| 1 | // RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic -Wstrlcpy-strlcat-size -Wno-string-plus-int -triple=i686-apple-darwin9 |
| 2 | // This test needs to set the target because it uses __builtin_ia32_vec_ext_v4si |
| 3 | |
| 4 | int test1(float a, int b) { |
| 5 | return __builtin_isless(a, b); // expected-note {{declared here}} |
| 6 | } |
| 7 | int test2(int a, int b) { |
| 8 | return __builtin_islessequal(a, b); // expected-error {{floating point type}} |
| 9 | } |
| 10 | |
| 11 | int test3(double a, float b) { |
| 12 | return __builtin_isless(a, b); |
| 13 | } |
| 14 | int test4(int* a, double b) { |
| 15 | return __builtin_islessequal(a, b); // expected-error {{floating point type}} |
| 16 | } |
| 17 | |
| 18 | int test5(float a, long double b) { |
| 19 | return __builtin_isless(a, b, b); // expected-error {{too many arguments}} |
| 20 | } |
| 21 | int test6(float a, long double b) { |
| 22 | return __builtin_islessequal(a); // expected-error {{too few arguments}} |
| 23 | } |
| 24 | |
| 25 | |
| 26 | #define CFSTR __builtin___CFStringMakeConstantString |
| 27 | void test7() { |
| 28 | const void *X; |
| 29 | X = CFSTR("\242"); // expected-warning {{input conversion stopped}} |
| 30 | X = CFSTR("\0"); // no-warning |
| 31 | X = CFSTR(242); // expected-error {{CFString literal is not a string constant}} expected-warning {{incompatible integer to pointer conversion}} |
| 32 | X = CFSTR("foo", "bar"); // expected-error {{too many arguments to function call}} |
| 33 | } |
| 34 | |
| 35 | |
| 36 | // atomics. |
| 37 | |
| 38 | void test9(short v) { |
| 39 | unsigned i, old; |
| 40 | |
| 41 | old = __sync_fetch_and_add(); // expected-error {{too few arguments to function call}} |
| 42 | old = __sync_fetch_and_add(&old); // expected-error {{too few arguments to function call}} |
| 43 | old = __sync_fetch_and_add((unsigned*)0, 42i); // expected-warning {{imaginary constants are a GNU extension}} |
| 44 | |
| 45 | // PR7600: Pointers are implicitly casted to integers and back. |
| 46 | void *old_ptr = __sync_val_compare_and_swap((void**)0, 0, 0); |
| 47 | |
| 48 | // Ensure the return type is correct even when implicit casts are stripped |
| 49 | // away. This triggers an assertion while checking the comparison otherwise. |
| 50 | if (__sync_fetch_and_add(&old, 1) == 1) { |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | // overloaded atomics should be declared only once. |
| 55 | void test9_1(volatile int* ptr, int val) { |
| 56 | __sync_fetch_and_add_4(ptr, val); |
| 57 | } |
| 58 | void test9_2(volatile int* ptr, int val) { |
| 59 | __sync_fetch_and_add(ptr, val); |
| 60 | } |
| 61 | void test9_3(volatile int* ptr, int val) { |
| 62 | __sync_fetch_and_add_4(ptr, val); |
| 63 | __sync_fetch_and_add(ptr, val); |
| 64 | __sync_fetch_and_add(ptr, val); |
| 65 | __sync_fetch_and_add_4(ptr, val); |
| 66 | __sync_fetch_and_add_4(ptr, val); |
| 67 | } |
| 68 | |
| 69 | void test9_4(volatile int* ptr, int val) { |
| 70 | // expected-warning@+1 {{the semantics of this intrinsic changed with GCC version 4.4 - the newer semantics are provided here}} |
| 71 | __sync_fetch_and_nand(ptr, val); |
| 72 | } |
| 73 | |
| 74 | // rdar://7236819 |
| 75 | void test10(void) __attribute__((noreturn)); |
| 76 | |
| 77 | void test10(void) { |
| 78 | __asm__("int3"); |
| 79 | __builtin_unreachable(); |
| 80 | |
| 81 | // No warning about falling off the end of a noreturn function. |
| 82 | } |
| 83 | |
| 84 | void test11(int X) { |
| 85 | switch (X) { |
| 86 | case __builtin_eh_return_data_regno(0): // constant foldable. |
| 87 | break; |
| 88 | } |
| 89 | |
| 90 | __builtin_eh_return_data_regno(X); // expected-error {{argument to '__builtin_eh_return_data_regno' must be a constant integer}} |
| 91 | } |
| 92 | |
| 93 | // PR5062 |
