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Comment drop_serialized_data.

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This commit is contained in:
Camille GILLOT 2021-08-28 21:49:51 +02:00
parent 98007e2ce6
commit bcefd487c3
1 changed files with 5 additions and 0 deletions
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5
compiler/rustc_query_impl/src/on_disk_cache.rs
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@ -246,6 +246,11 @@ impl<'sess> rustc_middle::ty::OnDiskCache<'sess> for OnDiskCache<'sess> {
}
}
/// Execute all cache promotions and release the serialized backing Mmap.
///
/// Cache promotions require invoking queries, which needs to read the serialized data.
/// In order to serialize the new on-disk cache, the former on-disk cache file needs to be
/// deleted, hence we won't be able to refer to its memmapped data.
fn drop_serialized_data(&self, tcx: TyCtxt<'tcx>) {
// Register any dep nodes that we reused from the previous session,
// but didn't `DepNode::construct` in this session. This ensures