path: root/tools/testing/selftests/nolibc/nolibc-test.c

/* SPDX-License-Identifier: GPL-2.0 */

#define _GNU_SOURCE
#define _LARGEFILE64_SOURCE

/* libc-specific include files
 * The program may be built in 3 ways:
 *   $(CC) -nostdlib -include /path/to/nolibc.h => NOLIBC already defined
 *   $(CC) -nostdlib -I/path/to/nolibc/sysroot  => _NOLIBC_* guards are present
 *   $(CC) with default libc                    => NOLIBC* never defined
 */
#ifndef NOLIBC
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef _NOLIBC_STDIO_H
/* standard libcs need more includes */
#include <sys/auxv.h>
#include <sys/io.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/reboot.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysmacros.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <unistd.h>
#include <limits.h>
#endif
#endif

#include "nolibc-test-linkage.h"

/* for the type of int_fast16_t and int_fast32_t, musl differs from glibc and nolibc */
#define SINT_MAX_OF_TYPE(type) (((type)1 << (sizeof(type) * 8 - 2)) - (type)1 + ((type)1 << (sizeof(type) * 8 - 2)))
#define SINT_MIN_OF_TYPE(type) (-SINT_MAX_OF_TYPE(type) - 1)

/* will be used to test initialization of environ */
static char **test_envp;

/* will be used to test initialization of argv */
static char **test_argv;

/* will be used to test initialization of argc */
static int test_argc;

/* will be used by some test cases as readable file, please don't write it */
static const char *argv0;

/* will be used by constructor tests */
static int constructor_test_value;

/* definition of a series of tests */
struct test {
	const char *name;              /* test name */
	int (*func)(int min, int max); /* handler */
};

#ifndef _NOLIBC_STDLIB_H
char *itoa(int i)
{<