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Encode ExpnId using ExpnHash for incr. comp.
This commit is contained in:
parent
2fe37c5bd1
commit
37a13def48
@ -79,6 +79,8 @@ crate struct CrateMetadata {
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/// `DefIndex`. See `raw_def_id_to_def_id` for more details about how
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/// this is used.
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def_path_hash_map: OnceCell<UnhashMap<DefPathHash, DefIndex>>,
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/// Likewise for ExpnHash.
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expn_hash_map: OnceCell<UnhashMap<ExpnHash, ExpnIndex>>,
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/// Used for decoding interpret::AllocIds in a cached & thread-safe manner.
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alloc_decoding_state: AllocDecodingState,
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/// Caches decoded `DefKey`s.
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@ -1619,6 +1621,41 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
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self.def_path_hash_unlocked(index, &mut def_path_hashes)
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}
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fn expn_hash_to_expn_id(&self, index_guess: u32, hash: ExpnHash) -> ExpnId {
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debug_assert_eq!(ExpnId::from_hash(hash), None);
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let index_guess = ExpnIndex::from_u32(index_guess);
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let old_hash = self.root.expn_hashes.get(self, index_guess).map(|lazy| lazy.decode(self));
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let index = if old_hash == Some(hash) {
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// Fast path: the expn and its index is unchanged from the
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// previous compilation session. There is no need to decode anything
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// else.
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index_guess
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} else {
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// Slow path: We need to find out the new `DefIndex` of the provided
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// `DefPathHash`, if its still exists. This requires decoding every `DefPathHash`
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// stored in this crate.
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let map = self.cdata.expn_hash_map.get_or_init(|| {
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let end_id = self.root.expn_hashes.size() as u32;
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let mut map =
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UnhashMap::with_capacity_and_hasher(end_id as usize, Default::default());
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for i in 0..end_id {
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let i = ExpnIndex::from_u32(i);
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if let Some(hash) = self.root.expn_hashes.get(self, i) {
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map.insert(hash.decode(self), i);
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} else {
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panic!("Missing expn_hash entry for {:?}", i);
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}
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}
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map
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});
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map[&hash]
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};
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let data = self.root.expn_data.get(self, index).unwrap().decode(self);
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rustc_span::hygiene::register_expn_id(data, hash)
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}
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/// Imports the source_map from an external crate into the source_map of the crate
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/// currently being compiled (the "local crate").
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///
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@ -1857,6 +1894,7 @@ impl CrateMetadata {
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raw_proc_macros,
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source_map_import_info: OnceCell::new(),
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def_path_hash_map: Default::default(),
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expn_hash_map: Default::default(),
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alloc_decoding_state,
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cnum,
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cnum_map,
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@ -18,7 +18,7 @@ use rustc_middle::ty::query::Providers;
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use rustc_middle::ty::{self, TyCtxt, Visibility};
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use rustc_session::utils::NativeLibKind;
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use rustc_session::{Session, StableCrateId};
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use rustc_span::hygiene::{ExpnData, ExpnHash, ExpnId};
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use rustc_span::hygiene::{ExpnHash, ExpnId};
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use rustc_span::source_map::{Span, Spanned};
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use rustc_span::symbol::Symbol;
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@ -494,23 +494,6 @@ impl CrateStore for CStore {
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fn as_any(&self) -> &dyn Any {
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self
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}
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fn decode_expn_data(&self, sess: &Session, expn_id: ExpnId) -> (ExpnData, ExpnHash) {
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let crate_data = self.get_crate_data(expn_id.krate);
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(
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crate_data
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.root
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.expn_data
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.get(&crate_data, expn_id.local_id)
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.unwrap()
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.decode((&crate_data, sess)),
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crate_data
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.root
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.expn_hashes
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.get(&crate_data, expn_id.local_id)
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.unwrap()
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.decode((&crate_data, sess)),
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)
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}
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fn crate_name(&self, cnum: CrateNum) -> Symbol {
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self.get_crate_data(cnum).root.name
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@ -545,6 +528,10 @@ impl CrateStore for CStore {
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self.get_crate_data(cnum).def_path_hash_to_def_id(cnum, index_guess, hash)
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}
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fn expn_hash_to_expn_id(&self, cnum: CrateNum, index_guess: u32, hash: ExpnHash) -> ExpnId {
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self.get_crate_data(cnum).expn_hash_to_expn_id(index_guess, hash)
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}
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fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata {
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encoder::encode_metadata(tcx)
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}
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@ -11,8 +11,7 @@ use rustc_hir::definitions::{DefKey, DefPath, DefPathHash};
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use rustc_macros::HashStable;
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use rustc_session::search_paths::PathKind;
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use rustc_session::utils::NativeLibKind;
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use rustc_session::Session;
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use rustc_span::hygiene::{ExpnData, ExpnHash, ExpnId};
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use rustc_span::hygiene::{ExpnHash, ExpnId};
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use rustc_span::symbol::Symbol;
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use rustc_span::Span;
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use rustc_target::spec::Target;
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@ -188,7 +187,6 @@ pub type MetadataLoaderDyn = dyn MetadataLoader + Sync;
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/// during resolve)
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pub trait CrateStore: std::fmt::Debug {
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fn as_any(&self) -> &dyn Any;
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fn decode_expn_data(&self, sess: &Session, expn_id: ExpnId) -> (ExpnData, ExpnHash);
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// Foreign definitions.
