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glibc/malloc/tst-mallocfork.c
Joseph Myers e6e2424390 Fix malloc tests build with GCC 10.
GCC mainline has recently added warn_unused_result attributes to some
malloc-like built-in functions, where glibc previously had them in its
headers only for __USE_FORTIFY_LEVEL > 0.  This results in those
attributes being newly in effect for building the glibc testsuite, so
resulting in new warnings that break the build where tests
deliberately call such functions and ignore the result.  Thus patch
duly adds calls to DIAG_* macros around those calls to disable the
warning.

Tested with build-many-glibcs.py for aarch64-linux-gnu.

	* malloc/tst-calloc.c: Include <libc-diag.h>.
	(null_test): Ignore -Wunused-result around calls to calloc.
	* malloc/tst-mallocfork.c: Include <libc-diag.h>.
	(do_test): Ignore -Wunused-result around call to malloc.
2019-06-10 22:12:08 +00:00

58 lines
1.2 KiB
C

/* Derived from the test case in
https://sourceware.org/bugzilla/show_bug.cgi?id=838. */
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <libc-diag.h>
static void
sig_handler (int signum)
{
pid_t child = fork ();
if (child == 0)
exit (0);
TEMP_FAILURE_RETRY (waitpid (child, NULL, 0));
}
static int
do_test (void)
{
pid_t parent = getpid ();
struct sigaction action = { .sa_handler = sig_handler };
sigemptyset (&action.sa_mask);
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (10, "-Wunused-result");
/* The result of malloc is deliberately ignored, so do not warn
about that. */
malloc (sizeof (int));
DIAG_POP_NEEDS_COMMENT;
if (sigaction (SIGALRM, &action, NULL) != 0)
{
puts ("sigaction failed");
return 1;
}
/* Create a child that sends the signal to be caught. */
pid_t child = fork ();
if (child == 0)
{
if (kill (parent, SIGALRM) == -1)
perror ("kill");
exit (0);
}
TEMP_FAILURE_RETRY (waitpid (child, NULL, 0));
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"