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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <mdb/mdb_modapi.h>
28
29 #include <pthread.h>
30 #include <stddef.h>
31
32 #include <libuutil.h>
33 #include <libuutil_impl.h>
34
35 /*ARGSUSED*/
36 static int
uutil_status(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)37 uutil_status(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
38 {
39 pthread_t uu_panic_thread = 0;
40
41 if ((flags & DCMD_ADDRSPEC) || argc != 0)
42 return (DCMD_USAGE);
43
44 if (mdb_readvar(&uu_panic_thread, "uu_panic_thread") == -1) {
45 mdb_warn("unable to read uu_panic_thread");
46 }
47
48 if (uu_panic_thread != 0) {
49 mdb_printf("thread %d uu_panicked\n", uu_panic_thread);
50 }
51
52 return (DCMD_OK);
53 }
54
55 /*ARGSUSED*/
56 static int
uutil_listpool(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)57 uutil_listpool(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
58 {
59 uu_list_pool_t ulp;
60
61 if (!(flags & DCMD_ADDRSPEC)) {
62 if (mdb_walk_dcmd("uu_list_pool", "uu_list_pool", argc,
63 argv) == -1) {
64 mdb_warn("can't walk uu_list_pool");
65 return (DCMD_ERR);
66 }
67 return (DCMD_OK);
68 }
69
70 if (argc != 0)
71 return (DCMD_USAGE);
72
73 if (DCMD_HDRSPEC(flags))
74 mdb_printf("%-?s %-30s %?s %5s\n",
75 "ADDR", "NAME", "COMPARE", "FLAGS");
76
77 if (mdb_vread(&ulp, sizeof (uu_list_pool_t), addr) == -1) {
78 mdb_warn("failed to read uu_list_pool\n");
79 return (DCMD_ERR);
80 }
81
82 mdb_printf("%0?p %-30s %08x %c\n", addr, ulp.ulp_name, ulp.ulp_cmp,
83 ulp.ulp_debug ? 'D' : ' ');
84
85 return (DCMD_OK);
86 }
87
88 /*ARGSUSED*/
89 static int
uutil_list(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)90 uutil_list(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
91 {
92 uu_list_t ul;
93
94 if (!(flags & DCMD_ADDRSPEC) || argc != 0)
95 return (DCMD_USAGE);
96
97 if (mdb_vread(&ul, sizeof (uu_list_t), addr) == -1) {
98 mdb_warn("failed to read uu_list\n");
99 return (DCMD_ERR);
100 }
101
102 if (DCMD_HDRSPEC(flags))
103 mdb_printf("%-?s %-?s %-?s %6s %5s\n",
104 "ADDR", "POOL", "PARENT", "NODES", "FLAGS");
105
106 mdb_printf("%0?p %0?p %0?p %6u %c%c\n",
107 addr, ul.ul_pool, UU_PTR_DECODE(ul.ul_parent_enc),
108 ul.ul_numnodes, ul.ul_sorted ? 'S' : ' ', ul.ul_debug? 'D' : ' ');
109
110 return (DCMD_OK);
111 }
112
113 typedef struct uutil_listpool_walk {
114 uintptr_t ulpw_final;
115 uintptr_t ulpw_current;
116 } uutil_listpool_walk_t;
117
118 int
uutil_listpool_walk_init(mdb_walk_state_t * wsp)119 uutil_listpool_walk_init(mdb_walk_state_t *wsp)
120 {
121 uu_list_pool_t null_lpool;
122 uutil_listpool_walk_t *ulpw;
123 GElf_Sym sym;
124
125 bzero(&null_lpool, sizeof (uu_list_pool_t));
126
127 if (mdb_lookup_by_obj("libuutil.so.1", "uu_null_lpool", &sym) ==
128 -1) {
129 mdb_warn("failed to find 'uu_null_lpool'\n");
130 return (WALK_ERR);
131 }
132
133 if (mdb_vread(&null_lpool, sym.st_size, (uintptr_t)sym.st_value) ==
134 -1) {
135 mdb_warn("failed to read data from 'uu_null_lpool' address\n");
136 return (WALK_ERR);
137 }
138
