |
1180 | let def_key = self.def_key(id); | |
1181 | assert_eq!(def_key.disambiguated_data.data, DefPathData::Ctor); | |
1182 | let parent_id = def_key.parent.expect("no parent for a constructor"); | |
1183 | self.root | |
1184 | .tables | |
1185 | .attributes | |
1186 | .get(self, parent_id) | |
1187 | .expect("no encoded attributes for a structure or variant") | |
1188 | }) | |
ba9703b0 | 1189 | .decode((self, sess)) |
9e0c209e | 1190 | } |
223e47cc | 1191 | |
5099ac24 FG |
1192 | fn get_struct_field_names( |
1193 | self, | |
1194 | id: DefIndex, | |
1195 | sess: &'a Session, | |
1196 | ) -> impl Iterator<Item = Spanned<Symbol>> + 'a { | |
dfeec247 | 1197 | self.root |
ba9703b0 | 1198 | .tables |
dfeec247 XL |
1199 | .children |
1200 | .get(self, id) | |
923072b8 | 1201 | .unwrap_or_else(LazyArray::empty) |
c30ab7b3 | 1202 | .decode(self) |
5e7ed085 | 1203 | .map(move |index| respan(self.get_span(index, sess), self.item_name(index))) |
9e0c209e | 1204 | } |
223e47cc | 1205 | |
5099ac24 | 1206 | fn get_struct_field_visibilities(self, id: DefIndex) -> impl Iterator<Item = Visibility> + 'a { |
17df50a5 XL |
1207 | self.root |
1208 | .tables | |
1209 | .children | |
1210 | .get(self, id) | |
923072b8 | 1211 | .unwrap_or_else(LazyArray::empty) |
17df50a5 | 1212 | .decode(self) |
5099ac24 | 1213 | .map(move |field_index| self.get_visibility(field_index)) |
17df50a5 XL |
1214 | } |
1215 | ||
60c5eb7d | 1216 | fn get_inherent_implementations_for_type( |
5099ac24 | 1217 | self, |
dc9dc135 XL |
1218 | tcx: TyCtxt<'tcx>, |
1219 | id: DefIndex, | |
1220 | ) -> &'tcx [DefId] { | |
e74abb32 | 1221 | tcx.arena.alloc_from_iter( |
dfeec247 | 1222 | self.root |
ba9703b0 | 1223 | .tables |
dfeec247 XL |
1224 | .inherent_impls |
1225 | .get(self, id) | |
923072b8 | 1226 | .unwrap_or_else(LazyArray::empty) |
e74abb32 | 1227 | .decode(self) |
dfeec247 | 1228 | .map(|index| self.local_def_id(index)), |
e74abb32 | 1229 | ) |
9e0c209e | 1230 | } |
223e47cc | 1231 | |
5099ac24 FG |
1232 | /// Decodes all inherent impls in the crate (for rustdoc). |
1233 | fn get_inherent_impls(self) -> impl Iterator<Item = (DefId, DefId)> + 'a { | |
1234 | (0..self.root.tables.inherent_impls.size()).flat_map(move |i| { | |
1235 | let ty_index = DefIndex::from_usize(i); | |
1236 | let ty_def_id = self.local_def_id(ty_index); | |
1237 | self.root | |
1238 | .tables | |
1239 | .inherent_impls | |
1240 | .get(self, ty_index) | |
923072b8 | 1241 | .unwrap_or_else(LazyArray::empty) |
5099ac24 FG |
1242 | .decode(self) |
1243 | .map(move |impl_index| (ty_def_id, self.local_def_id(impl_index))) | |
1244 | }) | |
a2a8927a XL |
1245 | } |
1246 | ||
5099ac24 FG |
1247 | /// Decodes all traits in the crate (for rustdoc and rustc diagnostics). |
1248 | fn get_traits(self) -> impl Iterator<Item = DefId> + 'a { | |
1249 | self.root.traits.decode(self).map(move |index| self.local_def_id(index)) | |
1250 | } | |
1251 | ||
1252 | /// Decodes all trait impls in the crate (for rustdoc). | |
1253 | fn get_trait_impls(self) -> impl Iterator<Item = (DefId, DefId, Option<SimplifiedType>)> + 'a { | |
5e7ed085 | 1254 | self.cdata.trait_impls.iter().flat_map(move |(&(trait_cnum_raw, trait_index), impls)| { |
5099ac24 | 1255 | let trait_def_id = DefId { |
5e7ed085 FG |
1256 | krate: self.cnum_map[CrateNum::from_u32(trait_cnum_raw)], |
1257 | index: trait_index, | |
5099ac24 FG |
1258 | }; |
1259 | impls.decode(self).map(move |(impl_index, simplified_self_ty)| { | |
