]>
Commit | Line | Data |
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223e47cc LB |
1 | // Decoding metadata from a single crate's metadata |
2 | ||
4b012472 | 3 | use crate::creader::CStore; |
353b0b11 | 4 | use crate::rmeta::table::IsDefault; |
dfeec247 | 5 | use crate::rmeta::*; |
9e0c209e | 6 | |
3dfed10e | 7 | use rustc_ast as ast; |
dfeec247 | 8 | use rustc_data_structures::captures::Captures; |
c0240ec0 | 9 | use rustc_data_structures::fingerprint::Fingerprint; |
49aad941 | 10 | use rustc_data_structures::owned_slice::OwnedSlice; |
c0240ec0 | 11 | use rustc_data_structures::sync::{Lock, Lrc, OnceLock}; |
5869c6ff | 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}; |
4b012472 | 15 | use rustc_hir::def::Res; |
c620b35d | 16 | use rustc_hir::def_id::{CRATE_DEF_INDEX, LOCAL_CRATE}; |
4b012472 | 17 | use rustc_hir::definitions::{DefPath, DefPathData}; |
c295e0f8 | 18 | use rustc_hir::diagnostic_items::DiagnosticItems; |
4b012472 FG |
19 | use rustc_index::Idx; |
20 | use rustc_middle::middle::lib_features::LibFeatures; | |
ba9703b0 | 21 | use rustc_middle::mir::interpret::{AllocDecodingSession, AllocDecodingState}; |
ba9703b0 | 22 | use rustc_middle::ty::codec::TyDecoder; |
4b012472 | 23 | use rustc_middle::ty::Visibility; |
923072b8 FG |
24 | use rustc_serialize::opaque::MemDecoder; |
25 | use rustc_serialize::{Decodable, Decoder}; | |
4b012472 | 26 | use rustc_session::cstore::{CrateSource, ExternCrate}; |
ba9703b0 | 27 | use rustc_session::Session; |
4b012472 | 28 | use rustc_span::symbol::kw; |
c0240ec0 | 29 | use rustc_span::{BytePos, Pos, SpanData, SpanDecoder, SyntaxContext, DUMMY_SP}; |
9cc50fc6 | 30 | |
ba9703b0 | 31 | use proc_macro::bridge::client::ProcMacro; |
923072b8 | 32 | use std::iter::TrustedLen; |
ba9703b0 | 33 | use std::path::Path; |
487cf647 | 34 | use std::{io, iter, mem}; |
223e47cc | 35 | |
a2a8927a | 36 | pub(super) use cstore_impl::provide; |
3dfed10e | 37 | use rustc_span::hygiene::HygieneDecodeContext; |
60c5eb7d XL |
38 | |
39 | mod cstore_impl; | |
40 | ||
c295e0f8 XL |
41 | /// A reference to the raw binary version of crate metadata. |
42 | /// A `MetadataBlob` internally is just a reference counted pointer to | |
43 | /// the actual data, so cloning it is cheap. | |
44 | #[derive(Clone)] | |
49aad941 | 45 | pub(crate) struct MetadataBlob(pub(crate) OwnedSlice); |
c295e0f8 | 46 | |
c295e0f8 XL |
47 | impl std::ops::Deref for MetadataBlob { |
48 | type Target = [u8]; | |
49 | ||
50 | #[inline] | |
51 | fn deref(&self) -> &[u8] { | |
52 | &self.0[..] | |
53 | } | |
54 | } | |
60c5eb7d | 55 | |
487cf647 FG |
56 | /// A map from external crate numbers (as decoded from some crate file) to |
57 | /// local crate numbers (as generated during this session). Each external | |
58 | /// crate may refer to types in other external crates, and each has their | |
59 | /// own crate numbers. | |
923072b8 | 60 | pub(crate) type CrateNumMap = IndexVec<CrateNum, CrateNum>; |
60c5eb7d | 61 | |
923072b8 | 62 | pub(crate) struct CrateMetadata { |
60c5eb7d XL |
63 | /// The primary crate data - binary metadata blob. |
64 | blob: MetadataBlob, | |
65 | ||
66 | // --- Some data pre-decoded from the metadata blob, usually for performance --- | |
fe692bf9 | 67 | /// Data about the top-level items in a crate, as well as various crate-level metadata. |
923072b8 | 68 | root: CrateRoot, |
60c5eb7d XL |
69 | /// Trait impl data. |
70 | /// FIXME: Used only from queries and can use query cache, | |
71 | /// so pre-decoding can probably be avoided. | |
923072b8 | 72 | trait_impls: FxHashMap<(u32, DefIndex), LazyArray<(DefIndex, Option<SimplifiedType>)>>, |
5e7ed085 FG |
73 | /// Inherent impls which do not follow the normal coherence rules. |
74 | /// | |
75 | /// These can be introduced using either `#![rustc_coherence_is_core]` | |
76 | /// or `#[rustc_allow_incoherent_impl]`. | |
923072b8 | 77 | incoherent_impls: FxHashMap<SimplifiedType, LazyArray<DefIndex>>, |
60c5eb7d XL |
78 | /// Proc macro descriptions for this crate, if it's a proc macro crate. |
79 | raw_proc_macros: Option<&'static [ProcMacro]>, | |
80 | /// Source maps for code from the crate. | |
f2b60f7d | 81 | source_map_import_info: Lock<Vec<Option<ImportedSourceFile>>>, |
c295e0f8 XL |
82 | /// For every definition in this crate, maps its `DefPathHash` to its `DefIndex`. |
83 | def_path_hash_map: DefPathHashMapRef<'static>, | |
136023e0 | 84 | /// Likewise for ExpnHash. |
781aab86 | 85 | expn_hash_map: OnceLock<UnhashMap<ExpnHash, ExpnIndex>>, |
60c5eb7d XL |
86 | /// Used for decoding interpret::AllocIds in a cached & thread-safe manner. |
87 | alloc_decoding_state: AllocDecodingState, | |
3dfed10e XL |
88 | /// Caches decoded `DefKey`s. |
89 | def_key_cache: Lock<FxHashMap<DefIndex, DefKey>>, | |
60c5eb7d XL |
90 | |
91 | // --- Other significant crate properties --- | |
60c5eb7d XL |
92 | /// ID of this crate, from the current compilation session's point of view. |
93 | cnum: CrateNum, | |
94 | /// Maps crate IDs as they are were seen from this crate's compilation sessions into | |
95 | /// IDs as they are seen from the current compilation session. | |
96 | cnum_map: CrateNumMap, | |
97 | /// Same ID set as `cnum_map` plus maybe some injected crates like panic runtime. | |
c0240ec0 | 98 | dependencies: Vec<CrateNum>, |
60c5eb7d | 99 | /// How to link (or not link) this crate to the currently compiled crate. |
c0240ec0 | 100 | dep_kind: CrateDepKind, |
60c5eb7d | 101 | /// Filesystem location of this crate. |
5099ac24 | 102 | source: Lrc<CrateSource>, |
fe692bf9 FG |
103 | /// Whether or not this crate should be consider a private dependency. |
104 | /// Used by the 'exported_private_dependencies' lint, and for determining | |
105 | /// whether to emit suggestions that reference this crate. | |
c0240ec0 | 106 | private_dep: bool, |
60c5eb7d XL |
107 | /// The hash for the host proc macro. Used to support `-Z dual-proc-macro`. |
108 | host_hash: Option<Svh>, | |
c620b35d FG |
109 | /// The crate was used non-speculatively. |
110 | used: bool, | |
60c5eb7d | 111 | |
3dfed10e XL |
112 | /// Additional data used for decoding `HygieneData` (e.g. `SyntaxContext` |
113 | /// and `ExpnId`). | |
49aad941 | 114 | /// Note that we store a `HygieneDecodeContext` for each `CrateMetadata`. This is |
3dfed10e XL |
115 | /// because `SyntaxContext` ids are not globally unique, so we need |
116 | /// to track which ids we've decoded on a per-crate basis. | |
117 | hygiene_context: HygieneDecodeContext, | |
118 | ||
60c5eb7d | 119 | // --- Data used only for improving diagnostics --- |
60c5eb7d XL |
120 | /// Information about the `extern crate` item or path that caused this crate to be loaded. |
121 | /// If this is `None`, then the crate was injected (e.g., by the allocator). | |
c0240ec0 | 122 | extern_crate: Option<ExternCrate>, |
60c5eb7d XL |
123 | } |
124 | ||
dfeec247 | 125 | /// Holds information about a rustc_span::SourceFile imported from another crate. |
f2b60f7d FG |
126 | /// See `imported_source_file()` for more information. |
127 | #[derive(Clone)] | |
60c5eb7d XL |
128 | struct ImportedSourceFile { |
129 | /// This SourceFile's byte-offset within the source_map of its original crate | |
dfeec247 | 130 | original_start_pos: rustc_span::BytePos, |
60c5eb7d | 131 | /// The end of this SourceFile within the source_map of its original crate |
dfeec247 | 132 | original_end_pos: rustc_span::BytePos, |
60c5eb7d | 133 | /// The imported SourceFile's representation within the local source_map |
dfeec247 | 134 | translated_source_file: Lrc<rustc_span::SourceFile>, |
60c5eb7d XL |
135 | } |
136 | ||
137 | pub(super) struct DecodeContext<'a, 'tcx> { | |
923072b8 | 138 | opaque: MemDecoder<'a>, |
74b04a01 | 139 | cdata: Option<CrateMetadataRef<'a>>, |
c295e0f8 | 140 | blob: &'a MetadataBlob, |
dc9dc135 XL |
141 | sess: Option<&'tcx Session>, |
142 | tcx: Option<TyCtxt<'tcx>>, | |
c34b1796 | 143 | |
c30ab7b3 | 144 | lazy_state: LazyState, |
0531ce1d | 145 | |
94b46f34 XL |
146 | // Used for decoding interpret::AllocIds in a cached & thread-safe manner. |
147 | alloc_decoding_session: Option<AllocDecodingSession<'a>>, | |
223e47cc LB |
148 | } |
149 | ||
9e0c209e | 150 | /// Abstract over the various ways one can create metadata decoders. |
60c5eb7d | 151 | pub(super) trait Metadata<'a, 'tcx>: Copy { |
c295e0f8 XL |
152 | fn blob(self) -> &'a MetadataBlob; |
153 | ||
74b04a01 | 154 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
dfeec247 XL |
155 | None |
156 | } | |
157 | fn sess(self) -> Option<&'tcx Session> { | |
158 | None | |
159 | } | |
160 | fn tcx(self) -> Option<TyCtxt<'tcx>> { | |
161 | None | |
162 | } | |
b039eaaf | 163 | |
9e0c209e | 164 | fn decoder(self, pos: usize) -> DecodeContext<'a, 'tcx> { |
476ff2be | 165 | let tcx = self.tcx(); |
9e0c209e | 166 | DecodeContext { |
923072b8 | 167 | opaque: MemDecoder::new(self.blob(), pos), |
9e0c209e | 168 | cdata: self.cdata(), |
c295e0f8 | 169 | blob: self.blob(), |
476ff2be | 170 | sess: self.sess().or(tcx.map(|tcx| tcx.sess)), |
3b2f2976 | 171 | tcx, |
c30ab7b3 | 172 | lazy_state: LazyState::NoNode, |
dfeec247 XL |
173 | alloc_decoding_session: self |
174 | .cdata() | |
74b04a01 | 175 | .map(|cdata| cdata.cdata.alloc_decoding_state.new_decoding_session()), |
9e0c209e SL |
176 | } |
177 | } | |
b039eaaf SL |
178 | } |
179 | ||
9e0c209e | 180 | impl<'a, 'tcx> Metadata<'a, 'tcx> for &'a MetadataBlob { |
c295e0f8 XL |
181 | #[inline] |
182 | fn blob(self) -> &'a MetadataBlob { | |
183 | self | |
9e0c209e | 184 | } |
223e47cc LB |
185 | } |
186 | ||
dc9dc135 | 187 | impl<'a, 'tcx> Metadata<'a, 'tcx> for (&'a MetadataBlob, &'tcx Session) { |
c295e0f8 XL |
188 | #[inline] |
189 | fn blob(self) -> &'a MetadataBlob { | |
190 | self.0 | |
abe05a73 XL |
191 | } |
192 | ||
c295e0f8 | 193 | #[inline] |
dc9dc135 | 194 | fn sess(self) -> Option<&'tcx Session> { |
abe05a73 XL |
195 | let (_, sess) = self; |
196 | Some(sess) | |
197 | } | |
198 | } | |
199 | ||
5099ac24 | 200 | impl<'a, 'tcx> Metadata<'a, 'tcx> for CrateMetadataRef<'a> { |
c295e0f8 XL |
201 | #[inline] |
202 | fn blob(self) -> &'a MetadataBlob { | |
5099ac24 | 203 | &self.cdata.blob |
c30ab7b3 | 204 | } |
c295e0f8 | 205 | #[inline] |
74b04a01 | 206 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
5099ac24 | 207 | Some(self) |
c30ab7b3 | 208 | } |
a7813a04 XL |
209 | } |
210 | ||