139 ulpw = mdb_alloc(sizeof (uutil_listpool_walk_t), UM_SLEEP);
140
141 ulpw->ulpw_final = (uintptr_t)null_lpool.ulp_prev;
142 ulpw->ulpw_current = (uintptr_t)null_lpool.ulp_next;
143 wsp->walk_data = ulpw;
144
145 return (WALK_NEXT);
146 }
147
148 int
uutil_listpool_walk_step(mdb_walk_state_t * wsp)149 uutil_listpool_walk_step(mdb_walk_state_t *wsp)
150 {
151 uu_list_pool_t ulp;
152 uutil_listpool_walk_t *ulpw = wsp->walk_data;
153 int status;
154
155 if (mdb_vread(&ulp, sizeof (uu_list_pool_t),
156 ulpw->ulpw_current) == -1) {
157 mdb_warn("failed to read uu_list_pool %x", ulpw->ulpw_current);
158 return (WALK_ERR);
159 }
160
161 status = wsp->walk_callback(ulpw->ulpw_current, &ulp, wsp->walk_cbdata);
162
163 if (ulpw->ulpw_current == ulpw->ulpw_final)
164 return (WALK_DONE);
165
166 ulpw->ulpw_current = (uintptr_t)ulp.ulp_next;
167
168 return (status);
169 }
170
171 void
uutil_listpool_walk_fini(mdb_walk_state_t * wsp)172 uutil_listpool_walk_fini(mdb_walk_state_t *wsp)
173 {
174 uutil_listpool_walk_t *ulpw = wsp->walk_data;
175 mdb_free(ulpw, sizeof (uutil_listpool_walk_t));
176 }
177
178 typedef struct uutil_list_walk {
179 uintptr_t ulw_final;
180 uintptr_t ulw_current;
181 } uutil_list_walk_t;
182
183 int
uutil_list_walk_init(mdb_walk_state_t * wsp)184 uutil_list_walk_init(mdb_walk_state_t *wsp)
185 {
186 uutil_list_walk_t *ulw;
187 uu_list_pool_t ulp;
188
189 if (mdb_vread(&ulp, sizeof (uu_list_pool_t), wsp->walk_addr) == -1) {
190 mdb_warn("failed to read uu_list_pool_t at given address\n");
191 return (WALK_ERR);
192 }
193
194 if (UU_LIST_PTR(ulp.ulp_null_list.ul_next_enc) ==
195 &((uu_list_pool_t *)wsp->walk_addr)->ulp_null_list)
196 return (WALK_DONE);
197
198 ulw = mdb_alloc(sizeof (uutil_list_walk_t), UM_SLEEP);
199
200 ulw->ulw_final = (uintptr_t)UU_LIST_PTR(ulp.ulp_null_list.ul_prev_enc);
201 ulw->ulw_current =
202 (uintptr_t)UU_LIST_PTR(ulp.ulp_null_list.ul_next_enc);
203 wsp->walk_data = ulw;
204
205 return (WALK_NEXT);
206 }
207
208 int
uutil_list_walk_step(mdb_walk_state_t * wsp)209 uutil_list_walk_step(mdb_walk_state_t *wsp)
210 {
211 uu_list_t ul;
212 uutil_list_walk_t *ulw = wsp->walk_data;
213 int status;
214
215 if (mdb_vread(&ul, sizeof (uu_list_t), ulw->ulw_current) == -1) {
216 mdb_warn("failed to read uu_list %x", ulw->ulw_current);
217 return (WALK_ERR);
218 }
219
220 status = wsp->walk_callback(ulw->ulw_current, &ul, wsp->walk_cbdata);
221
222 if (ulw->ulw_current == ulw->ulw_final)
223 return (WALK_DONE);
224
225 ulw->ulw_current = (uintptr_t)UU_LIST_PTR(ul.ul_next_enc);
226
227 return (status);
228 }
229
230 void
uutil_list_walk_fini(mdb_walk_state_t * wsp)231 uutil_list_walk_fini(mdb_walk_state_t *wsp)
232 {
233 uutil_list_walk_t *ulw = wsp->walk_data;
234 mdb_free(ulw, sizeof (uutil_list_walk_t));
235 }
236
237 typedef struct uutil_list_node_walk {
238 size_t ulnw_offset;
239 uintptr_t ulnw_final;
240 uintptr_t ulnw_current;
241 void *ulnw_buf;
242 size_t ulnw_bufsz;
243 } uutil_list_node_walk_t;
244
245 int
uutil_list_node_walk_init(mdb_walk_state_t * wsp)246 uutil_list_node_walk_init(mdb_walk_state_t *wsp)
247 {
