mirror of
https://github.com/denoland/deno.git
synced 2024-12-18 13:22:55 -05:00
523 lines
15 KiB
Rust
523 lines
15 KiB
Rust
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
|
|
|
|
use std::collections::BTreeMap;
|
|
use std::collections::HashMap;
|
|
use std::io::BufReader;
|
|
use std::io::BufWriter;
|
|
use std::io::Read;
|
|
use std::io::Write;
|
|
use std::path::Path;
|
|
use std::path::PathBuf;
|
|
use std::sync::Arc;
|
|
|
|
use deno_ast::ModuleSpecifier;
|
|
use deno_core::anyhow::bail;
|
|
use deno_core::error::AnyError;
|
|
use deno_core::parking_lot::Mutex;
|
|
use deno_core::unsync::sync::AtomicFlag;
|
|
use deno_runtime::code_cache::CodeCache;
|
|
use deno_runtime::code_cache::CodeCacheType;
|
|
|
|
use crate::cache::FastInsecureHasher;
|
|
use crate::util::path::get_atomic_file_path;
|
|
use crate::worker::CliCodeCache;
|
|
|
|
enum CodeCacheStrategy {
|
|
FirstRun(FirstRunCodeCacheStrategy),
|
|
SubsequentRun(SubsequentRunCodeCacheStrategy),
|
|
}
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
|
pub struct DenoCompileCodeCacheEntry {
|
|
pub source_hash: u64,
|
|
pub data: Vec<u8>,
|
|
}
|
|
|
|
pub struct DenoCompileCodeCache {
|
|
strategy: CodeCacheStrategy,
|
|
}
|
|
|
|
impl DenoCompileCodeCache {
|
|
pub fn new(file_path: PathBuf, cache_key: u64) -> Self {
|
|
// attempt to deserialize the cache data
|
|
match deserialize(&file_path, cache_key) {
|
|
Ok(data) => {
|
|
log::debug!(
|
|
"Loaded {} code cache entries from {}",
|
|
data.len(),
|
|
file_path.display()
|
|
);
|
|
Self {
|
|
strategy: CodeCacheStrategy::SubsequentRun(
|
|
SubsequentRunCodeCacheStrategy {
|
|
is_finished: AtomicFlag::lowered(),
|
|
data: Mutex::new(data),
|
|
},
|
|
),
|
|
}
|
|
}
|
|
Err(err) => {
|
|
log::debug!(
|
|
"Failed to deserialize code cache from {}: {:#}",
|
|
file_path.display(),
|
|
err
|
|
);
|
|
Self {
|
|
strategy: CodeCacheStrategy::FirstRun(FirstRunCodeCacheStrategy {
|
|
cache_key,
|
|
file_path,
|
|
is_finished: AtomicFlag::lowered(),
|
|
data: Mutex::new(FirstRunCodeCacheData {
|
|
cache: HashMap::new(),
|
|
add_count: 0,
|
|
}),
|
|
}),
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl CodeCache for DenoCompileCodeCache {
|
|
fn get_sync(
|
|
&self,
|
|
specifier: &ModuleSpecifier,
|
|
code_cache_type: CodeCacheType,
|
|
source_hash: u64,
|
|
) -> Option<Vec<u8>> {
|
|
match &self.strategy {
|
|
CodeCacheStrategy::FirstRun(strategy) => {
|
|
if !strategy.is_finished.is_raised() {
|
|
// we keep track of how many times the cache is requested
|
|
// then serialize the cache when we get that number of
|
|
// "set" calls
|
|
strategy.data.lock().add_count += 1;
|
|
}
|
|
None
|
|
}
|
|
CodeCacheStrategy::SubsequentRun(strategy) => {
|
|
if strategy.is_finished.is_raised() {
|
|
return None;
|
|
}
|
|
strategy.take_from_cache(specifier, code_cache_type, source_hash)
|
|
}
|
|
}
|
|
}
|
|
|
|
fn set_sync(
|
|
&self,
|
|
