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KCFI: Add KCFI arity indicator support

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Adds KCFI arity indicator support to the Rust compiler (see rust-lang/rust#138311,
https://github.com/llvm/llvm-project/pull/121070, and
https://lore.kernel.org/lkml/CANiq72=3ghFxy8E=AU9p+0imFxKr5iU3sd0hVUXed5BA+KjdNQ@mail.gmail.com/).
This commit is contained in:
Ramon de C Valle
2025-03-11 19:04:35 +00:00
parent bad13a970a
commit a98546b961
14 changed files with 148 additions and 0 deletions
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9
compiler/rustc_session/src/session.rs
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@@ -381,6 +381,10 @@ impl Session {
self.opts.unstable_opts.sanitizer_cfi_normalize_integers == Some(true)
}
pub fn is_sanitizer_kcfi_arity_enabled(&self) -> bool {
self.opts.unstable_opts.sanitizer_kcfi_arity == Some(true)
}
pub fn is_sanitizer_kcfi_enabled(&self) -> bool {
self.opts.unstable_opts.sanitizer.contains(SanitizerSet::KCFI)
}
@@ -1211,6 +1215,11 @@ fn validate_commandline_args_with_session_available(sess: &Session) {
}
}
// KCFI arity indicator requires KCFI.
if sess.is_sanitizer_kcfi_arity_enabled() && !sess.is_sanitizer_kcfi_enabled() {
sess.dcx().emit_err(errors::SanitizerKcfiArityRequiresKcfi);
}
// LLVM CFI pointer generalization requires CFI or KCFI.
if sess.is_sanitizer_cfi_generalize_pointers_enabled() {
if !(sess.is_sanitizer_cfi_enabled() || sess.is_sanitizer_kcfi_enabled()) {