make output_filenames a real query

compiler/rustc_ast_lowering/src/lib.rs

@@ -416,6 +416,7 @@ fn compute_hir_hash(
 
 pub fn lower_to_hir(tcx: TyCtxt<'_>, (): ()) -> hir::Crate<'_> {
     let sess = tcx.sess;
+    tcx.ensure().output_filenames(());
     let (mut resolver, krate) = tcx.resolver_for_lowering(()).steal();
 
     let ast_index = index_crate(&resolver.node_id_to_def_id, &krate);

compiler/rustc_driver/src/lib.rs

@@ -296,9 +296,8 @@ fn run_compiler(
 
             if let Some(ppm) = &sess.opts.pretty {
                 if ppm.needs_ast_map() {
-                    let expanded_crate = queries.expansion()?.borrow().0.clone();
                     queries.global_ctxt()?.enter(|tcx| {
-                        pretty::print_after_hir_lowering(tcx, &*expanded_crate, *ppm);
+                        pretty::print_after_hir_lowering(tcx, *ppm);
                         Ok(())
                     })?;
                 } else {
@@ -328,11 +327,15 @@ fn run_compiler(
                 }
             }
 
-            queries.global_ctxt()?;
+            let mut gctxt = queries.global_ctxt()?;
             if callbacks.after_expansion(compiler, queries) == Compilation::Stop {
                 return early_exit();
             }
 
+            // Make sure the `output_filenames` query is run for its side
+            // effects of writing the dep-info and reporting errors.
+            gctxt.enter(|tcx| tcx.output_filenames(()));
+
             if sess.opts.output_types.contains_key(&OutputType::DepInfo)
                 && sess.opts.output_types.len() == 1
             {
@@ -343,7 +346,7 @@ fn run_compiler(
                 return early_exit();
             }
 
-            queries.global_ctxt()?.enter(|tcx| {
+            gctxt.enter(|tcx| {
                 let result = tcx.analysis(());
                 if sess.opts.unstable_opts.save_analysis {
                     let crate_name = tcx.crate_name(LOCAL_CRATE);
@@ -360,6 +363,8 @@ fn run_compiler(
                 result
             })?;
 
+            drop(gctxt);
+
             if callbacks.after_analysis(compiler, queries) == Compilation::Stop {
                 return early_exit();
             }

compiler/rustc_driver/src/pretty.rs

@@ -403,7 +403,7 @@ pub fn print_after_parsing(sess: &Session, krate: &ast::Crate, ppm: PpMode) {
     write_or_print(&out, sess);
 }
 
-pub fn print_after_hir_lowering<'tcx>(tcx: TyCtxt<'tcx>, krate: &ast::Crate, ppm: PpMode) {
+pub fn print_after_hir_lowering<'tcx>(tcx: TyCtxt<'tcx>, ppm: PpMode) {
     if ppm.needs_analysis() {
         abort_on_err(print_with_analysis(tcx, ppm), tcx.sess);
         return;
@@ -420,7 +420,7 @@ pub fn print_after_hir_lowering<'tcx>(tcx: TyCtxt<'tcx>, krate: &ast::Crate, ppm
                 let parse = &sess.parse_sess;
                 pprust::print_crate(
                     sess.source_map(),
-                    krate,
+                    &tcx.resolver_for_lowering(()).borrow().1,
                     src_name,
                     src,
                     annotation.pp_ann(),
@@ -433,7 +433,7 @@ pub fn print_after_hir_lowering<'tcx>(tcx: TyCtxt<'tcx>, krate: &ast::Crate, ppm
 
         AstTree(PpAstTreeMode::Expanded) => {
             debug!("pretty-printing expanded AST");
-            format!("{krate:#?}")
+            format!("{:#?}", tcx.resolver_for_lowering(()).borrow().1)
         }
 
