bindings/python/examples/sequence_test.py

   1 #!/usr/bin/env python3
   2 # sequence_test.py
   3 #
   4 # Babeltrace example script based on the Babeltrace API test script
   5 #
   6 # Copyright 2013 Xiaona Han
   7 # Copyright 2012 EfficiOS Inc.
   8 #
   9 # Author: Danny Serres <danny.serres@efficios.com>
  10 # Author: Xiaona Han <xiaonahappy13@163.com>
  11 #
  12 # Permission is hereby granted, free of charge, to any person obtaining a copy
  13 # of this software and associated documentation files (the "Software"), to deal
  14 # in the Software without restriction, including without limitation the rights
  15 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  16 # copies of the Software, and to permit persons to whom the Software is
  17 # furnished to do so, subject to the following conditions:
  18 #
  19 # The above copyright notice and this permission notice shall be included in
  20 # all copies or substantial portions of the Software.
  21
  22 # This example uses the babeltrace python module
  23 # to partially test the sequence API
  24
  25 import sys
  26 from babeltrace import *
  27
  28 # Check for path arg:
  29 if len(sys.argv) < 2:
  30         raise TypeError("Usage: sequence_test.py path/to/file")
  31
  32 # Create context and add trace:
  33 ctx = Context()
  34 trace_handle = ctx.add_trace(sys.argv[1], "ctf")
  35 if trace_handle is None:
  36         raise IOError("Error adding trace")
  37
  38 # Listing events
  39 lst = CTFReader.get_event_decl_list(trace_handle, ctx)
  40 print("--- Event list ---")
  41 for item in lst:
  42         print("event : {}".format(item.get_name()))
  43 print("--- Done ---")
  44
  45 # Iter trace
  46 bp = IterPos(SEEK_BEGIN)
  47 ctf_it = CTFReader.Iterator(ctx,bp)
  48 event = ctf_it.read_event()
  49
  50 while(event is not None):
  51         print("TS: {}, {} : {}".format(event.get_timestamp(),
  52                 event.get_cycles(), event.get_name()))
  53         field = event.get_field("seq_int_field")
  54         if field is not None:
  55                 print("int sequence values: {}". format(field[0].get_value()))
  56         field = event.get_field("seq_long_field")
  57         if field is not None:
  58                 print("long sequence values: {}". format(field[0].get_value()))
  59
  60         ret = ctf_it.next()
  61         if ret < 0:
  62                 break
  63         else:
  64                 event = ctf_it.read_event()
  65
  66 del ctf_it