1260 | (trait_def_id, self.local_def_id(impl_index), simplified_self_ty) | |
1261 | }) | |
a2a8927a XL |
1262 | }) |
1263 | } | |
1264 | ||
5e7ed085 FG |
1265 | fn get_all_incoherent_impls(self) -> impl Iterator<Item = DefId> + 'a { |
1266 | self.cdata | |
1267 | .incoherent_impls | |
1268 | .values() | |
1269 | .flat_map(move |impls| impls.decode(self).map(move |idx| self.local_def_id(idx))) | |
1270 | } | |
1271 | ||
1272 | fn get_incoherent_impls(self, tcx: TyCtxt<'tcx>, simp: SimplifiedType) -> &'tcx [DefId] { | |
1273 | if let Some(impls) = self.cdata.incoherent_impls.get(&simp) { | |
1274 | tcx.arena.alloc_from_iter(impls.decode(self).map(|idx| self.local_def_id(idx))) | |
1275 | } else { | |
1276 | &[] | |
1277 | } | |
1278 | } | |
1279 | ||
a2a8927a | 1280 | fn get_implementations_of_trait( |
5099ac24 | 1281 | self, |
dc9dc135 | 1282 | tcx: TyCtxt<'tcx>, |
a2a8927a XL |
1283 | trait_def_id: DefId, |
1284 | ) -> &'tcx [(DefId, Option<SimplifiedType>)] { | |
5099ac24 | 1285 | if self.trait_impls.is_empty() { |
dfeec247 | 1286 | return &[]; |
b7449926 XL |
1287 | } |
1288 | ||
a2a8927a XL |
1289 | // Do a reverse lookup beforehand to avoid touching the crate_num |
1290 | // hash map in the loop below. | |
1291 | let key = match self.reverse_translate_def_id(trait_def_id) { | |
1292 | Some(def_id) => (def_id.krate.as_u32(), def_id.index), | |
1293 | None => return &[], | |
1294 | }; | |
223e47cc | 1295 | |
a2a8927a XL |
1296 | if let Some(impls) = self.trait_impls.get(&key) { |
1297 | tcx.arena.alloc_from_iter( | |
3dfed10e XL |
1298 | impls |
1299 | .decode(self) | |
a2a8927a XL |
1300 | .map(|(idx, simplified_self_ty)| (self.local_def_id(idx), simplified_self_ty)), |
1301 | ) | |
1302 | } else { | |
1303 | &[] | |
9e0c209e SL |
1304 | } |
1305 | } | |
223e47cc | 1306 | |
5099ac24 | 1307 | fn get_trait_of_item(self, id: DefIndex) -> Option<DefId> { |
83c7162d XL |
1308 | let def_key = self.def_key(id); |
1309 | match def_key.disambiguated_data.data { | |
1310 | DefPathData::TypeNs(..) | DefPathData::ValueNs(..) => (), | |
1311 | // Not an associated item | |
1312 | _ => return None, | |
1313 | } | |
dfeec247 | 1314 | def_key.parent.and_then(|parent_index| match self.kind(parent_index) { |
5e7ed085 | 1315 | EntryKind::Trait | EntryKind::TraitAlias => Some(self.local_def_id(parent_index)), |
dfeec247 | 1316 | _ => None, |
9e0c209e SL |
1317 | }) |
1318 | } | |
223e47cc | 1319 | |
5099ac24 FG |
1320 | fn get_native_libraries(self, sess: &'a Session) -> impl Iterator<Item = NativeLib> + 'a { |
1321 | self.root.native_libraries.decode((self, sess)) | |
223e47cc LB |
1322 | } |
1323 | ||
5099ac24 | 1324 | fn get_proc_macro_quoted_span(self, index: usize, sess: &Session) -> Span { |
17df50a5 XL |
1325 | self.root |
1326 | .tables | |
1327 | .proc_macro_quoted_spans | |
1328 | .get(self, index) | |
1329 | .unwrap_or_else(|| panic!("Missing proc macro quoted span: {:?}", index)) | |
1330 | .decode((self, sess)) | |
1331 | } | |
1332 | ||
5099ac24 FG |
1333 | fn get_foreign_modules(self, sess: &'a Session) -> impl Iterator<Item = ForeignModule> + '_ { |
1334 | self.root.foreign_modules.decode((self, sess)) | |
0531ce1d XL |
1335 | } |
1336 | ||
60c5eb7d | 1337 | fn get_dylib_dependency_formats( |
5099ac24 | 1338 | self, |
dc9dc135 XL |
1339 | tcx: TyCtxt<'tcx>, |
1340 | ) -> &'tcx [(CrateNum, LinkagePreference)] { | |
dfeec247 XL |
1341 | tcx.arena.alloc_from_iter( |
1342 | self.root.dylib_dependency_formats.decode(self).enumerate().flat_map(|(i, link)| { | |
