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// RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-config suppress-null-return-paths=false -verify %s
// RUN: %clang_analyze_cc1 -analyzer-checker=core -verify -DSUPPRESSED=1 %s
namespace rdar12676053 {
// Delta-reduced from a preprocessed file.
template<class T>
class RefCount {
T *ref;
public:
T *operator->() const {
return ref ? ref : 0;
}
};
class string {};
class ParserInputState {
public:
string filename;
};
class Parser {
void setFilename(const string& f) {
inputState->filename = f;
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
}
protected:
RefCount<ParserInputState> inputState;
};
}
// This is the standard placement new.
inline void* operator new(__typeof__(sizeof(int)), void* __p) throw()
{
return __p;
}
extern bool coin();
class SomeClass {
public:
void doSomething();
};
namespace References {
class Map {
int *&getNewBox();
int *firstBox;
public:
int *&getValue(int key) {
if (coin()) {
return firstBox;
} else {
int *&newBox = getNewBox();
newBox = 0;
return newBox;
}
}
int *&getValueIndirectly(int key) {
int *&valueBox = getValue(key);
return valueBox;
}
};
void testMap(Map &m, int i) {
*m.getValue(i) = 1;
#ifndef SUPPRESSED
// expected-warning@-2 {{Dereference of null pointer}}
#endif
*m.getValueIndirectly(i) = 1;
#ifndef SUPPRESSED
// expected-warning@-2 {{Dereference of null pointer}}
#endif
int *&box = m.getValue(i);
extern int *getPointer();
box = getPointer();
*box = 1; // no-warning
int *&box2 = m.getValue(i);
box2 = 0;
*box2 = 1; // expected-warning {{Dereference of null pointer}}
}
SomeClass *&getSomeClass() {
if (coin()) {
extern SomeClass *&opaqueClass();
return opaqueClass();
} else {
static SomeClass *sharedClass;
sharedClass = 0;
return sharedClass;
}
}
void testClass() {
getSomeClass()->doSomething();
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
// Separate the lvalue-to-rvalue conversion from the subsequent dereference.
SomeClass *object = getSomeClass();
object->doSomething();
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
}
SomeClass *getNull() {
return 0;
}
SomeClass &returnNullReference() {
SomeClass *x = getNull();
return *x;
#ifndef SUPPRESSED
// expected-warning@-2 {{Returning null reference}}
#endif
}
}
class X{
public:
void get();
};
X *getNull() {
return 0;
}
void deref1(X *const &p) {
return p->get();
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
}
void test1() {
return deref1(getNull());
}
void deref2(X *p3) {
p3->get();
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
}
void pass2(X *const &p2) {
deref2(p2);
}
void test2() {
pass2(getNull());
}
void deref3(X *const &p2) {
X *p3 = p2;
p3->get();
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
}
void test3() {
deref3(getNull());
}
namespace Cleanups {
class NonTrivial {
public:
~NonTrivial();
SomeClass *getNull() {
return 0;
}
};
void testImmediate() {
NonTrivial().getNull()->doSomething();
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
}
void testAssignment() {
SomeClass *ptr = NonTrivial().getNull();
ptr->doSomething();
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
}
void testArgumentHelper(SomeClass *arg) {
arg->doSomething();
#ifndef SUPPRESSED
// expected-warning@-2 {{Called C++ object pointer is null}}
#endif
}
void testArgument() {
testArgumentHelper(NonTrivial().getNull());
}
}
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