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MemTagSanitizer Support

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Adds support for the LLVM MemTagSanitizer.
This commit is contained in:
Ivan Lozano
2021-12-03 16:11:13 -05:00
parent 5569757491
commit 568aeda9e9
15 changed files with 67 additions and 6 deletions
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13
compiler/rustc_codegen_llvm/src/attributes.rs
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@@ -55,6 +55,19 @@ pub fn sanitize<'ll>(cx: &CodegenCx<'ll, '_>, no_sanitize: SanitizerSet, llfn: &
if enabled.contains(SanitizerSet::HWADDRESS) {
llvm::Attribute::SanitizeHWAddress.apply_llfn(Function, llfn);
}
if enabled.contains(SanitizerSet::MEMTAG) {
// Check to make sure the mte target feature is actually enabled.
let sess = cx.tcx.sess;
let features = llvm_util::llvm_global_features(sess).join(",");
let mte_feature_enabled = features.rfind("+mte");
let mte_feature_disabled = features.rfind("-mte");
if mte_feature_enabled.is_none() || (mte_feature_disabled > mte_feature_enabled) {
sess.err("`-Zsanitizer=memtag` requires `-Ctarget-feature=+mte`");
}
llvm::Attribute::SanitizeMemTag.apply_llfn(Function, llfn);
}
}
/// Tell LLVM to emit or not emit the information necessary to unwind the stack for the function.