| // Verifies that `Session::default_visibility` is affected when using the related cmdline |
| // flag. This is a regression test for https://github.com/rust-lang/compiler-team/issues/782. See |
| // also https://github.com/rust-lang/rust/issues/73295 and |
| // https://github.com/rust-lang/rust/issues/37530. |
| |
| //@ revisions:DEFAULT HIDDEN PROTECTED INTERPOSABLE |
| //@[HIDDEN] compile-flags: -Zdefault-visibility=hidden |
| //@[PROTECTED] compile-flags: -Zdefault-visibility=protected |
| //@[INTERPOSABLE] compile-flags: -Zdefault-visibility=interposable |
| |
| // The test scenario is specifically about visibility of symbols exported out of dynamically linked |
| // libraries. |
| #![crate_type = "dylib"] |
| |
| // The test scenario needs to use a Rust-public, but non-explicitly-exported symbol |
| // (e.g. the test doesn't use `#[no_mangle]`, because currently it implies that |
| // the symbol should be exported; we don't want that - we want to test the *default* |
| // export setting instead). |
| #[used] |
| pub static tested_symbol: [u8; 6] = *b"foobar"; |
| |
| // Exact LLVM IR differs depending on the target triple (e.g. `hidden constant` |
| // vs `internal constant` vs `constant`). Because of this, we only apply the |
| // specific test expectations below to one specific target triple. If needed, |
| // additional targets can be covered by adding copies of this test file with |
| // a different `only-X` directive. |
| // |
| //@ only-x86_64-unknown-linux-gnu |
| |
| // HIDDEN: @{{.*}}default_visibility{{.*}}tested_symbol{{.*}} = hidden constant |
| // PROTECTED: @{{.*}}default_visibility{{.*}}tested_symbol{{.*}} = protected constant |
| // INTERPOSABLE: @{{.*}}default_visibility{{.*}}tested_symbol{{.*}} = constant |
| // DEFAULT: @{{.*}}default_visibility{{.*}}tested_symbol{{.*}} = constant |
| |
| pub fn do_memcmp(left: &[u8], right: &[u8]) -> i32 { |
| left.cmp(right) as i32 |
| } |
| |
| // CHECK: define {{.*}} @{{.*}}do_memcmp{{.*}} { |
| // CHECK: } |
| |
| // `do_memcmp` should invoke core::intrinsic::compare_bytes which emits a call |
| // to the C symbol `memcmp` (at least on x86_64-unknown-linux-gnu). This symbol |
| // should *not* be declared hidden or protected. |
| |
| // HIDDEN: declare i32 @memcmp |
| // PROTECTED: declare i32 @memcmp |
| // INTERPOSABLE: declare i32 @memcmp |
| // DEFAULT: declare i32 @memcmp |
