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// RUN: %check_clang_tidy %s cert-oop57-cpp %t -- \
// RUN: -config='{CheckOptions: \
// RUN: [{key: cert-oop57-cpp.MemSetNames, value: mymemset}, \
// RUN: {key: cert-oop57-cpp.MemCpyNames, value: mymemcpy}, \
// RUN: {key: cert-oop57-cpp.MemCmpNames, value: mymemcmp}]}' \
// RUN: --
void mymemset(void *, unsigned char, decltype(sizeof(int)));
void mymemcpy(void *, const void *, decltype(sizeof(int)));
int mymemcmp(const void *, const void *, decltype(sizeof(int)));
namespace std {
void memset(void *, unsigned char, decltype(sizeof(int)));
void memcpy(void *, const void *, decltype(sizeof(int)));
void memmove(void *, const void *, decltype(sizeof(int)));
void strcpy(void *, const void *, decltype(sizeof(int)));
int memcmp(const void *, const void *, decltype(sizeof(int)));
int strcmp(const void *, const void *, decltype(sizeof(int)));
} // namespace std
struct Trivial {
int I;
int J;
};
struct NonTrivial {
int I;
int J;
NonTrivial() : I(0), J(0) {}
NonTrivial &operator=(const NonTrivial &Other) {
I = Other.I;
J = Other.J;
return *this;
}
bool operator==(const Trivial &Other) const {
return I == Other.I && J == Other.J;
}
bool operator!=(const Trivial &Other) const {
return !(*this == Other);
}
};
void foo(const Trivial &Other) {
Trivial Data;
std::memset(&Data, 0, sizeof(Data));
// CHECK-MESSAGES-NOT: :[[@LINE-1]]:3: warning: calling 'memset' on a non-trivially default constructible class is undefined
std::memset(&Data, 0, sizeof(Trivial));
// CHECK-MESSAGES-NOT: :[[@LINE-1]]:3: warning: calling 'memset' on a non-trivially default constructible class is undefined
std::memcpy(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES-NOT: :[[@LINE-1]]:3: warning: calling 'memcpy' on a non-trivially copyable class is undefined
std::memmove(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES-NOT: :[[@LINE-1]]:3: warning: calling 'memmove' on a non-trivially copyable class is undefined
std::strcpy(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES-NOT: :[[@LINE-1]]:3: warning: calling 'strcpy' on a non-trivially copyable class is undefined
std::memcmp(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES-NOT: :[[@LINE-1]]:3: warning: consider using comparison operators instead of calling 'memcmp'
std::strcmp(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES-NOT: :[[@LINE-1]]:3: warning: consider using comparison operators instead of calling 'strcmp'
}
void bar(const NonTrivial &Other) {
NonTrivial Data;
std::memset(&Data, 0, sizeof(Data));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: calling 'memset' on a non-trivially default constructible class is undefined
// Check it detects sizeof(Type) as well as sizeof(Instantiation)
std::memset(&Data, 0, sizeof(NonTrivial));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: calling 'memset' on a non-trivially default constructible class is undefined
std::memcpy(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: calling 'memcpy' on a non-trivially copyable class is undefined
std::memmove(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: calling 'memmove' on a non-trivially copyable class is undefined
std::strcpy(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: calling 'strcpy' on a non-trivially copyable class is undefined
std::memcmp(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: consider using comparison operators instead of calling 'memcmp'
std::strcmp(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: consider using comparison operators instead of calling 'strcmp'
}
void baz(const NonTrivial &Other) {
NonTrivial Data;
mymemset(&Data, 0, sizeof(Data));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: calling 'mymemset' on a non-trivially default constructible class is undefined
mymemcpy(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: calling 'mymemcpy' on a non-trivially copyable class is undefined
mymemcmp(&Data, &Other, sizeof(Data));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: consider using comparison operators instead of calling 'mymemcmp'
}
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