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/* $OpenBSD: procmap.c,v 1.6 2011/06/06 17:12:12 jasper Exp $ */
/* 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 <config.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/procmap.h>
#include <glibtop_suid.h>
#include <kvm.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/resource.h>
#include <uvm/uvm_extern.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <sys/ucred.h>
#include <sys/sysctl.h>
#undef _KERNEL
#define _UVM_UVM_AMAP_I_H_ 1
#define _UVM_UVM_MAP_I_H_ 1
#include <uvm/uvm.h>
static const unsigned long _glibtop_sysdeps_proc_map =
(1L << GLIBTOP_PROC_MAP_TOTAL) + (1L << GLIBTOP_PROC_MAP_NUMBER) +
(1L << GLIBTOP_PROC_MAP_SIZE);
static const unsigned long _glibtop_sysdeps_map_entry =
(1L << GLIBTOP_MAP_ENTRY_START) + (1L << GLIBTOP_MAP_ENTRY_END) +
(1L << GLIBTOP_MAP_ENTRY_OFFSET) + (1L << GLIBTOP_MAP_ENTRY_PERM) +
(1L << GLIBTOP_MAP_ENTRY_INODE) + (1L << GLIBTOP_MAP_ENTRY_DEVICE);
/* Init function. */
void
_glibtop_init_proc_map_p (glibtop *server)
{
server->sysdeps.proc_map = _glibtop_sysdeps_proc_map;
}
/*
* Provides detailed information about a process.
* Due to the fact we are only requested info about one process, it's possible
* the process has been reaped before we get to kvm_getproc2. Tough luck.
*/
glibtop_map_entry *
glibtop_get_proc_map_p (glibtop *server, glibtop_proc_map *buf,
pid_t pid)
{
struct kinfo_proc2 *pinfo;
struct vm_map_entry entry, *first;
struct vmspace vmspace;
struct vnode vnode;
struct inode inode;
GArray *maps = g_array_sized_new(FALSE, FALSE,
sizeof(glibtop_map_entry),
100);
int count, i = 0;
int update = 0;
glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_PROC_MAP), 0);
memset (buf, 0, sizeof (glibtop_proc_map));
/* It does not work for the swapper task. */
if (pid == 0) return (glibtop_map_entry*) g_array_free(maps, TRUE);
glibtop_suid_enter (server);
/* Get the process data */
pinfo = kvm_getproc2 (server->machine.kd, KERN_PROC_PID, pid, sizeof(struct kinfo_proc2), &count);
if ((pinfo == NULL) || (count < 1)) {
glibtop_warn_io_r (server, "kvm_getprocs (%d)", pid);
return (glibtop_map_entry*) g_array_free(maps, TRUE);
}
/* Now we get the memory maps. */
if (kvm_read (server->machine.kd,
(unsigned long) pinfo [0].p_vmspace,
(char *) &vmspace, sizeof (vmspace)) != sizeof (vmspace))
glibtop_error_io_r (server, "kvm_read (vmspace)");
first = vmspace.vm_map.header.next;
if (kvm_read (server->machine.kd,
(unsigned long) vmspace.vm_map.header.next,
(char *) &entry, sizeof (entry)) != sizeof (entry))
glibtop_error_io_r (server, "kvm_read (entry)");
/* Allocate space. */
buf->number = vmspace.vm_map.nentries;
buf->size = sizeof (glibtop_map_entry);
buf->total = buf->number * buf->size;
buf->flags = _glibtop_sysdeps_proc_map;
/* Walk through the `vm_map_entry' list ... */
/* I tested this a few times with `mmap'; as soon as you write
* to the mmap'ed area, the object type changes from OBJT_VNODE
* to OBJT_DEFAULT so it seems this really works.
*/
do {
glibtop_map_entry *mentry;
unsigned long inum, dev;
guint len;
if (update) {
if (kvm_read (server->machine.kd,
(unsigned long) entry.next,
&entry, sizeof (entry)) != sizeof (entry))
glibtop_error_io_r (server, "kvm_read (entry)");
} else {
update = 1;
}
if (UVM_ET_ISSUBMAP (&entry))
continue;
if (!entry.object.uvm_obj)
continue;
/* We're only interested in vnodes */
if (kvm_read (server->machine.kd,
(unsigned long) entry.object.uvm_obj,
&vnode, sizeof (vnode)) != sizeof (vnode)) {
glibtop_warn_io_r (server, "kvm_read (vnode)");
return (glibtop_map_entry*) g_array_free(maps, TRUE);
}
#if defined(UVM_VNODE_VALID)
if (!vnode.v_uvm.u_flags & UVM_VNODE_VALID)
continue;
#endif
if ((vnode.v_type != VREG) || (vnode.v_tag != VT_UFS) ||
!vnode.v_data) continue;
if (kvm_read (server->machine.kd,
(unsigned long) vnode.v_data,
&inode, sizeof (inode)) != sizeof (inode))
glibtop_error_io_r (server, "kvm_read (inode)");
inum = inode.i_number;
dev = inode.i_dev;
len = maps->len;
g_array_set_size(maps, len + 1);
mentry = &g_array_index(maps, glibtop_map_entry, len);
mentry->flags = _glibtop_sysdeps_map_entry;
mentry->start = (guint64) entry.start;
mentry->end = (guint64) entry.end;
mentry->offset = (guint64) entry.offset;
mentry->device = (guint64) dev;
mentry->inode = (guint64) inum;
mentry->perm = (guint64) 0;
if (entry.protection & VM_PROT_READ)
mentry->perm |= GLIBTOP_MAP_PERM_READ;
if (entry.protection & VM_PROT_WRITE)
mentry->perm |= GLIBTOP_MAP_PERM_WRITE;
if (entry.protection & VM_PROT_EXECUTE)
mentry->perm |= GLIBTOP_MAP_PERM_EXECUTE;
} while (entry.next != first);
buf->flags = _glibtop_sysdeps_proc_map;
buf->number = maps->len;
buf->size = sizeof (glibtop_map_entry);
buf->total = buf->number * buf->size;
return (glibtop_map_entry*) g_array_free(maps, FALSE);
}
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