inspect native code

Question

Is there any way by which I can explore native code in Javascript? I want to see what Function() class has in it.

Ehh? There's a specification, if you'd like that? JavaScript is determined by it, and as so, for a non-browser-specific way to look at it, that's the way you want to go. — Sune Rasmussen, May 20 '10 at 10:37
not exactly byte code...but the native classes and functions. For example if you write alert(Function) then you see Function(){[native code]}. So I want to explore this native code. — alter, May 20 '10 at 19:24

score 3 · Accepted Answer · answered May 20 '10 at 10:29

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You could have a look at the source code of an open source browser such as Firefox.

answered May 20 '10 at 10:29

Jesper

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any other way to do it in runtime? – marcio Oct 28 '11 at 11:13
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@marcioAlmada: At runtime, no. The code for `Function` (and most other built-ins) isn't Javascript; it's native code. In order to do it at runtime, the script engine would have to have an embedded native-code disassembler or something. Which none that i know of do. – cHao Jun 29 '12 at 18:09

score 2 · Answer 2 · edited May 23 '17 at 10:24

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I've always wanted to do this myself. On a side note, here's how to view assembly language code generated by the V8 JS engine for Chromium (I haven't tried it yet): How can I see the machine code generated by v8?

edited May 23 '17 at 10:24

Community

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answered Aug 08 '12 at 08:52

Marc Kirkwood

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inspect native code

2 Answers2