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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) 1998-1999 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/mdb_modapi.h>
#include <sys/proc.h>
/*
* Initialize the proc_t walker by either using the given starting address,
* or reading the value of the kernel's practive pointer. We also allocate
* a proc_t for storage, and save this using the walk_data pointer.
*/
static int
sp_walk_init(mdb_walk_state_t *wsp)
{
if (wsp->walk_addr == NULL &&
mdb_readvar(&wsp->walk_addr, "practive") == -1) {
mdb_warn("failed to read 'practive'");
return (WALK_ERR);
}
wsp->walk_data = mdb_alloc(sizeof (proc_t), UM_SLEEP);
return (WALK_NEXT);
}
/*
* At each step, read a proc_t into our private storage, and then invoke
* the callback function. We terminate when we reach a NULL p_next pointer.
*/
static int
sp_walk_step(mdb_walk_state_t *wsp)
{
int status;
if (wsp->walk_addr == NULL)
return (WALK_DONE);
if (mdb_vread(wsp->walk_data, sizeof (proc_t), wsp->walk_addr) == -1) {
mdb_warn("failed to read proc at %p", wsp->walk_addr);
return (WALK_DONE);
}
status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
wsp->walk_cbdata);
wsp->walk_addr = (uintptr_t)(((proc_t *)wsp->walk_data)->p_next);
return (status);
}
/*
* The walker's fini function is invoked at the end of each walk. Since we
* dynamically allocated a proc_t in sp_walk_init, we must free it now.
*/
static void
sp_walk_fini(mdb_walk_state_t *wsp)
{
mdb_free(wsp->walk_data, sizeof (proc_t));
}
static int
simple_ps(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
{
struct pid pid;
proc_t p;
if (argc != 0)
return (DCMD_USAGE);
/*
* If no proc_t address was specified on the command line, we can
* print out all processes by invoking the walker, using this
* dcmd itself as the callback.
*/
if (!(flags & DCMD_ADDRSPEC)) {
if (mdb_walk_dcmd("simple_proc", "simple_ps",
argc, argv) == -1) {
mdb_warn("failed to walk 'simple_proc'");
return (DCMD_ERR);
}
return (DCMD_OK);
}
/*
* If this is the first invocation of the command, print a nice
* header line for the output that will follow.
*/
if (DCMD_HDRSPEC(flags))
mdb_printf("%5s %s\n", "PID", "COMM");
/*
* For each process, we just need to read the proc_t struct, read
* the pid struct addressed by p_pidp, and then print out the pid
* and the command name.
*/
if (mdb_vread(&p, sizeof (p), addr) == sizeof (p)) {
if (mdb_vread(&pid, sizeof (pid),
(uintptr_t)p.p_pidp) == sizeof (pid))
mdb_printf("%5d %s\n", pid.pid_id, p.p_user.u_comm);
else
mdb_warn("failed to read struct pid at %p", p.p_pidp);
} else
mdb_warn("failed to read process at %p", addr);
return (DCMD_OK);
}
/*
* MDB module linkage information:
*
* We declare a list of structures describing our dcmds, a list of structures
* describing our walkers, and a function named _mdb_init to return a pointer
* to our module information.
*/
static const mdb_dcmd_t dcmds[] = {
{ "simple_ps", NULL, "simple process list", simple_ps },
{ NULL }
};
static const mdb_walker_t walkers[] = {
{ "simple_proc", "walk list of proc_t structures",
sp_walk_init, sp_walk_step, sp_walk_fini },
{ NULL }
};
static const mdb_modinfo_t modinfo = {
MDB_API_VERSION, dcmds, walkers
};
const mdb_modinfo_t *
_mdb_init(void)
{
return (&modinfo);
}
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