Split span_to_string into span_to_diagnostic/embeddable_string

compiler/rustc_middle/src/hir/map/collector.rs

@@ -262,7 +262,7 @@ impl<'a, 'hir> NodeCollector<'a, 'hir> {
                     span,
                     "inconsistent DepNode at `{:?}` for `{}`: \
                      current_dep_node_owner={} ({:?}), hir_id.owner={} ({:?})",
-                    self.source_map.span_to_string(span),
+                    self.source_map.span_to_diagnostic_string(span),
                     node_str,
                     self.definitions
                         .def_path(self.current_dep_node_owner)

compiler/rustc_middle/src/mir/mod.rs

@@ -2365,7 +2365,10 @@ impl<'tcx> Debug for Rvalue<'tcx> {
                                 )
                             } else {
                                 let span = tcx.hir().span(hir_id);
-                                format!("[closure@{}]", tcx.sess.source_map().span_to_string(span))
+                                format!(
+                                    "[closure@{}]",
+                                    tcx.sess.source_map().span_to_diagnostic_string(span)
+                                )
                             };
                             let mut struct_fmt = fmt.debug_struct(&name);
 

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -667,7 +667,12 @@ pub trait PrettyPrinter<'tcx>:
                     if let Some(did) = did.as_local() {
                         let hir_id = self.tcx().hir().local_def_id_to_hir_id(did);
                         let span = self.tcx().hir().span(hir_id);
-                        p!(write("@{}", self.tcx().sess.source_map().span_to_string(span)));
+                        p!(write(
+                            "@{}",
+                            // This may end up in stderr diagnostics but it may also be emitted
+                            // into MIR. Hence we use the remapped path if available
+                            self.tcx().sess.source_map().span_to_embeddable_string(span)
+                        ));
                     } else {
                         p!(write("@"), print_def_path(did, substs));
                     }
@@ -702,7 +707,12 @@ pub trait PrettyPrinter<'tcx>:
                             p!("@", print_def_path(did.to_def_id(), substs));
                         } else {
                             let span = self.tcx().hir().span(hir_id);
-                            p!(write("@{}", self.tcx().sess.source_map().span_to_string(span)));
+                            p!(write(
+                                "@{}",
+                                // This may end up in stderr diagnostics but it may also be emitted
+                                // into MIR. Hence we use the remapped path if available
+                                self.tcx().sess.source_map().span_to_embeddable_string(span)
+                            ));
                         }
                     } else {
                         p!(write("@"), print_def_path(did, substs));
@@ -1407,7 +1417,13 @@ impl<F: fmt::Write> Printer<'tcx> for FmtPrinter<'_, 'tcx, F> {
                 if !self.empty_path {
                     write!(self, "::")?;
                 }
-                write!(self, "<impl at {}>", self.tcx.sess.source_map().span_to_string(span))?;
+                write!(
+                    self,
+                    "<impl at {}>",
+                    // This may end up in stderr diagnostics but it may also be emitted
+                    // into MIR. Hence we use the remapped path if available
+                    self.tcx.sess.source_map().span_to_embeddable_string(span)
+                )?;
                 self.empty_path = false;
 
                 return Ok(self);

compiler/rustc_mir/src/borrow_check/region_infer/dump_mir.rs

@@ -76,7 +76,9 @@ impl<'tcx> RegionInferenceContext<'tcx> {
         for constraint in &constraints {
             let OutlivesConstraint { sup, sub, locations, category } = constraint;
             let (name, arg) = match locations {
-                Locations::All(span) => ("All", tcx.sess.source_map().span_to_string(*span)),
+                Locations::All(span) => {
+                    ("All", tcx.sess.source_map().span_to_embeddable_string(*span))
+                }
                 Locations::Single(loc) => ("Single", format!("{:?}", loc)),
             };
             with_msg(&format!("{:?}: {:?} due to {:?} at {}({})", sup, sub, category, name, arg))?;

