Viewing file:  builtin-printf-warn-2.c (10.81 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* PR middle-end/88993 - GCC 9 -Wformat-overflow=2 should reflect real
libc limits
Verify that -Wformat-overflow=2 "may exceed" warnings are not issued
for printf family of functions.
{ dg-do compile }
{ dg-options "-O -Wformat -Wformat-overflow=2 -ftrack-macro-expansion=0" }
{ dg-require-effective-target int32plus } */
#define INT_MAX __INT_MAX__
typedef __SIZE_TYPE__ size_t;
#if !__cplusplus
typedef __WCHAR_TYPE__ wchar_t;
#endif
#define T(...) __builtin_printf (__VA_ARGS__)
/* Exercise the "%c" directive with constant arguments. */
void test_printf_c_const (int width)
{
/* Verify that a warning is only issued when the output is definitely
exceeded but not when exceeding it is possible but not inevitable. */
T ("%2147483647c", '1');
T ("X%2147483647c", '2'); /* { dg-warning ".%*c. directive output of \[0-9\]+ bytes causes result to exceed .INT_MAX." } */
T ("%2147483647cY", '3'); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("%2147483648c", '1'); /* { dg-warning ".%2147483648c. directive output of 2147483648 bytes exceeds .INT_MAX." } */
T ("X%2147483649c", '2'); /* { dg-warning ".%2147483649c. directive output of 2147483649 bytes exceeds .INT_MAX." } */
T ("%2147483650cY", '3'); /* { dg-warning ".%2147483650c. directive output of 2147483650 bytes exceeds .INT_MAX." } */
T ("%*c", INT_MAX, '1');
T ("X%*c", INT_MAX, '1'); /* { dg-warning ".%*c. directive output of \[0-9\]+ bytes causes result to exceed .INT_MAX." } */
T ("%*cY", INT_MAX, '1'); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("X%*c", INT_MAX - 1, '1');
T ("%*cY", INT_MAX - 1, '1');
T ("%*cY", INT_MAX, '1'); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("X%*c", INT_MAX, '1'); /* { dg-warning ".%*c. directive output of \[0-9\]+ bytes causes result to exceed .INT_MAX." } */
if (width > INT_MAX - 1)
width = INT_MAX - 1;
T ("%*c", width, '1');
T ("X%*c", width, '1');
T ("%*cY", width, '1');
T ("%*c", width, '1');
T ("X%*c", width, '1');
T ("%*cY", width, '1');
T ("%*c%*c", width, '1', width, '2');
T ("X%*cY%*cZ", width, '1', width, '2');
if (width < 4096)
width = 4096;
T ("%*c", width, '1');
T ("X%*c", width, '1');
T ("%*cY", width, '1');
if (width < INT_MAX - 1)
width = INT_MAX - 1;
T ("%*c", width, '1');
T ("X%*c", width, '2');
T ("%*cY", width, '3');
T ("X%*cY", width, '4'); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
}
/* Exercise the "%s" directive with constant arguments. */
void test_printf_s_const (int width, const char *s)
{
T ("%2147483647s", s);
T ("X%2147483647s", s); /* { dg-warning ".%2147483647s. directive output between 2147483647 and \[0-9\]+ bytes causes result to exceed .INT_MAX." } */
T ("%2147483647sY", s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("%2147483648s", s); /* { dg-warning "%2147483648s. directive output between 2147483648 and \[0-9\]+ bytes exceeds .INT_MAX." } */
T ("X%2147483649s", s); /* { dg-warning "%2147483649s. directive output between 2147483649 and \[0-9\]+ bytes exceeds .INT_MAX." } */
T ("%2147483650sY", s); /* { dg-warning ".%2147483650s. directive output between 2147483650 and \[0-9\]+ bytes exceeds .INT_MAX." } */
T ("%*s", INT_MAX, s);
