mirror of
https://github.com/denoland/deno.git
synced 2024-12-21 06:44:45 -05:00
834 lines
23 KiB
Rust
834 lines
23 KiB
Rust
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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//
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// Forked from https://github.com/demurgos/v8-coverage/tree/d0ca18da8740198681e0bc68971b0a6cdb11db3e/rust
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// Copyright 2021 Charles Samborski. All rights reserved. MIT license.
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use super::range_tree::RangeTree;
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use super::range_tree::RangeTreeArena;
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use crate::cdp;
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use std::collections::BTreeMap;
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use std::collections::BTreeSet;
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use std::collections::HashMap;
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use std::iter::Peekable;
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#[derive(Eq, PartialEq, Clone, Debug)]
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pub struct ProcessCoverage {
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pub result: Vec<cdp::ScriptCoverage>,
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}
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pub fn merge_processes(
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mut processes: Vec<ProcessCoverage>,
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) -> Option<ProcessCoverage> {
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if processes.len() <= 1 {
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return processes.pop();
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}
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let mut url_to_scripts: BTreeMap<String, Vec<cdp::ScriptCoverage>> =
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BTreeMap::new();
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for process_cov in processes {
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for script_cov in process_cov.result {
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url_to_scripts
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.entry(script_cov.url.clone())
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.or_default()
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.push(script_cov);
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}
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}
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let result: Vec<cdp::ScriptCoverage> = url_to_scripts
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.into_iter()
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.enumerate()
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.map(|(script_id, (_, scripts))| (script_id, scripts))
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.map(|(script_id, scripts)| {
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let mut merged: cdp::ScriptCoverage =
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merge_scripts(scripts.to_vec()).unwrap();
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merged.script_id = script_id.to_string();
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merged
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})
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.collect();
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Some(ProcessCoverage { result })
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}
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pub fn merge_scripts(
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mut scripts: Vec<cdp::ScriptCoverage>,
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) -> Option<cdp::ScriptCoverage> {
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if scripts.len() <= 1 {
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return scripts.pop();
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}
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let (script_id, url) = {
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let first: &cdp::ScriptCoverage = &scripts[0];
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(first.script_id.clone(), first.url.clone())
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};
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let mut range_to_funcs: BTreeMap<CharRange, Vec<cdp::FunctionCoverage>> =
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BTreeMap::new();
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for script_cov in scripts {
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for func_cov in script_cov.functions {
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let root_range = {
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let root_range_cov: &cdp::CoverageRange = &func_cov.ranges[0];
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CharRange {
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start: root_range_cov.start_char_offset,
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end: root_range_cov.end_char_offset,
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}
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};
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range_to_funcs.entry(root_range).or_default().push(func_cov);
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}
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}
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let functions: Vec<cdp::FunctionCoverage> = range_to_funcs
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.into_values()
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.map(|funcs| merge_functions(funcs).unwrap())
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.collect();
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Some(cdp::ScriptCoverage {
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script_id,
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url,
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functions,
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})
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}
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#[derive(Eq, PartialEq, Hash, Copy, Clone, Debug)]
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struct CharRange {
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start: usize,
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end: usize,
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}
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impl Ord for CharRange {
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fn cmp(&self, other: &Self) -> ::std::cmp::Ordering {
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if self.start != other.start {
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self.start.cmp(&other.start)
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} else {
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other.end.cmp(&self.end)
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}
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}
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}
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impl PartialOrd for CharRange {
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fn partial_cmp(&self, other: &Self) -> Option<::std::cmp::Ordering> {
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Some(self.cmp(other))
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}
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}
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pub fn merge_functions(
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mut funcs: Vec<cdp::FunctionCoverage>,
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) -> Option<cdp::FunctionCoverage> {
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if funcs.len() <= 1 {
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return funcs.pop();
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}
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let function_name = funcs[0].function_name.clone();
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let rta_capacity: usize =
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funcs.iter().fold(0, |acc, func| acc + func.ranges.len());
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let rta = RangeTreeArena::with_capacity(rta_capacity);
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let mut trees: Vec<&mut RangeTree> = Vec::new();
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for func in funcs {
