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