You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
365 lines
10 KiB
365 lines
10 KiB
'use strict';
|
|
|
|
const Module = require('module');
|
|
const crypto = require('crypto');
|
|
const fs = require('fs');
|
|
const path = require('path');
|
|
const vm = require('vm');
|
|
const os = require('os');
|
|
|
|
const hasOwnProperty = Object.prototype.hasOwnProperty;
|
|
|
|
//------------------------------------------------------------------------------
|
|
// FileSystemBlobStore
|
|
//------------------------------------------------------------------------------
|
|
|
|
class FileSystemBlobStore {
|
|
constructor(directory, prefix) {
|
|
const name = prefix ? slashEscape(prefix + '.') : '';
|
|
this._blobFilename = path.join(directory, name + 'BLOB');
|
|
this._mapFilename = path.join(directory, name + 'MAP');
|
|
this._lockFilename = path.join(directory, name + 'LOCK');
|
|
this._directory = directory;
|
|
this._load();
|
|
}
|
|
|
|
has(key, invalidationKey) {
|
|
if (hasOwnProperty.call(this._memoryBlobs, key)) {
|
|
return this._invalidationKeys[key] === invalidationKey;
|
|
} else if (hasOwnProperty.call(this._storedMap, key)) {
|
|
return this._storedMap[key][0] === invalidationKey;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
get(key, invalidationKey) {
|
|
if (hasOwnProperty.call(this._memoryBlobs, key)) {
|
|
if (this._invalidationKeys[key] === invalidationKey) {
|
|
return this._memoryBlobs[key];
|
|
}
|
|
} else if (hasOwnProperty.call(this._storedMap, key)) {
|
|
const mapping = this._storedMap[key];
|
|
if (mapping[0] === invalidationKey) {
|
|
return this._storedBlob.slice(mapping[1], mapping[2]);
|
|
}
|
|
}
|
|
}
|
|
|
|
set(key, invalidationKey, buffer) {
|
|
this._invalidationKeys[key] = invalidationKey;
|
|
this._memoryBlobs[key] = buffer;
|
|
this._dirty = true;
|
|
}
|
|
|
|
delete(key) {
|
|
if (hasOwnProperty.call(this._memoryBlobs, key)) {
|
|
this._dirty = true;
|
|
delete this._memoryBlobs[key];
|
|
}
|
|
if (hasOwnProperty.call(this._invalidationKeys, key)) {
|
|
this._dirty = true;
|
|
delete this._invalidationKeys[key];
|
|
}
|
|
if (hasOwnProperty.call(this._storedMap, key)) {
|
|
this._dirty = true;
|
|
delete this._storedMap[key];
|
|
}
|
|
}
|
|
|
|
isDirty() {
|
|
return this._dirty;
|
|
}
|
|
|
|
save() {
|
|
const dump = this._getDump();
|
|
const blobToStore = Buffer.concat(dump[0]);
|
|
const mapToStore = JSON.stringify(dump[1]);
|
|
|
|
try {
|
|
mkdirpSync(this._directory);
|
|
fs.writeFileSync(this._lockFilename, 'LOCK', {flag: 'wx'});
|
|
} catch (error) {
|
|
// Swallow the exception if we fail to acquire the lock.
