Viewing file:  Wstringop-overflow-71.c (2.64 KB) -rw-r--r--
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/* PR tree-optimization/97027 - missing warning on buffer overflow storing
a larger scalar into a smaller array
Verify warnings for overflow by stores of results of built-in functions.
{ dg-do compile }
{ dg-options "-O2" }
{ dg-require-effective-target alloca } */
typedef __INT16_TYPE__ int16_t;
typedef __SIZE_TYPE__ size_t;
extern int abs (int);
extern void* alloca (size_t);
extern double nan (const char *);
#ifdef __DEC32_MAX__
_Decimal32 nand32 (const char *);
#else
/* _Decimal32 is supported only conditionally and not available on all
targets. */
# define _Decimal32 double
# define nand32(s) nan (s)
#endif
extern size_t strlen (const char *);
extern char* strcpy (char *, const char *);
extern unsigned char ax[], a1[1], a2[2], a8[8];
void nowarn_abs (int i)
{
*(int *)ax = abs (i);
*(char *)a1 = abs (i);
}
void warn_abs (int i)
{
*(int *)a1 = abs (i); // { dg-warning "\\\[-Wstringop-overflow" }
}
void nowarn_alloca (size_t n)
{
*(void **)ax = alloca (n);
}
void warn_alloca (size_t n)
{
*(void **)a1 = alloca (n); // { dg-warning "\\\[-Wstringop-overflow" }
}
void nowarn_complex (double x, double i)
{
*(_Complex double *)ax = __builtin_complex (x, i);
}
void warn_complex (double x, double i)
{
_Complex double *p = (_Complex double *)a1;
*p = __builtin_complex (x, i); // { dg-warning "\\\[-Wstringop-overflow" "pr101455" { xfail *-*-* } }
}
__attribute__ ((noipa)) void nowarn_nan (const char *s)
{
*(double *)ax = nan (s);
}
__attribute__ ((noipa)) void warn_nan (const char *s)
{
*(double *)a1 = nan (s); // { dg-warning "\\\[-Wstringop-overflow" }
}
__attribute__ ((noipa)) void nowarn_nand32 (const char *s)
{
*(_Decimal32 *)ax = nand32 (s);
}
__attribute__ ((noipa)) void warn_nand32 (const char *s)
{
*(_Decimal32 *)a1 = nand32 (s); // { dg-warning "\\\[-Wstringop-overflow" }
}
void nowarn_strlen (const char *s1, const char *s2, const char *s3)
{
*(char *)ax = strlen (s1);
*(char *)a1 = strlen (s2);
*(size_t *)a8 = strlen (s3);
}
void warn_strlen (const char *s1, const char *s2)
{
*(int16_t *)a1 = strlen (s1); // { dg-warning "\\\[-Wstringop-overflow" }
*(size_t *)a2 = strlen (s2); // { dg-warning "\\\[-Wstringop-overflow" "!ptr_eq_short" { target { ! ptr_eq_short } } }
}
void nowarn_strcpy (char *s1, char *s2, const char *s3)
{
*(char **)ax = strcpy (s1, s2);
*(char **)a8 = strcpy (s2, s3);
}
void warn_strcpy (char *s1, char *s2, const char *s3)
{
*(char **)a1 = strcpy (s1, s2); // { dg-warning "\\\[-Wstringop-overflow" }
*(char **)a2 = strcpy (s2, s3); // { dg-warning "\\\[-Wstringop-overflow" "!ptr_eq_short" { target { ! ptr_eq_short } } }
}
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