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// `-Z branch protection` is an unstable compiler feature which adds pointer-authentication
// code (PAC), a useful hashing measure for verifying that pointers have not been modified.
// This test checks that compilation and execution is successful when this feature is activated,
// with some of its possible extra arguments (bti, pac-ret, leaf) when doing LTO.
// See https://github.com/rust-lang/rust/pull/88354
//@ needs-force-clang-based-tests
//@ only-aarch64
// Reason: branch protection is not supported on other architectures
//@ ignore-cross-compile
// Reason: the compiled binary is executed
use run_make_support::{clang, env_var, llvm_ar, llvm_objdump, run, rustc, static_lib_name};
static PAUTH_A_KEY_PATTERN: &'static str = "paciasp";
static PAUTH_B_KEY_PATTERN: &'static str = "pacibsp";
fn main() {
clang()
.arg("-v")
.lto("thin")
.arg("-mbranch-protection=bti+pac-ret+b-key+leaf")
.arg("-c")
.out_exe("test.o")
.input("test.c")
.run();
llvm_ar().obj_to_ar().output_input(static_lib_name("test"), "test.o").run();
rustc()
.linker_plugin_lto("on")
.opt_level("2")
.linker(&env_var("CLANG"))
.link_arg("-fuse-ld=lld")
.arg("-Zbranch-protection=bti,pac-ret,leaf")
.input("test.rs")
.output("test.bin")
.run();
// Check that both a-key and b-key pac-ret survived LTO
llvm_objdump()
.disassemble()
.input("test.bin")
.run()
.assert_stdout_contains_regex(PAUTH_A_KEY_PATTERN)
.assert_stdout_contains_regex(PAUTH_B_KEY_PATTERN);
// Check that the binary actually runs
run("test.bin");
}
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