v8/tools/detect-builtins.js

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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
(function(global) {
var GetProperties = function(this_name, object) {
var result = {};
try {
var names = Object.getOwnPropertyNames(object);
} catch(e) {
return;
}
for (var i = 0; i < names.length; ++i) {
var name = names[i];
if (typeof object === "function") {
if (name === "length" ||
name === "name" ||
name === "arguments" ||
name === "caller" ||
name === "prototype") {
continue;
}
}
// Avoid endless recursion.
if (this_name === "prototype" && name === "constructor") continue;
// Avoid needless duplication.
if (this_name === "__PROTO__" && name === "constructor") continue;
// Could get this from the parent, but having it locally is easier.
var property = { "name": name };
try {
var value = object[name];
} catch(e) {
property.type = "getter";
result[name] = property;
continue;
}
var type = typeof value;
property.type = type;
if (type === "function") {
property.length = value.length;
property.prototype = GetProperties("prototype", value.prototype);
}
if (type === "string" || type === "number") {
property.value = value;
} else {
property.properties = GetProperties(name, value);
}
result[name] = property;
}
// Print the __proto__ if it's not the default Object prototype.
if (typeof object === "object" && object.__proto__ !== null &&
!object.__proto__.hasOwnProperty("__proto__")) {
result.__PROTO__ = GetProperties("__PROTO__", object.__proto__);
}
return result;
};
var g = GetProperties("", global, "");
print(JSON.stringify(g, undefined, 2));
})(this); // Must wrap in anonymous closure or it'll detect itself as builtin.