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From Oliver Deakin <oliver.dea...@googlemail.com>
Subject Re: [GSoC] Proposal For jdb command line debugger tool.
Date Thu, 02 Apr 2009 12:12:30 GMT
No problem - it was good to have it clarified. I hope that one or both 
of you can get a proposal completed by the deadline tomorrow.

Regards,
Oliver

hu jing wrote:
> Hi Oliver.
> I am sorry that my friend and I apply for one project as a group. I find
> that only individual may work on a given project. So we will continue to
> apply the debugger project as an individual.
>
>
> 2009/4/1 Oliver Deakin <oliver.deakin@googlemail.com>
>
>   
>> Hi, and welcome to Harmony!
>>
>> hu jing wrote:
>>
>>     
>>> Hi all,
>>>
>>>    I am interested in the "jdb command line debugger tool". I find Sun jdb
>>>
>>>
>>>       
>> Great!
>>
>>     
>>> is not very friendly to developers. I want to add some useful function to
>>> this tool. Such as, Auto-complete command line, smart format for the user
>>> input. And we can also supply some interfaces to further development.
>>>    Wen Dong(zwd2005@gmail.com) and I want to participate in this tool
>>> development. We are from the same laboratory of the Department of Computer
>>> Science of Nanjing University. We worked together for two years and now we
>>> are both interns in IBM CDL. I think we can work out the debugger tool
>>> pretty.
>>>
>>>
>>>       
>> I don't know what the rules are for co-working on a project - I believe
>> each project has to be an individual effort. You could ask on the GSoC
>> discussion mailing list (mailing lists and other useful info can be found
>> here [1]).
>>
>>     The popular architecture is JPDA(Java Platform Debugger Architecture).
>>     
>>> JPDA contains three parts: JVMTI, JDWP and JDI. JVMTI(Java Virtual Machine
>>> Tool Interface) supply a set of native interface supplied by JVM. The
>>> development based on the JVMTI level is complex and hard to be extended
>>> and
>>> modified. JDWP supplies a standard protocol for the communication between
>>> the debugger and debuggee. And it also provides the socket interface. JDI
>>> is
>>> debug interface. It is mostly implemented in Java. JVMTI and JDWP are
>>> based
>>> native code. We want to implement the java command line debugger tool in
>>> C/C++ considering efficiency. We will use JDWP interface for development
>>> efficiency and Portability.
>>>
>>>
>>>       
>> Have you considered coding the tool in Java and using JDI to access all the
>> required functions? I think it will be more portable, easier to maintain,
>> and will fit more naturally with the other command line tools we have in
>> Harmony.
>>
>>     The following is our main idea for this tool:
>>     
>>>    1.format the user input.
>>>    2.validate the command arguments.
>>>    3.Create connection between debugger and JVM, and here we can use the
>>> JDWP Transport Interface. Based on the JDWP, We create packages containing
>>> the command information and send packages to JVM by using the transport
>>> interface. JVM will process these packages and send the feedback to the
>>> debugger. And we will process this information.
>>>    4.print the message on the console.
>>>
>>>
>>> Schedule:
>>>       We can work 20 hours each week.
>>>       April 4 ~ April 30: Be family with JDWP and JDWP Transport
>>> Interface.
>>>       May 1 ~ May 22: meet our mentors, read the documentation and get
>>> some
>>> suggestions from our mentors.
>>>       May 23 ~ May 30: to determine the final framework and algorithm
>>> details, divide the work with my partners.
>>>       June 1 ~ June 30: coding.
>>>       July 1 ~ July 5: integration, test and debug for mid-term
>>> evaluations.
>>>       July 6 ~ August 11: process the debug, documentation and
>>> integration.
>>>       August 12 ~ August 24: write test unit, debug and final release.
>>>
>>>
>>>       
>> Looks like a good plan. You need to clear up the issue of working with a
>> partner - if that is a possibility, or you can decide on one of you to work
>> on the project alone, then please draft a submission in the GSoC tool [2] as
>> soon as possible. The deadline for submissions is Friday 3rd April.
>>
>> Regards,
>> Oliver
>>
>> [1] http://socghop.appspot.com/document/show/program/google/gsoc2009/faqs
>> [2] http://socghop.appspot.com/
>>
>>
>>     
>>> Jing Hu , WenDong Zhang.
>>>
>>>
>>>
>>>       
>> --
>> Oliver Deakin
>> Unless stated otherwise above:
>> IBM United Kingdom Limited - Registered in England and Wales with number
>> 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire
>> PO6 3AU
>>
>>
>>     
>
>   

-- 
Oliver Deakin
Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number 741598. 
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU


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