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From Mike <mikeandm...@gmail.com>
Subject Re: [GSoC] My proposal
Date Wed, 01 Apr 2009 03:19:18 GMT
Precisely. ^_^, That just what i mean.

Of course, Please try to prove me wrong if you found something more.

Thanks 
Yours Mike


在 2009-04-01三的 11:16 +0800,WenDong Zhang写道:
> oh, I see what you said: From the research i've been done, it seems
> that classfile will record the its imports for us.
> 
> we can get the imports information from .class file, you mean we ony
> need the binary .class file and we don't have to run it?
> 
> 2009/4/1 Mike <mikeandmore@gmail.com>:
> > You can search my ideas on the mail-archiver.
> > Besides dynamic tracing, I also use dot-class file parsing (The static
> > approach). The dot-class file will record dependency in its
> > ConstantPool.
> >
> > Dynamic tracing is used to cover java's reflection. so it should be ok
> > for user to test their reflection code, isn't it?
> >
> > Yours Mike
> >
> > 在 2009-04-01三的 11:03 +0800,WenDong Zhang写道:
> >> I think dynamic tracing the loaded classes is pretty good, the only
> >> shortcoming is we need to write the test unit completely or there will
> >> be some classes missing in our mimi jre.
> >>
> >> I still want to know are there any other ways to implement this work?
> >> My first thought is use text analysis, but there are to many problems:
> >> dynamic loading class, third party lib...
> >>
> >> 2009/4/1 Mike <mikeandmore@gmail.com>:
> >> > 在 2009-04-01三的 00:30 +0800,Daniel Gong写道:
> >> >> By saying dynamic class loading, do you mean reflection based class
loading
> >> >> or just class loader way?
> >> >> For the former one, I don't think the dynamic trace strategy is right.
In my
> >> >> opinion, to do dynamic tracing we need to examine all possible running
path
> >> >> of the program. It is unrealistic, especially when the program must
interact
> >> >> with users.
> >> >> The latter one may have the same problem as the former one, I guess.
> >> >> In fact, there is a condition that the class name string is from the
user
> >> >> input. If so, I think we can ignore the class selector and offer the
whole
> >> >> jre. Except that, it is always possible to parse the code and generate
the
> >> >> dynamic loaded class name, although I still don't have a structured
> >> >> algorithm...
> >> >> Hehe, I find my words a bit orderless...
> >> >>
> >> >> Daniel
> >> >
> >> > 1 I think the dynamic tracing is possible. I took a look at the drlvm's
> >> > source these days. It should be easy to let the drlvm leave a trace for
> >> > us.
> >> > 2 Dynamic tracing should be involved because it can help developers to
> >> > do their tests. which means that dynamic collection is being performed
> >> > when testing.
> >> >
> >> > Yours Mike
> >> >
> >> >> On Tue, Mar 31, 2009 at 12:17 PM, Xiao-Feng Li <xiaofeng.li@gmail.com>wrote:
> >> >>
> >> >> > One another thing is the consideration of dynamic class loading.
> >> >> >
> >> >> > Thanks,
> >> >> > xiaofeng
> >> >> >
> >> >> > On Mon, Mar 30, 2009 at 11:57 PM, Jimmy,Jing Lv <firepure@gmail.com>
> >> >> > wrote:
> >> >> > > Wow the plan's excellent Daniel!
> >> >> > >
> >> >> > > And an advanced question, as you know, the jre does not only
have
> >> >> > classes,
> >> >> > > but also resources files, property files and etc. So do you
have any
> >> >> > ideas
> >> >> > > on select them and merge into the customized JRE? :)
> >> >> > >
> >> >> > > 2009/3/30 Daniel Gong <daniel.gong.fudan@gmail.com>
> >> >> > >
> >> >> > >> Hi all,
> >> >> > >>    I'm a postgraduate student from Fudan University,
Shanghai, China.
> >> >> > >>   This is my first time joining GSoC and I was not quite
clear that I
> >> >> > >> should exchange my ideas with possible mentors. I've
submitted my
> >> >> > proposal
> >> >> > >> today. It's lucky that I can still modify it.
> >> >> > >>   Here is my proposal, any criticism and suggestions
are welcome~
