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//! Tests that MTE tags and values stored in the top byte of a pointer (TBI) are preserved across
//! FFI boundaries (C <-> Rust). This test does not require MTE: whilst the test will use MTE if
//! available, if it is not, arbitrary tag bits are set using TBI.
//@ ignore-test (FIXME #141600)
//
// FIXME(#141600): this test is broken in two ways:
// 1. This test triggers `-Wincompatible-pointer-types` on GCC 14.
// 2. This test requires ARMv8.5+ w/ MTE extensions enabled, but GHA CI runner hardware do not have
// this enabled.
//@ only-aarch64-unknown-linux-gnu
// Reason: this test is only valid for AArch64 with `gcc`. The linker must be explicitly specified
// when cross-compiling, so it is limited to `aarch64-unknown-linux-gnu`.
use run_make_support::{dynamic_lib_name, extra_c_flags, gcc, run, rustc, target};
fn main() {
run_test("int");
run_test("float");
run_test("string");
run_test("function");
}
fn run_test(variant: &str) {
let flags = {
let mut flags = extra_c_flags();
flags.push("-march=armv8.5-a+memtag");
flags
};
println!("{variant} test...");
rustc().input(format!("foo_{variant}.rs")).linker("aarch64-linux-gnu-gcc").run();
gcc()
.input(format!("bar_{variant}.c"))
.input(dynamic_lib_name("foo"))
.out_exe("test")
.args(&flags)
.run();
run("test");
}
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