specifier: ModuleSpecifier,
|
|
code_cache_type: CodeCacheType,
|
|
source_hash: u64,
|
|
bytes: &[u8],
|
|
) {
|
|
match &self.strategy {
|
|
CodeCacheStrategy::FirstRun(strategy) => {
|
|
if strategy.is_finished.is_raised() {
|
|
return;
|
|
}
|
|
|
|
let data_to_serialize = {
|
|
let mut data = strategy.data.lock();
|
|
data.cache.insert(
|
|
(specifier.to_string(), code_cache_type),
|
|
DenoCompileCodeCacheEntry {
|
|
source_hash,
|
|
data: bytes.to_vec(),
|
|
},
|
|
);
|
|
if data.add_count != 0 {
|
|
data.add_count -= 1;
|
|
}
|
|
if data.add_count == 0 {
|
|
// don't allow using the cache anymore
|
|
strategy.is_finished.raise();
|
|
if data.cache.is_empty() {
|
|
None
|
|
} else {
|
|
Some(std::mem::take(&mut data.cache))
|
|
}
|
|
} else {
|
|
None
|
|
}
|
|
};
|
|
if let Some(cache_data) = &data_to_serialize {
|
|
strategy.write_cache_data(cache_data);
|
|
}
|
|
}
|
|
CodeCacheStrategy::SubsequentRun(_) => {
|
|
// do nothing
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl CliCodeCache for DenoCompileCodeCache {
|
|
fn enabled(&self) -> bool {
|
|
match &self.strategy {
|
|
CodeCacheStrategy::FirstRun(strategy) => {
|
|
!strategy.is_finished.is_raised()
|
|
}
|
|
CodeCacheStrategy::SubsequentRun(strategy) => {
|
|
!strategy.is_finished.is_raised()
|
|
}
|
|
}
|
|
}
|
|
|
|
fn as_code_cache(self: Arc<Self>) -> Arc<dyn CodeCache> {
|
|
self
|
|
}
|
|
}
|
|
|
|
type CodeCacheKey = (String, CodeCacheType);
|
|
|
|
struct FirstRunCodeCacheData {
|
|
cache: HashMap<CodeCacheKey, DenoCompileCodeCacheEntry>,
|
|
add_count: usize,
|
|
}
|
|
|
|
struct FirstRunCodeCacheStrategy {
|
|
cache_key: u64,
|
|
file_path: PathBuf,
|
|
is_finished: AtomicFlag,
|
|
data: Mutex<FirstRunCodeCacheData>,
|
|
}
|
|
|
|
impl FirstRunCodeCacheStrategy {
|
|
fn write_cache_data(
|
|
&self,
|
|
cache_data: &HashMap<CodeCacheKey, DenoCompileCodeCacheEntry>,
|
|
) {
|
|
let count = cache_data.len();
|
|
let temp_file = get_atomic_file_path(&self.file_path);
|
|
match serialize(&temp_file, self.cache_key, cache_data) {
|
|
Ok(()) => {
|
|
if let Err(err) = std::fs::rename(&temp_file, &self.file_path) {
|
|
log::debug!("Failed to rename code cache: {}", err);
|
|
let _ = std::fs::remove_file(&temp_file);
|
|
} else {
|
|
log::debug!("Serialized {} code cache entries", count);
|
|
}
|
|
}
|
|
Err(err) => {
|
|
let _ = std::fs::remove_file(&temp_file);
|
|
log::debug!("Failed to serialize code cache: {}", err);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
struct SubsequentRunCodeCacheStrategy {
|
|
is_finished: AtomicFlag,
|
|
data: Mutex<HashMap<CodeCacheKey, DenoCompileCodeCacheEntry>>,
|
|
}
|
|
|
|
impl SubsequentRunCodeCacheStrategy {
|
|
fn take_from_cache(
|
|
&self,
|
|
specifier: &ModuleSpecifier,
|
|
code_cache_type: CodeCacheType,
|
|
source_hash: u64,
|
|
) -> Option<Vec<u8>> {
|
|
let mut data = self.data.lock();
|
|
// todo(dsherret): how to avoid the clone here?
