From 4fd71935795fa7c284f5ed621551b65a28b8271c Mon Sep 17 00:00:00 2001
From: Joyee Cheung <joyeec9h3@gmail.com>
Date: Thu, 4 Apr 2019 06:29:02 +0800
Subject: tools: implement mkcodecache as an executable

This patch implement a mkcodecache executable on top of the
`NativeModuleLoader` singleton.
This makes it possible to build a Node.js binary with embedded
code cache without building itself using the code cache stub -
the cache is now initialized by `NativeModuleEnv` instead which
can be refactored out of the mkcodecache dependencies.

PR-URL: https://github.com/nodejs/node/pull/27161
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
---
 tools/generate_code_cache.js | 135 -------------------------------------------
 1 file changed, 135 deletions(-)
 delete mode 100644 tools/generate_code_cache.js

(limited to 'tools/generate_code_cache.js')

diff --git a/tools/generate_code_cache.js b/tools/generate_code_cache.js
deleted file mode 100644
index 8afbc14a9b..0000000000
--- a/tools/generate_code_cache.js
+++ /dev/null
@@ -1,135 +0,0 @@
-'use strict';
-
-// Flags: --expose-internals
-
-// This file generates the code cache for builtin modules and
-// writes them into static char arrays of a C++ file that can be
-// compiled into the binary using the `--code-cache-path` option
-// of `configure`.
-
-const { internalBinding } = require('internal/test/binding');
-const {
-  moduleCategories: { canBeRequired },
-  getCodeCache,
-  compileFunction,
-} = internalBinding('native_module');
-
-const {
-  types: {
-    isUint8Array
-  }
-} = require('util');
-
-const fs = require('fs');
-
-const resultPath = process.argv[2];
-if (!resultPath) {
-  console.error(`Usage: ${process.argv[0]} ${process.argv[1]}` +
-                'path/to/node_code_cache.cc');
-  process.exit(1);
-}
-
-/**
- * Format a number of a size in bytes into human-readable strings
- * @param {number} num
- * @return {string}
- */
-function formatSize(num) {
-  if (num < 1024) {
-    return `${(num).toFixed(2)}B`;
-  } else if (num < 1024 ** 2) {
-    return `${(num / 1024).toFixed(2)}KB`;
-  } else if (num < 1024 ** 3) {
-    return `${(num / (1024 ** 2)).toFixed(2)}MB`;
-  } else {
-    return `${(num / (1024 ** 3)).toFixed(2)}GB`;
-  }
-}
-
-/**
- * Generates the source code of definitions of the char arrays
- * that contains the code cache and the source code of the
- * initializers of the code cache.
- *
- * @param {string} key ID of the builtin module
- * @param {Uint8Array} cache Code cache of the builtin module
- * @return { definition: string, initializer: string }
- */
-function getInitalizer(key, cache) {
-  const defName = `${key.replace(/\//g, '_').replace(/-/g, '_')}_raw`;
-  const definition = `static const uint8_t ${defName}[] = {\n` +
-                     `${cache.join(',')}\n};`;
-  const dataDef = 'std::make_unique<v8::ScriptCompiler::CachedData>(' +
-                  `${defName}, static_cast<int>(arraysize(${defName})), ` +
-                  'policy)';
-  const initializer =
-    'code_cache->emplace(\n' +
-    `  "${key}",\n` +
-    `  ${dataDef}\n` +
-    ');';
-  return {
-    definition, initializer
-  };
-}
-
-const cacheDefinitions = [];
-const cacheInitializers = [];
-let totalCacheSize = 0;
-
-function lexical(a, b) {
-  if (a < b) {
-    return -1;
-  }
-  if (a > b) {
-    return 1;
-  }
-  return 0;
-}
-
-// TODO(joyeecheung): support non-modules that require different
-// parameters in the wrapper.
-for (const key of [...canBeRequired].sort(lexical)) {
-  compileFunction(key);  // compile it
-  const cachedData = getCodeCache(key);
-  if (!isUint8Array(cachedData)) {
-    console.error(`Failed to generate code cache for '${key}'`);
-    process.exit(1);
-  }
-
-  const size = cachedData.byteLength;
-  totalCacheSize += size;
-  const {
-    definition, initializer,
-  } = getInitalizer(key, cachedData);
-  cacheDefinitions.push(definition);
-  cacheInitializers.push(initializer);
-  console.log(`Generated cache for '${key}', size = ${formatSize(size)}` +
-              `, total = ${formatSize(totalCacheSize)}`);
-}
-
-const result = `#include "node_native_module_env.h"
-
-// This file is generated by tools/generate_code_cache.js
-// and is used when configure is run with \`--code-cache-path\`
-
-namespace node {
-namespace native_module {
-${cacheDefinitions.join('\n\n')}
-
-void NativeModuleEnv::InitializeCodeCache() {
-  NativeModuleCacheMap* code_cache =
-      NativeModuleLoader::GetInstance()->code_cache();
-  if (!code_cache->empty()) {
-    return;
-  }
-
-  auto policy = v8::ScriptCompiler::CachedData::BufferPolicy::BufferNotOwned;
-  ${cacheInitializers.join('\n  ')}
-}
-
-}  // namespace native_module
-}  // namespace node
-`;
-
-fs.writeFileSync(resultPath, result);
-console.log(`Generated code cache C++ file to ${resultPath}`);
-- 
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