1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "berberis/base/prctl_helpers.h"
18
19 #include <sys/prctl.h>
20
21 // These are not defined in our glibc, but are supported in kernel since 5.17 (but not necessarily
22 // enabled). It's always enabled in Android kernerls, but otherwise on Linux may be disabled
23 // depending on CONFIG_ANON_VMA_NAME boot config flag. So the caller needs to check the result to
24 // see if it actually worked.
25 #if !defined(PR_SET_VMA)
26 #define PR_SET_VMA 0x53564d41
27 #endif
28 #if !defined(PR_SET_VMA_ANON_NAME)
29 #define PR_SET_VMA_ANON_NAME 0
30 #endif
31
32 namespace berberis {
33
SetVmaAnonName(void * addr,size_t size,const char * name)34 int SetVmaAnonName(void* addr, size_t size, const char* name) {
35 return prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, addr, size, name);
36 }
37
38 } // namespace berberis
39