1 /**************************************************************************
2 *
3 * Copyright (C) 2018 Chromium.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 **************************************************************************/
24
25 #include "util.h"
26 #include "vtest_shm.h"
27
28 #include <stdlib.h>
29 #include <stdio.h>
30 #include <errno.h>
31 #include <fcntl.h>
32
33 #include <sys/syscall.h>
34 #include <unistd.h>
35
memfd_create(const char * name,unsigned int flags)36 static int memfd_create(const char *name, unsigned int flags)
37 {
38 #ifdef __NR_memfd_create
39 return syscall(__NR_memfd_create, name, flags);
40 #else
41 (void)name;
42 (void)flags;
43 return -1;
44 #endif
45 }
46
vtest_new_shm(uint32_t handle,size_t size)47 int vtest_new_shm(uint32_t handle, size_t size)
48 {
49 int fd, ret;
50 int length = snprintf(NULL, 0, "vtest-res-%u", handle);
51 char *str = malloc(length + 1);
52 snprintf(str, length + 1, "vtest-res-%u", handle);
53
54 fd = memfd_create(str, MFD_ALLOW_SEALING);
55 free(str);
56 if (fd < 0) {
57 return report_failed_call("memfd_create", -errno);
58 }
59
60 ret = ftruncate(fd, size);
61 if (ret < 0) {
62 close(fd);
63 return report_failed_call("ftruncate", -errno);
64 }
65
66 return fd;
67 }
68
vtest_shm_check(void)69 int vtest_shm_check(void)
70 {
71 int mfd = memfd_create("test", MFD_ALLOW_SEALING);
72
73 if (mfd >= 0) {
74 close(mfd);
75 return 1;
76 }
77
78 return 0;
79 }
80
81