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
26 open Kernel_task_struct
28 let run debug (image, ksymmap, utsname) =
30 let { domname = domname } = image in
35 eprintf (f_"%s: could not guess kernel version\n") domname;
37 | Some { kernel_release = v } -> v in
39 if not (task_struct_known kernel_version) then (
40 eprintf (f_"%s: %s: unknown kernel version
41 Try a newer version of virt-mem, or if the guest is not from a
42 supported Linux distribution, see this page about adding support:
43 http://et.redhat.com/~rjones/virt-mem/faq.html\n") domname kernel_version;
47 let task_struct_size = task_struct_size kernel_version in
49 let init_task, init_task_addr =
51 try Ksymmap.find "init_task" ksymmap
53 eprintf (f_"%s: could not find init_task in kernel image\n") domname;
56 get_task_struct kernel_version image.mem init_task_addr in
57 init_task, init_task_addr in
59 (* Starting at init_task, navigate through the linked list of
60 * tasks (through tasks.next). Grab each task_struct as we go.
63 let rec loop image acc task =
64 let next = task.task_struct_tasks'next in
65 if next <> init_task_addr then (
67 Virt_mem_mmap.is_mapped_range image.mem next task_struct_size in
69 if not mapped then load_memory image next task_struct_size
71 let task = get_task_struct kernel_version image.mem next in
74 task_struct_comm = truncate_c_string task.task_struct_comm
76 let acc = task :: acc in
81 loop image [] init_task in
83 (* Sort tasks by PID. *)
84 let cmp { task_struct_pid = p1 } { task_struct_pid = p2 } = compare p1 p2 in
85 let tasks = List.sort cmp tasks in
87 printf " PID STAT COMMAND\n";
91 printf "%5Ld %s\n" task.task_struct_pid task.task_struct_comm
96 let summary = s_"list processes in virtual machine"
97 let description = s_"\
98 virt-ps prints a process listing for virtual machines running under
101 let () = Virt_mem.register "ps" summary description ~run