| 1 | #!/usr/bin/env python3 |
| 2 | # ctf_writer.py |
| 3 | # |
| 4 | # Babeltrace CTF Writer example script. |
| 5 | # |
| 6 | # Copyright 2013 EfficiOS Inc. |
| 7 | # |
| 8 | # Author: Jérémie Galarneau <jeremie.galarneau@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 | import sys |
| 21 | import tempfile |
| 22 | from babeltrace import * |
| 23 | |
| 24 | trace_path = tempfile.mkdtemp() |
| 25 | |
| 26 | print("Writing trace at {}".format(trace_path)) |
| 27 | writer = CTFWriter.Writer(trace_path) |
| 28 | |
| 29 | clock = CTFWriter.Clock("A_clock") |
| 30 | clock.set_description("Simple clock") |
| 31 | |
| 32 | writer.add_clock(clock) |
| 33 | writer.add_environment_field("Python_version", str(sys.version_info)) |
| 34 | |
| 35 | stream_class = CTFWriter.StreamClass("test_stream") |
| 36 | stream_class.set_clock(clock) |
| 37 | |
| 38 | event_class = CTFWriter.EventClass("SimpleEvent") |
| 39 | |
| 40 | # Create a int32_t equivalent type |
| 41 | int32_type = CTFWriter.FieldTypeInteger(32) |
| 42 | int32_type.set_signed(True) |
| 43 | |
| 44 | # Create a string type |
| 45 | string_type = CTFWriter.FieldTypeString() |
| 46 | |
| 47 | # Create a structure type containing both an integer and a string |
| 48 | structure_type = CTFWriter.FieldTypeStructure() |
| 49 | structure_type.add_field(int32_type, "an_integer") |
| 50 | structure_type.add_field(string_type, "a_string_field") |
| 51 | event_class.add_field(structure_type, "structure_field") |
| 52 | |
| 53 | # Create a floating point type |
| 54 | floating_point_type = CTFWriter.FieldTypeFloatingPoint() |
| 55 | floating_point_type.set_exponent_digits(CTFWriter.FieldTypeFloatingPoint.FLT_EXP_DIG) |
| 56 | floating_point_type.set_mantissa_digits(CTFWriter.FieldTypeFloatingPoint.FLT_MANT_DIG) |
| 57 | event_class.add_field(floating_point_type, "float_field") |
| 58 | |
| 59 | # Create an enumeration type |
| 60 | int10_type = CTFWriter.FieldTypeInteger(10) |
| 61 | enumeration_type = CTFWriter.FieldTypeEnumeration(int10_type) |
| 62 | enumeration_type.add_mapping("FIRST_ENTRY", 0, 4) |
| 63 | enumeration_type.add_mapping("SECOND_ENTRY", 5, 5) |
| 64 | enumeration_type.add_mapping("THIRD_ENTRY", 6, 10) |
| 65 | event_class.add_field(enumeration_type, "enum_field") |
| 66 | |
| 67 | # Create an array type |
| 68 | array_type = CTFWriter.FieldTypeArray(int10_type, 5) |
| 69 | event_class.add_field(array_type, "array_field") |
| 70 | |
| 71 | stream_class.add_event_class(event_class) |
| 72 | stream = writer.create_stream(stream_class) |
| 73 | |
| 74 | for i in range(100): |
| 75 | event = CTFWriter.Event(event_class) |
| 76 | |
| 77 | structure_field = event.get_payload("structure_field") |
| 78 | integer_field = structure_field.get_field("an_integer") |
| 79 | integer_field.set_value(i) |
| 80 | |
| 81 | string_field = structure_field.get_field("a_string_field") |
| 82 | string_field.set_value("Test string.") |
| 83 | |
| 84 | float_field = event.get_payload("float_field") |
| 85 | float_field.set_value(float(i) + (float(i) / 100.0)) |
| 86 | |
| 87 | array_field = event.get_payload("array_field") |
| 88 | for j in range(5): |
| 89 | element = array_field.get_field(j) |
| 90 | element.set_value(i+j) |
| 91 | |
| 92 | enumeration_field = event.get_payload("enum_field") |
| 93 | integer_field = enumeration_field.get_container() |
| 94 | integer_field.set_value(i % 10) |
| 95 | |
| 96 | stream.append_event(event) |
| 97 | |
| 98 | stream.flush() |