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Avoid -Wuse-after-free in tests [BZ #26779].

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Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Martin Sebor
2022-01-25 15:39:38 -07:00
parent e4ba8fee1a
commit c094c232eb
6 changed files with 60 additions and 2 deletions
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24
malloc/tst-malloc-too-large.c
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@@ -95,7 +95,15 @@ test_large_allocations (size_t size)
DIAG_POP_NEEDS_COMMENT;
#endif
TEST_VERIFY (errno == ENOMEM);
#if __GNUC_PREREQ (12, 0)
/* Ignore a warning about using a pointer made indeterminate by
a prior call to realloc(). */
DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
#endif
free (ptr_to_realloc);
#if __GNUC_PREREQ (12, 0)
DIAG_POP_NEEDS_COMMENT;
#endif
for (size_t nmemb = 1; nmemb <= 8; nmemb *= 2)
if ((size % nmemb) == 0)
@@ -113,14 +121,30 @@ test_large_allocations (size_t size)
test_setup ();
TEST_VERIFY (reallocarray (ptr_to_realloc, nmemb, size / nmemb) == NULL);
TEST_VERIFY (errno == ENOMEM);
#if __GNUC_PREREQ (12, 0)
/* Ignore a warning about using a pointer made indeterminate by
a prior call to realloc(). */
DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
#endif
free (ptr_to_realloc);
#if __GNUC_PREREQ (12, 0)
DIAG_POP_NEEDS_COMMENT;
#endif
ptr_to_realloc = malloc (16);
TEST_VERIFY_EXIT (ptr_to_realloc != NULL);
test_setup ();
TEST_VERIFY (reallocarray (ptr_to_realloc, size / nmemb, nmemb) == NULL);
TEST_VERIFY (errno == ENOMEM);
#if __GNUC_PREREQ (12, 0)
/* Ignore a warning about using a pointer made indeterminate by
a prior call to realloc(). */
DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
#endif
free (ptr_to_realloc);
#if __GNUC_PREREQ (12, 0)
DIAG_POP_NEEDS_COMMENT;
#endif
}
else
break;