248 uutil_list_node_walk_t *ulnw;
249 uu_list_t ul;
250 uu_list_pool_t ulp;
251
252 if (mdb_vread(&ul, sizeof (uu_list_t), wsp->walk_addr) == -1) {
253 mdb_warn("failed to read uu_list_t at given address\n");
254 return (WALK_ERR);
255 }
256
257 if (mdb_vread(&ulp, sizeof (uu_list_pool_t), (uintptr_t)ul.ul_pool) ==
258 -1) {
259 mdb_warn("failed to read supporting uu_list_pool_t\n");
260 return (WALK_ERR);
261 }
262
263 ulnw = mdb_alloc(sizeof (uutil_list_node_walk_t), UM_SLEEP);
264
265 ulnw->ulnw_offset = ul.ul_offset;
266 ulnw->ulnw_final = wsp->walk_addr + offsetof(uu_list_t, ul_null_node);
267 ulnw->ulnw_current = (uintptr_t)ul.ul_null_node.uln_next;
268 ulnw->ulnw_buf = mdb_alloc(ulp.ulp_objsize, UM_SLEEP);
269 ulnw->ulnw_bufsz = ulp.ulp_objsize;
270
271 wsp->walk_data = ulnw;
272
273 return (WALK_NEXT);
274 }
275
276 int
uutil_list_node_walk_step(mdb_walk_state_t * wsp)277 uutil_list_node_walk_step(mdb_walk_state_t *wsp)
278 {
279 uu_list_node_impl_t uln;
280 uutil_list_node_walk_t *ulnw = wsp->walk_data;
281 int status;
282 uintptr_t diff;
283
284 if (ulnw->ulnw_current == ulnw->ulnw_final)
285 return (WALK_DONE);
286
287 if (mdb_vread(&uln, sizeof (uu_list_node_impl_t), ulnw->ulnw_current) ==
288 -1) {
289 mdb_warn("failed to read uu_list_node %x", ulnw->ulnw_current);
290 return (WALK_ERR);
291 }
292
293 diff = ulnw->ulnw_current - ulnw->ulnw_offset;
294
295 if (mdb_vread(ulnw->ulnw_buf, ulnw->ulnw_bufsz, diff) == -1) {
296 mdb_warn("failed to read enclosing structure %x", diff);
297 return (WALK_ERR);
298 }
299 /*
300 * Correct for offset; we return the address of the included structure.
301 */
302 status = wsp->walk_callback(diff, ulnw->ulnw_buf, wsp->walk_cbdata);
303
304 ulnw->ulnw_current = (uintptr_t)uln.uln_next;
305
306 return (status);
307 }
308
309 void
uutil_list_node_walk_fini(mdb_walk_state_t * wsp)310 uutil_list_node_walk_fini(mdb_walk_state_t *wsp)
311 {
312 uutil_list_node_walk_t *ulnw = wsp->walk_data;
313
314 mdb_free(ulnw->ulnw_buf, ulnw->ulnw_bufsz);
315 mdb_free(ulnw, sizeof (uutil_list_node_walk_t));
316 }
317
318 static const mdb_dcmd_t dcmds[] = {
319 { "uutil_status", NULL, "libuutil status summary", uutil_status },
320 { "uu_list_pool", NULL, "display uu_list_pool information",
321 uutil_listpool },
322 { "uu_list", NULL, "display uu_list information",
323 uutil_list },
324 { NULL }
325 };
326
327 static const mdb_walker_t walkers[] = {
328 { "uu_list_pool", "walk uu_list_pools",
329 uutil_listpool_walk_init, uutil_listpool_walk_step,
330 uutil_listpool_walk_fini },
331 { "uu_list", "given a uu_list_pool, walk its uu_lists",
332 uutil_list_walk_init, uutil_list_walk_step,
333 uutil_list_walk_fini },
334 { "uu_list_node",
335 "given a uu_list, walk its nodes, returning container addr",
336 uutil_list_node_walk_init, uutil_list_node_walk_step,
337 uutil_list_node_walk_fini },
338 { NULL }
339 };
340
341 static const mdb_modinfo_t modinfo = {
342 MDB_API_VERSION, dcmds, walkers
343 };
344
345 const mdb_modinfo_t *
_mdb_init(void)346 _mdb_init(void)
347 {
348 return (&modinfo);
349 }
350