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# Copyright 2019 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
""" Classes representing perfetto trace protobuf messages.
This module makes use of neither python-protobuf library nor python classes
compiled from .proto definitions, because currently there's no way to
deploy those to all the places where telemetry is run.
TODO(crbug.com/944078): Remove this module after the python-protobuf library
is deployed to all the bots.
Definitions of perfetto messages can be found here:
https://android.googlesource.com/platform/external/perfetto/+/refs/heads/master/protos/perfetto/trace/
"""
import encoder
import wire_format
class TracePacket(object):
def __init__(self):
self.interned_data = None
self.thread_descriptor = None
self.incremental_state_cleared = None
self.track_event = None
self.trusted_packet_sequence_id = None
self.chrome_benchmark_metadata = None
def encode(self):
parts = []
if self.trusted_packet_sequence_id is not None:
writer = encoder.UInt32Encoder(10, False, False)
writer(parts.append, self.trusted_packet_sequence_id)
if self.track_event is not None:
tag = encoder.TagBytes(11, wire_format.WIRETYPE_LENGTH_DELIMITED)
data = self.track_event.encode()
length = encoder._VarintBytes(len(data))
parts += [tag, length, data]
if self.interned_data is not None:
tag = encoder.TagBytes(12, wire_format.WIRETYPE_LENGTH_DELIMITED)
data = self.interned_data.encode()
length = encoder._VarintBytes(len(data))
parts += [tag, length, data]
if self.incremental_state_cleared is not None:
writer = encoder.BoolEncoder(41, False, False)
writer(parts.append, self.incremental_state_cleared)
if self.thread_descriptor is not None:
tag = encoder.TagBytes(44, wire_format.WIRETYPE_LENGTH_DELIMITED)
data = self.thread_descriptor.encode()
length = encoder._VarintBytes(len(data))
parts += [tag, length, data]
if self.chrome_benchmark_metadata is not None:
tag = encoder.TagBytes(48, wire_format.WIRETYPE_LENGTH_DELIMITED)
data = self.chrome_benchmark_metadata.encode()
length = encoder._VarintBytes(len(data))
parts += [tag, length, data]
return b"".join(parts)
class InternedData(object):
def __init__(self):
self.event_category = None
self.legacy_event_name = None
def encode(self):
parts = []
if self.event_category is not None:
tag = encoder.TagBytes(1, wire_format.WIRETYPE_LENGTH_DELIMITED)
data = self.event_category.encode()
length = encoder._VarintBytes(len(data))
parts += [tag, length, data]
if self.legacy_event_name is not None:
tag = encoder.TagBytes(2, wire_format.WIRETYPE_LENGTH_DELIMITED)
data = self.legacy_event_name.encode()
length = encoder._VarintBytes(len(data))
parts += [tag, length, data]
return b"".join(parts)
class EventCategory(object):
def __init__(self):
self.iid = None
self.name = None
def encode(self):
if (self.iid is None or self.name is None):
raise RuntimeError("Missing mandatory fields.")
parts = []
writer = encoder.UInt32Encoder(1, False, False)
writer(parts.append, self.iid)
writer = encoder.StringEncoder(2, False, False)
writer(parts.append, self.name)
return b"".join(parts)
LegacyEventName = EventCategory
class ThreadDescriptor(object):
def __init__(self):
self.pid = None
self.tid = None
self.reference_timestamp_us = None
def encode(self):
if (self.pid is None or self.tid is None or
self.reference_timestamp_us is None):
raise RuntimeError("Missing mandatory fields.")
parts = []
writer = encoder.UInt32Encoder(1, False, False)
writer(parts.append, self.pid)
writer = encoder.UInt32Encoder(2, False, False)
writer(parts.append, self.tid)
writer = encoder.Int64Encoder(6, False, False)
writer(parts.append, self.reference_timestamp_us)
return b"".join(parts)
class TrackEvent(object):
def __init__(self):
self.timestamp_absolute_us = None
self.timestamp_delta_us = None
self.legacy_event = None
self.category_iids = None
def encode(self):
parts = []
if self.timestamp_delta_us is not None:
writer = encoder.Int64Encoder(1, False, False)
writer(parts.append, self.timestamp_delta_us)
if self.category_iids is not None:
writer = encoder.UInt32Encoder(3, is_repeated=True, is_packed=False)
writer(parts.append, self.category_iids)
if self.legacy_event is not None:
tag = encoder.TagBytes(6, wire_format.WIRETYPE_LENGTH_DELIMITED)
data = self.legacy_event.encode()
length = encoder._VarintBytes(len(data))
parts += [tag, length, data]
if self.timestamp_absolute_us is not None:
writer = encoder.Int64Encoder(16, False, False)
writer(parts.append, self.timestamp_absolute_us)
return b"".join(parts)
class LegacyEvent(object):
def __init__(self):
self.phase = None
self.name_iid = None
def encode(self):
parts = []
if self.name_iid is not None:
writer = encoder.UInt32Encoder(1, False, False)
writer(parts.append, self.name_iid)
if self.phase is not None:
writer = encoder.Int32Encoder(2, False, False)
writer(parts.append, self.phase)
return b"".join(parts)
class ChromeBenchmarkMetadata(object):
def __init__(self):
self.benchmark_start_time_us = None
self.story_run_time_us = None
self.benchmark_name = None
self.benchmark_description = None
self.story_name = None
self.story_tags = None
self.story_run_index = None
self.label = None
self.had_failures = None
def encode(self):
parts = []
if self.benchmark_start_time_us is not None:
writer = encoder.Int64Encoder(1, False, False)
writer(parts.append, self.benchmark_start_time_us)
if self.story_run_time_us is not None:
writer = encoder.Int64Encoder(2, False, False)
writer(parts.append, self.story_run_time_us)
if self.benchmark_name is not None:
writer = encoder.StringEncoder(3, False, False)
writer(parts.append, self.benchmark_name)
if self.benchmark_description is not None:
writer = encoder.StringEncoder(4, False, False)
writer(parts.append, self.benchmark_description)
if self.label is not None:
writer = encoder.StringEncoder(5, False, False)
writer(parts.append, self.label)
if self.story_name is not None:
writer = encoder.StringEncoder(6, False, False)
writer(parts.append, self.story_name)
if self.story_tags is not None:
writer = encoder.StringEncoder(7, is_repeated=True, is_packed=False)
writer(parts.append, self.story_tags)
if self.story_run_index is not None:
writer = encoder.Int32Encoder(8, False, False)
writer(parts.append, self.story_run_index)
if self.had_failures is not None:
writer = encoder.BoolEncoder(9, False, False)
writer(parts.append, self.had_failures)
return b"".join(parts)
def write_trace_packet(output, trace_packet):
tag = encoder.TagBytes(1, wire_format.WIRETYPE_LENGTH_DELIMITED)
output.write(tag)
binary_data = trace_packet.encode()
encoder._EncodeVarint(output.write, len(binary_data))
output.write(binary_data)
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