Viewing file:  attr-nonstring-4.c (2.49 KB) -rw-r--r--
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/* PR middle-end/81384 - built-in form of strnlen missing
Verify that a strnlen bound in excess of the maximum object size
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 size_t strnlen (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 (size_t);
#define T(attr, N, bound) \
do { \
extern attr char UNIQ (a)[N]; \
sink (strnlen (UNIQ (a), bound)); \
} while (0)
void strnlen_cst (void)
{
size_t n = DIFF_MAX;
T (STR, /* [] */, n);
T (STR, /* [] */, n + 1); /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */
T (STR, 1, n);
T (STR, 2, n + 1); /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */
T (NS, /* [] */, n);
T (NS, /* [] */, n + 1); /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */
T (NS, 9, n); /* { dg-warning "argument 1 declared attribute 'nonstring' is smaller than the specified bound \\d+|specified bound \\d+ exceeds source size 9" } */
T (NS, 10, n + 1); /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */
}
void strnlen_range (void)
{
size_t n = DIFF_MAX;
n = UR (n, n + 1);
T (STR, /* [] */, n);
T (STR, /* [] */, n + 1); /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */
T (STR, 1, n); /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds source size 1" } */
T (STR, 2, n + 1); /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */
T (NS, /* [] */, n);
T (NS, /* [] */, n + 1); /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */
T (NS, 9, n); /* { dg-warning "argument 1 declared attribute 'nonstring' is smaller than the specified bound \\\[\\d+, \\d+]|specified bound \\\[\\d+, \\d+] exceeds source size 9" } */
T (NS, 10, n + 1); /* { dg-warning "specified bound \\\[\[0-9\]+, \[0-9\]+] exceeds maximum object size \[0-9\]+" } */
}
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