5099ac24 | 211 | impl<'a, 'tcx> Metadata<'a, 'tcx> for (CrateMetadataRef<'a>, &'tcx Session) { |
c295e0f8 XL |
212 | #[inline] |
213 | fn blob(self) -> &'a MetadataBlob { | |
5099ac24 | 214 | &self.0.cdata.blob |
476ff2be | 215 | } |
c295e0f8 | 216 | #[inline] |
74b04a01 | 217 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
5099ac24 | 218 | Some(self.0) |
476ff2be | 219 | } |
c295e0f8 | 220 | #[inline] |
dc9dc135 | 221 | fn sess(self) -> Option<&'tcx Session> { |
5099ac24 | 222 | Some(self.1) |
476ff2be SL |
223 | } |
224 | } | |
225 | ||
5099ac24 | 226 | impl<'a, 'tcx> Metadata<'a, 'tcx> for (CrateMetadataRef<'a>, TyCtxt<'tcx>) { |
c295e0f8 XL |
227 | #[inline] |
228 | fn blob(self) -> &'a MetadataBlob { | |
5099ac24 | 229 | &self.0.cdata.blob |
c30ab7b3 | 230 | } |
c295e0f8 | 231 | #[inline] |
74b04a01 | 232 | fn cdata(self) -> Option<CrateMetadataRef<'a>> { |
5099ac24 | 233 | Some(self.0) |
c30ab7b3 | 234 | } |
c295e0f8 | 235 | #[inline] |
dc9dc135 | 236 | fn tcx(self) -> Option<TyCtxt<'tcx>> { |
c30ab7b3 SL |
237 | Some(self.1) |
238 | } | |
223e47cc LB |
239 | } |
240 | ||
923072b8 | 241 | impl<T: ParameterizedOverTcx> LazyValue<T> { |
781aab86 | 242 | #[inline] |
923072b8 FG |
243 | fn decode<'a, 'tcx, M: Metadata<'a, 'tcx>>(self, metadata: M) -> T::Value<'tcx> |
244 | where | |
245 | T::Value<'tcx>: Decodable<DecodeContext<'a, 'tcx>>, | |
246 | { | |
e74abb32 | 247 | let mut dcx = metadata.decoder(self.position.get()); |
9e0c209e | 248 | dcx.lazy_state = LazyState::NodeStart(self.position); |
923072b8 | 249 | T::Value::decode(&mut dcx) |
62682a34 SL |
250 | } |
251 | } | |
252 | ||
923072b8 FG |
253 | struct DecodeIterator<'a, 'tcx, T> { |
254 | elem_counter: std::ops::Range<usize>, | |
255 | dcx: DecodeContext<'a, 'tcx>, | |
256 | _phantom: PhantomData<fn() -> T>, | |
04454e1e FG |
257 | } |
258 | ||
923072b8 FG |
259 | impl<'a, 'tcx, T: Decodable<DecodeContext<'a, 'tcx>>> Iterator for DecodeIterator<'a, 'tcx, T> { |
260 | type Item = T; | |
5e7ed085 | 261 | |
923072b8 FG |
262 | #[inline(always)] |
263 | fn next(&mut self) -> Option<Self::Item> { | |
264 | self.elem_counter.next().map(|_| T::decode(&mut self.dcx)) | |
5e7ed085 | 265 | } |
5e7ed085 | 266 | |
923072b8 FG |
267 | #[inline(always)] |
268 | fn size_hint(&self) -> (usize, Option<usize>) { | |
269 | self.elem_counter.size_hint() | |
5e7ed085 FG |
270 | } |
271 | } | |
272 | ||
923072b8 FG |
273 | impl<'a, 'tcx, T: Decodable<DecodeContext<'a, 'tcx>>> ExactSizeIterator |
274 | for DecodeIterator<'a, 'tcx, T> | |
5e7ed085 | 275 | { |
923072b8 FG |
276 | fn len(&self) -> usize { |
277 | self.elem_counter.len() | |
5e7ed085 FG |
278 | } |
279 | } | |
280 | ||
923072b8 FG |
281 | unsafe impl<'a, 'tcx, T: Decodable<DecodeContext<'a, 'tcx>>> TrustedLen |
282 | for DecodeIterator<'a, 'tcx, T> | |
5e7ed085 | 283 | { |
5e7ed085 FG |
284 | } |
285 | ||
923072b8 | 286 | impl<T: ParameterizedOverTcx> LazyArray<T> { |
781aab86 | 287 | #[inline] |
923072b8 | 288 | fn decode<'a, 'tcx, M: Metadata<'a, 'tcx>>( |
5e7ed085 | 289 | self, |
923072b8 FG |
290 | metadata: M, |
291 | ) -> DecodeIterator<'a, 'tcx, T::Value<'tcx>> | |
292 | where | |
293 | T::Value<'tcx>: Decodable<DecodeContext<'a, 'tcx>>, | |
294 | { | |
295 | let mut dcx = metadata.decoder(self.position.get()); | |
296 | dcx.lazy_state = LazyState::NodeStart(self.position); | |
297 | DecodeIterator { elem_counter: (0..self.num_elems), dcx, _phantom: PhantomData } | |
04454e1e FG |
298 | } |
299 | } | |
300 | ||
9e0c209e | 301 | impl<'a, 'tcx> DecodeContext<'a, 'tcx> { |
c295e0f8 | 302 | #[inline] |
e74abb32 | 303 | fn tcx(&self) -> TyCtxt<'tcx> { |
353b0b11 | 304 | let Some(tcx) = self.tcx else { |
add651ee FG |
305 | bug!( |
306 | "No TyCtxt found for decoding. \ | |
307 | You need to explicitly pass `(crate_metadata_ref, tcx)` to `decode` instead of just `crate_metadata_ref`." | |
308 | ); | |
353b0b11 FG |
309 | }; |
310 | tcx | |
c295e0f8 XL |
311 | } |
312 | ||
313 | #[inline] | |
314 | pub fn blob(&self) -> &'a MetadataBlob { | |
315 | self.blob | |
9e0c209e | 316 | } |
223e47cc | 317 | |
c295e0f8 XL |
318 | #[inline] |
319 | pub fn cdata(&self) -> CrateMetadataRef<'a> { | |
320 | debug_assert!(self.cdata.is_some(), "missing CrateMetadata in DecodeContext"); | |
321 | self.cdata.unwrap() | |
9e0c209e | 322 | } |
a7813a04 | 323 | |
04454e1e | 324 | #[inline] |
17df50a5 | 325 | fn map_encoded_cnum_to_current(&self, cnum: CrateNum) -> CrateNum { |
04454e1e | 326 | self.cdata().map_encoded_cnum_to_current(cnum) |
17df50a5 XL |
327 | } |
328 | ||
923072b8 | 329 | #[inline] |
c620b35d | 330 | fn read_lazy_offset_then<T>(&mut self, f: impl Fn(NonZero<usize>) -> T) -> T { |
5099ac24 | 331 | let distance = self.read_usize(); |
9e0c209e | 332 | let position = match self.lazy_state { |
e1599b0c | 333 | LazyState::NoNode => bug!("read_lazy_with_meta: outside of a metadata node"), |
9e0c209e | 334 | LazyState::NodeStart(start) => { |
e74abb32 | 335 | let start = start.get(); |
5099ac24 FG |
336 | assert!(distance <= start); |
337 | start - distance | |
9e0c209e | 338 | } |
5099ac24 | 339 | LazyState::Previous(last_pos) => last_pos.get() + distance, |
9e0c209e | 340 | }; |
c620b35d | 341 | let position = NonZero::new(position).unwrap(); |
923072b8 FG |
342 | self.lazy_state = LazyState::Previous(position); |
343 | f(position) | |
344 | } | |
345 | ||
346 | fn read_lazy<T>(&mut self) -> LazyValue<T> { | |
347 | self.read_lazy_offset_then(|pos| LazyValue::from_position(pos)) | |
348 | } | |
349 | ||
350 | fn read_lazy_array<T>(&mut self, len: usize) -> LazyArray<T> { | |
351 | self.read_lazy_offset_then(|pos| LazyArray::from_position_and_num_elems(pos, len)) | |
352 | } | |
353 | ||
781aab86 FG |
354 | fn read_lazy_table<I, T>(&mut self, width: usize, len: usize) -> LazyTable<I, T> { |
355 | self.read_lazy_offset_then(|pos| LazyTable::from_position_and_encoded_size(pos, width, len)) | |
9e0c209e | 356 | } |
c295e0f8 XL |
357 | |
358 | #[inline] | |
5e7ed085 | 359 | pub fn read_raw_bytes(&mut self, len: usize) -> &[u8] { |
c295e0f8 XL |
360 | self.opaque.read_raw_bytes(len) |
361 | } | |
223e47cc LB |
362 | } |
363 | ||
923072b8 | 364 | impl<'a, 'tcx> TyDecoder for DecodeContext<'a, 'tcx> { |
3dfed10e XL |
365 | const CLEAR_CROSS_CRATE: bool = true; |
366 | ||
923072b8 FG |
367 | type I = TyCtxt<'tcx>; |
368 | ||
abe05a73 | 369 | #[inline] |
923072b8 FG |
370 | fn interner(&self) -> Self::I { |
371 | self.tcx() | |
abe05a73 XL |
372 | } |
373 | ||
5099ac24 | 374 | fn cached_ty_for_shorthand<F>(&mut self, shorthand: usize, or_insert_with: F) -> Ty<'tcx> |
dfeec247 | 375 | where |
5099ac24 | 376 | F: FnOnce(&mut Self) -> Ty<'tcx>, |
abe05a73 XL |
377 | { |
378 | let tcx = self.tcx(); | |
223e47cc | 379 | |
17df50a5 | 380 | let key = ty::CReaderCacheKey { cnum: Some(self.cdata().cnum), pos: shorthand }; |
1a4d82fc | 381 | |
f035d41b | 382 | if let Some(&ty) = tcx.ty_rcache.borrow().get(&key) { |
5099ac24 | 383 | return ty; |
abe05a73 | 384 | } |
223e47cc | 385 | |
5099ac24 | 386 | let ty = or_insert_with(self); |
f035d41b | 387 | tcx.ty_rcache.borrow_mut().insert(key, ty); |
5099ac24 | 388 | ty |
9e0c209e | 389 | } |
62682a34 | 390 | |
abe05a73 | 391 | fn with_position<F, R>(&mut self, pos: usize, f: F) -> R |
dfeec247 XL |
392 | where |
393 | F: FnOnce(&mut Self) -> R, | |
abe05a73 | 394 | { |
49aad941 | 395 | let new_opaque = MemDecoder::new(self.opaque.data(), pos); |
abe05a73 XL |
396 | let old_opaque = mem::replace(&mut self.opaque, new_opaque); |
397 | let old_state = mem::replace(&mut self.lazy_state, LazyState::NoNode); | |
398 | let r = f(self); | |
399 | self.opaque = old_opaque; | |
400 | self.lazy_state = old_state; | |
401 | r | |
402 | } | |
403 | ||
5099ac24 | 404 | fn decode_alloc_id(&mut self) -> rustc_middle::mir::interpret::AllocId { |
3dfed10e XL |
405 | if let Some(alloc_decoding_session) = self.alloc_decoding_session { |
406 | alloc_decoding_session.decode_alloc_id(self) | |
407 | } else { | |
408 | bug!("Attempting to decode interpret::AllocId without CrateMetadata") | |
409 | } | |
9e0c209e | 410 | } |
223e47cc LB |
411 | } |
412 | ||
136023e0 | 413 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for ExpnIndex { |
781aab86 | 414 | #[inline] |
5099ac24 FG |
415 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> ExpnIndex { |
416 | ExpnIndex::from_u32(d.read_u32()) | |
136023e0 XL |
417 | } |
418 | } | |
419 | ||
c0240ec0 FG |
420 | impl<'a, 'tcx> SpanDecoder for DecodeContext<'a, 'tcx> { |
421 | fn decode_attr_id(&mut self) -> rustc_span::AttrId { | |
422 | let sess = self.sess.expect("can't decode AttrId without Session"); | |
c620b35d | 423 | sess.psess.attr_id_generator.mk_attr_id() |
f2b60f7d | 424 | } |
f2b60f7d | 425 | |
c0240ec0 FG |
426 | fn decode_crate_num(&mut self) -> CrateNum { |
427 | let cnum = CrateNum::from_u32(self.read_u32()); | |
428 | self.map_encoded_cnum_to_current(cnum) | |
429 | } | |
353b0b11 | 430 | |
c0240ec0 FG |
431 | fn decode_def_index(&mut self) -> DefIndex { |
432 | DefIndex::from_u32(self.read_u32()) | |
433 | } | |
434 | ||
435 | fn decode_def_id(&mut self) -> DefId { | |
436 | DefId { krate: Decodable::decode(self), index: Decodable::decode(self) } | |
437 | } | |
438 | ||
439 | fn decode_syntax_context(&mut self) -> SyntaxContext { | |
440 | let cdata = self.cdata(); | |
441 | ||
442 | let Some(sess) = self.sess else { | |
add651ee FG |
443 | bug!( |
444 | "Cannot decode SyntaxContext without Session.\ | |
445 | You need to explicitly pass `(crate_metadata_ref, tcx)` to `decode` instead of just `crate_metadata_ref`." | |
446 | ); | |
353b0b11 FG |
447 | }; |
448 | ||
fe692bf9 | 449 | let cname = cdata.root.name(); |
c0240ec0 | 450 | rustc_span::hygiene::decode_syntax_context(self, &cdata.hygiene_context, |_, id| { |
3dfed10e | 451 | debug!("SpecializedDecoder<SyntaxContext>: decoding {}", id); |
5099ac24 | 452 | cdata |
3dfed10e XL |
453 | .root |
454 | .syntax_contexts | |
5099ac24 | 455 | .get(cdata, id) |
9c376795 | 456 | .unwrap_or_else(|| panic!("Missing SyntaxContext {id:?} for crate {cname:?}")) |
5099ac24 | 457 | .decode((cdata, sess)) |
3dfed10e | 458 | }) |
1a4d82fc | 459 | } |
1a4d82fc | 460 | |
c0240ec0 FG |
461 | fn decode_expn_id(&mut self) -> ExpnId { |
462 | let local_cdata = self.cdata(); | |
353b0b11 | 463 | |
c0240ec0 | 464 | let Some(sess) = self.sess else { |
add651ee FG |
465 | bug!( |
