forked from mirrors/gecko-dev
9a3cdc6d7c
<!-- Please describe your changes on the following line: --> Updates to fix the labels in the rendered traces, and some other tiny stuff. r? @jdm --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [x] `./mach test-tidy` does not report any errors <!-- Either: --> - [X] There are tests for these changes Source-Repo: https://github.com/servo/servo Source-Revision: 64841090253992440b66ca12020e1125f0763cb0 --HG-- extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear extra : subtree_revision : aa83b46529f305c7a01086d6251c2b0deb661efc
84 lines
2.5 KiB
Rust
84 lines
2.5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! A module for writing time profiler traces out to a self contained HTML file.
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use profile_traits::time::{ProfilerCategory, TimerMetadata};
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use serde_json;
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use std::fs;
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use std::io::{self, Write};
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use std::path;
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/// An RAII class for writing the HTML trace dump.
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#[derive(Debug)]
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pub struct TraceDump {
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file: fs::File,
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}
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#[derive(Debug, Serialize)]
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struct TraceEntry {
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category: ProfilerCategory,
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metadata: Option<TimerMetadata>,
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#[serde(rename = "startTime")]
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start_time: u64,
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#[serde(rename = "endTime")]
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end_time: u64,
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#[serde(rename = "startEnergy")]
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start_energy: u64,
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#[serde(rename = "endEnergy")]
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end_energy: u64,
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}
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impl TraceDump {
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/// Create a new TraceDump and write the prologue of the HTML file out to
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/// disk.
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pub fn new<P>(trace_file_path: P) -> io::Result<TraceDump>
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where P: AsRef<path::Path>
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{
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let mut file = fs::File::create(trace_file_path)?;
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write_prologue(&mut file)?;
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Ok(TraceDump { file: file })
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}
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/// Write one trace to the trace dump file.
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pub fn write_one(&mut self,
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category: &(ProfilerCategory, Option<TimerMetadata>),
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time: (u64, u64),
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energy: (u64, u64)) {
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let entry = TraceEntry {
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category: category.0,
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metadata: category.1.clone(),
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start_time: time.0,
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end_time: time.1,
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start_energy: energy.0,
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end_energy: energy.1,
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};
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serde_json::to_writer(&mut self.file, &entry).unwrap();
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writeln!(&mut self.file, ",").unwrap();
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}
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}
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impl Drop for TraceDump {
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/// Write the epilogue of the trace dump HTML file out to disk on
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/// destruction.
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fn drop(&mut self) {
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write_epilogue(&mut self.file).unwrap();
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}
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}
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fn write_prologue(file: &mut fs::File) -> io::Result<()> {
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writeln!(file, "{}", include_str!("./trace-dump-prologue-1.html"))?;
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writeln!(file, "{}", include_str!("./trace-dump.css"))?;
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writeln!(file, "{}", include_str!("./trace-dump-prologue-2.html"))
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}
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fn write_epilogue(file: &mut fs::File) -> io::Result<()> {
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writeln!(file, "{}", include_str!("./trace-dump-epilogue-1.html"))?;
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writeln!(file, "{}", include_str!("./trace-dump.js"))?;
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writeln!(file, "{}", include_str!("./trace-dump-epilogue-2.html"))
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}
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