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if let Some(tree) = RangeTree::from_sorted_ranges(&rta, &func.ranges) {
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trees.push(tree);
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}
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}
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let merged = RangeTree::normalize(merge_range_trees(&rta, trees).unwrap());
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let ranges = merged.to_ranges();
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let is_block_coverage: bool = !(ranges.len() == 1 && ranges[0].count == 0);
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Some(cdp::FunctionCoverage {
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function_name,
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ranges,
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is_block_coverage,
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})
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}
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fn merge_range_trees<'a>(
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rta: &'a RangeTreeArena<'a>,
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mut trees: Vec<&'a mut RangeTree<'a>>,
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) -> Option<&'a mut RangeTree<'a>> {
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if trees.len() <= 1 {
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return trees.pop();
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}
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let (start, end) = {
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let first = &trees[0];
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(first.start, first.end)
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};
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let delta: i64 = trees.iter().fold(0, |acc, tree| acc + tree.delta);
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let children = merge_range_tree_children(rta, trees);
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Some(rta.alloc(RangeTree::new(start, end, delta, children)))
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}
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struct StartEvent<'a> {
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offset: usize,
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trees: Vec<(usize, &'a mut RangeTree<'a>)>,
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}
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fn into_start_events<'a>(trees: Vec<&'a mut RangeTree<'a>>) -> Vec<StartEvent> {
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let mut result: BTreeMap<usize, Vec<(usize, &'a mut RangeTree<'a>)>> =
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BTreeMap::new();
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for (parent_index, tree) in trees.into_iter().enumerate() {
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for child in tree.children.drain(..) {
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result
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.entry(child.start)
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.or_default()
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.push((parent_index, child));
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}
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}
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result
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.into_iter()
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.map(|(offset, trees)| StartEvent { offset, trees })
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.collect()
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}
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struct StartEventQueue<'a> {
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pending: Option<StartEvent<'a>>,
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queue: Peekable<::std::vec::IntoIter<StartEvent<'a>>>,
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}
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impl<'a> StartEventQueue<'a> {
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pub fn new(queue: Vec<StartEvent<'a>>) -> StartEventQueue<'a> {
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StartEventQueue {
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pending: None,
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queue: queue.into_iter().peekable(),
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}
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}
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pub fn set_pending_offset(&mut self, offset: usize) {
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self.pending = Some(StartEvent {
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offset,
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trees: Vec::new(),
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});
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}
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pub fn push_pending_tree(&mut self, tree: (usize, &'a mut RangeTree<'a>)) {
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self.pending = self.pending.take().map(|mut start_event| {
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start_event.trees.push(tree);
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start_event
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});
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}
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}
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impl<'a> Iterator for StartEventQueue<'a> {
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type Item = StartEvent<'a>;
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fn next(&mut self) -> Option<<Self as Iterator>::Item> {
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let pending_offset: Option<usize> = match &self.pending {
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Some(ref start_event) if !start_event.trees.is_empty() => {
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Some(start_event.offset)
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}
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_ => None,
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};
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match pending_offset {
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Some(pending_offset) => {
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let queue_offset =
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self.queue.peek().map(|start_event| start_event.offset);
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match queue_offset {
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None => self.pending.take(),
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Some(queue_offset) => {
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if pending_offset < queue_offset {
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self.pending.take()
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} else {
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let mut result = self.queue.next().unwrap();
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if pending_offset == queue_offset {
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let pending_trees = self.pending.take().unwrap().trees;
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result.trees.extend(pending_trees)
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}
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Some(result)
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}
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}
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}
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}
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None => self.queue.next(),
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}
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}
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}
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fn merge_range_tree_children<'a>(
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rta: &'a RangeTreeArena<'a>,
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parent_trees: Vec<&'a mut RangeTree<'a>>,
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) -> Vec<&'a mut RangeTree<'a>> {
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let mut flat_children: Vec<Vec<&'a mut RangeTree<'a>>> =
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Vec::with_capacity(parent_trees.len());
