1 /*
2 * Copyright (C) 2018 Oracle.
3 * Copyright 2019 Joyent, Inc.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
17 */
18
19 #include "smatch.h"
20 #include <fcntl.h>
21 #include <unistd.h>
22 #ifdef __sun
23 #include <sys/procfs.h>
24 #endif
25
26 static int my_id;
27
28 static unsigned long max_size;
29
30 #ifdef __sun
get_mem_kb(void)31 unsigned long get_mem_kb(void)
32 {
33 static int my_fd = -2;
34 prpsinfo_t pbuf;
35
36 if (my_fd == -2) {
37 /* Do not repeatedly attempt this if it fails. */
38 my_fd = open("/proc/self/psinfo", O_RDONLY);
39 }
40 if (my_fd == -1) {
41 return (0);
42 }
43
44 if (pread(my_fd, &pbuf, sizeof (pbuf), 0) != sizeof (pbuf)) {
45 return (0);
46 }
47
48 return (pbuf.pr_rssize);
49 }
50 #else
get_mem_kb(void)51 unsigned long get_mem_kb(void)
52 {
53 FILE *file;
54 char buf[1024] = "0";
55 unsigned long size;
56
57 file = fopen("/proc/self/statm", "r");
58 if (!file)
59 return 0;
60 fread(buf, 1, sizeof(buf), file);
61 fclose(file);
62
63 size = strtoul(buf, NULL, 10);
64 size = size * sysconf(_SC_PAGESIZE) / 1024;
65 return size;
66 }
67 #endif
68
match_end_func(struct symbol * sym)69 static void match_end_func(struct symbol *sym)
70 {
71 unsigned long size;
72
73 if (option_mem) {
74 size = get_mem_kb();
75 if (size > max_size)
76 max_size = size;
77 }
78 }
79
get_max_memory(void)80 unsigned long get_max_memory(void)
81 {
82 return max_size;
83 }
84
register_mem_tracker(int id)85 void register_mem_tracker(int id)
86 {
87 my_id = id;
88
89 add_hook(&match_end_func, END_FUNC_HOOK);
90 }
91