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qemu/scripts/replay-dump.py
Chetan Pant 61f3c91a67 nomaintainer: Fix Lesser GPL version number 
There is no "version 2" of the "Lesser" General Public License.
It is either "GPL version 2.0" or "Lesser GPL version 2.1".
This patch replaces all occurrences of "Lesser GPL version 2" with
"Lesser GPL version 2.1" in comment section.

This patch contains all the files, whose maintainer I could not get
from ‘get_maintainer.pl’ script.

Signed-off-by: Chetan Pant <chetan4windows@gmail.com>
Message-Id: <20201023124424.20177-1-chetan4windows@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
[thuth: Adapted exec.c and qdev-monitor.c to new location]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-11-15 17:04:40 +01:00

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Dump the contents of a recorded execution stream
#
# Copyright (c) 2017 Alex Bennée <alex.bennee@linaro.org>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, see <http://www.gnu.org/licenses/>.
import argparse
import struct
from collections import namedtuple
# This mirrors some of the global replay state which some of the
# stream loading refers to. Some decoders may read the next event so
# we need handle that case. Calling reuse_event will ensure the next
# event is read from the cache rather than advancing the file.
class ReplayState(object):
def __init__(self):
self.event = -1
self.event_count = 0
self.already_read = False
self.current_checkpoint = 0
self.checkpoint = 0
def set_event(self, ev):
self.event = ev
self.event_count += 1
def get_event(self):
self.already_read = False
return self.event
def reuse_event(self, ev):
self.event = ev
self.already_read = True
def set_checkpoint(self):
self.checkpoint = self.event - self.checkpoint_start
def get_checkpoint(self):
return self.checkpoint
replay_state = ReplayState()
# Simple read functions that mirror replay-internal.c
# The file-stream is big-endian and manually written out a byte at a time.
def read_byte(fin):
"Read a single byte"
return struct.unpack('>B', fin.read(1))[0]
def read_event(fin):
"Read a single byte event, but save some state"
if replay_state.already_read:
return replay_state.get_event()
else:
replay_state.set_event(read_byte(fin))
return replay_state.event
def read_word(fin):
"Read a 16 bit word"
return struct.unpack('>H', fin.read(2))[0]
def read_dword(fin):
"Read a 32 bit word"
return struct.unpack('>I', fin.read(4))[0]
def read_qword(fin):
"Read a 64 bit word"
return struct.unpack('>Q', fin.read(8))[0]
# Generic decoder structure
Decoder = namedtuple("Decoder", "eid name fn")
def call_decode(table, index, dumpfile):
"Search decode table for next step"
decoder = next((d for d in table if d.eid == index), None)
if not decoder:
print("Could not decode index: %d" % (index))
print("Entry is: %s" % (decoder))
print("Decode Table is:\n%s" % (table))
return False
else:
return decoder.fn(decoder.eid, decoder.name, dumpfile)
# Print event
def print_event(eid, name, string=None, event_count=None):
"Print event with count"
if not event_count:
event_count = replay_state.event_count
if string:
print("%d:%s(%d) %s" % (event_count, name, eid, string))
else:
print("%d:%s(%d)" % (event_count, name, eid))
# Decoders for each event type
def decode_unimp(eid, name, _unused_dumpfile):
"Unimplimented decoder, will trigger exit"
print("%s not handled - will now stop" % (name))
return False
# Checkpoint decoder
def swallow_async_qword(eid, name, dumpfile):
"Swallow a qword of data without looking at it"
step_id = read_qword(dumpfile)
print(" %s(%d) @ %d" % (name, eid, step_id))
return True
async_decode_table = [ Decoder(0, "REPLAY_ASYNC_EVENT_BH", swallow_async_qword),
Decoder(1, "REPLAY_ASYNC_INPUT", decode_unimp),
Decoder(2, "REPLAY_ASYNC_INPUT_SYNC", decode_unimp),
Decoder(3, "REPLAY_ASYNC_CHAR_READ", decode_unimp),
Decoder(4, "REPLAY_ASYNC_EVENT_BLOCK", decode_unimp),
Decoder(5, "REPLAY_ASYNC_EVENT_NET", decode_unimp),
]
# See replay_read_events/replay_read_event
def decode_async(eid, name, dumpfile):
"""Decode an ASYNC event"""
print_event(eid, name)
async_event_kind = read_byte(dumpfile)
async_event_checkpoint = read_byte(dumpfile)
if async_event_checkpoint != replay_state.current_checkpoint:
print(" mismatch between checkpoint %d and async data %d" % (
replay_state.current_checkpoint, async_event_checkpoint))
return True
return call_decode(async_decode_table, async_event_kind, dumpfile)
def decode_instruction(eid, name, dumpfile):
ins_diff = read_dword(dumpfile)
print_event(eid, name, "0x%x" % (ins_diff))
return True
def decode_audio_out(eid, name, dumpfile):
audio_data = read_dword(dumpfile)
print_event(eid, name, "%d" % (audio_data))
return True
def decode_checkpoint(eid, name, dumpfile):
"""Decode a checkpoint.