| 94 | void test12(void) __attribute__((__noreturn__)); |
| 95 | void test12(void) { |
| 96 | __builtin_trap(); // no warning because trap is noreturn. |
| 97 | } |
| 98 | |
| 99 | void test_unknown_builtin(int a, int b) { |
| 100 | __builtin_isles(a, b); // expected-error{{use of unknown builtin}} \ |
| 101 | // expected-note{{did you mean '__builtin_isless'?}} |
| 102 | } |
| 103 | |
| 104 | int test13() { |
| 105 | __builtin_eh_return(0, 0); // no warning, eh_return never returns. |
| 106 | } |
| 107 | |
| 108 | // <rdar://problem/8228293> |
| 109 | void test14() { |
| 110 | int old; |
| 111 | old = __sync_fetch_and_min((volatile int *)&old, 1); |
| 112 | } |
| 113 | |
| 114 | // <rdar://problem/8336581> |
| 115 | void test15(const char *s) { |
| 116 | __builtin_printf("string is %s\n", s); |
| 117 | } |
| 118 | |
| 119 | // PR7885 |
| 120 | int test16() { |
| 121 | return __builtin_constant_p() + // expected-error{{too few arguments}} |
| 122 | __builtin_constant_p(1, 2); // expected-error {{too many arguments}} |
| 123 | } |
| 124 | |
| 125 | // __builtin_constant_p cannot resolve non-constants as a file scoped array. |
| 126 | int expr; |
| 127 | char y[__builtin_constant_p(expr) ? -1 : 1]; // no warning, the builtin is false. |
| 128 | |
| 129 | // no warning, the builtin is false. |
| 130 | struct foo { int a; }; |
| 131 | struct foo x = (struct foo) { __builtin_constant_p(42) ? 37 : 927 }; |
| 132 | |
| 133 | const int test17_n = 0; |
| 134 | const char test17_c[] = {1, 2, 3, 0}; |
| 135 | const char test17_d[] = {1, 2, 3, 4}; |
| 136 | typedef int __attribute__((vector_size(16))) IntVector; |
| 137 | struct Aggregate { int n; char c; }; |
| 138 | enum Enum { EnumValue1, EnumValue2 }; |
| 139 | |
| 140 | typedef __typeof(sizeof(int)) size_t; |
| 141 | size_t strlen(const char *); |
| 142 | |
| 143 | void test17() { |
| 144 | #define ASSERT(...) { int arr[(__VA_ARGS__) ? 1 : -1]; } |
| 145 | #define T(...) ASSERT(__builtin_constant_p(__VA_ARGS__)) |
| 146 | #define F(...) ASSERT(!__builtin_constant_p(__VA_ARGS__)) |
| 147 | |
| 148 | // __builtin_constant_p returns 1 if the argument folds to: |
| 149 | // - an arithmetic constant with value which is known at compile time |
| 150 | T(test17_n); |
| 151 | T(&test17_c[3] - test17_c); |
| 152 | T(3i + 5); // expected-warning {{imaginary constant}} |
| 153 | T(4.2 * 7.6); |
| 154 | T(EnumValue1); |
| 155 | T((enum Enum)(int)EnumValue2); |
| 156 | |
| 157 | // - the address of the first character of a string literal, losslessly cast |
| 158 | // to any type |
| 159 | T("string literal"); |
| 160 | T((double*)"string literal"); |
| 161 | T("string literal" + 0); |
| 162 | T((long)"string literal"); |
| 163 | |
| 164 | // ... and otherwise returns 0. |
| 165 | F("string literal" + 1); |
| 166 | F(&test17_n); |
| 167 | F(test17_c); |
| 168 | F(&test17_c); |
| 169 | F(&test17_d); |
| 170 | F((struct Aggregate){0, 1}); |
| 171 | F((IntVector){0, 1, 2, 3}); |
| 172 | F(test17); |
| 173 | |
| 174 | // Ensure that a technique used in glibc is handled correctly. |
| 175 | #define OPT(...) (__builtin_constant_p(__VA_ARGS__) && strlen(__VA_ARGS__) < 4) |
| 176 | // FIXME: These are incorrectly treated as ICEs because strlen is treated as |
| 177 | // a builtin. |
| 178 | ASSERT(OPT("abc")); |
| 179 | ASSERT(!OPT("abcd")); |
| 180 | // In these cases, the strlen is non-constant, but the __builtin_constant_p |
| 181 | // is 0: the array size is not an ICE but is foldable. |
| 182 | ASSERT(!OPT(test17_c)); // expected-warning {{folded}} |
| 183 | ASSERT(!OPT(&test17_c[0])); // expected-warning {{folded}} |
| 184 | ASSERT(!OPT((char*)test17_c)); // expected-warning {{folded}} |
| 185 | ASSERT(!OPT(test17_d)); // expected-warning {{folded}} |
| 186 | ASSERT(!OPT(&test17_d[0])); // expected-warning {{folded}} |
