Make output_filenames a real query

compiler/rustc_driver/src/lib.rs

@@ -333,6 +333,8 @@ fn run_compiler(
                 return early_exit();
             }
 
+            queries.global_ctxt()?.enter(|tcx| tcx.output_filenames(()));
+
             if sess.opts.output_types.contains_key(&OutputType::DepInfo)
                 && sess.opts.output_types.len() == 1
             {

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;
@@ -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> {
@@ -660,13 +660,11 @@ fn write_out_deps(
     }
 }
 
-pub fn prepare_outputs(
-    sess: &Session,
-    krate: &ast::Crate,
-    cstore: &CrateStoreDyn,
-    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);
@@ -678,25 +676,21 @@ 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, cstore, &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;
@@ -704,19 +698,19 @@ pub fn prepare_outputs(
     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

@@ -235,14 +235,6 @@ impl<'tcx> Queries<'tcx> {
                     tcx.arena.alloc(Steal::new((untracked_resolver_for_lowering, krate))),
                 );
                 feed.resolutions(tcx.arena.alloc(untracked_resolutions));
-
-                let outputs = passes::prepare_outputs(
-                    self.session(),
-                    &krate,
-                    &*untracked.cstore,
-                    crate_name,
-                )?;
-                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.

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
+