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194471cbd4
Extend the test for pac-ret with clang and LTO by checking that
different branch protection flags are preserved after the LTO step.
There was an issue in older LLVM versions that was causing this to
behave incorrectly.
Tests the LLVM behaviour added in:
1782810b84
49 lines
1.7 KiB
Rust
49 lines
1.7 KiB
Rust
// `-Z branch protection` is an unstable compiler feature which adds pointer-authentication
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// code (PAC), a useful hashing measure for verifying that pointers have not been modified.
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// This test checks that compilation and execution is successful when this feature is activated,
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// with some of its possible extra arguments (bti, pac-ret, leaf) when doing LTO.
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// See https://github.com/rust-lang/rust/pull/88354
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//@ needs-force-clang-based-tests
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//@ only-aarch64
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// Reason: branch protection is not supported on other architectures
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//@ ignore-cross-compile
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// Reason: the compiled binary is executed
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use run_make_support::{clang, env_var, llvm_ar, llvm_objdump, run, rustc, static_lib_name};
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static PAUTH_A_KEY_PATTERN: &'static str = "paciasp";
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static PAUTH_B_KEY_PATTERN: &'static str = "pacibsp";
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fn main() {
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clang()
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.arg("-v")
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.lto("thin")
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.arg("-mbranch-protection=bti+pac-ret+b-key+leaf")
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.arg("-c")
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.out_exe("test.o")
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.input("test.c")
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.run();
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llvm_ar().obj_to_ar().output_input(static_lib_name("test"), "test.o").run();
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rustc()
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.linker_plugin_lto("on")
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.opt_level("2")
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.linker(&env_var("CLANG"))
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.link_arg("-fuse-ld=lld")
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.arg("-Zbranch-protection=bti,pac-ret,leaf")
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.input("test.rs")
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.output("test.bin")
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.run();
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// Check that both a-key and b-key pac-ret survived LTO
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llvm_objdump()
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.disassemble()
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.input("test.bin")
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.run()
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.assert_stdout_contains_regex(PAUTH_A_KEY_PATTERN)
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.assert_stdout_contains_regex(PAUTH_B_KEY_PATTERN);
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// Check that the binary actually runs
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run("test.bin");
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}
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