[thirdparty/gcc.git] / gcc / testsuite / gcc.dg / Wstringop-overflow-17.c

/* Test to verify that -Wstringop-overflow mentions the referenced object
   { dg-do compile }
   { dg-options "-O2 -Wall" } */

static void copy_n (char *d, const char *s, int n)
{
  while (n--)
    *d++ = *s++;
  *d = 0;           // { dg-warning "writing 1 byte into a region of size 0" }
}

void sink (void*);

void call_copy_n (const char *s)
{
  char a[7];        // { dg-message "at offset 7 into destination object 'a'" }
  copy_n (a, "1234567", 7);
  sink (a);
}
Commit	Line	Data
28a5fa54	1	/* Test to verify that -Wstringop-overflow mentions the referenced object
28a5fa54 MS	2	{ dg-do compile }
	3	{ dg-options "-O2 -Wall" } */
	4
	5	static void copy_n (char d, const char s, int n)
	6	{
	7	while (n--)
8817bd75	8	d++ = s++;
28a5fa54 MS	9	*d = 0; // { dg-warning "writing 1 byte into a region of size 0" }
	10	}
	11
	12	void sink (void*);
	13
	14	void call_copy_n (const char *s)
	15	{
eafe8ee7	16	char a[7]; // { dg-message "at offset 7 into destination object 'a'" }
28a5fa54 MS	17	copy_n (a, "1234567", 7);
	18	sink (a);
	19	}