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/* Test whether buffer overflow warnings for __strncat_chk builtin

   are emitted properly.  */

/* { dg-do compile } */

/* { dg-options "-O2 -std=gnu99" } */

extern void abort (void);

#include "../gcc.c-torture/execute/builtins/chk.h"

char buf1[20];

char *q;

void

test (int arg, ...)

{

  char *p = &buf1[10];

  *p = 0;

  strncat (p, "abcdefg", 9);

  *p = 0;

  strncat (p, "abcdefghi", 9);

  *p = 0;

  strncat (p, "abcdefghij", 9);

  *p = 0;

  strncat (p, "abcdefghi", 10);

  *p = 0;

  strncat (p, "abcdefghij", 10); /* { dg-warning "will always overflow" } */

  *p = 0;

  strncat (p, "abcdefgh", 11);

  *p = 0;

  strncat (p, "abcdefghijkl", 11); /* { dg-warning "will always overflow" } */

  *p = 0;

  strncat (p, q, 9);

  *p = 0;

  strncat (p, q, 10); /* { dg-warning "might overflow" } */

  *p = 0;

  strncat (p, q, 11); /* { dg-warning "might overflow" } */

}