1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
require "ffi"
class GetProcessMem
class Darwin
extend FFI::Library
ffi_lib "proc"
class TaskInfo < FFI::Struct
layout :pti_virtual_size, :uint64,
:pti_resident_size, :uint64,
:pti_total_user, :uint64,
:pti_total_system, :uint64,
:pti_threads_user, :uint64,
:pti_threads_system, :uint64,
:pti_policy, :int32,
:pti_faults, :int32,
:pti_pageins, :int32,
:pti_cow_faults, :int32,
:pti_messages_sent, :int32,
:pti_messages_received, :int32,
:pti_syscalls_mach, :int32,
:pti_syscalls_unix, :int32,
:pti_csw, :int32,
:pti_threadnum, :int32,
:pti_numrunning, :int32,
:pti_priority, :int32
end
attach_function :proc_pidinfo,
[
:int, # pid
:int, # flavour
:uint64, # arg, not needed for this selector
TaskInfo.by_ref, # output buffer
:int # size of buffer
],
:int
PROC_PIDTASKINFO = 4 # from sys/proc_info.h
class << self
def resident_size(pid)
get_proc_pidinfo(pid)[:pti_resident_size]
end
private
def get_proc_pidinfo(pid)
data = TaskInfo.new
result = proc_pidinfo(pid, PROC_PIDTASKINFO, 0, data, TaskInfo.size)
if result == TaskInfo.size
data
else
raise SystemCallError.new("proc_pidinfo returned #{result}", FFI.errno)
end
end
end
end
end
|
