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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
#
# gdb helper commands and functions for Linux kernel debugging
#
# task & thread tools
#
# Copyright (c) Siemens AG, 2011-2013
#
# Authors:
# Jan Kiszka <jan.kiszka@siemens.com>
#
# This work is licensed under the terms of the GNU GPL version 2.
#
import gdb
from linux import utils
task_type = utils.CachedType("struct task_struct")
def task_lists():
task_ptr_type = task_type.get_type().pointer()
init_task = gdb.parse_and_eval("init_task").address
t = g = init_task
while True:
while True:
yield t
t = utils.container_of(t['thread_group']['next'],
task_ptr_type, "thread_group")
if t == g:
break
t = g = utils.container_of(g['tasks']['next'],
task_ptr_type, "tasks")
if t == init_task:
return
def get_task_by_pid(pid):
for task in task_lists():
if int(task['pid']) == pid:
return task
return None
class LxTaskByPidFunc(gdb.Function):
"""Find Linux task by PID and return the task_struct variable.
$lx_task_by_pid(PID): Given PID, iterate over all tasks of the target and
return that task_struct variable which PID matches."""
def __init__(self):
super(LxTaskByPidFunc, self).__init__("lx_task_by_pid")
def invoke(self, pid):
task = get_task_by_pid(pid)
if task:
return task.dereference()
else:
raise gdb.GdbError("No task of PID " + str(pid))
LxTaskByPidFunc()
class LxPs(gdb.Command):
"""Dump Linux tasks."""
def __init__(self):
super(LxPs, self).__init__("lx-ps", gdb.COMMAND_DATA)
def invoke(self, arg, from_tty):
for task in task_lists():
gdb.write("{address} {pid} {comm}\n".format(
address=task,
pid=task["pid"],
comm=task["comm"].string()))
LxPs()
thread_info_type = utils.CachedType("struct thread_info")
ia64_task_size = None
def get_thread_info(task):
thread_info_ptr_type = thread_info_type.get_type().pointer()
if utils.is_target_arch("ia64"):
global ia64_task_size
if ia64_task_size is None:
ia64_task_size = gdb.parse_and_eval("sizeof(struct task_struct)")
thread_info_addr = task.address + ia64_task_size
thread_info = thread_info_addr.cast(thread_info_ptr_type)
else:
if task.type.fields()[0].type == thread_info_type.get_type():
return task['thread_info']
thread_info = task['stack'].cast(thread_info_ptr_type)
return thread_info.dereference()
class LxThreadInfoFunc (gdb.Function):
"""Calculate Linux thread_info from task variable.
$lx_thread_info(TASK): Given TASK, return the corresponding thread_info
variable."""
def __init__(self):
super(LxThreadInfoFunc, self).__init__("lx_thread_info")
def invoke(self, task):
return get_thread_info(task)
LxThreadInfoFunc()
class LxThreadInfoByPidFunc (gdb.Function):
"""Calculate Linux thread_info from task variable found by pid
$lx_thread_info_by_pid(PID): Given PID, return the corresponding thread_info
variable."""
def __init__(self):
super(LxThreadInfoByPidFunc, self).__init__("lx_thread_info_by_pid")
def invoke(self, pid):
task = get_task_by_pid(pid)
if task:
return get_thread_info(task.dereference())
else:
raise gdb.GdbError("No task of PID " + str(pid))
LxThreadInfoByPidFunc()
|
