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Re: GDB and the OpenJDK JVM

From: Gary Benson <gbenson at redhat dot com>
To: Daniel Jacobowitz <drow at false dot org>
Cc: gdb at sourceware dot org
Date: Thu, 9 Feb 2012 16:16:12 +0000
Subject: Re: GDB and the OpenJDK JVM
References: <CAN9gPaHVeZ+OTN47Tfqfdy4uCdDjU0du68q+8ZnuMf+uJjDqbg@mail.gmail.com>

Hi Daniel,

Daniel Jacobowitz wrote:
> Has anyone investigated non-trivial integration between GDB and this
> (or any other) JVM?  So far I haven't turned up anything useful.  Some
> examples of the sorts of integration I mean:
> 
> * Showing information about Java objects given JNI handles
> * Interleaving Java frames in the stack trace
> * Fabricating unwind information for JIT'd code
> * Automatically handling SEGVs related to the garbage collector
>   without hiding SEGVs for native code

I don't know of anybody who has done any work in this area.  I do know
that HotSpot has a number of functions designed solely to be called by
debuggers or debug code, and it's possible that #1 and #3 are covered
that way.  None of this stuff is documented anywhere I know of so it's
worth asking on one of the HotSpot lists in case somebody can help.

Cheers,
Gary

-- 
http://gbenson.net/

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  - From: Daniel Jacobowitz

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