         Hir(s) => call_with_pp_support_hir(&s, tcx, move |annotation, hir_map| {

compiler/rustc_interface/src/passes.rs

@@ -16,7 +16,7 @@ use rustc_data_structures::parallel;
 use rustc_data_structures::sync::{Lrc, OnceCell, WorkerLocal};
 use rustc_errors::{ErrorGuaranteed, PResult};
 use rustc_expand::base::{ExtCtxt, LintStoreExpand, ResolverExpand};
-use rustc_hir::def_id::StableCrateId;
+use rustc_hir::def_id::{StableCrateId, LOCAL_CRATE};
 use rustc_lint::{BufferedEarlyLint, EarlyCheckNode, LintStore};
 use rustc_metadata::creader::CStore;
 use rustc_middle::arena::Arena;
@@ -30,7 +30,7 @@ use rustc_plugin_impl as plugin;
 use rustc_query_impl::{OnDiskCache, Queries as TcxQueries};
 use rustc_resolve::{Resolver, ResolverArenas};
 use rustc_session::config::{CrateType, Input, OutputFilenames, OutputType};
-use rustc_session::cstore::{MetadataLoader, MetadataLoaderDyn, Untracked};
+use rustc_session::cstore::{CrateStoreDyn, MetadataLoader, MetadataLoaderDyn, Untracked};
 use rustc_session::output::filename_for_input;
 use rustc_session::search_paths::PathKind;
 use rustc_session::{Limit, Session};
@@ -47,7 +47,7 @@ use std::marker::PhantomPinned;
 use std::path::{Path, PathBuf};
 use std::pin::Pin;
 use std::rc::Rc;
-use std::sync::LazyLock;
+use std::sync::{Arc, LazyLock};
 use std::{env, fs, iter};
 
 pub fn parse<'a>(sess: &'a Session) -> PResult<'a, ast::Crate> {
@@ -548,7 +548,7 @@ fn escape_dep_env(symbol: Symbol) -> String {
 
 fn write_out_deps(
     sess: &Session,
-    boxed_resolver: &RefCell<BoxedResolver>,
+    cstore: &CrateStoreDyn,
     outputs: &OutputFilenames,
     out_filenames: &[PathBuf],
 ) {
@@ -600,20 +600,19 @@ fn write_out_deps(
                 }
             }
 
-            boxed_resolver.borrow_mut().access(|resolver| {
-                for cnum in resolver.cstore().crates_untracked() {
-                    let source = resolver.cstore().crate_source_untracked(cnum);
-                    if let Some((path, _)) = &source.dylib {
-                        files.push(escape_dep_filename(&path.display().to_string()));
-                    }
-                    if let Some((path, _)) = &source.rlib {
-                        files.push(escape_dep_filename(&path.display().to_string()));
-                    }
-                    if let Some((path, _)) = &source.rmeta {
-                        files.push(escape_dep_filename(&path.display().to_string()));
-                    }
+            let cstore = cstore.as_any().downcast_ref::<CStore>().unwrap();
+            for cnum in cstore.crates_untracked() {
+                let source = cstore.crate_source_untracked(cnum);
+                if let Some((path, _)) = &source.dylib {
+                    files.push(escape_dep_filename(&path.display().to_string()));
                 }
-            });
+                if let Some((path, _)) = &source.rlib {
+                    files.push(escape_dep_filename(&path.display().to_string()));
+                }
+                if let Some((path, _)) = &source.rmeta {
+                    files.push(escape_dep_filename(&path.display().to_string()));
+                }
+            }
         }
 
         let mut file = BufWriter::new(fs::File::create(&deps_filename)?);
@@ -661,13 +660,11 @@ fn write_out_deps(
     }
 }
 
-pub fn prepare_outputs(
-    sess: &Session,
-    krate: &ast::Crate,
-    boxed_resolver: &RefCell<BoxedResolver>,
-    crate_name: Symbol,
-) -> Result<OutputFilenames> {
+fn output_filenames(tcx: TyCtxt<'_>, (): ()) -> Arc<OutputFilenames> {
+    let sess = tcx.sess;
     let _timer = sess.timer("prepare_outputs");
+    let (_, krate) = &*tcx.resolver_for_lowering(()).borrow();
+    let crate_name = tcx.crate_name(LOCAL_CRATE);
 
