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7cbbb27c07
Currently V8 only checks that the length of the source code is the
same as the code used to generate the hash, so we add an additional
check here:
1. During compile time, when generating node_javascript.cc and
node_code_cache.cc, we compute and include the hash of the
(unwrapped) JavaScript source in both.
2. At runtime, we check that the hash of the code being compiled
and the hash of the code used to generate the cache
(inside the wrapper) is the same.
This is based on the assumptions:
1. `internalBinding('code_cache_hash')` must be in sync with
`internalBinding('code_cache')` (same C++ file)
2. `internalBinding('natives_hash')` must be in sync with
`process.binding('natives')` (same C++ file)
3. If `internalBinding('natives_hash')` is in sync with
`internalBinding('natives_hash')`, then the (unwrapped)
code used to generate `internalBinding('code_cache')`
should be in sync with the (unwrapped) code in
`process.binding('natives')`
There will be, however, false positives if the wrapper used
to generate the cache is different from the one used at run time,
and the length of the wrapper somehow stays the same.
But that should be rare and can be eased once we make the
two bootstrappers cached and checked as well.
PR-URL: https://github.com/nodejs/node/pull/22152
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
60 lines
1.7 KiB
JavaScript
60 lines
1.7 KiB
JavaScript
'use strict';
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// This is only exposed for internal build steps and testing purposes.
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// We create new copies of the source and the code cache
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// so the resources eventually used to compile builtin modules
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// cannot be tampered with even with --expose-internals
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const {
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NativeModule, internalBinding
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} = require('internal/bootstrap/loaders');
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function getCodeCache(id) {
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const cached = NativeModule.getCached(id);
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if (cached && (cached.loaded || cached.loading)) {
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return cached.script.createCachedData();
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}
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// The script has not been compiled and run
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NativeModule.require(id);
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return getCodeCache(id);
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}
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const depsModule = Object.keys(NativeModule._source).filter(
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(key) => NativeModule.isDepsModule(key) || key.startsWith('internal/deps')
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);
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// Modules with source code compiled in js2c that
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// cannot be compiled with the code cache
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const cannotUseCache = [
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'config',
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'sys', // deprecated
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'internal/v8_prof_polyfill',
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'internal/v8_prof_processor',
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'internal/per_context',
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'internal/test/binding',
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// TODO(joyeecheung): update the C++ side so that
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// the code cache is also used when compiling these
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// two files.
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'internal/bootstrap/loaders',
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'internal/bootstrap/node'
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].concat(depsModule);
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module.exports = {
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cachableBuiltins: Object.keys(NativeModule._source).filter(
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(key) => !cannotUseCache.includes(key)
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),
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builtinSource: Object.assign({}, NativeModule._source),
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getCodeCache,
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getSource: NativeModule.getSource,
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codeCache: internalBinding('code_cache'),
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compiledWithoutCache: NativeModule.compiledWithoutCache,
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compiledWithCache: NativeModule.compiledWithCache,
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nativeModuleWrap(script) {
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return NativeModule.wrap(script);
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},
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cannotUseCache
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};
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