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Conditionally export msan symbols only if they are defined

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* `__msan_keep_going` is defined when `-Zsanitizer-recover=memory`.
* `__msan_track_origins` is defined when `-Zsanitizer-memory-track-origins`.
This commit is contained in:
Gary Guo 2022-04-18 02:58:33 +01:00
parent c475117ffb
commit e2fdb84df7
1 changed files with 11 additions and 3 deletions
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14
compiler/rustc_codegen_ssa/src/back/symbol_export.rs
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@ -241,10 +241,18 @@ fn exported_symbols_provider_local<'tcx>(
}
if tcx.sess.opts.debugging_opts.sanitizer.contains(SanitizerSet::MEMORY) {
// Similar to profiling, preserve weak msan symbol during LTO.
const MSAN_WEAK_SYMBOLS: [&str; 2] = ["__msan_track_origins", "__msan_keep_going"];
let mut msan_weak_symbols = Vec::new();
symbols.extend(MSAN_WEAK_SYMBOLS.iter().map(|sym| {
// Similar to profiling, preserve weak msan symbol during LTO.
if tcx.sess.opts.debugging_opts.sanitizer_recover.contains(SanitizerSet::MEMORY) {
msan_weak_symbols.push("__msan_keep_going");
}
if tcx.sess.opts.debugging_opts.sanitizer_memory_track_origins != 0 {
msan_weak_symbols.push("__msan_track_origins");
}
symbols.extend(msan_weak_symbols.into_iter().map(|sym| {
let exported_symbol = ExportedSymbol::NoDefId(SymbolName::new(tcx, sym));
(
exported_symbol,