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 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _MDB_WCB_H 28 #define _MDB_WCB_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <mdb/mdb_module.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 /* 39 * Values for w_buftag, used as a guard to ensure that the walk state hasn't 40 * overflowed into the wcb. w_buftag is INITIAL when the wcb is first 41 * allocated, ACTIVE when added to a frame, and PASSIVE when removed. 42 */ 43 #define WCB_TAG_INITIAL 0xcbbabecb /* Magic tag for initialized wcb */ 44 #define WCB_TAG_ACTIVE 0xcba1cba1 /* Magic tag for active wcb */ 45 #define WCB_TAG_PASSIVE 0xcbdeadcb /* Magic tag for inactive wcb */ 46 47 struct mdb_frame; /* Forward declaration */ 48 49 typedef struct mdb_wcb { 50 mdb_walk_state_t w_state; /* Walk soft state */ 51 uint32_t w_buftag; /* WCB_TAG_* */ 52 int w_inited; /* Set if we've called walk_init */ 53 struct mdb_wcb *w_lyr_head; /* Link to head wcb in layer chain */ 54 struct mdb_wcb *w_lyr_link; /* Link to next wcb in layer chain */ 55 struct mdb_wcb *w_link; /* Link to next wcb in global chain */ 56 const mdb_iwalker_t *w_walker; /* Walker corresponding to this wcb */ 57 } mdb_wcb_t; 58 59 extern mdb_wcb_t *mdb_wcb_create(mdb_iwalker_t *, mdb_walk_cb_t, 60 void *, uintptr_t); 61 62 extern void mdb_wcb_destroy(mdb_wcb_t *); 63 extern mdb_wcb_t *mdb_wcb_from_state(mdb_walk_state_t *); 64 65 extern void mdb_wcb_insert(mdb_wcb_t *, struct mdb_frame *); 66 extern void mdb_wcb_delete(mdb_wcb_t *, struct mdb_frame *); 67 extern void mdb_wcb_purge(mdb_wcb_t **); 68 69 #ifdef __cplusplus 70 } 71 #endif 72 73 #endif /* _MDB_WCB_H */ 74