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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "CheckerRegistration.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h"
#include "clang/StaticAnalyzer/Frontend/AnalysisConsumer.h"
#include "clang/StaticAnalyzer/Frontend/CheckerRegistry.h"
#include "gtest/gtest.h"
using namespace clang;
using namespace ento;
// Some dummy trait that we can mutate back and forth to force a new State.
REGISTER_TRAIT_WITH_PROGRAMSTATE(Flag, bool)
namespace {
class FlipFlagOnCheckLocation : public Checker<check::Location> {
public:
// We make sure we alter the State every time we model a checkLocation event.
void checkLocation(SVal l, bool isLoad, const Stmt *S,
CheckerContext &C) const {
ProgramStateRef State = C.getState();
State = State->set<Flag>(!State->get<Flag>());
C.addTransition(State);
}
};
void addFlagFlipperChecker(AnalysisASTConsumer &AnalysisConsumer,
AnalyzerOptions &AnOpts) {
AnOpts.CheckersAndPackages = {{"test.FlipFlagOnCheckLocation", true}};
AnalysisConsumer.AddCheckerRegistrationFn([](CheckerRegistry &Registry) {
Registry.addChecker<FlipFlagOnCheckLocation>("test.FlipFlagOnCheckLocation",
"MockDescription");
});
}
TEST(ObjCTest, CheckLocationEventsShouldMaterializeInObjCForCollectionStmts) {
// Previously, the `ExprEngine::hasMoreIteration` may fired an assertion
// because we forgot to handle correctly the resulting nodes of the
// check::Location callback for the ObjCForCollectionStmts.
// This caused inconsistencies in the graph and triggering the assertion.
// See #124477 for more details.
std::string Diags;
EXPECT_TRUE(runCheckerOnCodeWithArgs<addFlagFlipperChecker>(
R"(
@class NSArray, NSDictionary, NSString;
extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2)));
void entrypoint(NSArray *bowl) {
for (NSString *fruit in bowl) { // no-crash
NSLog(@"Fruit: %@", fruit);
}
})",
{"-x", "objective-c"}, Diags));
}
} // namespace
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