Rollup merge of rust-lang#125787 - Oneirical:infinite-test-a-novel, r=jieyouxu

Migrate `bin-emit-no-symbols` `run-make` test to `rmake`

Part of rust-lang#121876 and the associated [Google Summer of Code project](https://blog.rust-lang.org/2024/05/01/gsoc-2024-selected-projects.html).

try-job: x86_64-msvc
try-job: armhf-gnu

Author: fmease

Diff for: src/tools/run-make-support/src/llvm.rs

@@ -2,8 +2,8 @@ use std::path::{Path, PathBuf};
 
 use crate::{env_var, Command};
 
-/// Construct a new `llvm-readobj` invocation. This assumes that `llvm-readobj` is available
-/// at `$LLVM_BIN_DIR/llvm-readobj`.
+/// Construct a new `llvm-readobj` invocation with the `GNU` output style.
+/// This assumes that `llvm-readobj` is available at `$LLVM_BIN_DIR/llvm-readobj`.
 #[track_caller]
 pub fn llvm_readobj() -> LlvmReadobj {
     LlvmReadobj::new()
@@ -70,13 +70,24 @@ pub fn llvm_bin_dir() -> PathBuf {
 }
 
 impl LlvmReadobj {
-    /// Construct a new `llvm-readobj` invocation. This assumes that `llvm-readobj` is available
-    /// at `$LLVM_BIN_DIR/llvm-readobj`.
+    /// Construct a new `llvm-readobj` invocation with the `GNU` output style.
+    /// This assumes that `llvm-readobj` is available at `$LLVM_BIN_DIR/llvm-readobj`.
     #[track_caller]
     pub fn new() -> Self {
         let llvm_readobj = llvm_bin_dir().join("llvm-readobj");
         let cmd = Command::new(llvm_readobj);
-        Self { cmd }
+        let mut readobj = Self { cmd };
+        readobj.elf_output_style("GNU");
+        readobj
+    }
+
+    /// Specify the format of the ELF information.
+    ///
+    /// Valid options are `LLVM` (default), `GNU`, and `JSON`.
+    pub fn elf_output_style(&mut self, style: &str) -> &mut Self {
+        self.cmd.arg("--elf-output-style");
+        self.cmd.arg(style);
+        self
     }
 
     /// Provide an input file.
@@ -90,6 +101,13 @@ impl LlvmReadobj {
         self.cmd.arg("--file-header");
         self
     }
+
+    /// Specify the section to display.
+    pub fn section(&mut self, section: &str) -> &mut Self {
+        self.cmd.arg("--string-dump");
+        self.cmd.arg(section);
+        self
+    }
 }
 
 impl LlvmProfdata {

Diff for: src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -83,7 +83,6 @@ 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

Diff for: tests/run-make/issue-51671/app.rs renamed to tests/run-make/bin-emit-no-symbols/app.rs

@@ -0,0 +1,16 @@
+// 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::{llvm_readobj, rustc};
+
+fn main() {
+    rustc().emit("obj").input("app.rs").run();
+    let out = llvm_readobj().input("app.o").arg("--symbols").run();
+    out.assert_stdout_contains("rust_begin_unwind");
+    out.assert_stdout_contains("rust_eh_personality");
+    out.assert_stdout_contains("__rg_oom");
+}