     // FIXME: rustdoc passes &[] instead of &krate.attrs here
     let outputs = util::build_output_filenames(&krate.attrs, sess);
@@ -679,45 +676,41 @@ pub fn prepare_outputs(
     if let Some(ref input_path) = sess.io.input.opt_path() {
         if sess.opts.will_create_output_file() {
             if output_contains_path(&output_paths, input_path) {
-                let reported = sess.emit_err(InputFileWouldBeOverWritten { path: input_path });
-                return Err(reported);
+                sess.emit_fatal(InputFileWouldBeOverWritten { path: input_path });
             }
             if let Some(ref dir_path) = output_conflicts_with_dir(&output_paths) {
-                let reported =
-                    sess.emit_err(GeneratedFileConflictsWithDirectory { input_path, dir_path });
-                return Err(reported);
+                sess.emit_fatal(GeneratedFileConflictsWithDirectory { input_path, dir_path });
             }
         }
     }
 
     if let Some(ref dir) = sess.io.temps_dir {
         if fs::create_dir_all(dir).is_err() {
-            let reported = sess.emit_err(TempsDirError);
-            return Err(reported);
+            sess.emit_fatal(TempsDirError);
         }
     }
 
-    write_out_deps(sess, boxed_resolver, &outputs, &output_paths);
+    write_out_deps(sess, tcx.cstore_untracked(), &outputs, &output_paths);
 
     let only_dep_info = sess.opts.output_types.contains_key(&OutputType::DepInfo)
         && sess.opts.output_types.len() == 1;
 
     if !only_dep_info {
         if let Some(ref dir) = sess.io.output_dir {
             if fs::create_dir_all(dir).is_err() {
-                let reported = sess.emit_err(OutDirError);
-                return Err(reported);
+                sess.emit_fatal(OutDirError);
             }
         }
     }
 
-    Ok(outputs)
+    outputs.into()
 }
 
 pub static DEFAULT_QUERY_PROVIDERS: LazyLock<Providers> = LazyLock::new(|| {
     let providers = &mut Providers::default();
     providers.analysis = analysis;
     providers.hir_crate = rustc_ast_lowering::lower_to_hir;
+    providers.output_filenames = output_filenames;
     proc_macro_decls::provide(providers);
     rustc_const_eval::provide(providers);
     rustc_middle::hir::provide(providers);

compiler/rustc_interface/src/queries.rs

@@ -65,7 +65,7 @@ impl<'a, T> std::ops::DerefMut for QueryResult<'a, T> {
 }
 
 impl<'a, 'tcx> QueryResult<'a, QueryContext<'tcx>> {
-    pub fn enter<T>(mut self, f: impl FnOnce(TyCtxt<'tcx>) -> T) -> T {
+    pub fn enter<T>(&mut self, f: impl FnOnce(TyCtxt<'tcx>) -> T) -> T {
         (*self.0).get_mut().enter(f)
     }
 }
@@ -212,8 +212,6 @@ impl<'tcx> Queries<'tcx> {
             let crate_name = *self.crate_name()?.borrow();
             let (krate, resolver, lint_store) = self.expansion()?.steal();
 
-            let outputs = passes::prepare_outputs(self.session(), &krate, &resolver, crate_name)?;
-
             let ty::ResolverOutputs {
                 untracked,
                 global_ctxt: untracked_resolutions,
@@ -237,7 +235,6 @@ impl<'tcx> Queries<'tcx> {
                     tcx.arena.alloc(Steal::new((untracked_resolver_for_lowering, krate))),
                 );
                 feed.resolutions(tcx.arena.alloc(untracked_resolutions));
-                feed.output_filenames(tcx.arena.alloc(std::sync::Arc::new(outputs)));
                 feed.features_query(tcx.sess.features_untracked());
                 let feed = tcx.feed_local_crate();
                 feed.crate_name(crate_name);

compiler/rustc_middle/src/query/mod.rs

@@ -1862,9 +1862,10 @@ rustc_queries! {
     ///
     /// This query returns an `&Arc` because codegen backends need the value even after the `TyCtxt`
     /// has been destroyed.
-    query output_filenames(_: ()) -> &'tcx Arc<OutputFilenames> {
+    query output_filenames(_: ()) -> Arc<OutputFilenames> {
         feedable
         desc { "getting output filenames" }
+        arena_cache
     }
 
     /// Do not call this query directly: invoke `normalize` instead.

