gcc/testsuite/gcc.dg/attr-nonstring-3.c

/* PR middle-end/81384 - built-in form of strnlen missing

   Since the strnlen patch affects the handling for strncmp and other
   bounded functions, verify that a bound in excess of the maximum
   object size specified for strncmp is diagnosed regardless of
   attribute nonstring.  Also verify that a bound that's greater than
   the size of a non-string array is diagnosed, even if it's not in
   excess of the maximum object size.

   { dg-do compile }
   { dg-options "-O2 -Wall -ftrack-macro-expansion=0" } */

#include "range.h"

extern int strncmp (const char*, const char*, size_t);

#define STR   /* not non-string */
#define NS    __attribute__ ((nonstring))

#define _CAT(s, n)   s ## n
#define CAT(s, n)    _CAT (s, n)
#define UNIQ(n)      CAT (n, __LINE__)

void sink (int);

#define T(at1, N1, at2, N2, bound)		\
  do {						\
    extern at1 char UNIQ (a)[N1];		\
    extern at2 char UNIQ (b)[N2];		\
    sink (strncmp (UNIQ (a), UNIQ (b), bound));	\
  } while (0)

void strncmp_cst (void)
{
  size_t n = DIFF_MAX;

  T (STR, /* [] */, STR, /* [] */, n);
  T (STR, /* [] */, STR, /* [] */, n + 1);    /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (STR, 1, STR, /* [] */, 1);
  T (STR, 1, STR, /* [] */, n);
  T (STR, 2, STR, /* [] */, n + 1);           /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (STR, /* [] */, STR, 3, 3);
  T (STR, /* [] */, STR, 3, n);
  T (STR, /* [] */, STR, 4, n + 1);           /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (STR, /* [] */, NS, /* [] */, 3);
  T (STR, /* [] */, NS, /* [] */, n);
  T (STR, /* [] */, NS, /* [] */, n + 1);     /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (STR, 5, NS, /* [] */, 4);
  T (STR, 5, NS, /* [] */, 5);
  T (STR, 5, NS, /* [] */, 6);
  T (STR, 5, NS, /* [] */, n);
  T (STR, 6, NS, /* [] */, n + 1);            /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (STR, /* [] */, NS, 7, n);                /* { dg-warning "argument 2 declared attribute .nonstring. is smaller than the specified bound" } */

  T (STR, /* [] */, NS, 8, n + 1);            /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (NS, /* [] */, STR, /* [] */, n);
  T (NS, /* [] */, STR, /* [] */, n + 1);     /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (NS, 9, STR, /* [] */, n);                /* { dg-warning "argument 1 declared attribute 'nonstring' is smaller than the specified bound \[0-9\]+" } */
  T (NS, 10, STR, /* [] */, n + 1);           /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (NS, /* [] */, STR, 11, 11);
  T (NS, /* [] */, STR, 11, n);
  T (NS, /* [] */, STR, 12, n + 1);           /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (NS, /* [] */, NS, /* [] */, n);
  T (NS, /* [] */, NS, /* [] */, n + 1);      /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (NS, 13, NS, /* [] */, 13);
  T (NS, 13, NS, /* [] */, n);                /* { dg-warning "argument 1 declared attribute 'nonstring' is smaller than the specified bound \[0-9\]+" } */
  T (NS, 14, NS, /* [] */, n + 1);            /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */

  T (NS, /* [] */, NS, 15, 15);
  T (NS, /* [] */, NS, 15, 16);               /* { dg-warning "argument 2 declared attribute 'nonstring' is smaller than the specified bound 16" } */
  T (NS, /* [] */, NS, 16, n + 1);            /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */
}


void strncmp_range (void)
{
  size_t n = DIFF_MAX;
  n = UR (n, n + 1);

  T (STR, /* [] */, STR, /* [] */, n);
  T (STR, /* [] */, STR, /* [] */, n + 1);    /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (STR, 1, STR, /* [] */, 1);
  T (STR, 1, STR, /* [] */, n);
  T (STR, 2, STR, /* [] */, n + 1);           /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (STR, /* [] */, STR, 3, n);
  T (STR, /* [] */, STR, 4, n + 1);           /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (STR, /* [] */, NS, /* [] */, n);
  T (STR, /* [] */, NS, /* [] */, n + 1);     /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (STR, 5, NS, /* [] */, n);
  T (STR, 6, NS, /* [] */, n + 1);            /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (STR, /* [] */, NS, 7, n);                /* { dg-warning "argument 2 declared attribute 'nonstring' is smaller than the specified bound \\\[\[0-9\]+, \[0-9\]+]" } */

  T (STR, /* [] */, NS, 8, n + 1);            /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (NS, /* [] */, STR, /* [] */, n);
  T (NS, /* [] */, STR, /* [] */, n + 1);     /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (NS, 9, STR, /* [] */, n);                /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound" } */
  T (NS, 10, STR, /* [] */, n + 1);           /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (NS, /* [] */, STR, 11, n);
  T (NS, /* [] */, STR, 12, n + 1);           /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (NS, /* [] */, NS, /* [] */, n);
  T (NS, /* [] */, NS, /* [] */, n + 1);      /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (NS, 13, NS, /* [] */, n);                /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound" } */
  T (NS, 14, NS, /* [] */, n + 1);            /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */

  T (NS, /* [] */, NS, 15, n);                /* { dg-warning "argument 2 declared attribute .nonstring. is smaller than the specified bound" } */
  T (NS, /* [] */, NS, 16, n + 1);            /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */
}