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📄 Makefile	599 B	[ EDIT ] \| [ DEL ]
📄 __init__.py	55 B	[ EDIT ] \| [ DEL ]
📄 constants.py.in	1,330 B	[ EDIT ] \| [ DEL ]
📄 cpus.py	4,542 B	[ EDIT ] \| [ DEL ]
📄 dmesg.py	5,962 B	[ EDIT ] \| [ DEL ]
📄 lists.py	3,631 B	[ EDIT ] \| [ DEL ]
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📄 proc.py	8,604 B	[ EDIT ] \| [ DEL ]
📄 symbols.py	6,343 B	[ EDIT ] \| [ DEL ]
📄 tasks.py	3,543 B	[ EDIT ] \| [ DEL ]
📄 utils.py	5,120 B	[ EDIT ] \| [ DEL ]

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EDIT: tasks.py

#
# 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()