191 lines
8.2 KiB
C++
191 lines
8.2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -Wno-sizeof-array-argument %s
|
|
//
|
|
extern "C" void *bzero(void *, unsigned);
|
|
extern "C" void *memset(void *, int, unsigned);
|
|
extern "C" void *memmove(void *s1, const void *s2, unsigned n);
|
|
extern "C" void *memcpy(void *s1, const void *s2, unsigned n);
|
|
extern "C" void *memcmp(void *s1, const void *s2, unsigned n);
|
|
|
|
struct S {int a, b, c, d;};
|
|
typedef S* PS;
|
|
|
|
struct Foo {};
|
|
typedef const Foo& CFooRef;
|
|
typedef const Foo CFoo;
|
|
typedef volatile Foo VFoo;
|
|
typedef const volatile Foo CVFoo;
|
|
|
|
typedef double Mat[4][4];
|
|
|
|
template <class Dest, class Source>
|
|
inline Dest bit_cast(const Source& source) {
|
|
Dest dest;
|
|
memcpy(&dest, &source, sizeof(dest));
|
|
return dest;
|
|
}
|
|
|
|
// http://www.lysator.liu.se/c/c-faq/c-2.html#2-6
|
|
void f(Mat m, const Foo& const_foo, char *buffer) {
|
|
S s;
|
|
S* ps = &s;
|
|
PS ps2 = &s;
|
|
char arr[5];
|
|
char* parr[5];
|
|
Foo foo;
|
|
char* heap_buffer = new char[42];
|
|
|
|
/* Should warn */
|
|
memset(&s, 0, sizeof(&s)); // \
|
|
// expected-warning {{'memset' call operates on objects of type 'S' while the size is based on a different type 'S *'}} expected-note{{did you mean to remove the addressof in the argument to 'sizeof' (and multiply it by the number of elements)?}}
|
|
memset(ps, 0, sizeof(ps)); // \
|
|
// expected-warning {{'memset' call operates on objects of type 'S' while the size is based on a different type 'S *'}} expected-note{{did you mean to dereference the argument to 'sizeof' (and multiply it by the number of elements)?}}
|
|
memset(ps2, 0, sizeof(ps2)); // \
|
|
// expected-warning {{'memset' call operates on objects of type 'S' while the size is based on a different type 'PS' (aka 'S *')}} expected-note{{did you mean to dereference the argument to 'sizeof' (and multiply it by the number of elements)?}}
|
|
memset(ps2, 0, sizeof(typeof(ps2))); // \
|
|
// expected-warning {{argument to 'sizeof' in 'memset' call is the same pointer type}}
|
|
memset(ps2, 0, sizeof(PS)); // \
|
|
// expected-warning {{argument to 'sizeof' in 'memset' call is the same pointer type}}
|
|
memset(heap_buffer, 0, sizeof(heap_buffer)); // \
|
|
// expected-warning {{'memset' call operates on objects of type 'char' while the size is based on a different type 'char *'}} expected-note{{did you mean to provide an explicit length?}}
|
|
|
|
bzero(&s, sizeof(&s)); // \
|
|
// expected-warning {{'bzero' call operates on objects of type 'S' while the size is based on a different type 'S *'}} expected-note{{did you mean to remove the addressof in the argument to 'sizeof' (and multiply it by the number of elements)?}}
|
|
bzero(ps, sizeof(ps)); // \
|
|
// expected-warning {{'bzero' call operates on objects of type 'S' while the size is based on a different type 'S *'}} expected-note{{did you mean to dereference the argument to 'sizeof' (and multiply it by the number of elements)?}}
|
|
bzero(ps2, sizeof(ps2)); // \
|
|
// expected-warning {{'bzero' call operates on objects of type 'S' while the size is based on a different type 'PS' (aka 'S *')}} expected-note{{did you mean to dereference the argument to 'sizeof' (and multiply it by the number of elements)?}}
|
|
bzero(ps2, sizeof(typeof(ps2))); // \
|
|
// expected-warning {{argument to 'sizeof' in 'bzero' call is the same pointer type}}
|
|
bzero(ps2, sizeof(PS)); // \
|
|
// expected-warning {{argument to 'sizeof' in 'bzero' call is the same pointer type}}
|
|
bzero(heap_buffer, sizeof(heap_buffer)); // \
|
|
// expected-warning {{'bzero' call operates on objects of type 'char' while the size is based on a different type 'char *'}} expected-note{{did you mean to provide an explicit length?}}
|
|
|
|
memcpy(&s, 0, sizeof(&s)); // \
|
|
// expected-warning {{'memcpy' call operates on objects of type 'S' while the size is based on a different type 'S *'}} expected-note{{did you mean to remove the addressof in the argument to 'sizeof' (and multiply it by the number of elements)?}}
|
|
memcpy(0, &s, sizeof(&s)); // \
|
|
// expected-warning {{'memcpy' call operates on objects of type 'S' while the size is based on a different type 'S *'}} expected-note{{did you mean to remove the addressof in the argument to 'sizeof' (and multiply it by the number of elements)?}}
|
|
|
|
memmove(ps, 0, sizeof(ps)); // \
|
