blob: 63cd6c517e6da51a1e1461297fdf3d7b4fc93071 (
plain)
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
|
#
# 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")
class TaskList:
def __init__(self):
global task_type
self.task_ptr_type = task_type.get_type().pointer()
self.init_task = gdb.parse_and_eval("init_task")
self.curr_group = self.init_task.address
self.curr_task = None
def __iter__(self):
return self
def next(self):
t = self.curr_task
if not t or t == self.curr_group:
self.curr_group = \
utils.container_of(self.curr_group['tasks']['next'],
self.task_ptr_type, "tasks")
if self.curr_group == self.init_task.address:
raise StopIteration
t = self.curr_task = self.curr_group
else:
self.curr_task = \
utils.container_of(t['thread_group']['next'],
self.task_ptr_type, "thread_group")
return t
def get_task_by_pid(pid):
for task in TaskList():
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()
thread_info_type = utils.CachedType("struct thread_info")
ia64_task_size = None
def get_thread_info(task):
global thread_info_type
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:
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()
|
