From e69d89c1c07ea7b79160a37c36b7cc02dd5eecbd Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Thu, 1 Jan 1970 00:00:00 +0000
Subject: [PATCH] Print swapper task details.

---
 ps/.depend    |  6 ++++--
 ps/virt_ps.ml | 37 +++++++++++++++++++++++++++++++++++--
 2 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/ps/.depend b/ps/.depend
index 0614d06..11d70ae 100644
--- a/ps/.depend
+++ b/ps/.depend
@@ -1,4 +1,6 @@
 virt_ps.cmo: ../lib/virt_mem_utils.cmo ../lib/virt_mem_types.cmi \
-    ../lib/virt_mem_gettext.cmo ../lib/virt_mem.cmi 
+    ../lib/virt_mem_mmap.cmi ../lib/virt_mem_gettext.cmo ../lib/virt_mem.cmi \
+    ../lib/kernel_task_struct.cmi 
 virt_ps.cmx: ../lib/virt_mem_utils.cmx ../lib/virt_mem_types.cmx \
-    ../lib/virt_mem_gettext.cmx ../lib/virt_mem.cmx 
+    ../lib/virt_mem_mmap.cmx ../lib/virt_mem_gettext.cmx ../lib/virt_mem.cmx \
+    ../lib/kernel_task_struct.cmx 
diff --git a/ps/virt_ps.ml b/ps/virt_ps.ml
index 41e8af7..7d8534c 100644
--- a/ps/virt_ps.ml
+++ b/ps/virt_ps.ml
@@ -24,9 +24,42 @@ open Virt_mem_utils
 open Virt_mem_types
 
 
+let run debug ({ domname = domname; mem = mem }, ksymmap, utsname) =
+  try
+    let kernel_version =
+      match utsname with
+      | None ->
+	  eprintf (f_"%s: could not guess kernel version\n") domname;
+	  raise Exit
+      | Some { kernel_release = v } -> v in
 
-let run debug ({ mem = mem }, ksymmap, _) =
-  ()
+    if not (Kernel_task_struct.known kernel_version) then (
+      eprintf (f_"%s: %s: unknown kernel version
+Try a newer version of virt-mem, or if the guest is not from a
+supported Linux distribution, see this page about adding support:
+  http://et.redhat.com/~rjones/virt-mem/faq.html\n") domname kernel_version;
+      raise Exit
+    );
+
+    let init_task =
+      let addr =
+	try Ksymmap.find "init_task" ksymmap
+	with Not_found ->
+	  eprintf (f_"%s: could not find init_task in kernel image\n") domname;
+	  raise Exit in
+      let addr =
+	(Virt_mem_mmap.unsafe_typed_addr_of_addr addr :
+	   [ `task_struct ] Virt_mem_mmap.typed_addr) in
+      Kernel_task_struct.get kernel_version mem addr in
+
+    printf "comm = %S prio = %Ld state = %Ld static_prio = %Ld tasks'next = %Lx\n"
+      init_task.Kernel_task_struct.comm
+      init_task.Kernel_task_struct.prio
+      init_task.Kernel_task_struct.state
+      init_task.Kernel_task_struct.static_prio
+      (Virt_mem_mmap.unsafe_addr_of_typed_addr init_task.Kernel_task_struct.tasks'next);
+
+  with Exit -> ()
 
 let summary = s_"list processes in virtual machine"
 let description = s_"\
-- 
1.8.3.1