native-code

I tried to investigate the jQuery code, so I used this: document.write($.constructor); jsfiddle I got this result: function Function() { [native code] } What does [native code] mean? Why can't I see the real code? Tested with Google-Chrome $ , jQuery is just a function. Without invoking it, it's just an ordinary function. A function's constructor is Function , hence $.constructor shows [native code] . When you define functions in an interpreted language (as opposed to a compiled language). You have access to the file / string / text that defines the function. In JavaScript for example you can

My project use a module of capturing crash and send in android system. When handling the native crash, native code will do something and then do java calls from JNI. It works well on the Dalvik. But it fails in android version above 5.0 using ART. Because ART prevents any Java calls from JNI during native signal handling. It says that ART signal handling uses alternate signal stack, so during the process of signal handing, can't call java methods? Is there any other ways?? Flow： 1. Java call native method, but native method crashes. 2. Native crash handler catches the signal to handle the

Is it really possible, with Google's V8 Engine, to compile JavaScript into Native Code, save it as a binary file, and execute it whenever I want through my software envorinment, on any machine? You can use the V8 snapshot functionality to precompile the code. This still means that you have to have a full version of V8 running to load the snapshot (i.e., you don't get stand-alone native code, it needs to run inside the V8 VM), so all you save is the compilation time. Also, the quality of snapshot code isn't necessarily as good as JIT'ed code because JIT code can use, e.g., SSE2/SSE3 if it's

Is there any way to compile from Java to standalone (or library) machine code without requiring a JVM? There used to be a tool called GCJ that was part of GCC, but it's been removed . Now, all the links in the GCC site re-direct to their non-GCJ equivalents. NB: the comments all refered to my original answer saying you can compile Java to native code with GCJ. Excelsior JET is a commercial Java to native code compiler. Yes! Oracle has been working on the GraalVm, which supports Native Images. Check here: https://www.graalvm.org/ Native Image The native image feature with the GraalVM SDK helps

Is there a native machine code compiler for JavaScript? I'm not talking about a VM. If it doesn't exist can it be done? I am wondering if it can be compiled to binary due to the dynamic nature of the language. Falaina As far as I know, there are no static compilers for JavaScript. It is certainly theoretically possible; however, a static compilation of JavaScript would need a very heavyweight runtime to support all of its features (such as dynamic typing and eval). As a small aside, when presented with the need to statically compile Python (another dynamic language), the PyPy developers ended

I need to unload a DLL that was loaded with System.loadLibrary(..) , anyone know if this is possible? Jon Skeet I don't have any experience of this, but a bit of digging shows that the library should be unloaded when the classloader which loaded the library is garbage collected. Links: Invocation API docs (Sun) - look for "Library and Version Management" Java JNI DLL Unloading tutorial 来源： https://stackoverflow.com/questions/453359/how-to-unload-library-dll-from-java-jvm