|
|
let entry = data.remove(&(specifier.to_string(), code_cache_type))?;
|
|
if entry.source_hash != source_hash {
|
|
return None;
|
|
}
|
|
if data.is_empty() {
|
|
self.is_finished.raise();
|
|
}
|
|
Some(entry.data)
|
|
}
|
|
}
|
|
|
|
/// File format:
|
|
/// - <header>
|
|
/// - <cache key>
|
|
/// - <u32: number of entries>
|
|
/// - <[entry length]> - u64 * number of entries
|
|
/// - <[entry]>
|
|
/// - <[u8]: entry data>
|
|
/// - <String: specifier>
|
|
/// - <u8>: code cache type
|
|
/// - <u32: specifier length>
|
|
/// - <u64: source hash>
|
|
/// - <u64: entry data hash>
|
|
fn serialize(
|
|
file_path: &Path,
|
|
cache_key: u64,
|
|
cache: &HashMap<CodeCacheKey, DenoCompileCodeCacheEntry>,
|
|
) -> Result<(), AnyError> {
|
|
let cache_file = std::fs::OpenOptions::new()
|
|
.create(true)
|
|
.truncate(true)
|
|
.write(true)
|
|
.open(file_path)?;
|
|
let mut writer = BufWriter::new(cache_file);
|
|
serialize_with_writer(&mut writer, cache_key, cache)
|
|
}
|
|
|
|
fn serialize_with_writer<T: Write>(
|
|
writer: &mut BufWriter<T>,
|
|
cache_key: u64,
|
|
cache: &HashMap<CodeCacheKey, DenoCompileCodeCacheEntry>,
|
|
) -> Result<(), AnyError> {
|
|
// header
|
|
writer.write_all(&cache_key.to_le_bytes())?;
|
|
writer.write_all(&(cache.len() as u32).to_le_bytes())?;
|
|
// lengths of each entry
|
|
for ((specifier, _), entry) in cache {
|
|
let len: u64 =
|
|
entry.data.len() as u64 + specifier.len() as u64 + 1 + 4 + 8 + 8;
|
|
writer.write_all(&len.to_le_bytes())?;
|
|
}
|
|
// entries
|
|
for ((specifier, code_cache_type), entry) in cache {
|
|
writer.write_all(&entry.data)?;
|
|
writer.write_all(&[match code_cache_type {
|
|
CodeCacheType::EsModule => 0,
|
|
CodeCacheType::Script => 1,
|
|
}])?;
|
|
writer.write_all(specifier.as_bytes())?;
|
|
writer.write_all(&(specifier.len() as u32).to_le_bytes())?;
|
|
writer.write_all(&entry.source_hash.to_le_bytes())?;
|
|
let hash: u64 = FastInsecureHasher::new_without_deno_version()
|
|
.write(&entry.data)
|
|
.finish();
|
|
writer.write_all(&hash.to_le_bytes())?;
|
|
}
|
|
|
|
writer.flush()?;
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn deserialize(
|
|
file_path: &Path,
|
|
expected_cache_key: u64,
|
|
) -> Result<HashMap<CodeCacheKey, DenoCompileCodeCacheEntry>, AnyError> {
|
|
let cache_file = std::fs::File::open(file_path)?;
|
|
let mut reader = BufReader::new(cache_file);
|
|
deserialize_with_reader(&mut reader, expected_cache_key)
|
|
}
|
|
|
|
fn deserialize_with_reader<T: Read>(
|
|
reader: &mut BufReader<T>,
|
|
expected_cache_key: u64,
|
|
) -> Result<HashMap<CodeCacheKey, DenoCompileCodeCacheEntry>, AnyError> {
|
|
// it's very important to use this below so that a corrupt cache file
|
|
// doesn't cause a memory allocation error
|
|
fn new_vec_sized<T: Clone>(
|
|
capacity: usize,
|
|
default_value: T,
|
|
) -> Result<Vec<T>, AnyError> {
|
|
let mut vec = Vec::new();
|
|
vec.try_reserve(capacity)?;
|
|
vec.resize(capacity, default_value);
|
|
Ok(vec)
|
|
}
|
|
|
|
fn try_subtract(a: usize, b: usize) -> Result<usize, AnyError> {
|
|
if a < b {
|
|
bail!("Integer underflow");
|
|
}
|
|
Ok(a - b)
|
|
}
|
|
|
|
let mut header_bytes = vec![0; 8 + 4];
|
|