T ("X%*s", INT_MAX, s); /* { dg-warning ".%\\\*s. directive output between 2147483647 and \[0-9\]+ bytes causes result to exceed .INT_MAX." } */
T ("%*sY", INT_MAX, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("X%*s", INT_MAX - 1, s);
T ("%*sY", INT_MAX - 1, s);
T ("%*sY", INT_MAX, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("X%*s", INT_MAX, s); /* { dg-warning ".%\\\*s. directive output between 2147483647 and \[0-9\]+ bytes causes result to exceed .INT_MAX." } */
if (width > INT_MAX - 1)
width = INT_MAX - 1;
T ("%*s", width, s);
T ("X%*s", width, s);
T ("%*sY", width, s);
T ("%*s", width, s);
T ("X%*s", width, s);
T ("%*sY", width, s);
T ("%*s%*s", width, s, width, s);
T ("X%*sY%*sZ", width, s, width, s);
if (width < 4096)
width = 4096;
T ("%*s", width, s);
T ("X%*s", width, s);
T ("%*sY", width, s);
if (width < INT_MAX - 1)
width = INT_MAX - 1;
T ("%*s", width, s);
T ("X%*s", width, s);
T ("%*sY", width, s);
T ("X%*sY", width, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
}
/* Exercise the "%ls" directive with constant arguments. */
void test_printf_ls_const (int width, const wchar_t *s)
{
T ("%2147483647ls", s);
T ("X%2147483647ls", s); /* { dg-warning ".%2147483647ls. directive output between 2147483647 and \[0-9\]+ bytes causes result to exceed .INT_MAX." } */
T ("%2147483647lsY", s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("%2147483648ls", s); /* { dg-warning "%2147483648ls. directive output between 2147483648 and \[0-9\]+ bytes exceeds .INT_MAX." } */
T ("X%2147483649ls", s); /* { dg-warning "%2147483649ls. directive output between 2147483649 and \[0-9\]+ bytes exceeds .INT_MAX." } */
T ("%2147483650lsY", s); /* { dg-warning ".%2147483650ls. directive output between 2147483650 and \[0-9\]+ bytes exceeds .INT_MAX." } */
T ("%*ls", INT_MAX, s);
T ("X%*ls", INT_MAX, s); /* { dg-warning ".%\\\*ls. directive output between 2147483647 and \[0-9\]+ bytes causes result to exceed .INT_MAX." } */
T ("%*lsY", INT_MAX, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("X%*ls", INT_MAX - 1, s);
T ("%*lsY", INT_MAX - 1, s);
T ("%*lsY", INT_MAX, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("X%*ls", INT_MAX, s); /* { dg-warning ".%\\\*ls. directive output between 2147483647 and \[0-9\]+ bytes causes result to exceed .INT_MAX." } */
if (width > INT_MAX - 1)
width = INT_MAX - 1;
T ("%*ls", width, s);
T ("X%*ls", width, s);
T ("%*lsY", width, s);
T ("%*ls", width, s);
T ("X%*ls", width, s);
T ("%*lsY", width, s);
T ("%*ls%*ls", width, s, width, s);
T ("X%*lsY%*lsZ", width, s, width, s);
if (width < 4096)
width = 4096;
T ("%*ls", width, s);
T ("X%*ls", width, s);
T ("%*lsY", width, s);
if (width < INT_MAX - 1)
width = INT_MAX - 1;
T ("%*ls", width, s);
T ("X%*ls", width, s);
T ("%*lsY", width, s);
T ("X%*lsY", width, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
}
/* Also exercise printf_chk. */
#undef T
#define T(...) __builtin___printf_chk (__VA_ARGS__)
void test_printf_chk_s_const (int width)
{
const char *s = "0123456789";
T (0, "%2147483647s", s);
T (0, "X%2147483647s", s); /* { dg-warning ".%2147483647s. directive output of 2147483647 bytes causes result to exceed .INT_MAX." } */
