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80 lines
2.6 KiB
80 lines
2.6 KiB
//
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// Copyright (C) 2021 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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//
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//! Trace provider backed by ARM Coresight ETM, using simpleperf tool.
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use anyhow::{anyhow, Result};
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use std::fs::{read_dir, remove_file};
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use std::path::{Path, PathBuf};
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use std::time::Duration;
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use trace_provider::TraceProvider;
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use crate::trace_provider;
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static ETM_TRACEFILE_EXTENSION: &str = "etmtrace";
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static ETM_PROFILE_EXTENSION: &str = "data";
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pub struct SimpleperfEtmTraceProvider {}
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impl TraceProvider for SimpleperfEtmTraceProvider {
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fn get_name(&self) -> &'static str {
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"simpleperf_etm"
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}
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fn trace(&self, trace_dir: &Path, tag: &str, sampling_period: &Duration) {
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let mut trace_file = PathBuf::from(trace_dir);
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trace_file.push(trace_provider::construct_file_name(tag));
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trace_file.set_extension(ETM_TRACEFILE_EXTENSION);
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simpleperf_profcollect::record(
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&trace_file,
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sampling_period,
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simpleperf_profcollect::RecordScope::BOTH,
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);
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}
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fn process(&self, trace_dir: &Path, profile_dir: &Path) -> Result<()> {
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read_dir(trace_dir)?
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.filter_map(|e| e.ok())
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.map(|e| e.path())
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.filter(|e| {
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e.is_file()
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&& e.extension()
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.and_then(|f| f.to_str())
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.filter(|ext| ext == &ETM_TRACEFILE_EXTENSION)
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.is_some()
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})
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.try_for_each(|trace_file| -> Result<()> {
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let mut profile_file = PathBuf::from(profile_dir);
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profile_file.push(
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trace_file
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.file_name()
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.ok_or_else(|| anyhow!("Malformed trace path: {}", trace_file.display()))?,
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);
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profile_file.set_extension(ETM_PROFILE_EXTENSION);
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simpleperf_profcollect::process(&trace_file, &profile_file);
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remove_file(&trace_file)?;
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Ok(())
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})
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}
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}
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impl SimpleperfEtmTraceProvider {
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pub fn supported() -> bool {
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simpleperf_profcollect::has_support()
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}
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}
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