forked from OSchip/llvm-project
187 lines
8.4 KiB
C++
187 lines
8.4 KiB
C++
// RUN: %check_clang_tidy %s misc-sizeof-expression %t
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class C {
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int size() { return sizeof(this); }
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// CHECK-MESSAGES: :[[@LINE-1]]:23: warning: suspicious usage of 'sizeof(this)'
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};
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#define LEN 8
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int X;
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extern int A[10];
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extern short B[10];
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#pragma pack(1)
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struct S { char a, b, c; };
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int Test1(const char* ptr) {
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int sum = 0;
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sum += sizeof(LEN);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(K)'
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sum += sizeof(LEN + 1);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(K)'
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sum += sizeof(sum, LEN);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(..., ...)'
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sum += sizeof(sizeof(X));
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
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sum += sizeof(LEN + sizeof(X));
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
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sum += sizeof(LEN + LEN + sizeof(X));
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
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sum += sizeof(LEN + (LEN + sizeof(X)));
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
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sum += sizeof(LEN + -sizeof(X));
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
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sum += sizeof(LEN + - + -sizeof(X));
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
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sum += sizeof(char) / sizeof(char);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
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sum += sizeof(A) / sizeof(S);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
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sum += sizeof(char) / sizeof(int);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
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sum += sizeof(char) / sizeof(A);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
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sum += sizeof(B[0]) / sizeof(A);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
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sum += sizeof(ptr) / sizeof(char);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
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sum += sizeof(ptr) / sizeof(ptr[0]);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
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sum += sizeof(ptr) / sizeof(char*);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
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sum += sizeof(ptr) / sizeof(void*);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
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sum += sizeof(ptr) / sizeof(const void volatile*);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
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sum += sizeof(ptr) / sizeof(char);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
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sum += sizeof(ptr) / sizeof(ptr[0]);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
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sum += sizeof(int) * sizeof(char);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
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sum += sizeof(ptr) * sizeof(ptr[0]);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
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sum += sizeof(int) * (2 * sizeof(char));
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
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sum += (2 * sizeof(char)) * sizeof(int);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
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if (sizeof(A) < 0x100000) sum += 42;
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: suspicious comparison of 'sizeof(expr)' to a constant
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if (sizeof(A) <= 0xFFFFFFFEU) sum += 42;
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: suspicious comparison of 'sizeof(expr)' to a constant
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return sum;
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}
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typedef char MyChar;
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typedef const MyChar MyConstChar;
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int CE0 = sizeof sizeof(char);
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// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
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int CE1 = sizeof +sizeof(char);
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// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
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int CE2 = sizeof sizeof(const char*);
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// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
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int CE3 = sizeof sizeof(const volatile char* const*);
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// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
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int CE4 = sizeof sizeof(MyConstChar);
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// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
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int Test2(MyConstChar* A) {
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int sum = 0;
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sum += sizeof(MyConstChar) / sizeof(char);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
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sum += sizeof(MyConstChar) / sizeof(MyChar);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
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sum += sizeof(A[0]) / sizeof(char);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
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return sum;
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}
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template <int T>
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int Foo() { int A[T]; return sizeof(T); }
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// CHECK-MESSAGES: :[[@LINE-1]]:30: warning: suspicious usage of 'sizeof(K)'
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template <typename T>
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int Bar() { T A[5]; return sizeof(A[0]) / sizeof(T); }
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// CHECK-MESSAGES: :[[@LINE-1]]:28: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
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int Test3() { return Foo<42>() + Bar<char>(); }
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static const char* kABC = "abc";
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static const wchar_t* kDEF = L"def";
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int Test4(const char A[10]) {
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int sum = 0;
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sum += sizeof(kABC);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(char*)'
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sum += sizeof(kDEF);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(char*)'
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return sum;
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}
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int Test5() {
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typedef int Array10[10];
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struct MyStruct {
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Array10 arr;
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Array10* ptr;
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};
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typedef const MyStruct TMyStruct;
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static TMyStruct kGlocalMyStruct = {};
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static TMyStruct volatile * kGlocalMyStructPtr = &kGlocalMyStruct;
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MyStruct S;
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Array10 A10;
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int sum = 0;
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sum += sizeof(&S.arr);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof(&kGlocalMyStruct.arr);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof(&kGlocalMyStructPtr->arr);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof(S.arr + 0);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof(+ S.arr);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof((int*)S.arr);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof(S.ptr);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof(kGlocalMyStruct.ptr);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof(kGlocalMyStructPtr->ptr);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof(&kGlocalMyStruct);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof(&S);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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sum += sizeof(&A10);
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
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return sum;
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}
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int ValidExpressions() {
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int A[] = {1, 2, 3, 4};
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static const char str[] = "hello";
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static const char* ptr[] { "aaa", "bbb", "ccc" };
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int sum = 0;
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if (sizeof(A) < 10)
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sum += sizeof(A);
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sum += sizeof(int);
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sum += sizeof(A[sizeof(A) / sizeof(int)]);
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sum += sizeof(&A[sizeof(A) / sizeof(int)]);
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sum += sizeof(sizeof(0)); // Special case: sizeof size_t.
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sum += sizeof(void*);
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sum += sizeof(void const *);
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sum += sizeof(void const *) / 4;
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sum += sizeof(str);
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sum += sizeof(str) / sizeof(char);
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sum += sizeof(str) / sizeof(str[0]);
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sum += sizeof(ptr) / sizeof(ptr[0]);
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sum += sizeof(ptr) / sizeof(*(ptr));
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return sum;
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}
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