58 lines
1011 B
C
58 lines
1011 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
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*/
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#include <unistd.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <errno.h>
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#include "tst_test.h"
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void verify_brk(void)
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{
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uintptr_t cur_brk, new_brk;
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uintptr_t inc = getpagesize() * 2 - 1;
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unsigned int i;
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cur_brk = (uintptr_t)sbrk(0);
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for (i = 0; i < 33; i++) {
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switch (i % 3) {
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case 0:
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new_brk = cur_brk + inc;
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break;
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case 1:
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new_brk = cur_brk;
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break;
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case 2:
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new_brk = cur_brk - inc;
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break;
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}
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TST_EXP_PASS_SILENT(brk((void *)new_brk), "brk()");
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if (!TST_PASS)
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return;
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cur_brk = (uintptr_t)sbrk(0);
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if (cur_brk != new_brk) {
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tst_res(TFAIL,
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"brk() failed to set address have %p expected %p",
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(void *)cur_brk, (void *)new_brk);
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return;
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}
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/* Try to write to the newly allocated heap */
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if (i % 3 == 0)
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*((char *)cur_brk) = 0;
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}
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tst_res(TPASS, "brk() works fine");
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}
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static struct tst_test test = {
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.test_all = verify_brk,
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};
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