c30ab7b3 | 1343 | let cnum = CrateNum::new(i + 1); |
94b46f34 | 1344 | link.map(|link| (self.cnum_map[cnum], link)) |
dfeec247 XL |
1345 | }), |
1346 | ) | |
223e47cc | 1347 | } |
223e47cc | 1348 | |
5099ac24 FG |
1349 | fn get_missing_lang_items(self, tcx: TyCtxt<'tcx>) -> &'tcx [lang_items::LangItem] { |
1350 | tcx.arena.alloc_from_iter(self.root.lang_items_missing.decode(self)) | |
d9579d0f AL |
1351 | } |
1352 | ||
60c5eb7d | 1353 | fn exported_symbols( |
5099ac24 | 1354 | self, |
dc9dc135 | 1355 | tcx: TyCtxt<'tcx>, |
04454e1e | 1356 | ) -> &'tcx [(ExportedSymbol<'tcx>, SymbolExportInfo)] { |
5099ac24 | 1357 | tcx.arena.alloc_from_iter(self.root.exported_symbols.decode((self, tcx))) |
83c7162d XL |
1358 | } |
1359 | ||
5e7ed085 | 1360 | fn get_macro(self, id: DefIndex, sess: &Session) -> ast::MacroDef { |
e74abb32 | 1361 | match self.kind(id) { |
5e7ed085 FG |
1362 | EntryKind::MacroDef(mac_args, macro_rules) => { |
1363 | ast::MacroDef { body: P(mac_args.decode((self, sess))), macro_rules } | |
1364 | } | |
476ff2be SL |
1365 | _ => bug!(), |
1366 | } | |
9e0c209e | 1367 | } |
9cc50fc6 | 1368 | |
5099ac24 | 1369 | fn is_foreign_item(self, id: DefIndex) -> bool { |
e74abb32 | 1370 | match self.kind(id) { |
5e7ed085 | 1371 | EntryKind::ForeignStatic | EntryKind::ForeignFn => true, |
c30ab7b3 | 1372 | _ => false, |
62682a34 | 1373 | } |
d9579d0f | 1374 | } |
1a4d82fc | 1375 | |
cc61c64b | 1376 | #[inline] |
5099ac24 | 1377 | fn def_key(self, index: DefIndex) -> DefKey { |
fc512014 XL |
1378 | *self |
1379 | .def_key_cache | |
1380 | .lock() | |
1381 | .entry(index) | |
1382 | .or_insert_with(|| self.root.tables.def_keys.get(self, index).unwrap().decode(self)) | |
1383 | } | |
1384 | ||
32a655c1 | 1385 | // Returns the path leading to the thing with this `id`. |
5099ac24 | 1386 | fn def_path(self, id: DefIndex) -> DefPath { |
b7449926 | 1387 | debug!("def_path(cnum={:?}, id={:?})", self.cnum, id); |
e1599b0c | 1388 | DefPath::make(self.cnum, id, |parent| self.def_key(parent)) |
92a42be0 | 1389 | } |
92a42be0 | 1390 | |
3dfed10e | 1391 | fn def_path_hash_unlocked( |
5099ac24 | 1392 | self, |
3dfed10e XL |
1393 | index: DefIndex, |
1394 | def_path_hashes: &mut FxHashMap<DefIndex, DefPathHash>, | |
1395 | ) -> DefPathHash { | |
04454e1e FG |
1396 | *def_path_hashes |
1397 | .entry(index) | |
1398 | .or_insert_with(|| self.root.tables.def_path_hashes.get(self, index).unwrap()) | |
3dfed10e XL |
1399 | } |
1400 | ||
1401 | #[inline] | |
5099ac24 | 1402 | fn def_path_hash(self, index: DefIndex) -> DefPathHash { |
3dfed10e XL |
1403 | let mut def_path_hashes = self.def_path_hash_cache.lock(); |
1404 | self.def_path_hash_unlocked(index, &mut def_path_hashes) | |
1405 | } | |
1406 | ||
c295e0f8 | 1407 | #[inline] |
5099ac24 | 1408 | fn def_path_hash_to_def_index(self, hash: DefPathHash) -> DefIndex { |
c295e0f8 XL |
1409 | self.def_path_hash_map.def_path_hash_to_def_index(&hash) |
1410 | } | |
1411 | ||
5099ac24 | 1412 | fn expn_hash_to_expn_id(self, sess: &Session, index_guess: u32, hash: ExpnHash) -> ExpnId { |
136023e0 XL |
1413 | debug_assert_eq!(ExpnId::from_hash(hash), None); |
1414 | let index_guess = ExpnIndex::from_u32(index_guess); | |
1415 | let old_hash = self.root.expn_hashes.get(self, index_guess).map(|lazy| lazy.decode(self)); | |
1416 | ||
1417 | let index = if old_hash == Some(hash) { | |
1418 | // Fast path: the expn and its index is unchanged from the | |
1419 | // previous compilation session. There is no need to decode anything | |
