diff options
Diffstat (limited to 'compiler/rustc_query_impl/src/on_disk_cache.rs')
| -rw-r--r-- | compiler/rustc_query_impl/src/on_disk_cache.rs | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/compiler/rustc_query_impl/src/on_disk_cache.rs b/compiler/rustc_query_impl/src/on_disk_cache.rs index ee64f22618e..e696df85b88 100644 --- a/compiler/rustc_query_impl/src/on_disk_cache.rs +++ b/compiler/rustc_query_impl/src/on_disk_cache.rs @@ -1,5 +1,6 @@ use crate::QueryCtxt; use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexSet}; +use rustc_data_structures::memmap::Mmap; use rustc_data_structures::sync::{HashMapExt, Lock, Lrc, OnceCell}; use rustc_data_structures::unhash::UnhashMap; use rustc_hir::def_id::{CrateNum, DefId, DefIndex, LocalDefId, StableCrateId, LOCAL_CRATE}; @@ -42,7 +43,7 @@ const TAG_EXPN_DATA: u8 = 1; /// any side effects that have been emitted during a query. pub struct OnDiskCache<'sess> { // The complete cache data in serialized form. - serialized_data: Vec<u8>, + serialized_data: Option<Mmap>, // Collects all `QuerySideEffects` created during the current compilation // session. @@ -182,7 +183,8 @@ impl EncodedSourceFileId { } impl<'sess> rustc_middle::ty::OnDiskCache<'sess> for OnDiskCache<'sess> { - fn new(sess: &'sess Session, data: Vec<u8>, start_pos: usize) -> Self { + /// Creates a new `OnDiskCache` instance from the serialized data in `data`. + fn new(sess: &'sess Session, data: Mmap, start_pos: usize) -> Self { debug_assert!(sess.opts.incremental.is_some()); // Wrap in a scope so we can borrow `data`. @@ -204,7 +206,7 @@ impl<'sess> rustc_middle::ty::OnDiskCache<'sess> for OnDiskCache<'sess> { }; Self { - serialized_data: data, + serialized_data: Some(data), file_index_to_stable_id: footer.file_index_to_stable_id, file_index_to_file: Default::default(), cnum_map: OnceCell::new(), @@ -225,7 +227,7 @@ impl<'sess> rustc_middle::ty::OnDiskCache<'sess> for OnDiskCache<'sess> { fn new_empty(source_map: &'sess SourceMap) -> Self { Self { - serialized_data: Vec::new(), + serialized_data: None, file_index_to_stable_id: Default::default(), file_index_to_file: Default::default(), cnum_map: OnceCell::new(), @@ -577,7 +579,10 @@ impl<'sess> OnDiskCache<'sess> { let mut decoder = CacheDecoder { tcx, - opaque: opaque::Decoder::new(&self.serialized_data[..], pos.to_usize()), + opaque: opaque::Decoder::new( + self.serialized_data.as_deref().unwrap_or(&[]), + pos.to_usize(), + ), source_map: self.source_map, cnum_map, file_index_to_file: &self.file_index_to_file, |