4 # Babeltrace CTF Writer example script.
6 # Copyright 2013 EfficiOS Inc.
8 # Author: Jérémie Galarneau <jeremie.galarneau@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 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 from babeltrace
import *
32 trace_path
= tempfile
.mkdtemp()
34 print("Writing trace at {}".format(trace_path
))
35 writer
= CTFWriter
.Writer(trace_path
)
37 clock
= CTFWriter
.Clock("A_clock")
38 print("Clock name is \"{}\"".format(clock
.name
))
39 clock
.description
= "Simple clock"
40 print("Clock description is \"{}\"".format(clock
.description
))
41 print("Clock frequency is {}".format(clock
.frequency
))
42 print("Clock precision is {}".format(clock
.precision
))
43 print("Clock offset_seconds is {}".format(clock
.offset_seconds
))
44 print("Clock offset is {}".format(clock
.offset
))
45 print("Clock is absolute: {}".format(clock
.absolute
))
46 print("Clock time is {}".format(clock
.time
))
47 print("Clock UUID is {}".format(clock
.uuid
))
49 writer
.add_clock(clock
)
50 writer
.add_environment_field("Python_version", str(sys
.version_info
))
52 stream_class
= CTFWriter
.StreamClass("test_stream")
53 stream_class
.clock
= clock
55 event_class
= CTFWriter
.EventClass("SimpleEvent")
57 # Create a int32_t equivalent type
58 int32_type
= CTFWriter
.IntegerFieldDeclaration(32)
59 int32_type
.signed
= True
61 # Create a uint16_t equivalent type
62 uint16_type
= CTFWriter
.IntegerFieldDeclaration(16)
63 uint16_type
.signed
= False
65 # Add a custom uint16_t field in the stream's packet context
66 packet_context_type
= stream_class
.packet_context_type
67 print("\nFields in default packet context:")
68 for field
in packet_context_type
.fields
:
69 print(str(type(field
[1])) + " " + field
[0])
70 packet_context_type
.add_field(uint16_type
, "a_custom_packet_context_field")
71 stream_class
.packet_context_type
= packet_context_type
73 # Create a string type
74 string_type
= CTFWriter
.StringFieldDeclaration()
76 # Create a structure type containing both an integer and a string
77 structure_type
= CTFWriter
.StructureFieldDeclaration()
78 structure_type
.add_field(int32_type
, "an_integer")
79 structure_type
.add_field(string_type
, "a_string_field")
80 event_class
.add_field(structure_type
, "structure_field")
82 # Create a floating point type
83 floating_point_type
= CTFWriter
.FloatFieldDeclaration()
84 floating_point_type
.exponent_digits
= CTFWriter
.FloatFieldDeclaration
.FLT_EXP_DIG
85 floating_point_type
.mantissa_digits
= CTFWriter
.FloatFieldDeclaration
.FLT_MANT_DIG
86 event_class
.add_field(floating_point_type
, "float_field")
88 # Create an enumeration type
89 int10_type
= CTFWriter
.IntegerFieldDeclaration(10)
90 enumeration_type
= CTFWriter
.EnumerationFieldDeclaration(int10_type
)
91 enumeration_type
.add_mapping("FIRST_ENTRY", 0, 4)
92 enumeration_type
.add_mapping("SECOND_ENTRY", 5, 5)
93 enumeration_type
.add_mapping("THIRD_ENTRY", 6, 10)
94 event_class
.add_field(enumeration_type
, "enum_field")
96 # Create an array type
97 array_type
= CTFWriter
.ArrayFieldDeclaration(int10_type
, 5)
98 event_class
.add_field(array_type
, "array_field")
100 # Create a sequence type
101 sequence_type
= CTFWriter
.SequenceFieldDeclaration(int32_type
, "sequence_len")
102 event_class
.add_field(uint16_type
, "sequence_len")
103 event_class
.add_field(sequence_type
, "sequence_field")
105 stream_class
.add_event_class(event_class
)
106 stream
= writer
.create_stream(stream_class
)
109 event
= CTFWriter
.Event(event_class
)
111 clock
.time
= i
* 1000
112 structure_field
= event
.payload("structure_field")
113 integer_field
= structure_field
.field("an_integer")
114 integer_field
.value
= i
116 string_field
= structure_field
.field("a_string_field")
117 string_field
.value
= "Test string."
119 float_field
= event
.payload("float_field")
120 float_field
.value
= float(i
) + (float(i
) / 100.0)
122 array_field
= event
.payload("array_field")
124 element
= array_field
.field(j
)
125 element
.value
= i
+ j
127 event
.payload("sequence_len").value
= i
% 10
128 sequence_field
= event
.payload("sequence_field")
129 sequence_field
.length
= event
.payload("sequence_len")
130 for j
in range(event
.payload("sequence_len").value
):
131 sequence_field
.field(j
).value
= i
+ j
133 enumeration_field
= event
.payload("enum_field")
134 integer_field
= enumeration_field
.container
135 enumeration_field
.value
= i
% 10
137 stream
.append_event(event
)
139 # Populate custom packet context field before flushing
140 packet_context
= stream
.packet_context
141 field
= packet_context
.field("a_custom_packet_context_field")
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