vsavchenko added inline comments.
================
Comment at: clang/lib/StaticAnalyzer/Checkers/SmartPtrModeling.cpp:94-103
const auto *RecordDecl = MethodDecl->getParent();
- if (!RecordDecl || !RecordDecl->getDeclContext()->isStdNamespace())
+ return isStdSmartPtr(RecordDecl);
+}
+
+bool isStdSmartPtr(const CXXRecordDecl *RD) {
+ if (!RD || !RD->getDeclContext()->isStdNamespace())
return false;
----------------
That's great!
================
Comment at: clang/lib/StaticAnalyzer/Checkers/SmartPtrModeling.cpp:188-226
+ // Check the first arg, if it is of std::unique_ptr type.
+ assert(Call.getNumArgs() == 2 && "std::swap should have two arguments");
+ const Expr *FirstArg = Call.getArgExpr(0);
+ if (!smartptr::isStdSmartPtr(FirstArg->getType()->getAsCXXRecordDecl())) {
+ return false;
+ }
+ const MemRegion *FirstArgThisRegion = Call.getArgSVal(0).getAsRegion();
----------------
Maybe a separate method then?
================
Comment at: clang/lib/StaticAnalyzer/Checkers/SmartPtrModeling.cpp:217
+ if (&BR.getBugType() != smartptr::getNullDereferenceBugType() ||
+ !BR.isInteresting(FirstArgThisRegion))
+ return;
----------------
Wait, and what if the second argument is interesting?
================
Comment at: clang/test/Analysis/smart-ptr-text-output.cpp:80
void derefOnStdSwappedNullPtr() {
std::unique_ptr<A> P; // expected-note {{Default constructed smart pointer
'P' is null}}
std::unique_ptr<A> PNull; // expected-note {{Default constructed smart
pointer 'PNull' is null}}
----------------
I know that this case existed before, but can we initialize `P` with non-null,
so that the warning is a bit more life-like?
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D104300/new/
https://reviews.llvm.org/D104300
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