analysis_stats: Record lang item queries, disable async drop in stats

.github/workflows/ci.yaml

@@ -16,6 +16,7 @@ env:
   CI: 1
   RUST_BACKTRACE: short
   RUSTUP_MAX_RETRIES: 10
+  RUSTFLAGS: "-D warnings -W unreachable-pub --cfg no_salsa_async_drops"
 
 defaults:
   run:
@@ -41,8 +42,6 @@ jobs:
     if: github.repository == 'rust-lang/rust-analyzer'
     name: proc-macro-srv
     runs-on: ubuntu-latest
-    env:
-      RUSTFLAGS: "-D warnings"
 
     steps:
       - name: Checkout repository
@@ -80,7 +79,6 @@ jobs:
     name: Rust
     runs-on: ${{ matrix.os }}
     env:
-      RUSTFLAGS: "-Dwarnings"
       CC: deny_c
 
     strategy:
@@ -207,8 +205,6 @@ jobs:
           # crate should
           - target: wasm32-unknown-unknown
             ide-only: true
-    env:
-      RUSTFLAGS: "-Dwarnings"
 
     steps:
       - name: Checkout repository

.github/workflows/metrics.yaml

@@ -7,7 +7,7 @@ on:
 env:
   CARGO_INCREMENTAL: 0
   CARGO_NET_RETRY: 10
-  RUSTFLAGS: "-D warnings -W unreachable-pub"
+  RUSTFLAGS: "-D warnings -W unreachable-pub -cfg no_salsa_async_drops"
   RUSTUP_MAX_RETRIES: 10
 
 jobs:

Cargo.toml

@@ -184,7 +184,7 @@ hashbrown = { version = "0.14.*", features = [
 elided_lifetimes_in_paths = "warn"
 explicit_outlives_requirements = "warn"
 unsafe_op_in_unsafe_fn = "warn"
-unexpected_cfgs = { level = "warn", check-cfg = ['cfg(bootstrap)'] }
+unexpected_cfgs = { level = "warn", check-cfg = ['cfg(bootstrap)', "cfg(no_salsa_async_drops)"] }
 unused_extern_crates = "warn"
 unused_lifetimes = "warn"
 unreachable_pub = "warn"

crates/rust-analyzer/src/cli/analysis_stats.rs

@@ -11,7 +11,7 @@ use std::{
 use cfg::{CfgAtom, CfgDiff};
 use hir::{
     Adt, AssocItem, Crate, DefWithBody, FindPathConfig, HasCrate, HasSource, HirDisplay, ModuleDef,
-    Name,
+    Name, crate_lang_items,
     db::{DefDatabase, ExpandDatabase, HirDatabase},
     next_solver::{DbInterner, GenericArgs},
 };
@@ -200,7 +200,7 @@ impl flags::AnalysisStats {
         let mut num_crates = 0;
         let mut visited_modules = FxHashSet::default();
         let mut visit_queue = Vec::new();
-        for krate in krates {
+        for &krate in &krates {
             let module = krate.root_module();
             let file_id = module.definition_source_file_id(db);
             let file_id = file_id.original_file(db);
@@ -313,6 +313,10 @@ impl flags::AnalysisStats {
         }
 
         hir::attach_db(db, || {
+            if !self.skip_lang_items {
+                self.run_lang_items(db, &krates, verbosity);
+            }
+
             if !self.skip_lowering {
                 self.run_body_lowering(db, &vfs, &bodies, verbosity);
             }
@@ -1109,6 +1113,26 @@ impl flags::AnalysisStats {
         report_metric("body lowering time", body_lowering_time.time.as_millis() as u64, "ms");
     }
 
+    fn run_lang_items(&self, db: &RootDatabase, crates: &[Crate], verbosity: Verbosity) {
+        let mut bar = match verbosity {
+            Verbosity::Quiet | Verbosity::Spammy => ProgressReport::hidden(),
+            _ if self.output.is_some() => ProgressReport::hidden(),
+            _ => ProgressReport::new(crates.len()),
+        };
+
+        let mut sw = self.stop_watch();
+        bar.tick();
+        for &krate in crates {
+            crate_lang_items(db, krate.into());
+            bar.inc(1);
+        }
+
+        bar.finish_and_clear();
+        let time = sw.elapsed();
+        eprintln!("{:<20} {}", "Crate lang items:", time);
+        report_metric("crate lang items time", time.time.as_millis() as u64, "ms");
+    }
+
     /// Invariant: `file_ids` must be sorted and deduped before passing into here
     fn run_ide_things(
         &self,

crates/rust-analyzer/src/cli/flags.rs

@@ -78,6 +78,8 @@ xflags::xflags! {
             optional --disable-proc-macros
             /// Run the proc-macro-srv binary at the specified path.
             optional --proc-macro-srv path: PathBuf
+            /// Skip lang items fetching.
+            optional --skip-lang-items
             /// Skip body lowering.
             optional --skip-lowering
             /// Skip type inference.
@@ -256,6 +258,7 @@ pub struct AnalysisStats {
     pub disable_proc_macros: bool,
     pub proc_macro_srv: Option<PathBuf>,
     pub skip_lowering: bool,
+    pub skip_lang_items: bool,
     pub skip_inference: bool,
     pub skip_mir_stats: bool,
     pub skip_data_layout: bool,

crates/span/src/map.rs

@@ -156,6 +156,7 @@ where
     }
 }
 
+#[cfg(not(no_salsa_async_drops))]
 impl<S> Drop for SpanMap<S> {
     fn drop(&mut self) {
         struct SendPtr(*mut [()]);

crates/syntax/src/lib.rs

@@ -200,6 +200,7 @@ impl ast::Expr {
     }
 }
 
+#[cfg(not(no_salsa_async_drops))]
 impl<T> Drop for Parse<T> {
     fn drop(&mut self) {
         let Some(green) = self.green.take() else {