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let mut wrapped_children: Vec<Vec<&'a mut RangeTree<'a>>> =
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Vec::with_capacity(parent_trees.len());
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let mut open_range: Option<CharRange> = None;
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for _parent_tree in parent_trees.iter() {
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flat_children.push(Vec::new());
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wrapped_children.push(Vec::new());
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}
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let mut start_event_queue =
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StartEventQueue::new(into_start_events(parent_trees));
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let mut parent_to_nested: HashMap<usize, Vec<&'a mut RangeTree<'a>>> =
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HashMap::new();
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while let Some(event) = start_event_queue.next() {
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open_range = if let Some(open_range) = open_range {
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if open_range.end <= event.offset {
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for (parent_index, nested) in parent_to_nested {
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wrapped_children[parent_index].push(rta.alloc(RangeTree::new(
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open_range.start,
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open_range.end,
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0,
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nested,
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)));
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}
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parent_to_nested = HashMap::new();
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None
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} else {
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Some(open_range)
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}
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} else {
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None
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};
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match open_range {
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Some(open_range) => {
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for (parent_index, tree) in event.trees {
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let child = if tree.end > open_range.end {
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let (left, right) = RangeTree::split(rta, tree, open_range.end);
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start_event_queue.push_pending_tree((parent_index, right));
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left
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} else {
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tree
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};
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parent_to_nested
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.entry(parent_index)
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.or_default()
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.push(child);
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}
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}
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None => {
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let mut open_range_end: usize = event.offset + 1;
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for (_, ref tree) in &event.trees {
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open_range_end = if tree.end > open_range_end {
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tree.end
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} else {
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open_range_end
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};
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}
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for (parent_index, tree) in event.trees {
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if tree.end == open_range_end {
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flat_children[parent_index].push(tree);
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continue;
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}
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parent_to_nested.entry(parent_index).or_default().push(tree);
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}
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start_event_queue.set_pending_offset(open_range_end);
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open_range = Some(CharRange {
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start: event.offset,
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end: open_range_end,
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});
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}
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}
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}
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if let Some(open_range) = open_range {
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for (parent_index, nested) in parent_to_nested {
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wrapped_children[parent_index].push(rta.alloc(RangeTree::new(
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open_range.start,
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open_range.end,
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0,
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nested,
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)));
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}
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}
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let child_forests: Vec<Vec<&'a mut RangeTree<'a>>> = flat_children
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.into_iter()
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.zip(wrapped_children)
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.map(|(flat, wrapped)| merge_children_lists(flat, wrapped))
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.collect();
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let events = get_child_events_from_forests(&child_forests);
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let mut child_forests: Vec<
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Peekable<::std::vec::IntoIter<&'a mut RangeTree<'a>>>,
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> = child_forests
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.into_iter()
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.map(|forest| forest.into_iter().peekable())
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.collect();
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let mut result: Vec<&'a mut RangeTree<'a>> = Vec::new();
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for event in events.iter() {
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let mut matching_trees: Vec<&'a mut RangeTree<'a>> = Vec::new();
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for children in child_forests.iter_mut() {
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let next_tree: Option<&'a mut RangeTree<'a>> = {
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if children
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.peek()
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.map(|tree| tree.start == *event)
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.unwrap_or(false)
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{
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children.next()
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} else {
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None
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}
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};
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if let Some(next_tree) = next_tree {
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matching_trees.push(next_tree);
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}
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}
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if let Some(merged) = merge_range_trees(rta, matching_trees) {
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result.push(merged);
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}
