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5d620373 | 1 | |
2 | /* | |
62ee09ca | 3 | * $Id: LeakFinder.cc,v 1.4 2006/05/29 00:15:00 robertc Exp $ |
5d620373 | 4 | * |
5 | * DEBUG: section 45 Callback Data Registry | |
6 | * AUTHOR: Duane Wessels | |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
5d620373 | 9 | * ---------------------------------------------------------- |
10 | * | |
2b6662ba | 11 | * Squid is the result of efforts by numerous individuals from |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
5d620373 | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
33 | * | |
34 | */ | |
35 | ||
36 | /* | |
37 | * Use these to find memory leaks | |
38 | */ | |
39 | ||
40 | #include "squid.h" | |
ba126bee | 41 | #include "LeakFinder.h" |
e6ccf245 | 42 | #include "Store.h" |
a4452e04 | 43 | #include "SquidTime.h" |
5d620373 | 44 | |
68488b4a | 45 | #if USE_LEAKFINDER |
ba126bee | 46 | /* ========================================================================= */ |
5d620373 | 47 | |
ba126bee | 48 | LeakFinderPtr::LeakFinderPtr(void *p , const char *f, const int l) : |
49 | file(f), line(l), when(squid_curtime) | |
62e76326 | 50 | { |
ba126bee | 51 | key = p; |
52 | next = NULL; | |
62e76326 | 53 | } |
54 | ||
5d620373 | 55 | /* ========================================================================= */ |
56 | ||
ba126bee | 57 | LeakFinder::LeakFinder() |
5d620373 | 58 | { |
ba126bee | 59 | debug(45, 3) ("LeakFinder constructed\n"); |
60 | table = hash_create(cmp, 1 << 8, hash); | |
61 | #if 0 | |
62ee09ca | 62 | /* if this is desired to reinstate, add a |
63 | * RegisterWithCacheManager method | |
64 | */ | |
5d620373 | 65 | cachemgrRegister("leaks", |
62e76326 | 66 | "Memory Leak Tracking", |
ba126bee | 67 | cachemgr_dump, 0, 1); |
68 | #endif | |
5d620373 | 69 | } |
70 | ||
71 | void * | |
ba126bee | 72 | |
73 | LeakFinder::add | |
74 | (void *p, const char *file, int line) | |
5d620373 | 75 | { |
ba126bee | 76 | assert(hash_lookup(table, p) == NULL); |
77 | LeakFinderPtr *c = new LeakFinderPtr(p, file, line); | |
78 | hash_join(table, c); | |
79 | count++; | |
5d620373 | 80 | return p; |
81 | } | |
82 | ||
83 | void * | |
ba126bee | 84 | LeakFinder::touch(void *p, const char *file, int line) |
5d620373 | 85 | { |
5d620373 | 86 | assert(p); |
ba126bee | 87 | LeakFinderPtr *c = (LeakFinderPtr *) hash_lookup(table, p); |
5d620373 | 88 | assert(c); |
89 | c->file = file; | |
90 | c->line = line; | |
91 | c->when = squid_curtime; | |
92 | return p; | |
93 | } | |
94 | ||
95 | void * | |
ba126bee | 96 | LeakFinder::free(void *p, const char *file, int line) |
5d620373 | 97 | { |
5d620373 | 98 | assert(p); |
ba126bee | 99 | LeakFinderPtr *c = (LeakFinderPtr *) hash_lookup(table, p); |
100 | assert(c); | |
101 | hash_remove_link(table, c); | |
102 | count--; | |
103 | delete c; | |
104 | dump(); | |
5d620373 | 105 | return p; |
106 | } | |
107 | ||
108 | /* ========================================================================= */ | |
109 | ||
ba126bee | 110 | int |
111 | LeakFinder::cmp(const void *p1, const void *p2) | |
5d620373 | 112 | { |
113 | return (char *) p1 - (char *) p2; | |
114 | } | |
115 | ||
ba126bee | 116 | unsigned int |
117 | LeakFinder::hash(const void *p, unsigned int mod) | |
5d620373 | 118 | { |
119 | return ((unsigned long) p >> 8) % mod; | |
120 | } | |
121 | ||
122 | ||
ba126bee | 123 | void |
124 | LeakFinder::dump() | |
5d620373 | 125 | { |
ba126bee | 126 | if (0 == count) |
127 | return; | |
128 | ||
129 | if (squid_curtime == last_dump) | |
130 | return; | |
131 | ||
132 | last_dump = squid_curtime; | |
133 | ||
134 | debug(45,1)("Tracking %d pointers\n", count); | |
135 | ||
136 | hash_first(table); | |
137 | ||
138 | LeakFinderPtr *c; | |
139 | ||
140 | while ((c = (LeakFinderPtr *)hash_next(table))) { | |
141 | debug(45,1)("%20p last used %9d seconds ago by %s:%d\n", | |
142 | c->key, (int)(squid_curtime - c->when), c->file, c->line); | |
5d620373 | 143 | } |
144 | } | |
68488b4a | 145 | |
146 | #endif /* USE_LEAKFINDER */ |