|
|
return false;
|
|
}
|
|
|
|
try {
|
|
fs.writeFileSync(this._blobFilename, blobToStore);
|
|
fs.writeFileSync(this._mapFilename, mapToStore);
|
|
} catch (error) {
|
|
throw error;
|
|
} finally {
|
|
fs.unlinkSync(this._lockFilename);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
_load() {
|
|
try {
|
|
this._storedBlob = fs.readFileSync(this._blobFilename);
|
|
this._storedMap = JSON.parse(fs.readFileSync(this._mapFilename));
|
|
} catch (e) {
|
|
this._storedBlob = Buffer.alloc(0);
|
|
this._storedMap = {};
|
|
}
|
|
this._dirty = false;
|
|
this._memoryBlobs = {};
|
|
this._invalidationKeys = {};
|
|
}
|
|
|
|
_getDump() {
|
|
const buffers = [];
|
|
const newMap = {};
|
|
let offset = 0;
|
|
|
|
function push(key, invalidationKey, buffer) {
|
|
buffers.push(buffer);
|
|
newMap[key] = [invalidationKey, offset, offset + buffer.length];
|
|
offset += buffer.length;
|
|
}
|
|
|
|
for (const key of Object.keys(this._memoryBlobs)) {
|
|
const buffer = this._memoryBlobs[key];
|
|
const invalidationKey = this._invalidationKeys[key];
|
|
push(key, invalidationKey, buffer);
|
|
}
|
|
|
|
for (const key of Object.keys(this._storedMap)) {
|
|
if (hasOwnProperty.call(newMap, key)) continue;
|
|
const mapping = this._storedMap[key];
|
|
const buffer = this._storedBlob.slice(mapping[1], mapping[2]);
|
|
push(key, mapping[0], buffer);
|
|
}
|
|
|
|
return [buffers, newMap];
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// NativeCompileCache
|
|
//------------------------------------------------------------------------------
|
|
|
|
class NativeCompileCache {
|
|
constructor() {
|
|
this._cacheStore = null;
|
|
this._previousModuleCompile = null;
|
|
}
|
|
|
|
setCacheStore(cacheStore) {
|
|
this._cacheStore = cacheStore;
|
|
}
|
|
|
|
install() {
|
|
const self = this;
|
|
const hasRequireResolvePaths = typeof require.resolve.paths === 'function';
|
|
this._previousModuleCompile = Module.prototype._compile;
|
|
Module.prototype._compile = function(content, filename) {
|
|
const mod = this;
|
|
|
|
function require(id) {
|
|
return mod.require(id);
|
|
}
|
|
|
|
// https://github.com/nodejs/node/blob/v10.15.3/lib/internal/modules/cjs/helpers.js#L28
|
|
function resolve(request, options) {
|
|
return Module._resolveFilename(request, mod, false, options);
|
|
}
|
|
require.resolve = resolve;
|
|
|
|
// https://github.com/nodejs/node/blob/v10.15.3/lib/internal/modules/cjs/helpers.js#L37
|
|
// resolve.resolve.paths was added in v8.9.0
|
|
if (hasRequireResolvePaths) {
|
|
resolve.paths = function paths(request) {
|
|
return Module._resolveLookupPaths(request, mod, true);
|
|
};
|
|
}
|
|
|
|
require.main = process.mainModule;
|
|
|
|
// Enable support to add extra extension types
|
|
require.extensions = Module._extensions;
|
|
require.cache = Module._cache;
|
|
|
|
const dirname = path.dirname(filename);
|
|
|
|
const compiledWrapper = self._moduleCompile(filename, content);
|
|
|
|
// We skip the debugger setup because by the time we run, node has already
|
|
// done that itself.
|
|
|
|
const args = [mod.exports, require, mod, filename, dirname, process, global];
|
|
return compiledWrapper.apply(mod.exports, args);
|
|
};
|
|
}
|
|
|
|
uninstall() {
|
|
Module.prototype._compile = this._previousModuleCompile;
|
|
}
|
|
|
|
_moduleCompile(filename, content) {
|
|
// https://github.com/nodejs/node/blob/v7.5.0/lib/module.js#L511
|
|
|
|
// Remove shebang
|
|
var contLen = content.length;
|
|
if (contLen >= 2) {
|
|
if (content.charCodeAt(0) === 35/*#*/ &&
|
|
content.charCodeAt(1) === 33/*!*/) {
|
|
if (contLen === 2) {
|
|
// Exact match
|
|
content = '';
|
|
} else {
|
|
// Find end of shebang line and slice it off
|
|
var i = 2;
|
|
for (; i < contLen; ++i) {
|
|
var code = content.charCodeAt(i);
|
|
if (code === 10/*\n*/ || code === 13/*\r*/) break;
|
|
}
|
|
if (i === contLen) {
|
|
content = '';
|
|
} else {
|
|
// Note that this actually includes the newline character(s) in the
|
|