466 | "Cannot decode ExpnId without Session. \ | |
467 | You need to explicitly pass `(crate_metadata_ref, tcx)` to `decode` instead of just `crate_metadata_ref`." | |
468 | ); | |
353b0b11 | 469 | }; |
0531ce1d | 470 | |
c0240ec0 FG |
471 | let cnum = CrateNum::decode(self); |
472 | let index = u32::decode(self); | |
136023e0 XL |
473 | |
474 | let expn_id = rustc_span::hygiene::decode_expn_id(cnum, index, |expn_id| { | |
475 | let ExpnId { krate: cnum, local_id: index } = expn_id; | |
476 | // Lookup local `ExpnData`s in our own crate data. Foreign `ExpnData`s | |
477 | // are stored in the owning crate, to avoid duplication. | |
478 | debug_assert_ne!(cnum, LOCAL_CRATE); | |
479 | let crate_data = if cnum == local_cdata.cnum { | |
480 | local_cdata | |
481 | } else { | |
482 | local_cdata.cstore.get_crate_data(cnum) | |
483 | }; | |
484 | let expn_data = crate_data | |
485 | .root | |
486 | .expn_data | |
5099ac24 | 487 | .get(crate_data, index) |
136023e0 | 488 | .unwrap() |
5099ac24 | 489 | .decode((crate_data, sess)); |
136023e0 XL |
490 | let expn_hash = crate_data |
491 | .root | |
492 | .expn_hashes | |
5099ac24 | 493 | .get(crate_data, index) |
136023e0 | 494 | .unwrap() |
5099ac24 | 495 | .decode((crate_data, sess)); |
136023e0 XL |
496 | (expn_data, expn_hash) |
497 | }); | |
5099ac24 | 498 | expn_id |
0531ce1d | 499 | } |
0531ce1d | 500 | |
c0240ec0 FG |
501 | fn decode_span(&mut self) -> Span { |
502 | let start = self.position(); | |
503 | let tag = SpanTag(self.peek_byte()); | |
504 | let data = if tag.kind() == SpanKind::Indirect { | |
505 | // Skip past the tag we just peek'd. | |
506 | self.read_u8(); | |
c620b35d FG |
507 | // indirect tag lengths are safe to access, since they're (0, 8) |
508 | let bytes_needed = tag.length().unwrap().0 as usize; | |
509 | let mut total = [0u8; usize::BITS as usize / 8]; | |
510 | total[..bytes_needed].copy_from_slice(self.read_raw_bytes(bytes_needed)); | |
511 | let offset_or_position = usize::from_le_bytes(total); | |
c0240ec0 FG |
512 | let position = if tag.is_relative_offset() { |
513 | start - offset_or_position | |
514 | } else { | |
515 | offset_or_position | |
516 | }; | |
517 | self.with_position(position, SpanData::decode) | |
518 | } else { | |
519 | SpanData::decode(self) | |
add651ee FG |
520 | }; |
521 | Span::new(data.lo, data.hi, data.ctxt, data.parent) | |
522 | } | |
c0240ec0 FG |
523 | |
524 | fn decode_symbol(&mut self) -> Symbol { | |
525 | let tag = self.read_u8(); | |
526 | ||
527 | match tag { | |
528 | SYMBOL_STR => { | |
529 | let s = self.read_str(); | |
530 | Symbol::intern(s) | |
531 | } | |
532 | SYMBOL_OFFSET => { | |
533 | // read str offset | |
534 | let pos = self.read_usize(); | |
535 | ||
536 | // move to str offset and read | |
537 | self.opaque.with_position(pos, |d| { | |
538 | let s = d.read_str(); | |
539 | Symbol::intern(s) | |
540 | }) | |
541 | } | |
542 | SYMBOL_PREINTERNED => { | |
543 | let symbol_index = self.read_u32(); | |
544 | Symbol::new_from_decoded(symbol_index) | |
545 | } | |
546 | _ => unreachable!(), | |
547 | } | |
548 | } | |
add651ee FG |
549 | } |
550 | ||
551 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for SpanData { | |
552 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> SpanData { | |
c0240ec0 FG |
553 | let tag = SpanTag::decode(decoder); |
554 | let ctxt = tag.context().unwrap_or_else(|| SyntaxContext::decode(decoder)); | |
85aaf69f | 555 | |
c0240ec0 | 556 | if tag.kind() == SpanKind::Partial { |
add651ee | 557 | return DUMMY_SP.with_ctxt(ctxt).data(); |
ff7c6d11 XL |
558 | } |
559 | ||
c0240ec0 | 560 | debug_assert!(tag.kind() == SpanKind::Local || tag.kind() == SpanKind::Foreign); |
2c00a5a8 | 561 | |
5099ac24 | 562 | let lo = BytePos::decode(decoder); |
c0240ec0 | 563 | let len = tag.length().unwrap_or_else(|| BytePos::decode(decoder)); |
2c00a5a8 | 564 | let hi = lo + len; |
ff7c6d11 | 565 | |
3c0e092e | 566 | let Some(sess) = decoder.sess else { |
add651ee FG |
567 | bug!( |
568 | "Cannot decode Span without Session. \ | |
569 | You need to explicitly pass `(crate_metadata_ref, tcx)` to `decode` instead of just `crate_metadata_ref`." | |
570 | ) | |
9e0c209e | 571 | }; |
85aaf69f | 572 | |
f2b60f7d FG |
573 | // Index of the file in the corresponding crate's list of encoded files. |
574 | let metadata_index = u32::decode(decoder); | |
575 | ||
ba9703b0 XL |
576 | // There are two possibilities here: |
577 | // 1. This is a 'local span', which is located inside a `SourceFile` | |
578 | // that came from this crate. In this case, we use the source map data | |
579 | // encoded in this crate. This branch should be taken nearly all of the time. | |
580 | // 2. This is a 'foreign span', which is located inside a `SourceFile` | |
581 | // that came from a *different* crate (some crate upstream of the one | |
582 | // whose metadata we're looking at). For example, consider this dependency graph: | |
583 | // | |
584 | // A -> B -> C | |
585 | // | |
586 | // Suppose that we're currently compiling crate A, and start deserializing | |
587 | // metadata from crate B. When we deserialize a Span from crate B's metadata, | |
5e7ed085 | 588 | // there are two possibilities: |
ba9703b0 XL |
589 | // |
590 | // 1. The span references a file from crate B. This makes it a 'local' span, | |
591 | // which means that we can use crate B's serialized source map information. | |
592 | // 2. The span references a file from crate C. This makes it a 'foreign' span, | |
593 | // which means we need to use Crate *C* (not crate B) to determine the source | |
594 | // map information. We only record source map information for a file in the | |
595 | // crate that 'owns' it, so deserializing a Span may require us to look at | |
596 | // a transitive dependency. | |
597 | // | |
598 | // When we encode a foreign span, we adjust its 'lo' and 'high' values | |
599 | // to be based on the *foreign* crate (e.g. crate C), not the crate | |
600 | // we are writing metadata for (e.g. crate B). This allows us to | |
601 | // treat the 'local' and 'foreign' cases almost identically during deserialization: | |
f2b60f7d | 602 | // we can call `imported_source_file` for the proper crate, and binary search |
ba9703b0 | 603 | // through the returned slice using our span. |
c0240ec0 | 604 | let source_file = if tag.kind() == SpanKind::Local { |
f2b60f7d | 605 | decoder.cdata().imported_source_file(metadata_index, sess) |
ba9703b0 | 606 | } else { |
f035d41b XL |
607 | // When we encode a proc-macro crate, all `Span`s should be encoded |
608 | // with `TAG_VALID_SPAN_LOCAL` | |
3dfed10e | 609 | if decoder.cdata().root.is_proc_macro_crate() { |
ba9703b0 XL |
610 | // Decode `CrateNum` as u32 - using `CrateNum::decode` will ICE |
611 | // since we don't have `cnum_map` populated. | |
5099ac24 | 612 | let cnum = u32::decode(decoder); |
f035d41b XL |
613 | panic!( |
614 | "Decoding of crate {:?} tried to access proc-macro dep {:?}", | |
fe692bf9 | 615 | decoder.cdata().root.header.name, |
f035d41b XL |
616 | cnum |
617 | ); | |
ba9703b0 XL |
618 | } |
619 | // tag is TAG_VALID_SPAN_FOREIGN, checked by `debug_assert` above | |
5099ac24 | 620 | let cnum = CrateNum::decode(decoder); |
ba9703b0 XL |
621 | debug!( |
622 | "SpecializedDecoder<Span>::specialized_decode: loading source files from cnum {:?}", | |
623 | cnum | |
624 | ); | |
625 | ||
3dfed10e | 626 | let foreign_data = decoder.cdata().cstore.get_crate_data(cnum); |
f2b60f7d | 627 | foreign_data.imported_source_file(metadata_index, sess) |
9e0c209e SL |
628 | }; |
629 | ||
f2b60f7d | 630 | // Make sure our span is well-formed. |
ba9703b0 | 631 | debug_assert!( |
f2b60f7d FG |
632 | lo + source_file.original_start_pos <= source_file.original_end_pos, |
633 | "Malformed encoded span: lo={:?} source_file.original_start_pos={:?} source_file.original_end_pos={:?}", | |
ba9703b0 XL |
634 | lo, |
635 | source_file.original_start_pos, | |
636 | source_file.original_end_pos | |
637 | ); | |
ff7c6d11 | 638 | |
f2b60f7d | 639 | // Make sure we correctly filtered out invalid spans during encoding. |
ba9703b0 | 640 | debug_assert!( |
f2b60f7d FG |
641 | hi + source_file.original_start_pos <= source_file.original_end_pos, |
642 | "Malformed encoded span: hi={:?} source_file.original_start_pos={:?} source_file.original_end_pos={:?}", | |
ba9703b0 XL |
643 | hi, |
644 | source_file.original_start_pos, | |
645 | source_file.original_end_pos | |
646 | ); | |
ff7c6d11 | 647 | |
f2b60f7d FG |
648 | let lo = lo + source_file.translated_source_file.start_pos; |
649 | let hi = hi + source_file.translated_source_file.start_pos; | |
9e0c209e | 650 | |
c295e0f8 | 651 | // Do not try to decode parent for foreign spans. |
add651ee | 652 | SpanData { lo, hi, ctxt, parent: None } |
e1599b0c XL |
653 | } |
654 | } | |
655 | ||
fe692bf9 | 656 | impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for &'tcx [(ty::Clause<'tcx>, Span)] { |
5099ac24 | 657 | fn decode(d: &mut DecodeContext<'a, 'tcx>) -> Self { |
3dfed10e XL |
658 | ty::codec::RefDecodable::decode(d) |
659 | } | |
660 | } | |
661 | ||
923072b8 | 662 | impl<'a, 'tcx, T> Decodable<DecodeContext<'a, 'tcx>> for LazyValue<T> { |
5099ac24 | 663 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Self { |
923072b8 | 664 | decoder.read_lazy() |
2c00a5a8 XL |
665 | } |
666 | } | |
667 | ||
923072b8 | 668 | impl<'a, 'tcx, T> Decodable<DecodeContext<'a, 'tcx>> for LazyArray<T> { |
781aab86 | 669 | #[inline] |
5099ac24 FG |
670 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Self { |
671 | let len = decoder.read_usize(); | |
9ffffee4 | 672 | if len == 0 { LazyArray::default() } else { decoder.read_lazy_array(len) } |
3dfed10e XL |
673 | } |
674 | } | |
675 | ||
923072b8 | 676 | impl<'a, 'tcx, I: Idx, T> Decodable<DecodeContext<'a, 'tcx>> for LazyTable<I, T> { |
5099ac24 | 677 | fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Self { |
781aab86 | 678 | let width = decoder.read_usize(); |
5099ac24 | 679 | let len = decoder.read_usize(); |
781aab86 | 680 | decoder.read_lazy_table(width, len) |
ff7c6d11 XL |
681 | } |
682 | } | |
683 | ||
dfeec247 | 684 | implement_ty_decoder!(DecodeContext<'a, 'tcx>); |
ea8adc8c | 685 | |
923072b8 | 686 | impl MetadataBlob { |
c620b35d FG |
687 | pub(crate) fn check_compatibility( |
688 | &self, | |
689 | cfg_version: &'static str, | |
690 | ) -> Result<(), Option<String>> { | |