compiler/rustc_mir/src/transform/coverage/mod.rs

@@ -148,8 +148,8 @@ impl<'a, 'tcx> Instrumentor<'a, 'tcx> {
         debug!(
             "instrumenting {:?}, fn sig span: {}, body span: {}",
             def_id,
-            source_map.span_to_string(fn_sig_span),
-            source_map.span_to_string(body_span)
+            source_map.span_to_diagnostic_string(fn_sig_span),
+            source_map.span_to_diagnostic_string(body_span)
         );
 
         let mut graphviz_data = debug::GraphvizData::new();
@@ -311,8 +311,8 @@ impl<'a, 'tcx> Instrumentor<'a, 'tcx> {
                 "Calling make_code_region(file_name={}, source_file={:?}, span={}, body_span={})",
                 file_name,
                 self.source_file,
-                source_map.span_to_string(span),
-                source_map.span_to_string(body_span)
+                source_map.span_to_diagnostic_string(span),
+                source_map.span_to_diagnostic_string(body_span)
             );
 
             inject_statement(

compiler/rustc_mir/src/util/pretty.rs

@@ -445,7 +445,10 @@ impl Visitor<'tcx> for ExtraComments<'tcx> {
             ty::Tuple(tys) if tys.is_empty() => {}
             _ => {
                 self.push("mir::Constant");
-                self.push(&format!("+ span: {}", self.tcx.sess.source_map().span_to_string(*span)));
+                self.push(&format!(
+                    "+ span: {}",
+                    self.tcx.sess.source_map().span_to_embeddable_string(*span)
+                ));
                 if let Some(user_ty) = user_ty {
                     self.push(&format!("+ user_ty: {:?}", user_ty));
                 }
@@ -516,7 +519,7 @@ impl Visitor<'tcx> for ExtraComments<'tcx> {
 }
 
 fn comment(tcx: TyCtxt<'_>, SourceInfo { span, scope }: SourceInfo) -> String {
-    format!("scope {} at {}", scope.index(), tcx.sess.source_map().span_to_string(span))
+    format!("scope {} at {}", scope.index(), tcx.sess.source_map().span_to_embeddable_string(span))
 }
 
 /// Prints local variables in a scope tree.
@@ -617,7 +620,7 @@ fn write_scope_tree(
                 "{0:1$} // at {2}",
                 indented_header,
                 ALIGN,
-                tcx.sess.source_map().span_to_string(span),
+                tcx.sess.source_map().span_to_embeddable_string(span),
             )?;
         } else {
             writeln!(w, "{}", indented_header)?;
@@ -1004,7 +1007,7 @@ fn write_user_type_annotations(
             "| {:?}: {:?} at {}",
             index.index(),
             annotation.user_ty,
-            tcx.sess.source_map().span_to_string(annotation.span)
+            tcx.sess.source_map().span_to_embeddable_string(annotation.span)
         )?;
     }
     if !body.user_type_annotations.is_empty() {

compiler/rustc_mir/src/util/spanview.rs

@@ -628,7 +628,7 @@ fn tooltip<'tcx>(
 ) -> String {
     let source_map = tcx.sess.source_map();
     let mut text = Vec::new();
-    text.push(format!("{}: {}:", spanview_id, &source_map.span_to_string(span)));
+    text.push(format!("{}: {}:", spanview_id, &source_map.span_to_embeddable_string(span)));
     for statement in statements {
         let source_range = source_range_no_file(tcx, &statement.source_info.span);
         text.push(format!(

compiler/rustc_passes/src/liveness.rs

@@ -132,9 +132,9 @@ enum LiveNodeKind {
 fn live_node_kind_to_string(lnk: LiveNodeKind, tcx: TyCtxt<'_>) -> String {
     let sm = tcx.sess.source_map();
     match lnk {
-        UpvarNode(s) => format!("Upvar node [{}]", sm.span_to_string(s)),
-        ExprNode(s) => format!("Expr node [{}]", sm.span_to_string(s)),
-        VarDefNode(s) => format!("Var def node [{}]", sm.span_to_string(s)),
+        UpvarNode(s) => format!("Upvar node [{}]", sm.span_to_diagnostic_string(s)),
+        ExprNode(s) => format!("Expr node [{}]", sm.span_to_diagnostic_string(s)),
+        VarDefNode(s) => format!("Var def node [{}]", sm.span_to_diagnostic_string(s)),
         ClosureNode => "Closure node".to_owned(),
         ExitNode => "Exit node".to_owned(),
     }

