Question

Sat Aug 4 03:07:30 PDT 2007

I'm not a great resource for advice on how to distribute and package things
in the open source world, but I'll certainly test whatever drops you make.
:-)

Meanwhile, speaking simply for what would be easiest from my position, it
would be nice if you could instead, pull the GNU binutils bits necessary
into the OpenJDK source repositories (SVN or Mercurial or whatever), then
add your diffs and just merge in changes to binutils as they occur.
(Frankly, I don't see that there'd be all that many changes you'd need to
make, once the disassembler was in place, but maybe I'm shortsighted here.)

Ted Neward
Java, .NET, XML Services
Consulting, Teaching, Speaking, Writing
http://www.tedneward.com

> -----Original Message-----
> From: Chuck.Rasbold at Sun.COM [mailto:Chuck.Rasbold at Sun.COM]
> Sent: Thursday, August 02, 2007 3:39 PM
> To: Ted Neward
> Cc: hotspot-compiler-dev at openjdk.dev.java.net
> Subject: Re: Question
> 
> Ted -
> 
> In early July, Sun's legal department gave the OK to open source a
> disassembler based on GNU binutils 2.17.  Any delay in progress since
> then is purely my own fault, as I have been attending to other
> engineering duties.
> 
> Based on advice I received so far, the plan is to start an OpenJDK
> subproject, and distribute the disassembler as a set of diffs and
> additions to the latest GNU binutils.  To use with +PrintAssembly, one
> would get binutils, apply the source patches, build using the supplied
> makefile into a .dll or .so, and install the library into a known
> location.
> 
> Internally, I still need to do some cleanup and testing of the
> disassembler...hopefully I haven't broken it moving it forward to
> 2.17.
> 
> Externally, I need to figure out how the OpenJDK process works, and
> make sure the distribution and packaging method is reasonable. I am a
> novice in the open source world, and recommendations from those more
> experienced than me are welcome.
> 
> -- Chuck
> 
> Ted Neward wrote:
> > Two questions:
> > (*) Are we any further on this?
> > (*) What about disassembly under Linux or Solaris? Anybody have good
> > suggestions for a disassembler to use for -XX:+PrintAssembly?
> >
> > Ted Neward
> > Java, .NET, XML Services
> > Consulting, Teaching, Speaking, Writing
> > http://www.tedneward.com
> >
> >
> >
> >>-----Original Message-----
> >>From: Chuck.Rasbold at Sun.COM [mailto:Chuck.Rasbold at Sun.COM]
> >>Sent: Tuesday, April 17, 2007 3:25 PM
> >>To: Ted Neward
> >>Cc: hotspot-compiler-dev at openjdk.dev.java.net
> >>Subject: Re: Question
> >>
> >>I can't apologize enough on how long this is taking.  We still working
> on
> >>it.
> >>
> >>-- Chuck
> >>
> >>Ted Neward wrote:
> >>
> >>>Any followup here? I'm still hoping to get the one that Sun uses,
> rather
> >>>than spend the energy/time/effort to write my own....
> >>>
> >>>Ted Neward
> >>>Java, .NET, XML Services
> >>>Consulting, Teaching, Speaking, Writing
> >>>http://www.tedneward.com
> >>>
> >>>
> >>>
> >>>>-----Original Message-----
> >>>>From: Ted Neward [mailto:ted at tedneward.com]
> >>>>Sent: Monday, January 15, 2007 4:30 PM
> >>>>To: hotspot-compiler-dev at openjdk.dev.java.net
> >>>>Subject: RE: Question
> >>>>
> >>>>Any word on getting this thing open-sourced? I know it's probably
> >>
> >>possible
> >>
> >>>>to build one for myself, but.... Oy. Would *much* rather not have to
> do
> >>>>that.
> >>>>
> >>>>Ted Neward
> >>>>Java, .NET, XML Services
> >>>>Consulting, Teaching, Speaking, Writing
> >>>>http://www.tedneward.com
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>-----Original Message-----