1420 | // else. | |
1421 | index_guess | |
1422 | } else { | |
1423 | // Slow path: We need to find out the new `DefIndex` of the provided | |
1424 | // `DefPathHash`, if its still exists. This requires decoding every `DefPathHash` | |
1425 | // stored in this crate. | |
1426 | let map = self.cdata.expn_hash_map.get_or_init(|| { | |
1427 | let end_id = self.root.expn_hashes.size() as u32; | |
1428 | let mut map = | |
1429 | UnhashMap::with_capacity_and_hasher(end_id as usize, Default::default()); | |
1430 | for i in 0..end_id { | |
1431 | let i = ExpnIndex::from_u32(i); | |
1432 | if let Some(hash) = self.root.expn_hashes.get(self, i) { | |
1433 | map.insert(hash.decode(self), i); | |
136023e0 XL |
1434 | } |
1435 | } | |
1436 | map | |
1437 | }); | |
1438 | map[&hash] | |
1439 | }; | |
1440 | ||
c295e0f8 | 1441 | let data = self.root.expn_data.get(self, index).unwrap().decode((self, sess)); |
136023e0 XL |
1442 | rustc_span::hygiene::register_expn_id(self.cnum, index, data, hash) |
1443 | } | |
1444 | ||
b7449926 | 1445 | /// Imports the source_map from an external crate into the source_map of the crate |
9e0c209e SL |
1446 | /// currently being compiled (the "local crate"). |
1447 | /// | |
1448 | /// The import algorithm works analogous to how AST items are inlined from an | |
1449 | /// external crate's metadata: | |
b7449926 XL |
1450 | /// For every SourceFile in the external source_map an 'inline' copy is created in the |
1451 | /// local source_map. The correspondence relation between external and local | |
1452 | /// SourceFiles is recorded in the `ImportedSourceFile` objects returned from this | |
9e0c209e SL |
1453 | /// function. When an item from an external crate is later inlined into this |
1454 | /// crate, this correspondence information is used to translate the span | |
1455 | /// information of the inlined item so that it refers the correct positions in | |
b7449926 | 1456 | /// the local source_map (see `<decoder::DecodeContext as SpecializedDecoder<Span>>`). |
9e0c209e | 1457 | /// |
b7449926 XL |
1458 | /// The import algorithm in the function below will reuse SourceFiles already |
1459 | /// existing in the local source_map. For example, even if the SourceFile of some | |
9e0c209e | 1460 | /// source file of libstd gets imported many times, there will only ever be |
b7449926 | 1461 | /// one SourceFile object for the corresponding file in the local source_map. |
9e0c209e | 1462 | /// |
b7449926 | 1463 | /// Note that imported SourceFiles do not actually contain the source code of the |
9e0c209e SL |
1464 | /// file they represent, just information about length, line breaks, and |
1465 | /// multibyte characters. This information is enough to generate valid debuginfo | |
1466 | /// for items inlined from other crates. | |
b7449926 XL |
1467 | /// |
1468 | /// Proc macro crates don't currently export spans, so this function does not have | |
1469 | /// to work for them. | |
5099ac24 | 1470 | fn imported_source_files(self, sess: &Session) -> &'a [ImportedSourceFile] { |
ba9703b0 XL |
1471 | // Translate the virtual `/rustc/$hash` prefix back to a real directory |
1472 | // that should hold actual sources, where possible. | |
3dfed10e XL |
1473 | // |
1474 | // NOTE: if you update this, you might need to also update bootstrap's code for generating | |
1475 | // the `rust-src` component in `Src::run` in `src/bootstrap/dist.rs`. | |
ba9703b0 XL |
1476 | let virtual_rust_source_base_dir = option_env!("CFG_VIRTUAL_RUST_SOURCE_BASE_DIR") |