|
// expected-warning {{'memmove' call operates on objects of type 'S' while the size is based on a different type 'S *'}} expected-note{{did you mean to dereference the argument to 'sizeof' (and multiply it by the number of elements)?}}
|
|
memcmp(ps, 0, sizeof(ps)); // \
|
|
// expected-warning {{'memcmp' call operates on objects of type 'S' while the size is based on a different type 'S *'}} expected-note{{did you mean to dereference the argument to 'sizeof' (and multiply it by the number of elements)?}}
|
|
|
|
/* Shouldn't warn */
|
|
memset((void*)&s, 0, sizeof(&s));
|
|
memset(&s, 0, sizeof(s));
|
|
memset(&s, 0, sizeof(S));
|
|
memset(&s, 0, sizeof(const S));
|
|
memset(&s, 0, sizeof(volatile S));
|
|
memset(&s, 0, sizeof(volatile const S));
|
|
memset(&foo, 0, sizeof(CFoo));
|
|
memset(&foo, 0, sizeof(VFoo));
|
|
memset(&foo, 0, sizeof(CVFoo));
|
|
memset(ps, 0, sizeof(*ps));
|
|
memset(ps2, 0, sizeof(*ps2));
|
|
memset(ps2, 0, sizeof(typeof(*ps2)));
|
|
memset(arr, 0, sizeof(arr));
|
|
memset(parr, 0, sizeof(parr));
|
|
|
|
bzero((void*)&s, sizeof(&s));
|
|
bzero(&s, sizeof(s));
|
|
bzero(&s, sizeof(S));
|
|
bzero(&s, sizeof(const S));
|
|
bzero(&s, sizeof(volatile S));
|
|
bzero(&s, sizeof(volatile const S));
|
|
bzero(&foo, sizeof(CFoo));
|
|
bzero(&foo, sizeof(VFoo));
|
|
bzero(&foo, sizeof(CVFoo));
|
|
bzero(ps, sizeof(*ps));
|
|
bzero(ps2, sizeof(*ps2));
|
|
bzero(ps2, sizeof(typeof(*ps2)));
|
|
bzero(arr, sizeof(arr));
|
|
bzero(parr, sizeof(parr));
|
|
|
|
memcpy(&foo, &const_foo, sizeof(Foo));
|
|
memcpy((void*)&s, 0, sizeof(&s));
|
|
memcpy(0, (void*)&s, sizeof(&s));
|
|
char *cptr;
|
|
memcpy(&cptr, buffer, sizeof(cptr));
|
|
memcpy((char*)&cptr, buffer, sizeof(cptr));
|
|
|
|
CFooRef cfoo = foo;
|
|
memcpy(&foo, &cfoo, sizeof(Foo));
|
|
|
|
memcpy(0, &arr, sizeof(arr));
|
|
typedef char Buff[8];
|
|
memcpy(0, &arr, sizeof(Buff));
|
|
|
|
unsigned char* puc;
|
|
bit_cast<char*>(puc);
|
|
|
|
float* pf;
|
|
bit_cast<int*>(pf);
|
|
|
|
int iarr[14];
|
|
memset(&iarr[0], 0, sizeof iarr);
|
|
memset(iarr, 0, sizeof iarr);
|
|
bzero(&iarr[0], sizeof iarr);
|
|
bzero(iarr, sizeof iarr);
|
|
|
|
int* iparr[14];
|
|
memset(&iparr[0], 0, sizeof iparr);
|
|
memset(iparr, 0, sizeof iparr);
|
|
bzero(&iparr[0], sizeof iparr);
|
|
bzero(iparr, sizeof iparr);
|
|
|
|
memset(m, 0, sizeof(Mat));
|
|
bzero(m, sizeof(Mat));
|
|
|
|
// Copy to raw buffer shouldn't warn either
|
|
memcpy(&foo, &arr, sizeof(Foo));
|
|
memcpy(&arr, &foo, sizeof(Foo));
|
|
|
|
// Shouldn't warn, and shouldn't crash either.
|
|
memset(({
|
|
if (0) {}
|
|
while (0) {}
|
|
for (;;) {}
|
|
&s;
|
|
}), 0, sizeof(s));
|
|
|
|
bzero(({
|
|
if (0) {}
|
|
while (0) {}
|
|
for (;;) {}
|
|
&s;
|
|
}), sizeof(s));
|
|
}
|
|
|
|
namespace ns {
|
|
void memset(void* s, char c, int n);
|
|
void bzero(void* s, int n);
|
|
void f(int* i) {
|
|
memset(i, 0, sizeof(i));
|
|
bzero(i, sizeof(i));
|
|
}
|
|
}
|
|
|
|
extern "C" int strncmp(const char *s1, const char *s2, unsigned n);
|
|
extern "C" int strncasecmp(const char *s1, const char *s2, unsigned n);
|
|
extern "C" char *strncpy(char *det, const char *src, unsigned n);
|
|
extern "C" char *strncat(char *dst, const char *src, unsigned n);
|
|
extern "C" char *strndup(const char *src, unsigned n);
|
|
|
|
void strcpy_and_friends() {
|
|
const char* FOO = "<- should be an array instead";
|
|
const char* BAR = "<- this, too";
|
|
|
|
strncmp(FOO, BAR, sizeof(FOO)); // \
|
|
// expected-warning {{'strncmp' call operates on objects of type 'const char' while the size is based on a different type 'const char *'}} expected-note{{did you mean to provide an explicit length?}}
|
|
strncasecmp(FOO, BAR, sizeof(FOO)); // \
|
|
// expected-warning {{'strncasecmp' call operates on objects of type 'const char' while the size is based on a different type 'const char *'}} expected-note{{did you mean to provide an explicit length?}}
|
|
|
|
char buff[80];
|
|
|
|
strncpy(buff, BAR, sizeof(BAR)); // \
|
|
// expected-warning {{'strncpy' call operates on objects of type 'const char' while the size is based on a different type 'const char *'}} expected-note{{did you mean to provide an explicit length?}}
|
|
strndup(FOO, sizeof(FOO)); // \
|
|
// expected-warning {{'strndup' call operates on objects of type 'const char' while the size is based on a different type 'const char *'}} expected-note{{did you mean to provide an explicit length?}}
|
|
}
|