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 | |