1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include <errno.h>
17 #include <unistd.h>
18 #include "test.h"
19
get_brk()20 void *get_brk()
21 {
22 return sbrk(0);
23 }
24
25 /**
26 * @tc.name : brk_0100
27 * @tc.desc : Verify Change the location of program breakpoints
28 * @tc.level : Level 0
29 */
brk_0100(void)30 void brk_0100(void)
31 {
32 errno = 0;
33 void *initial_break = get_brk();
34 void *new_break = (void *)((uintptr_t)(initial_break) + 1);
35
36 int result = brk(new_break);
37 if (result == -1) {
38 if (errno != ENOMEM) {
39 t_error("%s errno should be ENOMEM\n", __func__);
40 }
41 } else {
42 if (result != 0) {
43 t_error("%s brk failed\n", __func__);
44 }
45 if (get_brk() < new_break) {
46 t_error("%s brk invalid\n", __func__);
47 }
48 }
49 }
50
main(int argc,char * argv[])51 int main(int argc, char *argv[])
52 {
53 brk_0100();
54 return t_status;
55 }