Add support for a new attribute `#[debugger_visualizer]` to support embedding debugger visualizers into a generated PDB.

Cleanup `DebuggerVisualizerFile` type and other minor cleanup of queries.

Merge the queries for debugger visualizers into a single query.

Revert move of `resolve_path` to `rustc_builtin_macros`. Update dependencies in Cargo.toml for `rustc_passes`.

Respond to PR comments. Load visualizer files into opaque bytes `Vec<u8>`. Debugger visualizers for dynamically linked crates should not be embedded in the current crate.

Update the unstable book with the new feature. Add the tracking issue for the debugger_visualizer feature.

Respond to PR comments and minor cleanups.

1 files changed, 17 insertions, 1 deletions

diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs
index 5bc95614c19..7b7e09208a2 100644
--- a/compiler/rustc_codegen_ssa/src/base.rs
+++ b/compiler/rustc_codegen_ssa/src/base.rs
@@ -847,7 +847,13 @@ impl CrateInfo {
             missing_lang_items: Default::default(),
             dependency_formats: tcx.dependency_formats(()).clone(),
             windows_subsystem,
+            debugger_visualizers: Default::default(),
         };
+        let debugger_visualizers = tcx.debugger_visualizers(LOCAL_CRATE).clone();
+        if !debugger_visualizers.is_empty() {
+            info.debugger_visualizers.insert(LOCAL_CRATE, debugger_visualizers);
+        }
+
         let lang_items = tcx.lang_items();
 
         let crates = tcx.crates(());
@@ -862,7 +868,9 @@ impl CrateInfo {
             info.native_libraries
                 .insert(cnum, tcx.native_libraries(cnum).iter().map(Into::into).collect());
             info.crate_name.insert(cnum, tcx.crate_name(cnum));
-            info.used_crate_source.insert(cnum, tcx.used_crate_source(cnum).clone());
+
+            let used_crate_source = tcx.used_crate_source(cnum);
+            info.used_crate_source.insert(cnum, used_crate_source.clone());
             if tcx.is_compiler_builtins(cnum) {
                 info.compiler_builtins = Some(cnum);
             }
@@ -883,6 +891,14 @@ impl CrateInfo {
             let missing =
                 missing.iter().cloned().filter(|&l| lang_items::required(tcx, l)).collect();
             info.missing_lang_items.insert(cnum, missing);
+
+            // Only include debugger visualizer files from crates that will be statically linked.
+            if used_crate_source.rlib.is_some() || used_crate_source.rmeta.is_some() {
+                let debugger_visualizers = tcx.debugger_visualizers(cnum).clone();
+                if !debugger_visualizers.is_empty() {
+                    info.debugger_visualizers.insert(cnum, debugger_visualizers);
+                }
+            }
         }
 
         info