1477 | .map(Path::new) | |
1478 | .filter(|_| { | |
1479 | // Only spend time on further checks if we have what to translate *to*. | |
cdc7bbd5 | 1480 | sess.opts.real_rust_source_base_dir.is_some() |
923072b8 FG |
1481 | // Some tests need the translation to be always skipped. |
1482 | && sess.opts.debugging_opts.translate_remapped_path_to_local_path | |
ba9703b0 XL |
1483 | }) |
1484 | .filter(|virtual_dir| { | |
1485 | // Don't translate away `/rustc/$hash` if we're still remapping to it, | |
1486 | // since that means we're still building `std`/`rustc` that need it, | |
1487 | // and we don't want the real path to leak into codegen/debuginfo. | |
1488 | !sess.opts.remap_path_prefix.iter().any(|(_from, to)| to == virtual_dir) | |
1489 | }); | |
1490 | let try_to_translate_virtual_to_real = |name: &mut rustc_span::FileName| { | |
1491 | debug!( | |
1492 | "try_to_translate_virtual_to_real(name={:?}): \ | |
1493 | virtual_rust_source_base_dir={:?}, real_rust_source_base_dir={:?}", | |
cdc7bbd5 | 1494 | name, virtual_rust_source_base_dir, sess.opts.real_rust_source_base_dir, |
ba9703b0 XL |
1495 | ); |
1496 | ||
1497 | if let Some(virtual_dir) = virtual_rust_source_base_dir { | |
cdc7bbd5 | 1498 | if let Some(real_dir) = &sess.opts.real_rust_source_base_dir { |
ba9703b0 | 1499 | if let rustc_span::FileName::Real(old_name) = name { |
17df50a5 XL |
1500 | if let rustc_span::RealFileName::Remapped { local_path: _, virtual_name } = |
1501 | old_name | |
1502 | { | |
1503 | if let Ok(rest) = virtual_name.strip_prefix(virtual_dir) { | |
1504 | let virtual_name = virtual_name.clone(); | |
3dfed10e XL |
1505 | |
1506 | // The std library crates are in | |
1507 | // `$sysroot/lib/rustlib/src/rust/library`, whereas other crates | |
1508 | // may be in `$sysroot/lib/rustlib/src/rust/` directly. So we | |
1509 | // detect crates from the std libs and handle them specially. | |
1510 | const STD_LIBS: &[&str] = &[ | |
1511 | "core", | |
1512 | "alloc", | |
1513 | "std", | |
1514 | "test", | |
1515 | "term", | |
1516 | "unwind", | |
1517 | "proc_macro", | |
1518 | "panic_abort", | |
1519 | "panic_unwind", | |
1520 | "profiler_builtins", | |
1521 | "rtstartup", | |
1522 | "rustc-std-workspace-core", | |
1523 | "rustc-std-workspace-alloc", | |
1524 | "rustc-std-workspace-std", | |
1525 | "backtrace", | |
1526 | ]; | |
1527 | let is_std_lib = STD_LIBS.iter().any(|l| rest.starts_with(l)); | |
1528 | ||
1529 | let new_path = if is_std_lib { | |
1530 | real_dir.join("library").join(rest) | |
1531 | } else { | |
1532 | real_dir.join(rest) | |
1533 | }; | |
1534 | ||
ba9703b0 XL |
1535 | debug!( |
1536 | "try_to_translate_virtual_to_real: `{}` -> `{}`", | |
1537 | virtual_name.display(), | |
1538 | new_path.display(), | |
1539 | ); | |
17df50a5 XL |
1540 | let new_name = rustc_span::RealFileName::Remapped { |
1541 | local_path: Some(new_path), | |
ba9703b0 XL |
1542 | virtual_name, |
1543 | }; | |
1544 | *old_name = new_name; | |
1545 | } | |
1546 | } | |
1547 | } | |
1548 | } | |
1549 | } | |
1550 | }; | |
1551 | ||
f9f354fc | 1552 | self.cdata.source_map_import_info.get_or_init(|| { |
e74abb32 XL |
1553 | let external_source_map = self.root.source_map.decode(self); |
1554 | ||
dfeec247 XL |
1555 | external_source_map |
1556 | .map(|source_file_to_import| { | |
1557 | // We can't reuse an existing SourceFile, so allocate a new one | |
1558 | // containing the information we need. | |
1559 | let rustc_span::SourceFile { | |
