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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") | |
b0bb560c | 30 | print("Clock name is \"{}\"".format(clock.name)) |
14001277 | 31 | clock.description = "Simple clock" |
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32 | print("Clock description is \"{}\"".format(clock.description)) |
33 | print("Clock frequency is {}".format(clock.frequency)) | |
34 | print("Clock precision is {}".format(clock.precision)) | |
35 | print("Clock offset_seconds is {}".format(clock.offset_seconds)) | |
36 | print("Clock offset is {}".format(clock.offset)) | |
37 | print("Clock is absolute: {}".format(clock.absolute)) | |
38 | print("Clock time is {}".format(clock.time)) | |
da64442f | 39 | print("Clock UUID is {}".format(clock.uuid)) |
033fb0a7 JG |
40 | |
41 | writer.add_clock(clock) | |
42 | writer.add_environment_field("Python_version", str(sys.version_info)) | |
43 | ||
44 | stream_class = CTFWriter.StreamClass("test_stream") | |
14001277 | 45 | stream_class.clock = clock |
033fb0a7 JG |
46 | |
47 | event_class = CTFWriter.EventClass("SimpleEvent") | |
48 | ||
49 | # Create a int32_t equivalent type | |
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50 | int32_type = CTFWriter.IntegerFieldDeclaration(32) |
51 | int32_type.signed = True | |
033fb0a7 | 52 | |
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53 | # Create a uint16_t equivalent type |
54 | uint16_type = CTFWriter.IntegerFieldDeclaration(16) | |
55 | uint16_type.signed = False | |
56 | ||
033fb0a7 | 57 | # Create a string type |
14001277 | 58 | string_type = CTFWriter.StringFieldDeclaration() |
033fb0a7 JG |
59 | |
60 | # Create a structure type containing both an integer and a string | |
14001277 | 61 | structure_type = CTFWriter.StructureFieldDeclaration() |
033fb0a7 JG |
62 | structure_type.add_field(int32_type, "an_integer") |
63 | structure_type.add_field(string_type, "a_string_field") | |
64 | event_class.add_field(structure_type, "structure_field") | |
65 | ||
66 | # Create a floating point type | |
14001277 JG |
67 | floating_point_type = CTFWriter.FloatFieldDeclaration() |
68 | floating_point_type.exponent_digits = CTFWriter.FloatFieldDeclaration.FLT_EXP_DIG | |
69 | floating_point_type.mantissa_digits = CTFWriter.FloatFieldDeclaration.FLT_MANT_DIG | |
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70 | event_class.add_field(floating_point_type, "float_field") |
71 | ||
72 | # Create an enumeration type | |
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73 | int10_type = CTFWriter.IntegerFieldDeclaration(10) |
74 | enumeration_type = CTFWriter.EnumerationFieldDeclaration(int10_type) | |
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75 | enumeration_type.add_mapping("FIRST_ENTRY", 0, 4) |
76 | enumeration_type.add_mapping("SECOND_ENTRY", 5, 5) | |
77 | enumeration_type.add_mapping("THIRD_ENTRY", 6, 10) | |
78 | event_class.add_field(enumeration_type, "enum_field") | |
79 | ||
80 | # Create an array type | |
14001277 | 81 | array_type = CTFWriter.ArrayFieldDeclaration(int10_type, 5) |
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82 | event_class.add_field(array_type, "array_field") |
83 | ||
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84 | # Create a sequence type |
85 | sequence_type = CTFWriter.SequenceFieldDeclaration(int32_type, "sequence_len") | |
86 | event_class.add_field(uint16_type, "sequence_len") | |
87 | event_class.add_field(sequence_type, "sequence_field") | |
88 | ||
033fb0a7 JG |
89 | stream_class.add_event_class(event_class) |
90 | stream = writer.create_stream(stream_class) | |
91 | ||
92 | for i in range(100): | |
93 | event = CTFWriter.Event(event_class) | |
94 | ||
14001277 JG |
95 | clock.time = i * 1000 |
96 | structure_field = event.payload("structure_field") | |
97 | integer_field = structure_field.field("an_integer") | |
98 | integer_field.value = i | |
033fb0a7 | 99 | |
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100 | string_field = structure_field.field("a_string_field") |
101 | string_field.value = "Test string." | |
033fb0a7 | 102 | |
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103 | float_field = event.payload("float_field") |
104 | float_field.value = float(i) + (float(i) / 100.0) | |
033fb0a7 | 105 | |
14001277 | 106 | array_field = event.payload("array_field") |
033fb0a7 | 107 | for j in range(5): |
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108 | element = array_field.field(j) |
109 | element.value = i + j | |
033fb0a7 | 110 | |
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111 | event.payload("sequence_len").value = i % 10 |
112 | sequence_field = event.payload("sequence_field") | |
113 | sequence_field.length = event.payload("sequence_len") | |
114 | for j in range(event.payload("sequence_len").value): | |
115 | sequence_field.field(j).value = i + j | |
116 | ||
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117 | enumeration_field = event.payload("enum_field") |
118 | integer_field = enumeration_field.container | |
821ca76c | 119 | enumeration_field.value = i % 10 |
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120 | |
121 | stream.append_event(event) | |
122 | ||
123 | stream.flush() |