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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2000-2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
/*
* Copyright (c) 2012 by Delphix. All rights reserved.
*/
#include <sys/thread.h>
#include "tsd.h"
/*
* Initialize the tsd walker by either using the given starting address,
* or reading the value of the kernel's tsd_list pointer.
*/
int
tsd_walk_init(mdb_walk_state_t *wsp)
{
if (wsp->walk_addr == 0 &&
mdb_readvar(&wsp->walk_addr, "tsd_list") == -1) {
mdb_warn("failed to read 'tsd_list'");
return (WALK_ERR);
}
wsp->walk_data = mdb_alloc(sizeof (struct tsd_thread), UM_SLEEP);
return (WALK_NEXT);
}
int
tsd_walk_step(mdb_walk_state_t *wsp)
{
int status;
if (wsp->walk_addr == 0)
return (WALK_DONE);
if (mdb_vread(wsp->walk_data,
sizeof (struct tsd_thread), wsp->walk_addr) == -1) {
mdb_warn("failed to read tsd at %p", wsp->walk_addr);
return (WALK_ERR);
}
status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
wsp->walk_cbdata);
wsp->walk_addr =
(uintptr_t)(((struct tsd_thread *)wsp->walk_data)->ts_next);
return (status);
}
void
tsd_walk_fini(mdb_walk_state_t *wsp)
{
mdb_free(wsp->walk_data, sizeof (struct tsd_thread));
}
/*
* Map from thread pointer to tsd pointer for given key
*/
int
ttotsd(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
kthread_t thread, *t = &thread;
struct tsd_thread tsdata, *ts = &tsdata;
uintptr_t key = 0;
uintptr_t eladdr;
void *element = NULL;
if (mdb_getopts(argc, argv, 'k', MDB_OPT_UINTPTR, &key, NULL) != argc)
return (DCMD_USAGE);
if (!(flags & DCMD_ADDRSPEC) || key == 0)
return (DCMD_USAGE);
if (mdb_vread(t, sizeof (*t), addr) == -1) {
mdb_warn("failed to read thread at %p", addr);
return (DCMD_ERR);
}
if (t->t_tsd == NULL)
goto out;
if (mdb_vread(ts, sizeof (*ts), (uintptr_t)t->t_tsd) == -1) {
mdb_warn("failed to read tsd at %p", t->t_tsd);
return (DCMD_ERR);
}
if (key > ts->ts_nkeys)
goto out;
eladdr = (uintptr_t)(ts->ts_value + key - 1);
if (mdb_vread(&element, sizeof (element), eladdr) == -1) {
mdb_warn("failed to read t->t_tsd[%d] at %p", key - 1, eladdr);
return (DCMD_ERR);
}
out:
if (element == NULL && (flags & DCMD_PIPE))
return (DCMD_OK);
mdb_printf("%p\n", element);
return (DCMD_OK);
}
static int
tsdthr_match(uintptr_t addr, const kthread_t *t, uintptr_t tsdaddr)
{
/*
* Allow for multiple matches, even though that "can't happen."
*/
if (tsdaddr == (uintptr_t)t->t_tsd)
mdb_printf("%p\n", addr);
return (WALK_NEXT);
}
/*
* Given a tsd pointer, find the owning thread
*/
/*ARGSUSED*/
int
tsdtot(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
if (addr == 0 || argc != 0)
return (DCMD_USAGE);
if (mdb_walk("thread", (mdb_walk_cb_t)(uintptr_t)tsdthr_match,
(void *)addr) == -1)
return (DCMD_ERR);
return (DCMD_OK);
}
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