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+#!/usr/bin/env python
+# -*- 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 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)