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/* $Id$ */
/* Copyright (C) 1998 Joshua Sled
This file is part of LibGTop 1.0.
Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 1998.
LibGTop is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
LibGTop is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/prockernel.h>
#include <glibtop_suid.h>
#include <kvm.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/proc.h>
#ifndef __OpenBSD__
#include <sys/user.h>
#endif
#include <machine/pcb.h>
#ifdef __FreeBSD__
#include <machine/tss.h>
#endif
#include <unistd.h>
#include <fcntl.h>
#include <osreldate.h>
static const unsigned long _glibtop_sysdeps_proc_kernel_pstats =
(1 << GLIBTOP_PROC_KERNEL_MIN_FLT) +
(1 << GLIBTOP_PROC_KERNEL_MAJ_FLT) +
(1 << GLIBTOP_PROC_KERNEL_CMIN_FLT) +
(1 << GLIBTOP_PROC_KERNEL_CMAJ_FLT);
static const unsigned long _glibtop_sysdeps_proc_kernel_pcb =
(1 << GLIBTOP_PROC_KERNEL_KSTK_EIP) +
(1 << GLIBTOP_PROC_KERNEL_KSTK_ESP);
static const unsigned long _glibtop_sysdeps_proc_kernel_wchan =
(1 << GLIBTOP_PROC_KERNEL_NWCHAN) +
(1 << GLIBTOP_PROC_KERNEL_WCHAN);
/* Init function. */
void
glibtop_init_proc_kernel_p (glibtop *server)
{
server->sysdeps.proc_kernel = _glibtop_sysdeps_proc_kernel_pstats |
_glibtop_sysdeps_proc_kernel_pcb |
_glibtop_sysdeps_proc_kernel_wchan;
}
void
glibtop_get_proc_kernel_p (glibtop *server,
glibtop_proc_kernel *buf,
pid_t pid)
{
struct kinfo_proc *pinfo;
struct user *u_addr = (struct user *)USRSTACK;
struct pstats pstats;
struct pcb pcb;
int count;
char filename [BUFSIZ];
struct stat statb;
glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_PROC_KERNEL), 0);
memset (buf, 0, sizeof (glibtop_proc_kernel));
if (server->sysdeps.proc_time == 0)
return;
/* It does not work for the swapper task. */
if (pid == 0) return;
/* Get the process information */
pinfo = kvm_getprocs (server->machine.kd, KERN_PROC_PID, pid, &count);
if ((pinfo == NULL) || (count != 1))
glibtop_error_io_r (server, "kvm_getprocs (%d)", pid);
buf->nwchan = (unsigned long) pinfo [0].kp_proc.p_wchan &~ KERNBASE;
buf->flags |= (1 << GLIBTOP_PROC_KERNEL_NWCHAN);
if (pinfo [0].kp_proc.p_wchan && pinfo [0].kp_proc.p_wmesg) {
strncpy (buf->wchan, pinfo [0].kp_eproc.e_wmesg,
sizeof (buf->wchan) - 1);
buf->wchan [sizeof (buf->wchan) - 1] = 0;
buf->flags |= (1 << GLIBTOP_PROC_KERNEL_WCHAN);
} else {
buf->wchan [0] = 0;
}
/* Taken from `saveuser ()' in `/usr/src/bin/ps/ps.c'. */
/* [FIXME]: /usr/include/sys/user.h tells me that the user area
* may or may not be at the same kernel address in all
* processes, but I don't see any way to get that address.
* Since `ps' simply uses its own address, I think it's
* safe to do this here, too. */
/* NOTE: You need to mount the /proc filesystem to make
* `kvm_uread' work. */
sprintf (filename, "/proc/%d/mem", pid);
if (stat (filename, &statb)) return;
glibtop_suid_enter (server);
if ((pinfo [0].kp_proc.p_flag & P_INMEM) &&
kvm_uread (server->machine.kd, &(pinfo [0]).kp_proc,
(unsigned long) &u_addr->u_stats,
(char *) &pstats, sizeof (pstats)) == sizeof (pstats))
{
/*
* The u-area might be swapped out, and we can't get
* at it because we have a crashdump and no swap.
* If it's here fill in these fields, otherwise, just
* leave them 0.
*/
buf->min_flt = (u_int64_t) pstats.p_ru.ru_minflt;
buf->maj_flt = (u_int64_t) pstats.p_ru.ru_majflt;
buf->cmin_flt = (u_int64_t) pstats.p_cru.ru_minflt;
buf->cmaj_flt = (u_int64_t) pstats.p_cru.ru_majflt;
buf->flags |= _glibtop_sysdeps_proc_kernel_pstats;
}
if ((pinfo [0].kp_proc.p_flag & P_INMEM) &&
kvm_uread (server->machine.kd, &(pinfo [0]).kp_proc,
(unsigned long) &u_addr->u_pcb,
(char *) &pcb, sizeof (pcb)) == sizeof (pcb))
{
#ifdef __FreeBSD__
#if (__FreeBSD_version >= 300003)
buf->kstk_esp = (u_int64_t) pcb.pcb_esp;
buf->kstk_eip = (u_int64_t) pcb.pcb_eip;
#else
buf->kstk_esp = (u_int64_t) pcb.pcb_ksp;
buf->kstk_eip = (u_int64_t) pcb.pcb_pc;
#endif
#else
buf->kstk_esp = (u_int64_t) pcb.pcb_tss.tss_esp0;
buf->kstk_eip = (u_int64_t) pcb.pcb_tss.__tss_eip;
buf->flags |= _glibtop_sysdeps_proc_kernel_pcb;
#endif
}
/* Taken from `wchan ()' in `/usr/src/bin/ps/print.c'. */
glibtop_suid_leave (server);
}
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