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// This information is safe to access, since it's hashed as part of the DefPathHash, which incr.
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@ -209,6 +207,7 @@ pub trait CrateStore: std::fmt::Debug {
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index_guess: u32,
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hash: DefPathHash,
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) -> Option<DefId>;
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fn expn_hash_to_expn_id(&self, cnum: CrateNum, index_guess: u32, hash: ExpnHash) -> ExpnId;
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// utility functions
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fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata;
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@ -83,7 +83,7 @@ pub struct OnDiskCache<'sess> {
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// `ExpnData` (e.g `ExpnData.krate` may not be `LOCAL_CRATE`). Alternatively,
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// we could look up the `ExpnData` from the metadata of foreign crates,
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// but it seemed easier to have `OnDiskCache` be independent of the `CStore`.
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expn_data: FxHashMap<u32, AbsoluteBytePos>,
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expn_data: UnhashMap<ExpnHash, AbsoluteBytePos>,
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// Additional information used when decoding hygiene data.
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hygiene_context: HygieneDecodeContext,
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// Maps `DefPathHash`es to their `RawDefId`s from the *previous*
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@ -91,6 +91,8 @@ pub struct OnDiskCache<'sess> {
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// we try to map a `DefPathHash` to its `DefId` in the current compilation
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// session.
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foreign_def_path_hashes: UnhashMap<DefPathHash, RawDefId>,
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// Likewise for ExpnId.
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foreign_expn_data: UnhashMap<ExpnHash, u32>,
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// The *next* compilation sessison's `foreign_def_path_hashes` - at
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// the end of our current compilation session, this will get written
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@ -118,8 +120,9 @@ struct Footer {
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// See `OnDiskCache.syntax_contexts`
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syntax_contexts: FxHashMap<u32, AbsoluteBytePos>,
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// See `OnDiskCache.expn_data`
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expn_data: FxHashMap<u32, AbsoluteBytePos>,
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expn_data: UnhashMap<ExpnHash, AbsoluteBytePos>,
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foreign_def_path_hashes: UnhashMap<DefPathHash, RawDefId>,
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foreign_expn_data: UnhashMap<ExpnHash, u32>,
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}
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pub type EncodedQueryResultIndex = Vec<(SerializedDepNodeIndex, AbsoluteBytePos)>;
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@ -217,6 +220,7 @@ impl<'sess> OnDiskCache<'sess> {
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alloc_decoding_state: AllocDecodingState::new(footer.interpret_alloc_index),
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syntax_contexts: footer.syntax_contexts,
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expn_data: footer.expn_data,
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foreign_expn_data: footer.foreign_expn_data,
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hygiene_context: Default::default(),
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foreign_def_path_hashes: footer.foreign_def_path_hashes,
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latest_foreign_def_path_hashes: Default::default(),
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@ -236,7 +240,8 @@ impl<'sess> OnDiskCache<'sess> {
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prev_diagnostics_index: Default::default(),
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alloc_decoding_state: AllocDecodingState::new(Vec::new()),
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syntax_contexts: FxHashMap::default(),
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expn_data: FxHashMap::default(),
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expn_data: UnhashMap::default(),
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foreign_expn_data: UnhashMap::default(),
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hygiene_context: Default::default(),
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foreign_def_path_hashes: Default::default(),
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latest_foreign_def_path_hashes: Default::default(),
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@ -350,7 +355,8 @@ impl<'sess> OnDiskCache<'sess> {
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};
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let mut syntax_contexts = FxHashMap::default();
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let mut expn_ids = FxHashMap::default();
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let mut expn_data = UnhashMap::default();
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let mut foreign_expn_data = UnhashMap::default();
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// Encode all hygiene data (`SyntaxContextData` and `ExpnData`) from the current
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// session.
