LXR qemu/scripts/qemugdb/timers.py

   1# -*- coding: utf-8 -*-
   2# GDB debugging support
   3#
   4# Copyright 2017 Linaro Ltd
   5#
   6# Author: Alex Bennée <alex.bennee@linaro.org>
   7#
   8# This work is licensed under the terms of the GNU GPL, version 2 or later.
   9# See the COPYING file in the top-level directory.
  10#
  11# SPDX-License-Identifier: GPL-2.0-or-later
  12
  13# 'qemu timers' -- display the current timerlists
  14
  15import gdb
  16
  17class TimersCommand(gdb.Command):
  18    '''Display the current QEMU timers'''
  19
  20    def __init__(self):
  21        'Register the class as a gdb command'
  22        gdb.Command.__init__(self, 'qemu timers', gdb.COMMAND_DATA,
  23                             gdb.COMPLETE_NONE)
  24
  25    def dump_timers(self, timer):
  26        "Follow a timer and recursively dump each one in the list."
  27        # timer should be of type QemuTimer
  28        gdb.write("    timer %s/%s (cb:%s,opq:%s)\n" % (
  29            timer['expire_time'],
  30            timer['scale'],
  31            timer['cb'],
  32            timer['opaque']))
  33
  34        if int(timer['next']) > 0:
  35            self.dump_timers(timer['next'])
  36
  37
  38    def process_timerlist(self, tlist, ttype):
  39        gdb.write("Processing %s timers\n" % (ttype))
  40        gdb.write("  clock %s is enabled:%s, last:%s\n" % (
  41            tlist['clock']['type'],
  42            tlist['clock']['enabled'],
  43            tlist['clock']['last']))
  44        if int(tlist['active_timers']) > 0:
  45            self.dump_timers(tlist['active_timers'])
  46
  47
  48    def invoke(self, arg, from_tty):
  49        'Run the command'
  50        main_timers = gdb.parse_and_eval("main_loop_tlg")
  51
  52        # This will break if QEMUClockType in timer.h is redfined
  53        self.process_timerlist(main_timers['tl'][0], "Realtime")
  54        self.process_timerlist(main_timers['tl'][1], "Virtual")
  55        self.process_timerlist(main_timers['tl'][2], "Host")
  56        self.process_timerlist(main_timers['tl'][3], "Virtual RT")
  57