| 1 | #!/usr/bin/env python3 |
| 2 | # example_api_test.py |
| 3 | # |
| 4 | # Babeltrace example script based on the Babeltrace API test script |
| 5 | # |
| 6 | # Copyright 2012 EfficiOS Inc. |
| 7 | # |
| 8 | # Author: Danny Serres <danny.serres@efficios.com> |
| 9 | # |
| 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: |
| 16 | # |
| 17 | # The above copyright notice and this permission notice shall be included in |
| 18 | # all copies or substantial portions of the Software. |
| 19 | |
| 20 | # This example uses the babeltrace python module |
| 21 | # to partially test the api. |
| 22 | |
| 23 | import sys |
| 24 | from babeltrace import * |
| 25 | |
| 26 | # Check for path arg: |
| 27 | if len(sys.argv) < 2: |
| 28 | raise TypeError("Usage: python example-api-test.py path/to/file") |
| 29 | |
| 30 | # Create context and add trace: |
| 31 | ctx = Context() |
| 32 | trace_handle = ctx.add_trace(sys.argv[1], "ctf") |
| 33 | if trace_handle is None: |
| 34 | raise IOError("Error adding trace") |
| 35 | |
| 36 | # Listing events |
| 37 | lst = CTFReader.get_event_decl_list(trace_handle, ctx) |
| 38 | print("--- Event list ---") |
| 39 | for item in lst: |
| 40 | print("event : {}".format(item.get_name())) |
| 41 | print("--- Done ---") |
| 42 | |
| 43 | # Iter trace |
| 44 | bp = IterPos(SEEK_BEGIN) |
| 45 | ctf_it = CTFReader.Iterator(ctx,bp) |
| 46 | event = ctf_it.read_event() |
| 47 | |
| 48 | while(event is not None): |
| 49 | print("TS: {}, {} : {}".format(event.get_timestamp(), |
| 50 | event.get_cycles(), event.get_name())) |
| 51 | |
| 52 | if event.get_name() == "sched_switch": |
| 53 | prev_field = event.get_field("prev_comm") |
| 54 | if prev_field is None: |
| 55 | print("ERROR: Missing prev_comm context info") |
| 56 | else: |
| 57 | prev_comm = prev_field[0].get_value() |
| 58 | if prev_comm is not None: |
| 59 | print("sched_switch prev_comm: {}".format(prev_comm)) |
| 60 | |
| 61 | if event.get_name() == "exit_syscall": |
| 62 | ret_field = event.get_field("ret") |
| 63 | if ret_field is None: |
| 64 | print("ERROR: Unable to extract ret") |
| 65 | else: |
| 66 | ret_code = ret_field[0].get_value() |
| 67 | if ret_code is not None: |
| 68 | print("exit_syscall ret: {}".format(ret_code)) |
| 69 | |
| 70 | ret = ctf_it.next() |
| 71 | if ret < 0: |
| 72 | break |
| 73 | else: |
| 74 | event = ctf_it.read_event() |
| 75 | |
| 76 | del ctf_it |