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@ -363,13 +369,14 @@ impl<'sess> OnDiskCache<'sess> {
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syntax_contexts.insert(index, pos);
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Ok(())
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},
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|encoder, index, expn_data, hash| -> FileEncodeResult {
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if index.krate == LOCAL_CRATE {
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|encoder, expn_id, data, hash| -> FileEncodeResult {
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if expn_id.krate == LOCAL_CRATE {
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let pos = AbsoluteBytePos::new(encoder.position());
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encoder.encode_tagged(TAG_EXPN_DATA, &(expn_data, hash))?;
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expn_ids.insert(index.local_id.as_u32(), pos);
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encoder.encode_tagged(TAG_EXPN_DATA, &data)?;
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expn_data.insert(hash, pos);
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} else {
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foreign_expn_data.insert(hash, expn_id.local_id.as_u32());
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}
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// TODO Handle foreign expansions.
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Ok(())
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},
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)?;
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@ -387,7 +394,8 @@ impl<'sess> OnDiskCache<'sess> {
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diagnostics_index,
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interpret_alloc_index,
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syntax_contexts,
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expn_data: expn_ids,
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expn_data,
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foreign_expn_data,
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foreign_def_path_hashes,
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},
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)?;
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@ -549,6 +557,7 @@ impl<'sess> OnDiskCache<'sess> {
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alloc_decoding_session: self.alloc_decoding_state.new_decoding_session(),
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syntax_contexts: &self.syntax_contexts,
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expn_data: &self.expn_data,
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foreign_expn_data: &self.foreign_expn_data,
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hygiene_context: &self.hygiene_context,
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};
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f(&mut decoder)
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@ -643,7 +652,8 @@ pub struct CacheDecoder<'a, 'tcx> {
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file_index_to_stable_id: &'a FxHashMap<SourceFileIndex, EncodedSourceFileId>,
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alloc_decoding_session: AllocDecodingSession<'a>,
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syntax_contexts: &'a FxHashMap<u32, AbsoluteBytePos>,
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expn_data: &'a FxHashMap<u32, AbsoluteBytePos>,
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expn_data: &'a UnhashMap<ExpnHash, AbsoluteBytePos>,
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foreign_expn_data: &'a UnhashMap<ExpnHash, u32>,
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hygiene_context: &'a HygieneDecodeContext,
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}
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@ -794,27 +804,43 @@ impl<'a, 'tcx> Decodable<CacheDecoder<'a, 'tcx>> for SyntaxContext {
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impl<'a, 'tcx> Decodable<CacheDecoder<'a, 'tcx>> for ExpnId {
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fn decode(decoder: &mut CacheDecoder<'a, 'tcx>) -> Result<Self, String> {
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let krate = CrateNum::decode(decoder)?;
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let index = u32::decode(decoder)?;
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let hash = ExpnHash::decode(decoder)?;
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if hash.is_root() {
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return Ok(ExpnId::root());
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}
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let expn_data = decoder.expn_data;
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let tcx = decoder.tcx;
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rustc_span::hygiene::decode_expn_id_incrcomp(
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krate,
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index,
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decoder.hygiene_context,
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|index| -> Result<(ExpnData, ExpnHash), _> {
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// This closure is invoked if we haven't already decoded the data for the `ExpnId` we are deserializing.
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// We look up the position of the associated `ExpnData` and decode it.