reader.read_exact(&mut header_bytes)?;
|
|
let actual_cache_key = u64::from_le_bytes(header_bytes[..8].try_into()?);
|
|
if actual_cache_key != expected_cache_key {
|
|
// cache bust
|
|
bail!("Cache key mismatch");
|
|
}
|
|
let len = u32::from_le_bytes(header_bytes[8..].try_into()?) as usize;
|
|
// read the lengths for each entry found in the file
|
|
let entry_len_bytes_capacity = len * 8;
|
|
let mut entry_len_bytes = new_vec_sized(entry_len_bytes_capacity, 0)?;
|
|
reader.read_exact(&mut entry_len_bytes)?;
|
|
let mut lengths = Vec::new();
|
|
lengths.try_reserve(len)?;
|
|
for i in 0..len {
|
|
let pos = i * 8;
|
|
lengths.push(
|
|
u64::from_le_bytes(entry_len_bytes[pos..pos + 8].try_into()?) as usize,
|
|
);
|
|
}
|
|
|
|
let mut map = HashMap::new();
|
|
map.try_reserve(len)?;
|
|
for len in lengths {
|
|
let mut buffer = new_vec_sized(len, 0)?;
|
|
reader.read_exact(&mut buffer)?;
|
|
let entry_data_hash_start_pos = try_subtract(buffer.len(), 8)?;
|
|
let expected_entry_data_hash =
|
|
u64::from_le_bytes(buffer[entry_data_hash_start_pos..].try_into()?);
|
|
let source_hash_start_pos = try_subtract(entry_data_hash_start_pos, 8)?;
|
|
let source_hash = u64::from_le_bytes(
|
|
buffer[source_hash_start_pos..entry_data_hash_start_pos].try_into()?,
|
|
);
|
|
let specifier_end_pos = try_subtract(source_hash_start_pos, 4)?;
|
|
let specifier_len = u32::from_le_bytes(
|
|
buffer[specifier_end_pos..source_hash_start_pos].try_into()?,
|
|
) as usize;
|
|
let specifier_start_pos = try_subtract(specifier_end_pos, specifier_len)?;
|
|
let specifier = String::from_utf8(
|
|
buffer[specifier_start_pos..specifier_end_pos].to_vec(),
|
|
)?;
|
|
let code_cache_type_pos = try_subtract(specifier_start_pos, 1)?;
|
|
let code_cache_type = match buffer[code_cache_type_pos] {
|
|
0 => CodeCacheType::EsModule,
|
|
1 => CodeCacheType::Script,
|
|
_ => bail!("Invalid code cache type"),
|
|
};
|
|
buffer.truncate(code_cache_type_pos);
|
|
let actual_entry_data_hash: u64 =
|
|
FastInsecureHasher::new_without_deno_version()
|
|
.write(&buffer)
|
|
.finish();
|
|
if expected_entry_data_hash != actual_entry_data_hash {
|
|
bail!("Hash mismatch.")
|
|
}
|
|
map.insert(
|
|
(specifier, code_cache_type),
|
|
DenoCompileCodeCacheEntry {
|
|
source_hash,
|
|
data: buffer,
|
|
},
|
|
);
|
|
}
|
|
|
|
Ok(map)
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod test {
|
|
use test_util::TempDir;
|
|
|
|
use super::*;
|
|
use std::fs::File;
|
|
|
|
#[test]
|
|
fn serialize_deserialize() {
|
|
let cache_key = 123456;
|
|
let cache = {
|
|
let mut cache = HashMap::new();
|
|
cache.insert(
|
|
("specifier1".to_string(), CodeCacheType::EsModule),
|
|
DenoCompileCodeCacheEntry {
|
|
source_hash: 1,
|
|
data: vec![1, 2, 3],
|
|
},
|
|
);
|
|
cache.insert(
|
|
("specifier2".to_string(), CodeCacheType::EsModule),
|
|
DenoCompileCodeCacheEntry {
|
|
source_hash: 2,
|
|
data: vec![4, 5, 6],
|
|
},
|
|
);
|
|
cache.insert(
|
|
("specifier2".to_string(), CodeCacheType::Script),
|
|
DenoCompileCodeCacheEntry {
|
|
source_hash: 2,
|
|
data: vec![6, 5, 1],
|
|
},
|
|
);
|
|
cache
|
|
};
|
|
let mut buffer = Vec::new();
|
|
serialize_with_writer(&mut BufWriter::new(&mut buffer), cache_key, &cache)