T (0, "%2147483647sY", s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T (0, "%2147483648s", s); /* { dg-warning "%2147483648s. directive output of 2147483648 bytes exceeds .INT_MAX." } */
T (0, "X%2147483649s", s); /* { dg-warning "%2147483649s. directive output of 2147483649 bytes exceeds .INT_MAX." } */
T (0, "%2147483650sY", s); /* { dg-warning ".%2147483650s. directive output of 2147483650 bytes exceeds .INT_MAX." } */
T (0, "%*s", INT_MAX, s);
T (0, "X%*s", INT_MAX, s); /* { dg-warning ".%\\\*s. directive output of 2147483647 bytes causes result to exceed .INT_MAX." } */
T (0, "%*sY", INT_MAX, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T (0, "X%*s", INT_MAX - 1, s);
T (0, "%*sY", INT_MAX - 1, s);
T (0, "%*sY", INT_MAX, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T (0, "X%*s", INT_MAX, s); /* { dg-warning ".%\\\*s. directive output of 2147483647 bytes causes result to exceed .INT_MAX." } */
if (width > INT_MAX - 1)
width = INT_MAX - 1;
T (0, "%*s", width, s);
T (0, "X%*s", width, s);
T (0, "%*sY", width, s);
T (0, "%*s", width, s);
T (0, "X%*s", width, s);
T (0, "%*sY", width, s);
T (0, "%*s%*s", width, s, width, s);
T (0, "X%*sY%*sZ", width, s, width, s);
if (width < 4096)
width = 4096;
T (0, "%*s", width, s);
T (0, "X%*s", width, s);
T (0, "%*sY", width, s);
if (width < INT_MAX - 1)
width = INT_MAX - 1;
T (0, "%*s", width, s);
T (0, "X%*s", width, s);
T (0, "%*sY", width, s);
T (0, "X%*sY", width, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
}
/* And finally exercise printf_unlocked. */
#undef T
#define T(...) __builtin_printf_unlocked (__VA_ARGS__)
void test_printf_unlocked_s_const (int width)
{
const char *s = "0123456789";
T ("%2147483647s", s);
T ("X%2147483647s", s); /* { dg-warning ".%2147483647s. directive output of 2147483647 bytes causes result to exceed .INT_MAX." } */
T ("%2147483647sY", s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("%2147483648s", s); /* { dg-warning "%2147483648s. directive output of 2147483648 bytes exceeds .INT_MAX." } */
T ("X%2147483649s", s); /* { dg-warning "%2147483649s. directive output of 2147483649 bytes exceeds .INT_MAX." } */
T ("%2147483650sY", s); /* { dg-warning ".%2147483650s. directive output of 2147483650 bytes exceeds .INT_MAX." } */
T ("%*s", INT_MAX, s);
T ("X%*s", INT_MAX, s); /* { dg-warning ".%\\\*s. directive output of 2147483647 bytes causes result to exceed .INT_MAX." } */
T ("%*sY", INT_MAX, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("X%*s", INT_MAX - 1, s);
T ("%*sY", INT_MAX - 1, s);
T ("%*sY", INT_MAX, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
T ("X%*s", INT_MAX, s); /* { dg-warning ".%\\\*s. directive output of 2147483647 bytes causes result to exceed .INT_MAX." } */
if (width > INT_MAX - 1)
width = INT_MAX - 1;
T ("%*s", width, s);
T ("X%*s", width, s);
T ("%*sY", width, s);
T ("%*s", width, s);
T ("X%*s", width, s);
T ("%*sY", width, s);
T ("%*s%*s", width, s, width, s);
T ("X%*sY%*sZ", width, s, width, s);
if (width < 4096)
width = 4096;
T ("%*s", width, s);
T ("X%*s", width, s);
T ("%*sY", width, s);
if (width < INT_MAX - 1)
width = INT_MAX - 1;
T ("%*s", width, s);
T ("X%*s", width, s);
T ("%*sY", width, s);
T ("X%*sY", width, s); /* { dg-warning ".Y. directive output of 1 bytes causes result to exceed .INT_MAX." } */
}
|
