example2.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* 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
* 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>
/*
* 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
{
mdb_warn("failed to read 'practive'");
return (WALK_ERR);
}
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
{
int status;
return (WALK_DONE);
return (WALK_DONE);
}
wsp->walk_cbdata);
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
{
}
static int
{
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)) {
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))
/*
* 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.
*/
else
} else
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[] = {
{ NULL }
};
static const mdb_walker_t walkers[] = {
{ "simple_proc", "walk list of proc_t structures",
{ NULL }
};
static const mdb_modinfo_t modinfo = {
};
const mdb_modinfo_t *
_mdb_init(void)
{
return (&modinfo);
}