forked from mirrors/linux
854f2764b5
Since commit8e1f385104("kill task_struct->thread_group") remove the thread_group, we will encounter below issue. (gdb) lx-ps TASK PID COMM 0xffff800086503340 0 swapper/0 Python Exception <class 'gdb.error'>: There is no member named thread_group. Error occurred in Python: There is no member named thread_group. We use signal->thread_head to iterate all threads instead. [Kuan-Ying.Lee@mediatek.com: v2] Link: https://lkml.kernel.org/r/20231129065142.13375-2-Kuan-Ying.Lee@mediatek.com Link: https://lkml.kernel.org/r/20231127070404.4192-2-Kuan-Ying.Lee@mediatek.com Fixes:8e1f385104("kill task_struct->thread_group") Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Cc: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
136 lines
3.5 KiB
Python
136 lines
3.5 KiB
Python
#
|
|
# 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, lists
|
|
|
|
|
|
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 = init_task
|
|
|
|
while True:
|
|
thread_head = t['signal']['thread_head']
|
|
for thread in lists.list_for_each_entry(thread_head, task_ptr_type, 'thread_node'):
|
|
yield thread
|
|
|
|
t = utils.container_of(t['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):
|
|
gdb.write("{:>10} {:>12} {:>7}\n".format("TASK", "PID", "COMM"))
|
|
for task in task_lists():
|
|
gdb.write("{} {:^5} {}\n".format(
|
|
task.format_string().split()[0],
|
|
task["pid"].format_string(),
|
|
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()
|