1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * 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 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 */
30
31#include <unistd.h>
32
33#ifdef __APPLE__
34#include <mach/mach_init.h>
35#include <mach/shared_region.h>
36#include <mach/task.h>
37
38#endif
39
40#include "base/hostinfo.hh"
41
42#include <cctype>
43#include <cerrno>
44#include <cmath>
45#include <cstdio>
46#include <cstdlib>
47#include <cstring>
48#include <string>
49
50#include "base/logging.hh"
51#include "base/str.hh"
52#include "base/types.hh"
53
54using namespace std;
55
56string
57__get_hostname()
58{
59    char host[256];
60    if (gethostname(host, sizeof host) == -1)
61        warn("could not get host name!");
62    return host;
63}
64
65string &
66hostname()
67{
68    static string hostname = __get_hostname();
69    return hostname;
70}
71
72uint64_t
73procInfo(const char *filename, const char *target)
74{
75    int  done = 0;
76    char line[80];
77    char format[80];
78    long usage;
79
80    FILE *fp = fopen(filename, "r");
81
82    while (fp && !feof(fp) && !done) {
83        if (fgets(line, 80, fp)) {
84            if (startswith(line, target)) {
85                snprintf(format, sizeof(format), "%s %%ld", target);
86                sscanf(line, format, &usage);
87
88                fclose(fp);
89                return usage ;
90            }
91        }
92    }
93
94    if (fp)
95        fclose(fp);
96
97    return 0;
98}
99
100uint64_t
101memUsage()
102{
103// For the Mach-based Darwin kernel, use the task_info of the self task
104#ifdef __APPLE__
105    struct task_basic_info t_info;
106    mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
107
108    if (KERN_SUCCESS != task_info(mach_task_self(),
109                                  TASK_BASIC_INFO, (task_info_t)&t_info,
110                                  &t_info_count)) {
111        return 0;
112    }
113
114    // Mimic Darwin's implementation of top and subtract
115    // SHARED_REGION_SIZE from the tasks virtual size to account for the
116    // shared memory submap that is incorporated into every process.
117    return (t_info.virtual_size - SHARED_REGION_SIZE) / 1024;
118#else
119    // Linux implementation
120    return procInfo("/proc/self/status", "VmSize:");
121#endif
122}
123