> >>>>>From: Chuck.Rasbold at Sun.COM [mailto:Chuck.Rasbold at Sun.COM]
> >>>>>Sent: Thursday, December 07, 2006 2:44 PM
> >>>>>To: hotspot-compiler-dev at openjdk.dev.java.net
> >>>>>Subject: Re: Question
> >>>>>
> >>>>>Sun has a disassembler which is based on the disassembler source code
> >>>>
> >>>>from
> >>>>
> >>>>
> >>>>>a gdb
> >>>>>of many years past.
> >>>>>
> >>>>>The disassembler is built into a .so or .dll. Typically, I place that
> >>>>>disassembler.so file in the same directory as the libjvm.so of
> >>
> >>interest.
> >>
> >>>>>Other
> >>>>>times, on Solaris, I will set my LD_LIBRARY_PATH to include the
> >>>>
> >>>>directory
> >>>>
> >>>>
> >>>>>where
> >>>>>the .so resides.  I'm not much of a Windows guy, so I can't advise
> you
> >>>>>there.
> >>>>>
> >>>>>Until now, the disassembler source has been kept separate from the
> >>>>
> >>>>HotSpot
> >>>>
> >>>>
> >>>>>source tree and the binary not distributed to customers in order to
> >>>>
> >>>>avoid
> >>>>
> >>>>
> >>>>>the
> >>>>>complications that would be incurred by Sun due to the GPL.
> >>>>>
> >>>>>Of course, the world is now different and due to an oversight, it was
> >>>>
> >>>>not
> >>>>
> >>>>
> >>>>>included when HotSpot was open sourced.  We're currently working on
> >>>>>getting it
> >>>>>distributed with HotSpot.
> >>>>>
> >>>>>Hopefully, I've made things a bit clearer.
> >>>>>
> >>>>>-- Chuck
> >>>>>
> >>>>>Ted Neward wrote:
> >>>>>
> >>>>>
> >>>>>>So help me out here, if you don't mind--when you say I will "need
> the
> >>>>>>disassembler", you're saying I have to download (what?) and put it
> >>>>>
> >>>>>(where?)?
> >>>>>
> >>>>>
> >>>>>>Unfortunately, the link you sent, Steve, doesn't say much beyond
> that
> >>>>>
> >>>>>fact
> >>>>>
> >>>>>
> >>>>>>that the poster hacked it--I'm not sure what to do with it once I
> find
> >>>>>
> >>>>>it.
> >>>>>
> >>>>>
> >>>>>>Can I grab the GNU disassembler and use it, since I'm not in the
> same
> >>>>>
> >>>>>boat
> >>>>>
> >>>>>
> >>>>>>as Sun re: licensning and distribution issues?
> >>>>>>
> >>>>>>Bear in mind, I want to do this under Windows if I can; I dunno if
> >>>>
> >>>>that
> >>>>
> >>>>
> >>>>>>makes a difference.
> >>>>>>
> >>>>>>Sorry for being such the noob, but one hope I have is to sort
> through
> >>>>>
> >>>>>all
> >>>>>
> >>>>>
> >>>>>>this and put it into an article or paper or presentation and help
> >>>>
> >>>>others
> >>>>
> >>>>
> >>>>>to
> >>>>>
> >>>>>
> >>>>>>get into seeing all this stuff without having to wade through the
> same
> >>>>>
> >>>>>steps
> >>>>>
> >>>>>
> >>>>>>by hand. :-)
> >>>>>>
> >>>>>>Ted Neward
> >>>>>>Java, .NET, XML Services
> >>>>>>Consulting, Teaching, Speaking, Writing
> >>>>>>http://www.tedneward.com
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>-----Original Message-----
> >>>>>>>From: Peter.Kessler at Sun.COM [mailto:Peter.Kessler at Sun.COM]
> >>>>>>>Sent: Tuesday, December 05, 2006 11:57 AM
> >>>>>>>To: hotspot-compiler-dev at openjdk.dev.java.net
> >>>>>>>Subject: Re: Question
> >>>>>>>
> >>>>>>>steve goldman wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>Ted Neward wrote:
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>>So one thing I’d like to see (via console output or some other
> >>>>>>>>>out-of-band
> >>>>>>>>>form of view) is the code generated by the JIT compiler when it
> >>
> >>JITs
> >>
> >>>>a
> >>>>
> >>>>
> >>>>>>>>>method. What’s the best way for doing so?
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>>>You need two things, a "develop" version of hotspot and the
