attr-malloc.c revision ba772ba69ba0661f059f49c58395f870eb5c4df3 
1// RUN: %clang -Xclang -verify -fsyntax-only %s
2// RUN: %clang -emit-llvm -S -o %t %s
3
4#include <stddef.h>
5
6// Declare malloc here explicitly so we don't depend on system headers.
7void * malloc(size_t) __attribute((malloc));
8
9int no_vars __attribute((malloc)); // expected-warning {{functions returning a pointer type}}
10
11void  returns_void  (void) __attribute((malloc)); // expected-warning {{functions returning a pointer type}}
12int   returns_int   (void) __attribute((malloc)); // expected-warning {{functions returning a pointer type}}
13int * returns_intptr(void) __attribute((malloc)); // no-warning
14typedef int * iptr;
15iptr  returns_iptr  (void) __attribute((malloc)); // no-warning
16
17__attribute((malloc)) void *(*f)(); //  expected-warning{{'malloc' attribute only applies to functions returning a pointer type}}
18__attribute((malloc)) int (*g)(); // expected-warning{{'malloc' attribute only applies to functions returning a pointer type}}
19
20__attribute((malloc))
21void * xalloc(unsigned n) { return malloc(n); } // no-warning
22// RUN: grep 'define noalias .* @xalloc(' %t
23
24#define malloc_like __attribute((__malloc__))
25void * xalloc2(unsigned) malloc_like;
26void * xalloc2(unsigned n) { return malloc(n); }
27// RUN: grep 'define noalias .* @xalloc2(' %t
28
29