================
@@ -864,6 +864,74 @@ void FactsGenerator::handleImplicitObjectFieldUses(const
Expr *Call,
});
}
+void FactsGenerator::handleLifetimeCaptureBy(const FunctionDecl *FD,
+ ArrayRef<const Expr *> Args) {
+ bool isInstance = false;
+ if (const auto *Method = dyn_cast<CXXMethodDecl>(FD);
+ Method && Method->isInstance() && !isa<CXXConstructorDecl>(FD)) {
+ isInstance = true;
+ }
+ auto getArgCaptureBy = [FD,
+ isInstance](unsigned I) -> LifetimeCaptureByAttr * {
+ const ParmVarDecl *PVD = nullptr;
+ // FIXME: Add support for capture_by on function declarations
+ if (isInstance) {
+ if (I > 0 && I - 1 < FD->getNumParams()) {
+ PVD = FD->getParamDecl(I - 1);
+ }
+ } else {
+ if (I < FD->getNumParams()) {
+ PVD = FD->getParamDecl(I);
+ }
+ }
+ return PVD ? PVD->getAttr<LifetimeCaptureByAttr>() : nullptr;
+ };
+ if (Args.empty())
+ return;
+ for (unsigned I = 0; I < Args.size(); ++I) {
+ const LifetimeCaptureByAttr *Attr = getArgCaptureBy(I);
+ if (!Attr)
+ continue;
+ OriginList *CapturedOriginList = getOriginsList(*Args[I]);
+ if (!CapturedOriginList)
+ continue;
+ if (isGslPointerType(Args[I]->getType())) {
+ assert(!Args[I]->isGLValue() || CapturedOriginList->getLength() >= 2);
+ CapturedOriginList = getRValueOrigins(Args[I], CapturedOriginList);
+ }
+ if (!CapturedOriginList)
+ continue;
+ for (int CapturedByIdx : Attr->params()) {
+ if (CapturedByIdx == LifetimeCaptureByAttr::Global) {
+ for (OriginList *L = CapturedOriginList; L != nullptr;
+ L = L->peelOuterOrigin())
+ EscapesInCurrentBlock.push_back(FactMgr.createFact<GlobalEscapeFact>(
+ L->getOuterOriginID(), nullptr));
+ continue;
+ }
----------------
usx95 wrote:
We are missing tests for this. Let's skip doing this in this PR and move into a
separate PR.
https://github.com/llvm/llvm-project/pull/196884
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