Checkpoints contain a series of async events with their own specific data.
"""
replay_state.set_checkpoint()
# save event count as we peek ahead
event_number = replay_state.event_count
next_event = read_event(dumpfile)
# if the next event is EVENT_ASYNC there are a bunch of
# async events to read, otherwise we are done
if next_event != 3:
print_event(eid, name, "no additional data", event_number)
else:
print_event(eid, name, "more data follows", event_number)
replay_state.reuse_event(next_event)
return True
def decode_checkpoint_init(eid, name, dumpfile):
print_event(eid, name)
return True
def decode_interrupt(eid, name, dumpfile):
print_event(eid, name)
return True
def decode_clock(eid, name, dumpfile):
clock_data = read_qword(dumpfile)
print_event(eid, name, "0x%x" % (clock_data))
return True
# pre-MTTCG merge
v5_event_table = [Decoder(0, "EVENT_INSTRUCTION", decode_instruction),
Decoder(1, "EVENT_INTERRUPT", decode_interrupt),
Decoder(2, "EVENT_EXCEPTION", decode_unimp),
Decoder(3, "EVENT_ASYNC", decode_async),
Decoder(4, "EVENT_SHUTDOWN", decode_unimp),
Decoder(5, "EVENT_CHAR_WRITE", decode_unimp),
Decoder(6, "EVENT_CHAR_READ_ALL", decode_unimp),
Decoder(7, "EVENT_CHAR_READ_ALL_ERROR", decode_unimp),
Decoder(8, "EVENT_CLOCK_HOST", decode_clock),
Decoder(9, "EVENT_CLOCK_VIRTUAL_RT", decode_clock),
Decoder(10, "EVENT_CP_CLOCK_WARP_START", decode_checkpoint),
Decoder(11, "EVENT_CP_CLOCK_WARP_ACCOUNT", decode_checkpoint),
Decoder(12, "EVENT_CP_RESET_REQUESTED", decode_checkpoint),
Decoder(13, "EVENT_CP_SUSPEND_REQUESTED", decode_checkpoint),
Decoder(14, "EVENT_CP_CLOCK_VIRTUAL", decode_checkpoint),
Decoder(15, "EVENT_CP_CLOCK_HOST", decode_checkpoint),
Decoder(16, "EVENT_CP_CLOCK_VIRTUAL_RT", decode_checkpoint),
Decoder(17, "EVENT_CP_INIT", decode_checkpoint_init),
Decoder(18, "EVENT_CP_RESET", decode_checkpoint),
]
# post-MTTCG merge, AUDIO support added
v6_event_table = [Decoder(0, "EVENT_INSTRUCTION", decode_instruction),
Decoder(1, "EVENT_INTERRUPT", decode_interrupt),
Decoder(2, "EVENT_EXCEPTION", decode_unimp),
Decoder(3, "EVENT_ASYNC", decode_async),
Decoder(4, "EVENT_SHUTDOWN", decode_unimp),
Decoder(5, "EVENT_CHAR_WRITE", decode_unimp),
Decoder(6, "EVENT_CHAR_READ_ALL", decode_unimp),
Decoder(7, "EVENT_CHAR_READ_ALL_ERROR", decode_unimp),
Decoder(8, "EVENT_AUDIO_OUT", decode_audio_out),
Decoder(9, "EVENT_AUDIO_IN", decode_unimp),
Decoder(10, "EVENT_CLOCK_HOST", decode_clock),
Decoder(11, "EVENT_CLOCK_VIRTUAL_RT", decode_clock),
Decoder(12, "EVENT_CP_CLOCK_WARP_START", decode_checkpoint),
Decoder(13, "EVENT_CP_CLOCK_WARP_ACCOUNT", decode_checkpoint),
Decoder(14, "EVENT_CP_RESET_REQUESTED", decode_checkpoint),
Decoder(15, "EVENT_CP_SUSPEND_REQUESTED", decode_checkpoint),
Decoder(16, "EVENT_CP_CLOCK_VIRTUAL", decode_checkpoint),
