hostinfo.cc revision 8655 
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/misc.hh"
48#include "base/types.hh"
49
50using namespace std;
51
52string
53__get_hostname()
54{
55    char host[256];
56    if (gethostname(host, sizeof host) == -1)
57        warn("could not get host name!");
58    return host;
59}
60
61string &
62hostname()
63{
64    static string hostname = __get_hostname();
65    return hostname;
66}
67
68uint64_t
69procInfo(const char *filename, const char *target)
70{
71    int  done = 0;
72    char line[80];
73    char format[80];
74    long usage;
75
76    FILE *fp = fopen(filename, "r");
77
78    while (fp && !feof(fp) && !done) {
79        if (fgets(line, 80, fp)) {
80            if (strncmp(line, target, strlen(target)) == 0) {
81                snprintf(format, sizeof(format), "%s %%ld", target);
82                sscanf(line, format, &usage);
83
84                fclose(fp);
85                return usage ;
86            }
87        }
88    }
89
90    if (fp)
91        fclose(fp);
92
93    return 0;
94}
95
96uint64_t
97memUsage()
98{
99// For the Mach-based Darwin kernel, use the task_info of the self task
100#ifdef __APPLE__
101    struct task_basic_info t_info;
102    mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
103
104    if (KERN_SUCCESS != task_info(mach_task_self(),
105                                  TASK_BASIC_INFO, (task_info_t)&t_info,
106                                  &t_info_count)) {
107        return 0;
108    }
109
110    // Mimic Darwin's implementation of top and subtract
111    // SHARED_REGION_SIZE from the tasks virtual size to account for the
112    // shared memory submap that is incorporated into every process.
113    return (t_info.virtual_size - SHARED_REGION_SIZE) / 1024;
114#else
115    // Linux implementation
116    return procInfo("/proc/self/status", "VmSize:");
117#endif
118}
119