4 # Babeltrace example script based on the Babeltrace API test script
6 # Copyright 2012 EfficiOS Inc.
8 # Author: Danny Serres <danny.serres@efficios.com>
10 # Permission is hereby granted, free of charge, to any person obtaining a copy
11 # of this software and associated documentation files (the "Software"), to deal
12 # in the Software without restriction, including without limitation the rights
13 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 # copies of the Software, and to permit persons to whom the Software is
15 # furnished to do so, subject to the following conditions:
17 # The above copyright notice and this permission notice shall be included in
18 # all copies or substantial portions of the Software.
20 # This example uses the babeltrace python module
21 # to partially test the api.
24 from babeltrace
import *
28 raise TypeError("Usage: python example-api-test.py path/to/file")
30 # Create TraceCollection and add trace:
31 traces
= TraceCollection()
32 trace_handle
= traces
.add_trace(sys
.argv
[1], "ctf")
33 if trace_handle
is None:
34 raise IOError("Error adding trace")
37 lst
= CTFReader
.get_event_decl_list(trace_handle
, traces
)
38 print("--- Event list ---")
40 print("event : {}".format(item
.get_name()))
43 for event
in traces
.events
:
44 print("TS: {}, {} : {}".format(event
.get_timestamp(),
45 event
.get_cycles(), event
.get_name()))
47 if event
.get_name() == "sched_switch":
48 prev_field
= event
.get_field("prev_comm")
49 if prev_field
is None:
50 print("ERROR: Missing prev_comm context info")
52 prev_comm
= prev_field
[0].get_value()
53 if prev_comm
is not None:
54 print("sched_switch prev_comm: {}".format(prev_comm
))
56 if event
.get_name() == "exit_syscall":
57 ret_field
= event
.get_field("ret")
59 print("ERROR: Unable to extract ret")
61 ret_code
= ret_field
[0].get_value()
62 if ret_code
is not None:
63 print("exit_syscall ret: {}".format(ret_code
))
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