From: Bryce McKinlay <bmckinlay@gmail.com>
To: majia gm <gmmajia@gmail.com>
Cc: gcc-help@gcc.gnu.org, Java List <java@gcc.gnu.org>
Subject: Re: a question about directory structure of libjava
Date: Thu, 20 Jan 2011 13:24:00 -0000 [thread overview]
Message-ID: <AANLkTimoVhFfh9qeKoGt6OEQu1AbYCqqNGzdAJ4z8L4=@mail.gmail.com> (raw)
In-Reply-To: <AANLkTimJc-qn320hWE86goMdQ9bdd5yqOONmWSyodjc-@mail.gmail.com>
On Thu, Jan 20, 2011 at 12:42 PM, majia gm <gmmajia@gmail.com> wrote:
> Hi, Bryce.
>
> Thanks for your reply. It's very kind of you.
>
> I'v read a little document of JNI and CNI.
>
> CNI seems to layout data such as classes and objects conforming to
> C++, so there comes the header file.
>
> What I'm really curious about is how the non-native methods in
> library being executed in runtime. One way I can imagine is to
> interpret the byte codes.
>
> But when I use GDB to track gij, I found native codes, source lines
> of which is in Java files of the library.
>
> Dose it mean the byte codes in library may be translated into native codes?
> If it is the truth, then when dose it happen?
gcj is a java-to-native-code compiler. So, the Java code in libjava is
compiled, by gcj, into a native code library, libgcj.so. libgcj.so
contains both the Java and C/C++ parts of the library. This all
happens at the time you build GCC, rather than at runtime like a
traditional JVM.
Bryce
prev parent reply other threads:[~2011-01-20 13:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-20 8:50 majia gm
2011-01-20 9:08 ` Bryce McKinlay
2011-01-20 12:42 ` majia gm
2011-01-20 13:24 ` Bryce McKinlay [this message]
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