1 /* 2 * Copyright (C) 2018 Oracle. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 2 7 * of the License, or (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt 16 */ 17 18 #include "smatch.h" 19 #include <unistd.h> 20 21 static int my_id; 22 23 static unsigned long max_size; 24 25 unsigned long get_mem_kb(void) 26 { 27 FILE *file; 28 char buf[1024]; 29 unsigned long size; 30 31 file = fopen("/proc/self/statm", "r"); 32 if (!file) 33 return 0; 34 fread(buf, 1, sizeof(buf), file); 35 fclose(file); 36 37 size = strtoul(buf, NULL, 10); 38 size = size * sysconf(_SC_PAGESIZE) / 1024; 39 return size; 40 } 41 42 static void match_end_func(struct symbol *sym) 43 { 44 unsigned long size; 45 46 if (option_mem) { 47 size = get_mem_kb(); 48 if (size > max_size) 49 max_size = size; 50 } 51 } 52 53 unsigned long get_max_memory(void) 54 { 55 return max_size; 56 } 57 58 void register_mem_tracker(int id) 59 { 60 my_id = id; 61 62 add_hook(&match_end_func, END_FUNC_HOOK); 63 } 64