scripts/qemugdb/timers.py

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