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}
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result
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}
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fn get_child_events_from_forests<'a>(
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forests: &[Vec<&'a mut RangeTree<'a>>],
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) -> BTreeSet<usize> {
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let mut event_set: BTreeSet<usize> = BTreeSet::new();
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for forest in forests {
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for tree in forest {
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event_set.insert(tree.start);
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event_set.insert(tree.end);
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}
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}
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event_set
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}
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// TODO: itertools?
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// https://play.integer32.com/?gist=ad2cd20d628e647a5dbdd82e68a15cb6&version=stable&mode=debug&edition=2015
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fn merge_children_lists<'a>(
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a: Vec<&'a mut RangeTree<'a>>,
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b: Vec<&'a mut RangeTree<'a>>,
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) -> Vec<&'a mut RangeTree<'a>> {
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let mut merged: Vec<&'a mut RangeTree<'a>> = Vec::new();
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let mut a = a.into_iter();
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let mut b = b.into_iter();
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let mut next_a = a.next();
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let mut next_b = b.next();
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loop {
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match (next_a, next_b) {
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(Some(tree_a), Some(tree_b)) => {
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if tree_a.start < tree_b.start {
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merged.push(tree_a);
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next_a = a.next();
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next_b = Some(tree_b);
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} else {
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merged.push(tree_b);
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next_a = Some(tree_a);
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next_b = b.next();
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}
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}
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(Some(tree_a), None) => {
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merged.push(tree_a);
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merged.extend(a);
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break;
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}
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(None, Some(tree_b)) => {
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merged.push(tree_b);
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merged.extend(b);
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break;
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}
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(None, None) => break,
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}
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}
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merged
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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// use test_generator::test_resources;
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#[test]
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fn empty() {
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let inputs: Vec<ProcessCoverage> = Vec::new();
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let expected: Option<ProcessCoverage> = None;
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assert_eq!(merge_processes(inputs), expected);
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}
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#[test]
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fn two_flat_trees() {
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let inputs: Vec<ProcessCoverage> = vec![
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ProcessCoverage {
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result: vec![cdp::ScriptCoverage {
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script_id: String::from("0"),
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url: String::from("/lib.js"),
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functions: vec![cdp::FunctionCoverage {
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function_name: String::from("lib"),
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is_block_coverage: true,
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ranges: vec![cdp::CoverageRange {
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start_char_offset: 0,
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end_char_offset: 9,
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count: 1,
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}],
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}],
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}],
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},
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ProcessCoverage {
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result: vec![cdp::ScriptCoverage {
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script_id: String::from("0"),
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url: String::from("/lib.js"),
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functions: vec![cdp::FunctionCoverage {
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function_name: String::from("lib"),
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is_block_coverage: true,
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ranges: vec![cdp::CoverageRange {
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start_char_offset: 0,
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end_char_offset: 9,
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count: 2,
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}],
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}],
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}],
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},
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];
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let expected: Option<ProcessCoverage> = Some(ProcessCoverage {
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result: vec![cdp::ScriptCoverage {
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script_id: String::from("0"),
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url: String::from("/lib.js"),
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functions: vec![cdp::FunctionCoverage {
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function_name: String::from("lib"),
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is_block_coverage: true,
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ranges: vec![cdp::CoverageRange {
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start_char_offset: 0,
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end_char_offset: 9,
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count: 3,
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}],
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}],
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}],
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});
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assert_eq!(merge_processes(inputs), expected);
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}
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#[test]
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fn two_trees_with_matching_children() {
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let inputs: Vec<ProcessCoverage> = vec![
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ProcessCoverage {
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result: vec![cdp::ScriptCoverage {
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script_id: String::from("0"),
