1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* gmem.c
*
* Memory routines with out-of-memory checking.
*
* Copyright 1996-2002 Glyph & Cog, LLC
*/
#include "aconf.h"
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include "gmem.h"
#ifdef DEBUG_MEM
typedef struct _GMemHdr {
int size;
int index;
struct _GMemHdr *next;
} GMemHdr;
#define gMemHdrSize ((sizeof(GMemHdr) + 7) & ~7)
#define gMemTrlSize (sizeof(long))
#if gmemTrlSize==8
#define gMemDeadVal 0xdeadbeefdeadbeefUL
#else
#define gMemDeadVal 0xdeadbeefUL
#endif
/* round data size so trailer will be aligned */
#define gMemDataSize(size) \
((((size) + gMemTrlSize - 1) / gMemTrlSize) * gMemTrlSize)
#define gMemNLists 64
#define gMemListShift 4
#define gMemListMask (gMemNLists - 1)
static GMemHdr *gMemList[gMemNLists] = {
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
};
static int gMemIndex = 0;
static int gMemAlloc = 0;
#endif /* DEBUG_MEM */
void *gmalloc(int size) {
#ifdef DEBUG_MEM
int size1;
char *mem;
GMemHdr *hdr;
void *data;
int lst;
unsigned long *trl, *p;
if (size == 0)
return NULL;
size1 = gMemDataSize(size);
if (!(mem = (char *)malloc(size1 + gMemHdrSize + gMemTrlSize))) {
fprintf(stderr, "Out of memory\n");
exit(1);
}
hdr = (GMemHdr *)mem;
data = (void *)(mem + gMemHdrSize);
trl = (unsigned long *)(mem + gMemHdrSize + size1);
hdr->size = size;
hdr->index = gMemIndex++;
lst = ((int)hdr >> gMemListShift) & gMemListMask;
hdr->next = gMemList[lst];
gMemList[lst] = hdr;
++gMemAlloc;
for (p = (unsigned long *)data; p <= trl; ++p)
*p = gMemDeadVal;
return data;
#else
void *p;
if (size == 0)
return NULL;
if (!(p = malloc(size))) {
fprintf(stderr, "Out of memory\n");
exit(1);
}
return p;
#endif
}
void *grealloc(void *p, int size) {
#ifdef DEBUG_MEM
GMemHdr *hdr;
void *q;
int oldSize;
if (size == 0) {
if (p)
gfree(p);
return NULL;
}
if (p) {
hdr = (GMemHdr *)((char *)p - gMemHdrSize);
oldSize = hdr->size;
q = gmalloc(size);
memcpy(q, p, size < oldSize ? size : oldSize);
gfree(p);
} else {
q = gmalloc(size);
}
return q;
#else
void *q;
if (size == 0) {
if (p)
free(p);
return NULL;
}
if (p)
q = realloc(p, size);
else
q = malloc(size);
if (!q) {
fprintf(stderr, "Out of memory\n");
exit(1);
}
return q;
#endif
}
void gfree(void *p) {
#ifdef DEBUG_MEM
int size;
GMemHdr *hdr;
GMemHdr *prevHdr, *q;
int lst;
unsigned long *trl, *clr;
if (p) {
hdr = (GMemHdr *)((char *)p - gMemHdrSize);
lst = ((int)hdr >> gMemListShift) & gMemListMask;
for (prevHdr = NULL, q = gMemList[lst]; q; prevHdr = q, q = q->next) {
if (q == hdr)
break;
}
if (q) {
if (prevHdr)
prevHdr->next = hdr->next;
else
gMemList[lst] = hdr->next;
--gMemAlloc;
size = gMemDataSize(hdr->size);
trl = (unsigned long *)((char *)hdr + gMemHdrSize + size);
if (*trl != gMemDeadVal) {
fprintf(stderr, "Overwrite past end of block %d at address %p\n",
hdr->index, p);
}
for (clr = (unsigned long *)hdr; clr <= trl; ++clr)
*clr = gMemDeadVal;
free(hdr);
} else {
fprintf(stderr, "Attempted to free bad address %p\n", p);
}
}
#else
if (p)
free(p);
#endif
}
#ifdef DEBUG_MEM
void gMemReport(FILE *f) {
GMemHdr *p;
int lst;
fprintf(f, "%d memory allocations in all\n", gMemIndex);
if (gMemAlloc > 0) {
fprintf(f, "%d memory blocks left allocated:\n", gMemAlloc);
fprintf(f, " index size\n");
fprintf(f, "-------- --------\n");
for (lst = 0; lst < gMemNLists; ++lst) {
for (p = gMemList[lst]; p; p = p->next)
fprintf(f, "%8d %8d\n", p->index, p->size);
}
} else {
fprintf(f, "No memory blocks left allocated\n");
}
}
#endif
char *copyString(char *s) {
char *s1;
s1 = (char *)gmalloc(strlen(s) + 1);
strcpy(s1, s);
return s1;
}
|
