gcc/testsuite/gcc.dg/attr-alloc_size.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -Wall" } */
   3
   4 extern void abort (void);
   5
   6 #include "../gcc.c-torture/execute/builtins/chk.h"
   7
   8 extern char *mallocminus1(int size) __attribute__((alloc_size(-1))); /* { dg-warning "parameter outside range" } */
   9 extern char *malloc0(int size) __attribute__((alloc_size(0))); /* { dg-warning "parameter outside range" } */
  10 extern char *malloc1(int size) __attribute__((alloc_size(1)));
  11 extern char *malloc2(int empty, int size) __attribute__((alloc_size(2)));
  12 extern char *calloc1(int size, int elements) __attribute__((alloc_size(1,2)));
  13 extern char *calloc2(int size, int empty, int elements) __attribute__((alloc_size(1,3)));
  14 extern char *balloc1(void *size) __attribute__((alloc_size(1)));
  15
  16 void
  17 test (void)
  18 {
  19   char *p;
  20
  21   p = malloc0 (6);
  22   strcpy (p, "Hello");
  23   p = malloc1 (6);
  24   strcpy (p, "Hello");
  25   strcpy (p, "Hello World"); /* { dg-warning "will always overflow" "strcpy" } */
  26   p = malloc2 (__INT_MAX__ >= 1700000 ? 424242 : __INT_MAX__ / 4, 6);
  27   strcpy (p, "World");
  28   strcpy (p, "Hello World"); /* { dg-warning "will always overflow" "strcpy" } */
  29   p = calloc1 (2, 5);
  30   strcpy (p, "World");
  31   strcpy (p, "Hello World"); /* { dg-warning "will always overflow" "strcpy" } */
  32   p = calloc2 (2, __INT_MAX__ >= 1700000 ? 424242 : __INT_MAX__ / 4, 5);
  33   strcpy (p, "World");
  34   strcpy (p, "Hello World"); /* { dg-warning "will always overflow" "strcpy" } */
  35 }
  36