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url: String::from("/lib.js"),
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functions: vec![cdp::FunctionCoverage {
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function_name: String::from("lib"),
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is_block_coverage: true,
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ranges: vec![
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cdp::CoverageRange {
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start_char_offset: 0,
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end_char_offset: 9,
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count: 10,
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},
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cdp::CoverageRange {
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start_char_offset: 3,
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end_char_offset: 6,
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count: 1,
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},
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],
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}],
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}],
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},
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ProcessCoverage {
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result: vec![cdp::ScriptCoverage {
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script_id: String::from("0"),
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url: String::from("/lib.js"),
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functions: vec![cdp::FunctionCoverage {
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function_name: String::from("lib"),
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is_block_coverage: true,
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ranges: vec![
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cdp::CoverageRange {
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|
start_char_offset: 0,
|
|
end_char_offset: 9,
|
|
count: 20,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 3,
|
|
end_char_offset: 6,
|
|
count: 2,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
},
|
|
];
|
|
let expected: Option<ProcessCoverage> = Some(ProcessCoverage {
|
|
result: vec![cdp::ScriptCoverage {
|
|
script_id: String::from("0"),
|
|
url: String::from("/lib.js"),
|
|
functions: vec![cdp::FunctionCoverage {
|
|
function_name: String::from("lib"),
|
|
is_block_coverage: true,
|
|
ranges: vec![
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 9,
|
|
count: 30,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 3,
|
|
end_char_offset: 6,
|
|
count: 3,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
});
|
|
|
|
assert_eq!(merge_processes(inputs), expected);
|
|
}
|
|
|
|
#[test]
|
|
fn two_trees_with_partially_overlapping_children() {
|
|
let inputs: Vec<ProcessCoverage> = vec![
|
|
ProcessCoverage {
|
|
result: vec![cdp::ScriptCoverage {
|
|
script_id: String::from("0"),
|
|
url: String::from("/lib.js"),
|
|
functions: vec![cdp::FunctionCoverage {
|
|
function_name: String::from("lib"),
|
|
is_block_coverage: true,
|
|
ranges: vec![
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 9,
|
|
count: 10,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 2,
|
|
end_char_offset: 5,
|
|
count: 1,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
},
|
|
ProcessCoverage {
|
|
result: vec![cdp::ScriptCoverage {
|
|
script_id: String::from("0"),
|
|
url: String::from("/lib.js"),
|
|
functions: vec![cdp::FunctionCoverage {
|
|
function_name: String::from("lib"),
|
|
is_block_coverage: true,
|
|
ranges: vec![
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 9,
|
|
count: 20,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 4,
|
|
end_char_offset: 7,
|
|
count: 2,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
},
|
|
];
|
|
let expected: Option<ProcessCoverage> = Some(ProcessCoverage {
|
|
result: vec![cdp::ScriptCoverage {
|
|
script_id: String::from("0"),
|
|
url: String::from("/lib.js"),
|
|
functions: vec![cdp::FunctionCoverage {
|
|
function_name: String::from("lib"),
|
|
is_block_coverage: true,
|
|
ranges: vec![
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 9,
|
|
count: 30,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 2,
|
|
end_char_offset: 5,
|
|
count: 21,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 4,
|
|
end_char_offset: 5,
|
|
count: 3,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 5,
|
|
end_char_offset: 7,
|
|
count: 12,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
});
|
|
|
|
assert_eq!(merge_processes(inputs), expected);
|
|
}
|
|
|
|
#[test]
|
|
fn two_trees_with_with_complementary_children_summing_to_the_same_count() {
|
|
let inputs: Vec<ProcessCoverage> = vec![
|
|
ProcessCoverage {
|
|
result: vec![cdp::ScriptCoverage {
|
|
script_id: String::from("0"),
|
|
url: String::from("/lib.js"),
|
|
functions: vec![cdp::FunctionCoverage {
|
|
function_name: String::from("lib"),
|
|
is_block_coverage: true,
|
|
ranges: vec![
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 9,
|
|
count: 1,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 1,
|
|
end_char_offset: 8,
|
|
count: 6,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 1,
|
|
end_char_offset: 5,
|
|
count: 5,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 5,
|
|
end_char_offset: 8,
|
|
count: 7,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
},
|
|
ProcessCoverage {
|
|
result: vec![cdp::ScriptCoverage {
|
|
script_id: String::from("0"),
|
|
url: String::from("/lib.js"),
|
|
functions: vec![cdp::FunctionCoverage {
|
|
function_name: String::from("lib"),
|
|
is_block_coverage: true,
|
|
ranges: vec![
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 9,
|
|
count: 4,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 1,
|
|
end_char_offset: 8,
|
|
count: 8,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 1,
|
|
end_char_offset: 5,
|
|
count: 9,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 5,
|
|
end_char_offset: 8,
|
|
count: 7,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
},
|
|
];
|
|
let expected: Option<ProcessCoverage> = Some(ProcessCoverage {
|
|
result: vec![cdp::ScriptCoverage {
|
|
script_id: String::from("0"),
|
|
url: String::from("/lib.js"),
|
|
functions: vec![cdp::FunctionCoverage {
|
|
function_name: String::from("lib"),
|
|
is_block_coverage: true,
|
|
ranges: vec![
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 9,
|
|
count: 5,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 1,
|
|
end_char_offset: 8,
|
|
count: 14,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
});
|
|
|
|
assert_eq!(merge_processes(inputs), expected);
|
|
}
|
|
|
|
#[test]
|
|
fn merges_a_similar_sliding_chain_a_bc() {
|
|
let inputs: Vec<ProcessCoverage> = vec![
|
|
ProcessCoverage {
|
|
result: vec![cdp::ScriptCoverage {
|
|
script_id: String::from("0"),
|
|
url: String::from("/lib.js"),
|
|
functions: vec![cdp::FunctionCoverage {
|
|
function_name: String::from("lib"),
|
|
is_block_coverage: true,
|
|
ranges: vec![
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 7,
|
|
count: 10,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 4,
|
|
count: 1,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
},
|
|
ProcessCoverage {
|
|
result: vec![cdp::ScriptCoverage {
|
|
script_id: String::from("0"),
|
|
url: String::from("/lib.js"),
|
|
functions: vec![cdp::FunctionCoverage {
|
|
function_name: String::from("lib"),
|
|
is_block_coverage: true,
|
|
ranges: vec![
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 7,
|
|
count: 20,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 1,
|
|
end_char_offset: 6,
|
|
count: 11,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 2,
|
|
end_char_offset: 5,
|
|
count: 2,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
},
|
|
];
|
|
let expected: Option<ProcessCoverage> = Some(ProcessCoverage {
|
|
result: vec![cdp::ScriptCoverage {
|
|
script_id: String::from("0"),
|
|
url: String::from("/lib.js"),
|
|
functions: vec![cdp::FunctionCoverage {
|
|
function_name: String::from("lib"),
|
|
is_block_coverage: true,
|
|
ranges: vec![
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 7,
|
|
count: 30,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 0,
|
|
end_char_offset: 6,
|
|
count: 21,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 1,
|
|
end_char_offset: 5,
|
|
count: 12,
|
|
},
|
|
cdp::CoverageRange {
|
|
start_char_offset: 2,
|
|
end_char_offset: 4,
|
|
count: 3,
|
|
},
|
|
],
|
|
}],
|
|
}],
|
|
});
|
|
|
|
assert_eq!(merge_processes(inputs), expected);
|
|
}
|
|
}
|