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let pos = expn_data
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.get(&index)
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.unwrap_or_else(|| panic!("Bad index {:?} (map {:?})", index, expn_data));
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if let Some(expn_id) = ExpnId::from_hash(hash) {
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return Ok(expn_id);
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}
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decoder
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.with_position(pos.to_usize(), |decoder| decode_tagged(decoder, TAG_EXPN_DATA))
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},
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|expn_id| tcx.untracked_resolutions.cstore.decode_expn_data(tcx.sess, expn_id),
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)
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let krate = decoder.cnum_map[&hash.stable_crate_id()];
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let expn_id = if krate == LOCAL_CRATE {
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// We look up the position of the associated `ExpnData` and decode it.
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let pos = decoder
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.expn_data
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.get(&hash)
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.unwrap_or_else(|| panic!("Bad hash {:?} (map {:?})", hash, decoder.expn_data));
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let data: ExpnData = decoder
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.with_position(pos.to_usize(), |decoder| decode_tagged(decoder, TAG_EXPN_DATA))?;
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rustc_span::hygiene::register_local_expn_id(data, hash)
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} else {
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let index_guess = decoder.foreign_expn_data[&hash];
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decoder.tcx.untracked_resolutions.cstore.expn_hash_to_expn_id(krate, index_guess, hash)
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};
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#[cfg(debug_assertions)]
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{
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use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
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let mut hcx = decoder.tcx.create_stable_hashing_context();
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let mut hasher = StableHasher::new();
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expn_id.expn_data().hash_stable(&mut hcx, &mut hasher);
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let local_hash: u64 = hasher.finish();
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debug_assert_eq!(hash.local_hash(), local_hash);
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}
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Ok(expn_id)
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}
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}
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@ -990,8 +1016,7 @@ where
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{
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fn encode(&self, s: &mut CacheEncoder<'a, 'tcx, E>) -> Result<(), E::Error> {
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s.hygiene_context.schedule_expn_data_for_encoding(*self);
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self.krate.encode(s)?;
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self.local_id.as_u32().encode(s)
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self.expn_hash().encode(s)
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}
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}
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@ -136,7 +136,7 @@ impl Borrow<Fingerprint> for DefPathHash {
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/// further trouble.
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#[derive(Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord, Debug)]
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#[derive(HashStable_Generic, Encodable, Decodable)]
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pub struct StableCrateId(u64);
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pub struct StableCrateId(pub(crate) u64);
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impl StableCrateId {
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pub fn to_u64(self) -> u64 {
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@ -29,7 +29,7 @@ use crate::symbol::{kw, sym, Symbol};
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use crate::with_session_globals;
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use crate::{HashStableContext, Span, DUMMY_SP};
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use crate::def_id::{CrateNum, DefId, CRATE_DEF_ID, LOCAL_CRATE};
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use crate::def_id::{CrateNum, DefId, StableCrateId, CRATE_DEF_ID, LOCAL_CRATE};
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use rustc_data_structures::fingerprint::Fingerprint;
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use rustc_data_structures::fx::{FxHashMap, FxHashSet};
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use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
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@ -92,6 +92,34 @@ rustc_index::newtype_index! {
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#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Encodable, Decodable, HashStable_Generic)]
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pub struct ExpnHash(Fingerprint);
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impl ExpnHash {
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/// Returns the [StableCrateId] identifying the crate this [ExpnHash]
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/// originates from.
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#[inline]
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pub fn stable_crate_id(self) -> StableCrateId {
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StableCrateId(self.0.as_value().0)
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}
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/// Returns the crate-local part of the [ExpnHash].
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///
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/// Used for tests.
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#[inline]
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pub fn local_hash(self) -> u64 {
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self.0.as_value().1
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}
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#[inline]
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pub fn is_root(self) -> bool {
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self.0 == Fingerprint::ZERO
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}
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/// Builds a new [ExpnHash] with the given [StableCrateId] and
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/// `local_hash`, where `local_hash` must be unique within its crate.
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fn new(stable_crate_id: StableCrateId, local_hash: u64) -> ExpnHash {
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ExpnHash(Fingerprint::new(stable_crate_id.0, local_hash))
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}
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}
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/// A property of a macro expansion that determines how identifiers
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/// produced by that expansion are resolved.
