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| /* | |
| Copyright (c) 2017 The swc Project Developers | |
| Permission is hereby granted, free of charge, to any | |
| person obtaining a copy of this software and associated | |
| documentation files (the "Software"), to deal in the | |
| Software without restriction, including without | |
| limitation the rights to use, copy, modify, merge, | |
| publish, distribute, sublicense, and/or sell copies of | |
| the Software, and to permit persons to whom the Software | |
| is furnished to do so, subject to the following | |
| conditions: | |
| The above copyright notice and this permission notice | |
| shall be included in all copies or substantial portions | |
| of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF | |
| ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED | |
| TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A | |
| PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT | |
| SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY | |
| CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | |
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR | |
| IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
| DEALINGS IN THE SOFTWARE. | |
| */ | |
| use std::{cell::RefCell, env, path::PathBuf}; | |
| use anyhow::anyhow; | |
| use napi::bindgen_prelude::{External, Status}; | |
| use tracing_chrome::{ChromeLayerBuilder, FlushGuard}; | |
| use tracing_subscriber::{Layer, filter, layer::SubscriberExt, util::SubscriberInitExt}; | |
| pub fn get_target_triple() -> &'static str { | |
| env!("VERGEN_CARGO_TARGET_TRIPLE") | |
| } | |
| pub trait MapErr<T>: Into<Result<T, anyhow::Error>> { | |
| fn convert_err(self) -> napi::Result<T> { | |
| self.into() | |
| .map_err(|err| napi::Error::new(Status::GenericFailure, format!("{err:?}"))) | |
| } | |
| } | |
| impl<T> MapErr<T> for Result<T, anyhow::Error> {} | |
| /// An opaque type potentially wrapping a [`dhat::Profiler`] instance. If we | |
| /// were not compiled with dhat support, this is an empty struct. | |
| pub struct DhatProfilerGuard(dhat::Profiler); | |
| /// An opaque type potentially wrapping a [`dhat::Profiler`] instance. If we | |
| /// were not compiled with dhat support, this is an empty struct. | |
| /// | |
| /// [`dhat::Profiler`]: https://docs.rs/dhat/latest/dhat/struct.Profiler.html | |
| pub struct DhatProfilerGuard; | |
| impl DhatProfilerGuard { | |
| /// Constructs an instance if we were compiled with dhat support. | |
| pub fn try_init() -> Option<Self> { | |
| { | |
| println!("[dhat-heap]: Initializing heap profiler"); | |
| Some(Self(dhat::Profiler::new_heap())) | |
| } | |
| { | |
| println!("[dhat-ad-hoc]: Initializing ad-hoc profiler"); | |
| Some(Self(dhat::Profiler::new_ad_hoc())) | |
| } | |
| { | |
| None | |
| } | |
| } | |
| } | |
| impl Drop for DhatProfilerGuard { | |
| fn drop(&mut self) { | |
| println!("[dhat]: Teardown profiler"); | |
| } | |
| } | |
| /// Initialize tracing subscriber to emit traces. This configures subscribers | |
| /// for Trace Event Format <https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview>. | |
| pub fn init_custom_trace_subscriber( | |
| trace_out_file_path: Option<String>, | |
| ) -> napi::Result<External<RefCell<Option<FlushGuard>>>> { | |
| let trace_out_file_path = trace_out_file_path.map(PathBuf::from); | |
| let mut layer = ChromeLayerBuilder::new().include_args(true); | |
| if let Some(trace_out_file) = trace_out_file_path { | |
| let dir = trace_out_file | |
| .parent() | |
| .ok_or_else(|| anyhow!("Not able to find path to the trace output")) | |
| .convert_err()?; | |
| std::fs::create_dir_all(dir)?; | |
| layer = layer.file(trace_out_file); | |
| } | |
| let (chrome_layer, guard) = layer.build(); | |
| tracing_subscriber::registry() | |
| .with(chrome_layer.with_filter(filter::filter_fn(|metadata| { | |
| !metadata.target().contains("cranelift") && !metadata.name().contains("log ") | |
| }))) | |
| .try_init() | |
| .expect("Failed to register tracing subscriber"); | |
| let guard_cell = RefCell::new(Some(guard)); | |
| Ok(External::new(guard_cell)) | |
| } | |
| /// Teardown currently running tracing subscriber to flush out remaining traces. | |
| /// This should be called when parent node.js process exits, otherwise generated | |
| /// trace may drop traces in the buffer. | |
| pub fn teardown_trace_subscriber(guard_external: External<RefCell<Option<FlushGuard>>>) { | |
| let guard_cell = &*guard_external; | |
| if let Some(guard) = guard_cell.take() { | |
| drop(guard); | |
| } | |
| } | |