hostinfo.cc revision 9554:406fbcf60223 
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#endif
38
39#include <cctype>
40#include <cerrno>
41#include <cmath>
42#include <cstdio>
43#include <cstdlib>
44#include <cstring>
45#include <string>
46
47#include "base/hostinfo.hh"
48#include "base/misc.hh"
49#include "base/str.hh"
50#include "base/types.hh"
51
52using namespace std;
53
54string
55__get_hostname()
56{
57    char host[256];
58    if (gethostname(host, sizeof host) == -1)
59        warn("could not get host name!");
60    return host;
61}
62
63string &
64hostname()
65{
66    static string hostname = __get_hostname();
67    return hostname;
68}
69
70uint64_t
71procInfo(const char *filename, const char *target)
72{
73    int  done = 0;
74    char line[80];
75    char format[80];
76    long usage;
77
78    FILE *fp = fopen(filename, "r");
79
80    while (fp && !feof(fp) && !done) {
81        if (fgets(line, 80, fp)) {
82            if (startswith(line, target)) {
83                snprintf(format, sizeof(format), "%s %%ld", target);
84                sscanf(line, format, &usage);
85
86                fclose(fp);
87                return usage ;
88            }
89        }
90    }
91
92    if (fp)
93        fclose(fp);
94
95    return 0;
96}
97
98uint64_t
99memUsage()
100{
101// For the Mach-based Darwin kernel, use the task_info of the self task
102#ifdef __APPLE__
103    struct task_basic_info t_info;
104    mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
105
106    if (KERN_SUCCESS != task_info(mach_task_self(),
107                                  TASK_BASIC_INFO, (task_info_t)&t_info,
108                                  &t_info_count)) {
109        return 0;
110    }
111
112    // Mimic Darwin's implementation of top and subtract
113    // SHARED_REGION_SIZE from the tasks virtual size to account for the
114    // shared memory submap that is incorporated into every process.
115    return (t_info.virtual_size - SHARED_REGION_SIZE) / 1024;
116#else
117    // Linux implementation
118    return procInfo("/proc/self/status", "VmSize:");
119#endif
120}
121