| 187 | ASSERT(!OPT((char*)test17_d)); // expected-warning {{folded}} |
| 188 | |
| 189 | #undef OPT |
| 190 | #undef T |
| 191 | #undef F |
| 192 | } |
| 193 | |
| 194 | void test18() { |
| 195 | char src[1024]; |
| 196 | char dst[2048]; |
| 197 | size_t result; |
| 198 | void *ptr; |
| 199 | |
| 200 | ptr = __builtin___memccpy_chk(dst, src, '\037', sizeof(src), sizeof(dst)); |
| 201 | result = __builtin___strlcpy_chk(dst, src, sizeof(dst), sizeof(dst)); |
| 202 | result = __builtin___strlcat_chk(dst, src, sizeof(dst), sizeof(dst)); |
| 203 | |
| 204 | ptr = __builtin___memccpy_chk(dst, src, '\037', sizeof(src)); // expected-error {{too few arguments to function call}} |
| 205 | ptr = __builtin___strlcpy_chk(dst, src, sizeof(dst), sizeof(dst)); // expected-warning {{incompatible integer to pointer conversion}} |
| 206 | ptr = __builtin___strlcat_chk(dst, src, sizeof(dst), sizeof(dst)); // expected-warning {{incompatible integer to pointer conversion}} |
| 207 | } |
| 208 | |
| 209 | void no_ms_builtins() { |
| 210 | __assume(1); // expected-warning {{implicit declaration}} |
| 211 | __noop(1); // expected-warning {{implicit declaration}} |
| 212 | __debugbreak(); // expected-warning {{implicit declaration}} |
| 213 | } |
| 214 | |
| 215 | void unavailable() { |
| 216 | __builtin_operator_new(0); // expected-error {{'__builtin_operator_new' is only available in C++}} |
| 217 | __builtin_operator_delete(0); // expected-error {{'__builtin_operator_delete' is only available in C++}} |
| 218 | } |
| 219 | |
| 220 | // rdar://18259539 |
| 221 | size_t strlcpy(char * restrict dst, const char * restrict src, size_t size); |
| 222 | size_t strlcat(char * restrict dst, const char * restrict src, size_t size); |
| 223 | |
| 224 | void Test19(void) |
| 225 | { |
| 226 | static char b[40]; |
| 227 | static char buf[20]; |
| 228 | |
| 229 | strlcpy(buf, b, sizeof(b)); // expected-warning {{size argument in 'strlcpy' call appears to be size of the source; expected the size of the destination}} \\ |
| 230 | // expected-note {{change size argument to be the size of the destination}} |
| 231 | __builtin___strlcpy_chk(buf, b, sizeof(b), __builtin_object_size(buf, 0)); // expected-warning {{size argument in '__builtin___strlcpy_chk' call appears to be size of the source; expected the size of the destination}} \ |
| 232 | // expected-note {{change size argument to be the size of the destination}} \ |
| 233 | // expected-warning {{'strlcpy' will always overflow; destination buffer has size 20, but size argument is 40}} |
| 234 | |
| 235 | strlcat(buf, b, sizeof(b)); // expected-warning {{size argument in 'strlcat' call appears to be size of the source; expected the size of the destination}} \ |
| 236 | // expected-note {{change size argument to be the size of the destination}} |
| 237 | |
| 238 | __builtin___strlcat_chk(buf, b, sizeof(b), __builtin_object_size(buf, 0)); // expected-warning {{size argument in '__builtin___strlcat_chk' call appears to be size of the source; expected the size of the destination}} \ |
| 239 | // expected-note {{change size argument to be the size of the destination}} \ |
| 240 | // expected-warning {{'strlcat' will always overflow; destination buffer has size 20, but size argument is 40}} |
| 241 | } |
| 242 | |
| 243 | // rdar://11076881 |
| 244 | char * Test20(char *p, const char *in, unsigned n) |
| 245 | { |
| 246 | static char buf[10]; |
| 247 | |
| 248 | __builtin___memcpy_chk (&buf[6], in, 5, __builtin_object_size (&buf[6], 0)); // expected-warning {{'memcpy' will always overflow; destination buffer has size 4, but size argument is 5}} |
| 249 | |
| 250 | __builtin___memcpy_chk (p, "abcde", n, __builtin_object_size (p, 0)); |
| 251 | |
| 252 | __builtin___memcpy_chk (&buf[5], "abcde", 5, __builtin_object_size (&buf[5], 0)); |
| 253 | |
