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15637ed4 RG |
1 | /* |
2 | * S T O R A G E . C | |
3 | * | |
4 | * Ray Tracing program, storage manager. | |
5 | * | |
6 | * Functions - | |
7 | * rt_malloc Allocate storage, with visibility & checking | |
8 | * rt_free Similarly, free storage | |
9 | * rt_prmem When debugging, print memory map | |
10 | * calloc, cfree Which call rt_malloc, rt_free | |
11 | * | |
12 | * Author - | |
13 | * Michael John Muuss | |
14 | * | |
15 | * Source - | |
16 | * SECAD/VLD Computing Consortium, Bldg 394 | |
17 | * The U. S. Army Ballistic Research Laboratory | |
18 | * Aberdeen Proving Ground, Maryland 21005-5066 | |
19 | * | |
20 | * Copyright Notice - | |
21 | * This software is Copyright (C) 1987 by the United States Army. | |
22 | * All rights reserved. | |
23 | */ | |
24 | #ifndef lint | |
25 | static char RCSstorage[] = "@(#)$Header: storage.c,v 1.1 87/06/06 07:58:06 dpk BRL $"; | |
26 | #endif | |
27 | ||
28 | #include <sys/param.h> | |
29 | #if BSD >= 43 | |
30 | #include <sys/syslog.h> | |
31 | #else | |
32 | #include <stdio.h> | |
33 | #define LOG_ERR 0 | |
34 | #endif BSD | |
35 | ||
36 | #undef malloc | |
37 | #undef free | |
38 | ||
39 | #define MDB_SIZE 20000 | |
40 | #define MDB_MAGIC 0x12348969 | |
41 | struct memdebug { | |
42 | char *mdb_addr; | |
43 | char *mdb_str; | |
44 | int mdb_len; | |
45 | } rt_mdb[MDB_SIZE]; | |
46 | ||
47 | /* | |
48 | * R T _ M A L L O C | |
49 | */ | |
50 | char * | |
51 | rt_malloc(cnt) | |
52 | unsigned int cnt; | |
53 | { | |
54 | register char *ptr; | |
55 | extern char *malloc(); | |
56 | ||
57 | cnt = (cnt+2*sizeof(int)-1)&(~(sizeof(int)-1)); | |
58 | ptr = malloc(cnt); | |
59 | ||
60 | if( ptr==(char *)0 ) { | |
61 | syslog(LOG_ERR, "rt_malloc: malloc failure"); | |
62 | abort(); | |
63 | } else { | |
64 | register struct memdebug *mp = rt_mdb; | |
65 | for( ; mp < &rt_mdb[MDB_SIZE]; mp++ ) { | |
66 | if( mp->mdb_len > 0 ) continue; | |
67 | mp->mdb_addr = ptr; | |
68 | mp->mdb_len = cnt; | |
69 | mp->mdb_str = "???"; | |
70 | goto ok; | |
71 | } | |
72 | syslog(LOG_ERR, "rt_malloc: memdebug overflow\n"); | |
73 | } | |
74 | ok: ; | |
75 | { | |
76 | register int *ip = (int *)(ptr+cnt-sizeof(int)); | |
77 | *ip = MDB_MAGIC; | |
78 | } | |
79 | return(ptr); | |
80 | } | |
81 | ||
82 | /* | |
83 | * R T _ F R E E | |
84 | */ | |
85 | void | |
86 | rt_free(ptr) | |
87 | char *ptr; | |
88 | { | |
89 | register struct memdebug *mp = rt_mdb; | |
90 | for( ; mp < &rt_mdb[MDB_SIZE]; mp++ ) { | |
91 | if( mp->mdb_len <= 0 ) continue; | |
92 | if( mp->mdb_addr != ptr ) continue; | |
93 | { | |
94 | register int *ip = (int *)(ptr+mp->mdb_len-sizeof(int)); | |
95 | if( *ip != MDB_MAGIC ) { | |
96 | syslog(LOG_ERR, "ERROR rt_free(x%x, %s) corrupted! x%x!=x%x\n", ptr, "???", *ip, MDB_MAGIC); | |
97 | abort(); | |
98 | } | |
99 | } | |
100 | mp->mdb_len = 0; /* successful free */ | |
101 | goto ok; | |
102 | } | |
103 | syslog(LOG_ERR, "ERROR rt_free(x%x, %s) bad pointer!\n", ptr, "???"); | |
104 | abort(); | |
105 | ok: ; | |
106 | ||
107 | *((int *)ptr) = -1; /* zappo! */ | |
108 | free(ptr); | |
109 | } | |
110 | ||
111 | /* | |
112 | * R T _ P R M E M | |
113 | * | |
114 | * Print map of memory currently in use. | |
115 | */ | |
116 | void | |
117 | rt_prmem(str) | |
118 | char *str; | |
119 | { | |
120 | register struct memdebug *mp = rt_mdb; | |
121 | register int *ip; | |
122 | ||
123 | printf("\nRT memory use\t\t%s\n", str); | |
124 | for( ; mp < &rt_mdb[MDB_SIZE]; mp++ ) { | |
125 | if( mp->mdb_len <= 0 ) continue; | |
126 | ip = (int *)(mp->mdb_addr+mp->mdb_len-sizeof(int)); | |
127 | printf("%7x %5x %s %s\n", | |
128 | mp->mdb_addr, mp->mdb_len, mp->mdb_str, | |
129 | *ip!=MDB_MAGIC ? "-BAD-" : "" ); | |
130 | if( *ip != MDB_MAGIC ) | |
131 | printf("\t%x\t%x\n", *ip, MDB_MAGIC); | |
132 | } | |
133 | } | |
134 | ||
135 | char * | |
136 | calloc(num, size) | |
137 | register unsigned num, size; | |
138 | { | |
139 | extern char *malloc(); | |
140 | register char *p; | |
141 | ||
142 | size *= num; | |
143 | if (p = rt_malloc(size)) | |
144 | bzero(p, size); | |
145 | return (p); | |
146 | } | |
147 | ||
148 | cfree(p, num, size) | |
149 | char *p; | |
150 | unsigned num; | |
151 | unsigned size; | |
152 | { | |
153 | rt_free(p); | |
154 | } | |
155 | ||
156 | #if BSD < 43 | |
157 | openlog() {} | |
158 | ||
159 | syslog(x, str, a, b, c, d, e, f) | |
160 | int x; | |
161 | char *str; | |
162 | int a, b, c, d, e, f; | |
163 | { | |
164 | fprintf(stderr, str, a, b, c, d, e, f); | |
165 | } | |
166 | #endif BSD |