1 (* Memory info for virtual domains.
2 (C) Copyright 2008 Richard W.M. Jones, Red Hat Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 open Virt_mem_gettext.Gettext
27 let run debug (image, ksymmap, utsname) =
29 let { domname = domname } = image in
34 eprintf (f_"%s: could not guess kernel version\n") domname;
36 | Some { kernel_release = v } -> v in
38 if not (Kernel_task_struct.known kernel_version) then (
39 eprintf (f_"%s: %s: unknown kernel version
40 Try a newer version of virt-mem, or if the guest is not from a
41 supported Linux distribution, see this page about adding support:
42 http://et.redhat.com/~rjones/virt-mem/faq.html\n") domname kernel_version;
46 let task_struct_size = Kernel_task_struct.size kernel_version in
48 let init_task, init_task_addr =
50 try Ksymmap.find "init_task" ksymmap
52 eprintf (f_"%s: could not find init_task in kernel image\n") domname;
55 (Virt_mem_mmap.unsafe_typed_addr_of_addr init_task_addr :
56 [ `task_struct ] Virt_mem_mmap.typed_addr) in
57 let init_task = Kernel_task_struct.get kernel_version image.mem addr in
58 init_task, init_task_addr in
60 (* Starting at init_task, navigate through the linked list of
61 * tasks (through tasks.next). Grab each task_struct as we go.
64 let rec loop image acc task =
65 let next = task.Kernel_task_struct.tasks'next in
66 let next_addr = Virt_mem_mmap.unsafe_addr_of_typed_addr next in
67 if next_addr <> init_task_addr then (
69 Virt_mem_mmap.is_mapped_range image.mem
70 next_addr task_struct_size in
72 if not mapped then load_memory image next_addr task_struct_size
74 let task = Kernel_task_struct.get kernel_version image.mem next in
75 let acc = task :: acc in
80 loop image [] init_task in
84 printf "%S\n" task.Kernel_task_struct.comm
90 let summary = s_"list processes in virtual machine"
91 let description = s_"\
92 virt-ps prints a process listing for virtual machines running under
95 let () = Virt_mem.register "ps" summary description ~run