Hi Amos,
Pardon me, what does the class loader have to do with JMX?
- yba
On Tue, 9 Oct 2012, Amos Shapira wrote:
Date: Tue, 9 Oct 2012 22:06:16 +1100
From: Amos Shapira <amos.shap...@gmail.com>
To: Jonathan Ben Avraham <y...@tkos.co.il>
Cc: linux-il <linux-il@cs.huji.ac.il>
Subject: Re: Looking for directions about compiling and tracing OpenJDK
Thanks to both of you.
To give more details of what I'm after - I want to know whether the class
bytecode address points into the mmap(2)'ed jar file or into malloc(3)'ed
memory. I think I
found part of the code path inside the jdk source which does this and now I'm
trying to determine what are the situations in which each option is taken.
Can JMX do that? The code I'm looking at is written in pure C.
Amos
On Oct 9, 2012 10:00 PM, "Jonathan Ben Avraham" <y...@tkos.co.il> wrote:
Hi Amos,
I did something like this with the JarSigner code in order to reverse
engineer it in C, which in the end I was able to do. IMHO, gdb is too high a
granularity to get anything usable out of the JVM execution. I suspect
that there is no alternative to sowing System.out.print's throughout the code.
Regards,
- yba
On Tue, 9 Oct 2012, Amos Shapira wrote:
Date: Tue, 9 Oct 2012 10:57:29 +1100
From: Amos Shapira <amos.shap...@gmail.com>
To: linux-il <linux-il@cs.huji.ac.il>
Subject: Looking for directions about compiling and tracing OpenJDK
Hi,
I have an idea which involves going somewhat deep into the bowls of
the Java Jar class loader when using the official Oracle JDK 6 (and soon
7).
To verify this I started looking at the JDK source code but it's
not small and I'd like to try to trace through it while it executes Java
programs.
Does anyone here have experience in doing something like this and
can give me some useful pointers on how to do this?
I'd like to be able to do "gdb java -jar HelloWorld.jar" and
single-step through the class loader while it loads HelloWorld.jar.
Thanks,
--Amos
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