691 | if !self.blob().starts_with(METADATA_HEADER) { | |
692 | if self.blob().starts_with(b"rust") { | |
693 | return Err(Some("<unknown rustc version>".to_owned())); | |
694 | } | |
695 | return Err(None); | |
696 | } | |
85aaf69f | 697 | |
c620b35d FG |
698 | let found_version = |
699 | LazyValue::<String>::from_position(NonZero::new(METADATA_HEADER.len() + 8).unwrap()) | |
700 | .decode(self); | |
701 | if rustc_version(cfg_version) != found_version { | |
702 | return Err(Some(found_version)); | |
703 | } | |
704 | ||
705 | Ok(()) | |
476ff2be SL |
706 | } |
707 | ||
c620b35d | 708 | fn root_pos(&self) -> NonZero<usize> { |
fe692bf9 | 709 | let offset = METADATA_HEADER.len(); |
4b012472 FG |
710 | let pos_bytes = self.blob()[offset..][..8].try_into().unwrap(); |
711 | let pos = u64::from_le_bytes(pos_bytes); | |
c620b35d | 712 | NonZero::new(pos as usize).unwrap() |
4b012472 | 713 | } |
fe692bf9 | 714 | |
4b012472 FG |
715 | pub(crate) fn get_header(&self) -> CrateHeader { |
716 | let pos = self.root_pos(); | |
717 | LazyValue::<CrateHeader>::from_position(pos).decode(self) | |
fe692bf9 FG |
718 | } |
719 | ||
923072b8 | 720 | pub(crate) fn get_root(&self) -> CrateRoot { |
4b012472 FG |
721 | let pos = self.root_pos(); |
722 | LazyValue::<CrateRoot>::from_position(pos).decode(self) | |
9e0c209e SL |
723 | } |
724 | ||
781aab86 FG |
725 | pub(crate) fn list_crate_metadata( |
726 | &self, | |
727 | out: &mut dyn io::Write, | |
728 | ls_kinds: &[String], | |
729 | ) -> io::Result<()> { | |
9e0c209e | 730 | let root = self.get_root(); |
781aab86 FG |
731 | |
732 | let all_ls_kinds = vec![ | |
733 | "root".to_owned(), | |
734 | "lang_items".to_owned(), | |
735 | "features".to_owned(), | |
736 | "items".to_owned(), | |
737 | ]; | |
738 | let ls_kinds = if ls_kinds.contains(&"all".to_owned()) { &all_ls_kinds } else { ls_kinds }; | |
739 | ||
740 | for kind in ls_kinds { | |
741 | match &**kind { | |
742 | "root" => { | |
743 | writeln!(out, "Crate info:")?; | |
744 | writeln!(out, "name {}{}", root.name(), root.extra_filename)?; | |
745 | writeln!( | |
746 | out, | |
747 | "hash {} stable_crate_id {:?}", | |
748 | root.hash(), | |
749 | root.stable_crate_id | |
750 | )?; | |
751 | writeln!(out, "proc_macro {:?}", root.proc_macro_data.is_some())?; | |
752 | writeln!(out, "triple {}", root.header.triple.triple())?; | |
753 | writeln!(out, "edition {}", root.edition)?; | |
754 | writeln!(out, "symbol_mangling_version {:?}", root.symbol_mangling_version)?; | |
755 | writeln!( | |
756 | out, | |
757 | "required_panic_strategy {:?} panic_in_drop_strategy {:?}", | |
758 | root.required_panic_strategy, root.panic_in_drop_strategy | |
759 | )?; | |
760 | writeln!( | |
761 | out, | |
762 | "has_global_allocator {} has_alloc_error_handler {} has_panic_handler {} has_default_lib_allocator {}", | |
763 | root.has_global_allocator, | |
764 | root.has_alloc_error_handler, | |
765 | root.has_panic_handler, | |
766 | root.has_default_lib_allocator | |
767 | )?; | |
768 | writeln!( | |
769 | out, | |
770 | "compiler_builtins {} needs_allocator {} needs_panic_runtime {} no_builtins {} panic_runtime {} profiler_runtime {}", | |
771 | root.compiler_builtins, | |
772 | root.needs_allocator, | |
773 | root.needs_panic_runtime, | |
774 | root.no_builtins, | |
775 | root.panic_runtime, | |
776 | root.profiler_runtime | |
777 | )?; | |
778 | ||
779 | writeln!(out, "=External Dependencies=")?; | |
780 | let dylib_dependency_formats = | |
781 | root.dylib_dependency_formats.decode(self).collect::<Vec<_>>(); | |
782 | for (i, dep) in root.crate_deps.decode(self).enumerate() { | |
783 | let CrateDep { name, extra_filename, hash, host_hash, kind, is_private } = | |
784 | dep; | |
785 | let number = i + 1; | |
786 | ||
787 | writeln!( | |
788 | out, | |
789 | "{number} {name}{extra_filename} hash {hash} host_hash {host_hash:?} kind {kind:?} {privacy}{linkage}", | |
790 | privacy = if is_private { "private" } else { "public" }, | |
791 | linkage = if dylib_dependency_formats.is_empty() { | |
792 | String::new() | |
793 | } else { | |
794 | format!(" linkage {:?}", dylib_dependency_formats[i]) | |
795 | } | |
796 | )?; | |
797 | } | |
798 | write!(out, "\n")?; | |
799 | } | |
800 | ||
801 | "lang_items" => { | |
802 | writeln!(out, "=Lang items=")?; | |
803 | for (id, lang_item) in root.lang_items.decode(self) { | |
804 | writeln!( | |
805 | out, | |
806 | "{} = crate{}", | |
807 | lang_item.name(), | |
808 | DefPath::make(LOCAL_CRATE, id, |parent| root | |
809 | .tables | |
810 | .def_keys | |
811 | .get(self, parent) | |
812 | .unwrap() | |
813 | .decode(self)) | |
814 | .to_string_no_crate_verbose() | |
815 | )?; | |
816 | } | |
817 | for lang_item in root.lang_items_missing.decode(self) { | |
818 | writeln!(out, "{} = <missing>", lang_item.name())?; | |
819 | } | |
820 | write!(out, "\n")?; | |
821 | } | |
822 | ||
823 | "features" => { | |
824 | writeln!(out, "=Lib features=")?; | |
825 | for (feature, since) in root.lib_features.decode(self) { | |
826 | writeln!( | |
827 | out, | |
828 | "{}{}", | |
829 | feature, | |
4b012472 | 830 | if let FeatureStability::AcceptedSince(since) = since { |
781aab86 FG |
831 | format!(" since {since}") |
832 | } else { | |
833 | String::new() | |
834 | } | |
835 | )?; | |
836 | } | |
837 | write!(out, "\n")?; | |
838 | } | |
839 | ||
840 | "items" => { | |
841 | writeln!(out, "=Items=")?; | |
842 | ||
843 | fn print_item( | |
844 | blob: &MetadataBlob, | |
845 | out: &mut dyn io::Write, | |
846 | item: DefIndex, | |
847 | indent: usize, | |
848 | ) -> io::Result<()> { | |
849 | let root = blob.get_root(); | |
850 | ||
4b012472 | 851 | let def_kind = root.tables.def_kind.get(blob, item).unwrap(); |
781aab86 FG |
852 | let def_key = root.tables.def_keys.get(blob, item).unwrap().decode(blob); |
853 | let def_name = if item == CRATE_DEF_INDEX { | |
854 | rustc_span::symbol::kw::Crate | |
855 | } else { | |
856 | def_key | |
857 | .disambiguated_data | |
858 | .data | |
859 | .get_opt_name() | |
860 | .unwrap_or_else(|| Symbol::intern("???")) | |
861 | }; | |
862 | let visibility = | |
863 | root.tables.visibility.get(blob, item).unwrap().decode(blob).map_id( | |
864 | |index| { | |
865 | format!( | |
866 | "crate{}", | |
867 | DefPath::make(LOCAL_CRATE, index, |parent| root | |
868 | .tables | |
869 | .def_keys | |
870 | .get(blob, parent) | |
871 | .unwrap() | |
872 | .decode(blob)) | |
873 | .to_string_no_crate_verbose() | |
874 | ) | |
875 | }, | |
876 | ); | |
877 | write!( | |
878 | out, | |
879 | "{nil: <indent$}{:?} {:?} {} {{", | |
880 | visibility, | |
881 | def_kind, | |
882 | def_name, | |
883 | nil = "", | |
884 | )?; | |
885 | ||
886 | if let Some(children) = | |
887 | root.tables.module_children_non_reexports.get(blob, item) | |
888 | { | |
889 | write!(out, "\n")?; | |
890 | for child in children.decode(blob) { | |
891 | print_item(blob, out, child, indent + 4)?; | |
892 | } | |
893 | writeln!(out, "{nil: <indent$}}}", nil = "")?; | |
894 | } else { | |
895 | writeln!(out, "}}")?; | |
896 | } | |
897 | ||
898 | Ok(()) | |
899 | } | |
900 | ||
901 | print_item(self, out, CRATE_DEF_INDEX, 0)?; | |
902 | ||
903 | write!(out, "\n")?; | |
904 | } | |
905 | ||
906 | _ => { | |
907 | writeln!( | |
908 | out, | |
909 | "unknown -Zls kind. allowed values are: all, root, lang_items, features, items" | |
910 | )?; | |
911 | } | |
912 | } | |
1a4d82fc | 913 | } |
781aab86 | 914 | |
9e0c209e | 915 | Ok(()) |
970d7e83 | 916 | } |
223e47cc LB |
917 | } |
918 | ||
923072b8 FG |
919 | impl CrateRoot { |
920 | pub(crate) fn is_proc_macro_crate(&self) -> bool { | |
60c5eb7d XL |
921 | self.proc_macro_data.is_some() |
922 | } | |
923 | ||
923072b8 | 924 | pub(crate) fn name(&self) -> Symbol { |
fe692bf9 | 925 | self.header.name |
60c5eb7d XL |
926 | } |
927 | ||
923072b8 | 928 | pub(crate) fn hash(&self) -> Svh { |
fe692bf9 | 929 | self.header.hash |
60c5eb7d XL |
930 | } |
931 | ||
923072b8 | 932 | pub(crate) fn stable_crate_id(&self) -> StableCrateId { |
6a06907d XL |
933 | self.stable_crate_id |
934 | } | |
935 | ||
923072b8 | 936 | pub(crate) fn decode_crate_deps<'a>( |
60c5eb7d XL |
937 | &self, |
938 | metadata: &'a MetadataBlob, | |
939 | ) -> impl ExactSizeIterator<Item = CrateDep> + Captures<'a> { | |
940 | self.crate_deps.decode(metadata) | |
941 | } | |
942 | } | |
943 | ||
74b04a01 | 944 | impl<'a, 'tcx> CrateMetadataRef<'a> { |
353b0b11 FG |
945 | fn missing(self, descr: &str, id: DefIndex) -> ! { |
946 | bug!("missing `{descr}` for {:?}", self.local_def_id(id)) | |
947 | } | |
948 | ||
5099ac24 | 949 | fn raw_proc_macro(self, id: DefIndex) -> &'a ProcMacro { |
e1599b0c XL |
950 | // DefIndex's in root.proc_macro_data have a one-to-one correspondence |
951 | // with items in 'raw_proc_macros'. | |
1b1a35ee XL |
952 | let pos = self |
953 | .root | |
954 | .proc_macro_data | |
955 | .as_ref() | |
956 | .unwrap() | |
957 | .macros | |
958 | .decode(self) | |
959 | .position(|i| i == id) | |
960 | .unwrap(); | |
e1599b0c XL |
961 | &self.raw_proc_macros.unwrap()[pos] |
962 | } | |
963 | ||
5e7ed085 | 964 | fn opt_item_name(self, item_index: DefIndex) -> Option<Symbol> { |
2b03887a FG |
965 | let def_key = self.def_key(item_index); |
966 | def_key.disambiguated_data.data.get_opt_name().or_else(|| { | |
967 | if def_key.disambiguated_data.data == DefPathData::Ctor { | |
968 | let parent_index = def_key.parent.expect("no parent for a constructor"); | |
969 | self.def_key(parent_index).disambiguated_data.data.get_opt_name() | |
970 | } else { | |
971 | None | |
972 | } | |
973 | }) | |
5e7ed085 FG |
974 | } |
975 | ||
976 | fn item_name(self, item_index: DefIndex) -> Symbol { | |
977 | self.opt_item_name(item_index).expect("no encoded ident for item") | |
978 | } | |
979 | ||
5099ac24 | 980 | fn opt_item_ident(self, item_index: DefIndex, sess: &Session) -> Option<Ident> { |
5e7ed085 | 981 | let name = self.opt_item_name(item_index)?; |
353b0b11 FG |
982 | let span = self |
983 | .root | |
984 | .tables | |
985 | .def_ident_span | |
986 | .get(self, item_index) | |
987 | .unwrap_or_else(|| self.missing("def_ident_span", item_index)) | |
988 | .decode((self, sess)); | |
a2a8927a | 989 | Some(Ident::new(name, span)) |
223e47cc | 990 | } |
223e47cc | 991 | |
5099ac24 | 992 | fn item_ident(self, item_index: DefIndex, sess: &Session) -> Ident { |
a2a8927a | 993 | self.opt_item_ident(item_index, sess).expect("no encoded ident for item") |
