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Suppress GCC 10 true positive warnings [BZ #25967]

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Suppress or avoid warnings in tests that exercise failure modes by making
calls with invalid arguments.

Reviewed-by: DJ Delorie <dj@redhat.com>
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Reviewed-by: Joseph Myers <joseph@codesourcery.com>
This commit is contained in:
Martin Sebor 2020-05-11 11:29:39 -06:00
parent e627106266
commit 978e8ac39f
2 changed files with 30 additions and 3 deletions
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21
io/tst-getcwd.c
View File

@ -23,6 +23,7 @@
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <libc-diag.h>
#define TEST_FUNCTION do_test ()
@ -58,7 +59,13 @@ do_test (void)
bufs[i] = (char *) malloc (sbs);
}
/* Avoid warnings about the first argument being null when the second
is nonzero. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (10.1, "-Wnonnull");
bufs[i] = getcwd (NULL, sbs);
DIAG_POP_NEEDS_COMMENT;
lens[i] = sbs;
if (bufs[i] == NULL)
{
@ -96,12 +103,17 @@ getcwd (NULL, sbs) = \"%s\", getcwd (thepath, sizeof thepath) = \"%s\"\n",
free (bufs[i]);
/* Test whether the function signals success despite the buffer
being too small. */
being too small.
Avoid warnings about the first argument being null when the second
is nonzero. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (10.1, "-Wnonnull");
if (getcwd (NULL, len) != NULL)
{
puts ("getcwd (NULL, len) didn't failed");
return 1;
}
DIAG_POP_NEEDS_COMMENT;
bufs[0] = malloc (len);
bufs[1] = malloc (len);
@ -132,13 +144,18 @@ getcwd (NULL, sbs) = \"%s\", getcwd (thepath, sizeof thepath) = \"%s\"\n",
return 1;
}
/* Now test handling of correctly sized buffers. */
/* Now test handling of correctly sized buffers.
Again. avoid warnings about the first argument being null when
the second is nonzero. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (10.1, "-Wnonnull");
bufs[0] = getcwd (NULL, len + 1);
if (bufs[0] == NULL)
{
puts ("getcwd (NULL, len + 1) failed");
return 1;
}
DIAG_POP_NEEDS_COMMENT;
free (bufs[0]);
memset (thepath, '\xff', sizeof thepath);

12
posix/test-errno.c
View File

@ -34,6 +34,7 @@
#include <sys/uio.h>
#include <unistd.h>
#include <netinet/in.h>
#include <libc-diag.h>
/* This is not an exhaustive test: only system calls that can be
persuaded to fail with a consistent error code and no side effects
@ -119,7 +120,16 @@ do_test (void)
fails |= test_wrp (EBADF, fstatfs, -1, &sfs);
fails |= test_wrp (EBADF, fsync, -1);
fails |= test_wrp (EBADF, ftruncate, -1, 0);
#if __GNUC_PREREQ (7, 0)
DIAG_PUSH_NEEDS_COMMENT;
/* Avoid warnings about the second (size) argument being negative. */
DIAG_IGNORE_NEEDS_COMMENT (10.1, "-Wstringop-overflow");
#endif
fails |= test_wrp (EINVAL, getgroups, -1, 0);
#if __GNUC_PREREQ (7, 0)
DIAG_POP_NEEDS_COMMENT;
#endif
fails |= test_wrp (EBADF, getpeername, -1, &sa, &sl);
fails |= test_wrp (EBADF, getsockname, -1, &sa, &sl);
fails |= test_wrp (EBADF, getsockopt, -1, 0, 0, buf, &sl);
@ -134,7 +144,7 @@ do_test (void)
fails |= test_wrp (EINVAL, munmap, (void *) -1, 0);
fails |= test_wrp (EISDIR, open, "/bin", EISDIR, O_WRONLY);
fails |= test_wrp (EBADF, read, -1, buf, 1);
fails |= test_wrp (EINVAL, readlink, "/", buf, -1);
fails |= test_wrp (EINVAL, readlink, "/", buf, sizeof buf);
fails |= test_wrp (EBADF, readv, -1, iov, 1);
fails |= test_wrp (EBADF, recv, -1, buf, 1, 0);
fails |= test_wrp (EBADF, recvfrom, -1, buf, 1, 0, &sa, &sl);