forked from OSchip/llvm-project
257 lines
11 KiB
C++
257 lines
11 KiB
C++
// RUN: %check_clang_tidy %s bugprone-sizeof-expression %t -- -config="{CheckOptions: [{key: bugprone-sizeof-expression.WarnOnSizeOfIntegerExpression, value: 1}]}" --
|
|
|
|
class C {
|
|
int size() { return sizeof(this); }
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:23: warning: suspicious usage of 'sizeof(this)'
|
|
};
|
|
|
|
#define LEN 8
|
|
|
|
int X;
|
|
extern int A[10];
|
|
extern short B[10];
|
|
|
|
#pragma pack(1)
|
|
struct S { char a, b, c; };
|
|
|
|
enum E { E_VALUE = 0 };
|
|
enum class EC { VALUE = 0 };
|
|
|
|
bool AsBool() { return false; }
|
|
int AsInt() { return 0; }
|
|
E AsEnum() { return E_VALUE; }
|
|
EC AsEnumClass() { return EC::VALUE; }
|
|
S AsStruct() { return {}; }
|
|
|
|
struct M {
|
|
int AsInt() { return 0; }
|
|
E AsEnum() { return E_VALUE; }
|
|
S AsStruct() { return {}; }
|
|
};
|
|
|
|
int ReturnOverload(int) { return {}; }
|
|
S ReturnOverload(S) { return {}; }
|
|
|
|
template <class T>
|
|
T ReturnTemplate(T) { return {}; }
|
|
|
|
template <class T>
|
|
bool TestTrait1() {
|
|
return sizeof(ReturnOverload(T{})) == sizeof(A);
|
|
}
|
|
|
|
template <class T>
|
|
bool TestTrait2() {
|
|
return sizeof(ReturnTemplate(T{})) == sizeof(A);
|
|
}
|
|
|
|
template <class T>
|
|
bool TestTrait3() {
|
|
return sizeof(ReturnOverload(0)) == sizeof(T{});
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
|
|
}
|
|
|
|
template <class T>
|
|
bool TestTrait4() {
|
|
return sizeof(ReturnTemplate(0)) == sizeof(T{});
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
|
|
}
|
|
|
|
bool TestTemplates() {
|
|
bool b = true;
|
|
b &= TestTrait1<int>();
|
|
b &= TestTrait1<S>();
|
|
b &= TestTrait2<int>();
|
|
b &= TestTrait2<S>();
|
|
b &= TestTrait3<int>();
|
|
b &= TestTrait3<S>();
|
|
b &= TestTrait4<int>();
|
|
b &= TestTrait4<S>();
|
|
return b;
|
|
}
|
|
|
|
int Test1(const char* ptr) {
|
|
int sum = 0;
|
|
sum += sizeof(LEN);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(K)'
|
|
sum += sizeof(LEN + 1);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(K)'
|
|
sum += sizeof(sum, LEN);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(..., ...)'
|
|
sum += sizeof(AsBool());
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
|
|
sum += sizeof(AsInt());
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
|
|
sum += sizeof(AsEnum());
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
|
|
sum += sizeof(AsEnumClass());
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
|
|
sum += sizeof(M{}.AsInt());
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
|
|
sum += sizeof(M{}.AsEnum());
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
|
|
sum += sizeof(sizeof(X));
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
sum += sizeof(LEN + sizeof(X));
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
sum += sizeof(LEN + LEN + sizeof(X));
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
sum += sizeof(LEN + (LEN + sizeof(X)));
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
sum += sizeof(LEN + -sizeof(X));
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
sum += sizeof(LEN + - + -sizeof(X));
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
sum += sizeof(char) / sizeof(char);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
|
|
sum += sizeof(A) / sizeof(S);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
|
|
sum += sizeof(char) / sizeof(int);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
|
|
sum += sizeof(char) / sizeof(A);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
|
|
sum += sizeof(B[0]) / sizeof(A);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
|
|
sum += sizeof(ptr) / sizeof(char);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
|
|
sum += sizeof(ptr) / sizeof(ptr[0]);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
|
|
sum += sizeof(ptr) / sizeof(char*);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
|
|
sum += sizeof(ptr) / sizeof(void*);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
|
|
sum += sizeof(ptr) / sizeof(const void volatile*);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
|
|
sum += sizeof(ptr) / sizeof(char);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
|
|
sum += sizeof(ptr) / sizeof(ptr[0]);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
|
|
sum += sizeof(int) * sizeof(char);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
