usr/src/cmd/mdb/common/modules/libsysevent/libsysevent.c

   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 2002-2003 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #include <sys/sysevent.h>
  28 #include <sys/sysevent_impl.h>
  29 #include <libsysevent.h>
  30 #include <libsysevent_impl.h>
  31 #include "../genunix/sysevent.h"
  32
  33 int
  34 sysevent(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
  35 {
  36         if ((flags & DCMD_ADDRSPEC) == 0)
  37                 return (DCMD_USAGE);
  38
  39         if ((flags & DCMD_LOOP) == 0) {
  40                 if (mdb_pwalk_dcmd("sysevent", "sysevent", argc, argv,
  41                     addr) == -1) {
  42                         mdb_warn("can't walk sysevent queue");
  43                         return (DCMD_ERR);
  44                 }
  45                 return (DCMD_OK);
  46         }
  47
  48         return (sysevent_buf(addr, flags, 0));
  49 }
  50
  51 /*ARGSUSED*/
  52 int
  53 sysevent_handle(uintptr_t addr, uint_t flags, int argc,
  54     const mdb_arg_t *argv)
  55 {
  56         ssize_t channel_name_sz;
  57         char channel_name[CLASS_LIST_FIELD_MAX];
  58         subscriber_priv_t sub;
  59         sysevent_impl_hdl_t sysevent_hdl;
  60
  61         if ((flags & DCMD_ADDRSPEC) == 0)
  62                 return (DCMD_USAGE);
  63
  64
  65         if (argc != 0)
  66                 return (DCMD_USAGE);
  67
  68
  69         if (mdb_vread(&sysevent_hdl, sizeof (sysevent_hdl),
  70             (uintptr_t)addr) == -1) {
  71                 mdb_warn("failed to read sysevent handle at %p", addr);
  72                 return (DCMD_ERR);
  73         }
  74         if ((channel_name_sz = mdb_readstr(channel_name, CLASS_LIST_FIELD_MAX,
  75             (uintptr_t)sysevent_hdl.sh_channel_name)) == -1) {
  76                 mdb_warn("failed to read channel name at %p",
  77                     sysevent_hdl.sh_channel_name);
  78                 return (DCMD_ERR);
  79         }
  80         if (channel_name_sz >= CLASS_LIST_FIELD_MAX - 1)
  81                 (void) strcpy(&channel_name[CLASS_LIST_FIELD_MAX - 4], "...");
  82
  83         if (sysevent_hdl.sh_type == SUBSCRIBER) {
  84                 if (mdb_vread(&sub, sizeof (sub),
  85                     (uintptr_t)sysevent_hdl.sh_priv_data) == -1) {
  86                         mdb_warn("failed to read sysevent handle at %p", addr);
  87                         return (DCMD_ERR);
  88                 }
  89
  90                 if (DCMD_HDRSPEC(flags))
  91                         mdb_printf("%<u>%-?s %-24s %-13s %-5s %-?s"
  92                             "%</u>\n", "ADDR", "NAME", "TYPE", "ID",
  93                             "EVENT QUEUE ADDR");
  94
  95                 mdb_printf("%-?p %-24s %-13s %-5lu %-?p\n",
  96                     addr, channel_name, "SUBSCRIBER", sysevent_hdl.sh_id,
  97                     (uintptr_t)sub.sp_evq_head);
  98
  99         } else {
 100                 if (DCMD_HDRSPEC(flags))
 101                         mdb_printf("%<u>%-?s %-24s %-13s %-5s %-?s"
 102                             "%</u>\n", "ADDR", "NAME",
 103                             "TYPE", "ID", "CLASS LIST ADDR");
 104
 105                 mdb_printf("%-?p %-24s %-13s %-5lu %-?p\n",
 106                     addr, channel_name, "PUBLISHER", sysevent_hdl.sh_id,
 107                     (uintptr_t)sysevent_hdl.sh_priv_data +
 108                     offsetof(publisher_priv_t, pp_class_hash));
 109         }
 110
 111         return (DCMD_OK);
 112 }
 113
 114 static const mdb_dcmd_t dcmds[] = {
 115         { "sysevent", "?[-v]", "print the contents of a sysevent queue",
 116                 sysevent},
 117         { "sysevent_handle", ":", "print sysevent subscriber/publisher handle",
 118                 sysevent_handle},
 119         { "sysevent_class_list", ":", "print sysevent class list",
 120                 sysevent_class_list },
 121         { "sysevent_subclass_list", ":", "print sysevent subclass list",
 122                 sysevent_subclass_list },
 123         { NULL }
 124 };
 125
 126 int
 127 sysevent_walk_init(mdb_walk_state_t *wsp)
 128 {
 129         if (wsp->walk_addr == (uintptr_t)NULL) {
 130                 mdb_warn("sysevent does not support global walks");
 131                 return (WALK_ERR);
 132         }
 133
 134         return (WALK_NEXT);
 135 }
 136
 137 int
 138 sysevent_walk_step(mdb_walk_state_t *wsp)
 139 {
 140         int status;
 141         sysevent_queue_t se_q;
 142
 143         if (wsp->walk_addr == (uintptr_t)NULL)
 144                 return (WALK_DONE);
 145
 146         if (mdb_vread(&se_q, sizeof (se_q), wsp->walk_addr) == -1) {
 147                 mdb_warn("failed to read sysevent queue at %p", wsp->walk_addr);
 148                 return (WALK_ERR);
 149         }
 150
 151         status = wsp->walk_callback((uintptr_t)se_q.sq_ev, NULL,
 152             wsp->walk_cbdata);
 153
 154         wsp->walk_addr = (uintptr_t)se_q.sq_next;
 155
 156         return (status);
 157 }
 158
 159 static const mdb_walker_t walkers[] = {
 160         { "sysevent", "walk sysevent buffer queue",
 161                 sysevent_walk_init, sysevent_walk_step,
 162                 NULL },
 163         { "sysevent_class_list", "walk sysevent subsccription class list",
 164                 sysevent_class_list_walk_init, sysevent_class_list_walk_step,
 165                 sysevent_class_list_walk_fini },
 166         { "sysevent_subclass_list", "walk sysevent subsccription subclass list",
 167                 sysevent_subclass_list_walk_init,
 168                 sysevent_subclass_list_walk_step, NULL },
 169         { NULL }
 170 };
 171
 172 static const mdb_modinfo_t modinfo = {
 173         MDB_API_VERSION, dcmds, walkers
 174 };
 175
 176 const mdb_modinfo_t *
 177 _mdb_init(void)
 178 {
 179         return (&modinfo);
 180 }