[clang] [analyzer] Fix false positive for mutexes inheriting mutex_base (PR #106240)
DonĂ¡t Nagy via cfe-commits
cfe-commits at lists.llvm.org
Wed Aug 28 01:59:46 PDT 2024
================
@@ -241,10 +241,14 @@ BlockInCriticalSectionChecker::checkDescriptorMatch(const CallEvent &Call,
return std::nullopt;
}
-static const MemRegion *skipBaseClassRegion(const MemRegion *Reg) {
- while (const auto *BaseClassRegion = dyn_cast<CXXBaseObjectRegion>(Reg)) {
+static const MemRegion *skipStdBaseClassRegion(const MemRegion *Reg) {
+ do {
+ assert(Reg);
+ const auto *BaseClassRegion = dyn_cast<CXXBaseObjectRegion>(Reg);
+ if (!BaseClassRegion || !BaseClassRegion->getDecl()->isInStdNamespace())
----------------
NagyDonat wrote:
`<pedantery>`
> isInStdNamespace only works if the decl is exactly within std. Any nested namespaces beyond std, or class scopes are rejected even if their parents reside within std.
IIRC `isInStdNamespace` also accepts anonymous subnamespaces of `std` (so that kind of implementation detail won't cause problems at least).
`</pedantery>`
https://github.com/llvm/llvm-project/pull/106240
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