> >>>>>>>>disassembler. There is a flag -XX:+PrintAssembly which will
> attempt
> >>>>
> >>>>to
> >>>>
> >>>>
> >>>>>>>>dynamically load the disassembler and as various code blobs are
> >>>>>>>>generated will invoke the disassembler. The product version of
> >>>>
> >>>>hotspot
> >>>>
> >>>>
> >>>>>>>>doesn't enable this flag so you need to build a version that isn't
> >>>>
> >>>>the
> >>>>
> >>>>
> >>>>>>>>product (or convert the switch from "develop" to "product"). In
> any
> >>>>>
> >>>>>case
> >>>>>
> >>>>>
> >>>>>>>>I think you'll have to build the jvm. Additionally you need the
> >>>>>>>>disassembler. Unfortunately that got left out of the initial
> source
> >>>>>>>>release. The disassembler we use is based on the gnu disassembler
> >>
> >>and
> >>
> >>>>>>>>because it was gpl before hotspot was gpl'd it was kept separate
> >>
> >>from
> >>
> >>>>>>>>the hotspot code. That should be fixed soon I'd guess. There was a
> >>>>
> >>>>note
> >>>>
> >>>>
> >>>>>>>>here
> >>>>>>>>http://c1.complang.tuwien.ac.at/pipermail/cacao/2006-
> >>>>>>>
> >>>>>>>November/000195.html
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>where someone hacked the cacao disassembler to get around this.
> The
> >>>>>>>>disassembler you build (.dll or .so) needs to go into the jvm (or
> >>>>>>>>somewhere in your LD_LIBRARY_PATH or equivalent) were it will get
> >>>>>>>
> >>>>>>>loaded.
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>With the server version of hotspot there is another develop flag
> >>>>>>>>-XX:+PrintOptoAssembly which will print a very stylized version of
> >>>>
> >>>>the
> >>>>
> >>>>
> >>>>>>>>code the jit produces. It will do this without the disassembler
> >>
> >>being
> >>
> >>>>>>>>present.
> >>>>>>>
> >>>>>>>You can also use the "fastdebug" version of HotSpot to get
> >>>>>>>access to the -XX:+PrintAssembly flag.  The fastdebug version
> >>>>>>>is built as part of the "make world" target.  You still need
> >>>>>>>the dissassembler, as Steve says.
> >>>>>>>
> >>>>>>>			... peter
> >>>>>>>
> >>>>>>>--
> >>>>>>>No virus found in this incoming message.
> >>>>>>>Checked by AVG Free Edition.
> >>>>>>>Version: 7.5.432 / Virus Database: 268.15.9/573 - Release Date:
> >>>>>
> >>>>>12/5/2006
> >>>>>
> >>>>>
> >>>>>>>4:07 PM
> >>>>>>>
> >>>>>>
> >>>>>>
> >>>>>--
> >>>>>No virus found in this incoming message.
> >>>>>Checked by AVG Free Edition.
> >>>>>Version: 7.5.432 / Virus Database: 268.15.15/579 - Release Date:
> >>>>
> >>>>12/7/2006
> >>>>
> >>>>
> >>>>>1:31 PM
> >>>>>
> >>>>
> >>>>--
> >>>>No virus found in this outgoing message.
> >>>>Checked by AVG Free Edition.
> >>>>Version: 7.5.432 / Virus Database: 268.16.12/628 - Release Date:
> >>
> >>1/15/2007
> >>
> >>>>11:04 AM
> >>>>
> >>>>
> >>>>--
> >>>>No virus found in this incoming message.
> >>>>Checked by AVG Free Edition.
> >>>>Version: 7.5.432 / Virus Database: 268.16.12/628 - Release Date:
> >>
> >>1/15/2007
> >>
> >>>>11:04 AM
> >>>>
> >>>
> >>>
> >>--
> >>No virus found in this incoming message.
> >>Checked by AVG Free Edition.
> >>Version: 7.5.446 / Virus Database: 269.4.0/762 - Release Date: 4/15/2007
> >>4:22 PM
> >>
> >
> >
> > No virus found in this outgoing message.
> > Checked by AVG Free Edition.
> > Version: 7.5.476 / Virus Database: 269.11.0/929 - Release Date:
> 7/31/2007
> > 5:26 PM
> >
> >
> 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.476 / Virus Database: 269.11.2/933 - Release Date: 8/2/2007
> 2:22 PM
> 

No virus found in this outgoing message.
Checked by AVG Free Edition. 
Version: 7.5.476 / Virus Database: 269.11.2/933 - Release Date: 8/2/2007
2:22 PM