ba9703b0 | 1560 | mut name, |
dfeec247 XL |
1561 | src_hash, |
1562 | start_pos, | |
1563 | end_pos, | |
923072b8 FG |
1564 | lines, |
1565 | multibyte_chars, | |
1566 | non_narrow_chars, | |
1567 | normalized_pos, | |
dfeec247 XL |
1568 | name_hash, |
1569 | .. | |
1570 | } = source_file_to_import; | |
1571 | ||
17df50a5 XL |
1572 | // If this file is under $sysroot/lib/rustlib/src/ but has not been remapped |
1573 | // during rust bootstrapping by `remap-debuginfo = true`, and the user | |
1574 | // wish to simulate that behaviour by -Z simulate-remapped-rust-src-base, | |
1575 | // then we change `name` to a similar state as if the rust was bootstrapped | |
1576 | // with `remap-debuginfo = true`. | |
1577 | // This is useful for testing so that tests about the effects of | |
1578 | // `try_to_translate_virtual_to_real` don't have to worry about how the | |
1579 | // compiler is bootstrapped. | |
1580 | if let Some(virtual_dir) = | |
1581 | &sess.opts.debugging_opts.simulate_remapped_rust_src_base | |
1582 | { | |
1583 | if let Some(real_dir) = &sess.opts.real_rust_source_base_dir { | |
1584 | if let rustc_span::FileName::Real(ref mut old_name) = name { | |
1585 | if let rustc_span::RealFileName::LocalPath(local) = old_name { | |
1586 | if let Ok(rest) = local.strip_prefix(real_dir) { | |
1587 | *old_name = rustc_span::RealFileName::Remapped { | |
1588 | local_path: None, | |
1589 | virtual_name: virtual_dir.join(rest), | |
1590 | }; | |
1591 | } | |
1592 | } | |
1593 | } | |
1594 | } | |
1595 | } | |
1596 | ||
ba9703b0 XL |
1597 | // If this file's path has been remapped to `/rustc/$hash`, |
1598 | // we might be able to reverse that (also see comments above, | |
1599 | // on `try_to_translate_virtual_to_real`). | |
ba9703b0 XL |
1600 | try_to_translate_virtual_to_real(&mut name); |
1601 | ||
dfeec247 XL |
1602 | let source_length = (end_pos - start_pos).to_usize(); |
1603 | ||
ba9703b0 | 1604 | let local_version = sess.source_map().new_imported_source_file( |
dfeec247 | 1605 | name, |
dfeec247 XL |
1606 | src_hash, |
1607 | name_hash, | |
1608 | source_length, | |
ba9703b0 | 1609 | self.cnum, |
dfeec247 XL |
1610 | lines, |
1611 | multibyte_chars, | |
1612 | non_narrow_chars, | |
1613 | normalized_pos, | |
ba9703b0 XL |
1614 | start_pos, |
1615 | end_pos, | |
dfeec247 XL |
1616 | ); |
1617 | debug!( | |
1618 | "CrateMetaData::imported_source_files alloc \ | |
74b04a01 XL |
1619 | source_file {:?} original (start_pos {:?} end_pos {:?}) \ |
1620 | translated (start_pos {:?} end_pos {:?})", | |
dfeec247 XL |
1621 | local_version.name, |
1622 | start_pos, | |
1623 | end_pos, | |
1624 | local_version.start_pos, | |
1625 | local_version.end_pos | |
1626 | ); | |
e74abb32 | 1627 | |
dfeec247 XL |
1628 | ImportedSourceFile { |
1629 | original_start_pos: start_pos, | |
1630 | original_end_pos: end_pos, | |
1631 | translated_source_file: local_version, | |
1632 | } | |
1633 | }) | |
1634 | .collect() | |
e74abb32 XL |
1635 | }) |
1636 | } | |
04454e1e FG |
1637 | |
1638 | fn get_generator_diagnostic_data( | |
1639 | self, | |
1640 | tcx: TyCtxt<'tcx>, | |
1641 | id: DefIndex, | |
1642 | ) -> Option<GeneratorDiagnosticData<'tcx>> { | |
1643 | self.root | |
1644 | .tables | |
1645 | .generator_diagnostic_data | |
1646 | .get(self, id) | |
1647 | .map(|param| param.decode((self, tcx))) | |
1648 | .map(|generator_data| GeneratorDiagnosticData { | |
1649 | generator_interior_types: generator_data.generator_interior_types, | |
1650 | hir_owner: generator_data.hir_owner, | |