| 254 | __builtin___memcpy_chk (&buf[5], "abcde", n, __builtin_object_size (&buf[5], 0)); |
| 255 | |
| 256 | __builtin___memcpy_chk (&buf[6], "abcde", 5, __builtin_object_size (&buf[6], 0)); // expected-warning {{'memcpy' will always overflow; destination buffer has size 4, but size argument is 5}} |
| 257 | |
| 258 | return buf; |
| 259 | } |
| 260 | |
| 261 | typedef void (fn_t)(int); |
| 262 | |
| 263 | void test_builtin_launder(char *p, void *vp, const void *cvp, |
| 264 | const volatile int *ip, float *restrict fp, |
| 265 | fn_t *fn) { |
| 266 | __builtin_launder(); // expected-error {{too few arguments to function call, expected 1, have 0}} |
| 267 | __builtin_launder(p, p); // expected-error {{too many arguments to function call, expected 1, have 2}} |
| 268 | int x; |
| 269 | __builtin_launder(x); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}} |
| 270 | char *d = __builtin_launder(p); |
| 271 | __builtin_launder(vp); // expected-error {{void pointer argument to '__builtin_launder' is not allowed}} |
| 272 | __builtin_launder(cvp); // expected-error {{void pointer argument to '__builtin_launder' is not allowed}} |
| 273 | const volatile int *id = __builtin_launder(ip); |
| 274 | int *id2 = __builtin_launder(ip); // expected-warning {{discards qualifiers}} |
| 275 | float *fd = __builtin_launder(fp); |
| 276 | __builtin_launder(fn); // expected-error {{function pointer argument to '__builtin_launder' is not allowed}} |
| 277 | } |
| 278 | |
| 279 | void test21(const int *ptr) { |
| 280 | __sync_fetch_and_add(ptr, 1); // expected-error{{address argument to atomic builtin cannot be const-qualified ('const int *' invalid)}} |
| 281 | __atomic_fetch_add(ptr, 1, 0); // expected-error {{address argument to atomic operation must be a pointer to non-const type ('const int *' invalid)}} |
| 282 | } |
| 283 | |
| 284 | void test22(void) { |
| 285 | (void)__builtin_signbit(); // expected-error{{too few arguments to function call, expected 1, have 0}} |
| 286 | (void)__builtin_signbit(1.0, 2.0, 3.0); // expected-error{{too many arguments to function call, expected 1, have 3}} |
| 287 | (void)__builtin_signbit(1); // expected-error {{floating point classification requires argument of floating point type (passed in 'int')}} |
| 288 | (void)__builtin_signbit(1.0); |
| 289 | (void)__builtin_signbit(1.0f); |
| 290 | (void)__builtin_signbit(1.0L); |
| 291 | |
| 292 | (void)__builtin_signbitf(); // expected-error{{too few arguments to function call, expected 1, have 0}} |
| 293 | (void)__builtin_signbitf(1.0, 2.0, 3.0); // expected-error{{too many arguments to function call, expected 1, have 3}} |
| 294 | (void)__builtin_signbitf(1); |
| 295 | (void)__builtin_signbitf(1.0); |
| 296 | (void)__builtin_signbitf(1.0f); |
| 297 | (void)__builtin_signbitf(1.0L); |
| 298 | |
| 299 | (void)__builtin_signbitl(); // expected-error{{too few arguments to function call, expected 1, have 0}} |
| 300 | (void)__builtin_signbitl(1.0, 2.0, 3.0); // expected-error{{too many arguments to function call, expected 1, have 3}} |
| 301 | (void)__builtin_signbitl(1); |
| 302 | (void)__builtin_signbitl(1.0); |
| 303 | (void)__builtin_signbitl(1.0f); |
| 304 | (void)__builtin_signbitl(1.0L); |
| 305 | } |
| 306 | |
| 307 | // rdar://43909200 |
| 308 | #define memcpy(x,y,z) __builtin___memcpy_chk(x,y,z, __builtin_object_size(x,0)) |
| 309 | #define my_memcpy(x,y,z) __builtin___memcpy_chk(x,y,z, __builtin_object_size(x,0)) |
| 310 | |
| 311 | void test23() { |
| 312 | char src[1024]; |
| 313 | char buf[10]; |
| 314 | memcpy(buf, src, 11); // expected-warning{{'memcpy' will always overflow; destination buffer has size 10, but size argument is 11}} |
| 315 | my_memcpy(buf, src, 11); // expected-warning{{'memcpy' will always overflow; destination buffer has size 10, but size argument is 11}} |
| 316 | } |
| 317 | |