src/librustdoc/lib.rs

@@ -815,7 +815,7 @@ fn main_args(at_args: &[String]) -> MainResult {
                 sess.fatal("Compilation failed, aborting rustdoc");
             }
 
-            let global_ctxt = abort_on_err(queries.global_ctxt(), sess);
+            let mut global_ctxt = abort_on_err(queries.global_ctxt(), sess);
 
             global_ctxt.enter(|tcx| {
                 let (krate, render_opts, mut cache) = sess.time("run_global_ctxt", || {

tests/run-make/overwrite-input/Makefile

@@ -0,0 +1,13 @@
+include ../../run-make-fulldeps/tools.mk
+
+all:
+	$(RUSTC) main.rs -o main.rs 2> $(TMPDIR)/file.stderr || echo "failed successfully"
+	$(RUSTC) main.rs -o . 2> $(TMPDIR)/folder.stderr || echo "failed successfully"
+
+ifdef RUSTC_BLESS_TEST
+	cp "$(TMPDIR)"/file.stderr file.stderr
+	cp "$(TMPDIR)"/folder.stderr folder.stderr
+else
+	$(DIFF) file.stderr "$(TMPDIR)"/file.stderr
+	$(DIFF) folder.stderr "$(TMPDIR)"/folder.stderr
+endif

tests/run-make/overwrite-input/file.stderr

@@ -0,0 +1,6 @@
+warning: ignoring --out-dir flag due to -o flag
+
+error: the input file "main.rs" would be overwritten by the generated executable
+
+error: aborting due to previous error; 1 warning emitted
+

tests/run-make/overwrite-input/folder.stderr

@@ -0,0 +1,6 @@
+warning: ignoring --out-dir flag due to -o flag
+
+error: the generated executable for the input file "main.rs" conflicts with the existing directory "."
+
+error: aborting due to previous error; 1 warning emitted
+

tests/run-make/overwrite-input/main.rs

@@ -0,0 +1 @@
+fn main() {}

tests/run-make/overwrite-input/main.stderr

@@ -0,0 +1,6 @@
+warning: ignoring --out-dir flag due to -o flag
+
+error: the input file "main.rs" would be overwritten by the generated executable
+
+error: aborting due to previous error; 1 warning emitted
+

tests/ui/io-checks/inaccessbile-temp-dir.rs

@@ -0,0 +1,39 @@
+// Issue #66530: We would ICE if someone compiled with `-o /dev/null`,
+// because we would try to generate auxiliary files in `/dev/` (which
+// at least the OS X file system rejects).
+//
+// An attempt to `-o` into a directory we cannot write into should indeed
+// be an error; but not an ICE.
+//
+// However, some folks run tests as root, which can write `/dev/` and end
+// up clobbering `/dev/null`. Instead we'll use a non-existent path, which
+// also used to ICE, but even root can't magically write there.
+
+// compile-flags: -Z temps-dir=/does-not-exist/output
+
+// The error-pattern check occurs *before* normalization, and the error patterns
+// are wildly different between build environments. So this is a cop-out (and we
+// rely on the checking of the normalized stderr output as our actual
+// "verification" of the diagnostic).
+
+// error-pattern: error
+
+// On Mac OS X, we get an error like the below
+// normalize-stderr-test "failed to write bytecode to /does-not-exist/output.non_ice_error_on_worker_io_fail.*" -> "io error modifying /does-not-exist/"
+
+// On Linux, we get an error like the below
+// normalize-stderr-test "couldn't create a temp dir.*" -> "io error modifying /does-not-exist/"
+
+// ignore-windows - this is a unix-specific test
+// ignore-emscripten - the file-system issues do not replicate here
+// ignore-wasm - the file-system issues do not replicate here
+// ignore-arm - the file-system issues do not replicate here, at least on armhf-gnu
+
+#![crate_type = "lib"]
+#![cfg_attr(not(feature = "std"), no_std)]
+pub mod task {
+    pub mod __internal {
+        use crate::task::Waker;
+    }
+    pub use core::task::Waker;
+}

tests/ui/io-checks/inaccessbile-temp-dir.stderr

@@ -0,0 +1,4 @@
+error: failed to find or create the directory specified by `--temps-dir`
+
+error: aborting due to previous error
+