03a37ce754
* Add the 'attributes' field from QEMUTimer; * Stringify the field's value in accordance with macros from include/qemu/timer.h; * Make timer expiration times human-readable by converting from nanoseconds to appropriate units (ms/s/min/hrs/days) and showing the scale factor (ns/us/ms/s). Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20251204105019.455060-4-andrey.drobyshev@virtuozzo.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
94 lines
3.0 KiB
Python
94 lines
3.0 KiB
Python
# GDB debugging support
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#
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# Copyright 2017 Linaro Ltd
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#
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# Author: Alex Bennée <alex.bennee@linaro.org>
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#
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# This work is licensed under the terms of the GNU GPL, version 2 or later.
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# See the COPYING file in the top-level directory.
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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# 'qemu timers' -- display the current timerlists
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import gdb
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class TimersCommand(gdb.Command):
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'''Display the current QEMU timers'''
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def __init__(self):
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'Register the class as a gdb command'
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gdb.Command.__init__(self, 'qemu timers', gdb.COMMAND_DATA,
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gdb.COMPLETE_NONE)
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def _format_expire_time(self, expire_time, scale):
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"Return human-readable expiry time (ns) with scale info."
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secs = expire_time / 1e9
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# Select unit and compute value
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if secs < 1:
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val, unit = secs * 1000, "ms"
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elif secs < 60:
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val, unit = secs, "s"
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elif secs < 3600:
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val, unit = secs / 60, "min"
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elif secs < 86400:
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val, unit = secs / 3600, "hrs"
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else:
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val, unit = secs / 86400, "days"
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scale_map = {1: "ns", 1000: "us", 1000000: "ms",
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1000000000: "s"}
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scale_str = scale_map.get(scale, f"scale={scale}")
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return f"{val:.2f} {unit} [{scale_str}]"
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def _format_attribute(self, attr):
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"Given QEMUTimer attributes value, return a human-readable string"
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# From include/qemu/timer.h
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if attr == 0:
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value = 'NONE'
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elif attr == 1 << 0:
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value = 'ATTR_EXTERNAL'
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elif attr == int(0xffffffff):
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value = 'ATTR_ALL'
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else:
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value = 'UNKNOWN'
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return f'{attr} <{value}>'
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def dump_timers(self, timer):
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"Follow a timer and recursively dump each one in the list."
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# timer should be of type QemuTimer
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scale = int(timer['scale'])
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expire_time = int(timer['expire_time'])
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attributes = int(timer['attributes'])
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time_str = self._format_expire_time(expire_time, scale)
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attr_str = self._format_attribute(attributes)
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gdb.write(f" timer at {time_str} (attr:{attr_str}, "
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f"cb:{timer['cb']}, opq:{timer['opaque']})\n")
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if int(timer['next']) > 0:
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self.dump_timers(timer['next'])
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def process_timerlist(self, tlist, ttype):
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gdb.write("Processing %s timers\n" % (ttype))
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gdb.write(" clock %s is enabled:%s\n" % (
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tlist['clock']['type'],
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tlist['clock']['enabled']))
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if int(tlist['active_timers']) > 0:
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self.dump_timers(tlist['active_timers'])
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def invoke(self, arg, from_tty):
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'Run the command'
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main_timers = gdb.parse_and_eval("main_loop_tlg")
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# This will break if QEMUClockType in timer.h is redfined
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self.process_timerlist(main_timers['tl'][0], "Realtime")
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self.process_timerlist(main_timers['tl'][1], "Virtual")
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self.process_timerlist(main_timers['tl'][2], "Host")
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self.process_timerlist(main_timers['tl'][3], "Virtual RT")
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