5869c6ff XL |
994 | } |
995 | ||
04454e1e FG |
996 | #[inline] |
997 | pub(super) fn map_encoded_cnum_to_current(self, cnum: CrateNum) -> CrateNum { | |
998 | if cnum == LOCAL_CRATE { self.cnum } else { self.cnum_map[cnum] } | |
999 | } | |
1000 | ||
5099ac24 | 1001 | fn def_kind(self, item_id: DefIndex) -> DefKind { |
4b012472 FG |
1002 | self.root |
1003 | .tables | |
1004 | .def_kind | |
1005 | .get(self, item_id) | |
1006 | .unwrap_or_else(|| self.missing("def_kind", item_id)) | |
476ff2be SL |
1007 | } |
1008 | ||
5099ac24 | 1009 | fn get_span(self, index: DefIndex, sess: &Session) -> Span { |
1b1a35ee XL |
1010 | self.root |
1011 | .tables | |
5e7ed085 | 1012 | .def_span |
1b1a35ee | 1013 | .get(self, index) |
353b0b11 | 1014 | .unwrap_or_else(|| self.missing("def_span", index)) |
1b1a35ee | 1015 | .decode((self, sess)) |
e1599b0c XL |
1016 | } |
1017 | ||
add651ee | 1018 | fn load_proc_macro(self, id: DefIndex, tcx: TyCtxt<'tcx>) -> SyntaxExtension { |
136023e0 | 1019 | let (name, kind, helper_attrs) = match *self.raw_proc_macro(id) { |
e1599b0c XL |
1020 | ProcMacro::CustomDerive { trait_name, attributes, client } => { |
1021 | let helper_attrs = | |
1022 | attributes.iter().cloned().map(Symbol::intern).collect::<Vec<_>>(); | |
1023 | ( | |
1024 | trait_name, | |
923072b8 | 1025 | SyntaxExtensionKind::Derive(Box::new(DeriveProcMacro { client })), |
e1599b0c XL |
1026 | helper_attrs, |
1027 | ) | |
1028 | } | |
136023e0 XL |
1029 | ProcMacro::Attr { name, client } => { |
1030 | (name, SyntaxExtensionKind::Attr(Box::new(AttrProcMacro { client })), Vec::new()) | |
1031 | } | |
1032 | ProcMacro::Bang { name, client } => { | |
1033 | (name, SyntaxExtensionKind::Bang(Box::new(BangProcMacro { client })), Vec::new()) | |
1034 | } | |
e1599b0c | 1035 | }; |
e1599b0c | 1036 | |
add651ee | 1037 | let sess = tcx.sess; |
136023e0 | 1038 | let attrs: Vec<_> = self.get_item_attrs(id, sess).collect(); |
e1599b0c | 1039 | SyntaxExtension::new( |
3dfed10e | 1040 | sess, |
add651ee | 1041 | tcx.features(), |
e1599b0c | 1042 | kind, |
136023e0 | 1043 | self.get_span(id, sess), |
e1599b0c | 1044 | helper_attrs, |
e74abb32 | 1045 | self.root.edition, |
e1599b0c | 1046 | Symbol::intern(name), |
fc512014 | 1047 | &attrs, |
c0240ec0 | 1048 | false, |
e1599b0c | 1049 | ) |
7453a54e SL |
1050 | } |
1051 | ||
49aad941 FG |
1052 | fn get_explicit_item_bounds( |
1053 | self, | |
1054 | index: DefIndex, | |
1055 | tcx: TyCtxt<'tcx>, | |
fe692bf9 | 1056 | ) -> ty::EarlyBinder<&'tcx [(ty::Clause<'tcx>, Span)]> { |
49aad941 FG |
1057 | let lazy = self.root.tables.explicit_item_bounds.get(self, index); |
1058 | let output = if lazy.is_default() { | |
1059 | &mut [] | |
1060 | } else { | |
1061 | tcx.arena.alloc_from_iter(lazy.decode((self, tcx))) | |
1062 | }; | |
fe692bf9 | 1063 | ty::EarlyBinder::bind(&*output) |
49aad941 FG |
1064 | } |
1065 | ||
353b0b11 FG |
1066 | fn get_variant( |
1067 | self, | |
1068 | kind: DefKind, | |
1069 | index: DefIndex, | |
1070 | parent_did: DefId, | |
1071 | ) -> (VariantIdx, ty::VariantDef) { | |
e74abb32 | 1072 | let adt_kind = match kind { |
f2b60f7d FG |
1073 | DefKind::Variant => ty::AdtKind::Enum, |
1074 | DefKind::Struct => ty::AdtKind::Struct, | |
1075 | DefKind::Union => ty::AdtKind::Union, | |
e74abb32 XL |
1076 | _ => bug!(), |
1077 | }; | |
1078 | ||
f2b60f7d FG |
1079 | let data = self.root.tables.variant_data.get(self, index).unwrap().decode(self); |
1080 | ||
dfeec247 XL |
1081 | let variant_did = |
1082 | if adt_kind == ty::AdtKind::Enum { Some(self.local_def_id(index)) } else { None }; | |
487cf647 | 1083 | let ctor = data.ctor.map(|(kind, index)| (kind, self.local_def_id(index))); |
0bf4aa26 | 1084 | |
353b0b11 FG |
1085 | ( |
1086 | data.idx, | |
1087 | ty::VariantDef::new( | |
1088 | self.item_name(index), | |
1089 | variant_did, | |
1090 | ctor, | |
1091 | data.discr, | |
49aad941 FG |
1092 | self.get_associated_item_or_field_def_ids(index) |
1093 | .map(|did| ty::FieldDef { | |
1094 | did, | |
1095 | name: self.item_name(did.index), | |
1096 | vis: self.get_visibility(did.index), | |
353b0b11 FG |
1097 | }) |
1098 | .collect(), | |
1099 | adt_kind, | |
1100 | parent_did, | |
1101 | false, | |
1102 | data.is_non_exhaustive, | |
c620b35d FG |
1103 | // FIXME: unnamed fields in crate metadata is unimplemented yet. |
1104 | false, | |
353b0b11 | 1105 | ), |
b7449926 | 1106 | ) |
c30ab7b3 SL |
1107 | } |
1108 | ||
5e7ed085 | 1109 | fn get_adt_def(self, item_id: DefIndex, tcx: TyCtxt<'tcx>) -> ty::AdtDef<'tcx> { |
f2b60f7d | 1110 | let kind = self.def_kind(item_id); |
9e0c209e | 1111 | let did = self.local_def_id(item_id); |
94b46f34 | 1112 | |
5e7ed085 | 1113 | let adt_kind = match kind { |
f2b60f7d FG |
1114 | DefKind::Enum => ty::AdtKind::Enum, |
1115 | DefKind::Struct => ty::AdtKind::Struct, | |
1116 | DefKind::Union => ty::AdtKind::Union, | |
8bb4bdeb XL |
1117 | _ => bug!("get_adt_def called on a non-ADT {:?}", did), |
1118 | }; | |
5e7ed085 | 1119 | let repr = self.root.tables.repr_options.get(self, item_id).unwrap().decode(self); |
94b46f34 | 1120 | |
353b0b11 | 1121 | let mut variants: Vec<_> = if let ty::AdtKind::Enum = adt_kind { |
dfeec247 | 1122 | self.root |
ba9703b0 | 1123 | .tables |
49aad941 | 1124 | .module_children_non_reexports |
dfeec247 | 1125 | .get(self, item_id) |
9ffffee4 | 1126 | .expect("variants are not encoded for an enum") |
c30ab7b3 | 1127 | .decode(self) |
2b03887a FG |
1128 | .filter_map(|index| { |
1129 | let kind = self.def_kind(index); | |
1130 | match kind { | |
1131 | DefKind::Ctor(..) => None, | |
353b0b11 | 1132 | _ => Some(self.get_variant(kind, index, did)), |
2b03887a FG |
1133 | } |
1134 | }) | |
c30ab7b3 SL |
1135 | .collect() |
1136 | } else { | |
353b0b11 | 1137 | std::iter::once(self.get_variant(kind, item_id, did)).collect() |
9e0c209e | 1138 | }; |
9cc50fc6 | 1139 | |
353b0b11 | 1140 | variants.sort_by_key(|(idx, _)| *idx); |
9cc50fc6 | 1141 | |
353b0b11 FG |
1142 | tcx.mk_adt_def( |
1143 | did, | |
1144 | adt_kind, | |
1145 | variants.into_iter().map(|(_, variant)| variant).collect(), | |
1146 | repr, | |
c620b35d | 1147 | false, |
353b0b11 | 1148 | ) |
9e0c209e | 1149 | } |
1a4d82fc | 1150 | |
353b0b11 | 1151 | fn get_visibility(self, id: DefIndex) -> Visibility<DefId> { |
f2b60f7d FG |
1152 | self.root |
1153 | .tables | |
1154 | .visibility | |
1155 | .get(self, id) | |
353b0b11 | 1156 | .unwrap_or_else(|| self.missing("visibility", id)) |
f2b60f7d FG |
1157 | .decode(self) |
1158 | .map_id(|index| self.local_def_id(index)) | |
9e0c209e | 1159 | } |
1a4d82fc | 1160 | |
5099ac24 | 1161 | fn get_trait_item_def_id(self, id: DefIndex) -> Option<DefId> { |
923072b8 | 1162 | self.root.tables.trait_item_def_id.get(self, id).map(|d| d.decode_from_cdata(self)) |
5099ac24 FG |
1163 | } |
1164 | ||
5099ac24 | 1165 | fn get_expn_that_defined(self, id: DefIndex, sess: &Session) -> ExpnId { |
353b0b11 FG |
1166 | self.root |
1167 | .tables | |
1168 | .expn_that_defined | |
1169 | .get(self, id) | |
1170 | .unwrap_or_else(|| self.missing("expn_that_defined", id)) | |
1171 | .decode((self, sess)) | |
29967ef6 XL |
1172 | } |
1173 | ||
49aad941 | 1174 | fn get_debugger_visualizers(self) -> Vec<DebuggerVisualizerFile> { |
04454e1e FG |
1175 | self.root.debugger_visualizers.decode(self).collect::<Vec<_>>() |
1176 | } | |
1177 | ||
b7449926 | 1178 | /// Iterates over all the stability attributes in the given crate. |
4b012472 FG |
1179 | fn get_lib_features(self) -> LibFeatures { |
1180 | LibFeatures { | |
1181 | stability: self | |
1182 | .root | |
1183 | .lib_features | |
1184 | .decode(self) | |
1185 | .map(|(sym, stab)| (sym, (stab, DUMMY_SP))) | |
1186 | .collect(), | |
1187 | } | |
9e0c209e | 1188 | } |
223e47cc | 1189 | |
064997fb FG |
1190 | /// Iterates over the stability implications in the given crate (when a `#[unstable]` attribute |
1191 | /// has an `implied_by` meta item, then the mapping from the implied feature to the actual | |
1192 | /// feature is a stability implication). | |
1193 | fn get_stability_implications(self, tcx: TyCtxt<'tcx>) -> &'tcx [(Symbol, Symbol)] { | |
1194 | tcx.arena.alloc_from_iter(self.root.stability_implications.decode(self)) | |
1195 | } | |
1196 | ||
b7449926 | 1197 | /// Iterates over the language items in the given crate. |
487cf647 | 1198 | fn get_lang_items(self, tcx: TyCtxt<'tcx>) -> &'tcx [(DefId, LangItem)] { |
5e7ed085 FG |
1199 | tcx.arena.alloc_from_iter( |
1200 | self.root | |
1201 | .lang_items | |
1202 | .decode(self) | |
1203 | .map(move |(def_index, index)| (self.local_def_id(def_index), index)), | |
1204 | ) | |
b7449926 XL |
1205 | } |
1206 | ||
fe692bf9 FG |
1207 | fn get_stripped_cfg_items(self, cnum: CrateNum, tcx: TyCtxt<'tcx>) -> &'tcx [StrippedCfgItem] { |
1208 | let item_names = self | |
1209 | .root | |
1210 | .stripped_cfg_items | |
1211 | .decode((self, tcx)) | |
1212 | .map(|item| item.map_mod_id(|index| DefId { krate: cnum, index })); | |
1213 | tcx.arena.alloc_from_iter(item_names) | |
1214 | } | |
1215 | ||
e1599b0c | 1216 | /// Iterates over the diagnostic items in the given crate. |
5099ac24 | 1217 | fn get_diagnostic_items(self) -> DiagnosticItems { |
4b012472 | 1218 | let mut id_to_name = DefIdMap::default(); |
5099ac24 FG |
1219 | let name_to_id = self |
1220 | .root | |
1221 | .diagnostic_items | |
1222 | .decode(self) | |
1223 | .map(|(name, def_index)| { | |
1224 | let id = self.local_def_id(def_index); | |
1225 | id_to_name.insert(id, name); | |
1226 | (name, id) | |
1227 | }) | |
1228 | .collect(); | |
1229 | DiagnosticItems { id_to_name, name_to_id } | |
e1599b0c XL |
1230 | } |
1231 | ||
487cf647 FG |
1232 | fn get_mod_child(self, id: DefIndex, sess: &Session) -> ModChild { |
1233 | let ident = self.item_ident(id, sess); | |
353b0b11 | 1234 | let res = Res::Def(self.def_kind(id), self.local_def_id(id)); |
487cf647 | 1235 | let vis = self.get_visibility(id); |
487cf647 | 1236 | |
49aad941 | 1237 | ModChild { ident, res, vis, reexport_chain: Default::default() } |
487cf647 FG |
1238 | } |
1239 | ||
5099ac24 FG |
1240 | /// Iterates over all named children of the given module, |
1241 | /// including both proper items and reexports. | |
1242 | /// Module here is understood in name resolution sense - it can be a `mod` item, | |
1243 | /// or a crate root, or an enum, or a trait. | |
487cf647 | 1244 | fn get_module_children( |