compiler/rustc_passes/src/region.rs

@@ -717,7 +717,7 @@ impl<'tcx> Visitor<'tcx> for RegionResolutionVisitor<'tcx> {
         debug!(
             "visit_body(id={:?}, span={:?}, body.id={:?}, cx.parent={:?})",
             owner_id,
-            self.tcx.sess.source_map().span_to_string(body.value.span),
+            self.tcx.sess.source_map().span_to_diagnostic_string(body.value.span),
             body_id,
             self.cx.parent
         );

compiler/rustc_resolve/src/late/lifetimes.rs

@@ -3347,7 +3347,7 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> {
     fn insert_lifetime(&mut self, lifetime_ref: &'tcx hir::Lifetime, def: Region) {
         debug!(
             node = ?self.tcx.hir().node_to_string(lifetime_ref.hir_id),
-            span = ?self.tcx.sess.source_map().span_to_string(lifetime_ref.span)
+            span = ?self.tcx.sess.source_map().span_to_diagnostic_string(lifetime_ref.span)
         );
         self.map.defs.insert(lifetime_ref.hir_id, def);
 

compiler/rustc_span/src/lib.rs

@@ -872,7 +872,7 @@ pub fn debug_with_source_map(
     f: &mut fmt::Formatter<'_>,
     source_map: &SourceMap,
 ) -> fmt::Result {
-    write!(f, "{} ({:?})", source_map.span_to_string(span), span.ctxt())
+    write!(f, "{} ({:?})", source_map.span_to_diagnostic_string(span), span.ctxt())
 }
 
 pub fn default_span_debug(span: Span, f: &mut fmt::Formatter<'_>) -> fmt::Result {

compiler/rustc_span/src/source_map.rs

@@ -406,7 +406,7 @@ impl SourceMap {
         }
     }
 
-    pub fn span_to_string(&self, sp: Span) -> String {
+    fn span_to_string(&self, sp: Span, prefer_local: bool) -> String {
         if self.files.borrow().source_files.is_empty() && sp.is_dummy() {
             return "no-location".to_string();
         }
@@ -415,14 +415,26 @@ impl SourceMap {
         let hi = self.lookup_char_pos(sp.hi());
         format!(
             "{}:{}:{}: {}:{}",
-            lo.file.name.prefer_remapped(),
+            if prefer_local { lo.file.name.prefer_local() } else { lo.file.name.prefer_remapped() },
             lo.line,
             lo.col.to_usize() + 1,
             hi.line,
             hi.col.to_usize() + 1,
         )
     }
 
+    /// Format the span location suitable for embedding in build artifacts
+    pub fn span_to_embeddable_string(&self, sp: Span) -> String {
+        self.span_to_string(sp, false)
+    }
+
+    /// Format the span location to be printed in diagnostics. Must not be emitted
+    /// to build artifacts as this may leak local file paths. Use span_to_embeddable_string
+    /// for string suitable for embedding.
+    pub fn span_to_diagnostic_string(&self, sp: Span) -> String {
+        self.span_to_string(sp, true)
+    }
+
     pub fn span_to_filename(&self, sp: Span) -> FileName {
         self.lookup_char_pos(sp.lo()).file.name.clone()
     }

compiler/rustc_span/src/source_map/tests.rs

@@ -193,7 +193,7 @@ fn t8() {
 fn t9() {
     let sm = init_source_map();
     let span = Span::with_root_ctxt(BytePos(12), BytePos(23));
-    let sstr = sm.span_to_string(span);
+    let sstr = sm.span_to_diagnostic_string(span);
 
     assert_eq!(sstr, "blork.rs:2:1: 2:12");
 }