1651 | nodes_types: generator_data.nodes_types, | |
1652 | adjustments: generator_data.adjustments, | |
1653 | }) | |
1654 | } | |
1655 | ||
1656 | fn get_may_have_doc_links(self, index: DefIndex) -> bool { | |
1657 | self.root.tables.may_have_doc_links.get(self, index).is_some() | |
1658 | } | |
923072b8 FG |
1659 | |
1660 | fn get_is_intrinsic(self, index: DefIndex) -> bool { | |
1661 | self.root.tables.is_intrinsic.get(self, index).is_some() | |
1662 | } | |
74b04a01 | 1663 | } |
0531ce1d | 1664 | |
74b04a01 | 1665 | impl CrateMetadata { |
923072b8 | 1666 | pub(crate) fn new( |
74b04a01 | 1667 | sess: &Session, |
04454e1e | 1668 | cstore: &CStore, |
74b04a01 | 1669 | blob: MetadataBlob, |
923072b8 | 1670 | root: CrateRoot, |
74b04a01 XL |
1671 | raw_proc_macros: Option<&'static [ProcMacro]>, |
1672 | cnum: CrateNum, | |
1673 | cnum_map: CrateNumMap, | |
3dfed10e | 1674 | dep_kind: CrateDepKind, |
74b04a01 XL |
1675 | source: CrateSource, |
1676 | private_dep: bool, | |
1677 | host_hash: Option<Svh>, | |
1678 | ) -> CrateMetadata { | |
74b04a01 XL |
1679 | let trait_impls = root |
1680 | .impls | |
1681 | .decode((&blob, sess)) | |
1682 | .map(|trait_impls| (trait_impls.trait_id, trait_impls.impls)) | |
1683 | .collect(); | |
1684 | let alloc_decoding_state = | |
1685 | AllocDecodingState::new(root.interpret_alloc_index.decode(&blob).collect()); | |
1686 | let dependencies = Lock::new(cnum_map.iter().cloned().collect()); | |
c295e0f8 XL |
1687 | |
1688 | // Pre-decode the DefPathHash->DefIndex table. This is a cheap operation | |
1689 | // that does not copy any data. It just does some data verification. | |
1690 | let def_path_hash_map = root.def_path_hash_map.decode(&blob); | |
1691 | ||
04454e1e | 1692 | let mut cdata = CrateMetadata { |
74b04a01 XL |
1693 | blob, |
1694 | root, | |
74b04a01 | 1695 | trait_impls, |
04454e1e | 1696 | incoherent_impls: Default::default(), |
74b04a01 | 1697 | raw_proc_macros, |
f9f354fc | 1698 | source_map_import_info: OnceCell::new(), |
c295e0f8 | 1699 | def_path_hash_map, |
136023e0 | 1700 | expn_hash_map: Default::default(), |
74b04a01 | 1701 | alloc_decoding_state, |
74b04a01 XL |
1702 | cnum, |
1703 | cnum_map, | |
1704 | dependencies, | |
1705 | dep_kind: Lock::new(dep_kind), | |
5099ac24 | 1706 | source: Lrc::new(source), |
74b04a01 XL |
1707 | private_dep, |
1708 | host_hash, | |
1709 | extern_crate: Lock::new(None), | |
3dfed10e XL |
1710 | hygiene_context: Default::default(), |
1711 | def_key_cache: Default::default(), | |
1712 | def_path_hash_cache: Default::default(), | |
04454e1e FG |
1713 | }; |
1714 | ||
1715 | // Need `CrateMetadataRef` to decode `DefId`s in simplified types. | |
1716 | cdata.incoherent_impls = cdata | |
1717 | .root | |
1718 | .incoherent_impls | |
1719 | .decode(CrateMetadataRef { cdata: &cdata, cstore }) | |
1720 | .map(|incoherent_impls| (incoherent_impls.self_ty, incoherent_impls.impls)) | |
1721 | .collect(); | |
1722 | ||
1723 | cdata | |
b039eaaf | 1724 | } |
60c5eb7d | 1725 | |
923072b8 | 1726 | pub(crate) fn dependencies(&self) -> LockGuard<'_, Vec<CrateNum>> { |
60c5eb7d XL |
1727 | self.dependencies.borrow() |
1728 | } | |
1729 | ||
923072b8 | 1730 | pub(crate) fn add_dependency(&self, cnum: CrateNum) { |
60c5eb7d XL |
1731 | self.dependencies.borrow_mut().push(cnum); |
1732 | } | |
1733 | ||
923072b8 | 1734 | pub(crate) fn update_extern_crate(&self, new_extern_crate: ExternCrate) -> bool { |
60c5eb7d XL |