5099ac24 FG |
1245 | self, |
1246 | id: DefIndex, | |
487cf647 FG |
1247 | sess: &'a Session, |
1248 | ) -> impl Iterator<Item = ModChild> + 'a { | |
ed00b5ec | 1249 | iter::from_coroutine(move || { |
487cf647 FG |
1250 | if let Some(data) = &self.root.proc_macro_data { |
1251 | // If we are loading as a proc macro, we want to return | |
1252 | // the view of this crate as a proc macro crate. | |
1253 | if id == CRATE_DEF_INDEX { | |
1254 | for child_index in data.macros.decode(self) { | |
1255 | yield self.get_mod_child(child_index, sess); | |
f2b60f7d | 1256 | } |
487cf647 FG |
1257 | } |
1258 | } else { | |
1259 | // Iterate over all children. | |
49aad941 FG |
1260 | let non_reexports = self.root.tables.module_children_non_reexports.get(self, id); |
1261 | for child_index in non_reexports.unwrap().decode(self) { | |
1262 | yield self.get_mod_child(child_index, sess); | |
487cf647 | 1263 | } |
04454e1e | 1264 | |
353b0b11 FG |
1265 | let reexports = self.root.tables.module_children_reexports.get(self, id); |
1266 | if !reexports.is_default() { | |
487cf647 FG |
1267 | for reexport in reexports.decode((self, sess)) { |
1268 | yield reexport; | |
04454e1e | 1269 | } |
d9579d0f AL |
1270 | } |
1271 | } | |
487cf647 | 1272 | }) |
9e0c209e | 1273 | } |
1a4d82fc | 1274 | |
5099ac24 | 1275 | fn is_ctfe_mir_available(self, id: DefIndex) -> bool { |
5869c6ff XL |
1276 | self.root.tables.mir_for_ctfe.get(self, id).is_some() |
1277 | } | |
1278 | ||
5099ac24 | 1279 | fn is_item_mir_available(self, id: DefIndex) -> bool { |
5e7ed085 | 1280 | self.root.tables.optimized_mir.get(self, id).is_some() |
9e0c209e | 1281 | } |
1a4d82fc | 1282 | |
ed00b5ec | 1283 | fn cross_crate_inlinable(self, id: DefIndex) -> bool { |
c0240ec0 | 1284 | self.root.tables.cross_crate_inlinable.get(self, id) |
ed00b5ec FG |
1285 | } |
1286 | ||
f2b60f7d FG |
1287 | fn get_fn_has_self_parameter(self, id: DefIndex, sess: &'a Session) -> bool { |
1288 | self.root | |
1289 | .tables | |
1290 | .fn_arg_names | |
1291 | .get(self, id) | |
9ffffee4 | 1292 | .expect("argument names not encoded for a function") |
f2b60f7d FG |
1293 | .decode((self, sess)) |
1294 | .nth(0) | |
49aad941 | 1295 | .is_some_and(|ident| ident.name == kw::SelfLower) |
a2a8927a XL |
1296 | } |
1297 | ||
49aad941 | 1298 | fn get_associated_item_or_field_def_ids( |
04454e1e FG |
1299 | self, |
1300 | id: DefIndex, | |
04454e1e FG |
1301 | ) -> impl Iterator<Item = DefId> + 'a { |
1302 | self.root | |
1303 | .tables | |
49aad941 | 1304 | .associated_item_or_field_def_ids |
04454e1e | 1305 | .get(self, id) |
49aad941 FG |
1306 | .unwrap_or_else(|| self.missing("associated_item_or_field_def_ids", id)) |
1307 | .decode(self) | |
04454e1e | 1308 | .map(move |child_index| self.local_def_id(child_index)) |
5099ac24 FG |
1309 | } |
1310 | ||
f2b60f7d | 1311 | fn get_associated_item(self, id: DefIndex, sess: &'a Session) -> ty::AssocItem { |
353b0b11 FG |
1312 | let name = if self.root.tables.opt_rpitit_info.get(self, id).is_some() { |
1313 | kw::Empty | |
1314 | } else { | |
1315 | self.item_name(id) | |
1316 | }; | |
9ffffee4 FG |
1317 | let (kind, has_self) = match self.def_kind(id) { |
1318 | DefKind::AssocConst => (ty::AssocKind::Const, false), | |
1319 | DefKind::AssocFn => (ty::AssocKind::Fn, self.get_fn_has_self_parameter(id, sess)), | |
1320 | DefKind::AssocTy => (ty::AssocKind::Type, false), | |
f2b60f7d | 1321 | _ => bug!("cannot get associated-item of `{:?}`", self.def_key(id)), |
8bb4bdeb | 1322 | }; |
f2b60f7d | 1323 | let container = self.root.tables.assoc_container.get(self, id).unwrap(); |
353b0b11 FG |
1324 | let opt_rpitit_info = |
1325 | self.root.tables.opt_rpitit_info.get(self, id).map(|d| d.decode(self)); | |
8bb4bdeb | 1326 | |
dc9dc135 | 1327 | ty::AssocItem { |
5e7ed085 | 1328 | name, |
3b2f2976 | 1329 | kind, |
8bb4bdeb | 1330 | def_id: self.local_def_id(id), |
5099ac24 | 1331 | trait_item_def_id: self.get_trait_item_def_id(id), |
064997fb | 1332 | container, |
ba9703b0 | 1333 | fn_has_self_parameter: has_self, |
353b0b11 | 1334 | opt_rpitit_info, |
8bb4bdeb | 1335 | } |
9e0c209e | 1336 | } |
223e47cc | 1337 | |
487cf647 | 1338 | fn get_ctor(self, node_id: DefIndex) -> Option<(CtorKind, DefId)> { |
f2b60f7d FG |
1339 | match self.def_kind(node_id) { |
1340 | DefKind::Struct | DefKind::Variant => { | |
1341 | let vdata = self.root.tables.variant_data.get(self, node_id).unwrap().decode(self); | |
487cf647 | 1342 | vdata.ctor.map(|(kind, index)| (kind, self.local_def_id(index))) |
9e0c209e | 1343 | } |
c30ab7b3 | 1344 | _ => None, |
9e0c209e | 1345 | } |
223e47cc LB |
1346 | } |
1347 | ||
fc512014 | 1348 | fn get_item_attrs( |
5099ac24 | 1349 | self, |
a2a8927a | 1350 | id: DefIndex, |
fc512014 XL |
1351 | sess: &'a Session, |
1352 | ) -> impl Iterator<Item = ast::Attribute> + 'a { | |
ba9703b0 XL |
1353 | self.root |
1354 | .tables | |
1355 | .attributes | |
a2a8927a XL |
1356 | .get(self, id) |
1357 | .unwrap_or_else(|| { | |
1358 | // Structure and variant constructors don't have any attributes encoded for them, | |
1359 | // but we assume that someone passing a constructor ID actually wants to look at | |
1360 | // the attributes on the corresponding struct or variant. | |
1361 | let def_key = self.def_key(id); | |
1362 | assert_eq!(def_key.disambiguated_data.data, DefPathData::Ctor); | |
1363 | let parent_id = def_key.parent.expect("no parent for a constructor"); | |
1364 | self.root | |
1365 | .tables | |
1366 | .attributes | |
1367 | .get(self, parent_id) | |
1368 | .expect("no encoded attributes for a structure or variant") | |
1369 | }) | |
ba9703b0 | 1370 | .decode((self, sess)) |
9e0c209e | 1371 | } |
223e47cc | 1372 | |
60c5eb7d | 1373 | fn get_inherent_implementations_for_type( |
5099ac24 | 1374 | self, |
dc9dc135 XL |
1375 | tcx: TyCtxt<'tcx>, |
1376 | id: DefIndex, | |
1377 | ) -> &'tcx [DefId] { | |
e74abb32 | 1378 | tcx.arena.alloc_from_iter( |
dfeec247 | 1379 | self.root |
ba9703b0 | 1380 | .tables |
dfeec247 XL |
1381 | .inherent_impls |
1382 | .get(self, id) | |
e74abb32 | 1383 | .decode(self) |
dfeec247 | 1384 | .map(|index| self.local_def_id(index)), |
e74abb32 | 1385 | ) |
9e0c209e | 1386 | } |
223e47cc | 1387 | |
5099ac24 FG |
1388 | /// Decodes all traits in the crate (for rustdoc and rustc diagnostics). |
1389 | fn get_traits(self) -> impl Iterator<Item = DefId> + 'a { | |
1390 | self.root.traits.decode(self).map(move |index| self.local_def_id(index)) | |
1391 | } | |
1392 | ||
1393 | /// Decodes all trait impls in the crate (for rustdoc). | |
9ffffee4 FG |
1394 | fn get_trait_impls(self) -> impl Iterator<Item = DefId> + 'a { |
1395 | self.cdata.trait_impls.values().flat_map(move |impls| { | |
1396 | impls.decode(self).map(move |(impl_index, _)| self.local_def_id(impl_index)) | |
a2a8927a XL |
1397 | }) |
1398 | } | |
1399 | ||
5e7ed085 FG |
1400 | fn get_incoherent_impls(self, tcx: TyCtxt<'tcx>, simp: SimplifiedType) -> &'tcx [DefId] { |
1401 | if let Some(impls) = self.cdata.incoherent_impls.get(&simp) { | |
1402 | tcx.arena.alloc_from_iter(impls.decode(self).map(|idx| self.local_def_id(idx))) | |
1403 | } else { | |
1404 | &[] | |
1405 | } | |
1406 | } | |
1407 | ||
a2a8927a | 1408 | fn get_implementations_of_trait( |
5099ac24 | 1409 | self, |
dc9dc135 | 1410 | tcx: TyCtxt<'tcx>, |
a2a8927a XL |
1411 | trait_def_id: DefId, |
1412 | ) -> &'tcx [(DefId, Option<SimplifiedType>)] { | |
5099ac24 | 1413 | if self.trait_impls.is_empty() { |
dfeec247 | 1414 | return &[]; |
b7449926 XL |
1415 | } |
1416 | ||
a2a8927a XL |
1417 | // Do a reverse lookup beforehand to avoid touching the crate_num |
1418 | // hash map in the loop below. | |
1419 | let key = match self.reverse_translate_def_id(trait_def_id) { | |
1420 | Some(def_id) => (def_id.krate.as_u32(), def_id.index), | |
1421 | None => return &[], | |
1422 | }; | |
223e47cc | 1423 | |
a2a8927a XL |
1424 | if let Some(impls) = self.trait_impls.get(&key) { |
1425 | tcx.arena.alloc_from_iter( | |
3dfed10e XL |
1426 | impls |
1427 | .decode(self) | |
a2a8927a XL |
1428 | .map(|(idx, simplified_self_ty)| (self.local_def_id(idx), simplified_self_ty)), |
1429 | ) | |
1430 | } else { | |
1431 | &[] | |
9e0c209e SL |
1432 | } |
1433 | } | |
223e47cc | 1434 | |
5099ac24 FG |
1435 | fn get_native_libraries(self, sess: &'a Session) -> impl Iterator<Item = NativeLib> + 'a { |
1436 | self.root.native_libraries.decode((self, sess)) | |
223e47cc LB |
1437 | } |
1438 | ||
5099ac24 | 1439 | fn get_proc_macro_quoted_span(self, index: usize, sess: &Session) -> Span { |
17df50a5 XL |
1440 | self.root |
1441 | .tables | |
1442 | .proc_macro_quoted_spans | |
1443 | .get(self, index) | |
9c376795 | 1444 | .unwrap_or_else(|| panic!("Missing proc macro quoted span: {index:?}")) |
17df50a5 XL |
1445 | .decode((self, sess)) |
1446 | } | |
1447 | ||
5099ac24 FG |
1448 | fn get_foreign_modules(self, sess: &'a Session) -> impl Iterator<Item = ForeignModule> + '_ { |
1449 | self.root.foreign_modules.decode((self, sess)) | |
0531ce1d XL |
1450 | } |
1451 | ||
60c5eb7d | 1452 | fn get_dylib_dependency_formats( |
5099ac24 | 1453 | self, |
dc9dc135 XL |
1454 | tcx: TyCtxt<'tcx>, |
1455 | ) -> &'tcx [(CrateNum, LinkagePreference)] { | |
dfeec247 XL |
1456 | tcx.arena.alloc_from_iter( |
1457 | self.root.dylib_dependency_formats.decode(self).enumerate().flat_map(|(i, link)| { | |
c30ab7b3 | 1458 | let cnum = CrateNum::new(i + 1); |
94b46f34 | 1459 | link.map(|link| (self.cnum_map[cnum], link)) |
dfeec247 XL |
1460 | }), |
1461 | ) | |
223e47cc | 1462 | } |
223e47cc | 1463 | |
487cf647 | 1464 | fn get_missing_lang_items(self, tcx: TyCtxt<'tcx>) -> &'tcx [LangItem] { |
5099ac24 | 1465 | tcx.arena.alloc_from_iter(self.root.lang_items_missing.decode(self)) |
d9579d0f AL |
1466 | } |
1467 | ||
60c5eb7d | 1468 | fn exported_symbols( |
5099ac24 | 1469 | self, |
dc9dc135 | 1470 | tcx: TyCtxt<'tcx>, |
04454e1e | 1471 | ) -> &'tcx [(ExportedSymbol<'tcx>, SymbolExportInfo)] { |
5099ac24 | 1472 | tcx.arena.alloc_from_iter(self.root.exported_symbols.decode((self, tcx))) |
83c7162d XL |
1473 | } |
1474 | ||
5e7ed085 | 1475 | fn get_macro(self, id: DefIndex, sess: &Session) -> ast::MacroDef { |
f2b60f7d FG |
1476 | match self.def_kind(id) { |
1477 | DefKind::Macro(_) => { | |
9ffffee4 | 1478 | let macro_rules = self.root.tables.is_macro_rules.get(self, id); |
f2b60f7d FG |
1479 | let body = |
