mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-17 08:21:07 +00:00
6f30e59fc9
Recent GCC -Wformat-overflow= changes result in some printf tests failing to build, because those tests are deliberately testing the handling of formats writing more than INT_MAX characters and the handling of NULL arguments to the %s format, which GCC now warns about. This patch duly disables -Wformat-overflow= for the relevant calls to printf functions. Tested with build-many-glibcs.py with GCC mainline for aarch64-linux-gnu. * stdio-common/bug22.c: Include <libc-diag.h>. (do_test): Disable -Wformat-overflow= warnings around fprintf calls outputting more than INT_MAX characters. * stdio-common/tst-printf.c: Disable -Wformat-overflow= warnings around printf call with NULL %s argument.
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
/* BZ #5424 */
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <libc-diag.h>
|
|
|
|
/* INT_MAX + 1 */
|
|
#define N 2147483648
|
|
|
|
/* (INT_MAX / 2) + 2 */
|
|
#define N2 1073741825
|
|
|
|
/* INT_MAX - 3 */
|
|
#define N3 2147483644
|
|
|
|
#define STRINGIFY(S) #S
|
|
#define MAKE_STR(S) STRINGIFY(S)
|
|
|
|
#define SN MAKE_STR(N)
|
|
#define SN2 MAKE_STR(N2)
|
|
#define SN3 MAKE_STR(N3)
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
int ret;
|
|
|
|
FILE *fp = fopen ("/dev/null", "w");
|
|
if (fp == NULL)
|
|
{
|
|
puts ("cannot open /dev/null");
|
|
return 1;
|
|
}
|
|
|
|
/* GCC 9 warns about output of more than INT_MAX characters; this is
|
|
deliberately tested here. */
|
|
DIAG_PUSH_NEEDS_COMMENT;
|
|
#if __GNUC_PREREQ (7, 0)
|
|
DIAG_IGNORE_NEEDS_COMMENT (9, "-Wformat-overflow=");
|
|
#endif
|
|
ret = fprintf (fp, "%" SN "d", 1);
|
|
DIAG_POP_NEEDS_COMMENT;
|
|
printf ("ret = %d\n", ret);
|
|
if (ret != -1 || errno != EOVERFLOW)
|
|
return 1;
|
|
|
|
/* GCC 9 warns about output of more than INT_MAX characters; this is
|
|
deliberately tested here. */
|
|
DIAG_PUSH_NEEDS_COMMENT;
|
|
#if __GNUC_PREREQ (7, 0)
|
|
DIAG_IGNORE_NEEDS_COMMENT (9, "-Wformat-overflow=");
|
|
#endif
|
|
ret = fprintf (fp, "%." SN "d", 1);
|
|
DIAG_POP_NEEDS_COMMENT;
|
|
printf ("ret = %d\n", ret);
|
|
if (ret != -1 || errno != EOVERFLOW)
|
|
return 1;
|
|
|
|
ret = fprintf (fp, "%." SN3 "d", 1);
|
|
printf ("ret = %d\n", ret);
|
|
if (ret != -1 || errno != EOVERFLOW)
|
|
return 1;
|
|
|
|
/* GCC 9 warns about output of more than INT_MAX characters; this is
|
|
deliberately tested here. */
|
|
DIAG_PUSH_NEEDS_COMMENT;
|
|
#if __GNUC_PREREQ (7, 0)
|
|
DIAG_IGNORE_NEEDS_COMMENT (9, "-Wformat-overflow=");
|
|
#endif
|
|
ret = fprintf (fp, "%" SN2 "d%" SN2 "d", 1, 1);
|
|
DIAG_POP_NEEDS_COMMENT;
|
|
printf ("ret = %d\n", ret);
|
|
|
|
return ret != -1 || errno != EOVERFLOW;
|
|
}
|
|
|
|
#define TIMEOUT 60
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|