llvm-project/clang/test/Analysis/smart-ptr-text-output.cpp

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// RUN: %clang_analyze_cc1\
// RUN: -analyzer-checker=core,cplusplus.Move,alpha.cplusplus.SmartPtr\
// RUN: -analyzer-config cplusplus.SmartPtrModeling:ModelSmartPtrDereference=true\
// RUN: -analyzer-output=text -std=c++11 %s -verify=expected
#include "Inputs/system-header-simulator-cxx.h"
class A {
public:
A(){};
void foo();
};
A *return_null() {
return nullptr;
}
void derefAfterDefaultCtr() {
std::unique_ptr<A> P; // expected-note {{Default constructed smart pointer 'P' is null}}
P->foo(); // expected-warning {{Dereference of null smart pointer 'P' [alpha.cplusplus.SmartPtr]}}
// expected-note@-1{{Dereference of null smart pointer 'P'}}
}
void derefAfterCtrWithNull() {
A *NullInnerPtr = nullptr; // expected-note {{'NullInnerPtr' initialized to a null pointer value}}
std::unique_ptr<A> P(NullInnerPtr); // expected-note {{Smart pointer 'P' is constructed using a null value}}
*P; // expected-warning {{Dereference of null smart pointer 'P' [alpha.cplusplus.SmartPtr]}}
// expected-note@-1{{Dereference of null smart pointer 'P'}}
}
void derefAfterCtrWithNullVariable() {
A *NullInnerPtr = nullptr; // expected-note {{'NullInnerPtr' initialized to a null pointer value}}
std::unique_ptr<A> P(NullInnerPtr); // expected-note {{Smart pointer 'P' is constructed using a null value}}
P->foo(); // expected-warning {{Dereference of null smart pointer 'P' [alpha.cplusplus.SmartPtr]}}
// expected-note@-1{{Dereference of null smart pointer 'P'}}
}
void derefAfterRelease() {
std::unique_ptr<A> P(new A()); // expected-note {{Smart pointer 'P' is constructed}}
// FIXME: should mark region as uninteresting after release, so above note will not be there
P.release(); // expected-note {{Smart pointer 'P' is released and set to null}}
P->foo(); // expected-warning {{Dereference of null smart pointer 'P' [alpha.cplusplus.SmartPtr]}}
// expected-note@-1{{Dereference of null smart pointer 'P'}}
}
void derefAfterReset() {
std::unique_ptr<A> P(new A()); // expected-note {{Smart pointer 'P' is constructed}}
P.reset(); // expected-note {{Smart pointer 'P' reset using a null value}}
P->foo(); // expected-warning {{Dereference of null smart pointer 'P' [alpha.cplusplus.SmartPtr]}}
// expected-note@-1{{Dereference of null smart pointer 'P'}}
}
void derefAfterResetWithNull() {
A *NullInnerPtr = nullptr; // expected-note {{'NullInnerPtr' initialized to a null pointer value}}
std::unique_ptr<A> P(new A()); // expected-note {{Smart pointer 'P' is constructed}}
P.reset(NullInnerPtr); // expected-note {{Smart pointer 'P' reset using a null value}}
P->foo(); // expected-warning {{Dereference of null smart pointer 'P' [alpha.cplusplus.SmartPtr]}}
// expected-note@-1{{Dereference of null smart pointer 'P'}}
}
// FIXME: Fix this test when support is added for tracking raw pointer
// and mark the smart pointer as interesting based on that and add tags.
void derefOnReleasedNullRawPtr() {
std::unique_ptr<A> P; // FIXME: add note "Default constructed smart pointer 'P' is null"
A *AP = P.release(); // expected-note {{'AP' initialized to a null pointer value}}
AP->foo(); // expected-warning {{Called C++ object pointer is null [core.CallAndMessage]}}
// expected-note@-1{{Called C++ object pointer is null}}
}
void derefOnSwappedNullPtr() {
std::unique_ptr<A> P(new A()); // expected-note {{Smart pointer 'P' is constructed}}
std::unique_ptr<A> PNull; // expected-note {{Default constructed smart pointer 'PNull' is null}}
P.swap(PNull); // expected-note {{Swapped null smart pointer 'PNull' with smart pointer 'P'}}
PNull->foo(); // No warning.
(*P).foo(); // expected-warning {{Dereference of null smart pointer 'P' [alpha.cplusplus.SmartPtr]}}
// expected-note@-1{{Dereference of null smart pointer 'P'}}
}
// FIXME: Fix this test when "std::swap" is modeled seperately.
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}}
std::swap(P, PNull); // expected-note@Inputs/system-header-simulator-cxx.h:978 {{Swapped null smart pointer 'PNull' with smart pointer 'P'}}
// expected-note@-1 {{Calling 'swap<A>'}}
// expected-note@-2 {{Returning from 'swap<A>'}}
P->foo(); // expected-warning {{Dereference of null smart pointer 'P' [alpha.cplusplus.SmartPtr]}}
// expected-note@-1{{Dereference of null smart pointer 'P'}}
}
struct StructWithSmartPtr { // expected-note {{Default constructed smart pointer 'S.P' is null}}
std::unique_ptr<A> P;
};
void derefAfterDefaultCtrInsideStruct() {
StructWithSmartPtr S; // expected-note {{Calling implicit default constructor for 'StructWithSmartPtr'}}
// expected-note@-1 {{Returning from default constructor for 'StructWithSmartPtr'}}
S.P->foo(); // expected-warning {{Dereference of null smart pointer 'S.P' [alpha.cplusplus.SmartPtr]}}
// expected-note@-1{{Dereference of null smart pointer 'S.P'}}
}
void noNoteTagsForNonInterestingRegion() {
std::unique_ptr<A> P; // expected-note {{Default constructed smart pointer 'P' is null}}
std::unique_ptr<A> P1; // No note.
std::unique_ptr<A> P2; // No note.
P1.release(); // No note.
P1.reset(); // No note.
P1.swap(P2); // No note.
P->foo(); // expected-warning {{Dereference of null smart pointer 'P' [alpha.cplusplus.SmartPtr]}}
// expected-note@-1{{Dereference of null smart pointer 'P'}}
}
void noNoteTagsForNonMatchingBugType() {
std::unique_ptr<A> P; // No note.
std::unique_ptr<A> P1; // No note.
P1 = std::move(P); // expected-note {{Smart pointer 'P' of type 'std::unique_ptr' is reset to null when moved from}}
P->foo(); // expected-warning {{Dereference of null smart pointer 'P' of type 'std::unique_ptr' [cplusplus.Move]}}
// expected-note@-1 {{Dereference of null smart pointer 'P' of type 'std::unique_ptr'}}
}
void derefOnRawPtrFromGetOnNullPtr() {
std::unique_ptr<A> P; // FIXME: add note "Default constructed smart pointer 'P' is null"
P.get()->foo(); // expected-warning {{Called C++ object pointer is null [core.CallAndMessage]}}
// expected-note@-1 {{Called C++ object pointer is null}}
}
void derefOnRawPtrFromGetOnValidPtr() {
std::unique_ptr<A> P(new A());
P.get()->foo(); // No warning.
}
void derefOnRawPtrFromGetOnUnknownPtr(std::unique_ptr<A> P) {
P.get()->foo(); // No warning.
}