Auto merge of #128065 - Oneirical:great-testilence, r=<try>

Migrate `c-unwind-abi-catch-lib-panic`, `foreign-rust-exceptions` and `export-executable-symbols` `run-make` tests to rmake

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

Please try:

try-job: x86_64-msvc
try-job: i686-mingw

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -1,7 +1,6 @@
 run-make/branch-protection-check-IBT/Makefile
 run-make/c-dynamic-dylib/Makefile
 run-make/c-dynamic-rlib/Makefile
-run-make/c-unwind-abi-catch-lib-panic/Makefile
 run-make/cat-and-grep-sanity-check/Makefile
 run-make/cdylib-dylib-linkage/Makefile
 run-make/compiler-rt-works-on-mingw/Makefile
@@ -14,7 +13,6 @@ run-make/dep-info-spaces/Makefile
 run-make/dep-info/Makefile
 run-make/dump-ice-to-disk/Makefile
 run-make/emit-to-stdout/Makefile
-run-make/export-executable-symbols/Makefile
 run-make/extern-diff-internal-name/Makefile
 run-make/extern-flag-disambiguates/Makefile
 run-make/extern-fn-reachable/Makefile
@@ -23,7 +21,6 @@ run-make/extern-multiple-copies2/Makefile
 run-make/fmt-write-bloat/Makefile
 run-make/foreign-double-unwind/Makefile
 run-make/foreign-exceptions/Makefile
-run-make/foreign-rust-exceptions/Makefile
 run-make/incr-add-rust-src-component/Makefile
 run-make/incr-foreign-head-span/Makefile
 run-make/interdependent-c-libraries/Makefile

tests/run-make/c-unwind-abi-catch-lib-panic/rmake.rs

@@ -0,0 +1,36 @@
+// Exercise unwinding a panic. This catches a panic across an FFI (foreign function interface)
+// boundary and downcasts it into an integer.
+// The Rust code that panics is in a separate crate.
+// See https://github.com/rust-lang/rust/commit/baf227ea0c1e07fc54395a51e4b3881d701180cb
+
+//@ ignore-cross-compile
+// Reason: the compiled binary is executed
+//@ needs-unwind
+// Reason: this test exercises unwinding a panic
+
+use run_make_support::{cc, is_msvc, llvm_ar, run, rustc};
+
+fn main() {
+    // Compile `add.c` into an object file.
+    if is_msvc() {
+        cc().arg("-c").out_exe("add").input("add.c").run();
+    } else {
+        cc().arg("-v").arg("-c").out_exe("add.o").input("add.c").run();
+    };
+
+    // Compile `panic.rs` into an object file.
+    // Note that we invoke `rustc` directly, so we may emit an object rather
+    // than an archive. We'll do that later.
+    rustc().emit("obj").input("panic.rs").run();
+
+    // Now, create an archive using these two objects.
+    if is_msvc() {
+        llvm_ar().obj_to_ar().args(&["libadd.a", "add.obj", "panic.o"]).run();
+    } else {
+        llvm_ar().obj_to_ar().args(&["libadd.a", "add.o", "panic.o"]).run();
+    };
+
+    // Compile `main.rs`, which will link into our library, and run it.
+    rustc().input("main.rs").run();
+    run("main");
+}

tests/run-make/export-executable-symbols/rmake.rs

@@ -0,0 +1,18 @@
+// The unstable flag `-Z export-executable-symbols` exports symbols from executables, as if
+// they were dynamic libraries. This test is a simple smoke test to check that this feature
+// works by using it in compilation, then checking that the output binary contains the exported
+// symbol.
+// See https://github.com/rust-lang/rust/pull/85673
+
+//@ ignore-wasm32
+//@ ignore-wasm64
+//@ ignore-none
+// Reason: no-std is not supported
+//FIXME(Oneirical): try it on more than only-linux
+
+use run_make_support::{llvm_readobj, rustc};
+
+fn main() {
+    rustc().arg("-Zexport-executable-symbols").input("main.rs").crate_type("bin").run();
+    llvm_readobj().symbols().input("main").run().assert_stdout_contains("exported_symbol");
+}

tests/run-make/foreign-rust-exceptions/rmake.rs

@@ -0,0 +1,23 @@
+// Rust exceptions can be foreign (from C code, in this test) or local. Foreign
+// exceptions should not be caught, as that can cause undefined behaviour. Instead
+// of catching them, #102721 made it so that the binary panics in execution with a helpful message.
+// This test checks that the correct message appears and that execution fails when trying to catch
+// a foreign exception.
+// See https://github.com/rust-lang/rust/issues/102715
+
+//@ ignore-cross-compile
+// Reason: the compiled binary is executed
+//@ needs-unwind
+// Reason: unwinding panics is exercised in this test
+
+//FIXME(Oneirical): ignore-i686-pc-windows-gnu
+// This test doesn't work on 32-bit MinGW as cdylib has its own copy of unwinder
+// so cross-DLL unwinding does not work.
+
+use run_make_support::{run_fail, rustc};
+
+fn main() {
+    rustc().input("bar.rs").crate_type("cdylib").run();
+    rustc().input("foo.rs").run();
+    run_fail("foo").assert_stderr_contains("Rust cannot catch foreign exceptions");
+}