1480 | self.root.tables.macro_definition.get(self, id).unwrap().decode((self, sess)); | |
1481 | ast::MacroDef { macro_rules, body: ast::ptr::P(body) } | |
5e7ed085 | 1482 | } |
476ff2be SL |
1483 | _ => bug!(), |
1484 | } | |
9e0c209e | 1485 | } |
9cc50fc6 | 1486 | |
cc61c64b | 1487 | #[inline] |
5099ac24 | 1488 | fn def_key(self, index: DefIndex) -> DefKey { |
fc512014 XL |
1489 | *self |
1490 | .def_key_cache | |
1491 | .lock() | |
1492 | .entry(index) | |
1493 | .or_insert_with(|| self.root.tables.def_keys.get(self, index).unwrap().decode(self)) | |
1494 | } | |
1495 | ||
32a655c1 | 1496 | // Returns the path leading to the thing with this `id`. |
5099ac24 | 1497 | fn def_path(self, id: DefIndex) -> DefPath { |
b7449926 | 1498 | debug!("def_path(cnum={:?}, id={:?})", self.cnum, id); |
e1599b0c | 1499 | DefPath::make(self.cnum, id, |parent| self.def_key(parent)) |
92a42be0 | 1500 | } |
92a42be0 | 1501 | |
3dfed10e | 1502 | #[inline] |
5099ac24 | 1503 | fn def_path_hash(self, index: DefIndex) -> DefPathHash { |
c0240ec0 FG |
1504 | // This is a hack to workaround the fact that we can't easily encode/decode a Hash64 |
1505 | // into the FixedSizeEncoding, as Hash64 lacks a Default impl. A future refactor to | |
1506 | // relax the Default restriction will likely fix this. | |
1507 | let fingerprint = Fingerprint::new( | |
1508 | self.root.stable_crate_id.as_u64(), | |
1509 | self.root.tables.def_path_hashes.get(self, index), | |
1510 | ); | |
1511 | DefPathHash::new(self.root.stable_crate_id, fingerprint.split().1) | |
3dfed10e XL |
1512 | } |
1513 | ||
c295e0f8 | 1514 | #[inline] |
5099ac24 | 1515 | fn def_path_hash_to_def_index(self, hash: DefPathHash) -> DefIndex { |
c295e0f8 XL |
1516 | self.def_path_hash_map.def_path_hash_to_def_index(&hash) |
1517 | } | |
1518 | ||
5099ac24 | 1519 | fn expn_hash_to_expn_id(self, sess: &Session, index_guess: u32, hash: ExpnHash) -> ExpnId { |
136023e0 XL |
1520 | debug_assert_eq!(ExpnId::from_hash(hash), None); |
1521 | let index_guess = ExpnIndex::from_u32(index_guess); | |
1522 | let old_hash = self.root.expn_hashes.get(self, index_guess).map(|lazy| lazy.decode(self)); | |
1523 | ||
1524 | let index = if old_hash == Some(hash) { | |
1525 | // Fast path: the expn and its index is unchanged from the | |
1526 | // previous compilation session. There is no need to decode anything | |
1527 | // else. | |
1528 | index_guess | |
1529 | } else { | |
1530 | // Slow path: We need to find out the new `DefIndex` of the provided | |
1531 | // `DefPathHash`, if its still exists. This requires decoding every `DefPathHash` | |
1532 | // stored in this crate. | |
1533 | let map = self.cdata.expn_hash_map.get_or_init(|| { | |
1534 | let end_id = self.root.expn_hashes.size() as u32; | |
1535 | let mut map = | |
1536 | UnhashMap::with_capacity_and_hasher(end_id as usize, Default::default()); | |
1537 | for i in 0..end_id { | |
1538 | let i = ExpnIndex::from_u32(i); | |
1539 | if let Some(hash) = self.root.expn_hashes.get(self, i) { | |
1540 | map.insert(hash.decode(self), i); | |
136023e0 XL |
1541 | } |
1542 | } | |
1543 | map | |
1544 | }); | |
1545 | map[&hash] | |
1546 | }; | |
1547 | ||
c295e0f8 | 1548 | let data = self.root.expn_data.get(self, index).unwrap().decode((self, sess)); |
136023e0 XL |
1549 | rustc_span::hygiene::register_expn_id(self.cnum, index, data, hash) |
1550 | } | |
1551 | ||
b7449926 | 1552 | /// Imports the source_map from an external crate into the source_map of the crate |
9e0c209e SL |
1553 | /// currently being compiled (the "local crate"). |
1554 | /// | |
1555 | /// The import algorithm works analogous to how AST items are inlined from an | |
1556 | /// external crate's metadata: | |
b7449926 XL |
1557 | /// For every SourceFile in the external source_map an 'inline' copy is created in the |
1558 | /// local source_map. The correspondence relation between external and local | |
1559 | /// SourceFiles is recorded in the `ImportedSourceFile` objects returned from this | |
9e0c209e SL |
1560 | /// function. When an item from an external crate is later inlined into this |
1561 | /// crate, this correspondence information is used to translate the span | |
1562 | /// information of the inlined item so that it refers the correct positions in | |
b7449926 | 1563 | /// the local source_map (see `<decoder::DecodeContext as SpecializedDecoder<Span>>`). |
9e0c209e | 1564 | /// |
b7449926 XL |
1565 | /// The import algorithm in the function below will reuse SourceFiles already |
1566 | /// existing in the local source_map. For example, even if the SourceFile of some | |
9e0c209e | 1567 | /// source file of libstd gets imported many times, there will only ever be |
b7449926 | 1568 | /// one SourceFile object for the corresponding file in the local source_map. |
9e0c209e | 1569 | /// |
b7449926 | 1570 | /// Note that imported SourceFiles do not actually contain the source code of the |
9e0c209e SL |
1571 | /// file they represent, just information about length, line breaks, and |
1572 | /// multibyte characters. This information is enough to generate valid debuginfo | |
1573 | /// for items inlined from other crates. | |
b7449926 XL |
1574 | /// |
1575 | /// Proc macro crates don't currently export spans, so this function does not have | |
1576 | /// to work for them. | |
f2b60f7d | 1577 | fn imported_source_file(self, source_file_index: u32, sess: &Session) -> ImportedSourceFile { |
064997fb FG |
1578 | fn filter<'a>(sess: &Session, path: Option<&'a Path>) -> Option<&'a Path> { |
1579 | path.filter(|_| { | |
ba9703b0 | 1580 | // Only spend time on further checks if we have what to translate *to*. |
cdc7bbd5 | 1581 | sess.opts.real_rust_source_base_dir.is_some() |
064997fb FG |
1582 | // Some tests need the translation to be always skipped. |
1583 | && sess.opts.unstable_opts.translate_remapped_path_to_local_path | |
ba9703b0 XL |
1584 | }) |
1585 | .filter(|virtual_dir| { | |
1586 | // Don't translate away `/rustc/$hash` if we're still remapping to it, | |
1587 | // since that means we're still building `std`/`rustc` that need it, | |
1588 | // and we don't want the real path to leak into codegen/debuginfo. | |
1589 | !sess.opts.remap_path_prefix.iter().any(|(_from, to)| to == virtual_dir) | |
064997fb FG |
1590 | }) |
1591 | } | |
1592 | ||
1593 | // Translate the virtual `/rustc/$hash` prefix back to a real directory | |
1594 | // that should hold actual sources, where possible. | |
1595 | // | |
1596 | // NOTE: if you update this, you might need to also update bootstrap's code for generating | |
1597 | // the `rust-src` component in `Src::run` in `src/bootstrap/dist.rs`. | |
1598 | let virtual_rust_source_base_dir = [ | |
1599 | filter(sess, option_env!("CFG_VIRTUAL_RUST_SOURCE_BASE_DIR").map(Path::new)), | |
1600 | filter(sess, sess.opts.unstable_opts.simulate_remapped_rust_src_base.as_deref()), | |
1601 | ]; | |
1602 | ||
ba9703b0 XL |
1603 | let try_to_translate_virtual_to_real = |name: &mut rustc_span::FileName| { |
1604 | debug!( | |
1605 | "try_to_translate_virtual_to_real(name={:?}): \ | |
1606 | virtual_rust_source_base_dir={:?}, real_rust_source_base_dir={:?}", | |
cdc7bbd5 | 1607 | name, virtual_rust_source_base_dir, sess.opts.real_rust_source_base_dir, |
ba9703b0 XL |
1608 | ); |
1609 | ||
064997fb | 1610 | for virtual_dir in virtual_rust_source_base_dir.iter().flatten() { |
cdc7bbd5 | 1611 | if let Some(real_dir) = &sess.opts.real_rust_source_base_dir { |
ba9703b0 | 1612 | if let rustc_span::FileName::Real(old_name) = name { |
17df50a5 XL |
1613 | if let rustc_span::RealFileName::Remapped { local_path: _, virtual_name } = |
1614 | old_name | |
1615 | { | |
1616 | if let Ok(rest) = virtual_name.strip_prefix(virtual_dir) { | |
1617 | let virtual_name = virtual_name.clone(); | |
3dfed10e XL |
1618 | |
1619 | // The std library crates are in | |
1620 | // `$sysroot/lib/rustlib/src/rust/library`, whereas other crates | |
1621 | // may be in `$sysroot/lib/rustlib/src/rust/` directly. So we | |
1622 | // detect crates from the std libs and handle them specially. | |
1623 | const STD_LIBS: &[&str] = &[ | |
1624 | "core", | |
1625 | "alloc", | |
1626 | "std", | |
1627 | "test", | |
1628 | "term", | |
1629 | "unwind", | |
1630 | "proc_macro", | |
1631 | "panic_abort", | |
1632 | "panic_unwind", | |
1633 | "profiler_builtins", | |
1634 | "rtstartup", | |
1635 | "rustc-std-workspace-core", | |
1636 | "rustc-std-workspace-alloc", | |
1637 | "rustc-std-workspace-std", | |
1638 | "backtrace", | |
1639 | ]; | |
1640 | let is_std_lib = STD_LIBS.iter().any(|l| rest.starts_with(l)); | |
1641 | ||
1642 | let new_path = if is_std_lib { | |
1643 | real_dir.join("library").join(rest) | |
1644 | } else { | |
1645 | real_dir.join(rest) | |
1646 | }; | |
1647 | ||
ba9703b0 XL |
1648 | debug!( |
1649 | "try_to_translate_virtual_to_real: `{}` -> `{}`", | |
1650 | virtual_name.display(), | |
1651 | new_path.display(), | |
1652 | ); | |
17df50a5 XL |
1653 | let new_name = rustc_span::RealFileName::Remapped { |
1654 | local_path: Some(new_path), | |
ba9703b0 XL |
1655 | virtual_name, |
1656 | }; | |
1657 | *old_name = new_name; | |
1658 | } | |
1659 | } | |
1660 | } | |
1661 | } | |
1662 | } | |
1663 | }; | |
1664 | ||
f2b60f7d FG |
1665 | let mut import_info = self.cdata.source_map_import_info.lock(); |
1666 | for _ in import_info.len()..=(source_file_index as usize) { | |
1667 | import_info.push(None); | |
1668 | } | |
1669 | import_info[source_file_index as usize] | |
1670 | .get_or_insert_with(|| { | |
1671 | let source_file_to_import = self | |
1672 | .root | |
1673 | .source_map | |
1674 | .get(self, source_file_index) | |
1675 | .expect("missing source file") | |
1676 | .decode(self); | |
1677 | ||
1678 | // We can't reuse an existing SourceFile, so allocate a new one | |
1679 | // containing the information we need. | |
781aab86 | 1680 | let original_end_pos = source_file_to_import.end_position(); |
f2b60f7d FG |
1681 | let rustc_span::SourceFile { |
1682 | mut name, | |
1683 | src_hash, | |
781aab86 FG |
1684 | start_pos: original_start_pos, |
1685 | source_len, | |
f2b60f7d FG |
1686 | lines, |
1687 | multibyte_chars, | |
1688 | non_narrow_chars, | |
1689 | normalized_pos, | |
c0240ec0 | 1690 | stable_id, |
f2b60f7d FG |
1691 | .. |
1692 | } = source_file_to_import; | |
1693 | ||
49aad941 FG |
1694 | // If this file is under $sysroot/lib/rustlib/src/ |
