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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#include "NoAddRefReleaseOnReturnChecker.h"
#include "CustomMatchers.h"
void NoAddRefReleaseOnReturnChecker::registerMatchers(MatchFinder *AstMatcher) {
// Look for all of the calls to AddRef() or Release()
memberExpr(isAddRefOrRelease(), hasParent(callExpr())).bind("member"),
void NoAddRefReleaseOnReturnChecker::check(
const MatchFinder::MatchResult &Result) {
const MemberExpr *Member = Result.Nodes.getNodeAs<MemberExpr>("member");
const Expr *Base = IgnoreTrivials(Member->getBase());
// Check if the call to AddRef() or Release() was made on the result of a call
// to a MOZ_NO_ADDREF_RELEASE_ON_RETURN function or method.
if (auto *Call = dyn_cast<CallExpr>(Base)) {
if (auto *Callee = Call->getDirectCallee()) {
if (hasCustomAttribute<moz_no_addref_release_on_return>(Callee)) {
"%1 cannot be called on the return value of %0",
<< Callee << dyn_cast<CXXMethodDecl>(Member->getMemberDecl());