36453951fb
Mimics the C version that displays the contents of the flight recorder. With a core-dump in place source the python file then call 'display_flight_rec' to dump the data. Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
104 lines
3.9 KiB
Python
Executable File
104 lines
3.9 KiB
Python
Executable File
#
|
|
# Copyright © 2019 Collabora Ltd.
|
|
#
|
|
# Permission is hereby granted, free of charge, to any person obtaining
|
|
# a copy of this software and associated documentation files (the
|
|
# "Software"), to deal in the Software without restriction, including
|
|
# without limitation the rights to use, copy, modify, merge, publish,
|
|
# distribute, sublicense, and/or sell copies of the Software, and to
|
|
# permit persons to whom the Software is furnished to do so, subject to
|
|
# the following conditions:
|
|
#
|
|
# The above copyright notice and this permission notice (including the
|
|
# next paragraph) shall be included in all copies or substantial
|
|
# portions of the Software.
|
|
#
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
# SOFTWARE.
|
|
#
|
|
# Usage: source this script then 'display_flight_rec'
|
|
#
|
|
|
|
import gdb
|
|
|
|
class DisplayFlightRecorder(gdb.Command):
|
|
def __init__(self):
|
|
|
|
self.rb = ''
|
|
symbol_found = False
|
|
|
|
ring_buff = gdb.lookup_global_symbol("weston_primary_flight_recorder_ring_buffer")
|
|
if ring_buff == None:
|
|
print("'weston_ring_buffer' symbol not found!")
|
|
print("Either weston is too old or weston hasn't been loaded in memory")
|
|
else:
|
|
self.rb = ring_buff
|
|
self.display_rb_data(self.rb)
|
|
symbol_found = True
|
|
|
|
if symbol_found:
|
|
super(DisplayFlightRecorder, self).__init__("display_flight_rec",
|
|
gdb.COMMAND_DATA)
|
|
|
|
def display_rb_data(self, rb):
|
|
print("Flight recorder data found. Use 'display_flight_rec' "
|
|
"to display its contents")
|
|
# display this data (only) if symbol is not empty (happens if the program is not ran at all)
|
|
if rb.value():
|
|
print("Data at byte {append}, Size: {size}B, "
|
|
"Overlaped: {overlap}".format(append=rb.value()['append_pos'],
|
|
size=rb.value()['size'],
|
|
overlap=rb.value()['overlap']))
|
|
|
|
# poor's man fwrite()
|
|
def gen_contents(self, start, stop):
|
|
_str = ''
|
|
for j in range(start, stop):
|
|
_str += chr(self.rb.value()['buf'][j])
|
|
return _str
|
|
|
|
# mirrors C version, as to make sure we're not reading other parts...
|
|
def display_flight_rec_contents(self):
|
|
|
|
# symbol is there but not loaded, we're not far enough
|
|
if self.rb.value() == 0x0:
|
|
print("Flight recorder found, but not loaded yet!")
|
|
return
|
|
else:
|
|
print("Displaying flight recorder contents:")
|
|
|
|
append_pos = self.rb.value()['append_pos']
|
|
size = self.rb.value()['size']
|
|
overlap = self.rb.value()['overlap']
|
|
|
|
# if we haven't overflown and we're still at 0 means
|
|
# we still aren't far enough to be populated
|
|
if append_pos == 0 and not overlap:
|
|
print("Flight recorder doesn't have anything to display right now")
|
|
return
|
|
|
|
# now we can print stuff
|
|
rb_data = ''
|
|
if not overlap:
|
|
if append_pos:
|
|
rb_data = self.gen_contents(0, append_pos)
|
|
else:
|
|
rb_data = self.gen_contents(0, size)
|
|
else:
|
|
rb_data = self.gen_contents(append_pos, size)
|
|
rb_data += self.gen_contents(0, append_pos)
|
|
|
|
print("{data}".format(data=rb_data))
|
|
|
|
# called when invoking 'display_flight_rec'
|
|
def invoke(self, arg, from_tty):
|
|
self.display_flight_rec_contents()
|
|
|
|
DisplayFlightRecorder()
|