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# firefox-gecko-converter.py - Convert perf record output to Firefox's gecko profile format
# SPDX-License-Identifier: GPL-2.0
#
# The script converts perf.data to Gecko Profile Format,
# which can be read by https://profiler.firefox.com/.
#
# Usage:
#
# perf record -a -g -F 99 sleep 60
# perf script report gecko > output.json
import os
import sys
from typing import Dict
# Add the Perf-Trace-Util library to the Python path
sys.path.append(os.environ['PERF_EXEC_PATH'] + \
'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
from perf_trace_context import *
from Core import *
# start_time is intialiazed only once for the all event traces.
start_time = None
# Uses perf script python interface to parse each
# event and store the data in the thread builder.
def process_event(param_dict: Dict) -> None:
global start_time
global tid_to_thread
time_stamp = (param_dict['sample']['time'] // 1000) / 1000
pid = param_dict['sample']['pid']
tid = param_dict['sample']['tid']
comm = param_dict['comm']
# Start time is the time of the first sample
if not start_time:
start_time = time_stamp
# Trace_end runs at the end and will be used to aggregate
# the data into the final json object and print it out to stdout.
def trace_end() -> None:
pass
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