Rollup merge of rust-lang#97085 - rylev:test-issue-33172, r=wesleywiser

Add a test for issue rust-lang#33172

Adds a test confirming that rust-lang#33172 has been fixed.

CDB has some surprising results as it looks like the supposedly unmangled static's symbol name is prefixed when it shouldn't be.

r? ``@wesleywiser``

Closes rust-lang#33172

src/test/debuginfo/no_mangle-info.rs

@@ -0,0 +1,37 @@
+// compile-flags:-g
+
+// === GDB TESTS ===================================================================================
+// gdb-command:run
+// gdb-command:whatis TEST
+// gdb-check:type = u64
+// gdb-command:whatis no_mangle_info::namespace::OTHER_TEST
+// gdb-check:type = u64
+
+// === LLDB TESTS ==================================================================================
+// lldb-command:run
+// lldb-command:expr TEST
+// lldb-check: (unsigned long) $0 = 3735928559
+// lldb-command:expr no_mangle_test::namespace::OTHER_TEST
+// lldb-check: (unsigned long) $0 = 42
+
+// === CDB TESTS ==================================================================================
+// cdb-command: g
+// Note: LLDB and GDB allow referring to items that are in the same namespace of the symbol
+// we currently have a breakpoint on in an unqualified way. CDB does not, and thus we need to
+// refer to it in a fully qualified way.
+// cdb-command: dx a!no_mangle_info::TEST
+// cdb-check: a!no_mangle_info::TEST : 0xdeadbeef [Type: unsigned __int64]
+// cdb-command: dx a!no_mangle_info::namespace::OTHER_TEST
+// cdb-check: a!no_mangle_info::namespace::OTHER_TEST : 0x2a [Type: unsigned __int64]
+
+#[no_mangle]
+pub static TEST: u64 = 0xdeadbeef;
+
+pub mod namespace {
+    pub static OTHER_TEST: u64 = 42;
+}
+
+pub fn main() {
+    println!("TEST: {}", TEST);
+    println!("OTHER TEST: {}", namespace::OTHER_TEST); // #break
+}