| #!/usr/bin/env python3 |
| # Copyright (C) 2019 The Android Open Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| # This synthetic trace tests a short lived process which is forked, performs |
| # a rename (to simulate an exec) then dies before the /proc scraper finds the |
| # real process name |
| |
| from os import sys, path |
| |
| from synth_common import CLONE_THREAD |
| import synth_common |
| |
| trace = synth_common.create_trace() |
| |
| # Create a parent process which will be forked below. |
| trace.add_packet(ts=1) |
| trace.add_process(10, 0, "parent") |
| trace.add_process(11, 0, "short_lived") |
| |
| # Make the short lived thread emit a begin/end pair then exit. |
| trace.add_ftrace_packet(0) |
| trace.add_atrace_begin(ts=10, tid=11, pid=11, buf='test') |
| trace.add_atrace_end(ts=11, tid=11, pid=11) |
| trace.add_process_free(ts=12, tid=11, comm='short_lived', prio=0) |
| |
| # Now, reuse tid 11 and emit a begin on the parent and an end on the child. |
| # This is an abuse of sync events (which technically should always be associated |
| # with a single thread) but this happens all the time in places like ART so |
| # we should support it. |
| trace.add_ftrace_packet(0) |
| trace.add_newtask( |
| ts=15, tid=10, new_tid=11, new_comm='child', flags=CLONE_THREAD) |
| trace.add_rename( |
| ts=17, tid=11, old_comm='child', new_comm='true_name', oom_score_adj=1000) |
| trace.add_atrace_begin(ts=18, tid=10, pid=10, buf='test') |
| trace.add_atrace_end(ts=19, tid=11, pid=10) |
| |
| sys.stdout.buffer.write(trace.trace.SerializeToString()) |
