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Allow disabling ASan instrumentation for globals

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AddressSanitizer adds instrumentation to global variables unless the
[`no_sanitize_address`](https://llvm.org/docs/LangRef.html#global-attributes)
attribute is set on them.

This commit extends the existing `#[no_sanitize(address)]` attribute to
set this; previously it only had the desired effect on functions.
This commit is contained in:
Daniel Bertalan 2024-07-08 15:49:50 +02:00
parent 00ed73cdc0
commit 204b2281fa
10 changed files with 137 additions and 34 deletions
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9
compiler/rustc_codegen_llvm/src/base.rs
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@ -172,3 +172,12 @@ pub(crate) fn visibility_to_llvm(linkage: Visibility) -> llvm::Visibility {
Visibility::Protected => llvm::Visibility::Protected,
}
}
pub(crate) fn set_variable_sanitizer_attrs(llval: &Value, attrs: &CodegenFnAttrs) {
if attrs.no_sanitize.contains(SanitizerSet::ADDRESS) {
unsafe { llvm::LLVMRustSetNoSanitizeAddress(llval) };
}
if attrs.no_sanitize.contains(SanitizerSet::HWADDRESS) {
unsafe { llvm::LLVMRustSetNoSanitizeHWAddress(llval) };
}
}