|
|
.unwrap();
|
|
let deserialized =
|
|
deserialize_with_reader(&mut BufReader::new(&buffer[..]), cache_key)
|
|
.unwrap();
|
|
assert_eq!(cache, deserialized);
|
|
}
|
|
|
|
#[test]
|
|
fn serialize_deserialize_empty() {
|
|
let cache_key = 1234;
|
|
let cache = HashMap::new();
|
|
let mut buffer = Vec::new();
|
|
serialize_with_writer(&mut BufWriter::new(&mut buffer), cache_key, &cache)
|
|
.unwrap();
|
|
let deserialized =
|
|
deserialize_with_reader(&mut BufReader::new(&buffer[..]), cache_key)
|
|
.unwrap();
|
|
assert_eq!(cache, deserialized);
|
|
}
|
|
|
|
#[test]
|
|
fn serialize_deserialize_corrupt() {
|
|
let buffer = "corrupttestingtestingtesting".as_bytes().to_vec();
|
|
let err = deserialize_with_reader(&mut BufReader::new(&buffer[..]), 1234)
|
|
.unwrap_err();
|
|
assert_eq!(err.to_string(), "Cache key mismatch");
|
|
}
|
|
|
|
#[test]
|
|
fn code_cache() {
|
|
let temp_dir = TempDir::new();
|
|
let file_path = temp_dir.path().join("cache.bin").to_path_buf();
|
|
let url1 = ModuleSpecifier::parse("https://deno.land/example1.js").unwrap();
|
|
let url2 = ModuleSpecifier::parse("https://deno.land/example2.js").unwrap();
|
|
// first run
|
|
{
|
|
let code_cache = DenoCompileCodeCache::new(file_path.clone(), 1234);
|
|
assert!(code_cache
|
|
.get_sync(&url1, CodeCacheType::EsModule, 0)
|
|
.is_none());
|
|
assert!(code_cache
|
|
.get_sync(&url2, CodeCacheType::EsModule, 1)
|
|
.is_none());
|
|
assert!(code_cache.enabled());
|
|
code_cache.set_sync(url1.clone(), CodeCacheType::EsModule, 0, &[1, 2, 3]);
|
|
assert!(code_cache.enabled());
|
|
assert!(!file_path.exists());
|
|
code_cache.set_sync(url2.clone(), CodeCacheType::EsModule, 1, &[2, 1, 3]);
|
|
assert!(file_path.exists()); // now the new code cache exists
|
|
assert!(!code_cache.enabled()); // no longer enabled
|
|
}
|
|
// second run
|
|
{
|
|
let code_cache = DenoCompileCodeCache::new(file_path.clone(), 1234);
|
|
assert!(code_cache.enabled());
|
|
let result1 = code_cache
|
|
.get_sync(&url1, CodeCacheType::EsModule, 0)
|
|
.unwrap();
|
|
assert!(code_cache.enabled());
|
|
let result2 = code_cache
|
|
.get_sync(&url2, CodeCacheType::EsModule, 1)
|
|
.unwrap();
|
|
assert!(!code_cache.enabled()); // no longer enabled
|
|
assert_eq!(result1, vec![1, 2, 3]);
|
|
assert_eq!(result2, vec![2, 1, 3]);
|
|
}
|
|
|
|
// new cache key first run
|
|
{
|
|
let code_cache = DenoCompileCodeCache::new(file_path.clone(), 54321);
|
|
assert!(code_cache
|
|
.get_sync(&url1, CodeCacheType::EsModule, 0)
|
|
.is_none());
|
|
assert!(code_cache
|
|
.get_sync(&url2, CodeCacheType::EsModule, 1)
|
|
.is_none());
|
|
code_cache.set_sync(url1.clone(), CodeCacheType::EsModule, 0, &[2, 2, 3]);
|
|
code_cache.set_sync(url2.clone(), CodeCacheType::EsModule, 1, &[3, 2, 3]);
|
|
}
|
|
// new cache key second run
|
|
{
|
|
let code_cache = DenoCompileCodeCache::new(file_path.clone(), 54321);
|
|
let result1 = code_cache
|
|
.get_sync(&url1, CodeCacheType::EsModule, 0)
|
|
.unwrap();
|
|
assert_eq!(result1, vec![2, 2, 3]);
|
|
assert!(code_cache
|
|
.get_sync(&url2, CodeCacheType::EsModule, 5) // different hash will cause none
|
|
.is_none());
|
|
}
|
|
}
|
|
}
|