1/*
2 * Copyright (C) 2016 Igalia S.L.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include <wtf/linux/CurrentProcessMemoryStatus.h>
28
29#include <stdio.h>
30#include <stdlib.h>
31#include <unistd.h>
32
33namespace WTF {
34
35static inline size_t systemPageSize()
36{
37 static size_t pageSize = 0;
38 if (!pageSize)
39 pageSize = sysconf(_SC_PAGE_SIZE);
40 return pageSize;
41}
42
43void currentProcessMemoryStatus(ProcessMemoryStatus& memoryStatus)
44{
45 FILE* file = fopen("/proc/self/statm", "r");
46 if (!file)
47 return;
48
49 char buffer[128];
50 char* line = fgets(buffer, 128, file);
51 fclose(file);
52 if (!line)
53 return;
54
55 size_t pageSize = systemPageSize();
56 char* end = nullptr;
57 unsigned long long intValue = strtoull(line, &end, 10);
58 memoryStatus.size = intValue * pageSize;
59 intValue = strtoull(end, &end, 10);
60 memoryStatus.resident = intValue * pageSize;
61 intValue = strtoull(end, &end, 10);
62 memoryStatus.shared = intValue * pageSize;
63 intValue = strtoull(end, &end, 10);
64 memoryStatus.text = intValue * pageSize;
65 intValue = strtoull(end, &end, 10);
66 memoryStatus.lib = intValue * pageSize;
67 intValue = strtoull(end, &end, 10);
68 memoryStatus.data = intValue * pageSize;
69 intValue = strtoull(end, &end, 10);
70 memoryStatus.dt = intValue * pageSize;
71}
72
73} // namespace WTF
74