| // RUN: %clang_cc1 %s -verify |
| |
| void *fail1(int a) __attribute__((alloc_size)); //expected-error{{'alloc_size' attribute takes at least 1 argument}} |
| void *fail2(int a) __attribute__((alloc_size())); //expected-error{{'alloc_size' attribute takes at least 1 argument}} |
| |
| void *fail3(int a) __attribute__((alloc_size(0))); //expected-error{{'alloc_size' attribute parameter 1 is out of bounds}} |
| void *fail4(int a) __attribute__((alloc_size(2))); //expected-error{{'alloc_size' attribute parameter 1 is out of bounds}} |
| |
| void *fail5(int a, int b) __attribute__((alloc_size(0, 1))); //expected-error{{'alloc_size' attribute parameter 1 is out of bounds}} |
| void *fail6(int a, int b) __attribute__((alloc_size(3, 1))); //expected-error{{'alloc_size' attribute parameter 1 is out of bounds}} |
| |
| void *fail7(int a, int b) __attribute__((alloc_size(1, 0))); //expected-error{{'alloc_size' attribute parameter 2 is out of bounds}} |
| void *fail8(int a, int b) __attribute__((alloc_size(1, 3))); //expected-error{{'alloc_size' attribute parameter 2 is out of bounds}} |
| |
| int fail9(int a) __attribute__((alloc_size(1))); //expected-warning{{'alloc_size' attribute only applies to return values that are pointers}} |
| |
| int fail10 __attribute__((alloc_size(1))); //expected-warning{{'alloc_size' attribute only applies to non-K&R-style functions}} |
| |
| void *fail11(void *a) __attribute__((alloc_size(1))); //expected-error{{'alloc_size' attribute argument may only refer to a function parameter of integer type}} |
| |
| void *fail12(int a) __attribute__((alloc_size("abc"))); //expected-error{{'alloc_size' attribute requires parameter 1 to be an integer constant}} |
| void *fail12(int a) __attribute__((alloc_size(1, "abc"))); //expected-error{{'alloc_size' attribute requires parameter 2 to be an integer constant}} |
| void *fail13(int a) __attribute__((alloc_size(1U<<31))); //expected-error{{integer constant expression evaluates to value 2147483648 that cannot be represented in a 32-bit signed integer type}} |
| |
| void *(*PR31453)(int)__attribute__((alloc_size(1))); |
| |
| void *KR() __attribute__((alloc_size(1))); //expected-warning{{'alloc_size' attribute only applies to non-K&R-style functions}} |
| |
| // Applying alloc_size to function pointers should work: |
| void *(__attribute__((alloc_size(1))) * func_ptr1)(int); |
| void *(__attribute__((alloc_size(1, 2))) func_ptr2)(int, int); |
| |
| // TODO: according to GCC documentation the following should actually be the type |
| // “pointer to pointer to alloc_size attributed function returning void*” and should |
| // therefore be supported |
| void *(__attribute__((alloc_size(1))) **ptr_to_func_ptr)(int); // expected-warning{{'alloc_size' attribute only applies to non-K&R-style functions}} |
| // The following definitions apply the attribute to the pointer to the function pointer which should not be possible |
| void *(*__attribute__((alloc_size(1))) * ptr_to_func_ptr2)(int); // expected-warning{{'alloc_size' attribute only applies to non-K&R-style functions}} |
| void *(**__attribute__((alloc_size(1))) ptr_to_func_ptr2)(int); // expected-warning{{'alloc_size' attribute only applies to non-K&R-style functions}} |
| |
| // It should also work for typedefs: |
| typedef void *(__attribute__((alloc_size(1))) allocator_function_typdef)(int); |
| typedef void *(__attribute__((alloc_size(1, 2))) * allocator_function_typdef2)(int, int); |
| void *(__attribute__((alloc_size(1, 2))) * allocator_function_typdef3)(int, int); |
| // This typedef applies the alloc_size to the pointer to the function pointer and should not be allowed |
| void *(**__attribute__((alloc_size(1, 2))) * allocator_function_typdef4)(int, int); // expected-warning{{'alloc_size' attribute only applies to non-K&R-style functions}} |
| |
| // We should not be warning when assigning function pointers with and without the alloc size attribute |
| // since it doesn't change the type of the function |
| typedef void *(__attribute__((alloc_size(1))) * my_malloc_fn_pointer_type)(int); |
| typedef void *(*my_other_malloc_fn_pointer_type)(int); |
| void *fn(int i); |
| __attribute__((alloc_size(1))) void *fn2(int i); |
| |
| int main() { |
| my_malloc_fn_pointer_type f = fn; |
| my_other_malloc_fn_pointer_type f2 = fn; |
| my_malloc_fn_pointer_type f3 = fn2; |
| my_other_malloc_fn_pointer_type f4 = fn2; |
| } |