From 1abbe0a2123e8333922894258389c2d5c1568472 Mon Sep 17 00:00:00 2001
From: Ujjwal Sharma <usharma1998@gmail.com>
Date: Thu, 28 Jun 2018 12:05:19 +0530
Subject: vm: add bindings for v8::CompileFunctionInContext

Adds a method compileFunction to the vm module, which serves as a
binding for v8::CompileFunctionInContext with appropriate args for
specifying the details, and provide params for the wrapper.

Eventually, we would be changing Module._compile to use this internally
over the standard Module.wrap

PR-URL: https://github.com/nodejs/node/pull/21571
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: John-David Dalton <john.david.dalton@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 lib/vm.js | 94 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)

(limited to 'lib/vm.js')

diff --git a/lib/vm.js b/lib/vm.js
index b80cd98dee..6ec40f9bca 100644
--- a/lib/vm.js
+++ b/lib/vm.js
@@ -26,12 +26,17 @@ const {
   ContextifyScript,
   makeContext,
   isContext: _isContext,
+  compileFunction: _compileFunction
 } = internalBinding('contextify');
+
 const { ERR_INVALID_ARG_TYPE } = require('internal/errors').codes;
 const { isUint8Array } = require('internal/util/types');
 const { validateInt32, validateUint32 } = require('internal/validators');
 const kParsingContext = Symbol('script parsing context');
 
+const ArrayForEach = Function.call.bind(Array.prototype.forEach);
+const ArrayIsArray = Array.isArray;
+
 class Script extends ContextifyScript {
   constructor(code, options = {}) {
     code = `${code}`;
@@ -286,6 +291,94 @@ function runInThisContext(code, options) {
   return createScript(code, options).runInThisContext(options);
 }
 
+function compileFunction(code, params, options = {}) {
+  if (typeof code !== 'string') {
+    throw new ERR_INVALID_ARG_TYPE('code', 'string', code);
+  }
+  if (params !== undefined) {
+    if (!ArrayIsArray(params)) {
+      throw new ERR_INVALID_ARG_TYPE('params', 'Array', params);
+    }
+    ArrayForEach(params, (param, i) => {
+      if (typeof param !== 'string') {
+        throw new ERR_INVALID_ARG_TYPE(`params[${i}]`, 'string', param);
+      }
+    });
+  }
+
+  const {
+    filename = '',
+    columnOffset = 0,
+    lineOffset = 0,
+    cachedData = undefined,
+    produceCachedData = false,
+    parsingContext = undefined,
+    contextExtensions = [],
+  } = options;
+
+  if (typeof filename !== 'string') {
+    throw new ERR_INVALID_ARG_TYPE('options.filename', 'string', filename);
+  }
+  validateUint32(columnOffset, 'options.columnOffset');
+  validateUint32(lineOffset, 'options.lineOffset');
+  if (cachedData !== undefined && !isUint8Array(cachedData)) {
+    throw new ERR_INVALID_ARG_TYPE(
+      'options.cachedData',
+      'Uint8Array',
+      cachedData
+    );
+  }
+  if (typeof produceCachedData !== 'boolean') {
+    throw new ERR_INVALID_ARG_TYPE(
+      'options.produceCachedData',
+      'boolean',
+      produceCachedData
+    );
+  }
+  if (parsingContext !== undefined) {
+    if (
+      typeof parsingContext !== 'object' ||
+      parsingContext === null ||
+      !isContext(parsingContext)
+    ) {
+      throw new ERR_INVALID_ARG_TYPE(
+        'options.parsingContext',
+        'Context',
+        parsingContext
+      );
+    }
+  }
+  if (!ArrayIsArray(contextExtensions)) {
+    throw new ERR_INVALID_ARG_TYPE(
+      'options.contextExtensions',
+      'Array',
+      contextExtensions
+    );
+  }
+  ArrayForEach(contextExtensions, (extension, i) => {
+    if (typeof extension !== 'object') {
+      throw new ERR_INVALID_ARG_TYPE(
+        `options.contextExtensions[${i}]`,
+        'object',
+        extension
+      );
+    }
+  });
+
+  return _compileFunction(
+    code,
+    filename,
+    lineOffset,
+    columnOffset,
+    cachedData,
+    produceCachedData,
+    parsingContext,
+    contextExtensions,
+    params
+  );
+}
+
+
 module.exports = {
   Script,
   createContext,
@@ -294,6 +387,7 @@ module.exports = {
   runInNewContext,
   runInThisContext,
   isContext,
+  compileFunction,
 };
 
 if (process.binding('config').experimentalVMModules) {
-- 
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