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#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Hash, Debug, Encodable, Decodable)]
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@ -268,12 +296,12 @@ pub struct HygieneData {
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expn_hash_to_expn_id: UnhashMap<ExpnHash, ExpnId>,
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syntax_context_data: Vec<SyntaxContextData>,
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syntax_context_map: FxHashMap<(SyntaxContext, ExpnId, Transparency), SyntaxContext>,
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/// Maps the `Fingerprint` of an `ExpnData` to the next disambiguator value.
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/// Maps the `local_hash` of an `ExpnData` to the next disambiguator value.
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/// This is used by `update_disambiguator` to keep track of which `ExpnData`s
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/// would have collisions without a disambiguator.
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/// The keys of this map are always computed with `ExpnData.disambiguator`
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/// set to 0.
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expn_data_disambiguators: FxHashMap<Fingerprint, u32>,
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expn_data_disambiguators: FxHashMap<u64, u32>,
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}
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impl HygieneData {
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@ -981,7 +1009,7 @@ impl ExpnData {
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}
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#[inline]
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fn hash_expn(&self, ctx: &mut impl HashStableContext) -> Fingerprint {
|
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fn hash_expn(&self, ctx: &mut impl HashStableContext) -> u64 {
|
||||
let mut hasher = StableHasher::new();
|
||||
self.hash_stable(ctx, &mut hasher);
|
||||
hasher.finish()
|
||||
@ -1191,75 +1219,46 @@ pub struct HygieneDecodeContext {
|
||||
// so that multiple occurrences of the same serialized id are decoded to the same
|
||||
// `SyntaxContext`
|
||||
remapped_ctxts: Lock<Vec<Option<SyntaxContext>>>,
|
||||
// The same as `remapepd_ctxts`, but for `ExpnId`s
|
||||
remapped_expns: Lock<Vec<Option<LocalExpnId>>>,
|
||||
}
|
||||
|
||||
pub fn decode_expn_id_incrcomp<E>(
|
||||
krate: CrateNum,
|
||||
index: u32,
|
||||
context: &HygieneDecodeContext,
|
||||
decode_data: impl FnOnce(u32) -> Result<(ExpnData, ExpnHash), E>,
|
||||
decode_foreign: impl FnOnce(ExpnId) -> (ExpnData, ExpnHash),
|
||||
) -> Result<ExpnId, E> {
|
||||
// Do this after decoding, so that we decode a `CrateNum`
|
||||
// if necessary
|
||||
if index == 0 {
|
||||
debug!("decode_expn_id: deserialized root");
|
||||
return Ok(ExpnId::root());
|
||||
}
|
||||
|
||||
if krate != LOCAL_CRATE {
|
||||
let expn_id = decode_expn_id(krate, index, decode_foreign);
|
||||
return Ok(expn_id);
|
||||
}
|
||||
|
||||
let outer_expns = &context.remapped_expns;
|
||||
|
||||
// Ensure that the lock() temporary is dropped early
|
||||
{
|
||||
if let Some(expn_id) = outer_expns.lock().get(index as usize).copied().flatten() {
|
||||
return Ok(expn_id.to_expn_id());
|
||||
}
|
||||
}
|
||||
|
||||
// Don't decode the data inside `HygieneData::with`, since we need to recursively decode
|
||||
// other ExpnIds
|
||||
let (mut expn_data, hash) = decode_data(index)?;
|
||||
debug_assert_eq!(krate, expn_data.krate);
|
||||
|
||||
let expn_id = HygieneData::with(|hygiene_data| {
|
||||
if let Some(expn_id) = hygiene_data.expn_hash_to_expn_id.get(&hash) {
|
||||
return *expn_id;
|
||||
}
|
||||
|
||||
/// Register an expansion which has been decoded from the on-disk-cache for the local crate.
|
||||
pub fn register_local_expn_id(mut data: ExpnData, hash: ExpnHash) -> ExpnId {
|
||||
HygieneData::with(|hygiene_data| {
|
||||
// If we just deserialized an `ExpnData` owned by
|
||||
// the local crate, its `orig_id` will be stale,
|
||||
// so we need to update it to its own value.
