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[UBSan] Move type:*=sanitize handling. #142006

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Merged
merged 3 commits into from
May 29, 2025
Merged

[UBSan] Move type:*=sanitize handling. #142006

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c19361a
[𝘀𝗽𝗿] initial version
qinkunbao May 29, 2025
19ad9c8
Fix argument.
qinkunbao May 29, 2025
d501e34
Modify the tests.
qinkunbao May 29, 2025
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3 changes: 1 addition & 2 deletions clang/lib/AST/ASTContext.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -875,8 +875,7 @@ ASTContext::insertCanonicalTemplateTemplateParmDeclInternal(
bool ASTContext::isTypeIgnoredBySanitizer(const SanitizerMask &Mask,
const QualType &Ty) const {
std::string TyName = Ty.getUnqualifiedType().getAsString(getPrintingPolicy());
return NoSanitizeL->containsType(Mask, TyName) &&
!NoSanitizeL->containsType(Mask, TyName, "sanitize");
return NoSanitizeL->containsType(Mask, TyName);
}

TargetCXXABI::Kind ASTContext::getCXXABIKind() const {
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6 changes: 5 additions & 1 deletion clang/lib/Basic/NoSanitizeList.cpp
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Expand Up @@ -34,7 +34,11 @@ bool NoSanitizeList::containsGlobal(SanitizerMask Mask, StringRef GlobalName,

bool NoSanitizeList::containsType(SanitizerMask Mask, StringRef MangledTypeName,
StringRef Category) const {
return SSCL->inSection(Mask, "type", MangledTypeName, Category);
auto NoSan = SSCL->inSectionBlame(Mask, "type", FileName, Category);
if (NoSan == llvm::SpecialCaseList::NotFound)
return false;
auto San = SSCL->inSectionBlame(Mask, "type", FileName, "sanitize");
return San == llvm::SpecialCaseList::NotFound || NoSan > San;
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@JustinStitt JustinStitt May 29, 2025

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PR looks good to me. Only quirk is NoSan > San. The autos slightly obscure the fact these are pair types. Thankfully, the FileIdx portion of the pair is properly mapped left-to-right alongside all the -fsanitize-ignorelist= arguments within SpecialCaseList::createInternal. This means we'll get the obvious behavior of most recent SCL file which is then further delineated by line number.

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@qinkunbao qinkunbao May 29, 2025

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Thanks for the review. Given this part is going to be refactored in #142027 , I am going to merge this PR and change "auto" to "std::pair<unsigned, unsigned>" in #142027

}

bool NoSanitizeList::containsFunction(SanitizerMask Mask,
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