epan/app_mem_usage.c

   1 /*
   2  * app_mem_usage.c
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #if defined(__linux__)
  26  #define _XOPEN_SOURCE 500
  27 #endif
  28
  29 #include "config.h"
  30
  31 #include <stdio.h>
  32
  33 #include <glib.h>
  34
  35 #ifdef _WIN32
  36 #include <windows.h>
  37 #include <psapi.h>
  38 #endif /*  _WIN32 */
  39
  40 #if defined(__linux__)
  41 # include <sys/types.h>
  42 # include <sys/stat.h>
  43 # include <unistd.h>
  44 # include <fcntl.h>
  45 #endif
  46
  47 #include "app_mem_usage.h"
  48
  49 #define MAX_COMPONENTS 16
  50
  51 #if defined(_WIN32)
  52 static gsize
  53 win32_get_total_mem_used_by_app(void)
  54 {
  55    HANDLE pHandle;
  56    PROCESS_MEMORY_COUNTERS pmc;
  57    SIZE_T workingSize = 0;
  58
  59    pHandle = GetCurrentProcess();
  60
  61    if (GetProcessMemoryInfo(pHandle, &pmc, sizeof(pmc))){
  62       workingSize = pmc.WorkingSetSize;
  63     }
  64
  65     CloseHandle(pHandle);
  66
  67         if(workingSize == 0){
  68                 return -1;
  69         }else{
  70                 return (int)workingSize;
  71         }
  72 }
  73
  74 #define get_total_mem_used_by_app win32_get_total_mem_used_by_app
  75
  76 #endif /* (_WIN32) */
  77
  78 #if defined(__linux__)
  79
  80 static gboolean
  81 linux_get_memory(gsize *ptotal, gsize *prss)
  82 {
  83         static int fd = -1;
  84         static intptr_t pagesize = 0;
  85
  86         char buf[128];
  87         unsigned long total, rss;
  88         ssize_t ret;
  89
  90         if (!pagesize)
  91                 pagesize = sysconf(_SC_PAGESIZE);
  92
  93         if (pagesize == -1)
  94                 return FALSE;
  95
  96         if (fd < 0) {
  97                 char path[64];
  98
  99                 g_snprintf(path, sizeof(path), "/proc/%d/statm", getpid());
 100
 101                 fd = open(path, O_RDONLY);
 102
 103                 /* XXX, fallback to some other /proc file ? */
 104         }
 105
 106         if (fd < 0)
 107                 return FALSE;
 108
 109         ret = pread(fd, buf, sizeof(buf)-1, 0);
 110         if (ret <= 0)
 111                 return FALSE;
 112
 113         buf[ret] = '\0';
 114
 115         if (sscanf(buf, "%lu %lu", &total, &rss) != 2)
 116                 return FALSE;
 117
 118         if (ptotal)
 119                 *ptotal = pagesize * (gsize) total;
 120         if (prss)
 121                 *prss = pagesize * (gsize) rss;
 122
 123         return TRUE;
 124 }
 125
 126 static gsize
 127 linux_get_total_mem_used_by_app(void)
 128 {
 129         gsize total;
 130
 131         if (!linux_get_memory(&total, NULL))
 132                 total = 0;
 133
 134         return total;
 135 }
 136
 137 static gsize
 138 linux_get_rss_mem_used_by_app(void)
 139 {
 140         gsize rss;
 141
 142         if (!linux_get_memory(NULL, &rss))
 143                 rss = 0;
 144
 145         return rss;
 146 }
 147
 148 #define get_total_mem_used_by_app linux_get_total_mem_used_by_app
 149
 150 #define get_rss_mem_used_by_app linux_get_rss_mem_used_by_app
 151
 152 #endif
 153
 154 /* XXX, BSD 4.3: getrusage() -> ru_ixrss ? */
 155
 156 #ifdef get_total_mem_used_by_app
 157 static const ws_mem_usage_t total_usage = { "Total", get_total_mem_used_by_app, NULL };
 158 #endif
 159
 160 #ifdef get_rss_mem_used_by_app
 161 static const ws_mem_usage_t rss_usage = { "RSS", get_rss_mem_used_by_app, NULL };
 162 #endif
 163
 164 static const ws_mem_usage_t *memory_components[MAX_COMPONENTS] = {
 165 #ifdef get_total_mem_used_by_app
 166         &total_usage,
 167 #endif
 168 #ifdef get_rss_mem_used_by_app
 169         &rss_usage,
 170 #endif
 171 };
 172
 173 static guint memory_register_num = 0
 174 #ifdef get_total_mem_used_by_app
 175         + 1
 176 #endif
 177 #ifdef get_rss_mem_used_by_app
 178         + 1
 179 #endif
 180         ;
 181
 182 /* public API */
 183
 184 void
 185 memory_usage_component_register(const ws_mem_usage_t *component)
 186 {
 187         if (memory_register_num >= MAX_COMPONENTS)
 188                 return;
 189
 190         memory_components[memory_register_num++] = component;
 191 }
 192
 193 const char *
 194 memory_usage_get(guint index, gsize *value)
 195 {
 196         if (index >= memory_register_num)
 197                 return NULL;
 198
 199         if (value)
 200                 *value = memory_components[index]->fetch();
 201
 202         return memory_components[index]->name;
 203 }
 204
 205 void
 206 memory_usage_gc(void)
 207 {
 208         guint i;
 209
 210         for (i = 0; i < memory_register_num; i++) {
 211                 if (memory_components[i]->gc)
 212                         memory_components[i]->gc();
 213         }
 214 }
 215