|
||||
// This only happens when we deserialize the incremental cache,
|
||||
// since a crate will never decode its own metadata.
|
||||
let expn_id = hygiene_data.local_expn_data.next_index();
|
||||
expn_data.orig_id = Some(expn_id.as_u32());
|
||||
hygiene_data.local_expn_data.push(Some(expn_data));
|
||||
data.orig_id = Some(expn_id.as_u32());
|
||||
hygiene_data.local_expn_data.push(Some(data));
|
||||
let _eid = hygiene_data.local_expn_hashes.push(hash);
|
||||
debug_assert_eq!(expn_id, _eid);
|
||||
|
||||
let mut expns = outer_expns.lock();
|
||||
let new_len = index as usize + 1;
|
||||
if expns.len() < new_len {
|
||||
expns.resize(new_len, None);
|
||||
}
|
||||
expns[index as usize] = Some(expn_id);
|
||||
drop(expns);
|
||||
let expn_id = expn_id.to_expn_id();
|
||||
|
||||
let _old_id = hygiene_data.expn_hash_to_expn_id.insert(hash, expn_id);
|
||||
debug_assert!(_old_id.is_none());
|
||||
expn_id
|
||||
});
|
||||
Ok(expn_id)
|
||||
})
|
||||
}
|
||||
|
||||
/// Register an expansion which has been decoded from the metadata of a foreign crate.
|
||||
pub fn register_expn_id(data: ExpnData, hash: ExpnHash) -> ExpnId {
|
||||
let expn_id =
|
||||
ExpnId { krate: data.krate, local_id: ExpnIndex::from_u32(data.orig_id.unwrap()) };
|
||||
HygieneData::with(|hygiene_data| {
|
||||
let _old_data = hygiene_data.foreign_expn_data.insert(expn_id, data);
|
||||
debug_assert!(_old_data.is_none());
|
||||
let _old_hash = hygiene_data.foreign_expn_hashes.insert(expn_id, hash);
|
||||
debug_assert!(_old_hash.is_none());
|
||||
let _old_id = hygiene_data.expn_hash_to_expn_id.insert(hash, expn_id);
|
||||
debug_assert!(_old_id.is_none());
|
||||
});
|
||||
expn_id
|
||||
}
|
||||
|
||||
/// Decode an expansion from the metadata of a foreign crate.
|
||||
pub fn decode_expn_id(
|
||||
krate: CrateNum,
|
||||
index: u32,
|
||||
@ -1287,16 +1286,7 @@ pub fn decode_expn_id(
|
||||
debug_assert_eq!(krate, expn_data.krate);
|
||||
debug_assert_eq!(Some(index.as_u32()), expn_data.orig_id);
|
||||
|
||||
HygieneData::with(|hygiene_data| {
|
||||
let _old_data = hygiene_data.foreign_expn_data.insert(expn_id, expn_data);
|
||||
debug_assert!(_old_data.is_none());
|
||||
let _old_hash = hygiene_data.foreign_expn_hashes.insert(expn_id, hash);
|
||||
debug_assert!(_old_hash.is_none());
|
||||
let _old_id = hygiene_data.expn_hash_to_expn_id.insert(hash, expn_id);
|
||||
debug_assert!(_old_id.is_none());
|
||||
});
|
||||
|
||||
expn_id
|
||||
register_expn_id(expn_data, hash)
|
||||
}
|
||||
|
||||
// Decodes `SyntaxContext`, using the provided `HygieneDecodeContext`
|
||||
@ -1493,7 +1483,8 @@ fn update_disambiguator(expn_id: LocalExpnId, mut ctx: impl HashStableContext) {
|
||||
});
|
||||
}
|
||||
|
||||
let expn_hash = ExpnHash(expn_hash);
|
||||
let expn_hash =
|
||||
ExpnHash::new(ctx.def_path_hash(LOCAL_CRATE.as_def_id()).stable_crate_id(), expn_hash);
|
||||
HygieneData::with(|data| {
|
||||
data.local_expn_data[expn_id].as_mut().unwrap().disambiguator = disambiguator;
|
||||
debug_assert_eq!(data.local_expn_hashes[expn_id].0, Fingerprint::ZERO);
|
||||
|
Loading…
Reference in New Issue
Block a user