xref: /openbmc/qemu/scripts/qemugdb/timers.py (revision 0a553c58)
1#!/usr/bin/python
2# -*- coding: utf-8 -*-
3# GDB debugging support
4#
5# Copyright 2017 Linaro Ltd
6#
7# Author: Alex Bennée <alex.bennee@linaro.org>
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
16import gdb
17
18class 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")
58