Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128## 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 andreturn 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")
def get_thread_info(task): thread_info_ptr_type = thread_info_type.get_type().pointer() if task_type.get_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_infovariable."""
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_infovariable."""
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()