|
|
sum += sizeof(ptr) * sizeof(ptr[0]);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
|
|
sum += sizeof(int) * (2 * sizeof(char));
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
|
|
sum += (2 * sizeof(char)) * sizeof(int);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
|
|
if (sizeof(A) < 0x100000) sum += 42;
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: suspicious comparison of 'sizeof(expr)' to a constant
|
|
if (sizeof(A) <= 0xFFFFFFFEU) sum += 42;
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: suspicious comparison of 'sizeof(expr)' to a constant
|
|
return sum;
|
|
}
|
|
|
|
typedef char MyChar;
|
|
typedef const MyChar MyConstChar;
|
|
|
|
int CE0 = sizeof sizeof(char);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
int CE1 = sizeof +sizeof(char);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
int CE2 = sizeof sizeof(const char*);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
int CE3 = sizeof sizeof(const volatile char* const*);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
int CE4 = sizeof sizeof(MyConstChar);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
|
|
|
|
int Test2(MyConstChar* A) {
|
|
int sum = 0;
|
|
sum += sizeof(MyConstChar) / sizeof(char);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
|
|
sum += sizeof(MyConstChar) / sizeof(MyChar);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
|
|
sum += sizeof(A[0]) / sizeof(char);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
|
|
return sum;
|
|
}
|
|
|
|
template <int T>
|
|
int Foo() { int A[T]; return sizeof(T); }
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:30: warning: suspicious usage of 'sizeof(K)'
|
|
template <typename T>
|
|
int Bar() { T A[5]; return sizeof(A[0]) / sizeof(T); }
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:28: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
|
|
int Test3() { return Foo<42>() + Bar<char>(); }
|
|
|
|
static const char* kABC = "abc";
|
|
static const wchar_t* kDEF = L"def";
|
|
int Test4(const char A[10]) {
|
|
int sum = 0;
|
|
sum += sizeof(kABC);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(char*)'
|
|
sum += sizeof(kDEF);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(char*)'
|
|
return sum;
|
|
}
|
|
|
|
int Test5() {
|
|
typedef int Array10[10];
|
|
|
|
struct MyStruct {
|
|
Array10 arr;
|
|
Array10* ptr;
|
|
};
|
|
typedef const MyStruct TMyStruct;
|
|
|
|
static TMyStruct kGlocalMyStruct = {};
|
|
static TMyStruct volatile * kGlocalMyStructPtr = &kGlocalMyStruct;
|
|
|
|
MyStruct S;
|
|
Array10 A10;
|
|
|
|
int sum = 0;
|
|
sum += sizeof(&S.arr);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
sum += sizeof(&kGlocalMyStruct.arr);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
sum += sizeof(&kGlocalMyStructPtr->arr);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
sum += sizeof(S.arr + 0);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
sum += sizeof(+ S.arr);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
sum += sizeof((int*)S.arr);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
|
|
sum += sizeof(S.ptr);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
sum += sizeof(kGlocalMyStruct.ptr);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
sum += sizeof(kGlocalMyStructPtr->ptr);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
|
|
sum += sizeof(&kGlocalMyStruct);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
sum += sizeof(&S);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
sum += sizeof(&A10);
|
|
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
|
|
|
|
return sum;
|
|
}
|
|
|
|
int ValidExpressions() {
|
|
int A[] = {1, 2, 3, 4};
|
|
static const char str[] = "hello";
|
|
static const char* ptr[] { "aaa", "bbb", "ccc" };
|
|
int sum = 0;
|
|
if (sizeof(A) < 10)
|
|
sum += sizeof(A);
|
|
sum += sizeof(int);
|
|
sum += sizeof(AsStruct());
|
|
sum += sizeof(M{}.AsStruct());
|
|
sum += sizeof(A[sizeof(A) / sizeof(int)]);
|
|
sum += sizeof(&A[sizeof(A) / sizeof(int)]);
|
|
sum += sizeof(sizeof(0)); // Special case: sizeof size_t.
|
|
sum += sizeof(void*);
|
|
sum += sizeof(void const *);
|
|
sum += sizeof(void const *) / 4;
|
|
sum += sizeof(str);
|
|
sum += sizeof(str) / sizeof(char);
|
|
sum += sizeof(str) / sizeof(str[0]);
|
|
sum += sizeof(ptr) / sizeof(ptr[0]);
|
|
sum += sizeof(ptr) / sizeof(*(ptr));
|
|
return sum;
|
|
}
|