1735 | let mut extern_crate = self.extern_crate.borrow_mut(); |
1736 | let update = Some(new_extern_crate.rank()) > extern_crate.as_ref().map(ExternCrate::rank); | |
1737 | if update { | |
1738 | *extern_crate = Some(new_extern_crate); | |
1739 | } | |
1740 | update | |
1741 | } | |
1742 | ||
923072b8 | 1743 | pub(crate) fn source(&self) -> &CrateSource { |
5099ac24 | 1744 | &*self.source |
60c5eb7d XL |
1745 | } |
1746 | ||
923072b8 | 1747 | pub(crate) fn dep_kind(&self) -> CrateDepKind { |
60c5eb7d XL |
1748 | *self.dep_kind.lock() |
1749 | } | |
1750 | ||
923072b8 | 1751 | pub(crate) fn update_dep_kind(&self, f: impl FnOnce(CrateDepKind) -> CrateDepKind) { |
60c5eb7d XL |
1752 | self.dep_kind.with_lock(|dep_kind| *dep_kind = f(*dep_kind)) |
1753 | } | |
1754 | ||
923072b8 | 1755 | pub(crate) fn panic_strategy(&self) -> PanicStrategy { |
60c5eb7d XL |
1756 | self.root.panic_strategy |
1757 | } | |
1758 | ||
923072b8 | 1759 | pub(crate) fn needs_panic_runtime(&self) -> bool { |
60c5eb7d XL |
1760 | self.root.needs_panic_runtime |
1761 | } | |
1762 | ||
923072b8 | 1763 | pub(crate) fn is_panic_runtime(&self) -> bool { |
60c5eb7d XL |
1764 | self.root.panic_runtime |
1765 | } | |
1766 | ||
923072b8 | 1767 | pub(crate) fn is_profiler_runtime(&self) -> bool { |
60c5eb7d XL |
1768 | self.root.profiler_runtime |
1769 | } | |
1770 | ||
923072b8 | 1771 | pub(crate) fn needs_allocator(&self) -> bool { |
60c5eb7d XL |
1772 | self.root.needs_allocator |
1773 | } | |
1774 | ||
923072b8 | 1775 | pub(crate) fn has_global_allocator(&self) -> bool { |
60c5eb7d XL |
1776 | self.root.has_global_allocator |
1777 | } | |
1778 | ||
923072b8 | 1779 | pub(crate) fn has_default_lib_allocator(&self) -> bool { |
60c5eb7d XL |
1780 | self.root.has_default_lib_allocator |
1781 | } | |
1782 | ||
923072b8 | 1783 | pub(crate) fn is_proc_macro_crate(&self) -> bool { |
60c5eb7d XL |
1784 | self.root.is_proc_macro_crate() |
1785 | } | |
1786 | ||
923072b8 | 1787 | pub(crate) fn name(&self) -> Symbol { |
60c5eb7d XL |
1788 | self.root.name |
1789 | } | |
1790 | ||
923072b8 | 1791 | pub(crate) fn stable_crate_id(&self) -> StableCrateId { |
136023e0 | 1792 | self.root.stable_crate_id |
60c5eb7d XL |
1793 | } |
1794 | ||
923072b8 | 1795 | pub(crate) fn hash(&self) -> Svh { |
60c5eb7d XL |
1796 | self.root.hash |
1797 | } | |
74b04a01 | 1798 | |
3dfed10e XL |
1799 | fn num_def_ids(&self) -> usize { |
1800 | self.root.tables.def_keys.size() | |
1801 | } | |
1802 | ||
74b04a01 XL |
1803 | fn local_def_id(&self, index: DefIndex) -> DefId { |
1804 | DefId { krate: self.cnum, index } | |
1805 | } | |
1806 | ||
1807 | // Translate a DefId from the current compilation environment to a DefId | |
1808 | // for an external crate. | |
1809 | fn reverse_translate_def_id(&self, did: DefId) -> Option<DefId> { | |
1810 | for (local, &global) in self.cnum_map.iter_enumerated() { | |
1811 | if global == did.krate { | |
1812 | return Some(DefId { krate: local, index: did.index }); | |
1813 | } | |
1814 | } | |
1815 | ||
1816 | None | |
1817 | } | |
a7813a04 | 1818 | } |
e1599b0c XL |
1819 | |
1820 | // Cannot be implemented on 'ProcMacro', as libproc_macro | |
74b04a01 | 1821 | // does not depend on librustc_ast |
e1599b0c XL |
1822 | fn macro_kind(raw: &ProcMacro) -> MacroKind { |
1823 | match raw { | |
1824 | ProcMacro::CustomDerive { .. } => MacroKind::Derive, | |
1825 | ProcMacro::Attr { .. } => MacroKind::Attr, | |
dfeec247 | 1826 | ProcMacro::Bang { .. } => MacroKind::Bang, |
e1599b0c XL |
1827 | } |
1828 | } |