1695 | // and the user wish to simulate remapping with -Z simulate-remapped-rust-src-base, | |
f2b60f7d FG |
1696 | // then we change `name` to a similar state as if the rust was bootstrapped |
1697 | // with `remap-debuginfo = true`. | |
1698 | // This is useful for testing so that tests about the effects of | |
1699 | // `try_to_translate_virtual_to_real` don't have to worry about how the | |
1700 | // compiler is bootstrapped. | |
1701 | if let Some(virtual_dir) = &sess.opts.unstable_opts.simulate_remapped_rust_src_base | |
ed00b5ec FG |
1702 | && let Some(real_dir) = &sess.opts.real_rust_source_base_dir |
1703 | && let rustc_span::FileName::Real(ref mut old_name) = name | |
1704 | { | |
49aad941 | 1705 | let relative_path = match old_name { |
ed00b5ec FG |
1706 | rustc_span::RealFileName::LocalPath(local) => { |
1707 | local.strip_prefix(real_dir).ok() | |
1708 | } | |
49aad941 | 1709 | rustc_span::RealFileName::Remapped { virtual_name, .. } => { |
ed00b5ec FG |
1710 | option_env!("CFG_VIRTUAL_RUST_SOURCE_BASE_DIR") |
1711 | .and_then(|virtual_dir| virtual_name.strip_prefix(virtual_dir).ok()) | |
49aad941 FG |
1712 | } |
1713 | }; | |
1714 | debug!(?relative_path, ?virtual_dir, "simulate_remapped_rust_src_base"); | |
1715 | for subdir in ["library", "compiler"] { | |
ed00b5ec FG |
1716 | if let Some(rest) = relative_path.and_then(|p| p.strip_prefix(subdir).ok()) |
1717 | { | |
49aad941 FG |
1718 | *old_name = rustc_span::RealFileName::Remapped { |
1719 | local_path: None, // FIXME: maybe we should preserve this? | |
1720 | virtual_name: virtual_dir.join(subdir).join(rest), | |
1721 | }; | |
1722 | break; | |
17df50a5 XL |
1723 | } |
1724 | } | |
f2b60f7d | 1725 | } |
17df50a5 | 1726 | |
f2b60f7d FG |
1727 | // If this file's path has been remapped to `/rustc/$hash`, |
1728 | // we might be able to reverse that (also see comments above, | |
1729 | // on `try_to_translate_virtual_to_real`). | |
1730 | try_to_translate_virtual_to_real(&mut name); | |
1731 | ||
f2b60f7d FG |
1732 | let local_version = sess.source_map().new_imported_source_file( |
1733 | name, | |
1734 | src_hash, | |
c0240ec0 | 1735 | stable_id, |
781aab86 | 1736 | source_len.to_u32(), |
f2b60f7d FG |
1737 | self.cnum, |
1738 | lines, | |
1739 | multibyte_chars, | |
1740 | non_narrow_chars, | |
1741 | normalized_pos, | |
f2b60f7d FG |
1742 | source_file_index, |
1743 | ); | |
1744 | debug!( | |
1745 | "CrateMetaData::imported_source_files alloc \ | |
781aab86 FG |
1746 | source_file {:?} original (start_pos {:?} source_len {:?}) \ |
1747 | translated (start_pos {:?} source_len {:?})", | |
f2b60f7d | 1748 | local_version.name, |
781aab86 FG |
1749 | original_start_pos, |
1750 | source_len, | |
f2b60f7d | 1751 | local_version.start_pos, |
781aab86 | 1752 | local_version.source_len |
f2b60f7d | 1753 | ); |
e74abb32 | 1754 | |
f2b60f7d | 1755 | ImportedSourceFile { |
781aab86 FG |
1756 | original_start_pos, |
1757 | original_end_pos, | |
f2b60f7d FG |
1758 | translated_source_file: local_version, |
1759 | } | |
1760 | }) | |
1761 | .clone() | |
e74abb32 | 1762 | } |
04454e1e | 1763 | |
9ffffee4 FG |
1764 | fn get_attr_flags(self, index: DefIndex) -> AttrFlags { |
1765 | self.root.tables.attr_flags.get(self, index) | |
04454e1e | 1766 | } |
923072b8 | 1767 | |
c620b35d FG |
1768 | fn get_intrinsic(self, index: DefIndex) -> Option<ty::IntrinsicDef> { |
1769 | self.root.tables.intrinsic.get(self, index).map(|d| d.decode(self)) | |
9ffffee4 FG |
1770 | } |
1771 | ||
1772 | fn get_doc_link_resolutions(self, index: DefIndex) -> DocLinkResMap { | |
1773 | self.root | |
1774 | .tables | |
1775 | .doc_link_resolutions | |
1776 | .get(self, index) | |
1777 | .expect("no resolutions for a doc link") | |
1778 | .decode(self) | |
1779 | } | |
1780 | ||
1781 | fn get_doc_link_traits_in_scope(self, index: DefIndex) -> impl Iterator<Item = DefId> + 'a { | |
1782 | self.root | |
1783 | .tables | |
1784 | .doc_link_traits_in_scope | |
1785 | .get(self, index) | |
1786 | .expect("no traits in scope for a doc link") | |
1787 | .decode(self) | |
923072b8 | 1788 | } |
74b04a01 | 1789 | } |
0531ce1d | 1790 | |
74b04a01 | 1791 | impl CrateMetadata { |
923072b8 | 1792 | pub(crate) fn new( |
74b04a01 | 1793 | sess: &Session, |
04454e1e | 1794 | cstore: &CStore, |
74b04a01 | 1795 | blob: MetadataBlob, |
923072b8 | 1796 | root: CrateRoot, |
74b04a01 XL |
1797 | raw_proc_macros: Option<&'static [ProcMacro]>, |
1798 | cnum: CrateNum, | |
1799 | cnum_map: CrateNumMap, | |
3dfed10e | 1800 | dep_kind: CrateDepKind, |
74b04a01 XL |
1801 | source: CrateSource, |
1802 | private_dep: bool, | |
1803 | host_hash: Option<Svh>, | |
1804 | ) -> CrateMetadata { | |
74b04a01 XL |
1805 | let trait_impls = root |
1806 | .impls | |
1807 | .decode((&blob, sess)) | |
1808 | .map(|trait_impls| (trait_impls.trait_id, trait_impls.impls)) | |
1809 | .collect(); | |
1810 | let alloc_decoding_state = | |
1811 | AllocDecodingState::new(root.interpret_alloc_index.decode(&blob).collect()); | |
353b0b11 | 1812 | let dependencies = cnum_map.iter().copied().collect(); |
c295e0f8 XL |
1813 | |
1814 | // Pre-decode the DefPathHash->DefIndex table. This is a cheap operation | |
1815 | // that does not copy any data. It just does some data verification. | |
1816 | let def_path_hash_map = root.def_path_hash_map.decode(&blob); | |
1817 | ||
04454e1e | 1818 | let mut cdata = CrateMetadata { |
74b04a01 XL |
1819 | blob, |
1820 | root, | |
74b04a01 | 1821 | trait_impls, |
04454e1e | 1822 | incoherent_impls: Default::default(), |
74b04a01 | 1823 | raw_proc_macros, |
f2b60f7d | 1824 | source_map_import_info: Lock::new(Vec::new()), |
c295e0f8 | 1825 | def_path_hash_map, |
136023e0 | 1826 | expn_hash_map: Default::default(), |
74b04a01 | 1827 | alloc_decoding_state, |
74b04a01 XL |
1828 | cnum, |
1829 | cnum_map, | |
1830 | dependencies, | |
c0240ec0 | 1831 | dep_kind, |
5099ac24 | 1832 | source: Lrc::new(source), |
c0240ec0 | 1833 | private_dep, |
74b04a01 | 1834 | host_hash, |
c620b35d | 1835 | used: false, |
c0240ec0 | 1836 | extern_crate: None, |
3dfed10e XL |
1837 | hygiene_context: Default::default(), |
1838 | def_key_cache: Default::default(), | |
04454e1e FG |
1839 | }; |
1840 | ||
1841 | // Need `CrateMetadataRef` to decode `DefId`s in simplified types. | |
1842 | cdata.incoherent_impls = cdata | |
1843 | .root | |
1844 | .incoherent_impls | |
1845 | .decode(CrateMetadataRef { cdata: &cdata, cstore }) | |
1846 | .map(|incoherent_impls| (incoherent_impls.self_ty, incoherent_impls.impls)) | |
1847 | .collect(); | |
1848 | ||
1849 | cdata | |
b039eaaf | 1850 | } |
60c5eb7d | 1851 | |
353b0b11 | 1852 | pub(crate) fn dependencies(&self) -> impl Iterator<Item = CrateNum> + '_ { |
c0240ec0 | 1853 | self.dependencies.iter().copied() |
60c5eb7d XL |
1854 | } |
1855 | ||
c0240ec0 | 1856 | pub(crate) fn add_dependency(&mut self, cnum: CrateNum) { |
353b0b11 | 1857 | self.dependencies.push(cnum); |
60c5eb7d XL |
1858 | } |
1859 | ||
c0240ec0 FG |
1860 | pub(crate) fn update_extern_crate(&mut self, new_extern_crate: ExternCrate) -> bool { |
1861 | let update = | |
1862 | Some(new_extern_crate.rank()) > self.extern_crate.as_ref().map(ExternCrate::rank); | |
60c5eb7d | 1863 | if update { |
c0240ec0 | 1864 | self.extern_crate = Some(new_extern_crate); |
60c5eb7d XL |
1865 | } |
1866 | update | |
1867 | } | |
1868 | ||
923072b8 | 1869 | pub(crate) fn source(&self) -> &CrateSource { |
5099ac24 | 1870 | &*self.source |
60c5eb7d XL |
1871 | } |
1872 | ||
923072b8 | 1873 | pub(crate) fn dep_kind(&self) -> CrateDepKind { |
c0240ec0 | 1874 | self.dep_kind |
60c5eb7d XL |
1875 | } |
1876 | ||
c0240ec0 FG |
1877 | pub(crate) fn set_dep_kind(&mut self, dep_kind: CrateDepKind) { |
1878 | self.dep_kind = dep_kind; | |
60c5eb7d XL |
1879 | } |
1880 | ||
c0240ec0 FG |
1881 | pub(crate) fn update_and_private_dep(&mut self, private_dep: bool) { |
1882 | self.private_dep &= private_dep; | |
fe692bf9 FG |
1883 | } |
1884 | ||
c620b35d FG |
1885 | pub(crate) fn used(&self) -> bool { |
1886 | self.used | |
1887 | } | |
1888 | ||
064997fb FG |
1889 | pub(crate) fn required_panic_strategy(&self) -> Option<PanicStrategy> { |
1890 | self.root.required_panic_strategy | |
60c5eb7d XL |
1891 | } |
1892 | ||
923072b8 | 1893 | pub(crate) fn needs_panic_runtime(&self) -> bool { |
60c5eb7d XL |
1894 | self.root.needs_panic_runtime |
1895 | } | |
1896 | ||
923072b8 | 1897 | pub(crate) fn is_panic_runtime(&self) -> bool { |
60c5eb7d XL |
1898 | self.root.panic_runtime |
1899 | } | |
1900 | ||
923072b8 | 1901 | pub(crate) fn is_profiler_runtime(&self) -> bool { |
60c5eb7d XL |
1902 | self.root.profiler_runtime |
1903 | } | |
1904 | ||
923072b8 | 1905 | pub(crate) fn needs_allocator(&self) -> bool { |
60c5eb7d XL |
1906 | self.root.needs_allocator |
1907 | } | |
1908 | ||
923072b8 | 1909 | pub(crate) fn has_global_allocator(&self) -> bool { |
60c5eb7d XL |
1910 | self.root.has_global_allocator |
1911 | } | |
1912 | ||
487cf647 FG |
1913 | pub(crate) fn has_alloc_error_handler(&self) -> bool { |
1914 | self.root.has_alloc_error_handler | |
1915 | } | |
1916 | ||
923072b8 | 1917 | pub(crate) fn has_default_lib_allocator(&self) -> bool { |
60c5eb7d XL |
1918 | self.root.has_default_lib_allocator |
1919 | } | |
1920 | ||
923072b8 | 1921 | pub(crate) fn is_proc_macro_crate(&self) -> bool { |
60c5eb7d XL |
1922 | self.root.is_proc_macro_crate() |
1923 | } | |
1924 | ||
923072b8 | 1925 | pub(crate) fn name(&self) -> Symbol { |
fe692bf9 | 1926 | self.root.header.name |
60c5eb7d XL |
1927 | } |
1928 | ||
923072b8 | 1929 | pub(crate) fn hash(&self) -> Svh { |
fe692bf9 | 1930 | self.root.header.hash |
60c5eb7d | 1931 | } |
74b04a01 | 1932 | |
3dfed10e XL |
1933 | fn num_def_ids(&self) -> usize { |
1934 | self.root.tables.def_keys.size() | |
1935 | } | |
1936 | ||
74b04a01 XL |
1937 | fn local_def_id(&self, index: DefIndex) -> DefId { |
1938 | DefId { krate: self.cnum, index } | |
1939 | } | |
1940 | ||
1941 | // Translate a DefId from the current compilation environment to a DefId | |
1942 | // for an external crate. | |
1943 | fn reverse_translate_def_id(&self, did: DefId) -> Option<DefId> { | |
1944 | for (local, &global) in self.cnum_map.iter_enumerated() { | |
1945 | if global == did.krate { | |
1946 | return Some(DefId { krate: local, index: did.index }); | |
1947 | } | |
1948 | } | |
1949 | ||
1950 | None | |
1951 | } | |
a7813a04 | 1952 | } |