Auto merge of #126805 - Oneirical:weaves-of-testiny, r=<try>

Migrate `pdb-alt-path`, `mismatching-target-triples` and `mingw-export-call-convention` `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).

Needs MSVC try jobs.

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

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -107,8 +107,6 @@ run-make/manual-link/Makefile
 run-make/many-crates-but-no-match/Makefile
 run-make/metadata-dep-info/Makefile
 run-make/min-global-align/Makefile
-run-make/mingw-export-call-convention/Makefile
-run-make/mismatching-target-triples/Makefile
 run-make/missing-crate-dependency/Makefile
 run-make/mixing-libs/Makefile
 run-make/msvc-opt-minsize/Makefile
@@ -128,7 +126,6 @@ run-make/pass-linker-flags-flavor/Makefile
 run-make/pass-linker-flags-from-dep/Makefile
 run-make/pass-linker-flags/Makefile
 run-make/pass-non-c-like-enum-to-c/Makefile
-run-make/pdb-alt-path/Makefile
 run-make/pdb-buildinfo-cl-cmd/Makefile
 run-make/pgo-gen-lto/Makefile
 run-make/pgo-gen-no-imp-symbols/Makefile

tests/run-make/mingw-export-call-convention/rmake.rs

@@ -0,0 +1,13 @@
+// On windows-gnu, symbol exporting used to fail to export names
+// with no_mangle. #72049 brought this feature up to par with msvc,
+// and this test checks that the symbol "bar" is successfully exported.
+// See https://github.com/rust-lang/rust/issues/50176
+
+//@ only-x86_64-pc-windows-gnu
+
+use run_make_support::{llvm_readobj, rustc};
+
+fn main() {
+    rustc().input("foo.rs").run();
+    llvm_readobj().arg("--all").input("libfoo.dll.a").run().assert_stdout_contains("bar");
+}

tests/run-make/mismatching-target-triples/rmake.rs

@@ -0,0 +1,15 @@
+// In this test, foo links against 32-bit architecture, and then, bar, which depends
+// on foo, links against 64-bit architecture, causing a metadata mismatch due to the
+// differences in target architectures. This used to cause an internal compiler error,
+// now replaced by a clearer normal error message. This test checks that this aforementioned
+// error message is used.
+// See https://github.com/rust-lang/rust/issues/10814
+
+use run_make_support::rustc;
+
+fn main() {
+    rustc().input("foo.rs").target("i686-unknown-linux-gnu").run();
+    rustc().input("bar.rs").target("x86_64-unknown-linux-gnu").run_fail().assert_stderr_contains(
+        r#"couldn't find crate `foo` with expected target triple x86_64-unknown-linux-gnu"#,
+    );
+}

tests/run-make/pdb-alt-path/rmake.rs

@@ -0,0 +1,39 @@
+// The information inside a .exe file contains a string of the PDB file name.
+// This could be a security concern if the full path was exposed, as it could
+// reveal information about the filesystem where the bin was first compiled.
+// This should only be overridden by `-Clink-arg=/PDBALTPATH:...` - this test
+// checks that no full file paths are exposed and that the override flag is respected.
+// See https://github.com/rust-lang/rust/pull/121297
+
+//@ only-x86_64-pc-windows-msvc
+
+use run_make_support::{bin_name, invalid_utf8_contains, invalid_utf8_not_contains, run, rustc};
+
+fn main() {
+    // Test that we don't have the full path to the PDB file in the binary
+    rustc()
+        .input("main.rs")
+        .arg("-g")
+        .crate_name("my_crate_name")
+        .crate_type("bin")
+        .arg("-Cforce-frame-pointers")
+        .run();
+    invalid_utf8_contains(&bin_name("my_crate_name"), "my_crate_name.pdb");
+    invalid_utf8_not_contains(&bin_name("my_crate_name"), r#"\my_crate_name.pdb"#);
+    // Test that backtraces still can find debuginfo by checking that they contain symbol names and
+    // source locations.
+    let out = run(&bin_name("my_crate_name"));
+    out.assert_stdout_contains("my_crate_name::fn_in_backtrace");
+    out.assert_stdout_contains("main.rs:15");
+    // Test that explicitly passed `-Clink-arg=/PDBALTPATH:...` is respected
+    rustc()
+        .input("main.rs")
+        .arg("-g")
+        .crate_name("my_crate_name")
+        .crate_type("bin")
+        .link_arg("/PDBALTPATH:abcdefg.pdb")
+        .arg("-Cforce-frame-pointers")
+        .run();
+    invalid_utf8_contains(&bin_name("my_crate_name"), "abcdefg.pdb");
+    invalid_utf8_not_contains(&bin_name("my_crate_name"), "my_crate_name.pdb");
+}