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
27 /*
28 * Display group information and walk all elements of a group
29 */
30
31 #include "group.h"
32
33 #include <mdb/mdb_modapi.h>
34 #include <sys/group.h>
35
36 /*
37 * Display group information
38 */
39
40 /* ARGSUSED */
41 int
group(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)42 group(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
43 {
44 group_t group;
45 int opt_q = 0; /* display only address. */
46
47 /* Should provide an address */
48 if (!(flags & DCMD_ADDRSPEC))
49 return (DCMD_USAGE);
50
51 if (mdb_getopts(argc, argv,
52 'q', MDB_OPT_SETBITS, TRUE, &opt_q,
53 NULL) != argc)
54 return (DCMD_USAGE);
55
56 if (flags & DCMD_PIPE_OUT)
57 opt_q = B_TRUE;
58
59 if (DCMD_HDRSPEC(flags) && !opt_q) {
60 mdb_printf("%?s %6s %9s %?s\n",
61 "ADDR",
62 "SIZE",
63 "CAPACITY",
64 "SET");
65 }
66
67 if (mdb_vread(&group, sizeof (struct group), addr) == -1) {
68 mdb_warn("unable to read 'group' at %p", addr);
69 return (DCMD_ERR);
70 }
71
72 if (opt_q) {
73 mdb_printf("%0?p\n", addr);
74 return (DCMD_OK);
75 }
76
77 mdb_printf("%?p %6d %9d %?p\n",
78 addr, group.grp_size, group.grp_capacity, group.grp_set);
79
80 return (DCMD_OK);
81 }
82
83 /*
84 * Walk all elements in the group set.
85 */
86
87 typedef struct group_walk {
88 uintptr_t *gw_set;
89 int gw_size;
90 int gw_pos;
91 int gw_initialized;
92 } group_walk_t;
93
94
95 /*
96 * Initialize the walk structure with the copy of a group set, its size and the
97 * initial pointer position.
98 */
99 int
group_walk_init(mdb_walk_state_t * wsp)100 group_walk_init(mdb_walk_state_t *wsp)
101 {
102 group_walk_t *gw;
103 group_t group;
104
105 gw = mdb_alloc(sizeof (group_walk_t), UM_SLEEP | UM_GC);
106
107 if (mdb_vread(&group, sizeof (struct group), wsp->walk_addr) == -1) {
108 mdb_warn("couldn't read 'group' at %p", wsp->walk_addr);
109 return (WALK_ERR);
110 }
111
112 gw->gw_size = group.grp_size;
113 gw->gw_initialized = 0;
114 gw->gw_pos = 0;
115
116 if (gw->gw_size < 0) {
117 mdb_warn("invalid group at %p", wsp->walk_addr);
118 return (WALK_ERR);
119 }
120
121 if (gw->gw_size == 0)
122 return (WALK_DONE);
123
124 /*
125 * Allocate space for the set and copy all set entries.
126 */
127 gw->gw_set = mdb_alloc(group.grp_size * sizeof (uintptr_t),
128 UM_SLEEP | UM_GC);
129
130 if (mdb_vread(gw->gw_set, group.grp_size * sizeof (uintptr_t),
131 (uintptr_t)group.grp_set) == -1) {
132 mdb_warn("couldn't read 'group set' at %p", group.grp_set);
133 return (WALK_ERR);
134 }
135
136 wsp->walk_data = gw;
137 wsp->walk_addr = gw->gw_set[0];
138 gw->gw_pos = 0;
139
140 return (WALK_NEXT);
141 }
142
143 /*
144 * Print element of the set and advance the pointer.
145 */
146 int
group_walk_step(mdb_walk_state_t * wsp)147 group_walk_step(mdb_walk_state_t *wsp)
148 {
149 group_walk_t *gw = (group_walk_t *)wsp->walk_data;
150 int status;
151
152 /*
153 * Already visited all valid elements, nothing else to do.
154 */
155 if (gw->gw_size < 0)
156 return (WALK_DONE);
157
158 /*
159 * Print non-NULL elements
160 */
161 status = wsp->walk_addr == 0 ?
162 WALK_NEXT :
163 wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
164 wsp->walk_cbdata);
165
166 /*
167 * Adjust walk_addr to point to the next element
168 */
169 gw->gw_size--;
170
171 if (gw->gw_size > 0)
172 wsp->walk_addr = gw->gw_set[++gw->gw_pos];
173 else
174 status = WALK_DONE;
175
176 return (status);
177 }
178