> >> >> > >>
> >> >> > >> =====================================================
> >> >> > >>
> >> >> > >> *Abstract:*
> >> >> > >>
> >> >> > >> The main idea to deal with the subject is to collect
infomation from the
> >> >> > >> input first and then generate smallest JRE according
to the infomation
> >> >> > >> collected and harmony classes dependences.
> >> >> > >>
> >> >> > >> *Detailed Description:*
> >> >> > >>
> >> >> > >> The implementation of the tool can be divided into 4
parts:
> >> >> > >>
> >> >> > >>   1. Infomation Collector. Automatic lexcial tool such
as JLex may be
> >> >> > used
> >> >> > >>   to analysis the input code and collect infomation including
which
> >> >> > classes
> >> >> > >> in
> >> >> > >>   JRE does the project depend on.
> >> >> > >>   2. Data structure design. Both project-jre class dependence
and jre
> >> >> > inner
> >> >> > >>   class dependence should be represented in an uniform
way.
> >> >> > >>   3. Class Lister. An algorithm should be designed to
compute with the
> >> >> > >>   dependence and list out the classes needed in the smallest
JRE.
> >> >> > >>   4. JRE Builder. Build a JRE according to the class
list.
> >> >> > >>
> >> >> > >> *Initial* *Algorithm Design*
> >> >> > >>
> >> >> > >> Use a, b to represent two classes, and <a, b> to
represent a relation
> >> >> > >> between a & b, that is, a depends on b, in other
words, b is refered in
> >> >> > >> source code of a.
> >> >> > >>
> >> >> > >>   1. Given a project with its class set P, let set S
= P and set M =
> >> >> > empty.
> >> >> > >>
> >> >> > >>   2. For each class c in S, search for dependence <c,
*>, and for each d
> >> >> > >>   that <c, d> exists and d is not in M, put d in
S. After searching for
> >> >> > <c,
> >> >> > >>   *>, put c in M and delete it from S.
> >> >> > >>   3. Loop step 2 until S is empty, return M - P.
> >> >> > >>
> >> >> > >> Here a project's class set includes its customized classes
and classes
> >> >> > in
> >> >> > >> other packages that the project may link to.
> >> >> > >>
> >> >> > >> *Possible problems to solve*
> >> >> > >>
> >> >> > >> To collect the infomation, just reading the "import"
part of the code is
> >> >> > >> not
> >> >> > >> a precise strategy. A lexicial scan of the code from
begin to end is a
> >> >> > >> must.
> >> >> > >> Automatic lexcial tools can be used to solve the problem.
> >> >> > >>
> >> >> > >> JRE is not just a simple collection of classes needed.
Getting familiar
> >> >> > >> with
> >> >> > >> the structure of Harmony JRE is a must.
> >> >> > >>
> >> >> > >> *Draft Timeline*
> >> >> > >>
> >> >> > >>   - Week 1-2 Complete the design of data structure and
the algorithm;
> >> >> > >>   - Week 3-4 Implement the module of infomation collector;
> >> >> > >>   - Week 5-6 Implement the algorithm to list out the
classes;
> >> >> > >>   - Week 7-8 Implement the JRE builder;
> >> >> > >>   - Week 9 Debug the whole module and make necessary
modifications
> >> >> > >>   to successfully complete the subject.
> >> >> > >>
> >> >> > >> *Additional Information:*
> >> >> > >>
> >> >> > >> I've been learning and using Java since 3 years ago.
Although my
> >> >> > >> experience of Harmony is not that vast, my knowledge
in programming,
> >> >> > >> software architecture, compiler building and algorithm
can help me to
> >> >> > learn
> >> >> > >> fast and handle the problem.
> >> >> > >>
> >> >> > >> I'm 23 years old, living in Shanghai, China, attending
Fudan University.
> >> >> > >>
> >> >> > >> =====================================================
> >> >> > >>
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > --
> >> >> > >
> >> >> > > Best Regards!
> >> >> > >
> >> >> > > Jimmy, Jing Lv
> >> >> > > China Software Development Lab, IBM
> >> >> > >
> >> >> >
> >> >> >
> >> >> >
> >> >> > --
> >> >> > http://people.apache.org/~xli
> >> >> >
> >> >
> >> >
> >>
> >>
> >>
> >
> >
> 
> 
> 


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