/*      $OpenBSD: malloc_errno.c,v 1.5 2019/06/11 22:16:13 bluhm Exp $  */
/*
 * Public domain.  2003, Otto Moerbeek
 */
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>

/* On arm64 with 2G of memory this test hangs while junking. */
char *malloc_options = "jj";

static void
testerrno(size_t sz)
{
        void *p;

        errno = -1;
        p = malloc(sz);

        if (p == NULL && errno != ENOMEM)
                errx(1, "fail: %lx %p %d", (unsigned long)sz, p, errno);

        /* if alloc succeeded, test if errno did not change */
        if (p != NULL && errno != -1)
                errx(1, "fail: %lx %p %d", (unsigned long)sz, p, errno);

        free(p);
}

/*
 * Provide some (silly) arguments to malloc(), and check if ERRNO is set
 * correctly.
 */
int
main(int argc, char *argv[])
{
        size_t i;

        testerrno(1);
        testerrno(100000);
        testerrno(-1);
        testerrno(-1000);
        testerrno(-10000);
        testerrno(-10000000);
        for (i = 0; i < 0x10; i++)
                testerrno(i * 0x10000000);
        return 0;
}