// new output. This duplicates the behavior of the regular
|
|
// expression that was previously used to replace the shebang line
|
|
content = content.slice(i);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// create wrapper function
|
|
var wrapper = Module.wrap(content);
|
|
|
|
var invalidationKey = crypto
|
|
.createHash('sha1')
|
|
.update(content, 'utf8')
|
|
.digest('hex');
|
|
|
|
var buffer = this._cacheStore.get(filename, invalidationKey);
|
|
|
|
var script = new vm.Script(wrapper, {
|
|
filename: filename,
|
|
lineOffset: 0,
|
|
displayErrors: true,
|
|
cachedData: buffer,
|
|
produceCachedData: true,
|
|
});
|
|
|
|
if (script.cachedDataProduced) {
|
|
this._cacheStore.set(filename, invalidationKey, script.cachedData);
|
|
} else if (script.cachedDataRejected) {
|
|
this._cacheStore.delete(filename);
|
|
}
|
|
|
|
var compiledWrapper = script.runInThisContext({
|
|
filename: filename,
|
|
lineOffset: 0,
|
|
columnOffset: 0,
|
|
displayErrors: true,
|
|
});
|
|
|
|
return compiledWrapper;
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// utilities
|
|
//
|
|
// https://github.com/substack/node-mkdirp/blob/f2003bb/index.js#L55-L98
|
|
// https://github.com/zertosh/slash-escape/blob/e7ebb99/slash-escape.js
|
|
//------------------------------------------------------------------------------
|
|
|
|
function mkdirpSync(p_) {
|
|
_mkdirpSync(path.resolve(p_), parseInt('0777', 8) & ~process.umask());
|
|
}
|
|
|
|
function _mkdirpSync(p, mode) {
|
|
try {
|
|
fs.mkdirSync(p, mode);
|
|
} catch (err0) {
|
|
if (err0.code === 'ENOENT') {
|
|
_mkdirpSync(path.dirname(p));
|
|
_mkdirpSync(p);
|
|
} else {
|
|
try {
|
|
const stat = fs.statSync(p);
|
|
if (!stat.isDirectory()) { throw err0; }
|
|
} catch (err1) {
|
|
throw err0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
function slashEscape(str) {
|
|
const ESCAPE_LOOKUP = {
|
|
'\\': 'zB',
|
|
':': 'zC',
|
|
'/': 'zS',
|
|
'\x00': 'z0',
|
|
'z': 'zZ',
|
|
};
|
|
return str.replace(/[\\:\/\x00z]/g, match => (ESCAPE_LOOKUP[match]));
|
|
}
|
|
|
|
function supportsCachedData() {
|
|
const script = new vm.Script('""', {produceCachedData: true});
|
|
// chakracore, as of v1.7.1.0, returns `false`.
|
|
return script.cachedDataProduced === true;
|
|
}
|
|
|
|
function getCacheDir() {
|
|
// Avoid cache ownership issues on POSIX systems.
|
|
const dirname = typeof process.getuid === 'function'
|
|
? 'v8-compile-cache-' + process.getuid()
|
|
: 'v8-compile-cache';
|
|
const version = typeof process.versions.v8 === 'string'
|
|
? process.versions.v8
|
|
: typeof process.versions.chakracore === 'string'
|
|
? 'chakracore-' + process.versions.chakracore
|
|
: 'node-' + process.version;
|
|
const cacheDir = path.join(os.tmpdir(), dirname, version);
|
|
return cacheDir;
|
|
}
|
|
|
|
function getParentName() {
|
|
// `module.parent.filename` is undefined or null when:
|
|
// * node -e 'require("v8-compile-cache")'
|
|
// * node -r 'v8-compile-cache'
|
|
// * Or, requiring from the REPL.
|
|
const parentName = module.parent && typeof module.parent.filename === 'string'
|
|
? module.parent.filename
|
|
: process.cwd();
|
|
return parentName;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// main
|
|
//------------------------------------------------------------------------------
|
|
|
|
if (!process.env.DISABLE_V8_COMPILE_CACHE && supportsCachedData()) {
|
|
const cacheDir = getCacheDir();
|
|
const prefix = getParentName();
|
|
const blobStore = new FileSystemBlobStore(cacheDir, prefix);
|
|
|
|
const nativeCompileCache = new NativeCompileCache();
|
|
nativeCompileCache.setCacheStore(blobStore);
|
|
nativeCompileCache.install();
|
|
|
|
process.once('exit', code => {
|
|
if (blobStore.isDirty()) {
|
|
blobStore.save();
|
|
}
|
|
nativeCompileCache.uninstall();
|
|
});
|
|
}
|
|
|
|
module.exports.__TEST__ = {
|
|
FileSystemBlobStore,
|
|
NativeCompileCache,
|
|
mkdirpSync,
|
|
slashEscape,
|
|
supportsCachedData,
|
|
getCacheDir,
|
|
getParentName,
|
|
};
|