1#!/usr/bin/env python3 2# Copyright (C) 2019 The Android Open Source Project 3# 4# Licensed under the Apache License, Version 2.0 (the "License"); 5# you may not use this file except in compliance with the License. 6# You may obtain a copy of the License at 7# 8# http://www.apache.org/licenses/LICENSE-2.0 9# 10# Unless required by applicable law or agreed to in writing, software 11# distributed under the License is distributed on an "AS IS" BASIS, 12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13# See the License for the specific language governing permissions and 14# limitations under the License. 15 16# This synthetic trace tests a short lived process which is forked and dies 17# before the /proc scraper is able to find its true name. 18 19from os import sys, path 20 21from synth_common import CLONE_THREAD 22import synth_common 23 24trace = synth_common.create_trace() 25 26# Create a parent process which will be forked below. 27trace.add_packet(ts=1) 28trace.add_process(10, 0, "parent") 29 30# Fork off the new process and then kill it 5ns later. 31trace.add_ftrace_packet(0) 32trace.add_newtask(ts=15, tid=10, new_tid=11, new_comm='child', flags=0) 33trace.add_sched(ts=16, prev_pid=10, next_pid=11, next_comm='child') 34trace.add_process_free(ts=20, tid=11, comm='child', prio=0) 35 36sys.stdout.buffer.write(trace.trace.SerializeToString()) 37