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
|
/* tinyproxy - A fast light-weight HTTP proxy
* Copyright (C) 2002 Robert James Kaes <rjkaes@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* Debugging versions of various heap related functions are combined
* here. The debugging versions include assertions and also print
* (to standard error) the function called along with the amount
* of memory allocated, and where the memory is pointing. The
* format of the log message is standardized.
*/
#include "tinyproxy.h"
#include "heap.h"
#include "text.h"
void *
debugging_calloc (size_t nmemb, size_t size, const char *file,
unsigned long line)
{
void *ptr;
assert (nmemb > 0);
assert (size > 0);
ptr = calloc (nmemb, size);
fprintf (stderr, "{calloc: %p:%zu x %zu} %s:%lu\n", ptr, nmemb, size, file,
line);
return ptr;
}
void *
debugging_malloc (size_t size, const char *file, unsigned long line)
{
void *ptr;
assert (size > 0);
ptr = malloc (size);
fprintf (stderr, "{malloc: %p:%zu} %s:%lu\n", ptr, size, file, line);
return ptr;
}
void *
debugging_realloc (void *ptr, size_t size, const char *file,
unsigned long line)
{
void *newptr;
assert (size > 0);
newptr = realloc (ptr, size);
fprintf (stderr, "{realloc: %p -> %p:%zu} %s:%lu\n", ptr, newptr, size,
file, line);
return newptr;
}
void
debugging_free (void *ptr, const char *file, unsigned long line)
{
fprintf (stderr, "{free: %p} %s:%lu\n", ptr, file, line);
if (ptr != NULL)
free (ptr);
return;
}
char *
debugging_strdup (const char *s, const char *file, unsigned long line)
{
char *ptr;
size_t len;
assert (s != NULL);
len = strlen (s) + 1;
ptr = malloc (len);
if (!ptr)
return NULL;
memcpy (ptr, s, len);
fprintf (stderr, "{strdup: %p:%zu} %s:%lu\n", ptr, len, file, line);
return ptr;
}
/*
* Allocate a block of memory in the "shared" memory region.
*
* FIXME: This uses the most basic (and slowest) means of creating a
* shared memory location. It requires the use of a temporary file. We might
* want to look into something like MM (Shared Memory Library) for a better
* solution.
*/
void *
malloc_shared_memory (size_t size)
{
int fd;
void *ptr;
char buffer[32];
static char *shared_file = "/tmp/tinyproxy.shared.XXXXXX";
assert (size > 0);
strlcpy (buffer, shared_file, sizeof (buffer));
/* Only allow u+rw bits. This may be required for some versions
* of glibc so that mkstemp() doesn't make us vulnerable.
*/
umask (0177);
if ((fd = mkstemp (buffer)) == -1)
return MAP_FAILED;
unlink (buffer);
if (ftruncate (fd, size) == -1)
return MAP_FAILED;
ptr = mmap (NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
return ptr;
}
/*
* Allocate a block of memory from the "shared" region an initialize it to
* zero.
*/
void *
calloc_shared_memory (size_t nmemb, size_t size)
{
void *ptr;
long length;
assert (nmemb > 0);
assert (size > 0);
length = nmemb * size;
ptr = malloc_shared_memory (length);
if (ptr == MAP_FAILED)
return ptr;
memset (ptr, 0, length);
return ptr;
}
|
