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1ab3bf1b JG |
1 | /* GDB support for special malloc using mmap. |
2 | Copyright 1992 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support, using pieces from other GDB modules. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | #include <stdio.h> | |
22 | #include "defs.h" | |
23 | ||
24 | #if defined (HAVE_MMAP) | |
25 | ||
26 | /* Redefine the external visible symbols in gmalloc.c to be mmap versions */ | |
27 | ||
28 | #define free _mmap_free | |
29 | #define malloc _mmap_malloc | |
30 | #define realloc _mmap_realloc | |
31 | #define valloc _mmap_valloc | |
32 | ||
33 | #define _bytes_free _mmap__bytes_free | |
34 | #define _bytes_used _mmap__bytes_used | |
35 | #define _chunks_free _mmap__chunks_free | |
36 | #define _chunks_used _mmap__chunks_used | |
37 | #define _fraghead _mmap__fraghead | |
38 | #define _heapbase _mmap__heapbase | |
39 | #define _heapindex _mmap__heapindex | |
40 | #define _heapinfo _mmap__heapinfo | |
41 | #define _heaplimit _mmap__heaplimit | |
42 | ||
43 | #define __default_morecore _mmap___default_morecore | |
44 | #define __free _mmap___free | |
45 | #define __free_hook _mmap___free_hook | |
46 | #define __malloc_hook _mmap___malloc_hook | |
47 | #define __malloc_initialized _mmap___malloc_initialized | |
48 | #define __morecore _mmap___morecore | |
49 | #define __realloc_hook _mmap___realloc_hook | |
50 | ||
51 | /* Arrange that instead of calling sbrk() we call mmap_sbrk() */ | |
52 | ||
53 | #define sbrk mmap_sbrk | |
54 | ||
55 | /* Now simply include the standard GNU malloc source, and all the | |
56 | externally visible symbols will become _mmap_* versions, and | |
57 | _mmap_sbrk will be called to get more core instead of sbrk. */ | |
58 | ||
59 | #include "gmalloc.c" | |
60 | ||
61 | /* Like mmap_malloc but get error if no storage available. */ | |
62 | ||
63 | PTR | |
64 | mmap_xmalloc (size) | |
65 | long size; | |
66 | { | |
67 | register char *val = NULL; | |
68 | ||
69 | /* Protect against gdb wanting to allocate zero bytes. */ | |
70 | ||
71 | if (size > 0) | |
72 | { | |
73 | if ((val = (char *) _mmap_malloc (size)) == NULL) | |
74 | { | |
75 | fatal ("virtual memory exhausted.", 0); | |
76 | } | |
77 | } | |
78 | return (val); | |
79 | } | |
80 | ||
81 | /* Like mmap_realloc but get error if no storage available. */ | |
82 | ||
83 | PTR | |
84 | mmap_xrealloc (ptr, size) | |
85 | PTR ptr; | |
86 | long size; | |
87 | { | |
88 | register char *val; | |
89 | ||
90 | if ((val = (char *) _mmap_realloc (ptr, size)) == NULL) | |
91 | { | |
92 | fatal ("virtual memory exhausted.", 0); | |
93 | } | |
94 | return (val); | |
95 | } | |
96 | ||
97 | PTR | |
98 | mmap_malloc (size) | |
99 | long size; | |
100 | { | |
101 | return (_mmap_malloc (size)); | |
102 | } | |
103 | ||
104 | PTR | |
105 | mmap_realloc (ptr, size) | |
106 | PTR ptr; | |
107 | long size; | |
108 | { | |
109 | return (_mmap_realloc (ptr, size)); | |
110 | } | |
111 | ||
112 | void | |
113 | mmap_free (ptr) | |
114 | PTR ptr; | |
115 | { | |
116 | _mmap_free (ptr); | |
117 | } | |
118 | ||
119 | #else /* !defined (HAVE_MMAP) */ | |
120 | ||
121 | static char *errmsg = "This version of gdb does not support dumpable state."; | |
122 | ||
123 | PTR | |
124 | mmap_malloc (size) | |
125 | long size; | |
126 | { | |
127 | error (errmsg); | |
128 | } | |
129 | ||
130 | PTR | |
131 | mmap_xmalloc (size) | |
132 | long size; | |
133 | { | |
134 | error (errmsg); | |
135 | } | |
136 | ||
137 | PTR | |
138 | mmap_realloc (ptr, size) | |
139 | PTR ptr; | |
140 | long size; | |
141 | { | |
142 | error (errmsg); | |
143 | } | |
144 | ||
145 | PTR | |
146 | mmap_xrealloc (ptr, size) | |
147 | PTR ptr; | |
148 | long size; | |
149 | { | |
150 | error (errmsg); | |
151 | } | |
152 | ||
153 | void | |
154 | mmap_free (ptr) | |
155 | PTR ptr; | |
156 | { | |
157 | error (errmsg); | |
158 | } | |
159 | ||
160 | #endif /* HAVE_MMAP */ |