run_make_support nm implementation + bin-emit-no-symbols rmake rewrite

library/backtrace

@@ -1 +1 @@
-Subproject commit 72265bea210891ae47bbe6d4f17b493ef0606619
+Subproject commit 5e05efa87905fb5b351a2bc5644d60c57d6d9327

src/doc/book

@@ -1 +1 @@
-Subproject commit 45c1a6d69edfd1fc91fb7504cb73958dbd09441e
+Subproject commit 5e9051f71638aa941cd5dda465e25c61cde9594f

src/doc/edition-guide

@@ -1 +1 @@
-Subproject commit cb58c430b4e8054c2cb81d2d4434092c482a93d8
+Subproject commit bbaabbe088e21a81a0d9ae6757705020d5d7b416

src/doc/reference

@@ -1 +1 @@
-Subproject commit 0b805c65804019b0ac8f2fe3117afad82a6069b8
+Subproject commit 6019b76f5b28938565b251bbba0bf5cc5c43d863

src/doc/rust-by-example

@@ -1 +1 @@
-Subproject commit b1d97bd6113aba732b2091ce093c76f2d05bb8a0
+Subproject commit 4840dca06cadf48b305d3ce0aeafde7f80933f80

src/doc/rustc-dev-guide

@@ -1 +1 @@
-Subproject commit aec82168dd3121289a194b381f56076fc789a4d2
+Subproject commit 6a7374bd87cbac0f8be4fd4877d8186d9c313985

src/tools/cargo

@@ -1 +1 @@
-Subproject commit a1f47ec3f7cd076986f1bfcd7061f2e8cb1a726e
+Subproject commit 431db31d0dbeda320caf8ef8535ea48eb3093407

src/tools/run-make-support/src/nm/mod.rs

@@ -0,0 +1,48 @@
+use crate::{fs_wrapper, object};
+use object::{Object, ObjectSection};
+use std::path::Path;
+
+#[derive(Debug)]
+pub struct Nm {
+    file: Option<object::File>,
+}
+
+pub fn nm() -> Nm {
+    Nm::new()
+}
+
+impl Nm {
+    /// Construct a bare `nm` invocation.
+    pub fn new() -> Self {
+        Self { file: None }
+    }
+
+    /// Specify the file to analyze the symbols of.
+    pub fn input<P: AsRef<Path>>(&mut self, path: P) -> &mut Self {
+        &mut Self {
+            file: Some(
+                object::File::parse(fs_wrapper::read(path))
+                    .expect(format!("Failed to parse ELF file at {:?}", path.as_ref().display())),
+            ),
+        }
+    }
+
+    /// Collect all symbols of an object file into a String.
+    pub fn collect_symbols(&self) -> String {
+        let object_file = self.file;
+        let mut symbols_str = String::new();
+        for section in object_file.sections() {
+            if let Ok(ObjectSection::SymbolTable(st)) = section.parse::<object::SymbolTable>() {
+                for symbol in st.symbols() {
+                    symbols_str.push_str(&format!(
+                        "{:016x} {:?} {}\n",
+                        symbol.address(),
+                        symbol.kind(),
+                        symbol.name()
+                    ));
+                }
+            }
+        }
+        symbols_str
+    }
+}

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -84,7 +84,6 @@ run-make/issue-37839/Makefile
 run-make/issue-40535/Makefile
 run-make/issue-47384/Makefile
 run-make/issue-47551/Makefile
-run-make/issue-51671/Makefile
 run-make/issue-68794-textrel-on-minimal-lib/Makefile
 run-make/issue-69368/Makefile
 run-make/issue-83045/Makefile

tests/run-make/bin-emit-no-symbols/rmake.rs

@@ -0,0 +1,19 @@
+// When setting the crate type as a "bin" (in app.rs),
+// this could cause a bug where some symbols would not be
+// emitted in the object files. This has been fixed, and
+// this test checks that the correct symbols have been successfully
+// emitted inside the object files.
+// See https://github.com/rust-lang/rust/issues/51671
+
+use run_make_support::{nm, rustc, tmp_dir};
+
+fn main() {
+    rustc().emit("obj").input("app.rs").run();
+    //FIXME(Oneirical): This should eventually be rmake_out_path
+    let nm = nm(tmp_dir().join("app.o"));
+    assert!(
+        nm.contains("rust_begin_unwind")
+            && nm.contains("rust_eh_personality")
+            && nm.contains("__rg_oom")
+    );
+}

tests/run-make/issue-51671/Makefile

@@ -1,9 +0,0 @@
-include ../tools.mk
-
-# ignore-windows-msvc
-
-all:
-	$(RUSTC) --emit=obj app.rs
-	nm $(TMPDIR)/app.o | $(CGREP) rust_begin_unwind
-	nm $(TMPDIR)/app.o | $(CGREP) rust_eh_personality
-	nm $(TMPDIR)/app.o | $(CGREP) __rg_oom