1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 *
26 * alloc.c -- memory allocation wrapper functions, for eft.so FMD module
27 *
28 */
29
30 #pragma ident "%Z%%M% %I% %E% SMI"
31
32 #include <stdlib.h>
33 #include <string.h>
34 #include <strings.h>
35 #include <fm/fmd_api.h>
36
37 #include "alloc.h"
38 #include "out.h"
39 #include "stats.h"
40
41 extern fmd_hdl_t *Hdl; /* handle from eft.c */
42
43 /* room to store size, possibly more to maintain alignment for long longs */
44 #define HDRSIZ sizeof (long long)
45
46 static struct stats *Malloctotal;
47 static struct stats *Freetotal;
48 static struct stats *Malloccount;
49 static struct stats *Freecount;
50
51 static int totalcount;
52
53 void
alloc_init(void)54 alloc_init(void)
55 {
56 Malloctotal = stats_new_counter("alloc.total", "bytes allocated", 1);
57 Freetotal = stats_new_counter("free.total", "bytes freed", 1);
58 Malloccount = stats_new_counter("alloc.calls", "alloc calls", 1);
59 Freecount = stats_new_counter("free.calls", "free calls", 1);
60 }
61
62 void
alloc_fini(void)63 alloc_fini(void)
64 {
65 struct stats *mt, *ft, *mc, *fc;
66
67 mt = Malloctotal;
68 ft = Freetotal;
69 mc = Malloccount;
70 fc = Freecount;
71
72 Malloctotal = NULL;
73 Freetotal = NULL;
74 Malloccount = NULL;
75 Freecount = NULL;
76
77 stats_delete(mt);
78 stats_delete(ft);
79 stats_delete(mc);
80 stats_delete(fc);
81 }
82
83 /*
84 * alloc_malloc -- a malloc() with checks
85 *
86 * this routine is typically called via the MALLOC() macro in alloc.h
87 */
88 /*ARGSUSED*/
89 void *
alloc_malloc(size_t nbytes,const char * fname,int line)90 alloc_malloc(size_t nbytes, const char *fname, int line)
91 {
92 char *retval;
93
94 ASSERT(nbytes > 0);
95
96 retval = fmd_hdl_alloc(Hdl, nbytes + HDRSIZ, FMD_SLEEP);
97
98 /* retval can't be NULL since fmd_hdl_alloc() sleeps for memory */
99
100 bcopy((void *)&nbytes, (void *)retval, sizeof (nbytes));
101 retval += HDRSIZ;
102
103 if (Malloctotal)
104 stats_counter_add(Malloctotal, nbytes);
105
106 if (Malloccount)
107 stats_counter_bump(Malloccount);
108
109 totalcount += nbytes + HDRSIZ;
110 return ((void *)retval);
111 }
112
113 /*
114 * alloc_realloc -- a realloc() with checks
115 *
116 * this routine is typically called via the REALLOC() macro in alloc.h
117 */
118 void *
alloc_realloc(void * ptr,size_t nbytes,const char * fname,int line)119 alloc_realloc(void *ptr, size_t nbytes, const char *fname, int line)
120 {
121 void *retval = alloc_malloc(nbytes, fname, line);
122
123 if (ptr != NULL) {
124 size_t osize;
125
126 bcopy((void *)((char *)ptr - HDRSIZ), (void *)&osize,
127 sizeof (osize));
128 /* now we have the new memory, copy in the old contents */
129 bcopy(ptr, retval, (osize < nbytes) ? osize : nbytes);
130
131 /* don't need the old memory anymore */
132 alloc_free((char *)ptr, fname, line);
133 }
134
135 return (retval);
136 }
137
138 /*
139 * alloc_strdup -- a strdup() with checks
140 *
141 * this routine is typically called via the STRDUP() macro in alloc.h
142 */
143 char *
alloc_strdup(const char * ptr,const char * fname,int line)144 alloc_strdup(const char *ptr, const char *fname, int line)
145 {
146 char *retval = alloc_malloc(strlen(ptr) + 1, fname, line);
147
148 (void) strcpy(retval, ptr);
149
150 return (retval);
151 }
152
153 /*
154 * alloc_free -- a free() with checks
155 *
156 * this routine is typically called via the FREE() macro in alloc.h
157 */
158 /*ARGSUSED*/
159 void
alloc_free(void * ptr,const char * fname,int line)160 alloc_free(void *ptr, const char *fname, int line)
161 {
162 size_t osize;
163
164 ASSERT(ptr != NULL);
165
166 bcopy((void *)((char *)ptr - HDRSIZ), (void *)&osize, sizeof (osize));
167
168 /* nothing to check in this version */
169
170 fmd_hdl_free(Hdl, (char *)ptr - HDRSIZ, osize + HDRSIZ);
171
172 if (Freetotal)
173 stats_counter_add(Freetotal, osize);
174
175 if (Freecount)
176 stats_counter_bump(Freecount);
177 totalcount -= osize + HDRSIZ;
178 }
179
180 int
alloc_total()181 alloc_total()
182 {
183 return (totalcount);
184 }
185
186 /*
187 * variants that don't maintain size in header - saves space
188 */
189 void *
alloc_xmalloc(size_t nbytes)190 alloc_xmalloc(size_t nbytes)
191 {
192 char *retval;
193
194 ASSERT(nbytes > 0);
195 retval = fmd_hdl_alloc(Hdl, nbytes, FMD_SLEEP);
196 if (Malloctotal)
197 stats_counter_add(Malloctotal, nbytes);
198 if (Malloccount)
199 stats_counter_bump(Malloccount);
200 totalcount += nbytes;
201 return ((void *)retval);
202 }
203
204 void
alloc_xfree(void * ptr,size_t size)205 alloc_xfree(void *ptr, size_t size)
206 {
207 ASSERT(ptr != NULL);
208
209 fmd_hdl_free(Hdl, (char *)ptr, size);
210 if (Freetotal)
211 stats_counter_add(Freetotal, size);
212 if (Freecount)
213 stats_counter_bump(Freecount);
214 totalcount -= size;
215 }
216