| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include "private/bionic_name_mem.h" |
| |
| /* |
| * Local definitions of custom prctl arguments to set a vma name in some kernels |
| */ |
| #define BIONIC_PR_SET_VMA 0x53564d41 |
| #define BIONIC_PR_SET_VMA_ANON_NAME 0 |
| |
| /* |
| * Names a region of memory. The name is expected to show up in /proc/pid/maps |
| * and /proc/pid/smaps. There is no guarantee that it will work, and it if it |
| * does work it is likely to only work on memory that was allocated with |
| * mmap(MAP_ANONYMOUS), and only on regions that are page aligned. name should |
| * be a pointer to a string that is valid for as long as the memory is mapped, |
| * preferably a compile-time constant string. |
| * |
| * Returns -1 on error and sets errno. If it returns an error naming page |
| * aligned anonymous memory the kernel doesn't support naming, and an alternate |
| * method of naming memory should be used (like ashmem). |
| */ |
| int __bionic_name_mem(void *addr, size_t len, const char *name) |
| { |
| return prctl(BIONIC_PR_SET_VMA, BIONIC_PR_SET_VMA_ANON_NAME, |
| addr, len, name); |
| } |