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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2018, Joyent, Inc.
*/
#include <mdb/mdb_modapi.h>
#include <mdb/mdb_ctf.h>
#include <inttypes.h>
#include <sys/refhash.h>
typedef struct refhash_walk_data {
size_t rwd_offset;
} refhash_walk_data_t;
int
refhash_walk_init(mdb_walk_state_t *wsp)
{
refhash_t refh = { 0 };
refhash_walk_data_t *rwd;
int offset;
/* mdb_ctf_offsetof_by_name() will print any errors */
if ((offset = mdb_ctf_offsetof_by_name("refhash_t", "rh_objs")) == -1)
return (WALK_ERR);
if (mdb_vread(&refh, sizeof (refhash_t), wsp->walk_addr) == -1) {
mdb_warn("failed to read refhash_t at %#lx", wsp->walk_addr);
return (WALK_ERR);
}
rwd = wsp->walk_data = mdb_zalloc(sizeof (*rwd), UM_SLEEP | UM_GC);
rwd->rwd_offset = refh.rh_link_off;
wsp->walk_addr += offset;
if (mdb_layered_walk("list", wsp) == -1) {
mdb_warn("can't walk refhash_t");
return (WALK_ERR);
}
return (WALK_NEXT);
}
int
refhash_walk_step(mdb_walk_state_t *wsp)
{
refhash_walk_data_t *rwd = wsp->walk_data;
uintptr_t addr = wsp->walk_addr - rwd->rwd_offset;
return (wsp->walk_callback(addr, wsp->walk_layer, wsp->walk_cbdata));
}
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