Decoder(17, "EVENT_CP_CLOCK_HOST", decode_checkpoint),
Decoder(18, "EVENT_CP_CLOCK_VIRTUAL_RT", decode_checkpoint),
Decoder(19, "EVENT_CP_INIT", decode_checkpoint_init),
Decoder(20, "EVENT_CP_RESET", decode_checkpoint),
]
# Shutdown cause added
v7_event_table = [Decoder(0, "EVENT_INSTRUCTION", decode_instruction),
Decoder(1, "EVENT_INTERRUPT", decode_interrupt),
Decoder(2, "EVENT_EXCEPTION", decode_unimp),
Decoder(3, "EVENT_ASYNC", decode_async),
Decoder(4, "EVENT_SHUTDOWN", decode_unimp),
Decoder(5, "EVENT_SHUTDOWN_HOST_ERR", decode_unimp),
Decoder(6, "EVENT_SHUTDOWN_HOST_QMP", decode_unimp),
Decoder(7, "EVENT_SHUTDOWN_HOST_SIGNAL", decode_unimp),
Decoder(8, "EVENT_SHUTDOWN_HOST_UI", decode_unimp),
Decoder(9, "EVENT_SHUTDOWN_GUEST_SHUTDOWN", decode_unimp),
Decoder(10, "EVENT_SHUTDOWN_GUEST_RESET", decode_unimp),
Decoder(11, "EVENT_SHUTDOWN_GUEST_PANIC", decode_unimp),
Decoder(12, "EVENT_SHUTDOWN___MAX", decode_unimp),
Decoder(13, "EVENT_CHAR_WRITE", decode_unimp),
Decoder(14, "EVENT_CHAR_READ_ALL", decode_unimp),
Decoder(15, "EVENT_CHAR_READ_ALL_ERROR", decode_unimp),
Decoder(16, "EVENT_AUDIO_OUT", decode_audio_out),
Decoder(17, "EVENT_AUDIO_IN", decode_unimp),
Decoder(18, "EVENT_CLOCK_HOST", decode_clock),
Decoder(19, "EVENT_CLOCK_VIRTUAL_RT", decode_clock),
Decoder(20, "EVENT_CP_CLOCK_WARP_START", decode_checkpoint),
Decoder(21, "EVENT_CP_CLOCK_WARP_ACCOUNT", decode_checkpoint),
Decoder(22, "EVENT_CP_RESET_REQUESTED", decode_checkpoint),
Decoder(23, "EVENT_CP_SUSPEND_REQUESTED", decode_checkpoint),
Decoder(24, "EVENT_CP_CLOCK_VIRTUAL", decode_checkpoint),
Decoder(25, "EVENT_CP_CLOCK_HOST", decode_checkpoint),
Decoder(26, "EVENT_CP_CLOCK_VIRTUAL_RT", decode_checkpoint),
Decoder(27, "EVENT_CP_INIT", decode_checkpoint_init),
Decoder(28, "EVENT_CP_RESET", decode_checkpoint),
]
def parse_arguments():
"Grab arguments for script"
parser = argparse.ArgumentParser()
parser.add_argument("-f", "--file", help='record/replay dump to read from',
required=True)
return parser.parse_args()
def decode_file(filename):
"Decode a record/replay dump"
dumpfile = open(filename, "rb")
# read and throwaway the header
version = read_dword(dumpfile)
junk = read_qword(dumpfile)
print("HEADER: version 0x%x" % (version))
if version == 0xe02007:
event_decode_table = v7_event_table
replay_state.checkpoint_start = 12
elif version == 0xe02006:
event_decode_table = v6_event_table
replay_state.checkpoint_start = 12
else:
event_decode_table = v5_event_table
replay_state.checkpoint_start = 10
try:
decode_ok = True
while decode_ok:
event = read_event(dumpfile)
decode_ok = call_decode(event_decode_table, event, dumpfile)
finally:
dumpfile.close()
if __name__ == "__main__":
args = parse_arguments()
decode_file(args.file)
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